S12 MagniV
Microcontrollers
freescale.com
MC9S12ZVM-Family
Reference Manual and Datasheet
Rev. 2.2
27 APR 2015
MC9S12ZVMRMV1
Freescale reserves the right to make changes without further notice to any products herein. Freescale makes no warranty, representation, or guarantee
regarding the suitability of its products for any particular purpose, nor does Freescale assume any liability arising out of the application or use of any product
or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters that may be
provided in Freescale data sheets and/or specifications can and do vary in different applications, and actual performance may vary over time. All operating
parameters, including “typicals,” must be validated for each customer application by customer’s technical experts. Freescale does not convey any license
under its patent rights nor the rights of others. Freescale Semiconductor products are not designed, intended, or authorized for use as components in systems
intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the
Freescale Semiconductor product could create a situation where personal injury or death may occur. Should Buyer purchase or use Freescale
Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold Freescale Semiconductor and its officers,
employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of,
directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Freescale
Semiconductor was negligent regarding the design or manufacture of the part.
The document revision on the Internet is the most current. To verify this is the latest revision, refer to:
freescale.com.
This document contains information for all modules except the CPU. For CPU information please refer to
the CPU S12Z Reference Manual. This revision history table summarizes changes to this document. The
individual module sections contain revision history tables with more detailed information.
CAUTION
ZVMC256, ZVML31, ZVM32 and ZVM16 specific information is preliminary until these
devices are qualified.
NOTE
This reference manual documents the entire S12ZVM-Family.
It contains a superset of features within the family.
Some module versions differ from one part to another within the family.
Section 1.2.1 MC9S12ZVM-Family Member Comparison provides support to access the
correct information for a particular part within the family.
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Table 0-1. Revision History
Date Revision Description
22 MAY2014 1.4 Updated family derivative table for S12ZVML32, S12ZVM32 and S12ZVM16 devices
Added 64KB, 32KB and 16KB derivative information to flash module chapter
Added pin routing options for S12ZVM32 and S12ZVM16 devices
Added HV Phy information for the S12ZVM32 and S12ZVM16 derivatives
Updated Part ID assignment table and ordering information for S12ZVM32 and S12ZVM16
Corrected PLL VCO maximum frequency specification
Changed VLVLSA maximum from 7V to 6.9V
Added electrical parameter for HD division ratio through the phase multiplexer
Corrected preferred VRL reference from VRL_1 to VRL_0
Included NVM timing parameters for the S12ZVM32 and S12ZVM16 devices
Added GDU S12ZVM32 and S12ZVM16 specific differences and electrical specifications
Added references to fWSTAT
Added VDDX short circuit fall back current and temperature/input dependency specs.
22 SEP 2014 1.5 Removed incorrect references to PACLK in TIM chapter
Improved clarity of routing options in PIM chapter.
Updated S12ZVM- Family derivative table.
Added 48LQFP thermal package parameters
Extended LINPHY specification range minimum to 5V
Updated BKGD pin I/O specification
Specified ADC accuracy for a range of VDDA and VREF.
20 MAR 2015 2.0 Added ZVMC256 information
Added maskset 2N95G information
Added more detailed PTU minimum trigger spacing description
Updated CPMU, PIM and GDU chapters for ZVMC256
Improved CPMU specification clarity (see CPMU revision history)
Removed electrical parameter classification
Added reset startup timing parameter
Updated BATS parameters
Extended BKGD VIL condition from 3.15V to 3.13V
Extended GDU operating range from 26V to 26.6V
Temperature sensor output at 150C changed from 2.25V to 2.33V.
Added GDU VBS current parameter
Updated package thermal information for ZVM32 and ZVM16 parts
Added VBG temperature and voltage dependency parameters
Added device stop current at 105C.
22 APR 2015 2.1 Updated Stop and Wait current parameter values (ISUPS, ISUPW)
Corrected 80LQFP-EP pin name from VSS2 to VSS1
Updated ZVMC256 VDDS regulator parameters.
Changed PL0 ESD specification
Minor corrections to PIM, PMF, SRAM and ADC chapters (see module revision histories)
27 APR 2015 2.2 Updated Stop current parameter values (ISUPS)
Updated LINPHY parameter range limit to 5.5V
Added more information about VDDS1, VDDS2, SNPS1, SNPS2 to CPMU chapter.
Reintroduced EPRES bit for GDU V4
Added 80LQFP-EP mechanical package information
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MC9S12ZVM Family Reference Manual Rev. 2.2
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Chapter 1
Device Overview MC9S12ZVM-Family
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
1.2.1 MC9S12ZVM-Family Member Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
1.2.2 Module Version Differences Within The S12ZVM Family . . . . . . . . . . . . . . . . . . . . . . . 23
1.2.3 Functional Differences Between Masksets 0N95G, 1N95G, 2N95G . . . . . . . . . . . . . . . . 24
1.3 Chip-Level Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
1.4 Module Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1.4.1 S12Z Central Processor Unit (CPU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1.4.2 Embedded Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
1.4.3 Clocks, Reset & Power Management Unit (CPMU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
1.4.4 Main External Oscillator (XOSCLCP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.4.5 Timer (TIM0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.4.6 Timer (TIM1) (ZVMC256 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.4.7 Pulse width Modulator with Fault protection (PMF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.4.8 Programmable Trigger Unit (PTU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.4.9 LIN physical layer transceiver (ZVML devices only) . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.4.10 Serial Communication Interface Module (SCI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.4.11 Multi-Scalable Controller Area Network (MSCAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.4.12 Serial Peripheral Interface Module (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.4.13 Analog-to-Digital Converter Module (ADC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.4.14 Supply Voltage Sensor (BATS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.4.15 On-Chip Voltage Regulator system (VREG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.4.16 Gate Drive Unit (GDU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.4.17 Current Sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.4.18 High Voltage Physical Interface (ZVM32, ZVM16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.4.19 CAN Physical Layer Module (ZVMC256 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.4.20 Pulse Width Modulation Module (PWM) (ZVMC256 only) . . . . . . . . . . . . . . . . . . . . . 32
1.5 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
1.6 Device Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
1.6.1 Flash Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
1.6.2 Part ID Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
1.7 Signal Description and Device Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
1.7.1 Pin Assignment Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
1.7.2 Detailed External Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
1.7.3 Power Supply And Voltage Regulator Related Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
1.7.4 Package and Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
1.8 Internal Signal Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
1.8.1 ADC Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
1.8.2 Motor Control Loop Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
1.8.3 Device Level PMF Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
1.8.4 BDC Clock Source Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
1.8.5 LINPHY Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
1.8.6 HVPHY Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
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1.8.7 FTMRZ Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
1.8.8 CPMU Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
1.9 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
1.9.1 Chip Configuration Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
1.9.2 Debugging Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
1.9.3 Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
1.10 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
1.10.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
1.10.2 Securing the Microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
1.10.3 Operation of the Secured Microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
1.10.4 Unsecuring the Microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
1.10.5 Reprogramming the Security Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
1.10.6 Complete Memory Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
1.11 Resets and Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
1.11.1 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
1.11.2 Interrupt Vectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
1.11.3 Effects of Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
1.12 Module device level dependencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
1.12.1 CPMU COP and GDU GSUF Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
1.12.2 CPMU High Temperature Trimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
1.12.3 Flash IFR Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
1.13 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
1.13.1 ADC Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
1.13.2 SCI Baud Rate Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
1.13.3 Motor Control Application Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
1.13.4 BDCM Complementary Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
1.13.5 BLDC Six-Step Commutation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
1.13.6 PMSM Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
1.13.7 Power Domain Overview (All devices except ZVMC256) . . . . . . . . . . . . . . . . . . . . . . . 90
1.13.8 Power Domain Overview (ZVMC256) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Chapter 2
Port Integration Module (S12ZVMPIMV3)
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
2.1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
2.1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
2.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
2.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
2.3.1 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
2.3.2 PIM Registers 0x0200-0x020F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
2.3.3 PIM Generic Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
2.3.4 PIM Generic Register Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
2.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
2.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
2.4.2 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
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2.4.3 Pin I/O Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
2.4.4 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
2.4.5 Pin interrupts and Key-Wakeup (KWU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
2.4.6 Over-Current Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
2.4.7 High-Voltage Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
2.5 Initialization and Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
2.5.1 Port Data and Data Direction Register writes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
2.5.2 Open Input Detection on HVI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
2.5.3 Over-Current Protection on EVDD1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Chapter 3
Memory Mapping Control (S12ZMMCV1)
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
3.1.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
3.1.2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
3.1.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
3.1.4 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
3.1.5 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
3.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
3.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
3.3.1 Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
3.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
3.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
3.4.1 Global Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
3.4.2 Illegal Accesses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
3.4.3 Uncorrectable ECC Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Chapter 4
Interrupt (S12ZINTV0)
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
4.1.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
4.1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
4.1.3 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
4.1.4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
4.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
4.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
4.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
4.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
4.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
4.4.1 S12Z Exception Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
4.4.2 Interrupt Prioritization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
4.4.3 Priority Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
4.4.4 Reset Exception Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
4.4.5 Exception Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
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4.4.6 Interrupt Vector Table Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
4.5 Initialization/Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
4.5.1 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
4.5.2 Interrupt Nesting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
4.5.3 Wake Up from Stop or Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Chapter 5
Background Debug Controller (S12ZBDCV2)
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5.1.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5.1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
5.1.3 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
5.1.4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
5.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
5.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
5.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
5.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
5.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
5.4.1 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
5.4.2 Enabling BDC And Entering Active BDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
5.4.3 Clock Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
5.4.4 BDC Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
5.4.5 BDC Access Of Internal Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
5.4.6 BDC Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
5.4.7 Serial Interface Hardware Handshake (ACK Pulse) Protocol . . . . . . . . . . . . . . . . . . . . 209
5.4.8 Hardware Handshake Abort Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
5.4.9 Hardware Handshake Disabled (ACK Pulse Disabled) . . . . . . . . . . . . . . . . . . . . . . . . . 212
5.4.10 Single Stepping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
5.4.11 Serial Communication Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
5.5 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
5.5.1 Clock Frequency Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Chapter 6
S12Z Debug (S12ZDBG) Module
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
6.1.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
6.1.2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
6.1.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
6.1.4 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
6.1.5 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
6.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
6.2.1 External Event Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
6.2.2 Profiling Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
6.3 Memory Map and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
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6.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
6.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
6.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
6.4.1 DBG Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
6.4.2 Comparator Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
6.4.3 Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
6.4.4 State Sequence Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
6.4.5 Trace Buffer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
6.4.6 Code Profiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
6.4.7 Breakpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
6.5 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
6.5.1 Avoiding Unintended Breakpoint Re-triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
6.5.2 Debugging Through Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
6.5.3 Breakpoints from other S12Z sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
6.5.4 Code Profiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Chapter 7
ECC Generation Module (SRAM_ECCV1)
7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
7.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
7.2 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
7.2.1 Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
7.2.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
7.3 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
7.3.1 Aligned 2 and 4 Byte Memory Write Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
7.3.2 Other Memory Write Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
7.3.3 Memory Read Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
7.3.4 Memory Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
7.3.5 Interrupt Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
7.3.6 ECC Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
7.3.7 ECC Debug Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Chapter 8
S12 Clock, Reset and Power Management Unit (V10 and V6)
8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
8.1.1 Differences between S12CPMU_UHV_V10 and S12CPMU_UHV_V6 . . . . . . . . . . . 281
8.1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
8.1.3 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
8.1.4 S12CPMU_UHV_V10_V6 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
8.2 Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
8.2.1 RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
8.2.2 EXTAL and XTAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
8.2.3 VSUP — Regulator Power Input Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
8.2.4 VDDA, VSSA — Regulator Reference Supply Pins . . . . . . . . . . . . . . . . . . . . . . . . . . 289
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8.2.5 VDDX, VSSX— Pad Supply Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
8.2.6 VDDC— CAN Supply Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
8.2.7 VDDS1— Sensor Supply1 Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
8.2.8 VDDS2— Sensor Supply2 Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
8.2.9 BCTL— Base Control Pin for external PNP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
8.2.10 BCTLC — Base Control Pin for external PNP for VDDC power domain . . . . . . . . . . 291
8.2.11 BCTLS1 — Base Control Pin for external PNP for VDDS1 power domain . . . . . . . . 291
8.2.12 BCTLS2 — Base Control Pin for external PNP for VDDS2 power domain . . . . . . . . 292
8.2.13 SNPS1 — Sense Pin for VDDS1 power domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
8.2.14 SNPS2 — Sense Pin for VDDS2 power domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
8.2.15 VSS1,2 — Core Ground Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
8.2.16 VDD— Core Logic Supply Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
8.2.17 VDDF— NVM Logic Supply Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
8.2.18 API_EXTCLK — API external clock output pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
8.2.19 TEMPSENSE — Internal Temperature Sensor Output Voltage . . . . . . . . . . . . . . . . . . 293
8.3 Memory Map and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
8.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
8.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
8.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
8.4.1 Phase Locked Loop with Internal Filter (PLL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
8.4.2 Startup from Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
8.4.3 Stop Mode using PLLCLK as source of the Bus Clock . . . . . . . . . . . . . . . . . . . . . . . . 340
8.4.4 Full Stop Mode using Oscillator Clock as source of the Bus Clock . . . . . . . . . . . . . . . 340
8.4.5 External Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
8.4.6 System Clock Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
8.5 Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
8.5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
8.5.2 Description of Reset Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
8.5.3 Oscillator Clock Monitor Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
8.5.4 PLL Clock Monitor Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
8.5.5 Computer Operating Properly Watchdog (COP) Reset . . . . . . . . . . . . . . . . . . . . . . . . . 346
8.5.6 Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
8.5.7 Low-Voltage Reset (LVR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
8.6 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
8.6.1 Description of Interrupt Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
8.7 Initialization/Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
8.7.1 General Initialization Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
8.7.2 Application information for COP and API usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
8.7.3 Application Information for PLL and Oscillator Startup . . . . . . . . . . . . . . . . . . . . . . . . 351
Chapter 9
Analog-to-Digital Converter (ADC12B_LBA)
9.1 Differences ADC12B_LBA V1 vs V2 vs V3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
9.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
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9.3 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
9.3.1 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
9.3.2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359
9.4 Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360
9.4.1 Detailed Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360
9.5 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361
9.5.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361
9.5.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
9.6 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397
9.6.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397
9.6.2 Analog Sub-Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397
9.6.3 Digital Sub-Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 398
9.7 Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
9.8 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
9.8.1 ADC Conversion Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
9.8.2 ADC Sequence Abort Done Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
9.8.3 ADC Error and Conversion Flow Control Issue Interrupt . . . . . . . . . . . . . . . . . . . . . . . 412
9.9 Use Cases and Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
9.9.1 List Usage — CSL single buffer mode and RVL single buffer mode . . . . . . . . . . . . . . 413
9.9.2 List Usage — CSL single buffer mode and RVL double buffer mode . . . . . . . . . . . . . 413
9.9.3 List Usage — CSL double buffer mode and RVL double buffer mode . . . . . . . . . . . . . 414
9.9.4 List Usage — CSL double buffer mode and RVL single buffer mode . . . . . . . . . . . . . 414
9.9.5 List Usage — CSL double buffer mode and RVL double buffer mode . . . . . . . . . . . . . 415
9.9.6 RVL swapping in RVL double buffer mode and related registers ADCIMDRI and
ADCEOLRI 415
9.9.7 Conversion flow control application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
9.9.8 Continuous Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419
9.9.9 Triggered Conversion — Single CSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420
9.9.10 Fully Timing Controlled Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421
Chapter 10
Supply Voltage Sensor - (BATSV3)
10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423
10.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423
10.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423
10.1.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424
10.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424
10.2.1 VSUP — Voltage Supply Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424
10.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425
10.3.1 Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425
10.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425
10.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429
10.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429
10.4.2 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429
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Chapter 11
Timer Module (TIM16B4CV3) Block Description
11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433
11.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433
11.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433
11.1.3 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434
11.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434
11.2.1 IOC3 - IOC0 — Input Capture and Output Compare Channel 3-0 . . . . . . . . . . . . . . . . 435
11.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435
11.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435
11.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435
11.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 447
11.4.1 Prescaler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 448
11.4.2 Input Capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449
11.4.3 Output Compare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449
11.5 Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450
11.6 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450
11.6.1 Channel [3:0] Interrupt (C[3:0]F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450
11.6.2 Timer Overflow Interrupt (TOF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450
Chapter 12
Timer Module (TIM16B2CV3) Block Description
12.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451
12.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451
12.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451
12.1.3 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 452
12.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 452
12.2.1 IOC1 - IOC0 — Input Capture and Output Compare Channel 1-0 . . . . . . . . . . . . . . . . 452
12.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453
12.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453
12.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453
12.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465
12.4.1 Prescaler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 466
12.4.2 Input Capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 467
12.4.3 Output Compare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 467
12.5 Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468
12.6 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468
12.6.1 Channel [1:0] Interrupt (C[1:0]F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468
12.6.2 Timer Overflow Interrupt (TOF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468
Chapter 13
Freescale’s Scalable Controller Area Network (S12MSCANV3)
13.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 469
13.1.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470
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13.1.2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470
13.1.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471
13.1.4 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471
13.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472
13.2.1 RXCAN — CAN Receiver Input Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472
13.2.2 TXCAN — CAN Transmitter Output Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472
13.2.3 CAN System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472
13.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473
13.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473
13.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475
13.3.3 Programmers Model of Message Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495
13.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506
13.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506
13.4.2 Message Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506
13.4.3 Identifier Acceptance Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 509
13.4.4 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515
13.4.5 Low-Power Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517
13.4.6 Reset Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521
13.4.7 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521
13.5 Initialization/Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523
13.5.1 MSCAN initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523
13.5.2 Bus-Off Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523
Chapter 14
Programmable Trigger Unit (PTUV3)
14.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525
14.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525
14.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526
14.1.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527
14.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527
14.2.1 PTUT0 — PTU Trigger 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527
14.2.2 PTUT1 — PTU Trigger 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527
14.2.3 PTURE — PTUE Reload Event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 528
14.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 528
14.3.1 Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 528
14.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 530
14.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546
14.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546
14.4.2 Memory based trigger event list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 548
14.4.3 Reload mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549
14.4.4 Async reload event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549
14.4.5 Interrupts and error handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550
14.4.6 Debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 551
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Chapter 15
Pulse Width Modulator with Fault Protection (PMF15B6CV4)
15.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 554
15.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 554
15.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 555
15.1.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556
15.2 Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 557
15.2.1 PWM0–PWM5 Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 557
15.2.2 FAULT0–FAULT5 Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 557
15.2.3 IS0–IS2 Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 557
15.2.4 Global Load OK Signal — glb_ldok . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 557
15.2.5 Commutation Event Signal — async_event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 557
15.2.6 Commutation Event Edge Select Signal — async_event_edge_sel[1:0] . . . . . . . . . . . 558
15.2.7 PWM Reload Event Signals — pmf_reloada,b,c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 558
15.2.8 PWM Reload-Is-Asynchronous Signal — pmf_reload_is_async . . . . . . . . . . . . . . . . . 558
15.3 Memory Map and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 559
15.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 559
15.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 564
15.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591
15.4.1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591
15.4.2 Prescaler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 592
15.4.3 PWM Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 592
15.4.4 Independent or Complementary Channel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 596
15.4.5 Deadtime Generators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597
15.4.6 Top/Bottom Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599
15.4.7 Asymmetric PWM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605
15.4.8 Variable Edge Placement PWM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 606
15.4.9 Double Switching PWM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 607
15.4.10Output Polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 609
15.4.11Software Output Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 609
15.4.12PWM Generator Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612
15.4.13Fault Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617
15.5 Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 619
15.6 Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 619
15.7 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 620
15.8 Initialization and Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 620
15.8.1 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 620
15.8.2 BLDC 6-Step Commutation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 621
Chapter 16
Serial Communication Interface (S12SCIV6)
16.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625
16.1.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625
16.1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 626
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16.1.3 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 627
16.1.4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 627
16.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 628
16.2.1 TXD — Transmit Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 628
16.2.2 RXD — Receive Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 628
16.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 628
16.3.1 Module Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 628
16.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 629
16.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 642
16.4.1 Infrared Interface Submodule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 643
16.4.2 LIN Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 643
16.4.3 Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 644
16.4.4 Baud Rate Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 645
16.4.5 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 646
16.4.6 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 651
16.4.7 Single-Wire Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 659
16.4.8 Loop Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 660
16.5 Initialization/Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 660
16.5.1 Reset Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 660
16.5.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 661
16.5.3 Interrupt Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 661
16.5.4 Recovery from Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 664
16.5.5 Recovery from Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 664
Chapter 17
Serial Peripheral Interface (S12SPIV5)
17.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665
17.1.1 Glossary of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665
17.1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665
17.1.3 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665
17.1.4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666
17.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667
17.2.1 MOSI — Master Out/Slave In Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667
17.2.2 MISO — Master In/Slave Out Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667
17.2.3 SS — Slave Select Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 668
17.2.4 SCK — Serial Clock Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 668
17.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 668
17.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 668
17.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 669
17.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 677
17.4.1 Master Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 678
17.4.2 Slave Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 679
17.4.3 Transmission Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 680
17.4.4 SPI Baud Rate Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 685
17.4.5 Special Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 686
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17.4.6 Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 687
17.4.7 Low Power Mode Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 688
Chapter 18
Gate Drive Unit (GDU)
18.1 Differences GDUV4 vs GDUV5 vs GDUV6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 691
18.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 692
18.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 692
18.1.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 694
18.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695
18.2.1 HD — High-Side Drain Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695
18.2.2 VBS[2:0] — Bootstrap Capacitor Connection Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . 695
18.2.3 HG[2:0] — High-Side Gate Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695
18.2.4 HS[2:0] — High-Side Source Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695
18.2.5 VLS[2:0] — Voltage Supply for Low-Side Pre-Drivers . . . . . . . . . . . . . . . . . . . . . . . . 695
18.2.6 LG[2:0] — Low-Side Gate Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695
18.2.7 LD[2:0] — Low-Side Gate Pins (only on GDUV6) . . . . . . . . . . . . . . . . . . . . . . . . . . . 695
18.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 697
18.3.1 Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 697
18.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 698
18.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 717
18.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 717
18.4.2 Low-Side FET Pre-Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 718
18.4.3 High-Side FET Pre-Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 718
18.4.4 Charge Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 720
18.4.5 Desaturation Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 722
18.4.6 Phase Comparators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 724
18.4.7 Fault Protection Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 725
18.4.8 Current Sense Amplifier and Overcurrent Comparator . . . . . . . . . . . . . . . . . . . . . . . . . 729
18.4.9 GDU DC Link Voltage Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 729
18.4.10Boost Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 730
18.4.11Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 731
18.5 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 732
18.5.1 FET Pre-Driver Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 732
18.5.2 GDU Intrinsic Dead Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 733
18.5.3 Calculation of Bootstrap Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 735
Chapter 19
LIN/HV Physical Layer (S12LINPHYV3)
19.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 737
19.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 738
19.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 738
19.1.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 739
19.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 741
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19.2.1 LIN — LIN Bus Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 741
19.2.2 LGND — LIN Ground Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 741
19.2.3 VLINSUP — Positive Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 741
19.2.4 LPTxD — LIN Transmit Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 741
19.2.5 LPRxD — LIN Receive Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 741
19.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 741
19.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 741
19.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 743
19.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 749
19.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 749
19.4.2 Slew Rate and LIN Mode Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 749
19.4.3 Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750
19.4.4 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 753
19.5 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 756
19.5.1 Module Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 756
19.5.2 Interrupt handling in Interrupt Service Routine (ISR) . . . . . . . . . . . . . . . . . . . . . . . . . . 756
Chapter 20
Flash Module (S12ZFTMRZ)
20.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 759
20.1.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 760
20.1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 760
20.1.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 761
20.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 763
20.3 Memory Map and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 764
20.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 764
20.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 768
20.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 788
20.4.1 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 788
20.4.2 IFR Version ID Word . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 788
20.4.3 Flash Block Read Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 788
20.4.4 Internal NVM resource . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 789
20.4.5 Flash Command Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 789
20.4.6 Allowed Simultaneous P-Flash and EEPROM Operations . . . . . . . . . . . . . . . . . . . . . . 794
20.4.7 Flash Command Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 795
20.4.8 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 811
20.4.9 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 812
20.4.10Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 812
20.5 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 812
20.5.1 Unsecuring the MCU using Backdoor Key Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . 813
20.5.2 Unsecuring the MCU in Special Single Chip Mode using BDM . . . . . . . . . . . . . . . . . 813
20.5.3 Mode and Security Effects on Flash Command Availability . . . . . . . . . . . . . . . . . . . . . 813
20.6 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 814
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Chapter 21
CAN Physical Layer (S12CANPHYV3)
21.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 815
21.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 815
21.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 816
21.1.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 816
21.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 817
21.2.1 CANH — CAN Bus High Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818
21.2.2 CANL — CAN Bus Low Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818
21.2.3 SPLIT — CAN Bus Termination Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818
21.2.4 VDDC — Supply Pin for CAN Physical Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818
21.2.5 VSSC — Ground Pin for CAN Physical Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818
21.3 Internal Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818
21.3.1 CPTXD — TXD Input to CAN Physical Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818
21.3.2 CPRXD — RXD Output of CAN Physical Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818
21.4 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 819
21.4.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 819
21.4.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 820
21.5 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 827
21.5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 827
21.5.2 Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 827
21.5.3 Configurable Wake-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 829
21.5.4 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 830
21.6 Initialization/Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 831
21.6.1 Initialization Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 831
21.6.2 Wake-up Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 832
21.6.3 Bus Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 832
21.6.4 CPTXD-Dominant Timeout Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 833
Chapter 22
Pulse-Width Modulator (S12PWM8B8CV2)
22.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 835
22.1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 835
22.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 835
22.1.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 836
22.2 External Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 836
22.2.1 PWM7 - PWM0 — PWM Channel 7 - 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 837
22.3 Memory Map and Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 837
22.3.1 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 837
22.3.2 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 837
22.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 852
22.4.1 PWM Clock Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 852
22.4.2 PWM Channel Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 855
22.5 Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 863
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22.6 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 864
Appendix A
MCU Electrical Specifications
A.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 865
Appendix B
CPMU Electrical Specifications (VREG, OSC, IRC, PLL)
B.1 VREG Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 885
B.2 Reset and Stop Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 887
B.3 IRC and OSC Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 888
B.4 Phase Locked Loop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 888
Appendix C
ADC Electrical Specifications
C.1 ADC Operating Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 891
Appendix D
LIN/HV PHY Electrical Specifications
D.1 Static Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 897
D.2 Dynamic Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 898
Appendix E
GDU Electrical Specifications
E.1 GDU specifications for devices featuring GDU V4 or V6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 901
E.2 Preliminary GDU specifications for devices featuring GDU V5 . . . . . . . . . . . . . . . . . . . . . . . . . 903
Appendix F
NVM Electrical Parameters
F.1 NVM Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 907
F.2 NVM Reliability Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914
F.3 NVM Factory Shipping Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914
Appendix G
BATS Electrical Specifications
G.1 Static Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 915
G.2 Dynamic Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 916
Appendix H
S12CANPHY Electrical Specifications
H.1 Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 917
H.2 Static Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 917
H.3 Dynamic Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 920
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Appendix I
SPI Electrical Specifications
I.1 Master Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 923
Appendix J
MSCAN Electrical Specifications
J.1 MSCAN Wake-up Pulse Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 927
Appendix K Package Information
K.1 48LQFP-EP Mechanical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 929
K.2 64LQFP-EP Mechanical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 932
K.3 80LQFP-EP Mechanical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 935
Appendix L
Ordering Information
Appendix M
Detailed Register Address Map
M.1 0x0000–0x0003 Part ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 941
M.2 0x0010–0x001F S12ZINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 942
M.3 0x0070-0x00FF S12ZMMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 942
M.4 0x0100-0x017F S12ZDBG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 943
M.5 0x0200-0x02FF PIM (See footnotes for part specific information) . . . . . . . . . . . . . . . . . . . . . . . 947
M.6 0x0380-0x039F FTMRZ128K512 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 953
M.7 0x03C0-0x03CF SRAM_ECC_32D7P. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 955
M.8 0x0400-0x042F TIM1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 956
M.9 0x0480-0x04AF PWM0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 957
M.10 0x0500-x053F PMF15B6C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 959
M.11 0x0580-0x059F PTU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 963
M.12 0x05C0-0x05FF TIM0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 965
M.13 0x0600-0x063F ADC0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 967
M.14 0x0640-0x067F ADC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 969
M.15 0x06A0-0x06BF GDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 971
M.16 0x06C0-0x06DF CPMU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 972
M.17 0x06F0-0x06F7 BATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 974
M.18 0x0700-0x0707 SCI0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 974
M.19 0x0710-0x0717 SCI1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 975
M.20 0x0780-0x0787 SPI0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 976
M.21 0x0800–0x083F CAN0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 976
M.22 0x0980-0x0987 LINPHY0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 978
M.23 0x0990-0x0997 CANPHY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 978
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Chapter 1
Device Overview MC9S12ZVM-Family
Table 1-1. Revision History
1.1 Introduction
The MC9S12ZVM-Family is an automotive 16-bit microcontroller family using the NVM + UHV
technology that offers the capability to integrate 40 V analog components. This family reuses many
features from the existing S12/S12X portfolio. The particular differentiating features of this family are the
enhanced S12Z core, the combination of dual-ADC synchronized with PWM generation and the
integration of “high-voltage” analog modules, including the voltage regulator (VREG), Gate Drive Unit
(GDU), and either Local Interconnect Network (LIN) physical layer or CAN Physical layer . These features
enable a fully integrated single chip solution to drive up to 6 external power MOSFETs for BLDC or
PMSM motor drive applications.
The MC9S12ZVM-Family includes error correction code (ECC) on RAM and flash memory, EEPROM
for diagnostic or data storage, a fast analog-to-digital converter (ADC) and a frequency modulated phase
locked loop (IPLL) that improves the EMC performance. The MC9S12ZVM-Family allows the
integration of several key system components into a single device, optimizing system architecture and
achieving significant space savings. The MC9S12ZVM-Family delivers all the advantages and
efficiencies of a 16-bit MCU while retaining the low cost, power consumption, EMC, and code-size
efficiency advantages currently enjoyed by users of existing S12(X) families. The MC9S12ZVM-Family
is available in different pin-out options, using 80-pin, 64-pin and 48-pin LQFP-EP packages to
accommodate LIN, CAN and external PWM based application interfaces. In addition to the I/O ports
available in each module, further I/O ports are available with interrupt capability allowing wake-up from
stop or wait modes.
The MC9S12ZVM-Family is a general-purpose family of devices suitable for a range of applications,
including:
3-phase sensorless BLDC motor control for
Fuel pump
Version
Number
Revision
Date
Sections
Affected Description of Changes
1.7 26.Feb.2014 Section 1.2.1
Tab l e 1- 6
General
Section 1.7.4
Added S12ZVM32 and S12ZVM16 information to derivative table
Updated PartID Table
Added HVPHY feature for S12ZVM32 and S12ZVM16
Added 48LQFP-EP for S12ZVM32 and S12ZVM16
1.8 04.Sep.2014 Section 1.2.1 Added S12ZVML31 information to derivative table
2.0 10.Oct.2014 General Added ZVMC256 information
2.01 06.Feb.2015 General Added 2N95G maskset information.
Added TIM1 for ZVMC256
Chapter 1 Device Overview MC9S12ZVM-Family
MC9S12ZVM Family Reference Manual Rev. 2.2
22 Freescale Semiconductor
Water pump
Oil pump
A/C compressor
HVAC blower
Engine cooling fan
Electric vehicle battery cooling fan
Brush DC motor control requiring driving in 2 directions, along with PWM control for
Reversible wiper
Trunk opener
1.2 Features
This section describes the key features of the MC9S12ZVM-Family. It documents the superset of features
within the family. Some module versions differ from one part to another within the family. Section 1.2.1
MC9S12ZVM-Family Member Comparison provides information to help access the correct information
for a particular part within the family.
1.2.1 MC9S12ZVM-Family Member Comparison
Table 1-2 provides a summary of feature set differences within the MC9S12ZVM-Family.
Table 1-2. S12ZVM Family Feature Set Differences
Feature ZVMC256 ZVML128 ZVMC128 ZVML64 ZVMC64 ZVML32 ZVML31 ZVML31 ZVM32 ZVM32 ZVM16 ZVM16
Flash 256 KB 128 KB 128 KB 64 KB 64 KB 32 KB 32 KB 32 KB 32 KB 32 KB 16 KB 16 KB
EEPROM 1 KB 512 Bytes 512 Bytes 512
Bytes
512
Bytes
512
Bytes
128
Bytes
128
Bytes
128
Bytes
128
Bytes
128
Bytes
128
Bytes
RAM 32 KB 8 KB 8 KB 4 KB 4 KB 4 KB 4 KB 4 KB 4 KB 4 KB 2 KB 2 KB
Package 80 pin 64 pin 64 pin 64 pin 64 pin 64 pin 64 pin 48 pin 64 pin 48 pin 64 pin 48 pin
LINPHY 1 1–111––––
HVPHY –––––1111
SCI(1) 2 2 2 222222222
SPI 1 1 1 111101010
ADC
channels
8+8 4+5 4+5 4+5 4+5 4+5 4+5 1+3 4+5 1+3 4+5 1+3
PMF
channels
6 6 6 666666666
TIM
channels
4 TIM0 +
2 TIM1
4 4 444434343
PWM
channels
8 –––––––––
MSCAN 1 1 1 1 1 1 ––––
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1.2.2 Module Version Differences Within The S12ZVM Family
Table 1-3 provides a summary of module version differences within the MC9S12ZVM-Family. The
differences between the module versi ons are summarized in the individual module chapters. Modules that
are not listed in this table have identical versions across all MC9S12ZVM-Family members.
CAN
VREG
1 1 –1–––––––
CANPHY1 –––––––––
External
FET gate
charge(nC)
Standard + 50% Standard
GDU
external
bootstrap
diode
Needed Needed Needed Needed Needed Needed Not
Needed
Not
Needed
Not
Needed
Not
Needed
Not
Needed
Not
Needed
Current
sense
op-amps
2 2 2 222212121
Auxiliary
tracker
VREGs
2 –––––––––
1. Options featuring a single SCI include the SCI1 instantiation.
Table 1-3. S12ZVM Module Version Table
Feature ZVMC256 ZVML128 ZVMC128 ZVML64 ZVMC64 ZVML32 ZVML31 ZVM32 ZVM16
PIM V3V2V2V2V2V2V2V2V2
CPMU_UHVV10V6V6V6V6V6V6V6V6
PMF V4V3V3V3V3V3V4V4V4
GDU V6 V4(1)
1. Mask set differences listed in Section 1.2.3
V4 1 V4 1 V4 1 V4 1 V5 V5 V5
DBG V4 V2 V2 V2 V2 V2 V3 (Lite) V3 (Lite) V3 (Lite)
ADC V3 V1 V1 V1 V1 V1 V1 V1 V1
Table 1-2. S12ZVM Family Feature Set Differences
Feature ZVMC256 ZVML128 ZVMC128 ZVML64 ZVMC64 ZVML32 ZVML31 ZVML31 ZVM32 ZVM32 ZVM16 ZVM16
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24 Freescale Semiconductor
1.2.3 Functional Differences Between Masksets 0N95G, 1N95G, 2N95G
The parts ZVML128, ZVMC128, ZVML64, ZVMC64 and ZVML32 have the following maskset options.
CAUTION
The maskset 2N95G uses the VSUP pin as the LINPHY supply. Thus the BST function must
not be used on this maskset because enabling it could cause a LINPHY supply voltage
offset with respect to other devices on the LIN bus.
1.3 Chip-Level Features
On-chip modules available within the family include the following features:
S12Z CPU core
256, 128, 64, 32 or 16KB on-chip flash with ECC
1K, 512 or 128 byte EEPROM with ECC
32, 8, 4 or 2 KB on-chip SRAM with ECC
Phase locked loop (IPLL) frequency multiplier with internal filter
1 MHz internal RC oscillator with +/-1.3% accuracy over rated temperature range
4-20MHz amplitude controlled pierce oscillator
Internal COP (watchdog) module
6-channel, 15-bit pulse width modulator with fault protection (PMF)
Low side and high side FET pre-drivers for each phase
Gate drive pre-regulator
LDO (Low Dropout Voltage Regulator) (typically 11V)
High side gate supply generated using bootstrap circuit with external diode and capacitor
Sustaining charge pump with two external capacitors and diodes
High side drain (HD) monitoring on internal ADC channel using HD/5 voltage
Two parallel analog-to-digital converters (ADC) with 12-bit resolution and up to 16 channels
available on external pins
Programmable Trigger Unit (PTU) for synchronization of PMF and ADC
One serial peripheral interface (SPI) module
Table 1-4. N95G Option Table
Feature 0N95G 1N95G 2N95G
LINPHY supply pin HD HD VSUP
BST pin function Available Available Not Available
GDU low side driver state in HD over-voltage case on GOCA1 GOCA1
GDU HD nominal over-voltage time constant 300ns 2.7us 2.7us
GDU GSUF bit state one clock cycle after reset 1 1 0
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One serial communication interface (SCI) module with interface to internal LIN physical layer
transceiver (with RX connected to a timer channel for frequency calibration purposes, if desired)
Up to one additional SCI (not connected to LIN physical layer)
On-chip LIN physical layer transceiver fully compliant with the LIN 2.2 standard
(S12ZVML versions)
One High Voltage physical interface. (ZVM32, ZVM16 versions only)
4-channel timer module (TIM0) with input capture/output compare
2-channel timer module (TIM1) with input capture/output compare (ZVMC256 version only)
One 8-bit, 8-channel pulse width modulator (PWM) module. (ZVMC256 version only)
MSCAN (1 Mbit/s, CAN 2.0 A, B software compatible) module
On-chip voltage regulator (VREG) for regulation of input supply and all internal voltages
Optional VREG ballast control output to supply an external CAN physical layer
CAN Physical Layer, ISO 11898-2 and ISO 11898-5 compliant. (ZVMC256 version only)
Two voltage regulator outputs to supply external loads. (ZVMC256 version only)
Two current sense circuits for overcurrent detection or torque measurement
Autonomous periodic interrupt (API)
20mA high-current output for use as Hall sensor supply
Supply voltage sense with low battery warning
Chip temperature sensor
One High Voltage Input (ZVMC256 version only)
1.4 Module Features
The following sections provide more details of the integrated modules.
1.4.1 S12Z Central Processor Unit (CPU)
The S12Z CPU is a revolutionary high-speed core, with code size and execution efficiencies over the S12X
CPU. The S12Z CPU also provides a linear memory map eliminating the inconvenience and performance
impact of page swapping.
Harvard Architecture - parallel data and code access
3 stage pipeline
32-Bit wide instruction and databus
32-Bit ALU
24-bit addressing, of 16MB linear address space
Instructions and Addressing modes optimized for C-Programming & Compiler
MAC unit 32bit += 32bit*32bit
Hardware divider
Single cycle multi-bit shifts (Barrel shifter)
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Special instructions for fixed point math
Unimplemented opcode traps
Unprogrammed byte value (0xFF) defaults to SWI instruction
1.4.1.1 Background Debug Controller (BDC)
Background debug controller (BDC) with single-wire interface
Non-intrusive memory access commands
Supports in-circuit programming of on-chip nonvolatile memory
1.4.1.2 Debugger (DBG)
ZVML31, ZVM32, ZVM16 feature subset listed in S12ZDBG chapter
Enhanced DBG module including:
Four comparators (A, B, C and D) each configurable to monitor PC addresses or addresses of
data accesses
A and C compare full address bus and full 32-bit data bus with data bus mask register
B and D compare full address bus only
Three modes: simple address/data match, inside address range, or outside address range
Tag-type or force-type hardware breakpoint requests
State sequencer control
64 x 64-bit circular trace buffer to capture change-of-flow addresses or address and data of every
access
Begin, End and Mid alignment of tracing to trigger
Profiling mode for external visibility of internal program flow
1.4.2 Embedded Memory
1.4.2.1 Memory Access Integrity
Illegal address detection
ECC support on embedded NVM and system RAM
1.4.2.2 Flash
On-chip flash memory on the MC9S12ZVM-family on the features the following:
Up to 256KB of program flash memory
32 data bits plus 7 syndrome ECC (error correction code) bits allow single bit fault correction
and double fault detection
Erase sector size 512 bytes
Automated program and erase algorithm
User margin level setting for reads
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Protection scheme to prevent accidental program or erase
1.4.2.3 EEPROM
Up to 1K byte EEPROM
16 data bits plus 6 syndrome ECC (error correction code) bits allow single bit error correction
and double fault detection
Erase sector size 4 bytes
Automated program and erase algorithm
User margin level setting for reads
1.4.2.4 SRAM
Up to 32 KB of general-purpose RAM with ECC
Single bit error correction and double bit error detection
1.4.3 Clocks, Reset & Power Management Unit (CPMU)
Real time interrupt (RTI)
Clock monitor, supervising the correct function of the oscillator (CM)
Computer operating properly (COP) watchdog
Configurable as window COP for enhanced failure detection
Can be initialized out of reset using option bits located in flash memory
System reset generation
Autonomous periodic interrupt (API) (combination with cyclic, watchdog)
Low Power Operation
RUN mode is the main full performance operating mode with the entire device clocked.
WAIT mode when the internal CPU clock is switched off, so the CPU does not execute
instructions.
Pseudo STOP - system clocks are stopped but the oscillator the R TI, the COP, and API modules
can be enabled
STOP - the oscillator is stopped in this mode, all clocks are switched off and all counters and
dividers remain frozen, with the exception of the COP and API which can optionally run from
ACLK.
1.4.3.1 Internal Phase-Locked Loop (IPLL)
Phase-locked-loop clock frequency multiplier
No external components required
Reference divider and multiplier allow large variety of clock rates
Automatic bandwidth control mode for low-jitter operation
Automatic frequency lock detector
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Configurable option to spread spectrum for reduced EMC radiation (frequency modulation)
Reference clock sources:
Internal 1 MHz RC oscillator (IRC)
External 4-20 MHz crystal oscillator/resonator
1.4.3.2 Internal RC Oscillator (IRC)
Trimmable internal 1MHz reference clock.
Trimmed accuracy over -40C to 150C junction temperature range: 1.3%max.
1.4.4 Main External Oscillator (XOSCLCP)
Amplitude controlled Pierce oscillator using 4 MHz to 20 MHz crystal
Current gain control on amplitude output
Signal with low harmonic distortion
Low power
Good noise immunity
Eliminates need for external current limiting resistor
Trans conductance sized for optimum start-up margin for typical crystals
Oscillator pins shared with GPIO functionality
1.4.5 Timer (TIM0)
4 x 16-bit channels Timer module for input capture or output compare
16-bit free-running counter with 8-bit precision prescaler
1.4.6 Timer (TIM1) (ZVMC256 only)
2 x 16-bit channels Timer module for input capture or output compare
16-bit free-running counter with 8-bit precision prescaler
1.4.7 Pulse width Modulator with Fault protection (PMF)
6 x 15-bit channel PWM resolution
Each pair of channels can be combined to generate a PWM signal (with independent control of
edges of PWM signal)
Dead time insertion available for each complementary pair
Center-aligned or edge-aligned outputs
Programmable clock select logic with a wide range of frequencies
Programmable fault detection
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1.4.8 Programmable Trigger Unit (PTU)
Enables synchronization between PMF and ADC
2 trigger input sources and software trigger source
2 trigger outputs
One 16-bit delay register pre-trigger output
Operation in One-Shot or Continuous modes
1.4.9 LIN physical layer transceiver (ZVML devices only)
Compliant with LIN Physical Layer 2.2 specification.
Compliant with the SAE J2602-2 LIN standard.
Standby mode with glitch-filtered wake-up.
Slew rate selection optimized for the baud rates: 10.4kBit/s, 20kBit/s and Fast Mode (up to
250kBit/s).
Switchable 34k/330k pull-ups (in shutdown mode, 330k only)
Current limitation for LIN Bus pin falling edge.
Over-current protection.
LIN TxD-dominant timeout feature monitoring the LPTxD signal.
Automatic transmitter shutdown in case of an over-current or TxD-dominant timeout.
Fulfills the OEM “Hardware Requirements for LIN (CAN and FlexRay) Interfaces in Automotive
Applications” v1.3.
1.4.10 Serial Communication Interface Module (SCI)
Full-duplex or single-wire operation
Standard mark/space non-return-to-zero (NRZ) format
Selectable IrDA 1.4 return-to-zero-inverted (RZI) format with programmable pulse widths
16-bit baud rate selection
Programmable character length
Programmable polarity for transmitter and receiver
Active edge receive wakeup
Break detect and transmit collision detect supporting LIN
1.4.11 Multi-Scalable Controller Area Network (MSCAN)
Implementation of the CAN protocol — Version 2.0A/B
Five receive buffers with FIFO storage scheme
Three transmit buffers with internal prioritization using a “local priority” concept
Flexible maskable identifier filter supports two full-size (32-bit) extended identifier filters, or four
16-bit filters, or either 8-bit filters
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Programmable wake-up functionality with integrated low-pass filter
1.4.12 Serial Peripheral Interface Module (SPI)
Configurable 8- or 16-bit data size
Full-duplex or single-wire bidirectional
Double-buffered transmit and receive
Master or slave mode
MSB-first or LSB-first shifting
Serial clock phase and polarity options
1.4.13 Analog-to-Digital Converter Module (ADC)
Dual ADC
12-bit resolution
Up to 16 external channels & 8 internal channels
2.5us for single 12-bit resolution conversion
Left or right aligned result data
Continuous conversion mode
Programmers model with list based command and result storage architecture
ADC directly writes results to RAM, preventing stall of further conversions
Internal signals monitored with the ADC module
VRH, VRL, (VRL+VRH)/2, Vsup monitor, Vbg, TempSense, GDU phase, GDU DC-link
External pins can also be used as digital I/O
1.4.14 Supply Voltage Sensor (BATS)
Monitoring of supply (VSUP) voltage
Internal ADC interface from an internal resistive divider
Generation of low or high voltage interrupts
1.4.15 On-Chip Voltage Regulator system (VREG)
Voltage regulator
Linear voltage regulator directly supplied by VSUP
Low-voltage detect on VSUP
Power-on reset (POR)
Low-voltage reset (LVR) for VDDX domain
External ballast device support to reduce internal power dissipation
Capable of supplying both the MCU internally plus external components
Over-temperature interrupt
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Internal voltage regulator
Linear voltage regulator with bandgap reference
Low-voltage detect on VDDA
Power-on reset (POR) circuit
Low-voltage reset for VDD domain
Package option for VREG ballast control output to supply external CANPHY
Option for 2 further VREG ballast control outputs to supply external components (ZVMC256)
1.4.16 Gate Drive Unit (GDU)
Low side and high side FET pre-drivers for each phase
Gate drive pre-regulator LDO (Low Dropout Voltage Regulator)
High side gate supply done via bootstrap circuit
External bootstrap diode replaced by internal circuit (GDUV5 only)
Sustaining charge pump with two external capacitors and diodes
Optional boost converter configuration with voltage feedback
FET-Predriver desaturation and error recognition
Monitoring of FET High Side drain (HD) voltage
Diagnostic failure management
Low side drain pins for monitoring desaturation of switch reluctance motor drivers (ZVMC256)
1.4.17 Current Sense
2 channel, integrated op-amp functionality
1.4.18 High Voltage Physical Interface (ZVM32, ZVM16)
Single pin high voltage interface signal operating in the VSUP voltage range
Internal interface mapped to internal timer channel.
Compliant with the ISO9141 (K-line) standard.
Standby mode with glitch-filtered wake-up.
Slew rate selection optimized for: 5.2 kHz, 10 kHz and Fast Mode (up to 125 kHz).
Switchable 34 k/330 k pullup resistors (in shutdown mode, 330 konly
Current limitation for pin falling edge.
Overcurrent protection.
1.4.19 CAN Physical Layer Module (ZVMC256 only)
High speed CAN interface for baud rates of up to 1 Mbit/s
ISO 11898-2 and ISO 11898-5 compliant for 12 V battery systems
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32 Freescale Semiconductor
SPLIT pin driver for bus recessive level stabilization
Low power mode with remote CAN wake-up handled by MSCAN module
Configurable wake-up pulse filtering
Over-current shutdown for CANH and CANL
Voltage monitoring on CANH and CANL
CPTXD-dominant timeout feature monitoring the CPTXD signal
Fulfills the OEM “Hardware Requirements for (LIN,) CAN (and FlexRay) Interfaces in
Automotive Applications” v1.3
1.4.20 Pulse Width Modulation Module (PWM) (ZVMC256 only)
Configurable as 8 channels x 8-bit or 4 channels x 16-bit
Programmable period and duty cycle per channel
Center-aligned or edge-aligned outputs
Programmable clock select logic with a wide range of frequencies
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Freescale Semiconductor 33
1.5 Block Diagram
Figure 1-1. MC9S12ZVM-Family Block Diagram
2K, 4K, 8K, 32KB RAM with ECC
RESET
EXTAL
XTAL
1K, 512 bytes EEPROM with ECC
BKGD
VSUP
Real Time Interrupt
Clock Monitor
Background
TEST
Debug Controller
ADC0
Interrupt Module
SCI1
PS0
PS1
PTS / KWS
AN0_[7:0]
PAD[7:0]
12-bit
16-bit 4-Channel Timer
TIM0
Asynchronous Serial IF
15-bit 6 channel
Pulse Width Modulator
PMF
32K, 64K, 128K, 256KB Flash with ECC
S12ZCPU
COP Watchdog
PLL with Frequency
Modulation option
Debug Module
4 Comparators
Trace Buffer
Reset Generation
and Test Entry
RXD1
TXD1
Auton. Periodic Int. PT3
PT0
PT1
PT2
PTT
PP0
PP1
PP2
PTP / KWP
IOC0_3
IOC0_0
IOC0_1
IOC0_2
VSS1
Low Power Pierce
Oscillator
SCI0
Asynchronous Serial IF
RXD0
TXD0
MOSI0
SS0
SCK0
MISO0
SPI0
Synchronous Serial IF
PS2
PS3
PS4
PS5
Voltage Regulator
(Nominal 12V)
Block Diagram shows the maximum configuration
Not all pins or all peripherals are available on all devices and packages. Red highlighted features are ZVMC256 specific.
Rerouting options are not shown.
PE0
PTE
PE1
PTAD / KWAD
Analog-Digital Converter
Internal RC Oscillator
PWM1_0
LIN0
LINPHY0 (S12ZVML versions only)
LIN0
LGND
BATS
Voltage Supply Monitor
LGND
ADC1 AN1_[7:0]
12-bit
Analog-Digital Converter
PAD[15:8]
PWM1_1
PWM1_2
BDC
DBG
BCTL
CAN0
msCAN 2.0B
RXCAN0
TXCAN0
Current Sense Circuits
AMPP1
AMPM1
AMP1
VDDX1/VDDX2
VDD
VDDF
PTU
Programmable Trigger PTUT0
Unit PTUT1
PTURE
PWM1_3
PWM1_4
PWM1_5
VSS2
VRH
VRL
VRH
VRL
GDU
Gate Drive Unit
VBS[2:0]
HG[2:0]
HS[2:0]
VLS[2:0]
LG[2:0]
LS[2:0]
CP
VCP
VLS_OUT
VBS[2:0]
HG[2:0]
HS[2:0]
VLS[2:0]
LG[2:0]
LS[2:0]
CP
VCP
VLS_OUT
BST
VSSB
BST
VSSB
HD
HD
AMPP0
AMPM0
AMP0
VDDA/VSSA
5V Analog Supply
HV Physical Interface
OR
CANH0
CANPHY0
CANH0
VSSC VSSC
CANL0
CANL0
BCTLC
VDDC CAN VREG
PL0
PTL/KWL
High Voltage Input
HV0
PWM0
8-bit, 8-channel
Pulse Width Modulator
PWM0_[7,5,3,1]
Additional Voltage Regulator #1
BCTLS1
VDDS1
SNPS1
Additional Voltage Regulator #2
BCTLS2
VDDS2
SNPS2
LD[2:0]
LD[2:0]
SPLIT0
SPLIT0
16-bit 2-Channel Timer
TIM1 IOC1_0
IOC1_1
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34 Freescale Semiconductor
1.6 Device Memory Map
Table 1-5 shows the device register memory map. All modules that can be instantiated more than once on
S12 devices are listed with an index number, even if they are only instantiated once on this device family.
Table 1-5. Module Register Address Ranges
Address Module Size
(Bytes)
0x0000–0x0003 Part ID Register Section 1.6.2 4
0x0004–0x000F Reserved 12
0x0010–0x001F INT 1 6
0x0020–0x006F Reserved 80
0x0070–0x008F MMC 3 2
0x0090–0x00FF MMC Reserved 112
0x0100–0x017F DBG 128
0x0180–0x01FF Reserved 128
0x0200–0x033F PIM 320
0x0340–0x037F Reserved 64
0x0380–0x039F FTMRZ 32
0x03A0–0x03BF Reserved 32
0x03C0–0x03CF RAM ECC 16
0x03D0–0x03FF Reserved 48
0x0400–0x043F TIM1 (ZVMC256 only) 64
0x0440–0x047F Reserved 64
0x0480–0x04AF PWM0 (ZVMC256 only) 48
0x04B0–0x04FF Reserved(1) 80
0x0500–0x053F PMF 64
0x0540–0x057F Reserved 64
0x0580–0x059F PTU 32
0x05A0–0x05BF Reserved 32
0x05C0–0x05EF TIM0 48
0x05F0–0x05FF Reserved 1 6
0x0600–0x063F ADC0 6 4
0x0640–0x067F ADC1 64
0x0680–0x069F Reserved 32
(2)0x06A0–0x06BF GDU 32
0x06C0–0x06DF CPMU 32
0x06E0–0x06EF Reserved 16
0x06F0–0x06F7 BATS 8
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NOTE
Reserved register space shown above is not allocated to any module. This
register space is reserved for future use. Writing to these locations has no
effect. Read access to these locations returns zero.
1.6.1 Flash Module
This device family instantiates different flash modules, depending on derivative. The flash documentation
for the all devices is featured in the FTMRZ section.
0x06F8–0x06FF Reserved 8
0x0700–0x0707 SCI0 8
0x0708–0x070F Reserved 8
0x0710–0x0717 SCI1 8
0x0718–0x077F Reserved 104
0x0780–0x0787 SPI0 8
0x0788–0x07FF Reserved 120
0x0800–0x083F CAN0 64
0x0840–0x097F Reserved 320
0x0980–0x0987 LINPHY (S12ZVML derivatives) 8
0x0980–0x0987 HV Physical Interface
(S12ZVM32, S12ZVM16 derivatives)
8
0x0988–0x098F Reserved 8
0x0990–0x0997 CANPHY (ZVMC256 only) 8
0x0998–0x0FFF Reserved 1640
1. Reading from the first 16 locations in this reserved range returns undefined data
2. Address range = 0x0690-0x069F on Maskset N06E
Table 1-5. Module Register Address Ranges
Address Module Size
(Bytes)
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Figure 1-2. MC9S12ZVM-Family Global Memory Map. (See Table 1-3 for individual device details)
0x00_1000
0x00_0000
0x10_0000
0x1F_4000
0x80_0000
0xFF_FFFF
RAM
EEPROM
Unmapped
Program NVM
Register Space
4 KB
max. 1 MByte - 4 KB
max. 1 MByte - 48 KB
max. 8 MB
6 MByte
High address aligned
Low address aligned
0x1F_8000
Unmapped
address range
0x1F_C000
Reserved (read only) 6 KB
NVM IFR 256 Byte
Reserved 512 Byte
0x20_0000
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1.6.2 Part ID Assignments
The part ID is located in four 8-bit registers at addresses 0x0000-0x0003. The read-only value is a unique
part ID for each revision of the chip. Table 1-6 shows the assigned part ID number and mask set number.
1.7 Signal Description and Device Pinouts
This section describes signals that connect off-chip. It includes pin out diagrams a table of signal
properties, and detailed discussion of signals. Internal inter module signal mapping at device level is
described in 1.8 Internal Signal Mapping.
1.7.1 Pin Assignment Overview
Table 1-7 provides a summary of which ports are available.
Table 1-6. Assigned Part ID Numbers
Device Mask Set Number Part ID Option
MC9S12ZVMC256 N00R 0x00180000 CAN
MC9S12ZVML12 N06E 0x00170000 LIN
MC9S12ZVMC12 N06E 0x00170001 CAN-VREG
MC9S12ZVML12 0N95G 0x00172000 LIN
MC9S12ZVMC12 0N95G 0x00172001 CAN-VREG
MC9S12ZVML12 1N95G 0x00172100 LIN
MC9S12ZVML64 1N95G 0x00172100 LIN
MC9S12ZVML32 1N95G 0x00172100 LIN
MC9S12ZVMC12 1N95G 0x00172101 CAN-VREG
MC9S12ZVMC64 1N95G 0x00172101 CAN-VREG
MC9S12ZVML12 2N95G 0x00172200 LIN
MC9S12ZVML64 2N95G 0x00172200 LIN
MC9S12ZVML32 2N95G 0x00172200 LIN
MC9S12ZVML31 0N14N 0x00150000 LIN
MC9S12ZVM32 0N14N 0x00150000 HV Physical Interface
MC9S12ZVM16 0N14N 0x00150000 HV Physical Interface
Table 1-7. Port Availability by Option
Port 80 LQFP 64 LQFP 48LQFP
Port AD PAD[15:0] PAD[8:0] PAD[8],PAD[2:0]
Port E PE[1:0] PE[1:0] PE[1:0]
Port L PL[0] ——
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38 Freescale Semiconductor
NOTE
To avoid current drawn from floating inputs, all non-bonded pins should be
configured as output or configured as input with a pull up or pull down
device enabled
1.7.2 Detailed External Signal Descriptions
This section describes the properties of signals available at device pins. Signal names associated with
modules that can be instantiated more than once on an S12 are indexed, even if the module is only
instantiated once on the MC9S12ZVM-Family. If a signal already includes a ch annel number , then the index
is inserted before the channel number. Thus ANx_y corresponds to AN instance x, channel number y.
1.7.2.1 RESET — External Reset Signal
The RESET signal is an active low bidirectional control signal. It acts as an input to initialize the MCU to
a known start-up state, and an output when an internal MCU function causes a reset. The RESET pin has
an internal pull-up device.
1.7.2.2 TEST — Test Pin
This input only pin is reserved for factory test. This pin has an internal pull-down device.
NOTE
The TEST pin must be tied to ground in all applications.
1.7.2.3 MODC — Mode C Signal
The MODC signal is used as an MCU operating mode select during reset. The state of this signal is latched
to the MODC bit at the rising edge of RESET. The signal has an internal pull-up device.
1.7.2.4 PAD[15:0] / KWAD[15:0] — Port AD, Input Pins of ADC
These are general-purpose input or output signals. The signals can be configured on per signal basis as
interrupt inputs with wake-up capability (KWAD). These signals can have a pull-up or pull-down device
selected and enabled on per signal basis. During and out of reset the pull devices are disabled.
Port P PP[1:0] PP[2:0] PP[0]
Port S PS[3:0] PS[5:0] PS[1:0]
Port T PT[3:0] PT[3:0] PT[0]
sum of ports292410
Table 1-7. Port Availability by Option
Port 80 LQFP 64 LQFP 48LQFP
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Freescale Semiconductor 39
1.7.2.5 PE[1:0] — Port E I/O Signals
PE[1:0] are general-purpose input or output signals. The signals can have a pull-down device, enabled by
on a per pin basis. Out of reset the pull-down devices are enabled.
1.7.2.6 PL[0] — Port L Input Signal
PL[0] is a high voltage input port. The port can be configured as interrupt input with wake-up capability
(KWL[0]). The input voltage is also scaled and mapped to an internal ADC channel.
1.7.2.7 PP[2:0] / KWP[2:0] — Port P I/O Signals
PP[2:0] are general-purpose input or output signals. The signals can be configured on per signal basis as
interrupt inputs with wake-up capability (KWP[2:0]). They can have a pull-up or pull-down device
selected and enabled on per signal basis. During and out of reset the pull devices are disabled.
1.7.2.8 PS[5:0] / KWS[5:0] — Port S I/O Signals
PS[5:0] are general-purpose input or output signals. The signals can be configured on per signal basis as
interrupt inputs with wake-up capability (KWS[5:0]). They can have a pull-up or pull-down device
selected and enabled on per signal basis. During and out of reset the pull-up devices are enabled.
1.7.2.9 PT[3:0] — Port T I/O Signals
PT[3:0] are general-purpose input or output signals. They can have a pull-up or pull-down device selected
and enabled on per signal basis. During and out of reset the pull devices are disabled.
1.7.2.10 AN0_[7:0], AN1_[7:0]— ADC Input Signals
These are the analog inputs of the Analog-to-Digital Converters. These are mapped to PAD port pins. The
number of analog input channels connected to PAD port pins is package option dependent.
1.7.2.11 VRH0_[2:0], VRL0_[1:0] — ADC0 Reference Signals
VRH0_[2:0] and VRL0_[1:0] are the reference voltage signals for the analog-to-digital converter ADC0.
1.7.2.12 VRH1_[2:0], VRL1_[1:0] — ADC1 Reference Signals
VRH1_[2:0] and VRL1_[1:0] are the reference voltage signals for the analog-to-digital converter ADC1.
1.7.2.13 SPI0 Signals
1.7.2.13.1 SS0 Signal
This signal is associated with the slave select SS functionality of the serial peripheral interface SPI0.
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40 Freescale Semiconductor
1.7.2.13.2 SCK0 Signal
This signal is associated with the serial clock SCK functionality of the serial peripheral interface SPI0.
1.7.2.13.3 MISO0 Signal
This signal is associated with the MISO functionality of the serial peripheral interface SPI0. This signal
acts as master input during master mode or as slave output during slave mode.
1.7.2.13.4 MOSI0 Signal
This signal is associated with the MOSI functionality of the serial peripheral interface SPI0. This signal
acts as master output during master mode or as slave input during slave mode
1.7.2.14 SCI[1:0] Signals
1.7.2.14.1 RXD[1:0] Signals
These signals are associated with the receive functionality of the serial communication interfaces
(SCI[1:0]).
1.7.2.14.2 TXD[1:0] Signals
These signals are associated with the transmit functionality of the serial communication interfaces
(SCI[1:0]).
1.7.2.15 CAN0 Signals
1.7.2.15.1 RXCAN0 Signal
This signal is associated with the receive functionality of the scalable controller area network controller
(MSCAN0).
1.7.2.15.2 TXCAN0 Signal
This signal is associated with the transmit functionality of the scalable controller area network controller
(MSCAN0).
1.7.2.16 Timer IOC0_[3:0] Signals
The signals IOC0_[3:0] are associated with the input capture or output compare functionality of the timer
(TIM0) module.
1.7.2.17 Timer IOC1_[1:0] Signals (ZVMC256 only)
The signals IOC1_[1:0] are associated with the input capture or output compare functionality of the timer
(TIM1) module.
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Freescale Semiconductor 41
1.7.2.18 PWM1_[5:0] Signals
The signals PWM1_[5:0] are associated with the PMF module digital channel outputs.
1.7.2.19 PWM0_[7,5,3,1] Signals (ZVMC256 only)
The PWM0 signals are associated with the PWM0 module digital channel outputs.
1.7.2.20 PTU Signals
1.7.2.20.1 PTUT[1:0] Signals
These signals are the PTU trigger output signals. These signals are routed to pins for debugging purposes.
1.7.2.20.2 PTURE Signal
This signal is the PTU reload enable output signal. This signal is routed to a pin for debugging purposes.
1.7.2.21 Interrupt Signals — IRQ and XIRQ
IRQ is a maskable level or falling edge sensitive input. XIRQ is a non-maskable level-sensitive interrupt.
1.7.2.22 Oscillator and Clock Signals
1.7.2.22.1 Oscillator Pins — EXTAL and XTAL
EXTAL and XT AL are the crystal driver and external clock pins. On reset all the device clocks are derived
from the internal PLLCLK, independent of EXTAL and XTAL. XTAL is the oscillator output.
1.7.2.22.2 ECLK
This signal is associated with the output of the bus clock (ECLK).
NOTE
This feature is only intended for debug purposes at room temperature.
It must not be used for clocking external devices in an application.
1.7.2.23 BDC and Debug Signals
1.7.2.23.1 BKGD — Background Debug signal
The BKGD signal is used as a pseudo-open-drain signal for the background debug communication. The
BKGD signal has an internal pull-up device.
1.7.2.23.2 PDO — Profiling Data Output
This is the profiling data output signal used when the DBG module profiling feature is enabled. This signal
is output only and provides a serial, encoded data stream that can be used by external development tools
to reconstruct the internal CPU code flow.
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42 Freescale Semiconductor
1.7.2.23.3 PDOCLK — Profiling Data Output Clock
This is the PDO clock signal used when the DBG module profiling feature is enabled. This signal is output
only. During code profiling this is the clock signal that can be used by external development tools to
sample the PDO signal.
1.7.2.23.4 DBGEEV — External Event Input
This signal is the DBG external event input. It is input only. W ithin the DBG module, it allows an external
event to force a state sequencer transition, or trace buffer entry, or to gate trace buffer entries. A falling
edge at the external event signal constitutes an event. Rising edges have no effect. The maximum
frequency of events is half the internal core bus frequency.
1.7.2.24 FAULT5 — External Fault Input
This is the PMF fault input signal, with configurable polarity, that can be used to disable PMF operation
when asserted. Asynchronous shutdown of the GDU outputs HG[2:0] and LG[2:0] is not supported. Select
QSMPm[1:0] > 0 in PMF.
1.7.2.25 LIN Physical Layer Signals (Not Available On ZVMC256)
1.7.2.25.1 LIN0
On S12ZVML derivatives this pad is connected to the single-wire LIN data bus.
On the S12ZVM32 and S12ZVM16 derivatives this is a single pin bidirectional high voltage physical
interface. It operates in the VSUP voltage range. It can be connected to an external single-wire data bus.
1.7.2.25.2 LP0TXD
This is the LIN physical layer (or HV physical interface) transmitter input signal.
1.7.2.25.3 LP0RXD
This is the LIN physical layer (or HV physical interface) receiver output signal.
1.7.2.25.4 LP0DR1
This is the LIN (or HV physical interface) LP0DR1 register bit, visible at the designated pin for debug
purposes.
1.7.2.25.5 LGND — LINPHY Ground Pin
On S12ZVM(L) parts LGND is the ground pin for the LIN physical layer LINPHY. This signal must be
connected to board ground, even if the LINPHY is not used.
On S12ZVM32 and S12ZVM16 parts this the ground pin for the HV physical interface. It must be
connected to board ground even when the HV physical interface is not used.
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Freescale Semiconductor 43
1.7.2.26 CAN Physical Layer Signals (ZVMC256 Only)
1.7.2.26.1 CANH0 — CAN Bus High Pin0
The CANH0 signal either connects directly to CAN bus high line or through an optional external common
mode choke.
1.7.2.26.2 CANL0 — CAN Bus Low Pin0
The CANL0 signal either connects directly to CAN bus low line or through an optional external common
mode choke.
1.7.2.26.3 SPLIT0 — CAN Bus Termination Pin0
The SPLIT0 pin can drive a 2.5 V bias for bus termination purpose (CAN bus middle point). Usage of this
pin is optional and depends on bus termination strategy for a given bus network.
1.7.2.26.4 CPTXD0
This is the CAN physical layer transmitter input signal.
1.7.2.26.5 CPRXD0
This is the CAN physical layer receiver output signal.
1.7.2.26.6 CPDR0
This is the CAN physical layer direct control output signal.
1.7.2.26.7 BCTLC
BCTLC provides the base current of an external bipolar that supplies an external CAN physical interface.
This signal is only available on S12ZVMC versions. If not used BCTLC should be left unconnected.
1.7.2.26.8 VDDC (Only Available On S12ZVMC Versions)
VDDC is the CANPHY supply. This is the output voltage of the external bipolar, whose base current is
supplied by BCTLC. It is fed back to the MCU for regulation.
1.7.2.26.9 VSSC (Only Available On ZVMC256 )
VSSC is the CANPHY ground.
1.7.2.27 Gate Drive Unit (GDU) Signals
These are associated with driving the external FETs.
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44 Freescale Semiconductor
1.7.2.27.1 HD — FET Predriver High side Drain Input
This is the drain connection of the external high-side FET s. The voltage present at this input is scaled down
by an internal voltage divider, and can be routed to the internal ADC via an analog multiplexer.
1.7.2.27.2 VBS[2:0] - Bootstrap Capacitor Connections
These signals are the bootstrap capacitor connections for phases HS[2:0]. The capacitor connected
between HS[2:0] and these signals provides the gate voltage and current to drive the external FET.
1.7.2.27.3 HG[2:0] - High-Side Gate signals
The pins are the gate drives for the three high-side power FETs. The drivers provide a high current with
low impedance to turn on and off the high-side power FETs.
1.7.2.27.4 HS[2:0] - High-Side Source signals
The pins are the source connection for the high-side power FETs and the drain connection for the low-side
power FETs. The low voltage end of the bootstrap capacitor is also connected to this pin.
1.7.2.27.5 VLS[2:0] - Voltage Supply for Low -Side Drivers
The pins are the voltage supply pins for the three low-side FET pre-drivers. This pins should be connected
to the voltage regulator output pin VLS_OUT.
1.7.2.27.6 LG[2:0] - Low-Side Gate signals
The pins are the gate drives for the low-side power FETs. The drivers provide a high current with low
impedance to turn on and off the low-side power FETs.
1.7.2.27.7 LS[2:0] - Low-Side Source Signals
The pins are the low-side source connections for the low-side power FETs. The pins are the power ground
pins used to return the gate currents from the low-side power FETs.
1.7.2.27.8 LD[2:0] - Low-Side Drain Signals (ZVMC256 Only)
The pins are the low-side drain connections for the low-side power FETs. The pins can be used to monitor
the low-side power FETs for desaturation conditions.
1.7.2.27.9 CP - Charge Pump Output Signal
This pin is the switching node of the charge pump circuit. The supply voltage for charge pump driver is
the output of the voltage regulator VLS_OUT. The output voltage of this pin switches typically between
0V and 11V. Must be left unconnected if not used.
1.7.2.27.10 VCP - Charge Pump Input For High-Side Driver Supply
This is the charge pump input for the FET high-side gate drive supply circuit. The pin must be left
unconnected if not used.
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Freescale Semiconductor 45
1.7.2.27.11 BST - Boost Signal
This pin provides the basic switching elements required to implement a boost converter for low battery
voltage conditions. This requires external diodes, capacitors and a coil. This pin must be left unconnected
if not used.
The boost function must not be used on devices of the maskset 2N95G, because these devices use the
VSUP pin as the LINPHY supply. Thus boosting the VSUP voltage can cause LIN supply voltage offsets
to other devices on the LIN bus.
1.7.2.27.12 VSSB - Boost Ground Signal
This pin is a separate ground pin for the on chip boost converter switching device.
1.7.2.27.13 VLS_OUT - 11V Voltage Regulator Output
This pin is the output of the integrated voltage regulator. The output voltage is typically VVLS=11V. The
input voltage to the voltage regulator is the VSUP pin.
1.7.2.27.14 AMPP[1:0] - Current Sense Amplifier Non-Inverting Input
These are the current sense amplifier non-inverting inputs.
1.7.2.27.15 AMPM[1:0] - Current Sense Amplifier Inverting Input
These are the current sense amplifier inverting inputs.
1.7.2.27.16 AMP[1:0] - Current Sense Amplifier Output
These are the current sense amplifier outputs.
1.7.2.28 High Current Output — EVDD1
This is a high current, low voltage drop output intended for supplying external devices in a range of up to
20mA. Configuring the pin direction as output automatically enables the high current capability.
1.7.3 Power Supply And Voltage Regulator Related Pins
The power and ground pins are described below. Because fast signal transitions place high, short-duration
current demands on the power supply , use bypass capacitors with high-frequency characteristics and place
them as close to the MCU as possible.
NOTE
All ground pins must be connected together in the application.
1.7.3.1 VDDX1, VDDX2, VSSX1 — Digital I/O Power and Ground Pins
VDDX1, VDDX2 are voltage regulator outputs to supply the digital I/O drivers.
The VSSX1 pin is the ground pin for the digital I/O drivers.
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Bypass requirements on VDDX2, VDDX1, VSSX1 depend on how heavily the MCU pins are loaded.
1.7.3.2 BCTL
BCTL is the ballast connection for the on chip voltage regulator . It provides the base current of an external
bipolar for the VDDX and VDDA supplies. If not used BCTL should be left unconnected.
1.7.3.3 VDDA, VSSA — Power Supply Pins For ADC
These are the power supply and ground pins for the analog-to-digital converter and the voltage regulator.
1.7.3.4 VDD, VSS2 — Core Power And Ground Pins
The VDD voltage supply of nominally 1.8V is generated by the internal voltage regulator. The return
current path is through the VSS1 pin on ZVMC256, or VSS2 pin on other devices.
1.7.3.5 VDDF, VSS1— NVM Power And Ground Pins
The VDDF voltage supply of nominally 2.8V is generated by the internal voltage regulator . The return path
is through the VSS1 pin. On ZVMC256, the return current path is through the VSS1 and VSSX pins.
1.7.3.6 VSUP — Voltage Supply Pin for Voltage Regulator
VSUP is the main supply pin typically coming from the car battery/alternator in the 12V supply voltage
range. This is the voltage supply input from which the voltage regulator generates the on chip voltage
supplies. It must be protected externally against a reverse battery connection.
1.7.3.7 VDDS1 — 5V Supply Pin For External Devices (ZVMC256 Only)
This provides a regulated, short circuit protected, 5V supply for external devices. This is the output voltage
of the external bipolar, whose base current is supplied by BCTLS1. It is fed back to the MCU for
regulation.
1.7.3.8 BCTLS1 (ZVMC256 Only)
BCTLS1 provides the base current of an external bipolar that supplies VDDS1. If not used BCTLS1
should be left unconnected.
1.7.3.9 SNPS1 (ZVMC256 Only)
SNPS1 is the sense input associated with the VDDS1 regulator. The voltage regulator uses it to detect a
short circuit or over current condition.
1.7.3.10 VDDS2 — 5V Supply Pin For External Devices (ZVMC256 Only)
This provides a regulated, short circuit protected, 5V supply for external devices. This is the output voltage
of the external bipolar, whose base current is supplied by BCTLS2. It is fed back to the MCU for
regulation.
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Freescale Semiconductor 47
1.7.3.11 BCTLS2 (ZVMC256 Only)
BCTLS2 provides the base current of an external bipolar that supplies VDDS2. If not used BCTLS2
should be left unconnected.
1.7.3.12 SNPS2 (ZVMC256 Only)
SNPS2 is the sense input associated with the VDDS2 regulator. The voltage regulator uses it to detect a
short circuit or over current condition.
1.7.4 Package and Pinouts
The following package options are offered.
80LQFP-EP (exposed pad) with internal CANPHY and CAN VREG.
64LQFP-EP (exposed pad) with internal LINPHY or HV physical interface.
64LQFP-EP (exposed pad) with CAN VREG to support a low cost external CANPHY.
48LQFP-EP (exposed pad)
The exposed pad must be connected to a grounded contact pad on the PCB.
The exposed pad has an electrical connection within the package to VSSFLAG (VSSX die connection).
The pin out details are shown in the following diagrams. Signals in brackets denote routing options.
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48 Freescale Semiconductor
Figure 1-3. S12ZVMC256 80-pin LQFP pin out
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
VSUP
VLS_OUT
CP
VSSB
BST
VCP
HD
PL0
BCTL
SNPS1
BCTLS1
VDDS1
SNPS2
BCTLS2
VDDS2
LD0
LD1
LD2
PAD0
PAD1
HS1
HG1
VBS1
VLS1
LG1
LS1
LS2
LG2
VLS2
VBS2
HG2
HS2
HS0
HG0
VBS0
VLS0
LG0
LS0
SPLIT0
CANL0
PAD2
PAD3
PAD4
PAD5
PAD6
PAD7
PAD8
VDDA
VSSA
PAD9
PAD10
PAD11
PAD12
PAD13
PAD14
PAD15
BCTLC
VDDC
CANH0
VSSC
BKGD
VSSX1
VDDX1
PP0
PP1
VDD
VSS1
VDDF
PS0
PS1
PS2
PS3
TEST
PE0
PE1
RESET
PT3
PT2
PT1
PT0
S12ZVMC256
80-pin LQFP-EP
Top view
The exposed pad on the package bottom must be
connected to a grounded contact pad on the PCB.
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Freescale Semiconductor 49
Figure 1-4. S12ZVM and S12ZVML option 64-pin LQFP pin out
HG1
VBS1
VLS1
LG1
LS1
LS2
LG2
VLS2
VBS2
HG2
HS2
HS0
HG0
VBS0
VLS0
LG0
VDDX2
TEST
VSS2
VDD
AN0_0 / AMP0 / KWAD0 / PAD0
AN0_1 / AMPM0 / KWAD1 / PAD1
AN0_2 / AMPP0 / KWAD2 / PAD2
AN0_3 / KWAD3 / PAD3
AN0_4 / KWAD4 / PAD4
AN1_0 / AMP1 / KWAD5 / PAD5
(SS0) / AN1_1 / AMPM1 / KWAD6 / PAD6
AN1_2 / AMPP1 / KWAD7 / PAD7
VRH / AN1_3 / KWAD8 / PAD8
VDDA
VSSA
LS0
LIN0
MODC / BKGD
PTUT0 / (IOC0_1) / (LP0RXD) / RXCAN0 / RXD1 / KWS0 / PS0
PTUT1 / (IOC0_2) / (LP0TXD) / TXCAN0 / TXD1 / KWS1 / PS1
MISO0 / (RXD1) / KWS2 / PS2
MOSI0 / (TXD1) / DBGEEV / KWS3 / PS3
PDOCLK / SCK0 / KWS4 / PS4
PDO / SS0 / KWS5 / PS5
BCTL
HD
VCP
BST
VSSB
CP
VLS_OUT
VSUP
LGND
VSSX1
VDDX1
PP0 / EVDD1 / KWP0 / (PWM0_0) / ECLK / FAULT5 / XIRQ
PP1 / KWP1 / (PWM0_1) / IRQ
PP2 / KWP2 / (PWM0_2)
VDDF
VSS1
PE0 / EXTAL
PE1 / XTAL
RESET
PT3 / IOC0_3 / (SS0)
PT2 / IOC0_2 / (PWM0_5) / (SCK0)
PT1 / IOC0_1 / (PWM0_4) / (MOSI0) / (TXD0) / LP0DR1 / PTURE
PT0 / IOC0_0 / (PWM0_3) / (MISO0) / (RXD0)
HS1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
48
47
46
45
44
43
42
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40
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38
37
36
35
34
33
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
S12ZVML and S12ZVM
option
64-pin LQFP-EP
The exposed pad on the package bottom must be
connected to a grounded contact pad on the PCB.
On MC9S12ZVM options the LIN0 pin is mapped to
the HV physical interface function
IOC0_1 and IOC0_2 can be routed to Port S on the
ZVMC256, ZVML31, ZVM32 and ZVM16 devices but
not on other devices.
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50 Freescale Semiconductor
Figure 1-5. S12ZVMC Option 64-pin LQFP pin out
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
S12ZVMC Option
64-pin LQFP-EP
HG1
VBS1
VLS1
LG1
LS1
LS2
LG2
VLS2
VBS2
HG2
HS2
HS0
HG0
VBS0
VLS0
LG0
BCTLC
MODC / BKGD
PTUT0 / RXCAN0 / RXD1 / KWS0 / PS0
PTUT1 / TXCAN0 / TXD1 / KWS1 / PS1
MISO0 / (RXD1) / KWS2 / PS2
MOSI0 / (TXD1) / DBGEEV / KWS3 / PS3
PDOCLK / SCK0 / KWS4 / PS4
PDO / SS0 / KWS5 / PS5
BCTL
HD
VCP
BST
VSSB
CP
VLS_OUT
VSUP
VDDC
VSSX1
VDDX1
PP0 / EVDD1 / KWP0 / (PWM0_0) / ECLK / FAULT5 / XIRQ
PP1 / KWP1 / (PWM0_1) / IRQ
PP2 / KWP2 / (PWM0_2)
VDDF
VSS1
PE0 / EXTAL
PE1 / XTAL
RESET
PT3 / IOC0_3 / (SS0)
PT2 / IOC0_2 / (PWM0_5) / (SCK0)
PT1 / IOC0_1 / (PWM0_4) / (MOSI0) / (TXD0) / PTURE
PT0 / IOC0_0 / (PWM0_3) / (MISO0) / (RXD0)
HS1
VDDX2
TEST
VSS2
VDD
AN0_0 / AMP0 / KWAD0 / PAD0
AN0_1 / AMPM0 / KWAD1 / PAD1
AN0_2 / AMPP0 / KWAD2 / PAD2
AN0_3 / KWAD3 / PAD3
AN0_4 / KWAD4 / PAD4
AN1_0 / AMP1 / KWAD5 / PAD5
(SS0) / AN1_1 / AMPM1 / KWAD6 / PAD6
AN1_2 / AMPP1 / KWAD7 / PAD7
VRH / AN1_3 / KWAD8 / PAD8
VDDA
VSSA
LS0
The exposed pad on the package bottom must be
connected to a grounded contact pad on the PCB.
IOC0_1 and IOC0_2 can be routed to Port S on the
ZVMC256, ZVML31, ZVM32 and ZVM16 devices but
not on other devices.
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MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 51
Figure 1-6. S12ZVM, S12ZVML Option 48-pin LQFP
VBS1
LG1
LS1
LS2
LG2
VLS2
VBS2
HG2
HS2
HS0
HG0
VBS0
VDDX2
TEST
VSS2
VDD
AN0_0 / AMP0 / KWAD0 / PAD0
AN0_1 / AMPM0 / KWAD1 / PAD1
AN0_2 / AMPP0 / KWAD2 / PAD2
VRH / AN1_3 / KWAD8 / PAD8
VDDA
VSSA
LS0
LG0
LIN0
MODC / BKGD
PTUT0 / (LP0RXD) / RXD1 / KWS0 / PS0
PTUT1 / (LP0TXD) / TXD1 / KWS1 / PS1
BCTL
HD
VCP
BST
VSSB
CP
VLS_OUT
VSUP
LGND
VSSX1
VDDX1
PP0 / EVDD1 / KWP0 / (PWM0_0) / ECLK / FAULT5 / XIRQ
VDDF
VSS1
PE0 / EXTAL
PE1 / XTAL
RESET
PT0 / IOC0_0 / (PWM0_3) / (RXD0)
HS1
HG1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
36
35
34
33
32
31
30
29
28
27
26
25
48
47
46
45
44
43
42
41
40
39
38
37
S12ZVM Option
48-pin LQFP-EP
The exposed pad on the package bottom must be
connected to a grounded contact pad on the PCB.
The LIN0 pin is mapped to the HV physical interface
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MC9S12ZVM Family Reference Manual Rev. 2.2
52 Freescale Semiconductor
1.7.4.1 Pin Summary And Signal Mapping
Table 1-8. Pin Summary For 64-Pin and 48-Pin Package Options (Sheet 1 of 3)
LQFP Option Function
(Priority and device dependencies specified in PIM chapter) Power
Supply
Internal Pull
Resistor
64M
/ML
64
MC 48 Pin 1st
Func.
2nd
Func.
3rd
Func.
4th
Func.
5th
Func. CTRL Reset
State
11LIN0—————Up
(weak)
1BCTLC—————
222BKGDMODC————V
DDX —Up
3 3 3 PS0 KWS0 RXD1 RXCAN0 LP0RXD PTUT0 /
IOC0_1
VDDX PERS/
PPSS
Up
4 4 4 PS1 KWS1 TXD1 TXCAN0 LP0TXD PTUT1 /
IOC0_2
VDDX PERS/
PPSS
Up
5 5 PS2 KWS2 RXD1 MISO0 VDDX PERS/
PPSS
Up
6 6 PS3 KWS3 DBGEEV TXD1 MOSI0 VDDX PERS/
PPSS
Up
7 7 PS4 KWS4 SCK0 PDOCLK VDDX PERS/
PPSS
Up
8 8 PS5 KWS5 SS0 PDO VDDX PERS/
PPSS
Up
995BCTL—————
10106HD—————
11117VCP—————
12128BST—————
13139VSSB—————
141410CP—————
151511VLS_OUT—————
161612VSUP—————V
SUP ——
171713VDDX2—————V
DDX ——
181814TEST—————RESET Down
19 19 15 VSS2 —————
202016VDD—————V
DD ——
21 21 17 PAD0 KWAD0 AN0_0 AMP0 VDDA PERADL/
PPSADL
Off
22 22 18 PAD1 KWAD1 AN0_1 AMPM0 VDDA PERADL/
PPSADL
Off
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Freescale Semiconductor 53
23 23 19 PAD2 KWAD2 AN0_2 AMPP0 VDDA PERADL/
PPSADL
Off
24 24 PAD3 KWAD3 AN0_3 VDDA PERADL/
PPSADL
Off
25 25 PAD4 KWAD4 AN0_4 VDDA PERADL/
PPSADL
Off
26 26 PAD5 KWAD5 AN1_0 AMP1 VDDA PERADL/
PPSADL
Off
27 27 PAD6 KWAD6 AN1_1 AMPM1 SS0 —V
DDA PERADL/
PPSADL
Off
28 28 PAD7 KWAD7 AN1_2 AMPP1 VDDA PERADL/
PPSADL
Off
29 29 20 PAD8 KWAD8 AN1_3 VRH0_0 VRH1_0 VDDA PERADH/
PPSADH
Off
30 30 21 VDDA VRH0_1 VRH1_1 VDDA ——
31 31 22 VSSA VRL0_
[1:0]
VRL1_
[1:0]
———V
DDA ——
323223LS0—————
333324LG0—————
3434VLS0—————
35 35 25 VBS0 —————
363626HG0—————
373727HS0—————
383828HS2—————
393929HG2—————
40 40 30 VBS2 —————
414131VLS2—————
424232LG2—————
434333LS2—————
444434LS1—————
454535LG1—————
4646VLS1—————
47 47 36 VBS1 —————
484837HG1—————
Table 1-8. Pin Summary For 64-Pin and 48-Pin Package Options (Sheet 2 of 3)
LQFP Option Function
(Priority and device dependencies specified in PIM chapter) Power
Supply
Internal Pull
Resistor
64M
/ML
64
MC 48 Pin 1st
Func.
2nd
Func.
3rd
Func.
4th
Func.
5th
Func. CTRL Reset
State
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54 Freescale Semiconductor
494938HS1—————
50 50 39 PT0 IOC0_0 PWM1_3 MISO0 RXD0 VDDX PERT/
PPST
Off
51 51 PT1 IOC0_1 PWM1_4 MOSI0 TXD0 LP0DR1/
PTURE
VDDX PERT/
PPST
Off
52 52 PT2 IOC0_2 PWM1_5 SCK0 VDDX PERT/
PPST
Off
53 53 PT3 IOC0_3 SS0 ———V
DDX PERT/
PPST
Off
545440RESET—————V
DDX TEST pin Up
555541PE1XTAL————V
DDX PERE/
PPSE
Down
565642PE0EXTAL————V
DDX PERE/
PPSE
Down
57 57 43 VSS1 —————
585844VDDF—————V
DDF ——
59 59 PP2 KWP2 PWM1_2 VDDX PERP/
PPSP
Off
60 60 PP1 KWP1 PWM1_1 IRQ ——V
DDX PERP/
PPSP
Off
61 61 45 PP0 /
EVDD1
KWP0 PWM1_0 ECLK FAULT5 XIRQ VDDX PERP/
PPSP
Off
626246VDDX1—————V
DDX ——
636347VSSX1—————
6448LGND—————
64VDDC—————
Table 1-9. Pin Summary For 80-Pin Package Option (ZVMC256 Only) (Sheet 1 of 4)
Pin
#
Pin
Name
Function
(Priority and routing options defined in PIM chapter)
Supply
Internal Pull
Resistor
1st
Func.
2nd
Func.
3rd
Func.
4th
Func.
5th
Func.
6th
Func.
7th
Func. CTRL Reset
State
1VSUP—————— V
SUP ——
Table 1-8. Pin Summary For 64-Pin and 48-Pin Package Options (Sheet 3 of 3)
LQFP Option Function
(Priority and device dependencies specified in PIM chapter) Power
Supply
Internal Pull
Resistor
64M
/ML
64
MC 48 Pin 1st
Func.
2nd
Func.
3rd
Func.
4th
Func.
5th
Func. CTRL Reset
State
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Freescale Semiconductor 55
2VLS_OUT—————— V
SUP ——
3CP——————
4VSSB——————
5BST——————
6VCP——————
7HD——————
8 PL0 HVI0 KWL0 IOC0_2
9BCTL——————
10SNPS1——————
11BCTLS1——————
12 VDDS1 VRH0_1 VRH1_1
13SNPS2——————
14BCTLS2——————
15 VDDS2 VRH0_2 VRH1_2
16LD0——————
17LD1——————
18LD2——————
19 PAD0 KWAD0 AN0_0 AMP0 VDDA PERADL/
PPSADL
Off
20 PAD1 KWAD1 AN0_1 AMPM0 VDDA PERADL/
PPSADL
Off
21 PAD2 KWAD2 AN0_2 AMPP0 VDDA PERADL/
PPSADL
Off
22 PAD3 KWAD3 AN0_3 VDDA PERADL/
PPSADL
Off
23 PAD4 KWAD4 AN0_4 VDDA PERADL/
PPSADL
Off
24 PAD5 KWAD5 AN1_0 AMP1 VDDA PERADL/
PPSADL
Off
25 PAD6 KWAD6 AN1_1 SS0 AMPM1 VDDA PERADL/
PPSADL
Off
26 PAD7 KWAD7 AN1_2 AMPP1 VDDA PERADL/
PPSADL
Off
27 PAD8 KWAD8 AN1_3 VDDA PERADH/
PPSADH
Off
28 VDDA VRH0_0 VRH1_0 VDDA ——
Table 1-9. Pin Summary For 80-Pin Package Option (ZVMC256 Only) (Sheet 2 of 4)
Pin
#
Pin
Name
Function
(Priority and routing options defined in PIM chapter)
Supply
Internal Pull
Resistor
1st
Func.
2nd
Func.
3rd
Func.
4th
Func.
5th
Func.
6th
Func.
7th
Func. CTRL Reset
State
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56 Freescale Semiconductor
29 VSSA VRL0_
[1:0]
VRL1_
[1:0]
—————V
DDA ——
30 PAD9 KWAD9 AN1_4 VDDA PERADH/
PPSADH
Off
31 PAD10 KWAD10 AN1_5 VDDA PERADH/
PPSADH
Off
32 PAD11 KWAD11 AN1_6 VDDA PERADH/
PPSADH
Off
33 PAD12 KWAD12 AN1_7 VDDA PERADH/
PPSADH
Off
34 PAD13 KWAD13 AN0_5 PTURE VDDA PERADH/
PPSADH
Off
35 PAD14 KWAD14 AN0_6 PDO VDDA PERADH/
PPSADH
Off
36 PAD15 KWAD15 AN0_7 PDOCLK VDDA PERADH/
PPSADH
Off
37BCTLC———————V
DDC ——
38VDDC———————V
DDC ——
39CANH0———————V
DDC ——
40VSSC———————V
DDC ——
41CANL0———————V
DDC ——
42SPLIT0———————V
DDC ——
43LS0———————
44LG0———————
45VLS0———————
46VBS0———————
47HG0———————
48HS0———————
49HS2———————
50HG2———————
51VBS2———————
52VLS2———————
53LG2———————
54LS2———————
55LS1———————
56LG1———————
Table 1-9. Pin Summary For 80-Pin Package Option (ZVMC256 Only) (Sheet 3 of 4)
Pin
#
Pin
Name
Function
(Priority and routing options defined in PIM chapter)
Supply
Internal Pull
Resistor
1st
Func.
2nd
Func.
3rd
Func.
4th
Func.
5th
Func.
6th
Func.
7th
Func. CTRL Reset
State
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Freescale Semiconductor 57
57VLS1———————
58VBS1———————
59HG1———————
60HS1———————
61 PT0 IOC0_0 PWM1_3 MISO0 RXD0 PWM0_5 VDDX PERT/
PPST
Off
62 PT1 IOC0_1 PWM1_4 MOSI0 TXD0 VDDX PERT/
PPST
Off
63 PT2 IOC0_2 PWM1_0 SCK0 PWM0_7 VDDX PERT/
PPST
Off
64 PT3 IOC0_3 PWM1_2 SS0 PWM0_3———V
DDX PERT/
PPST
Off
65 RESET ———————V
DDX TEST pin Up
66 PE1 XTAL VDDX PERE/
PPSE
Down
67 PE0 EXTAL VDDX PERE/
PPSE
Down
68TEST———————RESET
Down
69 PS3 KWS3 TXD1 MOSI0 CPTXD0 DBGEEV IOC1_1 VDDX PERS/
PPSS
Up
70 PS2 KWS2 RXD1 MISO0 CPRXD0 IOC1_0 VDDX PERS/
PPSS
Up
71 PS1 KWS1 TXD1 SCK0 PTUT1 CPDR0 TXCAN0 IOC0_2 VDDX PERS/
PPSS
Up
72 PS0 KWS0 RXD1 SS0 PTUT0 RXCAN0 IOC0_1 VDDX PERS/
PPSS
Up
73VDDF———————V
DDF ——
74VSS1———————V
DD ——
75VDD———————V
DD ——
76 PP1 KWP1 PWM1_1 PWM0_1 IRQ ———V
DDX PPRP/
PPSP
Off
77 PP0/
EVDD1
KWP0 PWM1_5 ECLK FAULT5 XIRQ ——V
DDX PPRP/
PPSP
Off
78VDDX1———————V
DDX ——
79 VSSX1 ———————V
DDX ——
80BKGDMODC——————V
DDX —Up
Table 1-9. Pin Summary For 80-Pin Package Option (ZVMC256 Only) (Sheet 4 of 4)
Pin
#
Pin
Name
Function
(Priority and routing options defined in PIM chapter)
Supply
Internal Pull
Resistor
1st
Func.
2nd
Func.
3rd
Func.
4th
Func.
5th
Func.
6th
Func.
7th
Func. CTRL Reset
State
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58 Freescale Semiconductor
1.8 Internal Signal Mapping
This section specifies the mapping of inter- module signals at device level.
1.8.1 ADC Connectivity
1.8.1.1 ADC Reference Voltages
The ZVMC256 includes ADC12B_LBA V3 which features VRH_2, VRH_1, VRH_0 and VRL_0. On
these devices for each ADC instance VRH_0 is mapped to VDDA, VRH_1 is mapped to VDDS1 and
VRH_2 is mapped to VDDS2. VRL_0 is mapped to VSSA. Both VDDS1 and VDDS2 must be enabled
by bits in the CPMUVREGCTL register before they can be used as references.
All other devices in the family include ADC12B_LBA V1, which features VRH_1, VRH_0, VRL_1 and
VRL_0. On these devices, for both ADC instances, VRL_0 and VRL_1 are mapped to VSSA, whereby
VRL_0 is the preferred reference for low noise. For both ADC instances VRH_1 is mapped to VDDA and
VRH_0 is mapped to PAD8.
1.8.1.2 ADC Internal Channels
The ADC0 and ADC1 internal channel mapping is shown in Table 1-10 and Table 1-11 respectively.
The GDU current sense amplifier outputs are mapped to pins with ADC input functionality. Thus
configuring the ADC to convert these pin channels automatically converts the current sense outputs.
The ADC internal temperature sensors must be calibrated by the user. No electrical parameters are
specified for these sensors. The VREG temperature sensor electrical parameters are given in the
appendices.
Table 1-10. Usage of ADC0 Internal Channels
ADCCMD_1 CH_SEL[5:0] ADC Channel Usage
0 0 1 0 0 0 Internal_0 ADC0 temperature sensor
0 0 1 0 0 1 Internal_1 VREG temperature sensor or bandgap (VBG)(1)
1. Selectable in CPMU
0 0 1 0 1 0 Internal_2 GDU phase multiplexer voltage
0 0 1 0 1 1 Internal_3 GDU DC link voltage monitor
0 0 1 1 0 0 Internal_4 BATS VSUP sense voltage
0 0 1 1 0 1 Internal_5 HVI[0](2)
2. ZVMC256 only. On other devices this channel is reserved.
0 0 1 1 1 0 Internal_6 Reserved
0 0 1 1 1 1 Internal_7 Reserved
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Freescale Semiconductor 59
1.8.2 Motor Control Loop Signals
The motor control loop signals are described in 1.13.3.1 Motor Control Loop Overview
1.8.3 Device Level PMF Connectivity
1.8.4 BDC Clock Source Connectivity
The BDC clock, BDCCLK, is mapped to the IRCCLK generated in the CPMU module.
The BDC clock, BDCFCLK is mapped to the device bus clock, generated in the CPMU module.
Table 1-11. Usage of ADC1 Internal Channels
ADCCMD_1 CH_SEL[5:0] ADC Channel Usage
0 0 1 0 0 0 Internal_0 ADC1 temperature sensor
0 0 1 0 0 1 Internal_1 VREG temperature sensor or bandgap (VBG)(1)
1. Selectable in CPMU
0 0 1 0 1 0 Internal_2 GDU phase multiplexer voltage
0 0 1 0 1 1 Internal_3 GDU DC link voltage monitor
0 0 1 1 0 0 Internal_4 Reserved
0 0 1 1 0 1 Internal_5 Reserved
0 0 1 1 1 0 Internal_6 Reserved
0 0 1 1 1 1 Internal_7 Reserved
Table 1-12. Mapping of PMF signals
PMF Connection Usage
Channel0 High-Side Gate and Source Pins HG[0], HS[0]
Channel1 Low-Side Gate and Source Pins LG[0], LS[0]
Channel2 High-Side Gate and Source Pins HG[1], HS[1]
Channel3 Low-Side Gate and Source Pins LG[1], LS[1]
Channel4 High-Side Gate and Source Pins HG[2], HS[2]
Channel5 Low-Side Gate and Source Pins LG[2], LS[2]
FAULT5 External FA ULT5 p in
FAULT4 HD Over voltage or GDU over current
FAULT3 VLS under voltage
FAULT2 GDU Desaturation[2] or GDU over current
FAULT1 GDU Desaturation[1] or GDU over current
FAULT0 GDU Desaturation[0] or GDU over current
IS2 GDU Phase Status[2]
IS1 GDU Phase Status[1]
IS0 GDU Phase Status[0]
async_event_edge_sel[1:0] Tied to b11 (both edges active)
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60 Freescale Semiconductor
1.8.5 LINPHY Connectivity
The VLINSUP supply is device dependent.
On ZVML128, ZVMC128, ZVML64, ZVMC64 and ZVML32 devices with the maskset number 2N95G
it is connected to VSUP
On all other devices it is connected to the device HD pin.
The LINPHY0 signals are mapped internally to SCI0. The receiver can be routed to TIM0 input capture
channel3. These routing options are described in detail in the PIM section.
1.8.6 HVPHY Connectivity
The HVPHY signals (S12ZVM32 and S12ZVM16 derivatives only) are mapped internally to SCI0. The
receiver can be routed to TIM0 input capture channel3.
1.8.7 FTMRZ Connectivity
The soc_erase_all_req input to the flash module is driven directly by a BDC erase flash request resulting
from the BDC ERASE_FLASH command.
The FTMRZ FCLKDIV register is forced to 0x05 by the BDC ERASE_FLASH command. This
configures the clock frequency correctly for the initial bus frequency on leaving reset. The bus frequency
must not be changed before launching the ERASE_FLASH command.
The device bus frequency, below which the flash wait states can be disabled, is specified in the device
operating conditions table in Table A-6.
1.8.8 CPMU Connectivity
The API clock generated in the CPMU is not mapped to a device pin in the MC9S12ZVM-Family.
1.9 Modes of Operation
The MCU can operate in different modes. These are described in 1.9.1 Chip Configuration Modes.
The MCU can operate in different power modes to facilitate power saving when full system performance
is not required. These are described in 1.9.3 Low Power Modes.
Some modules feature a software programmable option to freeze the module status whilst the background
debug module is active to facilitate debugging. This is referred to as freeze mode at module level.
1.9.1 Chip Configuration Modes
The different modes and the security state of the MCU affect the debug features (enabled or disabled).
The operating mode out of reset is determined by the state of the MODC signal during reset (Table 1-13).
The MODC bit in the MODE register shows the current operating mode and provides limited mode
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Freescale Semiconductor 61
switching during operation. The state of the MODC signal is latched into this bit on the rising edge of
RESET.
1.9.1.1 Normal Single-Chip Mode
This mode is intended for normal device operation. The opcode from the on-chip memory is being
executed after reset (requires the reset vector to be programmed correctly). The processor program is
executed from internal memory.
1.9.1.2 Special Single-Chip Mode
This mode is used for debugging operation, boot-strapping, or security related operations. The background
debug mode (BDM) is active on leaving reset in this mode
1.9.2 Debugging Modes
The background debug mode (BDM) can be activated by the BDC module or directly when resetting into
Special Single-Chip mode. Detailed information can be found in the BDC module section.
Writing to internal memory locations using the debugger, whilst code is running or at a breakpoint, can
change the flow of application code.
The MC9S12ZVM-Family supports BDC communication throughout the device Stop mode. During S top
mode, writes to control registers can alter the operation and lead to unexpected results. It is thus
recommended not to reconfigure the peripherals during STOP using the debugger.
On the S12ZVML and S12ZVMC versions, the DBG module supports breakpoint, tracing and profiling
features. At board level the profiling pins can use the same 6-pin connector typically used for the BDC
BKGD pin. The connector pin mapping shown in Figure 1-7 is supported by device evaluation boards and
leading development tool vendors.
Figure 1-7. Standard Debug Connector Pin Mapping
1.9.3 Low Power Modes
The device has two dynamic-power modes (run and wait) and two static low-power modes stop and pseudo
stop). For a detailed description refer to the CPMU section.
Table 1-13. Chip Modes
Chip Modes MODC
Normal single chip 1
Special single chip 0
1
3
5
2
4
6
GND B KGD
RST
VDDX
PDO
PDOCLK
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62 Freescale Semiconductor
Dynamic power mode: Run
Run mode is the main full performance operating mode with the entire device clocked. The user
can configure the device operating speed through selection of the clock source and the phase
locked loop (PLL) frequency. To save power, unused peripherals must not be enabled.
Dynamic power mode: Wait
This mode is entered when the CPU executes the WAI instruction. In this mode the CPU does
not execute instructions. The internal CPU clock is switched of f. All peripherals can be active
in system wait mode. For further power consumption the peripherals can individually turn off
their local clocks. Asserting RESET, XIRQ, IRQ, or any other interrupt that is not masked,
either locally or globally by a CCR bit, ends system wait mode.
Static power modes:
Static power (Stop) modes are entered following the CPU STOP instruction unless an NVM
command is active. When no NVM commands are active, the Stop request is acknowledged and
the device enters either Stop or Pseudo Stop mode. Further to the general system aspects of Stop
mode discussed here, the motor control loop specific considerations are described in
Section 1.13.3.10.
Pseudo-stop: In this mode the system clocks are stopped but the oscillator is still running and
the real time interrupt (RTI), watchdog (COP) and Autonomous Periodic Interrupt (API) may
be enabled. Other peripherals are turned off. This mode consumes more current than system
STOP mode but, as the oscillator continues to run, the full speed wake up time from this mode
is significantly shorter.
Stop: In this mode the oscillator is stopped and clocks are switched off. The counters and
dividers remain frozen. The autonomous periodic interrupt (API) may remain active but has a
very low power consumption. The key pad, SCI and MSCAN transceiver modules can be
configured to wake the device, whereby current consumption is negligible.
If the BDC is enabled in Stop mode, the VREG remains in full performance mode and the
CPMU continues operation as in run mode. With BDC enabled and BDCCIS bit set, then all
clocks remain active to allow BDC access to internal peripherals. If the BDC is enabled and
BDCCIS is clear, then the BDCSI clock remains active, but bus and core clocks are disabled.
With the BDC enabled during Stop, the VREG fu ll performance mode and clock activity lead
to higher current consumption than with BDC disabled. If the BDC is enabled in Stop mode,
then the BATS voltage monitoring remains enabled.
1.10 Security
The MCU security mechanism prevents unauthorized access to the flash me mory. It must be emphasized
that part of the security must lie with the application code. An extreme example would be application code
that dumps the contents of the internal memory. This would defeat the purpose of security. Also, if an
application has the capability of downloading code through a serial port and then executing that code (e.g.
an application containing bootloader code), then this capability could potentially be used to read the
EEPROM and Flash memory contents even when the microcontroller is in the secure state. In this
example, the security of the application could be enhanced by requiring a response authentication before
any code can be downloaded.
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Device security details are also described in the flash block description.
1.10.1 Features
The security features of the S12Z chip family are:
Prevent external access of the non-volatile memories (Flash, EEPROM) content
Restrict execution of NVM commands
1.10.2 Securing the Microcontroller
The chip can be secured by programming the security bits located in the options/security byte in the Flash
memory array. These non-volatile bits keep the device secured through reset and power-down.
This byte can be erased and programmed like any other Flash location. Two bits of this byte are used for
security (SEC[1:0]). The contents of this byte are copied into the Flash security register (FSEC) during a
reset sequence.
The meaning of the security bits SEC[1:0] is shown in Table 1-14. For security reasons, the state of device
security is controlled by two bits. To put the device in unsecured mode, these bits must be programmed to
SEC[1:0] = ‘10’. All other combinations put the device in a secured mode. The recommended value to put
the device in secured state is the inverse of the unsecured state, i.e. SEC[1:0] = ‘01’.
NOTE
Please refer to the Flash block description for more security byte details.
1.10.3 Operation of the Secured Microcontroller
By securing the device, unauthorized access to the EEPROM and Flash memory contents is prevented.
Secured operation has the following effects on the microcontroller:
1.10.3.1 Normal Single Chip Mode (NS)
Background debug controller (BDC) operation is completely disabled.
Execution of Flash and EEPROM commands is restricted (described in flash block description).
1.10.3.2 Special Single Chip Mode (SS)
Background debug controller (BDC) commands are restricted
Execution of Flash and EEPROM commands is restricted (described in flash block description).
Table 1-14. Security Bits
SEC[1:0] Security State
00 1 (secured)
01 1 (secured)
10 0 (unsec ur e d)
11 1 (secured)
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In special single chip mode the device is in active BDM after reset. In special single chip mode on a secure
device, only the BDC mass erase and BDC control and status register commands are possible. BDC access
to memory mapped resources is disabled. The BDC can only be used to erase the EEPROM and Flash
memory without giving access to their contents.
1.10.4 Unsecuring the Microcontroller
Unsecuring the microcontroller can be done using three different methods:
1. Backdoor key access
2. Reprogramming the security bits
3. Complete memory erase
1.10.4.1 Unsecuring the MCU Using the Backdoor Key Access
In normal single chip mode, security can be temporarily disabled using the backdoor key access method.
This method requires that:
The backdoor key has been programmed to a valid value
The KEYEN[1:0] bits within the Flash options/security byte select ‘enabled’.
The application program programmed into the microcontroller has the capability to write to the
backdoor key locations
The backdoor key values themselves would not normally be stored within the application data, which
means the application program would have to be designed to receive the backdoor key values from an
external source (e.g. through a serial port)
The backdoor key access method allows debugging of a secured microcontroller without having to erase
the Flash. This is particularly useful for failure analysis.
NOTE
No backdoor key word is allowed to have the value 0x0000 or 0xFFFF.
1.10.5 Reprogramming the Security Bits
Security can also be disabled by erasing and reprogramming the security bits within the flash
options/security byte to the unsecured value. Since the erase operation will erase the entire sector
(0xFF_FE00–0xFF_FFFF) the backdoor key and the interrupt vectors will also be erased; this method is
not recommended for normal single chip mode. The application software can only erase and program the
Flash options/security byte if the Flash sector containing the Flash options/security byte is not protected
(see Flash protection). Thus Flash protection is a useful means of preventing this method. The
microcontroller enters the unsecured state after the next reset following the programming of the security
bits to the unsecured value.
This method requires that:
The application software previously programmed into the microcontroller has been designed to
have the capability to erase and program the Flash options/security byte.
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The Flash sector containing the Flash options/security byte is not protected.
1.10.6 Complete Memory Erase
The microcontroller can be unsecured by erasing the entire EEPROM and Flash memory contents. If
ERASE_FLASH is successfully completed, then the Flash unsecures the device and programs the security
byte automatically.
1.11 Resets and Interrupts
1.11.1 Reset
Table 1-15. lists all reset sources and the vector locations. Resets are explained in detail in the Chapter 8,
“S12 Clock, Reset and Power Management Unit (V10 and V6).
Table 1-15. Reset Sources and Vector Locations
1.11.2 Interrupt Vectors
Table 1-16 lists all interrupt sources and vectors in the default order of priority. The interrupt module
description provides an interrupt vector base register (IVBR) to relocate the vectors.
Vector Address Reset Source CCR
Mask Local Enable
0xFFFFFC Power-On Reset (POR) None None
Low Voltage Reset (LVR)
None None
External pin RESET None None
Clock monitor reset
None OSCE Bit in CPMUOSC register
COP watchdog reset None CR[2:0] in CPMUCOP register
Table 1-16. Interrupt Vector Locations (Sheet 1 of 4)
Vector Address(1) Interrupt Source CCR
Mask Local Enable Wake up
from STOP
Wake up
from WAIT
Vector base + 0x1F8 Unimplemented page1 op-code trap
(SPARE)
None None - -
Vector base + 0x1F4 Unimplemented page2 op-code trap
(TRAP)
None None - -
Vector base + 0x1F0 Software interrupt instruction (SWI) None None - -
Vector base + 0x1EC System call interrupt instruction
(SYS)
None None - -
Vector base + 0x1E8 Machine exception None None - -
Vector base + 0x1E4 Reserved
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Vector base + 0x1E0 Reserved
Vector base + 0x1DC Spurious interrupt None - -
Vector base + 0x1D8 XIRQ interrupt request X bit None Yes Yes
Vector base + 0x1D4 IRQ interrupt request I bit IRQCR(IRQEN) Yes Yes
Vector base + 0x1D0 RTI time-out interrupt I bit CPMUINT (RTIE) See CPMU
section
Yes
Vector base + 0x1CC TIM0 timer channel 0 I bit TIM0TIE (C0I) No Yes
Vector base + 0x1C8 TIM0 timer channel 1 I bit TIM0TIE (C1I) No Yes
Vector base + 0x1C4 TIM0 timer channel 2 I bit TIM0TIE (C2I) No Yes
Vector base + 0x1C0 TIM0 timer channel 3 I bit TIM0TIE (C3I) No Yes
Vector base + 0x1BC
to
Vector base + 0x1B0
Reserved
Vector base + 0x1AC TIM0 timer overflow I bit TIM0TSCR2(TOI) No Yes
Vector base + 0x1A8
to
Vector base + 0x1A4
Reserved
Vector base + 0x1A0 SPI0 I bit SPI0CR1 (SPIE, SPTIE) No Yes
Vector base + 0x19C SCI0 I bit SCI0CR2
(TIE, TCIE, RIE, ILIE)
RXEDIF
only
Yes
Vector base + 0x198 SCI1 I bit SCI1CR2
(TIE, TCIE, RIE, ILIE)
RXEDIF
only
Yes
Vector base + 0x194 Reserved
Vector base + 0x190 Reserved
Vector base + 0x18C ADC0 Error I bit ADC0EIE (IA_EIE, CMD_EIE,
EOL_EIE, TRIG_EIE,
RSTAR_EIE, LDOK_EIE)
ADC0IE(CONIF_OIE)
No Yes
Vector base + 0x188 ADC0 conversion sequence abort I bit ADC0IE(SEQAD_IE) No Yes
Vector base + 0x184 ADC0 conversion complete I bit ADC0CONIE[15:0] No Yes
Vector base + 0x180 Oscillator status interrupt I bit CPMUINT (OSCIE) No Yes
Vector base + 0x17C PLL lock interrupt I bit CPMUINT (LOCKIE) No Yes
Vector base + 0x178
to
Vector base + 0x174
Reserved
Vector base + 0x170 RAM error I bit EECIE (SBEEIE) No Yes
Table 1-16. Interrupt Vector Locations (Sheet 1 of 4)
Vector Address(1) Interrupt Source CCR
Mask Local Enable Wake up
from STOP
Wake up
from WAIT
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Vector base + 0x16C
to
Vector base + 0x168
Reserved
Vector base + 0x164 FLASH error I bit FERCNFG (SFDIE) No Yes
Vector base + 0x160 FLASH command I bit FCNFG (CCIE) No Yes
Vector base + 0x15C CAN0 wake-up I bit CAN0RIER (WUPIE) Yes Yes
Vector base + 0x158 CAN0 errors I bit CAN0RIER (CSCIE, OVRIE) No Yes
Vector base + 0x154 CAN0 receive I bit CAN0RIER (RXFIE) No Yes
Vector base + 0x150 CAN0 transmit I bit CAN0TIER (TXEIE[2:0]) No Yes
Vector base + 0x14C
to
Vector base + 0x148
Reserved
Vector base + 0x144 LINPHY over-current interrupt I bit LPIE (LPDTIE,LPOCIE) No Yes
Vector base + 0x140 BATS supply voltage monitor interrupt I bit BATIE (BVHIE,BVLIE) No Yes
Vector base + 0x13C GDU Desaturation Error I bit GDUIE (GDSEIE) No Yes
Vector base + 0x138 GDU Voltage Limit Detected I bit GDUIE (GOCIE, GHHDIE,
GLVLSIE)
No Yes
Vector base + 0x134
to
Vector base + 0x12C
Reserved
Vector base + 0x128 CAN Physical Layer
(ZVMC256 Only)
I bit CPIE(CPVFIE, CPOCIE)] No Yes
Vector base + 0x124 Port S interrupt I bit PIES[5:0] Yes Yes
Vector base + 0x120 Reserved
Vector base + 0x11C ADC1 Error I bit ADC1EIE (IA_EIE, CMD_EIE,
EOL_EIE, TRIG_EIE,
RSTAR_EIE, LDOK_EIE)
ADC1IE(CONIF_OIE)
No Yes
Vector base + 0x118 ADC1 conversion sequence abort I bit ADC1IE(SEQAD_IE) No Yes
Vector base + 0x114 ADC1 conversion complete I bit ADC1CONIE[15:0] No Yes
Vector base + 0x110 Reserved
Vector base + 0x10C Port P interrupt I bit PIEP[2:0] Yes Yes
Vector base + 0x108 EVDD1 over-current interrupt I bit PIEP(OCIE1) No Yes
Vector base + 0x104 Low-voltage interrupt (LVI) I bit CPMULVCTL (LVIE) No Yes
Vector base + 0x100 Autonomous periodical interrupt
(API) I bit CPMUAPICTRL (APIE) Yes Yes
Vector base + 0xFC High temperature interrupt I bit CPMUHTCTL(HTIE) Yes Yes
Vector base + 0xF8 VDDS integrity interrupt I bit CPMULVCTL(VDDSIE) No Yes
Table 1-16. Interrupt Vector Locations (Sheet 1 of 4)
Vector Address(1) Interrupt Source CCR
Mask Local Enable Wake up
from STOP
Wake up
from WAIT
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1.11.3 Effects of Reset
When a reset occurs, MCU registers and control bits are initialized. Refer to the respective block sections
for register reset states.
Vector base + 0xF4 Port AD interrupt I bit PIEADH(PIEADH0)
PIEADL(PIEADL[7:0])
Yes Yes
Vector base + 0xF0 PTU Reload Overrun I bit PTUIEH(PTUROIE) No Yes
Vector base + 0xEC PTU Trigger0 Error I bit PTUIEL(TG0AEIE,
TG0REIE,TG0TEIE)
No Yes
Vector base + 0xE8 PTU Trigger1 Error I bit PTUIEL(TG1AEIE, TG1REIE,
TG1TEIE)
No Yes
Vector base + 0xE4 PTU Trigger0 Done I bit PTUIEL(TG0DIE) No Yes
Vector base + 0xE0 PTU Trigger1 Done I bit PTUIEL(TG1DIE) No Yes
Vector base + 0xDC
to
Vector base + 0xD4
Reserved
Vector base + 0xD0 PMF Reload A I bit PMFENCA(PWMRIEA) No Yes
Vector base + 0xCC PMF Reload B I bit PMFENCB(PWMRIEB) No Yes
Vector base + 0xC8 PMF Reload C I bit PMFENCC(PWMRIEC) No Yes
Vector base + 0xC4 PMF Fault I bit PMFFIE(FIE[5:0]) No Yes
Vector base + 0xC0 PMF Reload Overrun I bit PMFROIE(PMFROIEA,PMF
ROIEB,PMFROIEC)
No Yes
Vector base + 0xBC Port L interrupt
(ZVMC256 Only)
I bit PIEL(PIEL0) Yes Yes
Vector base + 0xB8
to
Vector base + 0xB0
Reserved
Vector base + 0xAC TIM1 timer channel 0
(ZVMC256 Only)
I bit TIM1TIE (C0I) No Yes
Vector base + 0xA8 TIM1 timer channel 1
(ZVMC256 Only)
I bit TIM1TIE (C1I) No Yes
Vector base + 0xA4
to
Vector base + 0x90
Reserved
Vector base + 0x8C TIM1 timer overflow
(ZVMC256 Only)
I bit TIM1TSCR2(TOI) No Yes
Vector base + 0x88
to
Vector base + 0x10
Reserved
1. 15 bits vector address based
Table 1-16. Interrupt Vector Locations (Sheet 1 of 4)
Vector Address(1) Interrupt Source CCR
Mask Local Enable Wake up
from STOP
Wake up
from WAIT
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On each reset, the Flash module executes a reset sequence to load Flash configuration registers.
1.11.3.1 Flash Configuration Reset Sequence Phase
On each reset, the Flash module will hold CPU activity while loading Flash module registers from the
Flash memory. If double faults are detected in the reset phase, Flash module protection and security may
be active on leaving reset. This is explained in more detail in the Flash module description.
1.11.3.2 Reset While Flash Command Active
If a reset occurs while any Flash command is in progress, that command will be immediately aborted. The
state of the word being programmed or the sector/block being erased is not guaranteed.
1.11.3.3 I/O Pins
Refer to the PIM section for reset configurations of all peripheral module ports.
1.11.3.4 RAM
The system RAM arrays, including their ECC syndromes, are initialized following a power on reset. All
other RAM arrays are not initialized out of any type of reset.
With the exception of a power-on-reset the RAM content is unaltered by a reset occurrence.
1.12 Module device level dependencies
1.12.1 CPMU COP and GDU GSUF Configuration
The COP time-out rate bits CR[2:0] and the WCOP bit in the CPMUCOP register are loaded fro m the
Flash configuration field byte at global address 0xFF_FE0E during the reset sequence. On the device
ZVMC256 the GSUF bit in the GDUF register is also loaded from the Flash configuration field byte at
global address 0xFF_FE0E during the reset sequence. See Table 1-17, Table 1-18 and Table 1-19.
Table 1-17. Initial COP Rate Configuration
NV[2:0] in
FOPT Register
CR[2:0] in
CPMUCOP Register
000 111
001 110
010 101
011 100
100 011
101 010
110 001
111 000
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1.12.2 CPMU High Temperature Trimming
The value loaded from the flash into the CPMUHTTR register is a default value for the device family.
There is no device specific trimming carried out during production. The specified VHT value is a typical
value that is part dependent and should thus be calibrated.
1.12.3 Flash IFR Mapping
1.13 Application Information
1.13.1 ADC Calibration
For applications that do not provide external ADC reference voltages, the VDDA/VSSA supplies can be
used as sources for VRH/VRL respectively. Since the VDDA must be connected to VDDX at board level
in the application, the accuracy of the VDDA reference is limited by the internal voltage regulator
accuracy. In order to compensate for VDDA reference voltage variation in this case, the reference voltage
is measured during production test using the internal reference voltage VBG, which has a narrow variation
over temperature and external voltage supply. VBG is mapped to an internal channel of each ADC module
(Table 1-10,Table 1-11). The resulting 12-bit right justified ADC conversion results of VBG are stored to
the flash IFR for reference, as listed in Table 1-20.
Table 1-18. Initial WCOP Configuration
NV[3] in
FOPT Register
WCOP in
CPMUCOP Register
10
01
Table 1-19. Initial GSUF Configuration
NV[7] in
FOPT Register
GSUF in
GDUF Register
10
01
Table 1-20. Flash IFR Mapping
1514131211109876543210 IFR Byte Address
ADC0 reference conversion using VRH_1/VSSA 0x1F_C040 & 0x1F_C041
ADC0 reference conversion using VRH_0/VSSA 0x1F_C042 & 0x1F_C043
ADC1 reference conversion using VRH_1/VSSA 0x1F_C044 & 0x1F_C045
ADC1 reference conversion using VRH_0/VSSA 0x1F_C046 & 0x1F_C047
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The measurement conditions of the reference conversion are listed in the device electrical parameters
appendix. By measuring the voltage VBG in the application environment and comparing the result to the
reference value in the IFR, it is possible to determine the current ADC reference voltage VRH :
The exact absolute value of an analog conversion can be determined as follows:
With:
ConvertedADInput: Result of the analog to digital conversion of the desired pin
ConvertedReference: Result of internal channel conversion
StoredReference: Value in IFR location
n: ADC resolution (12 bit)
NOTE
The ADC reference voltage VRH must remain at a constant level throughout
the conversion process.
1.13.2 SCI Baud Rate Detection
The baud rate for SCI0 and SCI1 is achieved by using a timer channel to measure the data rate on the RXD
signal.
1. Establish the link:
For SCI0: Set [T0IC3RR1:T0IC3RR0]=0b01 to disconnect IOC0_3 from TIM0 input capture
channel 3 and reroute the timer input to the RXD0 signal of SCI0.
For SCI1: Set [T0IC3RR1:T0IC3RR0]=0b10 to disconnect IOC0_3 from TIM0 input capture
channel 3 and reroute the timer input to the RXD1 signal of SCI1.
2. Determine pulse width of incoming data: Configure TIM0 IC3 to measure time between incoming
signal edges.
1.13.3 Motor Control Application Overview
The following sections provide information for using the device in motor control applications. These
sections provide a description of motor control loop considerations that are not detailed in the individual
module sections, since they concern device level inter module operation specific for motor control. More
detailed information is available in application notes. The applications described are as follows:
1. BDCM - wiper pumps fans
2. BLDCM - pumps, fans and blowers
VRH StoredReference
ConvertedReference
-------------------------------------------------------5V=
Result ConvertedADInput StoredReference 5V
ConvertedReference 2n
------------------------------------------------------------------=
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based on Hall sensors
sensorless based on back-EMF zero crossing comparators
sensorless based on back-EMF ADC measurements
3. PMSM - high-end wiper, pumps, fans and blowers
simple sinewave commutation with position sensor Hall effect, sine-cos
FOC with sine-cos position sensor
sensorless 3-phase sinewave control
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1.13.3.1 Motor Control Loop Overview
The mapping of motor control events at device level as depicted in Figure 1-8 is listed in Table 1-21,
whereby the columns list the names used in the module level descriptions
Figure 1-8. Internal Control Loop Configuration
The control loop consists of the PMF, GDU, ADC and PTU modules. The control loop operates using
either static, dynamic or asynchronous timing. In the following text the event names given in bold type
correspond to those shown in Figure 1-8. The PTU and ADC operate using lists stored in memory. These
lists define trigger points for the PTU, commands for the ADC and results from the ADC. If the PTU is
enabled the reload and async_reload events are immediately passed through to the ADC and GDU
modules.
PMF
PTU ADC0
M
SENSOR
TIM0
ADC1
commutation_event
dc_bus_current
OC0
GDU
zero crossing
back-EMF P1
P2
P3
PHMUX
comparators
GPHS
dc_bus_voltage
reload
async reload
trigger_1
reload
async reload
trigger_0
glb_ldok
reload
async reload
glb_ldok
reload
reloada async_reload
If PTU enabled
If PTU enabled
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.
Each control loop cycle is started by a PMF reload event. The PMF reload event restarts the PTU time
base. If the PTU is enabled, the reload is immediately passed through to the ADC and GDU modules.
The PMF generates the reload event at the required PWM reload frequency. The PMF reload event causes
the PTU time base to restart, to acquire the first trigger times from the list and the ADCs to start loading
the ADC conversion command from the Command Sequence List (CSL).
NOTE
In the PTU there is time window after the reload event assertion before the
first trigger is permitted. This time can be up to 10 bus cycles.
Subsequent triggers also require a load time of 6 bus clock cycles (one
trigger generator enabled) or 10 bus clock cycles (both trigger generators
enabled). This defines the minimal spacing between triggers without
causing a PTU trigger generator timing error.
In the ADC there is 10 bus cycle maximum time window after the reload
event assertion to access the first ADC command from the list. In this
window the ADC conversion can not be started. If the measurement is
control loop related these delays are negligible due to much larger delays in
the PWM-GDU-feedback loop.
When the trigger time is encountered the corresponding PTU trigger generates the trigger_x event for the
associated ADC. For simultaneous sampling the PTU generates simultaneous trigger_x events for both
ADCs. At the trigger_x event the ADC starts the first conversion of the next conversion sequence in the
CSL (the first ADC command is already downloaded).
A commutation event is used by the PMF to generate an async_reload event. The async_reload is used by
the PTU to update lists and re-initialize the trigger lists. If the PTU is enabled the async_reload is
immediately passed through to the ADC.
Table 1-21. Control Loop Events
Device Level Event TIM0 PMF PTU ADC0 ADC1
commutation_event OC0(1)
1. TIM channel OC0 must be configured to toggle on both edges.
commutation_event ———
reload reloada(2)
2. PMF events reloadb and reloadc are not connected at device level
reload Restart Rest art
async_reload async_reload async_reload Seq_abort Seq_abort
trigger_0 ——
trigger_0 Trigger
trigger_1 ——
trigger_1 Trigger
glb_ldok glb_ldok glb_ldok LoadOK LoadOK
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1.13.3.2 Control Loop Timing Considerations
Delays within the separate control loop elements require consideration to ensure correct synchronization.
Regarding the raw PWM0 signal as the starting point and stepping through the control loop stages, the
factors shown in Figure 1-9 contribute to delays within the control loop, starting with the deadtime
insertion, going through the external FETs and back into the internal ADC measurements of external
voltages and currents.
Figure 1-9. Control Loop Delay Overview
The PWM deadtime (TDEAD_X) is an integral number of bus clock cycles, configured by the PMF
deadtime registers.
The GDU propagation delays (tdelon, tdeloff) are specified in the electrical parameter Table E-1.
The FET turn on times (tHGON) are load dependent but are specified for particular loads in the electrical
parameter Table E-1.
The current sense amplifier delay is highly dependent on external components.
The ADC delay until a result is available is specified as the conversion period NCONV in Table C-1.
1.13.3.3 Static Timing Operation
The timing frame is static if it is the same in every control cycle (defined by reload frequency) and is
relative to start of the control cycle. The only settings modified from one control cycle to the next one are
the PWM duty cycle registers.
The main control cycle synchronization event is the PMF reload event. The PMF reload event can be
generated every n PWM periods.
This mode can optionally be extended by a timer channel trigger to PMF to change the PWM channel
operation (e.g. used for BLDCM commutation). In this case, the PMF configuration can propagate the
PWM with
PWM base
PWM cycle
deadtime
GDU
propagation
FET
turn on
Current sense
settling time
ADC delay
TDEAD_x
tdelon
tHGON
(tcslsst)
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trigger through the control loop or can prevent propagation so the static timing of the control cycle and
inter-block coherency are not affected by the trigger.
At the end of the conversion sequence the first ADC command from the new sequence is loaded and the
ADCx waits for the next trigger_x. The PTU continues to generate the trigger_x events for each trigger
time from the list until a new reload or async_reload occurs.
Before the upcoming reload event the CPU:
reads the ADC results from the buffered Conversion Result List
clears the conversion complete flag
services the reload by setting new duty cycle values
sets the PTULDOK bit (corresponding to glb_ldok) to signal the duty cycle coherence
The CPU actions are typically performed in an ISR triggered by the conversion complete flag.
1.13.3.4 Static Timing Fault Handling
The following Faults and/or errors can occur:
Desaturation error, Overvoltage, Undervoltage, Temperature sensor, External fault
The application run-time error is handled by the GDU without CPU interaction. Firstly the FETs are
disabled and the PMF signals switched to an inactive state. To re-enable the operation first the GDU fault
and then PWM fault must be cleared, to automatically re-enable the FET driving at the next PWM
boundary.
PTU reload overrun error
This is an application run-time error caused by the CPU not setting PTULDOK on time. Servicing this type
of error is application dependent and may range from a further reload attempt to a total shut down.
PTU trigger generator reload error, PTU trigger generator error
Since all timing is static, this error should only occur during application debugging. This type of error
occurring in a static timing configuration indicates possible data corruption. This can be serviced by a
control loop shutdown.
PTU memory access error, Memory access double bit ECC error
This type of error occurring in an application indicates data corruption. This can be serviced by a control
loop shutdown.
ADC sequence overrun, ADC command overrun, ADC command error
Since all timing is static, this error should only occur during application debugging. This type of error
occurring in an application indicates possible data corruption. This can be serviced by a control loop
shutdown.
1.13.3.5 Dynamic Timing Operation
The timing frame is dynamic if the following are modified on a cycle by cycle basis:
PMF - duty cycle value registers (PMF_VALx), modulo registers
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PTU - Trigger Event List (PTU_TELx)
ADC - Command Sequence List (ADCx_CSL)
The main philosophy is that all cycle-by-cycle settings for cycle n need to be done within cycle n-1. The
main control cycle synchronization event is the PMF reload event, which can be generated every n PWM
periods.
This mode can optionally be extended by a timer channel trigger PMF to change PWM channel operation
(e.g. used for BLDCM commutation).
The event flow is the same as for static timing.
Before the upcoming reload event the CPU:
reads the ADC results from the buffered Conversion Result List
clears the conversion complete flag
services the reload by setting new duty cycle values and a new PMF modulo value
updates the non-active PTU_TELx
updates the non-active ADCx_CSL
sets the PTULDOK bit (corresponding to glb_ldok) to signal the duty cycle coherence
The CPU actions are typically performed in an ISR triggered by the conversion complete flag.
1.13.3.6 Dynamic Timing Fault Handling
The following Faults and/or errors can occur:
Desaturation error, Overvoltage, Undervoltage, Temperature sensor, External fault
The application run-time error is handled by the GDU without CPU interaction. Firstly the FETs are
disabled and the PMF signals switched to an inactive state. To re-enable the operation first the GDU fault
and then PWM fault must be cleared, to automatically re-enable the FET driving at the next PWM
boundary.
PTU reload overrun error
This is an application run-time error caused by the CPU not setting PTULDOK on time. Servicing this type
of error is application dependent and may range from a further reload attempt to a total shut down.
PTU trigger generator reload error, PTU trigger generator error
This indicates an application run-time error caused by a settings mismatch. Servicing this type of error is
application dependent. In some cases, the ADC values for the current control cycle can be ignored.
PTU memory access error, Memory access double bit ECC error
This type of error occurring in an application indicates possible data corruption. This can be serviced by a
control loop shutdown.
ADC sequence overrun, ADC command overrun, ADC command error
This indicates an application run-time error caused by a settings mismatch. Servicing this type of error is
application dependent. In some cases, the ADC values for the current control cycle can be ignored.
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78 Freescale Semiconductor
1.13.3.7 Asynchronous Timing
This case is an extension of the dynamic timing case by an asynchronous event generated by the Timer.
Note the asynchronous term is referenced to the control cycle.
The timing frame is the same as in dynamic timing case plus it can be asynchronously restarted at any time
within the control cycle.
At the asynchronous commutation_event
the PMF actions are:
1. counter re-start, re-initialization
2. PWM configuration re-initialization according to the selected PWM settings (c enter/edge-aligned
pattern, normal/inverted type etc.)
3. re-initialization of the dead time generators (in case the commutation takes place at a time when
one of the dead times is being generated)
4. re-initialization of the PWM outputs according to pre-set PWM channel output settings in double
buffered registers (mask, swap, output control)
5. re-initialization of the automatic fault clearing
6. generates async_reload event for the PTU
7. optionally updates the PWM duty cycle values based on LDOK state
the PTU actions are:
1. abortion of the trigger_x event generation
2. re-initialization and re-start the PTU counter
3. update of the current list index TGxList based on the glb_ldok state
4. fetch first trigger time from updated TGxList
5. passes the async_reload event immediately to the ADC (if the PTU is enabled)
6. generates the reload event for the ADC
the ADC actions are:
1. the conversion in progress is completed
2. the ADC conversion sequence is aborted and the SEQA flag is set to indicate that the final
conversion occurred during the abortion process (potentially coinciding with a commutation and
is thus less precise than under normal conditions)
3. update of the current lists index ADxLists
4. re-start of the conversion sequencing upon successful abortion - fetches the first ADC command
from the ADCx_CSL, re-sets the result pointer to the top of the list
Note: in case the lists index ADxLists is not updated at the sequence abortion the new restarted
A/D conversions will overwrite the previously converted results.
the GDU actions are:
1. standard operation
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Freescale Semiconductor 79
1.13.3.8 Control Loop Startup Guidelines
The sequence for control loop start up is to firstly configure the signal measurement (inputs/feedback).
Once the measurement is properly configured (correct value is measured at defined time) the output
actuation (control action) is configured. The following modules are involved in signal measurements.
TIM (to identify asynchronous commutation) [BLDC applications only]
PMF (to generate main synchronous events for PTU and ADC)
PTU (to generate delay relative to synchronous events generated by PMF)
ADC (to acquire analog signals under synchronous control)
GDU (zero crossing comparators, Back-EMF muxing) [application dependent]
The TIM OC0 channel identifies the commutation event and restarts the PMF counter . In order to establish
this link TIM and PMF need to be configured and started. Then to sample accurately within one PMF cycle
the PTU needs to be used, so the next step is to configure the PTU to establish PMF to PTU link. The PTU
sends triggers to the ADC to perform a measurement of control signals. So the next step is to configure the
ADC. In some cases the GDU involvement is required and therefore configured.
The control action involves the PMF (to generate the duty cycle for GDU) and the GDU (to propagate the
signal to the MOSFET s). Since the PMF has already been configured for the measurements, only the GDU
need be configured to complete startup. Sometimes the GDU can be configured earlier but the GDU output
is always enabled last.
The recommended startup sequence is summarized as follows:
Configure TIM and PMF to establish the link between TIM OC0 commutation event and PMF
Configure PTU to establish the PMF to PTU link and ensure correct sampling within PMF cycle
Configure the ADC
Configure the GDU
1.13.3.9 Control Loop Shutdown Guidelines
1. Remove energy stored in the system after the power stage
kinetic energy - stop all rotating/moving mass
magnetic energy - gracefully drive currents to zero
2. Put GDU and PMF outputs to safe state
1.13.3.10 Control Loop Stop Mode Considerations
In Stop mode the PMF, PTU, ADC can not run because the bus clock is not running. Thus the GDU must
transition to a disabled state. Before entering S top mode the application must perform the following steps:
1. Remove energy stored in the system after the power stage
kinetic energy - stop all rotating/moving mass
magnetic energy - gracefully drive currents to zero
2. Put GDU and PMF outputs to safe state
3. Verify GDU and PMF safe states
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80 Freescale Semiconductor
4. Verify fault flags and service if necessary
5. Execute the STOP instruction
The return from stop is expected in reverse order:
1. On returning from Stop mode the clocks are automatically enabled coherently
2. Initialize and check device proper functionality (charge pump etc.)
3. Check functionality of the external system
4. Initializes control loop operation, however with PMF and GDU outputs still in safe state
5. Read the ADC values to check the system
6. Start driving energy into the system
based on the measurements from the previous step, the PWM duty cycle values are calculated
7. PMF and GDU outputs are enabled (actively driven)
The device does not support putting the FETs in an active driving state during STOP as the GDU charge
pump clock is not running. This means the device cannot be put in stop mode if the FETS need to be in an
active driving state to protect the system from external energy supply (e.g. externally driven motor-
generator).
NOTE
It is imperative, that whatever the modules perform on entering/exiting Stop
mode, the pre-set complementary mode of operation and dead time insertion
must be guaranteed all the times.
1.13.3.11 Application Signal Visibility
In typical motor control applications, TIM OC0 is used internally to indicate commutation events. To
switch off OC0 visibility at port pin PT0:
Disable output compare signal on pin PT0 in TIM: OCPD[OCPD0]=0b1.
1.13.3.12 Debug Signal Visibility
Depending on required visibility of internal signals on port pins enable the following registers:
Set [PWMPRR]=0b1 in PIM if monitoring of internal PWM waveforms is needed. PWM0_[5:3]
are driven out on pins PT[2:0] and PWM0_[2:0] on pins PP[2:0].
Enable output compare channel OC0 to output commutation event on pin PT0 in TIM:
OCPD[OCPD0]=0b0.
Set PTUDEBUG[PTUREPE]=0b1 in PTU to output the reload event.
Set PTUDEBUG[PTUTxPE]=0b1 with x=0,1 in PTU to output the trigger events.
1.13.4 BDCM Complementary Mode Operation
This section describes BDCM control using center aligned complementary mode with deadtime insertion.
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Freescale Semiconductor 81
The DC Brushed motor power stage topology is a classical full bridge as shown in Figure 1-10. The DC
Brushed motor is driven by the DC voltage source. A rotational field is created by means of commutator
and brushes on the motor. These drives are still very popular because sophisticated calculations and
algorithms such as commutation, waveform generation, or space vector modulation are not required.
Figure 1-10. DC Brushed Motor External Configuration
Usually the control consists of an outer, speed control loop with inner current (torque) control loop. The
inner loop controls DC voltage applied onto the motor winding. The control loop is calculated regularly
within a given period. In most cases, this period matches the PWM reload period.
Driving the DC motor from a DC voltage source, the motor can work in all four quadrants. The
complementary mode of operation with deadtime insertion is needed for smooth reversal of the motor
PWM
0
PWM
2
PWM
3
PWM
1
+ 1/2 U
- 1/2 U
A B
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82 Freescale Semiconductor
current (motor torque), hence smooth full four quadrant control. Usually the center-aligned PWM is
chosen to lower electromagnetic emissions.
Figure 1-11. BDCM Control Loop Configuration
The PWM frequency selection is always a compromise between audible noise, electromagnetic emissions,
current ripples and power switching losses.
The BDCM control loop goal is to provide a controlled DC voltage to the motor winding, whereby it is
controlled cycle-by-cycle using a speed, current or torque feedback loop.
The center aligned PWM waveforms generated by the PMF module are applied to the bridge as shown in
Figure 1-12 whereby the base waveform for PWM0_0 and PWM0_1 is depicted at the top and the
complementary PWM0_0 and PWM0_1 waveforms are shown with deadtime insertion depicted by the
gray phases before the switching edges.
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Freescale Semiconductor 83
Figure 1-12. BDCM Complementary Mode Waveform
Assuming first quadrant operation, forward accelerating operation, the applied voltage at node A must
exceed the applied voltage at node B (Figure 1-10). Thus the PWM0_0 duty cycle must exceed the
PWM0_2 duty cycle.
The duty cycle of PWM0_0 defines the voltage at the first power stage branch.
The duty cycle of PWM0_2 defines the voltage at the second power stage branch.
Modulating the duty cycle every period using the function FPWM then the duty cycle is expressed as:
PWM0_0 duty-cycle = 0.5 + (0.5 * FPWM); For -1<=FPWM <= 1;
PWM0_2 duty-cycle = 0.5 - (0.5 * FPWM)
PWM0_0
PWM0_1
PWM0_2
PWM0_3
TPWM
PWM0_[1:0] base PWM0_[3:2] base
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84 Freescale Semiconductor
1.13.5 BLDC Six-Step Commutation
1.13.5.1 Hall Sensor Triggered Commutation
Figure 1-13. BLDC Configuration With Hall Sensors
This BLDC application uses Hall sensor signals to create commutation triggers. The integrated sense
amplifier and an ADC module are used to measure DC bus current, for torque calculation. The DC bus
voltage measurement is used in the control algorithm to counter-modulate the PWM such that the variation
of the DC-bus voltage does not affect the motor current closed loop. The configuration is as follows:
1. Connect the three Hall sensor signals from the motor to input pins PT3-1.
2. Set [T0IC1RR=1] in the register MODRR2 to establish the link from Hall sensor input pins to TIM
input capture channel 1.
3. Setup TIM IC1 for speed measurement of XORed Hall sensor signals. Enable interrupt on both
edges.
4. Enable TIM OC0 and select toggle action on output compare event: TCTL2[OM0:OL0]=01.
5. Configure PMF for edge-aligned PWM mode with or without restart at commutation:
PMFENCx[RSTR T]. If using the restart option, then select generator A as reload signal source and
keep the following configurations at their default setting: multi timebase generators
(PMFCFG0[MTG]=b0), reload frequency (PMFFQCx[LDFQx]=b0), prescaler
(PMFFQCx[PRSCx]=b00).
6. Enable PMF commutation event input: PMFCFG1[ENCE]=1.
PMF
PTU
ADC0
GDU M
reload
glb_ldok
dc_bus_voltage
trigger_0 dc_bus_current
TIM0 PIM
Hall
EVDD1
PT1
PT2
PT3
XOR
IC1 Sensor
commutation_event
reload
PTIT
async_reload
async_reload
OC0
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Freescale Semiconductor 85
7. Read port register PTIT[3:1] to determine starting sector.
8. Startup motor by applying PWM to the related motor phase.
9. In IC1 interrupt ISR calculate the delay to next commutation and store value to output compare
register. Update registers with next values of mask and swap.
10. On next output compare event the buffered mask and swap information is transferred to the active
PMF registers to execute the commutation.
1.13.5.2 Sensorless Commutation
Figure 1-14. Sensorless BLDC Configuration
To calculate the commutation time in a sensorless motor system the back-EMF zero crossing event of the
currently non-fed phase within an electrical rotation cycle must be determined. For fast motor rotation, the
ADC is used to measure the back-EMF voltage and the DC bus voltage to determine the zero crossing time.
For slow motor rotation the GPHS register can be polled. In either case the zero crossing event is handled
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86 Freescale Semiconductor
by the CPU monitoring flags or responding to interrupts. The TIM then generates the commutation_event
under CPU control, based on the zero crossing time.
1. Enable TIM OC0 and select toggle action on output compare event: TCTL2[OM0:OL0]=0b01.
2. Enable PMF commutation event input: PMFCFG1[ENCE]=0b1.
3. Enable internal ADC channel for measuring the phase voltages from the muxed GDU outputs.
4. Align rotor to stator field. Initialize phase MUX using register GDUPHMUX.
5. Startup motor by applying PWM to an arbitrary motor phase.
6. Take samples of the phase voltages periodically based on PWM cycle to detect zero crossing.
7. Calculate the delay to next commutation and store value to output compare register. Update
registers with next values of mask and swap.
8. On next output compare event the buffered mask and swap information are transferred to the active
PMF register to execute the commutation.
1.13.6 PMSM Control
PMSM control drives all 3 phases simultaneously with sinusoidal waveforms. Both sensorless and Sine-
Cosine position sensor control loop operation are supported.
1.13.6.1 PMSM Sensorless Operation
In this configuration the PMSM stator winding currents are driven sinusoidally and the back EMF
waveform is also sinusoidal. Thus all 3 phases are active simultaneously. The rotor position and speed are
determined by the current and calculated voltages respectively. The back EMF voltage is calculated based
on the currents.
1. Configure PMF for complementary mode operation.
2. Configure PMF for center aligned or phase shifted operation.
3. Select correct PMF deadtime insertion based on external FET switches.
4. Enable GDU current sense opamps for measuring the phase currents from 2 external shunts.
5. Map the output pin of each current sense opamp to the ADC input.
6. Optionally use GDU phase comparators for zero crossing detection to correct deadtime distortion.
7. Fetch targeted motor speed parameter from external source (e.g. SCI)
8. Configure PMF period and duty cycle.
9. Startup motor by applying FOC startup algorithm.
10. Take samples of the phase currents periodically based on PWM cycle to determine motor speed.
11. Calculate FOC algorithm to determine back EMF and motor position.
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Freescale Semiconductor 87
Figure 1-15. Sensorless PMSM Control Loop Configuration
1.13.6.2 PMSM Operation With Sine-Cosine Position Sensor
In this configuration the PMSM stator winding currents are driven sinusoidally and the back EMF
waveform is also sinusoidal. Thus all 3 phases are active simultaneously. The back EMF voltage is
calculated based on the currents. The rotor position and speed are determined by a sine/cosine sensor,
which generates sinusoidal sine/cosine signals, indicating the angle of the rotor in relation to sensor
windings. The sensor is supplied by the EVDD1 pin.
1. Configure PMF for complementary mode operation.
2. Configure PMF for center aligned or phase shifted operation.
3. Select correct PMF deadtime insertion based on external FET switches.
4. Enable GDU current sense opamps for measuring the phase currents from external shunts.
5. Map the output pin of each current sense opamp to the ADC input.
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6. Map the sine/cosine input signals to ADC input channels.
7. Configure the EVDD1 pin as output.
8. Optionally use GDU phase comparators for zero crossing detection to correct dead time distortion.
9. Fetch targeted motor speed parameter from external source (e.g. SCI)
10. Configure PMF period and duty cycle.
11. Start motor by applying startup algorithm.
12. Sample the sine/cosine voltages periodically based on PWM cycle to determine motor position.
13. Use FOC algorithm to determine back EMF and motor speed.
Figure 1-16. PMSM Sine/Cosine Control Loop Configuration
PMF
PTU
ADC0
GDU
M
ADC1
reload
glb_ldok
reload
dc_bus_current1
dc_bus_voltage
trigger_0
trigger_1
dc_bus_current0
zero crossing
IS0
IS1
IS2
sine/cosine
sensor
phase comparison
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Freescale Semiconductor 89
1.13.6.3 Dead time Distortion Correction
PMSM motor control applications driven by sinusoidal voltages by default require zero crossing
information of phase currents to determine the point in time to change sign of deadtime compensation
value to be added to duty cycles.
The GDU phase comparator signals are connected internally to the PMF ISx inputs. This allows the dead
time distortion correction to be applied directly based on the phase status.
1. Align rotor to stator field.
2. Await phase comparator status change.
3. Switch to alternate duty cycle register to compensate distortion.
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90 Freescale Semiconductor
1.13.7 Power Domain Overview (All devices except ZVMC256)
The power domains are illustrate d in Figure 1-17. More detailed information is included in the individual
module descriptions.
Figure 1-17. Power Domain Overview
The system supply voltage VRBATP is a reverse battery protected input voltage. It must be protected
against reverse battery connections and must not be connected directly to the battery voltage (VBAT).
The device supply voltage VSUP provides the input voltage for the internal regulator, VREG_AUTO,
which generates the voltages VDDX, VDD and VDDF. The VDDX domain supplies the device I/O pins,
VDDA supplies the ADC and internal bias current generators. The VDDA and VDDX pins must be
connected at board level, they are not connected directly internally. ESD protection diodes exist between
VDDX and VDDA, therefore forcing a common operating range. The VDD domain supplies the internal
device logic. The VDDF domain supplies sections of the internal Flash NVM circuitry.
GHHDF
CORE
RAM’s
PLL
IRC
OSC
FLASH
PADS
GDU
LDO
BOOST
LINPHY
VREG_AUTO
(5V)
1.8V 2.8V
5V
VDDA
VDDC
BCTLC
VDD
VDDF
VSSA
VSS
VLS_OUT
VLINSUP
LG
LS
GPIO
VSSX
VSSB BST
L
VSUP (12V/18V)
BCTL
VDDX
LIN
LGND EXTXONEXTCON
GBOE
GFDE
PORF
LVRF
GLVLSF
CPS
INT
INT
RES
RES
BATS
INT
VRBATP
ADC
VRH_SEL
VRL_SEL
PAD8
VRH
VRL
VSSA
VDDA
ADC
GCPE
INTXON
VRBATP
VRBATP
VLS
(11V)
CP
VCP
(OPT L)
(OPT L)
(OPT C)
(OPT C)
OPT L = LINPHY package option
OPT C = CANPHY package option
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Freescale Semiconductor 91
The device supports the use of an external PNP to supplement the VDDX supply, for reducing on chip
power dissipation. In this configuration, most of the current flowing from VRBATP to VDDX, flows
through the external PNP. This configuration, using the BCTL pin, can be enabled by register bits
EXTXON and INTXON.
The maximum current that can be sourced by the voltage regulator without the external PNP is specified
as IDDX, for different VSUP ranges, in the electrical parameter appendices. Depending on activity and
external loading, an application current may exceed this specification limit. In such cases the external PNP
configuration must be used.
A supply for an external CANPHY is offered via external device pins BCTLC and VDDC, whereby
BCTLC provides the base current of an external PNP and VDDC is the CANPHY supply (output voltage
of the external PNP). This is only available in the CANPHY package option. This configuration can be
enabled by the register bit EXTCON.
The LINPHY pull-up resistor is internally connected to the HD voltage. This is chosen as opposed to
VSUP to ensure that the LINPHY is not disturbed by the internal VSUP boost circuit. The external
connections for the HD pin must ensure a reverse battery protection.
The ADC register bit VRH_SEL maps the ADC reference VRH to VDDA or to the device pin PAD8.
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92 Freescale Semiconductor
1.13.8 Power Domain Overview (ZVMC256)
Figure 1-18. Power Domain Overview (ZVMC256)
The system supply voltage VRBATP is a reverse battery protected input voltage. It must be protected
against reverse battery connections and must not be connected directly to the battery voltage (VBAT).
The device supply voltage VSUP provides the input voltage for the internal regulator, VREG_AUTO,
which generates the voltages VDDX, VDD and VDDF. The VDDX domain supplies the device I/O pins,
VDDA supplies the ADC and internal bias current generators. The VDDA and VDDX pins must be
connected at board level, they are not connected directly internally. ESD protection diodes exist between
VDDX and VDDA, therefore forcing a common operating range. The VDD domain supplies the internal
device logic. The VDDF domain supplies sections of the internal Flash NVM circuitry.
CORE
RAM’s
PLL
IRC
OSC
FLASH
PADS
GDU
LDO
BOOST
VREG_AUTO
1.8V 2.8V
5V
VDDA
VDDC
BCTLC
VDD
VDDF
VSSA
VSS
VLS_OUT
LG
LS
GPIO
VSSX
VSSB BST
L
VSUP (12V/18V)
BCTL
VDDX
EXTXONEXTCON
GBOE
GFDE
PORF LVRF
GLVLSF
CPS
INT
RES RES
BATS
INT
VRBATP
ADC
VRH_SEL
VRL_SEL
VRH
VRL
VSSA
VDDA
ADC
GCPE
INTXON
VRBATP
VRBATP
VLS
(11V)
CP
VCP
CANPHY
VSSC
VDDS1
BCTLS1
SNPS1
VRBATP
5V
VDDS2
BCTLS2
SNPS2
VRBATP
5V
5V
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Freescale Semiconductor 93
The device supports the use of an external PNP to supplement the VDDX supply, for reducing on chip
power dissipation. In this configuration, most of the current flowing from VRBATP to VDDX, flows
through the external PNP, using the BCTL pin for PNP base current control. The configuration can be
selected by register bits EXTXON and INTXON.
The maximum current that can be sourced by the voltage regulator without the external PNP is specified
as IDDX, for different VSUP ranges, in the electrical parameter appendices. Depending on activity and
external loading, an application current may exceed this specification limit. In such cases the external PNP
configuration must be used.
A supply for the internal CANPHY is offered via device pins BCTLC and VDDC, whereby BCTLC
provides the base current of an external PNP and VDDC is the CANPHY supply (output voltage of the
external PNP). This configuration can be enabled by the register bit EXTCON.
Two separate 5V range supplies (VDDS1 and VDDS2) are provided for external (sensor) components.
These supplies also use external PNP configurations, whereby the PNP base current is controlled by
BCTLS1 and BCTLS2 for VDDS1 and VDDS2 respectively.
The VDDS1 and VDDS2 supplies feature sense inputs SNPS1 and SNPS2, to detect a short circuit or over
current condition and subsequently limit the current to avoid damage.
For each ADC instantiation, the ADC register bit VRH_SEL maps the ADC reference VRH to VDDA or
to a VDDS of a tracker regulator. The Figure 1-18 example only shows one ADC to VDDS connection.
1.13.8.1 Voltage Domain Monitoring
The BATS module monitors the voltage on the VSUP pin, providing status and flag bits, an interrupt and
a connection to the ADC, for accurate measurement of the scaled VSUP level.
The POR circuit monitors the VDD and VDDA domains, ensuring a reset assertion until an adequate
voltage level is attained. The LVR circuit monitors the VDD, VDDF and VDDX domains, generating a
reset when the voltage in any of these domains drops below the specified assert level. The VDDX LVR
monitor is disabled when the VREG is in reduced power mode. A low voltage interrupt circuit monitors
the VDDA domain.
The GDU high side drain voltage, pin HD, is monitored within the GDU and mapped to an interrupt. A
connection to the ADC is provided for accurate measurement of a scaled HD level.
1.13.8.2 FET-Predriver (GDU) Supplies
A dedicated low drop regulator is used to generate the VLS_OUT voltage from VSUP. The VLS_OUT
voltage is used to supply the low side drivers and can be directly connected to the VLS inputs of each low
side driver . For FET -predriver operation at lower VSUP levels, a boost circuit can be enabled by the GBOE
register bit. The boost circuit requires Shottky diodes, a coil and capacitors, as shown in Figure 1-17. More
detailed information is included in the GDU module description.
1.13.8.2.1 Bootstrap Precharge
The FET-predriver high side driver must provide a suf ficient gate-source voltage and sufficient char ge for
the gate capacitance of the external FETs. A bootstrap circuit is used to provide suf ficient charge, whereby
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94 Freescale Semiconductor
the capacitor CBS is first charged to VLS_OUT via an external diode (GDUV4) or internal transistor
(GDUV5), when the low side driver is active Figure 1-19. When the high side driver switches on, the
charge on this capacitor, supplies the FET-predriver via the VBSx pin. The CBS capacitor can only be
charged if the low side driver is active, so after a long period of inactivity of the low side driver, the CBS
capacitor becomes discharged. In this case, the low side dr iver must be switched on to charge CBS before
commencing high side driving. The time it takes to discharge the bootstrap capacitor CBS can be calculated
from the size of the bootstrap capacitor CBS and the current on VBSx pin in the high side inactive phase.
The bootstrap capacitors must be precharged before turning on the high-side drivers for the first time. This
can be done by using the PMF software output control mechanism:
PMFOUTC = 0x3F; // SW control on all outputs
PMFOUTB = 0x2A; // All high-sides off, all low-sides on
The PWM0 signals should be configured to start with turning on the low-side before the high-side drivers
in order to assure precharged bootstraps. Therefore invert the PWM0 signals:
PMFCINV = 0x3F; // Invert all channels to precharge bootstraps
1.13.8.2.2 High Side Charge Pump
A char ge pump voltage is used to supply the high side FET-predriver with enough current to maintain the
gate source voltage. To generate this voltage an external charge pump is driven by the pin CP, switching
between 0V and 11V. The pumped voltage is then applied to the pin VCP.
At 100% duty cycle operation the low-side turn on time is zero during a masked commutation cycle before
the attempting to turn on the high side drivers. This can cause bootstrap charge to decay.
In order to speed-up the high-side gate voltage level directly after commutation, the software should drive
the first PWM cycle with a duty cycle meeting an on-time of at least tminpulse for the low-side drivers and
then switch back to 100% again.
The recommended procedure for BLDC applications is to use the manual correction method
(PMFCCTL[ISENS]) as described below:
Set odd PMF values to alternative duty cycle. At commutation event when one of the three high-side
drivers is turned on (every 120°) set the PMFCCTL[IPOLx] bits and clear them at the next PWM reload
event.
Given unipolar switching mode:
// TIM OC0 ISR:
if ((PMFOUTC == 0x1c) || (PMFOUTC == 0x07) || (PMFOUTC == 0x31)) // all high-side turn-on sectors
PMFCCTL = 0x17; // select odd PMF values
// PMF reload ISR:
PMFCCTL = 0x10; // select even PMF values
The GDU high side drain voltage, pin HD, is supplied from VBAT through a reverse battery protection
circuit. In a typical application the char ge pump is used to switch on an external NMOS, N1, with source
connected to VBAT , by generating a voltage of VBAT+VLS-(2xVdiode). In a reverse battery scenario, the
external bipolar turns on, ensuring that the HD pin is isolated from VBAT by the external NMOS, N1.
Chapter 1 Device Overview MC9S12ZVM-Family
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 95
Figure 1-19. High Side Supply and Charge Pump Concept
GCPE
VLS_OUT (11V)
CP
VCP
VBSx
HGx
0V
11V
1000F
(Motor Dependent)
S
D
1nF
N1
HSx
HD
HIGH SIDE
LOW SIDE
VBAT
CBS
10nF
Diode voltage drop = Vdiode
GCPCD
DIODE NOT REQUIRED WHEN USING GDUV5
Chapter 1 Device Overview MC9S12ZVM-Family
MC9S12ZVM Family Reference Manual Rev. 2.2
96 Freescale Semiconductor
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 97
Chapter 2
Port Integration Module (S12ZVMPIMV3)
Table 2-1. Revision History
Rev. No.
(Item No.) Date Sections
Affected Substantial Change(s)
V03.06 10 Dec 2014 2.3.2.2/119 Extended PWMPRR routing option
V03.07 7 Jan 2015 Table 2-11 Corrected Table 2 -11
V03.08 9 Jan 2015 Table 2-5
Table 2-6
Table 2-7
2.3.1/110
Table 2-9
Table 2-11
Corrections
V03.09 22 Jan 2015 Minor changes in wording
V03.10 23 Jan 2015 Figure 2-5
Tab le 2- 13
Corrected T0IC3RR1-0 description
V03.11 27 Jan 2015 2.3.1/110
2.3.2.3/122
Changed T0C2RR1-0 specification
V03.12 10 Feb 2015 2.1.1/98
Table 2-5
Table 2-6
Added TIM1
Changed PWM0 routing
V03.13 16 Feb 2015 2.1.1/98 Fixed typos and formatting
V03.14 19 Feb 2015 2.1.1/98
2.1.2/101
2.2/102
Tab le 2- 39
Tab le 2- 41
Fixed typos and formatting
V03.15 16 Mar 2015 2.1.1/98
2.2/102
Format updates
V03.16 22 Apr2015 2.1.1/98 Fixed typos and formatting
Chapter 2 Port Integration Module (S12ZVMPIMV3)
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98 Freescale Semiconductor
2.1 Introduction
2.1.1 Overview
The S12ZVM-family port integration module establishes the interface between the peripheral modules and
the I/O pins for all ports. It controls the electrical pin properties as well as the signal prioritization and
multiplexing on shared pins.
This document covers:
Port E
•Port T
GPIO External
Oscillator Pins
PTE1 XTAL PE1
PTE0 EXTAL PE0
GPIO PWM0(1)
1. Only available for ZVMC256
TIM0 PMF SPI0 SCI0
LINPHY0/
HVPHY0 PTU Pins
PTT3 PWM0_31IOC0_3 PWM1_21SS0 PT3
PTT2 PWM0_71IOC0_2 PWM1_5
(2)
2. Not available for ZVMC256
PWM1_01SCK0 PT2
PTT1 IOC0_1 PWM1_4 MOSI0 TXD0 LPDC0(3)
3. Only available for ZVML128, ZVML64, ZVML32, ZVML31, ZVM32, and ZVM16
PTURE2PT1
PTT0 PWM0_51IOC0_0 PWM1_3 MISO0 RXD0 PT0
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Port S
Port P
Port L
GPIO/
KWU DBG SCI1
CAN0
(1)
1. Only available for ZVMC256, ZVMC128, ZVML128, ZVMC64, ZVML64, and ZVML32
CANPHY04LINPHY0/
HVPHY0 TIM1 TIM0 PTU SPI0 DBG Pins
PTS5 SS0 PDO(2)
2. Only favailableor ZVMC128, ZVML128, ZVMC64, ZVML64, and ZVML32
PS5(3)
3. Not available for ZVMC256
PTS4 SCK0 PDOCLK2PS43
PTS3 DBGEEV TXD1 CPTXD0 IOC1_1
(4)
4. Only available for ZVMC256
MOSI0 PS3
PTS2 RXD1 CPRXD0 IOC1_04MISO0 PS2
PTS1 TXD1 TXCAN0 CPDR LPTXD0(5)
5. Only available for ZVML128, ZVML64, ZVML32, ZVML31, ZVM32, and ZVM16
IOC0_2
(6)
6. Only available for ZVMC256, ZVML31, ZVM32, and ZVM16
PTUT1 SCK04PS1
PTS0 RXD1 RXCAN0 LPRXD05IOC0_16PTUT0 SS04PS0
GPIO/KWU PWM0(1)
1. Only available for ZVMC256
PMF ECLK PMF fault IRQ/XIRQ Pins
PTP2 PWM1_2 PP2(2)
2. Not available for ZVMC256
PTP1 PWM0_1 PWM1_1 IRQ PP1
PTP0 PWM1_02PWM1_51ECLK FAULT5 XIRQ PP0
HVI TIM0 Pins
PTIL01IC0_2 PL0(1)
1. Only available for ZVMC256
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100 Freescale Semiconductor
•Port AD
Most I/O pins can be configured by register bits to select data direction and to enable and select pullup or
pulldown devices.
GPIO/KWU ADC1 ADC0 SPI0 GDU PTU DBG Pins
PTADH7 AN0_7 PDOCLK PAD15(1)
1. Only available for ZVMC256
PTADH6 AN0_6 PDO PAD141
PTADH5 AN0_5 PTURE PAD131
PTADH4 AN1_7 PAD121
PTADH3 AN1_6 PAD111
PTADH2 AN1_5 PAD101
PTADH1 AN1_4 PAD91
PTADH0 AN1_3 VRH(2)
2. Not available for ZVMC256
PAD8
PTADL7 AN1_2 AMPP1 PAD7
PTADL6 AN1_1 SS0 AMPM1 PAD6
PTADL5 AN1_0 AMP1 PAD5
PTADL4 AN0_4 PAD4
PTADL3 AN0_3 PAD3
PTADL2 AN0_2 AMPP0 PAD2
PTADL1 AN0_1 AMPM0 PAD1
PTADL0 AN0_0 AMP0 PAD0
Chapter 2 Port Integration Module (S12ZVMPIMV3)
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Freescale Semiconductor 101
NOTE
This document shows the superset of all available features offered by the
S12ZVM device family. Refer to the package and pinout section in the
device overview for functions not available for a particular device or
package option.
2.1.2 Features
The PIM includes these distinctive registers:
Data registers and data direction registers for ports E, T , S, P and AD when used as general-purpose
I/O
Control registers to enable pull devices and select pullups/pulldowns on ports E, T, S, P and AD
Control register to enable open-drain (wired-or) mode on port S
Control register to enable digital input buffers on port AD and L1
Interrupt enable register for pin interrupts and key-wakeup (KWU) on port S, P, AD, and L1
Interrupt flag register for pin interrupts andkey-wakeup (KWU) on port S, P, AD, and L1
Control register to configure IRQ pin operation
Control register to enable ECLK output
Routing registers to support signal relocation on external pins and control internal routings:
SPI0 to alternative pins
Various SCI0-LINPHY0 routing options supporting standalone use and conformance testing2
Various MSCAN0-CANPHY0 routing options for standalone use and conformance testing1
Internal RXD0 and RXD1 link to TIM0 input capture channel (IC0_3) for baud rate detection
Internal ACLK link to TIM0 input capture channel
3 pin input mux to one TIM0 IC channel
2 TIM0 channels to alternative pins3
PMF channels to GDU and/or pins
A standard port pin has the following minimum features:
Input/output selection
5V output drive
5V digital and analog input
Input with selectable pullup or pulldown device
Optional features supported on dedicated pins:
Open drain for wired-or connections
Interrupt input with glitch filtering
High current drive strength from VDDX with over-current protection
1. Only available for ZVMC256
2. Only available for ZVML128, ZVML64, ZVML32, and ZVML31
3. Only available for S12ZVMC256, S12ZVML31, S12ZVM32, and S12ZVM16
Chapter 2 Port Integration Module (S12ZVMPIMV3)
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102 Freescale Semiconductor
Selectable drive strength for high current capable outputs
2.2 External Signal Description
This section lists and describes the signals that do connect off-chip.
Table 2-2 to Table 2-8 show all pins with the pins and functions that are controlled by the PIM. Routing
options are denoted in parenthesis.
NOTE
If there is more than one function associated with a pin, the output priority
is indicated by the position in the table from top (highest priority) to bottom
(lowest priority).Inputs do not arbitrate priority unless noted differently in
Table 2-40.
Table 2-2. BKGD Pin Functions and Priorities
Table 2-3. Port E Pin Functions and Priorities
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority I/O Description Routing
Register Bit
Pin Function
after Reset
- BKGD  MODC(1)
1. Function active when RESET asserted.
I MODC input during RESET —BKGD
 BKGD I/O S12ZBDC communication
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority I/O Description Routing
Register Bit
Pin Function
after Reset
E PE1  XTAL - CPMU OSC signal GPIO
 PTE[1] I/O General-purpose
PE0  EXTAL - CPMU OSC signal
 PTE[0] I/O General-purpose
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Freescale Semiconductor 103
Table 2-4. Port AD Pin Functions and Priorities
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority(1) I/O Description Routing
Register Bit
Pin Function
after Reset
AD PAD15 PDOCLK O DBG profiling clock GPIO
AN0_7 I ADC0 analog input
PTADH[7]/
KWADH[7]
I/O General-purpose; with interrupt and wakeup
PAD14 PDO O DBG profiling data output
AN0_6 I ADC0 analog input
PTADH[6]/
KWADH[6]
I/O General-purpose; with interrupt and wakeup
PAD13 PTURE O PTU reload event
AN0_5 I ADC0 analog input
PTADH[5]/
KWADH[5]
I/O General-purpose; with interrupt and wakeup
PAD12 AN1_7 I ADC1 analog input
PTADH[4]/
KWADH[4]
I/O General-purpose; with interrupt and wakeup
PAD11 AN1_6 I ADC1 analog input
PTADH[3]/
KWADH[3]
I/O General-purpose; with interrupt and wakeup
PAD10 AN1_5 I ADC1 analog input
PTADH[2]/
KWADH[2]
I/O General-purpose; with interrupt and wakeup
PAD9 AN1_4 I ADC1 analog input
PTADH[1]/
KWADH[1]
I/O General-purpose; with interrupt and wakeup
PAD8  VRH I ADC0&1 voltage reference high
 AN1_3 I ADC1 analog input
 PTADH[0]/
KWADH[0]
I/O General-purpose; with interrupt and wakeup
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AD PAD7  AMPP1 I GDU AMP1 non-inverting input (+) GPIO
 AN1_2 I ADC1 analog input
 PTADL[7]/
KWADL[7]
I/O General-purpose; with interrupt and wakeup
PAD6  AMPM1 I GDU AMP1 inverting input (-)
 (SS0) I/O SPI0 slave select SPI0SSRR
 AN1_1 I ADC1 analog input
 PTADL[6]/
KWADL[6]
I/O General-purpose; with interrupt and wakeup
PAD5  AMP1 O GDU AMP1 output
 AN1_0 I ADC1 analog input
 PTADL[5]/
KWADL[5]
I/O General-purpose; with interrupt and wakeup
PAD4  AN0_4 I ADC0 analog input
 PTADL[4]/
KWADL[4]
I/O General-purpose; with interrupt and wakeup
PAD3  AN0_3 I ADC0 analog input
 PTADL[3]/
KWADL[3]
I/O General-purpose; with interrupt and wakeup
PAD2  AMPP0 I GDU AMP0 non-inverting input (+)
 AN0_2 I ADC0 analog input
 PTADL[2]/
KWADL[2]/
I/O General-purpose; with interrupt and wakeup
PAD1  AMPM0 I GDU AMP0 inverting input (-)
 AN0_1 I ADC0 analog input
 PTADL[1]/
KWADL[1]
I/O General-purpose; with interrupt and wakeup
PAD0  AMP0 O GDU AMP0 output
 AN0_0 I ADC0 analog input
 PTADL[0]/
KWADL[0]
I/O General-purpose; with interrupt and wakeup
1. Signals in parentheses denote alternative module routing pins.
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority(1) I/O Description Routing
Register Bit
Pin Function
after Reset
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Freescale Semiconductor 105
Table 2-5. Port T Pin Functions and Priorities
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority(1)
1. Signals in parentheses denote alternative module routing pins.
I/O Description Routing
Register Bit
Pin Function
after Reset
TPT3
 (SS0) I/O SPI0 slave select SPI0RR
SPI0SSRR
GPIO
PWM1_2 O PMF channel 2 PWM32RR
PWMPRR1-0
 IOC0_3 I/O TIM0 channel 3 T0IC3RR1-0
PWM0_3 O PWM0 channel 3
 PTT[3] I/O General-purpose
PT2  (SCK0) I/O SPI0 serial clock SPI0RR
 (PWM1_5) O PMF channel 5 PWM54RR
PWMPRR1-0
(PWM1_0) O PMF channel 0 PWM10RR
PWMPRR1-0
 IOC0_2 I/O TIM0 channel 2 T0C2RR
PWM0_7 O PWM0 channel 7
 PTT[2] I/O General-purpose
PT1  PTURE O PTU reload event
 (TXD0)(2)
2. Default routing for ZVMC256
O SCI0 transmit S0L0RR2-0
 (LPDC0) O LPTXD0 direct control by LP0DR[LP0DR1] S0L0RR2-0
 (MOSI0) I/O SPI0 master out/slave in SPI0RR
 (PWM1_4) O PMF channel 4 PWM54RR
PWMPRR1-0

IOC0_1 I/O TIM0 channel 1 T0C1RR
T0IC1RR
T0IC1RR0
 PTT[1] I/O General-purpose
PT0  (RXD0)2I SCI0 receive S0L0RR2-0
 (MISO0) I/O SPI0 master in/slave out SPI0RR
 (PWM1_3) O PMF channel 3 PWM32RR
PWMPRR1-0
 IOC0_0 I/O TIM0 channel 0
PWM0_5 O PWM0 channel 5
 PTT[0] I/O General-purpose
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Table 2-6. Port S Pin Functions and Priorities
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority(1) I/O Description Routing
Register Bit
Pin Function
after Reset
S PS5  PDO O DBG profiling data output GPIO
 SS0 I/O SPI0 slave select SPI0RR
SPI0SSRR
 PTS[5]/
KWS[5]
I/O General-purpose; with interrupt and wakeup
PS4  PDOCLK O DBG profiling clock
 SCK0 I/O SPI0 serial clock SPI0RR
 PTS[4]/
KWS[4]
I/O General-purpose; with interrupt and wakeup
PS3  MOSI0 I/O SPI0 master out/slave in SPI0RR
IOC1_1 I/O TIM1 channel 1
(CPTXD0) I CANPHY0 transmit input M0C0RR2-0
 (TXD1) O SCI1 transmit SCI1RR
 DBGEEV I DBG external event
 PTS[3]/
KWS[3]
I/O General-purpose; with interrupt and wakeup
PS2  MISO0 I/O SPI0 master in/slave out SPI0RR
IOC1_0 I/O TIM1 channel 0
(CPRXD0) O CANPHY0 receive output M0C0RR2-0
 (RXD1) I SCI1 receive SCI1RR
 PTS[2]/
KWS[2]
I/O General-purpose; with interrupt and wakeup
PS1 SCK0 I/O SPI0 serial clock SPI0RR
 PTUT1 O PTU trigger 1
(IOC0_2) I/O TIM0 channel 2 T0C2RR
 (LPTXD0) I LINPHY0/HVPHY0 transmit input S0L0RR2-0
(CPDR1) O CANPHY0 direct control output CP0DR[CPDR1] M0C0RR2-0
 TXCAN0(2) O MSCAN0 transmit M0C0RR2-0
 TXD1 O SCI1 transmit SCI1RR
 PTS[1]/
KWS[1]
I/O General-purpose; with interrupt and wakeup
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PS0 SS0 I/O SPI0 slave select SPI0RR
SPI0SSRR
 PTUT0 O PTU trigger 0

(IOC0_1) I/O TIM0 channel 1 T0C1RR
T0IC1RR
T0IC1RR0
 (LPRXD0) O LINPHY0/HVPHY0 receive output S0L0RR2-0
 RXCAN02I MSCAN0 receive M0C0RR2-0
 RXD1 I SCI1 receive SCI1RR
 PTS[0]/
KWS[0]
I/O General-purpose; with interrupt and wakeup
1. Signals in parentheses denote alternative module routing pins.
2. Routing option for ZVMC256
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority(1) I/O Description Routing
Register Bit
Pin Function
after Reset
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108 Freescale Semiconductor
Table 2-7. Port P Pin Functions and Priorities
Table 2-8. Port L Pin Functions and Priorities
2.3 Memory Map and Register Definition
This section provides a detailed description of all port integration module registers.
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority(1)
1. Signals in parentheses denote alternative module routing pins.
I/O Description Routing
Register Bit
Pin Function
after Reset
P PP2  (PWM1_2) O PMF channel 2 PWM32RR
PWMPRR
GPIO
 PTP[2]/
KWP[2]
I/O General-purpose; with interrupt and wakeup
PP1  IRQ I Maskable level- or falling edge-sensitive
interrupt
 (PWM1_1) O PMF channel 1 PWM10RR
PWMPRR
PWM0_1 O PWM0 channel 1
 PTP[1]/
KWP[1]
I/O General-purpose; with interrupt and wakeup
PP0  XIRQ I Non-maskable level-sensitive interrupt(2)
2. The interrupt is enabled by clearing the X mask bit in the CPU CCR. The pin is forced to input upon first clearing of the X bit
and is held in this state until reset. A stop or wait recovery with the X bit set (refer to S12ZCPU reference manual) is not
available.
 FAULT5 I PMF f ault
 ECLK O Free-running clock

(PWM1_0) O PMF channel 0 with over-current interrupt;
high-current capable (20 mA)
PWM10RR
PWMPRR
(PWM1_5) O PMF channel 5 with over-current interrupt;
high-current capable (20 mA)
PWM54RR
PWMPRR

PTP[0]/
KWP[0]/
EVDD1
I/O General-purpose; with interrupt and wakeup
Switchable external power supply output with
over-current interrupt; high-current capable (20
mA)
Port Pin
Name
ZVMC256
ZVMC128\64
ZVML128/64/32
ZVML31
ZVM32/16
Pin Function
& Priority I/O Description Routing
Register Bit
Pin Function
after Reset
LPL0PTIL[0]/
KWL[0]
I General-purpose high-voltage input (HVI); with
interrupt and wakeup; optional ADC link
GPI (HVI)
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Subsection 2.3.1 shows all registers and bits at their related addresses within the global SoC register map.
A detailed description of every register bit is given in subsection 2.3.2 to 2.3.4.
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2.3.1 Register Map
Global
Address
Register
Name Bit 7654321Bit 0
0x0200 MODRR0
R0 0
SPI0SSRR SPI0RR SCI1RR S0L0RR2-0(1)
W
0x0201 MODRR1
R
M0C0RR2-0(2) PWMPRR1-0(3) PWM54RR PWM32RR PWM10RR
W
0x0202 MODRR2
R
T0C2RR1-0(4) T0C1RR4RESERVED T0IC3RR1-0 T0IC1RR T0IC1RR04
W
0x0203–
0x0207 Reserved
R00000000
W
0x0208 ECLKCTL
R
NECLK
0000000
W
0x0209 IRQCR
R
IRQE IRQEN
000000
W
0x020A PIMMISC
R000000
OCPE1
0
W
0x020B–
0x020C Reserved
R00000000
W
0x020D Reserved
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x020E Reserved
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x020F Reserved
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0210–
0x025F Reserved
R00000000
W
0x0260 PTE
R000000
PTE1 PTE0
W
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 111
0x0261 Reserved
R00000000
W
0x0262 PTIE
R000000PTIE1PTIE0
W
0x0263 Reserved
R00000000
W
0x0264 DDRE
R000000
DDRE1 DDRE0
W
0x0265 Reserved
R00000000
W
0x0266 PERE
R000000
PERE1 PERE0
W
0x0267 Reserved
R00000000
W
0x0268 PPSE
R000000
PPSE1 PPSE0
W
0x0269–
0x027F Reserved
R00000000
W
0x0280 PTADH
R
PTADH72PTADH62PTADH52PTADH42PTADH32PTADH22PTADH12PTADH0
W
0x0281 PTADL
R
PTADL7 PTADL6 PTADL5 PTADL4 PTADL3 PTADL2 PTADL1 PTADL0
W
0x0282 PTIADH
R PTIADH72PTIADH62PTIADH52PTIADH42PTIADH32PTIADH22PTIADH12PTIADH0
W
0x0283 PTIADL
R PTIADL7 PTIADL6 PTIADL5 PTIADL4 PTIADL3 PTIADL2 PTIADL1 PTIADL0
W
Global
Address
Register
Name Bit 7654321Bit 0
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
112 Freescale Semiconductor
0x0284 DDRADH
R
DDRADH72DDRADH62DDRADH52DDRADH42DDRADH32DDRADH22DDRADL12DDRADH0
W
0x0285 DDRADL
R
DDRADL7 DDRADL6 DDRADL5 DDRADL4 DDRADL3 DDRADL2 DDRADL1 DDRADL0
W
0x0286 PERADH
R
PERADH72PERADH62PERADH52PERADH42PERADH32PERADH22PERADH12PERADH0
W
0x0287 PERADL
R
PERADL7 PERADL6 PERADL5 PERADL4 PERADL3 PERADL2 PERADL1 PERADL0
W
0x0288 PPSADH
R
PPSADH72PPSADH62PPSADH52PPSADH42PPSADH32PPSADH22PPSADH12PPSADH0
W
0x0289 PPSADL
R
PPSADL7 PPSADL6 PPSADL5 PPSADL4 PPSADL3 PPSADL2 PPSADL1 PPSADL0
W
0x028A–
0x028B Reserved
R00000000
W
0x028C PIEADH
R
PIEADH72PIEADH62PIEADH52PIEADH42PIEADH32PIEADH22PIEADH12PIEADH0
W
0x028D PIEADL
R
PIEADL7 PIEADL6 PIEADL5 PIEADL4 PIEADL3 PIEADL2 PIEADL1 PIEADL0
W
0x028E PIFADH
R
PIFADH72PIFADH62PIFADH52PIFADH42PIFADH32PIFADH22PIFADH12PIFADH0
W
0x028F PIFADL
R
PIFADL7 PIFADL6 PIFADL5 PIFADL4 PIFADL3 PIFADL2 PIFADL1 PIFADL0
W
0x0290–
0x0297 Reserved
R00000000
W
0x0298 DIENADH
RDIENADH72DIENADH62DIENADH52DIENADH42DIENADH32DIENADH22DIENADH12DIENADH0
W
0x0299 DIENADL
R
DIENADL7 DIENADL6 DIENADL5 DIENADL4 DIENADL3 DIENADL2 DIENADL1 DIENADL0
W
Global
Address
Register
Name Bit 7654321Bit 0
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 113
0x029A–
0x02BF Reserved
R00000000
W
0x02C0 PTT
R0000
PTT3 PTT2 PTT1 PTT0
W
0x02C1 PTIT
R0000PTIT3PTIT2PTIT1PTIT0
W
0x02C2 DDRT
R0000
DDRT3 DDRT2 DDRT1 DDRT0
W
0x02C3 PERT
R0000
PERT3 PERT2 PERT1 PERT0
W
0x02C4 PPST
R0000
PPST3 PPST2 PPST1 PPST0
W
0x02C5–
0x02CF Reserved
R00000000
W
0x02D0 PTS
R0 0
PTS5(5) PTS45PTS3 PTS2 PTS1 PTS0
W
0x02D1 PTIS
R0 0 PTIS5
5PTIS45PTIS3 PTIS2 PTIS1 PTIS0
W
0x02D2 DDRS
R0 0
DDRS55DDRS45DDRS3 DDRS2 DDRS1 DDRS0
W
0x02D3 PERS
R0 0
PERS55PERS45PERS3 PERS2 PERS1 PERS0
W
0x02D4 PPSS
R0 0
PPSS55PPSS45PPSS3 PPSS2 PPSS1 PPSS0
W
0x02D5 Reserved
R00000000
W
Global
Address
Register
Name Bit 7654321Bit 0
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
114 Freescale Semiconductor
0x02D6 PIES
R0 0
PIES55PIES45PIES3 PIES2 PIES1 PIES0
W
0x02D7 PIFS
R0 0
PIFS55PIFS45PIFS3 PIFS2 PIFS1 PIFS0
W
0x02D8–
0x02DE Reserved
R00000000
W
0x02DF WOMS
R0 0
WOMS55WOMS45WOMS3 WOMS2 WOMS1 WOMS0
W
0x02E0–
0x02EF Reserved
R00000000
W
0x02F0 PTP
R00000
PTP25PTP1 PTP0
W
0x02F1 PTIP
R00000PTIP2
5PTIP1 PTIP0
W
0x02F2 DDRP
R00000
DDRP25DDRP1 DDRP0
W
0x02F3 PERP
R00000
PERP25PERP1 PERP0
W
0x02F4 PPSP
R00000
PPSP25PPSP1 PPSP0
W
0x02F5 Reserved
R00000000
W
0x02F6 PIEP
R
OCIE1
0000
PIEP25PIEP1 PIEP0
W
0x02F7 PIFP
R
OCIF1
0000
PIFP25PIFP1 PIFP0
W
Global
Address
Register
Name Bit 7654321Bit 0
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 115
0x02F8–
0x02FC Reserved
R00000000
W
0x02FD RDRP
R0000000
RDRP0
W
0x02FE–
0x0330 Reserved
R00000000
W
0x0331 PTIL2R0000000PTIL0
W
0x0332 Reserved
R00000000
W
0x0333 PTPSL2R0000000
PTPSL0
W
0x0334 PPSL2R0000000
PPSL0
W
0x0335 Reserved
R00000000
W
0x0336 PIEL2R0000000
PIEL0
W
0x0337 PIFL2R0000000
PIFL0
W
Global
Address
Register
Name Bit 7654321Bit 0
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
116 Freescale Semiconductor
2.3.2 PIM Registers 0x0200-0x020F
This section details the specific purposes of register implemented in address range 0x0200-0x020F. These
registers serve for specific PIM related functions not part of the generic port registers.
If not stated differently, writing to reserved bits has no effect and read returns zero.
All register read accesses are synchronous to internal clocks.
Register bits can be written at any time if not stated dif ferently.
0x0338–
0x0339 Reserved
R00000000
W
0x033A PTABYPL2R0000000
PTABYPL0
W
0x033B PTADIRL2R0000000
PTADIRL0
W
0x033C DIENL2R0000000
DIENL0
W
0x033D PTAENL2R0000000
PTAENL0
W
0x033E PIRL2R0000000
PIRL0
W
0x033F PTTEL2R0000000
PTTEL0
W
1. Only available for ZVML128, ZVML64, ZVML32, and ZVML31
2. Only available for ZVMC256
3. PWMPRR[1] only writable for ZVMC256
4. Only available for ZVMC256, ZVML31, ZVM32, ZVM16
5. Not available for ZVMC256
Global
Address
Register
Name Bit 7654321Bit 0
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 117
2.3.2.1 Module Routing Register 0 (MODRR0)
Address 0x0200 Access: User read/write(1)
1. Read: Anytime
Write: Once in normal, anytime in special mode
76543210
R0 0
SPI0SSRR SPI0RR SCI1RR S0L0RR2-0(2)
2. Only available for ZVML128, ZVML64, ZVML32, and ZVML31
W
SPI0 SS0 SPI0 SCI1 SCI0-LINPHY0/HVPHY0 (see Figure 2-2)
Reset00000000
Figure 2-1. Module Routing Register 0 (MODRR0)
Table 2-9. MODRR0 Routing Register Field Descriptions
Field Description
5
SPI0SSRR
Module Routing Register — SPI0 SS0 routing
Note: This bit takes precedence over SPI0RR.
1 SS0 on PAD6
0 SS0 based on SPI0RR
4
SPI0RR
Module Routing Register — SPI0 routing
1 MISO0 on PT0; MOSI0 on PT1; SCK0 on PT2; SS0 on PT3 or on pin selected by SPI0SSRR
0 MISO0 on PS2; MOSI0 on PS3; SCK0 on PS4 (PS1 for S12ZVMC256); SS0 on PS5 (PS0 for S12ZVMC256)
or on pin selected by SPI0SSRR
3
SCI1RR
Module Routing Register — SCI1 routing
1 TXD1 on PS3; RXD1 on PS2
0 TXD1 on PS1; RXD1 on PS0
2-0
S0L0RR2-0
Module Routing Register — SCI0-LINPHY0/HVPHU0 routing
Selection of SCI0-LINPHY0/HVPHY0 interface routing options to support probing and conformance testing.
Refer to Figure 2-2 for an illustration and Tab le 2- 10 for preferred settings. SCI0 must be enabled for TXD0
routing to take effect on pins. LINPHY0/HVPHY0 must be enabled for LPRXD0 and LPDC0 routings to take effect
on pins.
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
118 Freescale Semiconductor
Figure 2-2. SCI0-to-LINPHY0 Routing Options Illustration
Table 2-10. Preferred Interface Configurations
S0L0RR[2:0] Signal Routing Description
000 Default setting:
SCI0 connects to LINPHY0/HVPHY0, interface internal only
001 Direct control setting:
LP0DR[LPDR1] register bit controls LPTXD0, interface internal
only
T0IC3RR1-0
RXD1
PS0 / LPRXD0
PS1 / LPTXD0
PT1 / TXD0 / LPDC0
PT0 / RXD0
0
1
0
1
0
1
10
01 1
0
1
0
TIM0 input
capture
channel 3
S0L0RR2S0L0RR1S0L0RR0
SCI0 LINPHY0/
TXD0
RXD0
LPTXD0
LPRXD0
LPDR1 LIN
ACLK
11
PT3
00
HVPHY0








Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 119
NOTE
For standalone usage of SCI0 on external pins set
[S0L0RR2:S0L0RR0]=0b110 and disable the LINPHY0/HVPHY0
(LPCR[LPE]=0). This releases PS0 and PS1 to other associated functions
and maintains TXD0 and RXD0 signals on PT1 and PT0, respectively , if no
other function with higher priority takes precedence.
2.3.2.2 Module Routing Register 1 (MODRR1)
100 Probe setting:
SCI0 connects to LINPHY0/HVPHY0, interface accessible on 2
external pins
110 Conformance test setting:
Interface opened and all 4 signals routed externally
Address 0x0201 Access: User read/write(1)
1. Read: Anytime
Write: Once in normal, anytime in special mode
76543210
R
M0C0RR2-0(2)
2. Only available for ZVMC256
PWMPRR1-0(3)
3. PWMPRR[1] only writable for ZVMC256
PWM54RR PWM32RR PWM10RR
W
MSCAN0-CANPHY0 interface PWM probe
PWM1_4
PWM1_5
GDU/pins
PWM1_2
PWM1_3
GDU/pins
PWM1_0
PWM1_1
GDU/pins
Reset00000000
Figure 2-3. Module Routing Register 1 (MODRR1)
S0L0RR[2:0] Signal Routing Description














Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
120 Freescale Semiconductor
Table 2-11. MODRR1 Routing Register Field Descriptions
Field Description
7-5
M0C0RR2-0 Module Routing Register — MSCAN0-CANPHY0 routing
Selection of MSCAN0-CANPHY0 interface routing options to support probing and conformance testing. Refer to
Figure 2-4 for an illustration and Tabl e 2- 12 for preferred settings. MSCAN0 must be enabled for TXCAN0 routing
to take effect on pin. CANPHY0 must be enabled for CPRXD0 and CP0DR[CPDR1] routings to take effect on pins.
4-3
PWMPRR1-0 Module Routing Register — PMF probe
Internal PMF outputs can be probed on related external pins. Probing can be enabled independent of the
PWM54RR, PWM32RR, and PWM10RR settings.
11 PMF channels 1, 3, 5 connected to related PWM1_x pins (only available for ZVMC256)
10 PMF channels 0, 2, 4 connected to related PWM1_x pins (only available for ZVMC256)
01 All PMF channels connected to related PWM1_x pins
00 No PMF channels connected to related PWM1_x pins
2
PWM54RR
Module Routing Register — PWM1_4 and PWM1_5 routing
The PWM channel pair can be configured for internal use with the GDU or with its related external pins only. If set
the signal routing to the pins is established and the related GDU inputs are forced low.
1 PWM1_4 to PT1; PWM1_5 to PT2 (PP0 for S12ZVMC256)
0 PWM1_4 to GDU; PWM1_5 to GDU
1
PWM32RR
Module Routing Register — PWM1_2 and PWM1_3 routing
The PWM channel pair can be configured for internal use with the GDU or with its related external pins only. If set
the signal routing to the pins is established and the related GDU inputs are forced low.
1 PWM1_2 to PP2 (PT3 for S12ZVMC256); PWM1_3 to PT0
0 PWM1_2 to GDU; PWM1_3 to GDU
0
PWM10RR
Module Routing Register — PWM1_0 and PWM1_1 routing
The PWM channel pair can be configured for internal use with the GDU or with its related external pins only. If set
the signal routing to the pins is established and the related GDU inputs are forced low.
1 PWM1_0 to PP0 (PT2 for S12ZVMC256); PWM1_1 to PP1
0 PWM1_0 to GDU; PWM1_1 to GDU
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 121
Figure 2-4. CAN Routing Options Illustration
.
Table 2-12. Preferred Interface Configurations
NOTE
For standalone usage of MSCAN0 on external pins set
M0C0RR[2:0]=0b110 and disable CANPHY0 (CPCR[CPE]=0). This
releases the CANPHY0 associated pins to other shared functions.
M0C0RR[2:0] Description
000 Default setting:
MSCAN connects to CANPHY, interface internal only
001 Direct control setting:
CP0DR[CPDR1] connects to CPTXD, interface internal only
100 Probe setting:
MSCAN connects to CANPHY, interface visible on 2 external pins
110 Conformance test setting:
Interface opened and all 4 signals routed externally
MSCAN0 CANPHY0
TXCAN
RXCAN
CPTXD
CPRXD
CPRXD0
CPTXD0
TXCAN0/CPDR1
RXCAN0
0
1
0
1
0
1
1
0
1
0
M0C0RR2
CPDR1
M0C0RR1M0C0RR0
CANH
SPLIT
CANL
Chapter 2 Port Integration Module (S12ZVMPIMV3)
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122 Freescale Semiconductor
2.3.2.3 Module Routing Register 2 (MODRR2)
Address 0x0202 Access: User read/write(1)
1. Read: Anytime
Write: Once in normal, anytime in special mode
76543210
R
T0C2RR1-0(2)
2. Only available for ZVMC256, ZVML31, ZVM32, and ZVM16
T0C1RR2Reserved T0IC3RR1-0 T0IC1RR T0IC1RR02
W
IOC0_2 IOC0_1 TIM0 IC3 TIM0 IC1 TIM0 IC1
Reset00000000
Figure 2-5. Module Routing Register 2 (MODRR2)
Table 2-13. MODRR2 Routing Register Field Descriptions
Field Description
7-6
T0C2RR1-0
Module Routing Register — TIM0 IOC0_2 routing (ZVMC256, ZVML31, ZVM32, and ZVM16 only)
11 reserved
10(1) TIM0 IC0_2 is routed to the HVI, OC0_2 is disconnected from GPIO
01 TIM0 IOC0_2 is routed to PS1
00 TIM0 IOC0_2 is routed to PT2
5
T0C1RR
Module Routing Register — TIM0 IOC0_1 routing (ZVMC256, ZVML31, ZVM32, and ZVM16 only)
1 TIM0 IOC0_1 is routed to PS0
0 TIM0 IOC0_1 is routed to PT1
4
Reserved
Reserved — This bit must always be set to zero.
3-2
T0IC3RR1-0
Module Routing Register — TIM0 IC3 routing
One out of four different sources can be selected as input to timer channel 3.
11 TIM0 input capture channel 3 is connected to ACLK
10 TIM0 input capture channel 3 is connected to RXD1
01 TIM0 input capture channel 3 is connected to RXD0
00 TIM0 input capture channel 3 is connected to PT3
1
T0IC1RR
Module Routing Register — TIM0 IC1 routing
Timer input capture channel 1 can be used to determine the asynchronous commutation event in BLDC motor
applications with Hall sensors. An integrated XOR gate supports direct connection of the three sensor inputs to
the device.
Note: This bit takes precedence over T0C1RR.
1 TIM0 input capture channel 1 is connected to logically XORed input signals of pins PT3-1
0 TIM0 input capture channel 1 is connected to PT1 or to pin selected by T0C1RR0 (if available)
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 123
2.3.2.4 ECLK Control Register (ECLKCTL)
2.3.2.5 IRQ Control Register (IRQCR)
0
T0IC1RR0
Module Routing Register — TIM0 IC1 routing option 0 (ZVMC256, ZVML31, ZVM32, and ZVM16 only)
Timer input capture channel 1 can be used to determine the asynchronous commutation event in BLDC motor
applications with Hall sensors. An integrated XOR gate supports direct connection of the three sensor inputs to
the device.
Note: This bit takes precedence over T0C1RR and T0IC1RR.
1 TIM0 input capture channel 1 is connected to logically XORed input signals of pins PT0, PS0 and PS1
0 TIM0 input capture channel 1 is connected to pin selected by T0IC1RR
1. Only available for ZVMC256, Reserved forZVML31, ZVM32, and ZVM16
Address 0x0208 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
NECLK
0000000
W
Reset:10000000
Figure 2-6. ECLK Control Register (ECLKCTL)
Table 2-14. ECLKCTL Register Field Descriptions
Field Description
7
NECLK
No ECLKDisable ECLK output
This bit controls the availability of a free-running clock on the ECLK pin. This clock has a fixed rate equivalent to the
internal bus clock.
1 ECLK disabled
0 ECLK enabled
Address 0x0209 Access: User read/write(1)
76543210
R
IRQE IRQEN
000000
W
Reset00000000
Figure 2-7. IRQ Control Register (IRQCR)
Table 2-13. MODRR2 Routing Register Field Descriptions
Field Description
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
124 Freescale Semiconductor
2.3.2.6 PIM Miscellaneous Register (PIMMISC)
1. Read: Anytime
Write:
IRQE: Once in normal mode, anytime in special mode
IRQEN: Anytime
Table 2-15. IRQCR Register Field Descriptions
Field Description
7
IRQE
IRQ select edge sensitive only
1 IRQ pin configured to respond only to falling edges. Falling edges on the IRQ pin are detected anytime when
IRQE=1 and will be cleared only upon a reset or the servicing of the IRQ interrupt.
0 IRQ configured for low level recognition
6
IRQEN
IRQ enable
1 IRQ pin is connected to interrupt logic
0 IRQ pin is disconnected from interrupt logic
Address 0x020A Access: User read/write(1)
1. Read: Anytime
Write:Anytime
76543210
R000000
OCPE1
0
W
Reset00000000
Figure 2-8. PIM Miscellaneous Register (PIMMISC)
Table 2-16. PIM Miscellaneous Register Field Descriptions
Field Description
1
OCPE1
Over-Current Protection Enable — Activate over-current detector on PP0
Refer to Section 2.5.3, “Over-Current Protection on EVDD1
1 PP0 over-current detector enabled
0 PP0 over-current detector disabled
Chapter 2 Port Integration Module (S12ZVMPIMV3)
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Freescale Semiconductor 125
2.3.2.7 Reserved Register
2.3.2.8 Reserved Register
Address 0x020D Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode.
This reserved register is designed for factory test purposes only and is not
intended for general user access. Writing to this register when in special
modes can alter the modules functionality.
76543210
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
Figure 2-9. Reserved Register
Address 0x020E Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode
This reserved register is designed for factory test purposes only and is not
intended for general user access. Writing to this register when in special
modes can alter the modules functionality.
: 76543210
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
Figure 2-10. Reserved Register
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
126 Freescale Semiconductor
2.3.2.9 Reserved Register
NOTE
This reserved register is designed for factory test purposes only and is not
intended for general user access. Writing to this register when in special
modes can alter the modules functionality.
2.3.3 PIM Generic Registers
This section describes the details of all configuration registers.
Writing to reserved bits has no effect and read returns zero.
All register read accesses are synchronous to internal clocks.
All registers can be written at any time, however a specific configuration might not become active.
E.g. a pullup device does not become active while the port is used as a push-pull output.
General-purpose data output availability depends on prioritization; input data registers always
reflect the pin status independent of the use.
Pull-device availability, pull-device polarity, wired-or mode, key-wake up functionality are
independent of the prioritization unless noted differently.
For availability of individual bits refer to Section 2.3.1, “Register Map” and Table 2-39.
Address 0x020F Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode
76543210
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
Figure 2-11. Reserved Register
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 127
2.3.3.1 Port Data Register
This is a generic description of the standard port data registers. Refer to Table 2-39 to determine the
implemented bits in the respective register. Unimplemented bits read zero.
2.3.3.2 Port Input Register
This is a generic description of the standard port input registers. Refer to Table 2-39 to determine the
implemented bits in the respective register. Unimplemented bits read zero.
Address 0x0260 PTE
0x0280 PTADH
0x0281 PTADL
0x02C0 PTT
0x02D0 PTS
0x02F0 PTP
Access: User read/write(1)
1. Read: Anytime. The data source is depending on the data direction value.
Write: Anytime
76543210
R
PTx7 PTx6 PTx5 PTx4 PTx3 PTx2 PTx1 PTx0
W
Reset00000000
Figure 2-12. Port Data Register
Table 2-17. Port Data Register Field Descriptions
Field Description
7-0
PTx7-0
PortGeneral purpose input/output data
This register holds the value driven out to the pin if the pin is used as a general purpose output.
When not used with the alternative function (refer to Ta ble 2 -7 ), these pins can be used as general purpose I/O.
If the associated data direction bits of these pins are set to 1, a read returns the value of the port register, otherwise
the buffered pin input state is read.
Address 0x0262 PTIE
0x0282 PTIADH
0x0283 PTIADL
0x02C1 PTIT
0x02D1 PTIS
0x02F1 PTIP
Access: User read only(1)
1. Read: Anytime
Write:Never
76543210
R PTIx7 PTIx6 PTIx5 PTIx4 PTIx3 PTIx2 PTIx1 PTIx0
W
Reset--------
Figure 2-13. Port Input Register
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
128 Freescale Semiconductor
2.3.3.3 Data Direction Register
This is a generic description of the standard data direction registers. Refer to Table 2-39 to determine the
implemented bits in the respective register. Unimplemented bits read zero.
Table 2-18. Port Input Register Field Descriptions
Field Description
7-0
PTIx7-0
Port Input — Data input
A read always returns the buffered input state of the associated pin. It can be used to detect overload or short circuit
conditions on output pins.
Address 0x0264 DDRE
0x0284 DDRADH
0x0285 DDRADL
0x02C2 DDRT
0x02D2 DDRS
0x02F2 DDRP
Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
DDRx7 DDRx6 DDRx5 DDRx4 DDRx3 DDRx2 DDRx1 DDRx0
W
Reset00000000
Figure 2-14. Data Direction Register
Table 2-19. Data Direction Register Field Descriptions
Field Description
7-0
DDRx7-0
Data Direction — Select general-purpose data direction
This bit determines whether the pin is a general-purpose input or output. If a peripheral module controls the pin the
content of the data direction register is ignored. Independent of the pin usage with a peripheral module this register
determines the source of data when reading the associated data register address.
Due to internal synchronization circuits, it can take up to two bus clock cycles until the correct
value is read on port data and port input registers, when changing the data direction
register. Eqn. 0-1
1 Associated pin is configured as output
0 Associated pin is configured as input
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 129
2.3.3.4 Pull Device Enable Register
This is a generic description of the standard pull device enable registers. Refer to Table 2-39 to determine
the implemented bits in the respective register. Unimplemented bits read zero.
Address 0x0266 PERE
0x0286 PERADH
0x0287 PERADL
0x02C3 PERT
0x02D3 PERS
0x02F3 PERP
Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
PERx7 PERx6 PERx5 PERx4 PERx3 PERx2 PERx1 PERx0
W
Reset
Ports E:00000011
Ports S: 0 0 1(2)
2. Unimplemented (reads zero) for S12ZVMC256
121111
Others:00000000
Figure 2-15. Pull Device Enable Register
Table 2-20. Pull Device Enable Register Field Descriptions
Field Description
7-0
PERx7-0
Pull Enable — Activate pull device on input pin
This bit controls whether a pull device on the associated port input or open-drain output pin is active. If a pin is used
as push-pull output this bit has no effect. The polarity is selected by the related polarity select register bit. On open-
drain output pins only a pullup device can be enabled.
1 Pull device enabled
0 Pull device disabled
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
130 Freescale Semiconductor
2.3.3.5 Polarity Select Register
This is a generic description of the standard polarity select registers. Refer to Table 2-39 to determine the
implemented bits in the respective register. Unimplemented bits read zero.
2.3.3.6 Port Interrupt Enable Register
Read: Anytime
Address 0x0268 PPSE
0x0288 PPSADH
0x0289 PPSADL
0x02C4 PPST
0x02D4 PPSS
Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
PPSx7 PPSx6 PPSx5 PPSx4 PPSx3 PPSx2 PPSx1 PPSx0
W
Reset
Ports E:00000011
Others:00000000
Figure 2-16. Polarity Select Register
Table 2-21. Polarity Select Register Field Descriptions
Field Description
7-0
PPSx7-0
Pull Polarity Select — Configure pull device and pin interrupt edge polarity on input pin
This bit selects a pullup or a pulldown device if enabled on the associated port input pin.
If a port has interrupt functionality this bit also selects the polarity of the active edge.
If MSCAN is active a pullup device can be activated on the RXCAN input; attempting to select a pulldown disables
the pull-device.
1 Pulldown device selected; rising edge selected
0 Pullup device selected; falling edge selected
Address 0x028C PIEADH
0x028D PIEADL
0x02D6 PIES
0x0336 PIEL
Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
PIEx7 PIEx6 PIEx5 PIEx4 PIEx3 PIEx2 PIEx1 PIEx0
W
Reset00000000
Figure 2-17. Port Interrupt Enable Register
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 131
This is a generic description of the standard port interrupt enable registers. Refer to Table 2-39 to
determine the implemented bits in the respective register. Unimplemented bits read zero.
2.3.3.7 Port Interrupt Flag Register
This is a generic description of the standard port interrupt flag registers. Refer to Table 2-39 to determine
the implemented bits in the respective register. Unimplemented bits read zero.
Table 2-22. Port Interrupt Enable Register Field Descriptions
Field Description
7-0
PIEx7-0
Port Interrupt Enable — Activate pin interrupt (KWU)
This bit enables or disables the edge sensitive pin interrupt on the associated pin. An interrupt can be generated if
the pin is operating in input or output mode when in use with the general-purpose or related peripheral function.
1 Interrupt is enabled
0 Interrupt is disabled (interrupt flag masked)
Address 0x028E PIFADH
0x028F PIFADL
0x02D7 PIFS
0x0337 PIFL
Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear
76543210
R
PIFx7 PIFx6 PIFx5 PIFx4 PIFx3 PIFx2 PIFx1 PIFx0
W
Reset00000000
Figure 2-18. Port Interrupt Flag Register
Table 2-23. Port Interrupt Flag Register Field Descriptions
Field Description
7-0
PIFx7-0
Port Interrupt Flag — Signal pin event (KWU)
This flag asserts after a valid active edge was detected on the related pin (see Section 2.4.5, “Pin interrupts and Key-
Wakeup (KWU)”). This can be a rising or a falling edge based on the state of the polarity select register. An interrupt
will occur if the associated interrupt enable bit is set.
Writing a logic “1” to the corresponding bit field clears the flag.
1 Active edge on the associated bit has occurred
0 No active edge occurred
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132 Freescale Semiconductor
2.3.3.8 Digital Input Enable Register
This is a generic description of the standard digital input enable registers. Refer to Table 2-39 to determine
the implemented bits in the respective register. Unimplemented bits read zero.
2.3.3.9 Reduced Drive Register
This is a generic description of the standard reduced drive registers. Refer to Table 2-39 to determine the
implemented bits in the respective register. Unimplemented bits read zero.
Address 0x0298 DIENADH
0x0299 DIENADL
Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
DIENx7 DIENx6 DIENx5 DIENx4 DIENx3 DIENx2 DIENx1 DIENx0
W
Reset00000000
Figure 2-19. Digital Input Enable Register
Table 2-24. Digital Input Enable Register Field Descriptions
Field Description
7-0
DIENx7-0
Digital Input Enable — Input buffer control
This bit controls the digital input function. If set to 1 the input buffers are enabled and the pin can be used with the
digital function. If a peripheral module is enabled which uses the pin with a digital function the input buffer is activated
and the register bit is ignored. If the pin is used with an analog function this bit shall be cleared to avoid shoot-through
current.
1 Associated pin is configured as digital input
0 Associated pin digital input is disabled
Address 0x02FD RDRP Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
RDRx7 RDRx6 RDRx5 RDRx4 RDRx3 RDRx2 RDRx1 RDRx0
W
Reset00000000
Figure 2-20. Reduced Drive Register
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 133
2.3.3.10 Wired-Or Mode Register
This is a generic description of the standard wired-or registers. Refer to Table 2-39 to determine the
implemented bits in the respective register. Unimplemented bits read zero.
2.3.3.11 PIM Reserved Register
Table 2-25. Reduced Drive Register Field Descriptions
Field Description
7-0
RDRx7-0
Reduced Drive Register — Select reduced drive for output pin
This bit configures the drive strength of the associated output pin as either full or reduced. If a pin is used as input
this bit has no effect. The reduced drive function is independent of which function is being used on a particular pin.
1 Reduced drive selected (approx. 1/10 of the full drive strength)
0 Full drive strength enabled
Address 0x02DF WOMS Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
WOMx7 WOMx6 WOMx5 WOMx4 WOMx3 WOMx2 WOMx1 WOMx0
W
Reset00000000
Figure 2-21. Wired-Or Mode Register
Table 2-26. Wired-Or Mode Register Field Descriptions
Field Description
7-0
WOMx7-0
Wired-Or Mode — Enable open-drain output
This bit configures the output buffer as wired-or. If enabled the output is driven active low only (open-drain) while the
active high drive is turned off. This allows a multipoint connection of several serial modules. These bits have no
influence on pins used as inputs.
1 Output buffers operate as open-drain outputs
0 Output buffers operate as push-pull outputs
Address (any reserved) Access: User read(1)
1. Read: Always reads 0x00
Write: Unimplemented
76543210
R00000000
W
Reset00000000
Figure 2-22. PIM Reserved Register
Chapter 2 Port Integration Module (S12ZVMPIMV3)
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134 Freescale Semiconductor
2.3.4 PIM Generic Register Exceptions
This section lists registers with deviations from the generic description in one or more register bits.
2.3.4.1 Port P Polarity Select Register (PPSP)
2.3.4.2 Port P Interrupt Enable Register (PIEP)
Read: Anytime
Address 0x02F4 PPSP Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R00000
PPSP2 PPS1P PPSP0
W
Reset00000000
Figure 2-23. Port P Polarity Select Register
Table 2-27. Port P Polarity Select Register Field Descriptions
Field Description
2-1
PPSP
See Section 2.3.3.5, “Polarity Select Register
0
PPSP
Pull Polarity Select — Configure pull device and pin interrupt edge polarity on input pin
This bit selects a pullup or a pulldown device if enabled on the associated port input pin.
This bit also selects the polarity of the active interrupt edge.
This bit selects if a high or a low level on FAULT5 generates a fault event in PMF.
1 Pulldown device selected; rising edge selected; active-high level selected on FAULT5 input
0 Pullup device selected; falling edge selected; active-low level selected on FAULT5 input
Address 0x02F6 PIEP Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
OCIE1
0000
PIEP2 PIEP1 PIEP0
W
Reset00000000
Figure 2-24. Port P Interrupt Enable Register
Chapter 2 Port Integration Module (S12ZVMPIMV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 135
2.3.4.3 Port P Interrupt Flag Register (PIFP)
Table 2-28. Port P Interrupt Enable Register Field Descriptions
Field Description
7
OCIE1
Over-Current Interrupt Enable register
This bit enables or disables the over-current interrupt on PP0.
1 PP0 over-current interrupt enabled
0 PP0 over-current interrupt disabled (interrupt flag masked)
2-0
PIEP2-0
See Section 2.3.3.6, “Port Interrupt Enable Register
Address 0x02F7 PIFP Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear
76543210
R
OCIF1
0000
PIFP2 PIFP1 PIFP0
W
Reset00000000
Figure 2-25. Port P Interrupt Flag Register
Table 2-29. Port P Interrupt Flag Register Field Descriptions
Field Description
7
OCIF1
Over-Current Interrupt Flag register
This flag asserts if an over-current condition is detected on PP0 (Section 2.4.6, “Over-Current Interrupt”).
Writing a logic “1” to the corresponding bit field clears the flag.
1 PP0 Over-current event occurred
0 No PP0 over-current event occurred
2-0
PIFP2-0
See Section 2.3.3.7, “Port Interrupt Flag Register
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136 Freescale Semiconductor
2.3.4.4 Port L Input Register (PTIL)
2.3.4.5 Port L Pull Select Register (PTPSL)
Address 0x0331 Access: User read only(1)
1. Read: Anytime
Write: No Write
76543210
R0000000PTIL0
(2)
2. Only available for S12ZVMC256
W
Reset0000000 -
Figure 2-26. Port L Input Register (PTIL)
Table 2-30. PTIL - Register Field Descriptions
Field Description
0
PTIL
Port Input Data Register Port L
A read returns the synchronized input state if the associated pin is used in digital mode, that is the related
DIENL bit is set to 1 and the pin is not used in analog mode (PTAL[PTAENL]=0). See Section 2.3.4.11, “Port
L Input Divider Ratio Selection Register (PIRL)”. A one is read in any other case(1).
1. Refer to PTTEL bit description in Section 2.3.4.11, “Port L Input Divider Ratio Selection Register (PIRL) for an override
condition.
Address 0x0333 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R 0 0 0 0 0 0 0
PTPSL0(2)
2. Only available for S12ZVMC256
W
Reset00000000
Figure 2-27. Port L Pull Select Register (PTPSL)
Table 2-31. PTPSL Register Field Descriptions
Field Description
1-0
PTPSL0
Port L Pull Select
This bit selects a pull device on the HVI pin in analog mode for open input detection. By default a pulldown device
is active as part of the input voltage divider. If this bit set to 1 and PTTEL=1 and not in stop mode a pullup to a level
close to VDDX takes effect and overrides the weak pulldown device. Refer to Section 2.5.2, “Open Input Detection
on HVI”).
1 Pullup enabled
0 Pulldown enabled
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Freescale Semiconductor 137
2.3.4.6 Port L Polarity Select Register (PPSL)
2.3.4.7 Port L ADC Bypass Register (PTABYPL)
Address 0x0334 PPSL Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R 0 0 0 0 0 0 0
PPSL0(2)
2. Only available for S12ZVMC256
W
Reset00000000
Figure 2-28. Port L Polarity Select Register (PPSL)
Table 2-32. PPSL Register Field Descriptions
Field Description
1-0
PPSL0
Polarity Select
This bit selects the polarity of the active interrupt edge on the associated HVI pin.
1 Rising edge selected
0 Falling edge selected
Address 0x033A Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R 0 0 0 0 0 0 0
PTABYPL0(2)
2. Only available for S12ZVMC256
W
Reset00000000
Figure 2-29. Port L ADC Bypass Register (PTABYPL)
Table 2-33. PTABYPL Register Field Descriptions
Field Description
1-0
PTABYPL0
Port L ADC Connection Bypass
This bit bypasses and powers down the impedance converter stage in the signal path from the analog input pin to
the ADC channel input. This bit takes effect only if using direct input connection to the ADC channel (PTADIRL=1).
1 Impedance converter bypassed
0 Impedance converter used
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138 Freescale Semiconductor
2.3.4.8 Port L ADC Direct Register (PTADIRL)
2.3.4.9 Port L Digital Input Enable Register (DIENL)
Address 0x033B Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R 0 0 0 0 0 0 0
PTADIRL0(2)
2. Only available for S12ZVMC256
W
Reset00000000
Figure 2-30. Port L ADC Direct Register (PTADIRL)
Table 2-34. PTADIRL Register Field Descriptions
Field Description
1-0
PTADIRL0
Port L ADC Direct Connection
This bit connects the analog input signal directly to the ADC channel bypassing the voltage divider. This bit takes
effect only in analog mode (PTAENL=1).
1 Input pin directly connected to ADC channel
0 Input voltage divider active on analog input to ADC channel
Address 0x33C Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0000000
DIENL0(2)
2. Only available for S12ZVMC256
W
Reset00000000
Figure 2-31. Port L Digital Input Enable Register (DIENL)
Table 2-35. DIENL Register Field Descriptions
Field Description
0
DIENL
Digital Input Enable Port L — Input buffer control
This bit controls the HVI digital input function. If set to 1 the input buffers are enabled and the pin can be used with
the digital function. If the analog input function is enabled (PTAL[PTAENL]=1) the input buffer of the selected HVI pin
is forced off(1) in run mode and is released to be active in stop mode only if DIENL=1.
1 Associated pin digital input is enabled if not used as analog input in run mode1
0 Associated pin digital input is disabled1
1. Refer to PTTEL bit description in Section 2.3.4.11, “Port L Input Divider Ratio Selection Register (PIRL) for an override condition.
Chapter 2 Port Integration Module (S12ZVMPIMV3)
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Freescale Semiconductor 139
2.3.4.10 Port L ADC Connection Enable Register (PTAENL)
2.3.4.11 Port L Input Divider Ratio Selection Register (PIRL)
Address 0x033D Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R 0 0 0 0 0 0 0
PTAENL0(2)
2. Only available for S12ZVMC256
W
Reset00000000
Figure 2-32. Port L ADC Connection Enable Register (PTAENL)
Table 2-36. PTAENL Register Field Descriptions
Field Description
1-0
PTAENL0
Port L ADC Connection Enable
This bit enables the analog signal link to an ADC channel. If set to 1 the analog input function takes precedence over
the digital input in run mode by forcing off the input buffer if not overridden by PTTEL=1.
Note: When enabling the resistor paths to ground by setting PTAENL=1, a delay of tUNC_HVI + two bus cycles must
be accounted for.
1 ADC connection enabled
0 ADC connection disabled
Address 0x033E Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0000000
PIRL0(2)
2. Only available for S12ZVMC256
W
Reset00000000
Figure 2-33. Port L Input Divider Ratio Selection Register (PIRL)
Table 2-37. PIRL Register Field Descriptions
Field Description
1-0
PIRL0
Port L Input Divider Ratio Select
This bit selects one of two voltage divider ratios for the associated HVI pin in analog mode.
1Ratio
L_HVI selected
0Ratio
H_HVI selected
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140 Freescale Semiconductor
2.3.4.12 Port L Test Enable Register (PTTEL)Port L Input Divider Ratio Selection
2.4 Functional Description
2.4.1 General
Each pin except BKGD can act as general-purpose I/O. In addition each pin can act as an output or input
of a peripheral module.
2.4.2 Registers
Table 2-39 lists the implemented configuration bits which are available on each port. These registers
except the pin input registers can be written at any time, however a specific configuration might not
become active. For example a pullup device does not become active while the port is used as a push-pull
output.
Unimplemented bits read zero.
Address 0x033F Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0000000
PTTEL0(2)
2. Only available for S12ZVMC256
W
Reset00000000
Figure 2-34. Port L Test Enable Register (PTTEL)
Table 2-38. PTTEL Register Field Descriptions
Field Description
1-0
PTTEL0
Port L Test Enable
This bit forces the input buffer of the HVI pin active while using the analog function to support open input detection
in run mode. Refer to Section 2.5.2, “Open Input Detection on HVI”). In stop mode this bit has no effect.
Note: In direct mode (PTADIRL=1) the digital input buffer is not enabled.
1 Input buffer enabled when used with analog function and not in direct mode (PTADIRL=0)
0 Input buffer disabled when used with analog function
Table 2-39. Bit Indices of Implemented Register Bits per Port
Port Data
Register
Port
Input
Register
Data
Direction
Register
Pull
Device
Enable
Register
Polarity
Select
Register
Port
Interrupt
Enable
Register
Port
Interrupt
Flag
Register
Digital
Input
Enable
Register
Reduced
Drive
Register
Wired-Or
Mode
Register
Port PT PTI DDR PER PPS PIE PIF DIE RDR WOM
E1-01-01-01-01-0-----
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Freescale Semiconductor 141
Table 2-40 shows the effect of enabled peripheral features on I/O state and enabled pull devices.
ADH 0(1) 01010101010101--
ADL 7-0 7-0 7-0 7-0 7-0 7-0 7-0 7-0 - -
T3-03-03-03-03-0-----
S5-0
(2) 5-025-025-025-025-025-02--5-0
2
P2-0
(3) 2-032-032-032-032-032-03-0-
L(4) -0 - - 0000- -
1. 7-0 for ZVMC256
2. 3-0 for ZVMC256
3. 1-0 for ZVMC256
4. Only available for ZVMC256
Table 2-40. Effect of Enabled Features
Enabled
Feature(1) Related Signal(s) Effect on
I/O state
Effect on enabled
pull device
CPMU OSC EXTAL, XTAL CPMU takes control Forced off
TIM0 output compare IOC0_x Forced output Forced off
TIM0 input capture IOC0_x None(2) None(3)
TIM1 output compare IOC1_x Forced output Forced off
TIM1 input capture IOC1_x None(4) None(5)
SPI0 MISO0, MOSI0, SCK0, SS0 Controlled input/output Forced off if output
SCIx transmitter TXDx Forced output Forced off
SCIx receiver RXDx Forced input None3
MSCAN0 TXCAN0 Forced output Forced off
RXCAN0 Forced input Pulldown forced off
S12ZDBG PDO, PDOCLK Forced output Forced off
DBGEEV None2None3
PTU PTURE, PTUT1-0 Forced output Forced off
PWM channel PWMx_x Forced output Forced off
PMF fault input FAULT5 Forced input None3
Table 2-39. Bit Indices of Implemented Register Bits per Port
Port Data
Register
Port
Input
Register
Data
Direction
Register
Pull
Device
Enable
Register
Polarity
Select
Register
Port
Interrupt
Enable
Register
Port
Interrupt
Flag
Register
Digital
Input
Enable
Register
Reduced
Drive
Register
Wired-Or
Mode
Register
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142 Freescale Semiconductor
2.4.3 Pin I/O Control
Figure 2-35 illustrates the data paths to and from an I/O pin. Input and output data can always be read via
the input register (PTIx, Section 2.3.3.2, “Port Input Register”) independent if the pin is used as general-
purpose I/O or with a shared peripheral function. If the pin is configured as input (DDRx=0,
Section 2.3.3.3, “Data Direction Register”), the pin state can also be read through the data register (PTx,
Section 2.3.3.1, “Port Data Register”).
The general-purpose data direction configuration can be overruled by an enabled peripheral function
shared on the same pin (Table 2-40). If more than one peripheral function is available and enabled at the
same time, the highest ranked module according the predefined priority scheme in Table 2-7 will take
precedence on the pin.
ADCx ANx_y None2 (6) None3
VRH, VRL
AMPx AMPx, AMPPx, AMPMx None2 6None3
IRQ IRQ Forced input None3
XIRQ XIRQ Forced input None3
LINPHY0/
HVPHY0
LPTXD0 Forced input None3
LPRXD0 Forced output Forced off
1. If applicable the appropriate routing configuration must be set for the signals to take effect on the pins.
2. DDR maintains control
3. PER/PPS maintain control
4. DDR maintains control
5. PER/PPS maintain control
6. To use the digital input function the related bit in Digital Input Enable Register (DIENADx) must be set to logic
level “1”.
Table 2-40. Effect of Enabled Features
Enabled
Feature(1) Related Signal(s) Effect on
I/O state
Effect on enabled
pull device
Chapter 2 Port Integration Module (S12ZVMPIMV3)
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Freescale Semiconductor 143
Figure 2-35. Illustration of I/O pin functionality
2.4.4 Interrupts
This section describes the interrupts generated by the PIM and their individual sources. Vector addresses
and interrupt priorities are defined at MCU level.
2.4.4.1 XIRQ, IRQ Interrupts
The XIRQ pin allows requesting non-maskable interrupts after reset initialization. During reset, the X bit
in the condition code register is set and any interrupts are masked until software enables them.
The IRQ pin allows requesting asynchronous interrupts. The interrupt input is disabled out of reset. To
enable the interrupt the IRQCR[IRQEN] bit must be set and the I bit cleared in the condition code register.
The interrupt can be configured for level-sensitive or falling-edge-sensitive triggering. If IRQCR[IRQEN]
is cleared while an interrupt is pending, the request will deassert.
Table 2-41. PIM Interrupt Sources
Module Interrupt Sources Local Enable
XIRQ None
IRQ IRQCR[IRQEN]
Port AD pin interrupt PIEADH[PIEADH7-PIEADH0]
PIEADL[PIEADL7-PIEADL0]
Port S pin interrupt PIES[PIES5-PIES0]
Port P pin interrupt PIEP[PIEP2-PIEP0]
Port L pin interrupt PIEL[PIEL0]
PP0 over-current interrupt PIEP[OCIE1]
PTx
DDRx
output enable
port enable
1
0
1
0
PIN
data out
Periph.
data in
Module
1
0
synch.
PTIx
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144 Freescale Semiconductor
Both interrupts are capable to wake-up the device from stop mode. Means for glitch filtering are not
provided on these pins.
2.4.5 Pin interrupts and Key-Wakeup (KWU)
Ports AD, S, P and L offer pin interrupt and key-wakeup capability. The related interrupt enable (PIE) as
well as the sensitivity to rising or falling edges (PPS) can be individually configured on per -pin basis. All
bits/pins in a port share the same interrupt vector . Interrupts can be used with the pins configured as inputs
or outputs.
An interrupt is generated when a bit in the port interrupt flag (PIF) and its corresponding port interrupt
enable (PIE) are both set. The pin interrupt feature is also capable to wake up the CPU when it is in stop
or wait mode (key-wakeup).
A digital filter on each pin prevents short pulses from generating an interrupt. A valid edge on an input is
detected if 4 consecutive samples of a passive level are followed by 4 consecutive samples of an active
level. Else the sampling logic is restarted.
In run and wait mode the filters are continuously clocked by the bus clock. Pulses with a duration of
tPULSE <n
P_MASK/fbus are assuredly filtered out while pulses with a duration of tPULSE >n
P_PASS/fbus
guarantee a pin interrupt.
In stop mode the filter clock is generated by an RC-oscillator. The minimum pulse length varies over
process conditions, temperature and voltage (Figure 2-36). Pulses with a duration of tPULSE < tP_MASK are
assuredly filtered out while pulses with a duration of tPULSE > tP_PASS guarantee a wakeup event.
Please refer to the appendix table “Pin Timing Characteristics” for pulse length limits.
To maximize current saving the RC oscillator is active only if the following condition is true on any
individual pin:
individual pin:
Sample count <= 4 (at active or passive level) and interrupt enabled (PIE[x]=1) and interrupt flag not set
(PIF[x]=0).
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Freescale Semiconductor 145
Figure 2-36. Interrupt Glitch Filter (here: active low level selected)
2.4.6 Over-Current Interrupt
In case of an over-current condition on PP0 (see Section 2.5.2, “Open Input Detection on HVI”) the over -
current interrupt flag PIFP[OCIF1] a sserts. This flag generates an interrupt if the enable bit PIEP[OCIE1]
is set.
An asserted flag immediately forces the output pin low to protect the device. The flag must be cleared to
re-enable the driver.
2.4.7 High-Voltage Input
A high-voltage input (HVI) on port L has the following features:
Input voltage proof up to VHVI
Digital input function with pin interrupt and wakeup from stop capability
Analog input function with selectable divider ratio routable to ADC channel. Optional direct input
bypassing voltage divider and impedance converter. Capable to wakeup from stop (pin interrupts
in run mode not available). Open input detection.
Figure 2-37 shows a block diagram of the HVI.
NOTE
The term stop mode (STOP) is limited to voltage regulator operating in
reduced performance mode (RPM). Refer to “Low Power Modes” section
in device overview.
Glitch, filtered out, no interrupt flag set
Valid pulse, interrupt flag set uncertain
tP_MASK tP_PASS
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Figure 2-37. HVI Block Diagram
Voltages up to VHVI can be applied to the HVI pin. Internal voltage dividers scale the input signals down
to logic level. There are two modes, digital and analog, where these signals can be processed.
2.4.7.1 Digital Mode Operation
In digital mode (PTAENL=0) the input buffer is enabled if DIENL=1. The synchronized pin input state
determined at threshold level VTH_HVI can be read in register PTIL. Interrupt flag (PIFL) is set on input
transitions if enabled (PIEL=1) and configured for the related edge polarity (PPSL). Wakeup from stop
mode is supported.
2.4.7.2 Analog Mode Operation
In analog mode (PTAENL=1) the input buffer is forced of f and the voltage applied to a selectable HVI pin
can be measured on its related internal ADC channel(refer to device overview section for channel
assignment). One of two input divider ratios (RatioH_HVI, RatioL_HVI) can be chosen (PIRL) on the analog
PL (HVI)
PTIL
PIRL
ADC
REXT_HVI
PTAENL
VHVI
(DIENL & (PTAENL | STOP))
Input Buffer
Impedance
Converter
PTAENL
& STOP & PTADIRL
PTAENL
& STOP & PTADIRL
VDDX
& STOP
PTAENL
| (PTAENL & PTADIRL & PTTEL & STOP)
40K
500K
110K
440K
PTAENL
& PTTEL
& PTPSL
& PTADIRL
& PTABYPL
10K
& PTADIRL
& STOP
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Freescale Semiconductor 147
input or the voltage divider can be bypassed (PTADIRL=1). Additionally in latter case the impedance
converter in the ADC signal path can be used or bypassed in direct input mode (PTABYPL).
Out of reset the digital input buffer of the selected pin is disabled to avoid shoot-through current. Thus pin
interrupts can only be generated if DIENL=1.
In stop mode (RPM) the digital input buffer is enab led only if DIENL=1 to support wakeup functionality.
Table 2-42 shows the HVI input configuration depending on register bits and operation mode.
NOTE
An external resistor REXT_HVI must always be connected to the high-
voltage input to protect the device pins from fast transients and to achieve
the specified pin input divider ratios when using the HVI in analog mode.
2.5 Initialization and Application Information
2.5.1 Port Data and Data Direction Register writes
It is not recommended to write PORTx/PTx and DDRx in a word access. When changing the register pins
from inputs to outputs, the data may have extra transitions during the write access. Initialize the port data
register before enabling the outputs.
2.5.2 Open Input Detection on HVI
The connection of an external pull device on a high-voltage input can be validated by using the built-in
pull functionality of the HVI. Depending on the application type an external pull-down circuit can be
detected with the internal pull-up device whereas an external pull-up circuit can be detected with the
internal pull-down device which is part of the input voltage divider.
Note that the following procedures make use of a function that overrides the automatic disable mechanism
of the digital input buffer when using the HVI in analog mode. Make sure to switch off the override
function when using the HVI in analog mode after the check has been completed.
Table 2-42. HVI Input Configurations
Mode DIENL PTAENL Digital Input Analog Input Resulting Function
Run 0 0 off off Input disabled (Reset)
01 off
1enabled Analog input, interrupt not supported
1 0 enabled off Digital input, interrupt supported
11off
(1)
1. Enabled if PTTEL=1 & PTADIRL=0)
enabled Analog input, interrupt not supported
Stop(2)
2. The term “stop mode” is limited to voltage regulator operating in reduced performance mode (RPM; refer to “Low Power
Modes” section in device overview). In any other case the HVI input configuration defaults to “run mode”. Therefore set
PTAENL=0 before entering stop mode in order to generally support wakeup from stop.
0 X off off Input disabled, wakeup from stop not supported
1 X enabled off Digital input, wakeup from stop supported
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External pulldown device (Figure 2-38):
1. Enable analog function on HVI in non-direct mode (PTAL[PTAENL]=1, PTAL[PTADIRL]=0)
2. Select internal pullup device on HVI (PTAL[PTPSL]=1)
3. Enable function to force input buffer active on HVI in analog mode (PTAL[PTTEL]=1)
4. Verify PTIL=0 for a connected external pulldown device; read PTIL=1 for an open input
Figure 2-38. Digital Input Read with Pullup Enabled
External pullup device (Figure 2-39):
1. Enable analog function on HVI in non-direct mode (PTAL[PTAENL]=1, PTAL[PTADIRL]=0)
2. Select internal pulldown device on HVI (PTAL[PTPSL]=0)
3. Enable function to force input buffer active on HVI in analog mode (PTAL[PTTEL]=1)
4. Verify PTIL=1 for a connected external pullup device; read PTIL=0 for an open input
HVI
40K
500K
VDDX
Digital in
110K / 550K
min. 1/10 * V
DDX
10K
PIRL=0 / PIRL=1
HV Supply
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Figure 2-39. Digital Input Read with Pulldown Enabled
2.5.3 Over-Current Protection on EVDD1
Pin PP0 can be used as general-purpose I/O or due to its increased current capability in output mode as a
switchable external power supply pin (EVDD1) for external devices like Hall sensors.
EVDD1 is supplied by the digital pad supply VDDX.
An over -current monitor is implemented to protect the controller from short circuits or exces s currents on
the output which can only arise if the pin is configured for full drive. Although the full drive current is
available on the high and low side, the protection is only available on the high side with a current direction
from EVDD1 to VSSX. There is also no protection to voltages higher than VDDX.
To enable the over-current monitor set the related OCPE1 bit in register PIMMISC.
In stop mode the over-current monitor is disabled for power saving. The increased current capability
cannot be maintained to supply the external device. Therefore when using the pin as power supply the
external load must be powered down prior to entering stop mode by driving the output low.
An over-current condition is detected if the output current level exceeds the threshold IOCD in run mode.
The output driver is immediately forced low and the over-current interrupt flag OCIFx asserts. Refer to
Section 2.4.6, “Over-Current Interrupt”.
HVI
40K
610K / 1050K
Digital in
max. 10/11 * V
HVI
(PIRL=0)
PIRL=0 / PIRL=1
max. 21/22 * V
HVI
(PIRL=1)
10K
HV Supply
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Chapter 3
Memory Mapping Control (S12ZMMCV1)
Table 3-1. Revision History
3.1 Introduction
The S12ZMMC module controls the access to all internal memories and peripherals for the S12ZCPU, and
the S12ZBDC module. It also provides access to the RAM for ADCs and the PTU module. The S12ZMMC
determines the address mapping of the on-chip resources, regulates access priorities and enforces memory
protection. Figure 3-1 shows a block diagram of the S12ZMMC module.
Revision
Number Revision Date Sections
Affected Description of Changes
V01.03 27 Jul 2012 Corrected Ta bl e 3- 9
V01.04 27 Jul 2012 Added feature tags
V01.05 6 Aug 2012 Fixed wording
V01.06 12 Feb 2013
Figure 3-8
3.3.2.2/3-156
Changed “KByte:to “KB”
Corrected the description of the MMCECH/L register
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3.1.1 Glossary
3.1.2 Overview
The S12ZMMC provides access to on-chip memories and peripherals for the S12ZCPU, the S12ZBDC,
the PTU, and the ADC. It arbitrates memory accesses and determines all of the MCU memory maps.
Furthermore, the S12ZMMC is responsible for selecting the MCUs functional mode.
3.1.3 Features
S12ZMMC mode operation control
Memory mapping for S12ZCPU and S12ZBDC, PTU and ADCs
Maps peripherals and memories into a 16 MByte address space for the S12ZCPU, the
S12ZBDC, the PTU, and the ADCs
Handles simultaneous accesses to different on-chip resources (NVM, RAM, and peripherals)
Access violation detection and logging
Triggers S12ZCPU machine exceptions upon detection of illegal memory accesses and
uncorrectable ECC errors
Logs the state of the S12ZCPU and the cause of the access error
Table 3-2. Glossary Of Terms
Term Definition
MCU Microcontroller Unit
CPU S12Z Central Processing Unit
BDC S12Z Background Debug Controller
ADC Analog-to-Digital Converter
PTU Programmable Trigger Unit
unmapped
address range Address space that is not assigned to a memory
reserved address
range Address space that is reserved for future use cases
illegal access Memory access, that is not supported or prohibited by the S12ZMMC, e.g. a data store to NVM
access violation Either an illegal access or an uncorrectable ECC error
byte 8-bit data
word 16-bit data
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3.1.4 Modes of Operation
3.1.4.1 Chip configuration modes
The S12ZMMC determines the chip configuration mode of the device. It captures the s tate of the MODC
pin at reset and provides the ability to switch from special-single chip mode to normal single chip-mode.
3.1.4.2 Power modes
The S12ZMMC module is only active in run and wait mode.There is no bus activity in stop mode.
3.1.5 Block Diagram
e
Figure 3-1. S12ZMMC Block Diagram
3.2 External Signal Description
The S12ZMMC uses two external pins to determine the devices operating mode: RESET and MODC
(Table 3-3)
See device overview for the mapping of these signals to device pins.
Table 3-3. External System Pins Associated With S12ZMMC
Pin Name Description
RESET External reset signal. The RESET signal is active low.
MODC This input is captured in bit MODC of the MODE register when the external RESET pin deasserts.
Memory Protection
Crossbar Switch
Register
Block
Run Mode Controller
S12ZCPU S12ZBDC ADCs, PTU
EEPROM RAM Peripherals
Program
Flash
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3.3 Memory Map and Register Definition
3.3.1 Memory Map
A summary of the registers associated with the MMC block is shown in Figure 3-2. Detailed descriptions
of the registers and bits are given in the subsections that follow.
3.3.2 Register Descriptions
This section consists of the S12ZMMC control and status register descriptions in address order.
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0070 MODE R MODC 0000000
W
0x0071-
0x007F
Reserved R 0 0 0 0 0 0 0 0
W
0x0080 MMCECH R ITR[3:0] TGT[3:0]
W
0x0081 MMCECL R ACC[3:0] ERR[3:0]
W
0x0082 MMCCCRH R CPUU 0 0 0 0 0 0 0
W
0x0083 MMCCCRL R 0 CPUX 0 CPUI 0 0 0 0
W
0x0084 Reserved R 0 0 0 0 0 0 0 0
W
0x0085 MMCPCH R CPUPC[23:16]
W
0x0086 MMCPCM R CPUPC[15:8]
W
0x0087 MMCPCL R CPUPC[7:0]
W
0x0088-
0x00FF
Reserved R 0 0 0 0 0 0 0 0
W
= Unimplemented or Reserved
Figure 3-2. S12ZMMC Register Summary
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3.3.2.1 Mode Register (MODE)
Read: Anytime.
Write: Only if a transition is allowed (see Figure 3-4).
The MODE register determines the operating mode of the MCU.
CAUTION
Figure 3-4. Mode Transition Diagram
Address: 0x0070
76543210
RMODC 0000000
W
Reset MODC10000000
1. External signal (see Table 3-3).
= Unimplemented or Reserved
Figure 3-3. Mode Register (MODE)
Table 3-4. MODE Field Descriptions
Field Description
7
MODC
Mode Select Bit — This bit determines the current operating mode of the MCU. Its reset value is captured from
the MODC pin at the rising edge of the RESET pin. Figure 3-4 illustrates the only valid mode transition from
special single-chip mode to normal single chip mode.
Reset with
MODC pin = 1 Reset with
MODC pin = 0
Special
Single-Chip
Mode (SS)
Normal
Single-Chip
Mode (NS) write access to
MODE:
1 MODC bit
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3.3.2.2 Error Code Register (MMCECH, MMCECL)
Figure 3-5. Error Code Register (MMCEC)
Read: Anytime
Write: Write of 0xFFFF to MMCECH:MMCECL resets both registers to 0x0000
Table 3-5. MMCECH and MMCECL Field Descriptions
Address: 0x0080 (MMCECH)
76543210
RITR[3:0] TGT[3:0]
W
Reset00000000
Address: 0x0081 (MMCECL)
76543210
RACC[3:0] ERR[3:0]
W
Reset00000000
Field Description
7-4 (MMCECH)
ITR[3:0]
Initiator Field — The ITR[3:0] bits capture the initiator which caused the access violation. The initiator is
captured in form of a 4 bit value which is assigned as follows:
0:none (no error condition detected)
1:S12ZCPU
2:reserved
3:ADC0
4:ADC1
5:PTU
6-15: reserved
3-0 (MMCECH)
TGT[3:0]
Target Field — The TGT[3:0] bits capture the target of the faulty access. The target is captured in form of a
4 bit value which is assigned as follows:
0:none
1:register space
2:RAM
3:EEPROM
4:program flash
5:IFR
6-15: reserved
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The MMCEC register captures debug information about access violations. It is set to a non-zero value if
a S12ZCPU access violation or an uncorrectable ECC error has occurred. At the same time this register is
set to a non-zero value, access information is captured in the MMCPCn and MMCCCRn registers. The
MMCECn, the MMCPCn and the MMCCCRn registers are not updated if the MMCECn registers contain
a non-zero value. The MMCECn registers are cleared by writing the value 0xFFFF.
3.3.2.3 Captured S12ZCPU Condition Code Register (MMCCCRH, MMCCCRL)
Figure 3-6. Captured S12ZCPU Condition Code Register (MMCCCRH, MMCCCRL)
Read: Anytime
Write: Never
7-4 (MMCECL)
ACC[3:0]
Access Type Field — The ACC[3:0] bits capture the type of memory access, which caused the access
violation. The access type is captured in form of a 4 bit value which is assigned as follows:
0:none (no error condition detected)
1:opcode fetch
2:vector fetch
3:data load
4:data store
5-15: reserved
3-0 (MMCECL)
ERR[3:0]
Error Type Field — The EC[3:0] bits capture the type of the access violation. The type is captured in form of
a 4 bit value which is assigned as follows:
0:none (no error condition detected)
1:access to an illegal access
2:uncorrectable ECC error
3-15:reserved
Address: 0x0082 (MMCCCRH)
76543210
RCPUU 0 0 0 0 0 0 0
W
Reset00000000
Address: 0x0083 (MMCCCRL)
76543210
R 0 CPUX 0 CPUI 0 0 0 0
W
Reset00000000
Field Description
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Table 3-6. MMCCCRH and MMCCCRL Field Descriptions
3.3.2.4 Captured S12ZCPU Program Counter (MMCPCH, MMCPCM, MMCPCL)
Figure 3-7. Captured S12ZCPU Program Counter (MMCPCH, MMCPCM, MMCPCL)
Read: Anytime
Write: Never
Field Description
7 (MMCCCRH)
CPUU
S12ZCPU User State Flag — This bit shows the state of the user/supervisor mode bit in the S12ZCPU’s CCR
at the time the access violation has occurred. The S12ZCPU user state flag is read-only; it will be automatically
updated when the next error condition is flagged through the MMCEC register. This bit is undefined if the error
code registers (MMCECn) are cleared.
6 (MMCCCRL)
CPUX
S12ZCPU X-Interrupt Mask— This bit shows the state of the X-interrupt mask in the S12ZCPU’s CCR at the
time the access violation has occurred. The S12ZCPU X-interrupt mask is read-only; it will be automatically
updated when the next error condition is flagged through the MMCEC register. This bit is undefined if the error
code registers (MMCECn) are cleared.
4 (MMCCCRL)
CPUI
S12ZCPU I-Interrupt MaskThis bit shows the state of the I-interrupt mask in the CPU’s CCR at the time the
access violation has occurred. The S12ZCPU I-interrupt mask is read-only; it will be automatically updated
when the next error condition is flagged through the MMCEC register. This bit is undefined if the error code
registers (MMCECn) are cleared.
Address: 0x0085 (MMCPCH)
76543210
R CPUPC[23:16]
W
Reset00000000
Address: 0x0086 (MMCPCM)
76543210
RCPUPC[15:8]
W
Reset00000000
Address: 0x0087 (MMCPCL)
76543210
R CPUPC[7:0]
W
Reset00000000
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Table 3-7. MMCPCH, MMCPCM, and MMCPCL Field Descriptions
3.4 Functional Description
This section provides a complete functional description of the S12ZMMC module.
3.4.1 Global Memory Map
The S12ZMMC maps all on-chip resources into an 16MB address space, the global memory map. The
exact resource mapping is shown in Figure 3-8. The global address space is used by the S12ZCPU, ADCs,
PTU, and the S12ZBDC module.
Field Description
7–0 (MMCPCH)
7–0 (MMCPCM)
7–0 (MMCPCL)
CPUPC[23:0]
S12ZCPU Program Counter Value— The CPUPC[23:0] stores the CPU’s program counter value at the time
the access violation occurred. CPUPC[23:0] always points to the instruction which triggered the violation. These
bits are undefined if the error code registers (MMCECn) are cleared.
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Figure 3-8. Global Memory Map
0x00_1000
0x00_0000
0x10_0000
0x1F_4000
0x80_0000
0xFF_FFFF
RAM
EEPROM
Unmapped
Program NVM
Register Space
4 KB
max. 1 MByte - 4 KB
max. 1 MByte - 48 KB
max. 8 MByte
6 MByte
High address aligned
Low address aligned
0x1F_8000
Unmapped
address range
0x1F_C000
Reserved (read only) 6 KBKB
NVM IFR 256 Byte
Reserved 512 Byte
0x20_0000
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3.4.2 Illegal Accesses
The S12ZMMC module monitors all memory traf fic for illegal accesses. See Table 3-9 for a complete list
of all illegal accesses.
Illegal accesses are reported in several ways:
All illegal accesses performed by the S12ZCPU trigger machine exceptions.
All illegal accesses perfor med through the S12ZBDC interface, are captured in the ILLACC bit of
the BDCCSRL register.
Table 3-9. Illegal memory accesses
S12ZCPU S12ZBDC ADCs and PTU
Register
space
Read access ok ok illegal access
Write access ok ok illegal access
Code execution illegal access
RAM
Read access ok ok ok
Write access ok ok ok
Code execution ok
EEPROM
Read access ok(1)
1. Unsupported NVM accesses during NVM command execution (“collisions”), are treated as illegal accesses.
ok1ok1
Write access illegal access illegal access illegal access
Code execution ok1
Reserved
Space
Read access ok ok illegal access
Write access only permitted in SS mode ok illegal access
Code execution illegal access
Reserved
Read-only
Space
Read access ok ok illegal access
Write access illegal access illegal access illegal access
Code execution illegal access
NVM IFR
Read access ok1ok1illegal access
Write access illegal access illegal access illegal access
Code execution illegal access
Program NVM
Read access ok1ok1ok1
Write access illegal access illegal access illegal access
Code execution ok1
Unmapped
Space
Read access illegal access illegal access illegal access
Write access illegal access illegal access illegal access
Code execution illegal access
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All illegal accesses performed by an ADC or PTU module trigger error interrupts. See ADC and
PTU section for details.
NOTE
Illegal accesses caused by S12ZCPU opcode prefetches will also trigger
machine exceptions, even if those opcodes might not be executed in the
program flow. To avoid these machine exceptions, S12ZCPU instructions
must not be executed from the last (high addresses) 8 bytes of RAM,
EEPROM, and Flash.
3.4.3 Uncorrectable ECC Faults
RAM and flash use error correction codes (ECC) to detect and correct memory corruption. Each
uncorrectable memory corruption, which is detected during a S12ZCPU, ADC or PTU access triggers a
machine exception. Uncorrectable memory corruptions which are detected during a S12ZBDC access, are
captured in the RAMWF or the RDINV bit of the BDCCSRL register.
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Chapter 4
Interrupt (S12ZINTV0)
4.1 Introduction
The INT module decodes the priority of all system exception requests and provides the applicable vector
for processing the exception to the CPU. The INT module supports:
I-bit and X-bit maskable interrupt requests
One non-maskable unimplemented page1 op-code trap
Table 4-1. Revision History
Version
Number
Revision
Date
Effective
Date Description of Changes
V00.01 17 Apr 2009 all Initial version based on S12XINT V2.06
V00.02 14 Jul 2009 all Reduce RESET vectors from three to one.
V00.03 05 Oct 2009 all Removed dedicated ECC machine exception vector and marked vector-table
entry “reserved for future use”.
Added a second illegal op-code vector (to distinguish between SPARE and
TRAP).
V00.04 04 Jun 2010 all Fixed remaining descriptions of RESET vectors.
Split non-maskable hardware interrupts into XGATE software error and
machine exception requests.
Replaced mentions of CCR (old name from S12X) with CCW (new name).
V00.05 12 Jan 2011 all Corrected wrong IRQ vector address in some descriptions.
V00.06 22 Mar 2011 all Added vectors for RAM ECC and NVM ECC machine exceptions. And moved
position to 1E0..1E8.
Moved XGATE error interrupt to vector 1DC.
Remaining vectors accordingly.
Removed illegal address reset as a potential reset source.
V00.07 15 Apr 2011 all Removed illegal address reset as a potential reset source from Exception
vector table as well. Added the other possible reset sources to the table.
Changed register addresses according to S12Z platform definition.
V00.08 02 May 2011 all Reduced machine exception vectors to one.
Removed XGATE error interrupt.
Moved Spurious interrupt vector to 1DC.
Moved vector base address to 010 to make room for NVM non-volatile
registers.
V00.09 12 Aug 2011 all Added: Machine exceptions can cause wake-up from STOP or WAIT
V00.10 21 Feb 2012 all Corrected reset value for INT_CFADDR register
V00.11 02 Jul 2012 all Removed references and functions related to XGATE
V00.12 22 May 2013 all added footnote about availability of “Wake-up from STOP or WAIT by XIRQ
with X bit set” feature
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One non-maskable unimplemented page2 op-code trap
One non-maskable software interrupt (SWI)
One non-maskable system call interrupt (SYS)
One non-maskable machine exception vector request
One spurious interrupt vector request
One system reset vector request
Each of the I-bit maskable interrupt requests can be assigned to one of seven priority levels supporting a
flexible priority scheme . The priority scheme can be used to imple ment nested interrupt capability where
interrupts from a lower level are automatically blocked if a higher level interrupt is being processed.
4.1.1 Glossary
The following terms and abbreviations are used in the document.
4.1.2 Features
Interrupt vector base register (IVBR)
One system reset vector (at address 0xFFFFFC).
One non-maskable unimplemented page1 op-code trap (SPARE) vector (at address vector base1 +
0x0001F8).
One non-maskable unimplemented page2 op-code trap (TRAP) vector (at address vector base1 +
0x0001F4).
One non-maskable software interrupt request (SWI) vector (at address vector base1 + 0x0001F0).
One non-maskable system call interrupt request (SYS) vector (at address vector base1 +
0x00001EC).
One non-maskable machine exception vector request (at address vector base1 + 0x0001E8.
One spurious interrupt vector (at address vector base1 + 0x0001DC).
One X-bit maskable interrupt vector request associated with XIRQ (at address vector base1 +
0x0001D8).
Table 4-2. Terminology
Term Meaning
CCW Condition Code Register (in the S12Z CPU)
DMA Direct Memory Access
INT Interrupt
IPL Interrupt Processing Level
ISR Interrupt Service Routine
MCU Micro-Controller Unit
IRQ refers to the interrupt request associated with the IRQ pin
XIRQ refers to the interrupt request associated with the XIRQ pin
1. The vector base is a 24-bit address which is accumulated from the contents of the interrupt vector base register (IVBR, used
as the upper 15 bits of the address) and 0x000 (used as the lower 9 bits of the address).
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One I-bit maskable interrupt vector request associated with IRQ (at address vector base1 +
0x0001D4).
up to 1 13 additional I-bit maskable interrupt vector requests (at addresses vector base1 + 0x000010
.. vector base + 0x0001D0).
Each I-bit maskable interrupt request has a configurable priority level.
I-bit maskable interrupts can be nested, depending on their priority levels.
Wakes up the system from stop or wait mode when an appropriate interrupt request occurs or
whenever XIRQ is asserted, even if X interrupt is masked.
4.1.3 Modes of Operation
Run mode
This is the basic mode of operation.
Wait mode
In wait mode, the INT module is capable of waking up the CPU if an eligible CPU exception
occurs. Please refer to Section 4.5.3, “Wake Up from Stop or Wait Mode” for details.
Stop Mode
In stop mode, the INT module is capable of waking up the CPU if an eligible CPU exception
occurs. Please refer to Section 4.5.3, “Wake Up from Stop or Wait Mode” for details.
4.1.4 Block Diagram
Figure 4-1 shows a block diagram of the INT module.
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Figure 4-1. INT Block Diagram
4.2 External Signal Description
The INT module has no external signals.
4.3 Memory Map and Register Definition
This section provides a detailed description of all registers accessible in the INT module.
4.3.1 Module Memory Map
Table 4-3 gives an overview over all INT module registers.
Table 4-3. INT Memory Map
Address Use Access
0x000010–0x000011 Interrupt Vector Base Register (IVBR) R/W
0x000012–0x000016 RESERVED
0x000017 Interrupt Request Configuration Address Register
(INT_CFADDR)
R/W
0x000018 Interrupt Request Configuration Data Register 0
(INT_CFDATA0)
R/W
Wake Up
Current
IVBR
One Set Per Channel
Interrupt
Requests
Interrupt Requests CPU
Vector
Address
New
IPL
IPL
(Up to 117 Channels)
PRIOLVLnPriority Level
= configuration bits from the associated
channel configuration register
IVBR = Interrupt Vector Base
IPL = Interrupt Processing Level
PRIOLVL0
PRIOLVL1
PRIOLVL2
Peripheral
To C PU
Priority
Decoder
Non I Bit Maskable
Channels
Priority
Level
Filter
Highest Pending
IPL
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4.3.2 Register Descriptions
This section describes in address order all the INT module registers and their individual bits.
0x000019 Interrupt Request Configuration Data Register 1
(INT_CFDATA1)
R/W
0x00001A Interrupt Request Configuration Data Register 2
(INT_CFDATA2
R/W
0x00001B Interrupt Request Configuration Data Register 3
(INT_CFDATA3)
R/W
0x00001C Interrupt Request Configuration Data Register 4
(INT_CFDATA4)
R/W
0x00001D Interrupt Request Configuration Data Register 5
(INT_CFDATA5)
R/W
0x00001E Interrupt Request Configuration Data Register 6
(INT_CFDATA6)
R/W
0x00001F Interrupt Request Configuration Data Register 7
(INT_CFDATA7)
R/W
Address Register
Name Bit 7 6 5 4 3 2 1 Bit 0
0x000010 IVBR R IVB_ADDR[15:8]
W
0x000011 R IVB_ADDR[7:1] 0
W
0x000017 INT_CFADDR R 0 INT_CFADDR[6:3] 000
W
0x000018 INT_CFDATA0 R 0 0 0 0 0 PRIOLVL[2:0]
W
0x000019 INT_CFDATA1 R 0 0 0 0 0 PRIOLVL[2:0]
W
0x00001A INT_CFDATA2 R 0 0 0 0 0 PRIOLVL[2:0]
W
0x00001B INT_CFDATA3 R 0 0 0 0 0 PRIOLVL[2:0]
W
0x00001C INT_CFDATA4 R 0 0 0 0 0 PRIOLVL[2:0]
W
= Unimplemented or Reserved
Figure 4-2. INT Register Summary
Table 4-3. INT Memory Map
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4.3.2.1 Interrupt Vector Base Register (IVBR)
Read: Anytime
Write: Anytime
4.3.2.2 Interrupt Request Configuration Address Register (INT_CFADDR)
Read: Anytime
0x00001D INT_CFDATA5 R 0 0 0 0 0 PRIOLVL[2:0]
W
0x00001E INT_CFDATA6 R 0 0 0 0 0 PRIOLVL[2:0]
W
0x00001F INT_CFDATA7 R 0 0 0 0 0 PRIOLVL[2:0]
W
Address: 0x000010
1514131211109876543210
RIVB_ADDR[15:1] 0
W
Reset1111111111111110
Figure 4-3. Interrupt Vector Base Register (IVBR)
Table 4-4. IVBR Field Descriptions
Field Description
15–1
IVB_ADDR
[15:1]
Interrupt Vector Base Address Bits — These bits represent the upper 15 bits of all vector addresses. Out
of reset these bits are set to 0xFFFE (i.e., vectors are located at 0xFFFE00–0xFFFFFF).
Note: A system reset will initialize the interrupt vector base register with “0xFFFE” before it is used to
determine the reset vector address. Therefore, changing the IVBR has no effect on the location of the
reset vector (0xFFFFFC–0xFFFFFF).
Address: 0x000017
76543210
R0 INT_CFADDR[6:3] 000
W
Reset00001000
= Unimplemented or Reserved
Figure 4-4. Interrupt Configuration Address Register (INT_CFADDR)
Address Register
Name Bit 7 6 5 4 3 2 1 Bit 0
= Unimplemented or Reserved
Figure 4-2. INT Register Summary
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Write: Anytime
4.3.2.3 Interrupt Request Configuration Data Registers (INT_CFDATA0–7)
The eight register window visible at addresses INT_CFDATA0–7 contains the configuration data for the
block of eight interrupt requests (out of 128) selected by the interrupt configuration address register
(INT_CFADDR) in ascending order. INT_CFDATA0 represents the interrupt configuration data register
of the vector with the lowest address in this block, while INT_CFDATA7 represents the interrupt
configuration data register of the vector with the highest address, respectively.
Table 4-5. INT_CFADDR Field Descriptions
Field Description
6–3
INT_CFADDR[6:3]
Interrupt Request Configuration Data Register Select Bits — These bits determine which of the 128
configuration data registers are accessible in the 8 register window at INT_CFDATA0–7.
The hexadecimal value written to this register corresponds to the upper 4 bits of the vector number
(multiply with 4 to get the vector address offset).
If, for example, the value 0x70 is written to this register, the configuration data register block for the 8
interrupt vector requests starting with vector at address (vector base + (0x70*4 = 0x0001C0)) is selected
and can be accessed as INT_CFDATA0–7.
Address: 0x000018
76543210
R00000 PRIOLVL[2:0]
W
Reset00000001
(1)
1. Please refer to the notes following the PRIOLVL[2:0] description below.
= Unimplemented or Reserved
Figure 4-5. Interrupt Request Configuration Data Register 0 (INT_CFDATA0)
Address: 0x000019
76543210
R00000 PRIOLVL[2:0]
W
Reset00000001
(1)
1. Please refer to the notes following the PRIOLVL[2:0] description below.
= Unimplemented or Reserved
Figure 4-6. Interrupt Request Configuration Data Register 1 (INT_CFDATA1)
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Address: 0x00001A
76543210
R00000 PRIOLVL[2:0]
W
Reset00000001
(1)
1. Please refer to the notes following the PRIOLVL[2:0] description below.
= Unimplemented or Reserved
Figure 4-7. Interrupt Request Configuration Data Register 2 (INT_CFDATA2)
Address: 0x00001B
76543210
R00000 PRIOLVL[2:0]
W
Reset00000001
(1)
1. Please refer to the notes following the PRIOLVL[2:0] description below.
= Unimplemented or Reserved
Figure 4-8. Interrupt Request Configuration Data Register 3 (INT_CFDATA3)
Address: 0x00001C
76543210
R00000 PRIOLVL[2:0]
W
Reset00000001
(1)
1. Please refer to the notes following the PRIOLVL[2:0] description below.
= Unimplemented or Reserved
Figure 4-9. Interrupt Request Configuration Data Register 4 (INT_CFDATA4)
Address: 0x00001D
76543210
R00000 PRIOLVL[2:0]
W
Reset00000001
(1)
1. Please refer to the notes following the PRIOLVL[2:0] description below.
= Unimplemented or Reserved
Figure 4-10. Interrupt Request Configuration Data Register 5 (INT_CFDATA5)
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Read: Anytime
Write: Anytime
Address: 0x00001E
76543210
R00000 PRIOLVL[2:0]
W
Reset00000001
(1)
1. Please refer to the notes following the PRIOLVL[2:0] description below.
= Unimplemented or Reserved
Figure 4-11. Interrupt Request Configuration Data Register 6 (INT_CFDATA6)
Address: 0x00001F
76543210
R00000 PRIOLVL[2:0]
W
Reset00000001
(1)
1. Please refer to the notes following the PRIOLVL[2:0] description below.
= Unimplemented or Reserved
Figure 4-12. Interrupt Request Configuration Data Register 7 (INT_CFDATA7)
Table 4-6. INT_CFDATA0–7 Field Descriptions
Field Description
2–0
PRIOLVL[2:0]
Interrupt Request Priority Level Bits — The PRIOLVL[2:0] bits configure the interrupt request priority level of
the associated interrupt request. Out of reset all interrupt requests are enabled at the lowest active level (“1”).
Please also refer to Tabl e 4-7 for available interrupt request priority levels.
Note: Write accesses to configuration data registers of unused interrupt channels are ignored and read
accesses return all 0s. For information about what interrupt channels are used in a specific MCU, please
refer to the Device Reference Manual for that MCU.
Note: When non I-bit maskable request vectors are selected, writes to the corresponding INT_CFDATA
registers are ignored and read accesses return all 0s. The corresponding vectors do not have
configuration data registers associated with them.
Note: Write accesses to the configuration register for the spurious interrupt vector request
(vector base + 0x0001DC) are ignored and read accesses return 0x07 (request is handled by the CPU,
PRIOLVL = 7).
Table 4-7. Interrupt Priority Levels
Priority PRIOLVL2 PRIOLVL1 PRIOLVL0 Meaning
0 0 0 Interrupt request is disabled
low 0 0 1 Priority level 1
0 1 0 Priority level 2
0 1 1 Priority level 3
1 0 0 Priority level 4
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4.4 Functional Description
The INT module processes all exception requests to be serviced by the CPU module. These exceptions
include interrupt vector requests and reset vector requests. Each of these exception types and their overall
priority level is discussed in the subsections below.
4.4.1 S12Z Exception Requests
The CPU handles both reset requests and interrupt requests. The INT module contains registers to
configure the priority level of each I-bit maskable interrupt request which can be used to implement an
interrupt priority scheme. This also includes the possibility to nest interrupt requests. A priority decoder is
used to evaluate the relative priority of pending interrupt requests.
4.4.2 Interrupt Prioritization
After system reset all I-bit maskable interrupt requests are configured to be enabled, are set up to be
handled by the CPU and have a pre-configured priority level of 1. Exceptions to this rule are the non-
maskable interrupt requests and the spurious interrupt vector request at (vector base + 0x0001DC) which
cannot be disabled, are always handled by the CPU and have a fixed priority levels. A priority level of 0
effectively disables the associated I-bit maskable interrupt request.
If more than one interrupt request is configured to the same interrupt priority level the interrupt request
with the higher vector address wins the prioritization.
The following conditions must be met for an I-bit maskable interrupt request to be processed.
1. The local interrupt enabled bit in the peripheral module must be set.
2. The setup in the configuration register associated with the interrupt request channel must meet the
following conditions:
a) The priority level must be set to non zero.
b) The priority level must be greater than the current interrupt processing level in the condition
code register (CCW) of the CPU (PRIOLVL[2:0] > IPL[2:0]).
3. The I-bit in the condition code register (CCW) of the CPU must be cleared.
4. There is no access violation interrupt request pending.
5. There is no SYS, SWI, SPARE, TRAP, Machine Exception or XIRQ request pending.
1 0 1 Priority level 5
1 1 0 Priority level 6
high 1 1 1 Priority level 7
Table 4-7. Interrupt Priority Levels
Priority PRIOLVL2 PRIOLVL1 PRIOLVL0 Meaning
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NOTE
All non I-bit maskable interrupt requests always have higher priority than I-
bit maskable interrupt requests. If an I-bit maskable interrupt request is
interrupted by a non I-bit maskable interrupt request, the currently active
interrupt processing level (IPL) remains unaffected. It is possible to nest
non I-bit maskable interrupt requests, e.g., by nesting SWI, SYS or TRAP
calls.
4.4.2.1 Interrupt Priority Stack
The current interrupt processing level (IPL) is stored in the condition code register (CCW) of the CPU.
This way the current IPL is automatically pushed to the stack by the standard interrupt stacking procedure.
The new IPL is copied to the CCW from the priority level of the highest priority active interrupt request
channel which is configured to be handled by the CPU. The copying takes place when the interrupt vector
is fetched. The previous IPL is automatically restored from the stack by executing the RTI instruction.
4.4.3 Priority Decoder
The INT module contains a priority decoder to determine the relative priority for all interrupt requests
pending for the CPU.
A CPU interrupt vector is not supplied until the CPU requests it. Therefore, it is possible that a higher
priority interrupt request could override the original exception which caused the CPU to request the vector .
In this case, the CPU will receive the highest priority vector and the system will process this exception first
instead of the original request.
If the interrupt source is unknown (for example, in the case where an interrupt request becomes inactive
after the interrupt has been recognized, but prior to the vector request), the vector address supplied to the
CPU defaults to that of the spurious interrupt vector.
NOTE
Care must be taken to ensure that all exception requests remain active until
the system begins execution of the applicable service routine; otherwise, the
exception request may not get processed at all or the result may be a
spurious interrupt request (vector at address (vector base + 0x0001DC)).
4.4.4 Reset Exception Requests
The INT module supports one system reset exception request. The diff erent reset types are mapped to this
vector (for details please refer to the Clock and Power Management Unit module (CPMU)):
1. Pin reset
2. Power-on reset
3. Low-voltage reset
4. Clock monitor reset request
5. COP watchdog reset request
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4.4.5 Exception Priority
The priority (from highest to lowest) and address of all exception vectors issued by the INT module upon
request by the CPU are shown in Table 4-8. Generally, all non-maskable interrupts have higher priorities
than maskable interrupts. Please note that between the four software interrupts (Unimplemented op-code
trap page1/page2 requests, SWI request, SYS request) there is no real priority defined since they cannot
occur simultaneously (the S12Z CPU executes one instruction at a time).
4.4.6 Interrupt Vector Table Layout
The interrupt vector table contains 128 entries, each 32 bits (4 bytes) wide. Each entry contains a 24-bit
address (3 bytes) which is stored in the 3 low-significant bytes of the entry. The content of the most
significant byte of a vector-table entry is ignored. Figure 4-13 illustrates the vecto r table entry format.
Figure 4-13. Interrupt Vector Table Entry
4.5 Initialization/Application Information
4.5.1 Initialization
After system reset, software should:
Initialize the interrupt vector base register if the interrupt vector table is not located at the default
location (0xFFFE00–0xFFFFFB).
Table 4-8. Exception Vector Map and Priority
Vector Address(1)
1. 24 bits vector address based
Source
0xFFFFFC Pin reset, power-on reset, low-voltage reset, clock monitor reset, COP watchdog reset
(Vector base + 0x0001F8) Unimplemented page1 op-code trap (SPARE) vector request
(Vector base + 0x0001F4) Unimplemented page2 op-code trap (TRAP) vector request
(Vector base + 0x0001F0) Software interrupt instruction (SWI) vector request
(Vector base + 0x0001EC) System call interrupt instruction (SYS) vector request
(Vector base + 0x0001E8) Machine exception vector request
(Vector base + 0x0001E4) Reserved
(Vector base + 0x0001E0) Reserved
(Vector base + 0x0001DC) Spurious interrupt
(Vector base + 0x0001D8) XIRQ interrupt request
(Vector base + 0x0001D4) IRQ interrupt request
(Vector base + 0x000010
..
Vector base + 0x0001D0)
Device specific I-bit maskable interrupt sources (priority determined by the associated
configuration registers, in descending order)
Bits [31:24 ] [23:0]
(unused) ISR Address
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Initialize the interrupt processing level configuration data registers (INT_CFADDR,
INT_CFDATA0–7) for all interrupt vector requests with the desired priority levels. It might be a
good idea to disable unused interrupt requests.
Enable I-bit maskable interrupts by clearing the I-bit in the CCW.
Enable the X-bit maskable interrupt by clearing the X-bit in the CCW (if required).
4.5.2 Interrupt Nesting
The interrupt request pr iority level scheme makes it possible to implement priority based interrupt request
nesting for the I-bit maskable interrupt requests.
I-bit maskable interrupt requests can be interrupted by an interrupt request with a higher priority,
so that there can be up to seven nested I-bit maskable interrupt requ ests at a time (refer to Figure 4-
14 for an example using up to three nested interrupt requests).
I-bit maskable interrupt requests cannot be interrupted by other I-bit maskable interrupt requests per
default. In order to make an interrupt service routine (ISR) interruptible, the ISR must explicitly clear the
I-bit in the CCW (CLI). Afte r cleari ng the I-bit, I-bit maska ble inter rupt requests with higher priority can
interrupt the current ISR.
An ISR of an interruptible I-bit maskable interrupt request could basically look like this:
Service interrupt, e.g., clear interrupt flags, copy data, etc.
Clear I-bit in the CCW by executing the CPU instruction CLI (thus allowing interrupt requests with
higher priority)
Process data
Return from interrupt by executing the instruction RTI
Figure 4-14. Interrupt Processing Example
0
Reset
4
0
7
6
5
4
3
2
1
0
L4
7
0
4
L1 (Pending)
L7
L3 (Pending)
RTI
4
0
3
0
RTI
RTI
1
0
0
RTI
Stacked IPL
Processing Levels
IPL in CCW
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4.5.3 Wake Up from Stop or Wait Mode
4.5.3.1 CPU Wake Up from Stop or Wait Mode
Every I-bit maskable interrupt request which is configured to be handled by the CPU is capable of waking
the MCU from stop or wait mode. Additionally machine exceptions can wake-up the MCU from stop or
wait mode.
T o determine whether an I-bit maskable interrupts is qualified to wake up the CPU or not, the same settings
as in normal run mode are applied during stop or wait mode:
If the I-bit in the CCW is set, all I-bit maskable interrupts are masked from waking up the MCU.
An I-bit maskable interrupt is ignored if it is configured to a priority level below or equal to the
current IPL in CCW.
The X-bit maskable interrupt request can wake up the MCU from stop or wait mode at anytime, even if
the X-bit in CCW is set1. If the X-bit maskable interrupt request is used to wake-up the MCU with the X-
bit in the CCW set, the associated ISR is not called. The CPU then resumes program execution with the
instruction following the WAI or STOP instruction. This feature works following the same rules like any
interrupt request, i.e. care must be taken that the X-bit maskable interrupt request used for wake-up
remains active at least until the system begins execution of the instruction following the WAI or STOP
instruction; otherwise, wake-up may not occur.
1. The capability of the XIRQ pin to wake-up the MCU with the X bit set may not be available if, for example, the XIRQ pin is
shared with other peripheral modules on the device. Please refer to the Port Integration Module (PIM) section of the MCU
reference manual for details.
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Chapter 5
Background Debug Controller (S12ZBDCV2)
5.1 Introduction
The background debug controller (BDC) is a single-wire, background debug system implemented in on-
chip hardware for minimal CPU intervention. The device BKGD pin interfaces directly to the BDC.
The S12ZBDC maintains the standard S12 serial interface protocol but introduces an enhanced handshake
protocol and enhanced BDC command set to support the linear instruction set family of S12Z devices and
offer easier, more flexible internal resource access over the BDC serial interface.
5.1.1 Glossary
Table 5-1. Revision History
Revision
Number
Revision
Date
Sections
Affected Description of Changes
V2.04 03.Dec.2012 Section 5.1.3.3 Included BACKGROUND/ Stop mode dependency
V2.05 22.Jan.2013 Section 5.3.2.2 Improved NORESP description and added STEP1/ Wait mode dependency
V2.06 22.Mar.2013 Section 5.3.2.2 Improved NORESP description of STEP1/ Wait mode dependency
V2.07 11.Apr.2013 Section 5.1.3.3.1 Improved STOP and BACKGROUND interdepency description
V2.08 31.May.2013 Section 5.4.4.4
Section 5.4.7.1
Removed misleading WAIT and BACKGROUND interdepency description
Added subsection dedicated to Long-ACK
V2.09 29.Aug.2013 Section 5.4.4.12 Noted that READ_DBGTB is only available for devices featuring a trace
buffer.
V2.10 21.Oct.2013 Section 5.1.3.3.2 Improved description of NORESP dependence on WAIT and BACKROUND
V2.11 02.Feb.2015 Section 5.1.3.3.1
Section 5.3.2
Corrected name of clock that can stay active in Stop mode
Table 5-2. Glossary Of Terms
Term Definition
DBG On chip Debug Module
BDM Active Background Debug Mode
CPU S12Z CPU
SSC Special Single Chip Mode (device operating mode
NSC Normal Single Chip Mode (device operating mode)
BDCSI Background Debug Controller Serial Interface. This refers to the single pin BKGD serial interface.
EWAIT Optional S12 feature which allows external devices to delay external accesses until deassertion of EWAIT
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5.1.2 Features
The BDC includes these distinctive features:
Single-wire communication with host development system
SYNC command to determine communication rate
Genuine non-intrusive handshake protocol
Enhanced handshake protocol for error detection and stop mode recognition
Active out of reset in special single chip mode
Most commands not requiring active BDM, for minimal CPU intervention
Full global memory map access without paging
Simple flash mass erase capability
5.1.3 Modes of Operation
S12 devices feature power modes (run, wait, and stop) and operating modes (normal single chip, special
single chip). Furthermore, the operation of the BDC is dependent on the device security status.
5.1.3.1 BDC Modes
The BDC features module specific modes, namely disabled, enabled and active. These modes are
dependent on the device security and operating mode. In active BDM the CPU ceases execution, to allow
BDC system access to all internal resources including CPU internal registers.
5.1.3.2 Security and Operating mode Dependency
In device run mode the BDC dependency is as follows
Normal modes, unsecure device
General BDC operation available. The BDC is disabled out of reset.
Normal modes, secure device
BDC disabled. No BDC access possible.
Special single chip mode, unsecure
BDM active out of reset. All BDC commands are available.
Special single chip mode, secure
BDM active out of reset. Restricted command set available.
When operating in secure mode, BDC operation is restricted to allow checking and clearing security by
mass erasing the on-chip flash memory. Secure operation prevents BDC access to on-chip memory other
than mass erase. The BDC command set is restricted to those commands classified as Always-available.
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5.1.3.3 Low-Power Modes
5.1.3.3.1 Stop Mode
The execution of the CPU STOP instruction leads to stop mode only when all bus masters (CPU, or others,
depending on the device) have finished processing. The operation during stop mode depends on the
ENBDC and BDCCIS bit settings as summarized in Table 5-3
A disabled BDC has no influence on stop mode operation. In this case the BDCSI clock is disabled in stop
mode thus it is not possible to enable the BDC from within stop mode.
STOP Mode With BDC Enabled And BDCCIS Clear
If the BDC is enabled and BDCCIS is clear , then the BDC prevents the BDCCLK clock (Figure 5-5) from
being disabled in stop mode. This allows BDC communication to continue throughout stop mode in order
to access the BDCCSR register. All other device level clock signals are disabled on entering stop mode.
NOTE
This is intended for application debugging, not for fast flash programming.
Thus the CLKSW bit must be clear to map the BDCSI to BDCCLK.
With the BDC enabled, an internal acknowledge delays stop mode entry and exit by 2 BDCSI clock + 2
bus clock cycles. If no other module delays stop mode entry and exit, then these additional clock cycles
represent a diff erence between the debug and not debug cases. Furthermore if a BDC internal access is
being executed when the device is entering stop mode, then the stop mode entry is delayed until the internal
access is complete (typically for 1 bus clock cycle).
Accesses to the internal memory map are not possible when the internal device cloc ks are disabled. Thus
attempted accesses to memory mapped resources are suppressed and the NORESP flag is set. Resources
can be accessed again by the next command received following exit from Stop mode.
A BACKGROUND command issued whilst in stop mode remains pending internally until the device
leaves stop mode. This means that subsequent active BDM commands, issued whilst BACKGROUND is
pending, set the ILLCMD flag because the device is not yet in active BDM.
If ACK handshaking is enabled, then the first ACK, following a stop mode entry is long to indicate a stop
exception. The BDC indicates a stop mode occurrence by setting the BDCCSR bit STOP. If the host
attempts further communication before the ACK pulse generation then the OVRUN bit is set.
Table 5-3. BDC STOP Operation Dependencies
ENBDC BDCCIS Description Of Operation
0 0 BDC has no effect on STOP mode.
0 1 BDC has no effect on STOP mode.
1 0 Only BDCCLK clock continues
1 1 All clocks continue
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STOP Mode With BDC Enabled And BDCCIS Set
If the BDC is enabled and BDCCIS is set, then the BDC prevents core clocks being disabled in stop mode.
This allows BDC communication, for access of internal memory mapped resources, but not CPU registers,
to continue throughout stop mode.
A BACKGROUND command issued whilst in stop mode remains pending internally until the device
leaves stop mode. This means that subsequent active BDM commands, issued whilst BACKGROUND is
pending, set the ILLCMD flag because the device is not yet in active BDM.
If ACK handshaking is enabled, then the first ACK, following a stop mode entry is long to indicate a stop
exception. The BDC indicates a stop mode occurrence by setting the BDCCSR bit STOP. If the host
attempts further communication before the ACK pulse generation then the OVRUN bit is set.
5.1.3.3.2 Wait Mode
The device enters wait mode when the CPU starts to execute the WAI instruction. The second part of the
WAI instruction (return from wait mode) can only be performed when an interrupt occurs. Thus on
entering wait mode the CPU is in the middle of the WAI instruction and cannot permit access to CPU
internal resources, nor allow entry to active BDM. Thus only commands classified as Non-Intrusive or
Always-Available are possible in wait mode.
On entering wait mode, the WAIT flag in BDCCSR is set. If the ACK handshake protocol is enabled then
the first ACK generated after WAIT has been set is a long-ACK pulse. Thus the host can recognize a wait
mode occurrence. The WAIT flag remains set and cannot be cleared whilst the device remains in wait
mode. After the device leaves wait mode the WAIT flag can be cleared by writing a “1” to it.
A BACKGROUND command issued whilst in wait mode sets the NORESP bit and the BDM active
request remains pending internally until the CPU leaves wait mode due to an interrupt. The device then
enters BDM with the PC po inting to the address of the first instruction of the ISR.
With ACK disabled, further Non-Intrusive or Always-Available commands are possible, in this pending
state, but attempted Active-Background commands set NORESP and ILLCMD because the BDC is not in
active BDM state.
W ith ACK enabled, if the host attempts further co mmunication before the ACK pulse generation then the
OVRUN bit is set.
Similarly the STEP1 command issued from a WAI instruction cannot be completed by the CPU until the
CPU leaves wait mode due to an interrupt. The first STEP1 into wait mode sets the BDCCSR WAIT bit.
If the part is still in Wait mode and a further STEP1 is carried out then the NORESP and ILLCMD bits are
set because the device is no longer in active BDM for the duration of WAI execution.
5.1.4 Block Diagram
A block diagram of the BDC is shown in Figure 5-1.
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Figure 5-1. BDC Block Diagram
5.2 External Signal Description
A single-wire interface pin (BKGD) is used to communicate with the BDC system. During res et, this pin
is a device mode select input. After reset, this pin becomes the dedicated serial interface pin for the BDC.
BKGD is a pseudo-open-drain pin with an on-chip pull-up. Unlike typical open-drain pins, the external
RC time constant on this pin due to external capacitance, plays almost no role in signal rise time. The
custom protocol provides for brief, actively driven speed-up pulses to force rapid rise times on this pin
without risking harmful drive level conflicts. Refer to Section 5.4.6 for more details.
5.3 Memory Map and Register Definition
5.3.1 Module Memory Map
Table 5-4 shows the BDC memory map.
Table 5-4. BDC Memory Map
Global Address Module Size
(Bytes)
Not Applicable BDC registers 2
BKGD
HOST
SYSTEM SERIAL INTERFACE CONTROL
INSTRUCTION
DECODE AND
BUS INTERFACE
AND
CONTROL LOGIC
ADDRESS
DATA
BUS CONTROL
BDCSI
CORE CLOCK
ERASE FLASH
FLASH ERASED
CPU CONTROL
AND SHIFT REGISTER
FLASH SECURE
BDCCSR REGISTER
AND DATAPATH
CONTROL
CLOCK DOMAIN
CONTROL
FSM
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5.3.2 Register Descriptions
The BDC registers are shown in Figure 5-2. Registers are accessed only by host-driven communications
to the BDC hardware using READ_BDCCSR and WRITE_BDCCSR commands. They are not accessible
in the device memory map.
5.3.2.1 BDC Control Status Register High (BDCCSRH)
Figure 5-3. BDC Control Status Register High (BDCCSRH)
Read: All modes through BDC operation only.
Write: All modes through BDC operation only, when not secured, but subject to the following:
Bits 7,3 and 2 can only be written by WRITE_BDCCSR commands.
Bit 5 can only be written by WRITE_BDCCSR commands when the device is not in stop mode.
Bits 6, 1 and 0 cannot be written. They can only be updated by internal hardware.
Global
Address
Register
Name Bit 7 6 5 4 3 2 1 Bit 0
Not
Applicable
BDCCSRH R ENBDC BDMACT BDCCIS 0STEAL CLKSW UNSEC ERASE
W
Not
Applicable
BDCCSRL R WAIT STOP RAMWF OVRUN NORESP RDINV ILLACC ILLCMD
W
= Unimplemented, Reserved 0 = Always read zero
Figure 5-2. BDC Register Summary
Register Address: This register is not in the device memory map. It is accessible using BDC inherent addressing commands
76543 2 1 0
RENBDC BDMACT BDCCIS 0STEAL CLKSW UNSEC ERASE
W
Reset
Secure AND SSC-Mode 11000 0 0 0
Unsecure AND SSC-Mode 11000 0 1 0
Secure AND NSC-Mode 00000 0 0 0
Unsecure AND NSC-Mode 00000 0 1 0
= Unimplemented, Reserved
0 = Always read zero
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Table 5-5. BDCCSRH Field Descriptions
Field Description
7
ENBDC
Enable BDC — This bit controls whether the BDC is enabled or disabled. When enabled, active BDM can be
entered and non-intrusive commands can be carried out. When disabled, active BDM is not possible and the
valid command set is restricted. Further information is provided in Tab le 5 -7 .
0 BDC disabled
1 BDC enabled
Note: ENBDC is set out of reset in special single chip mode.
6
BDMACT
BDM Active Status This bit becomes set upon entering active BDM. BDMACT is cleared as part of the active
BDM exit sequence.
0 BDM not active
1BDM active
Note: BDMACT is set out of reset in special single chip mode.
5
BDCCIS
BDC Continue In Stop — If ENBDC is set then BDCCIS selects the type of BDC operation in stop mode (as
shown in Tab le 5 -3 ). If ENBDC is clear, then the BDC has no effect on stop mode and no BDC communication
is possible.If ACK pulse handshaking is enabled, then the first ACK pulse following stop mode entry is a long
ACK. This bit cannot be written when the device is in stop mode.
0 Only the BDCCLK clock continues in stop mode
1 All clocks continue in stop mode
3
STEAL
Steal enabled with ACK— This bit forces immediate internal accesses with the ACK handshaking protocol
enabled. If ACK handshaking is disabled then BDC accesses steal the next bus cycle.
0 If ACK is enabled then BDC accesses await a free cycle, with a timeout of 512 cycles
1 If ACK is enabled then BDC accesses are carried out in the next bus cycle
2
CLKSW
Clock Switch The CLKSW bit controls the BDCSI clock source. This bit is initialized to “0” by each reset and
can be written to “1”. Once it has been set, it can only be cleared by a reset. When setting CLKSW a minimum
delay of 150 cycles at the initial clock speed must elapse before the next command can be sent. This guarantees
that the start of the next BDC command uses the new clock for timing subsequent BDC communications.
0 BDCCLK used as BDCSI clock source
1 Device fast clock used as BDCSI clock source
Note: Refer to the device specification to determine which clock connects to the BDCCLK and fast clock inputs.
1
UNSEC
Unsecure — If the device is unsecure, the UNSEC bit is set automatically.
0 Device is secure.
1 Device is unsecure.
Note: When UNSEC is set, the device is unsecure and the state of the secure bits in the on-chip Flash EEPROM
can be changed.
0
ERASE
Erase Flash — This bit can only be set by the dedicated ERASE_FLASH command. ERASE is unaffected by
write accesses to BDCCSR. ERASE is cleared either when the mass erase sequence is completed, independent
of the actual status of the flash array or by a soft reset.
Reading this bit indicates the status of the requested mass erase sequence.
0 No flash mass erase sequence pending completion
1 Flash mass erase sequence pending completion.
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5.3.2.2 BDC Control Status Register Low (BDCCSRL)
Figure 5-4. BDC Control Status Register Low (BDCCSRL)
Read: BDC access only.
Write: Bits [7:5], [3:0] BDC access only, restricted to flag clearing by writing a “1” to the bit position.
Write: Bit 4 never. It can only be cleared by a SYNC pulse.
If ACK handshaking is enabled then BDC commands with ACK causing a BDCCSRL[3:1] flag setting
condition also generate a long ACK pulse. Subsequent commands that are executed correctly generate a
normal ACK pulse. Subsequent commands that are not correctly executed generate a long ACK pulse. The
first ACK pulse after WAIT or STOP have been set also generates a long ACK. Subsequent ACK pulses
are normal, whilst STOP and WAIT remain set.
Long ACK pulses are not immediately generated if an overrun condition is caused by the host driving the
BKGD pin low whilst a target ACK is pending, because this would conflict with an attempted host
transmission following the BKGD edge. When a whole byte has been received following the offending
BKGD edge, the OVRUN bit is still set, forcing subsequent ACK pulses to be long.
Unimplemented BDC opcodes causing the ILLCMD bit to be set do not generate a long ACK because this
could conflict with further transmission from the host. If the ILLCMD is set for another reason, then a long
ACK is generated for the current command if it is a BDC command with ACK.
Register Address: This register is not in the device memory map. It is accessible using BDC inherent addressing commands
76543 2 1 0
RWAIT STOP RAMWF OVRUN NORESP RDINV ILLACC ILLCMD
W
Reset 00000 0 0 0
Table 5-6. BDCCSRL Field Descriptions
Field Description
7
WAIT
WAIT Indicator Flag — Indicates that the device entered wait mode. Writing a “1” to this bit whilst in wait mode
has no effect. Writing a “1” after exiting wait mode, clears the bit.
0 Device did not enter wait mode
1 Device entered wait mode.
6
STOP
STOP Indicator Flag — Indicates that the CPU requested stop mode following a STOP instruction. Writing a
“1” to this bit whilst not in stop mode clears the bit. Writing a “1” to this bit whilst in stop mode has no effect.
This bit can only be set when the BDC is enabled.
0 Device did not enter stop mode
1 Device entered stop mode.
5
RAMWF
RAM Write Fault — Indicates an ECC double fault during a BDC write access to RAM.
Writing a “1” to this bit, clears the bit.
0 No RAM write double fault detected.
1 RAM write double fault detected.
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4
OVRUN
Overrun Flag — Indicates unexpected host activity before command completion.
This occurs if a new command is received before the current command completion.
With ACK enabled this also occurs if the host drives the BKGD pin low whilst a target ACK pulse is pending
To protect internal resources from misinterpreted BDC accesses following an overrun, internal accesses are
suppressed until a SYNC clears this bit.
A SYNC clears the bit.
0 No overrun detected.
1 Overrun detected when issuing a BDC command.
3
NORESP
No Response Flag Indicates that the BDC internal action or data access did not complete. This occurs in the
following scenarios:
a) If no free cycle for an access is found within 512 core clock cycles. This could typically happen if a code loop
without free cycles is executing with ACK enabled and STEAL clear.
b) With ACK disabled or STEAL set, when an internal access is not complete before the host starts
data/BDCCSRL retrieval or an internal write access is not complete before the host starts the next BDC
command.
c) Attempted internal memory or SYNC_PC accesses during STOP mode set NORESP if BDCCIS is clear.
In the above cases, on setting NORESP, the BDC aborts the access if permitted. (For devices supporting
EWAIT, BDC external accesses with EWAIT assertions, prevent a command from being aborted until EWAIT
is deasserted).
d) If a BACKGROUND command is issued whilst the device is in wait mode the NORESP bit is set but the
command is not aborted. The active BDM request is completed when the device leaves wait mode.
Furthermore subsequent CPU register access commands during wait mode set the NORESP bit, should it
have been cleared.
e) If a command is issued whilst awaiting return from Wait mode. This can happen when using STEP1 to step
over a CPU WAI instruction, if the CPU has not returned from Wait mode before the next BDC command is
received.
f) If STEP1 is issued with the BDC enabled as the device enters Wait mode regardless of the BDMACT state.
When NORESP is set a value of 0xEE is returned for each data byte associated with the current access.
Writing a “1” to this bit, clears the bit.
0 Internal action or data access completed.
1 Internal action or data access did not complete.
2
RDINV
Read Data Invalid Flag — Indicates invalid read data due to an ECC error during a BDC initiated read access.
The access returns the actual data read from the location.
Writing a “1” to this bit, clears the bit.
0 No invalid read data detected.
1 Invalid data returned during a BDC read access.
1
ILLACC
Illegal Access Flag — Indicates an attempted illegal access. This is set in the following cases:
When the attempted access addresses unimplemented memory
When the access attempts to write to the flash array
When a CPU register access is attempted with an invalid CRN (Section 5.4.5.1).
Illegal accesses return a value of 0xEE for each data byte
Writing a “1” to this bit, clears the bit.
0 No illegal access detected.
1 Illegal BDC access detected.
Table 5-6. BDCCSRL Field Descriptions (continued)
Field Description
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5.4 Functional Description
5.4.1 Security
If the device resets with the system secured, the device clears the BDCCSR UNSEC bit. In the secure state
BDC access is restricted to the BDCCSR register. A mass erase can be requested using the
ERASE_FLASH command. If the mass erase is completed successfully, the device programs the security
bits to the unsecure state and sets the BDC UNSEC bit. If the mass erase is unsuccessful, the device
remains secure and the UNSEC bit is not set.
For more information regarding security, please refer to device specific security information.
5.4.2 Enabling BDC And Entering Active BDM
BDM can be activated only after being enabled. BDC is enabled by setting the ENBDC bit in the BDCCSR
register, via the single-wire interface, using the command WRITE_BDCCSR.
After being enabled, BDM is activated by one of the following1:
The BDC BACKGROUND command
A CPU BGND instruction
The DBG Breakpoint mechanism
Alternatively BDM can be activated directly from reset when resetting into Special Single Chip Mode.
The BDC is ready for receiving the first command 10 core clock cycles after the deassertion of the internal
reset signal. This is delayed relative to the external pin reset as specified in the device reset documentation.
On S12Z devices an NVM initialization phase follows reset. During this phase the BDC commands
classified as always available are carried out immediately, whereas other BDC commands are subject to
delayed response due to the NVM initialization phase.
NOTE
After resetting into SSC mode, the initial PC address must be supplied by
the host using the WRITE_Rn command before issuing the GO command.
0
ILLCMD
Illegal Command Flag — Indicates an illegal BDC command. This bit is set in the following cases:
When an unimplemented BDC command opcode is received.
When a DUMP_MEM{_WS}, FILL_MEM{_WS} or READ_SAME{_WS} is attempted in an illegal sequence.
When an active BDM command is received whilst BDM is not active
When a non Always-available command is received whilst the BDC is disabled or a flash mass erase is ongoing.
When a non Always-available command is received whilst the device is secure
Read commands return a value of 0xEE for each data byte
Writing a “1” to this bit, clears the bit.
0 No illegal command detected.
1 Illegal BDC command detected.
1. BDM active immediately out of special single-chip reset.
Table 5-6. BDCCSRL Field Descriptions (continued)
Field Description
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When BDM is activated, the CPU finishes executing the current instruction. Thereafter only BDC
commands can affect CPU register contents until the BDC GO command returns from active BDM to user
code or a device reset occurs. When BDM is activated by a breakpoint, the type of breakpoint used
determines if BDM becomes active before or after execution of the next instruction.
NOTE
Attempting to activate BDM using a BGND instruction whilst the BDC is
disabled, the CPU requires clock cycles for the attempted BGND execution.
However BACKGROUND commands issued whilst the BDC is disabled
are ignored by the BDC and the CPU execution is not delayed.
5.4.3 Clock Source
The BDC clock source can be mapped to a constant frequency clock source or a PLL based fast clock. The
clock source for the BDC is selected by the CLKSW bit as shown in Figure 5-5. The BDC internal clock
is named BDCSI clock. If BDCSI clock is mapped to the BDCCLK by CLKSW then the serial interface
communication is not af fected by bus/core clock frequency changes. If the BDC is mapped to BDCFCLK
then the clock is connected to a PLL derived source at device level (typically bus clock), thus can be
subject to frequency changes in application. Debugging through frequency changes requires SYNC pulses
to re-synchronize. The sources of BDCCLK and BDCFCLK are specified at device level.
BDC accesses of internal device resources always use the device co re clock. Thus if the ACK handshake
protocol is not enabled, the clock frequency relationship must be taken into account by the host.
When changing the clock source via the CLKSW bit a minimum delay of 150 cycles at the initial clock
speed must elapse before a SYNC can be sent. This guarantees that the start of the next BDC command
uses the new clock for timing subsequent BDC communications.
Figure 5-5. Clock Switch
5.4.4 BDC Commands
BDC commands can be classified into three types as shown in Table 5-7.
BDCSI Clock
Core clock
1
0
CLKSW
BDCCLK BDC serial interface
and FSM
BDC device resource
interface
BDCFCLK
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Non-intrusive commands are used to read and write target system memory locations and to enter active
BDM. Target system memory includes all memory and registers within the global memory map, including
external memory.
Active background commands are used to read and write all memory locations and CPU resources.
Furthermore they allow single stepping through application code and to exit from active BDM.
Non-intrusive commands can only be executed when the BDC is en abled and the device unsecure. Active
background commands can only be executed when the system is not secure and is in active BDM.
Non-intrusive commands do not require the system to be in active BDM for execution, although, they can
still be executed in this mode. When executing a non-intrusive command with the ACK pulse handshake
protocol disabled, the BDC steals the next bus cycle for the access. If an operation requires multiple cycles,
then multiple cycles can be stolen. Thus if stolen cycles are not free cycles, the application code execution
is delayed. The delay is negligible because the BDC serial transfer rate dictates that such accesses occur
infrequently.
For data read commands, the external host must wait at least 16 BDCSI clock cycles after sending the
address before attempting to obtain the read data. This is to be certain that valid data is available in the
BDC shift register, ready to be shifted out. For write commands, the external host must wait 16 bdcsi
cycles after sending the data to be written before attempting to send a new command. This is to avoid
disturbing the BDC shift register before the write has been completed. The external host must wa it at least
for 16 bdcsi cycles after a control command before starting any new serial command.
Table 5-7. BDC Command Types
Command Type Secure
Status
BDC
Status CPU Status Command Set
Always-available Secure or
Unsecure
Enabled or
Disabled
Read/write access to BDCCSR
Mass erase flash memory using ERASE_FLASH
•SYNC
ACK enable/disable
Non-intrusive Unsecure Enabled
Code
execution
allowed
Read/write access to BDCCSR
Memory access
Memory access with status
Mass erase flash memory using ERASE_FLASH
Debug register access
BACKGROUND
•SYNC
ACK enable/disable
Active background Unsecure Active
Code
execution
halted
Read/write access to BDCCSR
Memory access
Memory access with status
Mass erase flash memory using ERASE_FLASH
Debug register access
Read or write CPU registers
Single-step the application
Exit active BDM to return to the application program (GO)
•SYNC
ACK enable/disable
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If the ACK pulse handshake protocol is enabled and STEAL is cleared, then the BDC waits for the first
free bus cycle to make a non-intrusive access. If no free bus cycle occurs within 512 core clock cycles then
the BDC aborts the access, sets the NORESP bit and uses a long ACK pulse to indicate an error condition
to the host.
Table 5-8 summarizes the BDC command set. The subsequent sections describe each command in detail
and illustrate the command structure in a series of packets, each c onsisting of eight bit times starting with
a falling edge. The bar across the top of the blocks indicates that the BKGD line idles in the high state. The
time for an 8-bit command is 8 16 target BDCSI clock cycles.
The nomenclature below is used to describe the structure of the BDC commands. Commands begin with
an 8-bit hexadecimal command code in the host-to-target direction (most significant bit first)
/ = separates parts of the command
d = delay 16 target BDCSI clock cycles (DLY)
dack = delay (16 cycles) no ACK; or delay (=> 32 cycles) then ACK.(DACK)
ad24 = 24-bit memory address in the host-to-target direction
rd8 = 8 bits of read data in the target-to-host direction
rd16 = 16 bits of read data in the target-to-host direction
rd24 = 24 bits of read data in the target-to-host direction
rd32 = 32 bits of read data in the target-to-host direction
rd64 = 64 bits of read data in the target-to-host direction
rd.sz = read data, size defined by sz, in the target-to-host direction
wd8 = 8 bits of write data in the host-to-target direction
wd16 = 16 bits of write data in the host-to-target direction
wd32 = 32 bits of write data in the host-to-target direction
wd.sz = write data, size defined by sz, in the host-to-target direction
ss = the contents of BDCCSRL in the target-to-host direction
sz = memory operand size (00 = byte, 01 = word, 10 = long)
(sz = 11 is reserved and currently defaults to long)
crn = core register number, 32-bit data width
WS = command suffix signaling the operation is with status
Table 5-8. BDC Command Summary
Command
Mnemonic
Command
Classification ACK Command
Structure Description
SYNC Always
Available
N/A N/A(1) Request a timed reference pulse to
determine the target BDC communication
speed
ACK_DISABLE Always
Available
No 0x03/d Disable the communication handshake.
This command does not issue an ACK
pulse.
ACK_ENABLE Always
Available
Yes 0x02/dack Enable the communication handshake.
Issues an ACK pulse after the command is
executed.
BACKGROUND Non-Intrusive Yes 0x04/dack Halt the CPU if ENBDC is set. Otherwise,
ignore as illegal command.
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DUMP_MEM.sz Non-Intrusive Yes (0x32+4 x sz)/dack/rd.sz Dump (read) memory based on operand
size (sz). Used with READ_MEM to dump
large blocks of memory. An initial
READ_MEM is executed to set up the
starting address of the block and to retrieve
the first result. Subsequent DUMP_MEM
commands retrieve sequential operands.
DUMP_MEM.sz_WS Non-Intrusive No (0x33+4 x sz)/d/ss/rd.sz Dump (read) memory based on operand
size (sz) and report status. Used with
READ_MEM{_WS} to dump large blocks of
memory. An initial READ_MEM{_WS} is
executed to set up the starting address of
the block and to retrieve the first result.
Subsequent DUMP_MEM{_WS}
commands retrieve sequential operands.
FILL_MEM.sz Non-Intrusive Yes (0x12+4 x sz)/wd.sz/dack Fill (write) memory based on operand size
(sz). Used with WRITE_MEM to fill large
blocks of memory. An initial WRITE_MEM
is executed to set up the starting address of
the block and to write the first operand.
Subsequent FILL_MEM commands write
sequential operands.
FILL_MEM.sz_WS Non-Intrusive No (0x13+4 x sz)/wd.sz/d/ss Fill (write) memory based on operand size
(sz) and report status. Used with
WRITE_MEM{_WS} to fill large blocks of
memory. An initial WRITE_MEM{_WS} is
executed to set up the starting address of
the block and to write the first operand.
Subsequent FILL_MEM{_WS} commands
write sequential operands.
GO Active
Background
Yes 0x08/dack Resume CPU user code execution
GO_UNTIL(2) Active
Background
Yes 0x0C/dack Go to user program. ACK is driven upon
returning to active background mode.
NOP Non-Intrusive Yes 0x00/dack No operation
READ_Rn Active
Background
Yes (0x60+CRN)/dack/rd32 Read the requested CPU register
READ_MEM.sz Non-Intrusive Yes (0x30+4 x sz)/ad24/dack/rd.sz Read the appropriately-sized (sz) memory
value from the location specified by the 24-
bit address
READ_MEM.sz_WS Non-Intrusive No (0x31+4 x sz)/ad24/d/ss/rd.sz Read the appropriately-sized (sz) memory
value from the location specified by the 24-
bit address and report status
READ_DBGTB Non-Intrusive Yes (0x07)/dack/rd32/dack/rd32 Read 64-bits of DBG trace buffer
Table 5-8. BDC Command Summary (continued)
Command
Mnemonic
Command
Classification ACK Command
Structure Description
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5.4.4.1 SYNC
The SYNC command is unlike other BDC commands because the host does not necessarily know the
correct speed to use for serial communications until after it has analyzed the response to the SYNC
command.
To issue a SYNC command, the host:
1. Ensures that the BKGD pin is high for at least 4 cycles of the slowest possible BDCSI clock
without reset asserted.
2. Drives the BKGD pin low for at least 128 cycles of the slowest possible BDCSI clock.
3. Drives BKGD high for a brief speed-up pulse to get a fast rise time. (This speedup pulse is typically
one cycle of the host clock which is as fast as the maximum target BDCSI clock).
4. Removes all drive to the BKGD pin so it reverts to high impedance.
5. Listens to the BKGD pin for the sync response pulse.
READ_SAME.sz Non-Intrusive Yes (0x50+4 x sz)/dack/rd.sz Read from location. An initial READ_MEM
defines the address, subsequent
READ_SAME reads return content of
same address
READ_SAME.sz_WS Non-Intrusive No (0x51+4 x sz)/d/ss/rd.sz Read from location. An initial READ_MEM
defines the address, subsequent
READ_SAME reads return content of
same address
READ_BDCCSR Always
Available
No 0x2D/rd16 Read the BDCCSR register
SYNC_PC Non-Intrusive Yes 0x01/dack/rd24 Read current PC
WRITE_MEM.sz Non-Intrusive Yes (0x10+4 x
sz)/ad24/wd.sz/dack
Write the appropriately-sized (sz) memory
value to the location specified by the 24-bit
address
WRITE_MEM.sz_WS Non-Intrusive No (0x11+4 x sz)/ad24/wd.sz/d/ss Write the appropriately-sized (sz) memory
value to the location specified by the 24-bit
address and report status
WRITE_Rn Active
Background
Yes (0x40+CRN)/wd32/dack Write the requested CPU register
WRITE_BDCCSR Always
Available
No 0x0D/wd16 Write the BDCCSR register
ERASE_FLASH Always
Available
No 0x95/d Mass erase internal flash
STEP1 (TRACE1) Active
Background
Yes 0x09/dack Execute one CPU command.
1. The SYNC command is a special operation which does not have a command code.
2. The GO_UNTIL command is identical to the GO command if ACK is not enabled.
Table 5-8. BDC Command Summary (continued)
Command
Mnemonic
Command
Classification ACK Command
Structure Description
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Upon detecting the sync request from the host (which is a much longer low time than would ever occur
during normal BDC communications), the target:
1. Discards any incomplete command
2. Waits for BKGD to return to a logic high.
3. Delays 16 cycles to allow the host to stop driving the high speed-up pulse.
4. Drives BKGD low for 128 BDCSI clock cycles.
5. Drives a 1-cycle high speed-up pulse to force a fast rise time on BKGD.
6. Removes all drive to the BKGD pin so it reverts to high impedance.
7. Clears the OVRRUN flag (if set).
The host measures the low time of this 128-cycle SYNC response pulse and determines the correct speed
for subsequent BDC communications. Typically , the host can determine the correct commun ication speed
within a few percent of the actual target speed and the serial protocol can easily tolerate this speed error.
If the SYNC request is detected by the target, any partially executed command is discarded. This is referred
to as a soft-reset, equivalent to a timeout in the serial communication. After the SYNC response, the target
interprets the next negative edge (issued by the host) as the start of a new BDC command or the start of
new SYNC request.
A SYNC command can also be used to abort a pending ACK pulse. This is explained in Section 5.4.8.
5.4.4.2 ACK_DISABLE
Disables the serial communication handshake protocol. The subsequent commands, issued after the
ACK_DISABLE command, do not execute the hardware handshake protocol. This command is not
followed by an ACK pulse.
5.4.4.3 ACK_ENABLE
Enables the hardware handshake protocol in the serial communication. The hardware handshake is
implemented by an acknowledge (ACK) pulse issued by the tar get MCU in response to a host command.
The ACK_ENABLE command is interpreted and executed in the BDC logic without the need to interface
Disable host/target handshake protocol Always Available
0x03
host
target
D
L
Y
Enable host/target handshake protocol Always Available
0x02
host
target
D
A
C
K
Chapter 5 Background Debug Controller (S12ZBDCV2)
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with the CPU. An ACK pulse is issued by the target device after this command is executed. This command
can be used by the host to evaluate if the target supports the hardware handshake protocol. If the target
supports the hardware handshake protocol, subsequent commands are enabled to execute the hardware
handshake protocol, otherwise this command is ignored by the target. Table 5-8 indicates which
commands support the ACK hardware handshake protocol.
For additional information about the hardware handshake protocol, refer to Section 5.4.7,” and
Section 5.4.8.”
5.4.4.4 BACKGROUND
Provided ENBDC is set, the BACKGROUND command causes the target MCU to enter active BDM as
soon as the current CPU instruction finishes. If ENBDC is cleared, the BACKGROUND command is
ignored.
A delay of 16 BDCSI clock cycles is required after the BACKGROUND command to allow the target
MCU to finish its current CPU instruction and enter active background mode before a new BDC command
can be accepted.
The host debugger must set ENBDC before attempting to send the BACKGROUND command the first
time. Normally the host sets ENBDC once at the beginning of a debug session or after a target system reset.
During debugging, the host uses GO commands to move from active BDM to application program
execution and uses the BACKGROUND command or DBG breakpoints to return to active BDM.
A BACKGROUND command issued during stop or wait modes cannot immediately force active BDM
because the WAI instruction does not end until an interrupt occurs. For the detailed mode dependency
description refer to Section 5.1.3.3.
The host can recognize this pending BDM request condition because both NORESP and WAIT are set, but
BDMACT is clear. Whilst in wait mode, with the pending BDM request, non-intrusive BDC commands
are allowed.
5.4.4.5 DUMP_MEM.sz, DUMP_MEM.sz_WS
Enter active background mode (if enabled) Non-intrusive
0x04
host
target
D
A
C
K
DUMP_MEM.sz
Read memory specified by debug address register, then
increment address
Non-intrusive
0x32 Data[7-0]
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DUMP_MEM{_WS} is used with the READ_MEM{_WS} command to access lar g e blocks of memory.
An initial READ_MEM{_WS} is executed to set-up the starting address of the block and to retrieve the
first result. The DUMP_MEM{_WS} command retrieves subsequent operands. The initial address is
incremented by the operand size (1, 2, or 4) and saved in a temporary register. Subsequent
DUMP_MEM{_WS} commands use this address, perform the memory read, increment it by the current
operand size, and store the updated address in the temporary register . If the with-status option is specified,
the BDCCSRL status byte is returned before the read data. This status byte reflects the state after the
memory read was performed. If enabled, an ACK pulse is driven before the data bytes are transmitted. The
effect of the access size and alignment on the next address to be accessed is explained in more detail in
Section 5.4.5.2”.
host
target
D
A
C
K
target
host
0x36 Data[15-8] Data[7-0]
host
target
D
A
C
K
target
host
target
host
0x3A Data[31-24] Data[23-16] Data[15-8] Data[7-0]
host
target
D
A
C
K
target
host
target
host
target
host
target
host
DUMP_MEM.sz_WS
Read memory specified by debug address register with status,
then increment address
Non-intrusive
0x33 BDCCSRL Data[7-0]
host
target
D
L
Y
target
host
target
host
0x37 BDCCSRL Data[15-8] Data[7-0]
host
target
D
L
Y
target
host
target
host
target
host
0x3B BDCCSRL Data[31-24] Data23-16] Data[15-8] Data[7-0]
host
target
D
L
Y
target
host
target
host
target
host
target
host
target
host
DUMP_MEM.sz
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NOTE
DUMP_MEM{_WS} is a valid command only when preceded by SYNC,
NOP, READ_MEM{_WS}, or another DUMP_MEM{_WS} command.
Otherwise, an illegal command response is returned, setting the ILLCMD
bit. NOP can be used for inter-command padding without corrupting the
address pointer.
The size field (sz) is examined each time a DUMP_MEM{_WS} command is processed, allowing the
operand size to be dynamically altered. The examples show the DUMP_MEM.B{_WS},
DUMP_MEM.W{_WS} and DUMP_MEM.L{_WS} commands.
5.4.4.6 FILL_MEM.sz, FILL_MEM.sz_WS
FILL_MEM.sz
Write memory specified by debug address register, then
increment address
Non-intrusive
0x12 Data[7-0]
host
target
host
target
D
A
C
K
0x16 Data[15-8] Data[7-0]
host
target
host
target
host
target
D
A
C
K
0x1A Data[31-24] Data[23-16] Data[15-8] Data[7-0]
host
target
host
target
host
target
host
target
host
target
D
A
C
K
FILL_MEM.sz_WS
Write memory specified by debug address register with
status, then increment address
Non-intrusive
0x13 Data[7-0] BDCCSRL
host
target
host
target
D
L
Y
target
host
0x17 Data[15-8] Data[7-0] BDCCSRL
host
target
host
target
host
target
D
L
Y
target
host
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FILL_MEM{_WS} is used with the WRITE_MEM{_WS} command to access large blocks of memory.
An initial WRITE_MEM{_WS} is executed to set up the starting address of the block and write the first
datum. If an initial WRITE_MEM{_WS} is not executed before the first FILL_MEM{_WS}, an illegal
command response is returned. The FILL_MEM{_WS} command stores subsequent operands. The initial
address is incremented by the operand size (1, 2, or 4) and saved in a temporary register. Subsequent
FILL_MEM{_WS} commands use this address, perform the memory write, increment it by the current
operand size, and store the updated address in the temporary register . If the with-status option is specified,
the BDCCSRL status byte is returned after the write data. This status byte reflects the state after the
memory write was performed. If enabled an ACK pulse is generated after the internal write access has been
completed or aborted. The effect of the access size and alignment on the next address to be accessed is
explained in more detail in Section 5.4.5.2
NOTE
FILL_MEM{_WS} is a valid command only when preceded by SYNC,
NOP, WRITE_MEM{_WS}, or another FILL_MEM{_WS} command.
Otherwise, an illegal command response is returned, setting the ILLCMD
bit. NOP can be used for inter command padding without corrupting the
address pointer.
The size field (sz) is examined each time a FILL_MEM{_WS} command is processed, allowing the
operand size to be dynamically altered. The examples show the FILL_MEM.B{_WS},
FILL_MEM.W{_WS} and FILL_MEM.L{_WS} commands.
5.4.4.7 GO
This command is used to exit active BDM and begin (or resume) execution of CPU application code. The
CPU pipeline is flushed and refilled before normal instruction execution resumes. Prefetching begins at
the current address in the PC. If any register (such as the PC) is altered by a BDC command whilst in BDM,
the updated value is used when prefetching resumes. If enabled, an ACK is driven on exiting active BDM.
If a GO command is issued whilst the BDM is inactive, an illegal command response is returned and the
ILLCMD bit is set.
0x1B Data[31-24] Data[23-16] Data[15-8] Data[7-0] BDCCSRL
host
target
host
target
host
target
host
target
host
target
D
L
Y
target
host
Go Non-intrusive
0x08
host
target
D
A
C
K
FILL_MEM.sz_WS
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5.4.4.8 GO_UNTIL
This command is used to exit active BDM and begin (or resume) execution of application code. The CPU
pipeline is flushed and refilled before normal instruction execution resumes. Prefetching begins at the
current address in the PC. If any register (such as the PC) is altered by a BDC command whilst in BDM,
the updated value is used when prefetching resumes.
After resuming application code execution, if ACK is enabled, the BDC awaits a return to active BDM
before driving an ACK pulse. timeouts do not apply when awaiting a GO_UNTIL command ACK.
If a GO_UNTIL is not acknowledged then a SYNC command must be issued to end the pending
GO_UNTIL.
If a GO_UNTIL command is issued whilst BDM is inactive, an illegal command response is returned a nd
the ILLCMD bit is set.
If ACK handshaking is disabled, the GO_UNTIL command is identical to the GO command.
5.4.4.9 NOP
NOP performs no operation and may be used as a null command where required.
5.4.4.10 READ_Rn
This command reads the selected CPU registers and returns the 32-bit result. Accesses to CPU registers
are always 32-bits wide, regardless of implemented register width. Bytes that are not implemented return
Go Until Active Background
0x0C
host
target
D
A
C
K
No operation Active Background
0x00
host
target
D
A
C
K
Read CPU register Active Background
0x60+CRN Data [31-24] Data [23-16] Data [15-8] Data [7-0]
host
target
D
A
C
K
target
host
target
host
target
host
target
host
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198 Freescale Semiconductor
zero. The register is addressed through the CPU register number (CRN). See Section 5.4.5.1 for the CRN
address decoding. If enabled, an ACK pulse is driven before the data bytes are transmitted.
If the device is not in active BDM, this command is illegal, the ILLCMD bit is set and no access is
performed.
5.4.4.11 READ_MEM.sz, READ_MEM.sz_WS
Read data at the specified memory address. The address is transmitted as three 8-bit packets ( msb to lsb)
immediately after the command.
The hardware forces low-order address bits to zero longword accesses to ensure these accesses are on 0-
modulo-size alignments. Byte alignment details are described in Section 5.4.5.2”. If the with-status option
is specified, the BDCCSR status byte is returned before the read data. This status byte reflects the state
READ_MEM.sz
Read memory at the specified address Non-intrusive
0x30 Address[23-0] Data[7-0]
host
target
host
target
D
A
C
K
target
host
0x34 Address[23-0] Data[15-8] Data[7-0]
host
target
host 
target
D
A
C
K
target
host
target
host
0x38 Address[23-0] Data[31-24] Data[23-16] Data[15-8] Data[7-0]
host
target
host 
target
D
A
C
K
target
host
target
host
target
host
target
host
READ_MEM.sz_WS
Read memory at the specified address with status Non-intrusive
0x31 Address[23-0] BDCCSRL Data[7-0]
host
target
host
target
D
L
Y
target
host
target
host
0x35 Address[23-0] BDCCSRL Data [15-8] Data [7-0]
host
target
host
target
D
L
Y
target
host
target
host
target
host
0x39 Address[23-0] BDCCSRL Data[31-24] Data[23-16] Data [15-8] Data [7-0]
host
target
host
target
D
L
Y
target
host
target
host
target
host
target
host
target
host
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after the memory read was performed. If enabled, an ACK pulse is driven before the data bytes are
transmitted.
The examples show the READ_MEM.B{_WS}, READ_MEM.W{_WS} and READ_MEM.L{_WS}
commands.
5.4.4.12 READ_DBGTB
This command is only available on devices, where the DBG module includes a trace buffer . Attempted use
of this command on devices without a traace buffer return 0x00.
Read 64 bits from the DBG trace buffer. Refer to the DBG module description for more detailed
information. If enabled an ACK pulse is generated before each 32-bit longword is ready to be read by the
host. After issuing the first ACK a timeout is still possible whilst accessing the second 32-bit longword,
since this requires separate internal accesses. The first 32-bit longword corresponds to trace buffer line
bits[31:0]; the second to trace buffer line b its[63:32]. If ACK handshaking is disabled, the host must wait
16 clock cycles (DLY) after completing the first 32-bit read before starting the second 32-bit read.
5.4.4.13 READ_SAME.sz, READ_SAME.sz_WS
Read DBG trace buffer Non-intrusive
0x07 TB Line [31-
24]
TB Line [23-
16]
TB Line [15-
8]
TB Line [7-
0]
TB Line [63-
56]
TB Line [55-
48]
TB Line [47-
40]
TB Line [39-
32]
host
target
D
A
C
K
target
host
target
host
target
host
target
host
D
A
C
K
target
host
target
host
target
host
target
host
READ_SAME
Read same location specified by previous READ_MEM{_WS} Non-intrusive
0x54 Data[15-8] Data[7-0]
host
target
D
A
C
K
target
host
target
host
READ_SAME_WS
Read same location specified by previous READ_MEM{_WS} Non-intrusive
0x55 BDCCSRL Data [15-8] Data [7-0]
host
target
D
L
Y
target
host
target
host
target
host
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Read from location defined by the previous READ_MEM. The previous READ_MEM command defines
the address, subsequent READ_SAME commands return contents of same address. The example shows
the sequence for reading a 16-bit word size. Byte alignment details are described in Section 5.4.5.2”. If
enabled, an ACK pulse is driven before the data bytes are transmitted.
NOTE
READ_SAME{_WS} is a valid command only when preceded by SYNC,
NOP, READ_MEM{_WS}, or another READ_SAME{_WS} command.
Otherwise, an illegal command response is returned, setting the ILLCMD
bit. NOP can be used for inter-command padding without corrupting the
address pointer.
5.4.4.14 READ_BDCCSR
Read the BDCCSR status register. This command can be executed in any mode.
5.4.4.15 SYNC_PC
This command returns the 24-bit CPU PC value to the host. Unsuccessful SYNC_PC accesses return 0xEE
for each byte. If enabled, an ACK pulse is driven before the data bytes are transmitted. The value of 0x EE
is returned if a timeout occurs, whereby NORESP is set. This can occur if the CPU is executing the WAI
instruction, or the STOP instruction with BDCCIS clear, or if a CPU access is delayed by EWAIT. If the
CPU is executing the ST OP instruction and BDCCIS is set, then SYNC_PC returns the PC addre ss of the
instruction following STOP in the code listing.
This command can be used to dynamically access the PC for performance monitoring as the execution of
this command is considerably less intrusive to the real-time operation of an application than a
BACKGROUND/read-PC/GO command sequence. Whilst the BDC is not in active BDM, SYNC_PC
returns the PC address of the instruction currently being executed by the CPU. In active BDM, SYNC_PC
returns the address of the next instruction to be executed on returning from active BDM. Thus following
a write to the PC in active BDM, a SYNC_PC returns that written value.
Read BDCCSR Status Register Always Available
0x2D BDCCSR
[15:8]
BDCCSR
[7-0]
host
target
D
L
Y
target
host
target
host
Sample current PC Non-intrusive
0x01 PC
data[23–16]
PC
data[15–8]
PC
data[7–0]
host
target
D
A
C
K
target
host
target
host
target
host
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5.4.4.16 WRITE_MEM.sz, WRITE_MEM.sz_WS
Write data to the specified me mory address. The address is transmitted a s three 8-bit packets (msb to lsb)
immediately after the command.
If the with-status option is specified, the status byte contained in BDCCSRL is returned after the write data.
This status byte reflects the state after the memory write was performed. The examples show the
WRITE_MEM.B{_WS}, WRITE_MEM.W{_WS}, and WRITE_MEM.L{_WS} commands. If enabled
an ACK pulse is generated after the internal write access has been completed or aborted.
The hardware forces low-order address bits to zero longword accesses to ensure these accesses are on 0-
modulo-size alignments. Byte alignment details are described in Section 5.4.5.2”.
WRITE_MEM.sz
Write memory at the specified address Non-intrusive
0x10 Address[23-0] Data[7–0]
host
target host target host
target
D
A
C
K
0x14 Address[23-0] Data[15–8] Data[7–0]
host
target host target host
target
host
target
D
A
C
K
0x18 Address[23-0] Data[31–24] Data[23–16] Data[15–8] Data[7–0]
host
target host target host
target
host
target
host
target
host
target
D
A
C
K
WRITE_MEM.sz_WS
Write memory at the specified address with status Non-intrusive
0x11 Address[23-0] Data[7–0] BDCCSRL
host
target
host
target
host
target
D
L
Y
target
host
0x15 Address[23-0] Data[15–8] Data[7–0] BDCCSRL
host
target
host
target
host
target
host
target
D
L
Y
target
host
0x19 Address[23-0] Data[31–24] Data[23–16] Data[15–8] Data[7–0] BDCCSRL
host
target
host
target
host
target
host
target
host
target
host
target
D
L
Y
target
host
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202 Freescale Semiconductor
5.4.4.17 WRITE_Rn
If the device is in active BDM, this command writes the 32-bit operand to the selected CPU general-
purpose register. See Section 5.4.5.1 for the CRN details. Accesses to CPU registers are always 32-bits
wide, regardless of implemented register width. If enabled an ACK pulse is generated after the internal
write access has been completed or aborted.
If the device is not in active BDM, this command is rejected as an illegal operation, the ILLCMD bit is set
and no operation is performed.
5.4.4.18 WRITE_BDCCSR
16-bit write to the BDCCSR register. No ACK pulse is generated. Writing to this register can be used to
configure control bits or clear flag bits. Refer to the register bit descriptions.
5.4.4.19 ERASE_FLASH
Mass erase the internal flash. This command can always be issued. On receiving this command twice in
succession, the BDC sets the ERASE bit in BDCCSR and requests a flash mass erase. Any other BDC
command following a single ERASE_FLASH initializes the sequence, such that thereafter the
ERASE_FLASH must be applied twice in succession to request a mass erase. If 512 BDCSI clock cycles
elapse between the consecutive ERASE_FLASH commands then a timeout occurs, which forces a soft
reset and initializes the sequence. The ERASE bit is cleared when the mass erase sequence has been
completed. No ACK is driven.
Write general-purpose CPU register Active Background
0x40+CRN Data [31–24] Data [23–16] Data [15–8] Data [7–0]
host
target
host
target
host
target
host
target
host
target
D
A
C
K
Write BDCCSR Always Available
0x0D BDCCSR
Data [15-8]
BDCCSR
Data [7-0]
host
target
D
L
Y
host
target
host
target
Erase FLASH Always Available
0x95
host
target
D
L
Y
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During the mass erase operation, which takes many clock cycles, the command status is indicated by the
ERASE bit in BDCCSR. Whilst a mass erase operation is ongoing, Always-available commands can be
issued. This allows the status of the erase operation to be polled by reading BDCCSR to determine when
the operation is finished.
The status of the flash array can be verified by subsequently reading the flash error flags to determine if
the erase completed successfully.
ERASE_FLASH can be aborted by a SYNC pulse forcing a soft reset.
NOTE: Device Bus Frequency Considerations
The ERASE_FLASH command requires the default device bus clock
frequency after reset. Thus the bus clock frequency must not be changed
following reset before issuing an ERASE_FLASH command.
5.4.4.20 STEP1
This command is used to step through application code. In active BDM this command executes the next
CPU instruction in application code. If enabled an ACK is driven.
If a STEP1 command is issued and the CPU is not halted, the command is ignored.
Using STEP1 to step through a CPU WAI instruction is explained in Section 5.1.3.3.2.
5.4.5 BDC Access Of Internal Resources
Unsuccessful read accesses of internal resources return a value of 0xEE for each data byte. This enables a
debugger to recognize a potential error, even if neither the ACK handshaking protocol nor a status
command is currently being executed. The value of 0xEE is returned in the following cases.
Illegal address access, whereby ILLACC is set
Invalid READ_SAME or DUMP_MEM sequence
Invalid READ_Rn command (BDM inactive or CRN incorrect)
Internal resource read with timeout, whereby NORESP is set
5.4.5.1 BDC Access Of CPU Registers
The CRN field of the READ_Rn and WRITE_Rn commands contains a pointer to the CPU registers . The
mapping of CRN to CPU registers is shown in Table 5-9. Accesses to CPU registers are always 32-bits
wide, regardless of implemented register width. This means that the BDC data transmission for these
Step1 Active Background
0x09
host
target
D
A
C
K
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commands is 32-bits long. The valid bits of the transf er are listed in the Valid Data Bits column. The other
bits of the transmission are redundant.
Attempted accesses of CPU registers using a CRN of 0xD,0xE or 0xF is invalid, returning the value 0xEE
for each byte and setting the ILLACC bit.
5.4.5.2 BDC Access Of Device Memory Mapped Resources
The device memory map is accessed using READ_MEM, DUMP_MEM, WRITE_MEM, FILL_MEM
and READ_SAME, which support different access sizes, as explained in the command descriptions.
When an unimplemented command occurs during a DUMP_MEM, FILL_MEM or READ_SAME
sequence, then that sequence is ended.
Illegal read accesses return a value of 0xEE for each byte. After an illegal access FILL_MEM and
READ_SAME commands are not valid, and it is necessary to restart the internal access sequence with
READ_MEM or WRITE_MEM. An illegal access does not break a DUMP_MEM sequence. After read
accesses that cause the RDINV bit to be set, DUMP_MEM and READ_SAME commands are valid, it is
not necessary to restart the access sequence with a READ_MEM.
The hardware forces low-order address bits to zero for longword accesses to ensure these accesses are
realigned to 0-modulo-size alignments.
Word accesses map to 2-bytes from within a 4-byte field as shown in Table 5-10. Thus if address bits [1:0]
are both logic “1” the access is realigned so that it does not straddle the 4-byte boundary but accesses data
from within the addressed 4-byte field.
Table 5-9. CPU Register Number (CRN) Mapping
CPU Register Valid Data Bits Command Opcode Command Opcode
D0 [7:0] WRITE_D0 0x40 READ_D0 0x60
D1 [7:0] WRITE_D1 0x41 READ_D1 0x61
D2 [15:0] WRITE_D2 0x42 READ_D2 0x62
D3 [15:0] WRITE_D3 0x43 READ_D3 0x63
D4 [15:0] WRITE_D4 0x44 READ_D4 0x64
D5 [15:0] WRITE_D5 0x45 READ_D5 0x65
D6 [31:0] WRITE_D6 0x46 READ_D6 0x66
D7 [31:0] WRITE_D7 0x47 READ_D7 0x67
X [23:0] WRITE_X 0x48 READ_X 0x68
Y [23:0] WRITE_Y 0x49 READ_Y 0x69
SP [23:0] WRITE_SP 0x4A READ_SP 0x6A
PC [23:0] WRITE_PC 0x4B READ_PC 0x6B
CCR [15:0] WRITE_CCR 0x4C READ_CCR 0x6C
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Table 5-10. Field Location to Byte Access Mapping
5.4.5.2.1 FILL_MEM and DUMP_MEM Increments and Alignment
FILL_MEM and DUMP_MEM increment the previously accessed address by the previous acces s size to
calculate the address of the current access. On misaligned longword accesses, the address bits [1:0] are
forced to zero, therefore the following FILL_MEM or DUMP_MEM increment to the first address in the
next 4-byte field. This is shown in Table 5-11, the address of the first DUMP_MEM.32 following
READ_MEM.32 being calculated from 0x004000+4.
When misaligned word accesses are realigned, then the original address (not the realigned address) is
incremented for the following FILL_MEM, DUMP_MEM command.
Misaligned word accesses can cause the same locations to be read twice as shown in rows 6 and 7. The
hardware ensures alignment at an attempted misaligned word access across a 4-byte boundary, as shown
in row 7. The following word access in row 8 continues from the realigned address of row 7.
d
Address[1:0] Access Size 00 01 10 11 Note
00 32-bit Dat a[31:24] Data[23:16] Data [15:8] Data [7:0]
01 32-bit Dat a[31:24] Data[23:16] Data [15:8] Data [7:0] Realigned
10 32-bit Dat a[31:24] Data[23:16] Data [15:8] Data [7:0] Realigned
11 32-bit Dat a[31:24] Data[23:16] Data [15:8] Data [7:0] Realigned
00 16-bit Data [15:8] Data [7:0]
01 16-bit Data [15:8] Data [7:0]
10 16-bit Data [15:8] Data [7:0]
11 16-bit Data [15:8] Data [7:0] Realigned
00 8-bit Dat a [7:0]
01 8-bit Data [7:0]
10 8-bit Data [7:0]
11 8-bit Data [7:0]
Denotes byte that is not transmitted
Table 5-11. Consecutive Accesses With Variable Size
Row Command Address Address[1:0] 00 01 10 11
1 READ_MEM.32 0x004003 11 Accessed Accessed Accessed Accessed
2 DUMP_MEM.32 0x004004 00 Accessed Accessed Accessed Accessed
3 DUMP_MEM.16 0x004008 00 Accessed Accessed
4 DUMP_MEM.16 0x00400A 10 Accessed Accessed
5 DUMP_MEM.08 0x00400C 00 Accessed
6 DUMP_MEM.16 0x00400D 01 Accessed Accessed
7 DUMP_MEM.16 0x00400E 10 Accessed Accessed
8 DUMP_MEM.16 0x004010 01 Accessed Accessed
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5.4.5.2.2 READ_SAME Effects Of Variable Access Size
READ_SAME uses the unadjusted address given in the previous READ_MEM command as a base
address for subsequent READ_SAME commands. When the READ_MEM and READ_SAME size
parameters differ then READ_SAME uses the original base address buts aligns 32-bit and 16-bit accesses,
where those accesses would otherwise cross the aligned 4-byte boundary. Table 5-12 shows some
examples of this.
d
5.4.6 BDC Serial Interface
The BDC communicates with external devices serially via the BKGD pin. During reset, this pin is a mode
select input which selects between normal and special modes of operation. After reset, this pin becomes
the dedicated serial interface pin for the BDC.
The BDC serial interface uses an internal clock source, selected by the CLKSW bit in the BDCCSR
register. This clock is referred to as the target clock in the following explanation.
Table 5-12. Consecutive READ_SAME Accesses With Variable Size
Row Command Base Address 00 01 10 11
1 READ_MEM.32 0x004003 Accessed Accessed Accessed Accessed
2 READ_SAME.32 Accessed Accessed Accessed Accessed
3 READ_SAME.16 Accessed Accessed
4 READ_SAME.08 Accessed
5 READ_MEM.08 0x004000 Accessed
6 READ_SAME.08 Accessed
7 READ_SAME.16 Accessed Accessed
8 READ_SAME.32 Accessed Accessed Accessed Accessed
9 READ_MEM.08 0x004002 Accessed
10 READ_SAME.08 Accessed
11 READ_SAME.16 Accessed Accessed
12 READ_SAME.32 Accessed Accessed Accessed Accessed
13 READ_MEM.08 0x004003 Accessed
14 READ_SAME.08 Accessed
15 READ_SAME.16 Accessed Accessed
16 READ_SAME.32 Accessed Accessed Accessed Accessed
17 READ_MEM.16 0x004001 Accessed Accessed
18 READ_SAME.08 Accessed
19 READ_SAME.16 Accessed Accessed
20 READ_SAME.32 Accessed Accessed Accessed Accessed
21 READ_MEM.16 0x004003 Accessed Accessed
22 READ_SAME.08 Accessed
23 READ_SAME.16 Accessed Accessed
24 READ_SAME.32 Accessed Accessed Accessed Accessed
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The BDC serial interface uses a clocking scheme in which the external host generates a falling edge on the
BKGD pin to indicate the start of each bit time. This falling edge is sent for every bit whether data is
transmitted or received. Data is transferred most significant bit (MSB) first at 16 target clock cycles per
bit. The interface times out if during a command 512 clock cycles occur between falling edges from the
host. The timeout forces the current command to be discarded.
The BKGD pin is a pseudo open-drain pin and has a weak on-chip active pull-up that is enabled at all
times. It is assumed that there is an external pull-up and that drivers connected to BKGD do not typically
drive the high level. Since R-C rise time could be unacceptably long, the target system and host provide
brief drive-high (speedup) pulses to drive BKGD to a logic 1. The source of this speedup pulse is the host
for transmit cases and the target for receive cases.
The timing for host-to-target is shown in Figure 5-6 and that of target-to-host in Figure 5-7 and
Figure 5-8. All cases begin when the host drives the BKGD pin low to generate a falling edge. Since the
host and target operate from separate clocks, it can take the target up to one full clock cycle to recognize
this edge; this synchronization uncertainty is illustrated in Figure 5-6. The target measures delays from this
perceived start of the bit time while the host me asur es delays from the point it actually drove BKGD low
to start the bit up to one target clock cycle earlier. Synchronization between the host and target is
established in this manner at the start of every bit time.
Figure 5-6 shows an external host transmitting a logic 1 and transmitting a logic 0 to the BKGD pin of a
target system. The host is asynchronous to the target, so there is up to a one clock-cycle delay from the
host-generated falling edge to where the target recognizes this edge as the beginning of the bit time. Ten
target clock cycles later, the target senses the bit level on the BKGD pin. Internal glitch detect logic
requires the pin be driven high no later than eight target clock cycles after the falling edge for a logic 1
transmission.
Since the host drives the high speedup pulses in these two cases, the rising edges look like digitally driven
signals.
Figure 5-6. BDC Host-to-Target Serial Bit Timing
Figure 5-7 shows the host receiving a logic 1 from the target system. The host holds the BKGD pin low
long enough for the target to recognize it (at least two target clock cycles). The host must release the low
EARLIEST START
TARGET SENSES BIT LEVEL
10 CYCLES
SYNCHRONIZATION
UNCERTAINTY
BDCSI clock
(TARGET MCU)
HOST
TRANSMIT 1
HOST
TRANSMIT 0
PERCEIVED START
OF BIT TIME
OF NEXT BIT
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drive at the latest after 6 clock cycles, before the target drives a brief high speedup pulse seven target clock
cycles after the perceived start of the bit time. The host should sample the bit level about 10 target clock
cycles after it started the bit time.
Figure 5-7. BDC Target-to-Host Serial Bit Timing (Logic 1)
Figure 5-8 shows the host receiving a logic 0 from the target. The host initia tes the bit time but the target
finishes it. Since the target wants the host to receive a logic 0, it drives the BKGD pin low for 13 target
clock cycles then briefly drives it high to speed up the rising edge. The host samples the bit level about 10
target clock cycles after starting the bit time.
HOST SAMPLES BKGD PIN
10 CYCLES
BDCSI clock
(TARGET MCU)
HOST DRIVE
TO BKGD PIN
TARGET M CU
SPEEDUP PULSE
PERCEIVED START
OF BIT TIME
HIGH-IMPEDANCE
HIGH-IMPEDANCE HIGH-IMPEDANCE
BKGD PIN
R-C RISE
10 CYCLES
EARLIEST START
OF NEXT BIT
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Figure 5-8. BDC Target-to-Host Serial Bit Timing (Logic 0)
5.4.7 Serial Interface Hardware Handshake (ACK Pulse) Protocol
BDC commands are processed internally at the device core clock rate. Since the BDCSI clock can be
asynchronous relative to the bus frequency, a handshake protocol is provided so the host can determine
when an issued command has been executed. This section describes the hardware handshake protocol.
The hardware handshake protocol signals to the host controller when a BDC command has been executed
by the target. This protocol is implemented by a low pulse (16 BDCSI clock cycles) followed by a brief
speedup pulse on the BKGD pin, generated by the tar get MCU when a command, issued by the host, has
been successfully executed (see Figure 5-9). This pulse is referred to as the ACK pulse. After the ACK
pulse has finished, the host can start the bit retrieval if the last issued command was a read command, or
start a new command if the last command was a write command or a control command.
Figure 5-9. Target Acknowledge Pulse (ACK)
10 CYCLES
BDCSI clock
(TARGET MCU)
HOST DRIVE
TO BKGD PIN
TARGET M CU
DRIVE AND
PERCEIVED START
OF BIT TIME
HIGH-IMPEDANCE
BKGD PIN
10 CYCLES
SPEED-UP PULSE
SPEEDUP
PULSE
EARLIEST START
OF NEXT BIT
HOST SAMPLES BKGD PIN
16 CYCLES
BDCSI clock
(TARGET MCU)
TARGET
TRANSMITS
HIGH-IMPEDANCE
BKGD PIN
HIGH-IMPEDANCE
MINIMUM DELAY
FROM THE BDC COMMAND
32 CYCLES
EARLIEST
START OF
NEXT BIT
SPEED UP PULSE
16th CYCLE OF THE
LAST COMMAND BIT
ACK PULSE
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The handshake protocol is enabled by the ACK_ENABLE command. The BDC sends an ACK pulse when
the ACK_ENABLE command has been completed. This feature can be used by the host to evaluate if the
target supports the hardware handshake protocol. If an ACK pulse is issued in response to this command,
the host knows that the target supports the hardware handshake protocol.
Unlike the normal bit transfer, where the host initia tes the transmission by issuing a negative edge on the
BKGD pin, the serial interface ACK handshake pulse is initiated by the target MCU by issuing a negative
edge on the BKGD pin. Figure 5-9 specifies the timing when the BKGD pin is being driven. The host must
follow this timing constraint in order to avoid the risk of an electrical conflict at the BKGD pin.
When the handshake protocol is enabled, the STEAL bit in BDCCSR selects if bus cycle stealing is used
to gain immediate access. If STEAL is cleared, the BDC is configured for low priority bus access using
free cycles, without stealing cycles. This guarantees that BDC accesses remain truly non-intrusive to not
affect the system timing during debugging. If STEAL is set, the BDC gains immediate access, if necessary
stealing an internal bus cycle.
NOTE
If bus steals are disabled then a loop with no free cycles cannot allow access.
In this case the host must recognize repeated NORESP messages and then
issue a BACKGROUND command to stop the target and access the data.
Figure 5-10 shows the ACK handshake protocol without steal in a command level timing diagram. The
READ_MEM.B command is used as an example. First, the 8-bit command code is sent by the host,
followed by the address of the memory location to be read. The target BDC decodes the command. Then
an internal access is requested by the BDC. When a free bus cycle occurs the READ_MEM.B operation
is carried out. If no free cycle occurs within 512 core clock cycles then the access is aborted, the NORESP
flag is set and the target generates a Long-ACK pulse.
Having retrieved the data, the BDC issues an ACK pulse to the host controller, indicating that the
addressed byte is ready to be retrieved. After detecting the ACK pulse, the host initiates the data read part
of the command.
Figure 5-10. Handshake Protocol at Command Level
Alternatively, setting the STEAL bit configures the handshake protocol to make an immediate internal
access, independent of free bus cycles.
READ_MEM.B
BDC ISSUES THE
BYTE IS NEW BDC COMMAND
BKGD PIN ADDRESS[23–0]
MCU EXECUTES THE
READ_MEM.B
COMMAND
RETRIEVED
HOST T ARGET
HOST TARGET
HOST T ARGET
BDC DECODES
THE COMMAND
ACK PULSE (NOT TO SCALE)
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The ACK handshake protocol does not support nested ACK pulses. If a BDC command is not
acknowledged by an ACK pulse, the host needs to abort the pending command first in order to be able to
issue a new BDC command. The host can decide to abort any possible pending ACK pulse in order to be
sure a new command can be issued. Therefore, the protocol provides a mechanism in which a command,
and its corresponding ACK, can be aborted.
Commands With-Status do not generate an ACK, thus if ACK is enabled and a With-Status command is
issued, the host must use the 512 cycle timeout to calculate when the data is ready for retrieval.
5.4.7.1 Long-ACK Hardware Handshake Protocol
If a command results in an error condition, whereby a BDCCSRL flag is set, then the target generates a
“Long-ACK” low pulse of 64 BDCSI clock cycles, followed by a brief speed pulse. This indicates to the
host that an error has occurred. The host can subsequently read BDCCSR to determine the type of error.
Whether normal ACK or Long-ACK, the ACK pulse is not issued earlier than 32 BDCSI clock cycles after
the BDC command was issued. The end of the BDC command is assumed to be the 16th BDCSI clock
cycle of the last bit. The 32 cycle minimum delay dif fers from the 16 cycle delay time with ACK disabled.
If a BDC access request does not gain access within 512 core clock cycles, the request is aborted, the
NORESP flag is set and a Long-ACK pulse is transmitted to indicate an error case.
Following a STOP or WAI instruction, if the BDC is enabled, the first ACK, foll owing stop or wait mode
entry is a long ACK to indicate an exception.
5.4.8 Hardware Handshake Abort Procedure
The abort procedure is based on the SYNC command. To abort a command that has not responded with an
ACK pulse, the host controller generates a sync request (by driving BKGD low for at least 128 BDCSI
clock cycles and then driving it high for one BDCSI clock cycle as a speedup pulse). By detecting this long
low pulse in the BKGD pin, the target executes the SYNC protocol, see Section 5.4.4.1”, and assumes that
the pending command and therefore the related ACK pulse are being aborted. After the SYNC protocol
has been completed the host is free to issue new BDC commands.
The host can issue a SYNC close to the 128 clock cycles length, providing a small overhead on the pulse
length to assure the sync pulse is not misinterpreted by the target. See Section 5.4.4.1”.
Figure 5-11 shows a SYNC command being issued after a READ_MEM, which aborts the READ_MEM
command. Note that, after the command is aborted a new command is issued by the host.
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Figure 5-11. ACK Abort Procedure at the Command Level (Not To Scale)
Figure 5-12 shows a conflict between the ACK pulse and the SYNC request pulse. The tar get is executing
a pending BDC command at the exact moment the host is being connected to the BKGD pin. In this case,
an ACK pulse is issued simultaneously to the SYNC command. Thus there is an electrical conflict between
the ACK speedup pulse and the SYNC pulse. As this is not a probable situation, the protocol does not
prevent this conflict from happening.
Figure 5-12. ACK Pulse and SYNC Request Conflict
5.4.9 Hardware Handshake Disabled (ACK Pulse Disabled)
The default state of the BDC after reset is hardware handshake protocol disabled. It can also be disabled
by the ACK_DISABLE BDC command. This provides backwards compatibility with the existing host
devices which are not able to execute the hardware handshake protocol. For host devices that support the
hardware handshake protocol, true non-intrusive debugging and error flagging is offered.
If the ACK pulse protocol is disabled, the host needs to use the worst case delay time at the appropriate
places in the protocol.
READ_MEM.B READ_BDCCSR
BKGD PIN ADDRESS[23-0]
HOST T ARGET
BDC DECODES
READ_MEM.B CMD
IS ABORTED BY THE SYNC REQUEST
NEW BDC COMMAND
AND TRYS TO EXECUTE
HOST T ARGET HOST T ARGET
SYNC RESPONSE
FROM THE TARGET
NEW BDC COMMAND
(NOT TO SCALE) (NOT TO SCALE)
BDCSI clock
(TARGET MCU)
TARGET M CU
DRIVES TO
BKGD PIN
BKGD PIN
16 CYCLES
SPEEDUP PULSE
HIGH-IMPEDANCE
HOST
DRIVES SYNC
TO BKGD PIN
HOST AND TARGET
ACK PULSE
HOST SYNC REQUEST PULSE
AT LEAST 128 CYCLES
ELECTRICAL CONFLICT
DRIVE TO BKGD PIN
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If the handshake protocol is disabled, the access is always independent of free cycles, whereby BDC has
higher priority than CPU. Since at least 2 bytes (command byte + data byte) are transferred over BKGD
the maximum intrusiveness is only once every few hundred cycles.
After decoding an internal access command, the BDC then awaits the next internal core clock cycle. The
relationship between BDCSI clock and core clock must be considered. If the host retrieves the data
immediately, then the BDCSI clock frequency must not be more than 4 times the core clock frequency, in
order to guarantee that the BDC gains bus access within 16 the BDCSI cycle DLY period following an
access command. If the BDCSI clock frequency is more than 4 times the core clock frequency, then the
host must use a suitable delay time before retrieving data (see 5.5.1/5-214). Furthermore, for stretched read
accesses to external resources via a device expanded bus (if implemented) the potential extra stretch cycles
must be taken into consideration before attempting to obtain read data.
If the access does not succeed before the host starts data retrieval then the NORESP flag is set but the
access is not aborted. The NORESP state can be used by the host to recognize an unexpected access
conflict due to stretched expanded bus accesses. Although the NORESP bit is set when an access does not
succeed before the start of data retrieval, the access may succeed in following bus cycles if the internal
access has already been initiated.
5.4.10 Single Stepping
When a STEP1 command is issued to the BDC in active BDM, the CPU executes a single instruction in
the user code and returns to active BDM. The STEP1 command can be issued repeatedly to step through
the user code one instruction at a time.
If an interrupt is pending when a STEP1 command is issued, the interrupt stacking operation occurs but
no user instruction is executed. In this case the stacking counts as one instruction. The device re-enters
active BDM with the program counter pointing to the first instruction in the interrupt service routine.
When stepping through the user code, the execution of the user code is done step by step but peripherals
are free running. Some peripheral modules include a freeze feature, whereby their cloc ks are halted when
the device enters active BDM. Timer modules typically include the freeze feature. Serial interface modules
typically do not include the freeze feature. Hence possible timing rela tions between CPU code execution
and occurrence of events of peripherals no longer exist.
If the handshake protocol is enabled and BDCCIS is set then stepping over the STOP instruction causes
the Long-ACK pulse to be generated and the BDCCSR STOP flag to be set. When stop mode is exited due
to an interrupt the device enters active BDM and the PC points to the start of the corresponding interrupt
service routine. Stepping can be continued.
S tepping over a WAI instruction, the STEP1 command cannot be finished because active BDM cannot be
entered after CPU starts to execute the WAI instruction.
Stepping over the WAI instruction causes the BDCCSR WAIT and NORESP flags to be set and, if the
handshake protocol is enabled, then the Long-ACK pulse is generated. Then the device enters wait mode,
clears the BDMACT bit and awaits an interrupt to leave wait mode. In this time non-intrusive BDC
commands are possible, although the STEP1 has actually not finished. When an interrupt occurs the device
leaves wait mode, enters active BDM and the PC points to the start of the corresponding interrupt service
routine. A further ACK related to stepping over the WAI is not generated.
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5.4.11 Serial Communication Timeout
The host initiates a host-to-target serial transmission by generating a falling edge on the BKGD pin. If
BKGD is kept low for more than 128 target clock cycles, the target understands that a SYNC command
was issued. In this case, the target waits for a rising edge on BKGD in order to answer the SYNC request
pulse. When the BDC detects the rising edge a soft reset is generated, whereby the current BDC command
is discarded. If the rising edge is not detected, the target keeps waiting forever without any timeout limit.
If a falling edge is not detected by the target within 512 clock cycles since the last falling edge, a timeout
occurs and the current command is discarded without affecting memory or the operating mode of the
MCU. This is referred to as a soft-reset. This timeout also applies if 512 cycles elapse between 2
consecutive ERASE_FLASH commands. The soft reset is disabled whilst the internal flash mass erase
operation is pending completion.
timeouts are also possible if a BDC command is partially issued, or data partially retrieved. Thus if a time
greater than 512 BDCSI clock cycles is observed between two consecutive negative edges, a soft-reset
occurs causing the partially received command or data retrieved to be discarded. The next negative edge
at the BKGD pin, after a soft-reset has occurred, is considered by the target as the start of a new BDC
command, or the start of a SYNC request pulse.
5.5 Application Information
5.5.1 Clock Frequency Considerations
Read commands without status and without ACK must consider the frequency relationship between
BDCSI and the internal core clock. If the core clock is slow, then the internal access may not have been
carried out within the standard 16 BDCSI cycle delay period (DLY). The host must then extend the DLY
period or clock frequencies accordingly. Taking internal clock domain synchronizers into account, the
minimum number of BDCSI periods required for the DLY is expressed by:
#DLY > 3(f(BDCSI clock) / f(core clock)) + 4
and the minimum core clock frequency with respect to BDCSI clock frequency is expressed by
Minimum f(core clock) = (3/(#DLY cycles -4))f(BDCSI clock)
For the standard 16 period DLY this yields f(core clock)>= (1/4)f(BDCSI clock)
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Chapter 6
S12Z Debug (S12ZDBG) Module
6.1 Introduction
NOTE
Device reference manuals specify which S12Z Debug module version is
integrated on the device. Some reference manuals support families of
devices, with device dependent Debug module versions. This chapter
describes the superset. The feature differences are listed in Table 6-2.
Table 6-2. Comparison of S12Z Debug Module Versions
Table 6-1. Revision History Table
Revision
Number
Revision
Date
Sections
Affected Description Of Changes
2.08 16.NOV.2012 Section 6.5.1 Modified step over breakpoint information
2.09 19.DEC.2012 General Formatting corrections
2.10 28.JUN.2013 General
Section 6.3.2.21
Section 6.3.2.1
Section 6.3.2.5
Emphasized need to set TSOURCE for tracing or profiling
Corrected DBGCDM write access dependency
Corrrected ARM versus PTACT dependency
Modified DBGTBH read access dependencies
2.11 15.JUL.2013 Section 6.3.2 Added explicit names to state control register bit fields
4.00 18.SEP.2013 General Added PREND bit to improve usability of profiling format for debugging
4.01 18.OCT.2013 Section 6.4.5.4
Section 6.4.6.3
Removed trace buffer read dependence on PROFILE bit
Corrected reference to timestamp clock source in profiling mode
4.02 03.FEB.2015 Section 6.1 Updated Table 6-2 and preceding NOTE to support V2, V3 and V4
S12Z Debug V2 S12Z Debug V4 S12Z Debug V3 (Lite)
Tracing included Tracing included Tracing not included
Profiling included Profiling included Profiling not included
Comparator C included Comparator C included Comparator C not included
Match 2 trigger included Match 2 trigger included Match 2 trigger not included
PREND bit not included PREND bit included PREND bit not included
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The DBG module provides on-chip breakpoints and trace buffer with flexible triggering capability to allow
non-intrusive debug of application software. The DBG module is optimized for the S12Z architecture and
allows debugging of CPU module operations.
Typically the DBG module is used in conjunction with the BDC module, whereby the user configures the
DBG module for a debugging session over the BDC interface. Once configured the DBG module is armed
and the device leaves active BDM returning control to the user program, which is then monitored by the
DBG module. Alternatively the DBG module can be configured over a serial interface using SWI routines.
6.1.1 Glossary
6.1.2 Overview
The comparators monitor the bus activity of the CPU. A single comparator match or a series of matches
can trigger bus tracing and/or generate breakpoints. A state sequencer determines if the correct series of
matches occurs. Similarly an external event can trigger bus tracing and/or generate breakpoints.
The trace buffer is visible through a 2- byte window in the register address map and can be read out using
standard 16-bit word reads.
6.1.3 Features
Four comparators (A, B, C, and D)
Comparators A and C compare the full address bus and full 32-bit data bus
Comparators A and C feature a data bus mask register
Comparators B and D compare the full address bus only
Each comparator can be configured to monitor PC addresses or addresses of data accesses
Each comparator can select either read or write access cycles
Comparator matches can force state sequencer state transitions
Table 6-3. Glossary Of Terms
Term Definition
COF Change Of Flow.
Change in the program flow due to a conditional branch, indexed jump or interrupt
PC Program Counter
BDM Background Debug Mode.
In this mode CPU application code execution is halted.
Execution of BDC “active BDM” commands is possible.
BDC Background Debug Controller
WORD 16-bit data entity
Data Line 64-bit data entity
CPU S12Z CPU module
Trigger A trace buffer input that triggers tracing start, end or mid point
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Three comparator modes
Simple address/data comparator match mode
Inside address range mode, Addmin Address Addmax
Outside address range match mode, Address Addminor Address Addmax
State sequencer control
State transitions forced by comparator matches
State transitions forced by software write to TRIG
State transitions forced by an external event
The following types of breakpoints
CPU breakpoint entering active BDM on breakpoint (BDM)
CPU breakpoint executing SWI on breakpoint (SWI)
Trace control
Tracing session triggered by state sequencer
Begin, End, and Mid alignment of tracing to trigger
Four trace modes
Normal: change of flow (COF) PC information is stored (see Section 6.4.5.2.1) for change of
flow definition.
Loop1: same as Normal but inhibits consecutive duplicate source address entries
Detail: address and data for all read/write access cycles are stored
Pure PC: All program counter addresses are stored.
2 Pin (data and clock) profiling interface
Output of code flow information
6.1.4 Modes of Operation
The DBG module can be used in all MCU functional modes.
The DBG module can issue breakpoint requests to force the device to enter active BDM or an SWI ISR.
The BDC BACKGROUND command is also handled by the DBG to force the device to enter active BDM.
When the device enters active BDM through a BACKGROUND command with the DBG module armed,
the DBG remains armed.
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6.1.5 Block Diagram
B
Figure 6-1. Debug Module Block Diagram
6.2 External Signal Description
6.2.1 External Event Input
The DBG module features an external event input signal, DBGEEV. The mapping of this signal to a device
pin is specified in the device specific documentation. This function can be enabled and configured by the
EEVE field in the DBGC1 control register. This signal is input only and allows an external event to force
a state sequencer transition, or trace buffer entry, or to gate trace buffer entries. With the external event
function enabled, a falling edge at the external event pin constitutes an event. Rising edges have no effect.
If configured for gating trace buffer entries, then a low level at the pin allows entries, but a high level
suppresses entries. The maximum frequency of events is half the internal core bus frequency . The function
is explained in the EEVE field description.
NOTE
Due to input pin synchronization circuitry, the DBG module sees external
events 2 bus cycles after they occur at the pin. Thus an external event
occurring less than 2 bus cycles before arming the DBG module is perceived
to occur whilst the DBG is armed.
When the device is in stop mode the synchronizer clocks are disabled and
the external events are ignored.
CPU BUS
TRACE BUFFER
BUS INTERFACE
MATCH0
COMPARATOR B
COMPARATOR C
COMPARATOR D
COMPARATOR A STATE SEQUENCER
MATCH1
MATCH2
MATCH3
TRACE
READ TRACE DATA (DBG READ DATA BUS)
CONTROL
BREAKPOINT
COMPARATOR
MATCH CONTROL
TRIGGER
AND
EVENT CONTROL
REQUESTS
REGISTERS TRIG
PROFILE
OUTPUT
EXTERNAL EVENT
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6.2.2 Profiling Output
The DBG module features a profiling data output signal PDO. The mapping of this signal to a device pin
is specified in the device specific documentation. The device pin is enabled for profiling by setting the
PDOE bit. The profiling function can be enabled by the PROFILE bit in the DBGTCRL control register.
This signal is output only and provides a serial, encoded data stream that can be used by external
development tools to reconstruct the internal CPU code flow, as specified in Section 6.4.6. During code
profiling the device PDOCLK output is used as a clock signal.
6.3 Memory Map and Registers
6.3.1 Module Memory Map
A summary of the registers associated with the DBG module is shown in Figure 6-2. Detailed descriptions
of the registers and bits are given in the subsections that follow.
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0100 DBGC1 RARM 0reserved BDMBP BRKCPU reserved EEVE
WTRIG
0x0101 DBGC2 R0 0 0 0 CDCM ABCM
W
0x0102 DBGTCRH Rreserved TSOURCE TRANGE TRCMOD TALIGN
W
0x0103 DBGTCRL R0 0 0 PREND DSTAMP PDOE PROFILE STAMP
W
0x0104 DBGTB R Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
0x0105 DBGTB RBit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
W
0x0106 DBGCNT R0 CNT
W
0x0107 DBGSCR1 RC3SC1 C3SC0 C2SC1 C2SC0 C1SC1 C1SC0 C0SC1 C0SC0
W
0x0108 DBGSCR2 RC3SC1 C3SC0 C2SC1 C2SC0 C1SC1 C1SC0 C0SC1 C0SC0
W
0x0109 DBGSCR3 RC3SC1 C3SC0 C2SC1 C2SC0 C1SC1 C1SC0 C0SC1 C0SC0
W
0x010A DBGEFR R PTBOVF TRIGF 0 EEVF ME3 ME2 ME1 ME0
W
0x010B DBGSR R TBF 0 0 PTACT 0 SSF2 SSF1 SSF0
W
Figure 6-2. Quick Reference to DBG Registers
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0x010C-
0x010F Reserved R00000000
W
0x0110 DBGACTL R0 NDB INST 0RW RWE reserved COMPE
W
0x0111-
0x0114 Reserved R00000000
W
0x0115 DBGAAH RDBGAA[23:16]
W
0x0116 DBGAAM RDBGAA[15:8]
W
0x0117 DBGAAL RDBGAA[7:0]
W
0x0118 DBGAD0 RBit 31 30 29 28 27 26 25 Bit 24
W
0x0119 DBGAD1 RBit 23 22 21 20 19 18 17 Bit 16
W
0x011A DBGAD2 RBit 15 14 13 12 11 10 9 Bit 8
W
0x011B DBGAD3 RBit 7654321Bit 0
W
0x011C DBGADM0 RBit 31 30 29 28 27 26 25 Bit 24
W
0x011D DBGADM1 RBit 23 22 21 20 19 18 17 Bit 16
W
0x011E DBGADM2 RBit 15 14 13 12 11 10 9 Bit 8
W
0x011F DBGADM3 RBit 7654321Bit 0
W
0x0120 DBGBCTL R0 0 INST 0RW RWE reserved COMPE
W
0x0121-
0x0124 Reserved R00000000
W
0x0125 DBGBAH RDBGBA[23:16]
W
0x0126 DBGBAM RDBGBA[15:8]
W
0x0127 DBGBAL RDBGBA[7:0]
W
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Figure 6-2. Quick Reference to DBG Registers
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0x0128-
0x012F Reserved R00000000
W
0x0130 DBGCCTL R0 NDB INST 0RW RWE reserved COMPE
W
0x0131-
0x0134 Reserved R00000000
W
0x0135 DBGCAH RDBGCA[23:16]
W
0x0136 DBGCAM RDBGCA[15:8]
W
0x0137 DBGCAL RDBGCA[7:0]
W
0x0138 DBGCD0 RBit 31 30 29 28 27 26 25 Bit 24
W
0x0139 DBGCD1 RBit 23 22 21 20 19 18 17 Bit 16
W
0x013A DBGCD2 RBit 15 14 13 12 11 10 9 Bit 8
W
0x013B DBGCD3 RBit 7654321Bit 0
W
0x013C DBGCDM0 RBit 31 30 29 28 27 26 25 Bit 24
W
0x013D DBGCDM1 RBit 23 22 21 20 19 18 17 Bit 16
W
0x013E DBGCDM2 RBit 15 14 13 12 11 10 9 Bit 8
W
0x013F DBGCDM3 RBit 7654321Bit 0
W
0x0140 DBGDCTL R0 0 INST 0RW RWE reserved COMPE
W
0x0141-
0x0144 Reserved R00000000
W
0x0145 DBGDAH RDBGDA[23:16]
W
0x0146 DBGDAM RDBGDA[15:8]
W
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Figure 6-2. Quick Reference to DBG Registers
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6.3.2 Register Descriptions
This section consists of the DBG register descriptions in address order. When ARM is set in DBGC1, the
only bits in the DBG module registers that can be written are ARM, and TRIG
6.3.2.1 Debug Control Register 1 (DBGC1)
Read: Anytime
W rite: Bit 7 Anytime with the exception that it cannot be set if PTACT is set. An ongoing profiling session
must be finished before DBG can be armed again.
Bit 6 can be written anytime but always reads back as 0.
Bits 5:0 anytime DBG is not armed and PTACT is clear.
NOTE
On a write access to DBGC1 and simultaneous hardware disarm from an
internal event, the hardware disarm has highest priority, clearing the ARM
bit and generating a breakpoint, if enabled.
NOTE
When disarming the DBG by clearing ARM with software, the contents of
bits[5:0] are not affected by the write, since up until the write operation,
ARM = 1 preventing these bits from being written. These bits must be
cleared using a second write if required.
0x0147 DBGDAL RDBGDA[7:0]
W
0x0148-
0x017F Reserved R00000000
W
Address: 0x0100
76543210
0x0100 ARM 0reserved BDMBP BRKCPU reserved EEVE
TRIG
Reset00000000
Figure 6-3. Debug Control Register (DBGC1)
Table 6-4. DBGC1 Field Descriptions
Field Description
7
ARM
Arm Bit — The ARM bit controls whether the DBG module is armed. This bit can be set and cleared by register
writes and is automatically cleared when the state sequencer returns to State0 on completing a debugging
session. On setting this bit the state sequencer enters State1.
0 Debugger disarmed. No breakpoint is generated when clearing this bit by software register writes.
1 Debugger armed
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Figure 6-2. Quick Reference to DBG Registers
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6.3.2.2 Debug Control Register2 (DBGC2)
Read: Anytime.
Write: Anytime the module is disarmed and PTACT is clear.
This register configures the comparators for range matching.
6
TRIG
Immediate Trigger Request Bit — This bit when written to 1 requests an immediate transition to final state
independent of comparator status. This bit always reads back a 0. Writing a 0 to this bit has no effect.
0 No effect.
1 Force state sequencer immediately to final state.
4
BDMBP
Background Debug Mode Enable — This bit determines if a CPU breakpoint causes the system to enter
Background Debug Mode (BDM) or initiate a Software Interrupt (SWI). If this bit is set but the BDC is not enabled,
then no breakpoints are generated.
0 Breakpoint to Software Interrupt if BDM inactive. Otherwise no breakpoint.
1 Breakpoint to BDM, if BDC enabled. Otherwise no breakpoint.
3
BRKCPU
CPU Breakpoint Enable — The BRKCPU bit controls whether the debugger requests a breakpoint to CPU upon
transitions to State0. If tracing is enabled, the breakpoint is generated on completion of the tracing session. If
tracing is not enabled, the breakpoint is generated immediately. Please refer to Section 6.4.7 for further details.
0 Breakpoints disabled
1 Breakpoints enabled
1–0
EEVE
External Event Enable — The EEVE bits configure the external event function. Tabl e 6-5 explains the bit
encoding.
Table 6-5. EEVE Bit Encoding
EEVE Description
00 External event function disabled
01 External event forces a trace buffer entry if tracing is enabled
10 External event is mapped to the state sequencer, replacing comparator channel 3
11 External event pin gates trace buffer entries
Address: 0x0101
76543210
R0 0 0 0 CDCM ABCM
W
Reset00000000
= Unimplemented or Reserved
Figure 6-4. Debug Control Register2 (DBGC2)
Table 6-6. DBGC2 Field Descriptions
Field Description
3–2
CDCM[1:0]
C and D Comparator Match Control — These bits determine the C and D comparator match mapping as
described in Table 6-7.
Table 6-4. DBGC1 Field Descriptions (continued)
Field Description
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6.3.2.3 Debug Trace Control Register High (DBGTCRH)
Read: Anytime.
Write: Anytime the module is disarmed and PTACT is clear.
WARNING
DBGTCR[7] is reserved. Setting this bit maps the tracing to an unimplemented bus, thus
preventing proper operation.
This register configures the trace buffer for tracing and profiling.
1–0
ABCM[1:0]
A and B Comparator Match Control These bits determine the A and B comparator match mapping as
described in Table 6-8.
Table 6-7. CDCM Encoding
CDCM Description
00 Match2 mapped to comparator C match....... Match3 mapped to comparator D match.
01 Match2 mapped to comparator C/D inside range....... Match3 disabled.
10 Match2 mapped to comparator C/D outside range....... Match3 disabled.
11 Reserved(1)
1. Currently defaults to Match2 mapped to inside range: Match3 disabled.
Table 6-8. ABCM Encoding
ABCM Description
00 Match0 mapped to comparator A match....... Match1 mapped to comparator B match.
01 Match0 mapped to comparator A/B inside range....... Match1 disabled.
10 Match0 mapped to comparator A/B outside range....... Match1 disabled.
11 Reserved(1)
1. Currently defaults to Match0 mapped to inside range: Match1 disabled
Address: 0x0102
76543210
Rreserved TSOURCE TRANGE TRCMOD TALIGN
W
Reset00000000
Figure 6-5. Debug Trace Control Register (DBGTCRH)
Table 6-6. DBGC2 Field Descriptions (continued)
Field Description
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Table 6-9. DBGTCRH Field Descriptions
Field Description
6
TSOURCE
Trace Control Bits — The TSOURCE enables the tracing session.
0 No CPU tracing/profiling selected
1 CPU tracing/profiling selected
5–4
TRANGE
Trace Range Bits — The TRANGE bits allow filtering of trace information from a selected address range when
tracing from the CPU in Detail mode. These bits have no effect in other tracing modes. To use a comparator for
range filtering, the corresponding COMPE bit must remain cleared. If the COMPE bit is set then the comparator
is used to generate events and the TRANGE bits have no effect. See Table 6-10 for range boundary definition.
3–2
TRCMOD
Trace Mode BitsSee Section 6.4.5.2 for detailed Trace Mode descriptions. In Normal Mode, change of flow
information is stored. In Loop1 Mode, change of flow information is stored but redundant entries into trace
memory are inhibited. In Detail Mode, address and data for all memory and register accesses is stored. See
Table 6-11.
1–0
TALIGN
Trigger Align Bits — These bits control whether the trigger is aligned to the beginning, end or the middle of a
tracing or profiling session. See Ta bl e 6- 12 .
Table 6-10. TRANGE Trace Range Encoding
TRANGE T racing Range
00 Trace from all addresses (No filter)
01 Trace only in address range from $00000 to Comparator D
10 Trace only in address range from Comparator C to $FFFFFF
11 Trace only in range from Comparator C to Comparator D
Table 6-11. TRCMOD Trace Mode Bit Encoding
TRCMOD Description
00 Normal
01 Loop1
10 Detail
11 Pure PC
Table 6-12. TALIGN Trace Alignment Encoding
TALIGN Description
00 Trigger ends data trace
01 Trigger starts data trace
10 32 lines of data trace follow trigger
11(1)
1. Tracing/Profiling disabled.
Reserved
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6.3.2.4 Debug Trace Control Register Low (DBGTCRL)
Read: Anytime.
Write: Anytime the module is disarmed and PTACT is clear.
This register configures the profiling and timestamp features
Address: 0x0103
76543210
R0 0 0 PREND DSTAMP PDOE PROFILE STAMP
W
Reset00000000
= Unimplemented or Reserved
Figure 6-6. Debug Trace Control Register Low (DBGTCRL)
Table 6-13. DBGTCRL Field Descriptions
Field Description
4
PREND
Profiling End — This bit, when set, forces the profiling session to end when the trace buffer has been filled. This
prevents a rollover of the trace buffer from overwriting the initial entry containing the start address
0 Trace buffer rollover is enabled during profiling. After the last line has been filled, the entries continue, starting
at line0 and overwriting the older data
1 Trace buffer rollover is disabled during profiling. When the trace buffer is full, the profilling session ends, the
PTBOVF bit is set and the ARM bit is cleared.
3
DSTAMP
Comparator D Timestamp Enable — This bit, when set, enables Comparator D matches to generate
timestamps in Detail, Normal and Loop1 trace modes.
0 Comparator D match does not generate timestamp
1 Comparator D match generates timestamp if timestamp function is enabled
2
PDOE
Profile Data Out Enable — This bit, when set, configures the device profiling pins for profiling.
0 Device pins not configured for profiling
1 Device pins configured for profiling
1
PROFILE
Profile Enable — This bit, when set, enables the profile function, whereby a subsequent arming of the DBG
activates profiling.
When PROFILE is set, the TRCMOD bits are ignored.
0 Profile function disabled
1 Profile function enabled
0
STAMP
Timestamp Enable — This bit, when set, enables the timestamp function. The timestamp function adds a
timestamp to each trace buffer entry in Detail, Normal and Loop1 trace modes.
0 Timestamp function disabled
1 Timestamp function enabled
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6.3.2.5 Debug Trace Buffer Register (DBGTB)
Read: Only when unlocked AND not armed and the TSOURCE bit is set, otherwise an error code (0xEE)
is returned. Only aligned word read operations are supported. Misaligned word reads or byte reads return
the error code 0xEE for each byte.
W rite: Aligned word writes when the DBG is disarmed and the PTACT is clear unlock the trace buffer for
reading but do not affect trace buffer contents.
6.3.2.6 Debug Count Register (DBGCNT)
Read: Anytime.
Write: Never.
Address: 0x0104, 0x0105
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
PORXXXXXXXXXXXXXXXX
Other
Resets ————————————————
Figure 6-7. Debug Trace Buffer Register (DBGTB)
Table 6-14. DBGTB Field Descriptions
Field Description
15–0
Bit[15:0]
Trace Buffer Data Bits — The Trace Buffer Register is a window through which the lines of the trace buffer may
be read 16 bits at a time. Each valid read of DBGTB increments an internal trace buffer pointer which points to
the next address to be read. When the ARM bit is written to 1 the trace buffer is locked to prevent reading. The
trace buffer can only be unlocked for reading by writing to DBGTB with an aligned word write when the module
is disarmed. The DBGTB register can be read only as an aligned word. Byte reads or misaligned access of these
registers returns 0xEE and does not increment the trace buffer pointer. Similarly word reads while the debugger
is armed or trace buffer is locked return 0xEEEE. The POR state is undefined Other resets do not affect the trace
buffer contents.
Address: 0x0106
76543210
R 0 CNT
W
Reset
POR
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 6-8. Debug Count Register (DBGCNT)
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6.3.2.7 Debug State Control Register 1 (DBGSCR1)
Read: Anytime.
Write: If DBG is not armed and PTACT is clear.
The state control register 1 selects the tar geted next state whilst in State1. The matches refer to the outputs
of the comparator match control logic as depicted in Figure 6-1 and described in Section 6.3.2.12”.
Comparators must be enabled by setting the comparator enable bit in the associated DBGXCTL control
register.
Table 6-15. DBGCNT Field Descriptions
Field Description
6–0
CNT[6:0]
Count Value — The CNT bits [6:0] indicate the number of valid data lines stored in the trace buffer. Ta bl e 6- 16
shows the correlation between the CNT bits and the number of valid data lines in the trace buffer. When the CNT
rolls over to zero, the TBF bit in DBGSR is set. Thereafter incrementing of CNT continues if configured for end-
alignment or mid-alignment.
The DBGCNT register is cleared when ARM in DBGC1 is written to a one. The DBGCNT register is cleared by
power-on-reset initialization but is not cleared by other system resets. If a reset occurs during a debug session,
the DBGCNT register still indicates after the reset, the number of valid trace buffer entries stored before the reset
occurred. The DBGCNT register is not decremented when reading from the trace buffer.
Table 6-16. CNT Decoding Table
TBF (DBGSR) CNT[6:0] Description
0 0000000 No data valid
0 0000001 32 bits of one line valid
0 0000010
0000100
0000110
..
1111100
1 line valid
2 lines valid
3 lines valid
..
62 lines valid
0 1111110 63 l ines v alid
1 0000000 64 lines valid; if using Begin trigger alignment,
ARM bit is cleared and the tracing session ends.
1 0000010
..
1111110
64 lines valid,
oldest data has been overwritten by most recent data
Address: 0x0107
76543210
RC3SC1 C3SC0 C2SC1 C2SC0 C1SC1 C1SC0 C0SC1 C0SC0
W
Reset00000000
Figure 6-9. Debug State Control Register 1 (DBGSCR1)
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In the case of simultaneous matches, the match on the higher channel number (3...0) has priority.
6.3.2.8 Debug State Control Register 2 (DBGSCR2)
Read: Anytime.
Write: If DBG is not armed and PTACT is clear.
The state control register 2 selects the tar geted next state whilst in State2. The matches refer to the outputs
of the comparator match control logic as depicted in Figure 6-1 and described in Section 6.3.2.12”.
Comparators must be enabled by setting the comparator enable bit in the associated DBGXCTL control
register.
Table 6-17. DBGSCR1 Field Descriptions
Field Description
1–0
C0SC[1:0]
Channel 0 State Control.
These bits select the targeted next state whilst in State1 following a match0.
3–2
C1SC[1:0]
Channel 1 State Control.
These bits select the targeted next state whilst in State1 following a match1.
5–4
C2SC[1:0]
Channel 2 State Control.
These bits select the targeted next state whilst in State1 following a match2.
7–6
C3SC[1:0]
Channel 3 State Control.
If EEVE !=10, these bits select the targeted next state whilst in State1 following a match3.
If EEVE = 10, these bits select the targeted next state whilst in State1 following an external event.
Table 6-18. State1 Match State Sequencer Transitions
CxSC[1:0] Function
00 Match has no effect
01 Match forces sequencer to State2
10 Match forces sequencer to State3
11 Match forces sequencer to Final State
Address: 0x0108
76543210
RC3SC1 C3SC0 C2SC1 C2SC0 C1SC1 C1SC0 C0SC1 C0SC0
W
Reset00000000
Figure 6-10. Debug State Control Register 2 (DBGSCR2)
Table 6-19. DBGSCR2 Field Descriptions
Field Description
1–0
C0SC[1:0]
Channel 0 State Control.
These bits select the targeted next state whilst in State2 following a match0.
3–2
C1SC[1:0]
Channel 1 State Control.
These bits select the targeted next state whilst in State2 following a match1.
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In the case of simultaneous matches, the match on the higher channel number (3...0) has priority.
6.3.2.9 Debug State Control Register 3 (DBGSCR3)
Read: Anytime.
Write: If DBG is not armed and PTACT is clear.
The state control register three selects the targeted next state whilst in State3. The matches refer to the
outputs of the comparator match control logic as depicted in Figure 6-1 and described in Section 6.3.2.12”.
Comparators must be enabled by setting the comparator enable bit in the associated DBGxCTL control
register.
5–4
C2SC[1:0]
Channel 2 State Control.
These bits select the targeted next state whilst in State2 following a match2.
7–6
C3SC[1:0]
Channel 3 State Control.
If EEVE !=10, these bits select the targeted next state whilst in State2 following a match3.
If EEVE =10, these bits select the targeted next state whilst in State2 following an external event.
Table 6-20. State2 Match State Sequencer Transitions
CxSC[1:0] Function
00 Match has no effect
01 Match forces sequencer to State1
10 Match forces sequencer to State3
11 Match forces sequencer to Final State
Address: 0x0109
76543210
RC3SC1 C3SC0 C2SC1 C2SC0 C1SC1 C1SC0 C0SC1 C0SC0
W
Reset00000000
Figure 6-11. Debug State Control Register 3 (DBGSCR3)
Table 6-21. DBGSCR3 Field Descriptions
Field Description
1–0
C0SC[1:0]
Channel 0 State Control.
These bits select the targeted next state whilst in State3 following a match0.
3–2
C1SC[1:0]
Channel 1 State Control.
These bits select the targeted next state whilst in State3 following a match1.
5–4
C2SC[1:0]
Channel 2 State Control.
These bits select the targeted next state whilst in State3 following a match2.
Table 6-19. DBGSCR2 Field Descriptions (continued)
Field Description
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In the case of simultaneous matches, the match on the higher channel number (3....0) has priority.
6.3.2.10 Debug Event Flag Register (DBGEFR)
Read: Anytime.
Write: Never
DBGEFR contains flag bits each mapped to events whilst armed. Should an event occur, then the
corresponding flag is set. With the exception of TRIGF, the bits can only be set when the ARM bit is set.
The TRIGF bit is set if a TRIG event occurs when ARM is already set, or if the TRIG event occurs
simultaneous to setting the ARM bit.All other flags can only be cleared by arming the DBG module. Thus
the contents are retained after a debug session for evaluation purposes.
A set flag does not inhibit the setting of other flags.
7–6
C3SC[1:0]
Channel 3 State Control.
If EEVE !=10, these bits select the targeted next state whilst in State3 following a match3.
If EEVE =10, these bits select the targeted next state whilst in State3 following an external event.
Table 6-22. State3 Match State Sequencer Transitions
CxSC[1:0] Function
00 Match has no effect
01 Match forces sequencer to State1
10 Match forces sequencer to State2
11 Match forces sequencer to Final State
Address: 0x010A
76543210
R PTBOVF TRIGF 0 EEVF ME3 ME2 ME1 ME0
W
Reset00000000
= Unimplemented or Reserved
Figure 6-12. Debug Event Flag Register (DBGEFR)
Table 6-23. DBGEFR Field Descriptions
Field Description
7
PTBOVF
Profiling Trace Buffer Overflow Flag Indicates the occurrence of a trace buffer overflow event during a
profiling session.
0 No trace buffer overflow event
1 Trace buffer overflow event
6
TRIGF
TRIG Flag — Indicates the occurrence of a TRIG event during the debug session.
0 No TRIG event
1 TRIG event
Table 6-21. DBGSCR3 Field Descriptions (continued)
Field Description
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6.3.2.11 Debug Status Register (DBGSR)
Read: Anytime.
Write: Never.
4
EEVF
External Event Flag — Indicates the occurrence of an external event during the debug session.
0 No external event
1 External event
3–0
ME[3:0]
Match Event[3:0]— Indicates a comparator match event on the corresponding comparator channel.
Address: 0x010B
76543210
R TBF 0 0 PTACT 0 SSF2 SSF1 SSF0
W
Reset
POR
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 6-13. Debug Status Register (DBGSR)
Table 6-24. DBGSR Field Descriptions
Field Description
7
TBF
Trace Buffer Full — The TBF bit indicates that the trace buffer has been filled with data since it was last armed.
If this bit is set, then all trace buffer lines contain valid data, regardless of the value of DBGCNT bits CNT[6:0].
The TBF bit is cleared when ARM in DBGC1 is written to a one. The TBF is cleared by the power on reset
initialization. Other system generated resets have no affect on this bit
4
PTACT
Profiling Transmission Active — The PTACT bit, when set, indicates that the profiling transmission is still
active. When clear, PTACT then profiling transmission is not active. The PTACT bit is set when profiling begins
with the first PTS format entry to the trace buffer. The PTACT bit is cleared when the profiling transmission ends.
2–0
SSF[2:0]
State Sequencer Flag Bits The SSF bits indicate the current State Sequencer state. During a debug session
on each transition to a new state these bits are updated. If the debug session is ended by software clearing the
ARM bit, then these bits retain their value to reflect the last state of the state sequencer before disarming. If a
debug session is ended by an internal event, then the state sequencer returns to State0 and these bits are
cleared to indicate that State0 was entered during the session. On arming the module the state sequencer enters
State1 and these bits are forced to SSF[2:0] = 001. See Table 6-25.
Table 6-25. SSF[2:0] — State Sequence Flag Bit Encoding
SSF[2:0] Current State
000 State0 (disarmed)
001 State1
010 State2
011 State3
100 Final State
Table 6-23. DBGEFR Field Descriptions
Field Description
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6.3.2.12 Debug Comparator A Control Register (DBGACTL)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
Table 6-27 shows the effect for RWE and RW on the comparison conditions. These bits are ignored if
INST is set, because matches based on opcodes reaching the execution stage are data independent.
101,110,111 Reserved
Address: 0x0110
76543210
R0 NDB INST 0RW RWE reserved COMPE
W
Reset00000000
= Unimplemented or Reserved
Figure 6-14. Debug Comparator A Control Register
Table 6-26. DBGACTL Field Descriptions
Field Description
6
NDB
Not Data Bus The NDB bit controls whether the match occurs when the data bus matches the comparator
register value or when the data bus differs from the register value. This bit is ignored if the INST bit in the
same register is set.
0 Match on data bus equivalence to comparator register contents
1 Match on data bus difference to comparator register contents
5
INST
Instruction Select — This bit configures the comparator to compare PC or data access addresses.
0 Comparator compares addresses of data accesses
1 Comparator compares PC address
3
RW
Read/Write Comparator Value Bit — The RW bit controls whether read or write is used in compare for the
associated comparator. The RW bit is ignored if RWE is clear or INST is set.
0 Write cycle is matched
1 Read cycle is matched
2
RWE
Read/Write Enable Bit — The RWE bit controls whether read or write comparison is enabled for the
associated comparator. This bit is ignored when INST is set.
0 Read/Write is not used in comparison
1 Read/Write is used in comparison
0
COMPE
Enable Bit — Determines if comparator is enabled
0 The comparator is not enabled
1 The comparator is enabled
Table 6-25. SSF[2:0] — State Sequence Flag Bit Encoding
SSF[2:0] Current State
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6.3.2.13 Debug Comparator A Address Register (DBGAAH, DBGAAM, DBGAAL)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
Table 6-27. Read or Write Comparison Logic Table
RWE Bit RW Bit RW Signal Comment
0 x 0 RW not used in comparison
0 x 1 RW not used in comparison
1 0 0 Write match
10 1 No match
11 0 No match
1 1 1 Read match
Address: 0x0115, DBGAAH
2 3 22 21 20 19 18 17 16
RDBGAA[23:16]
W
Reset00000000
Address: 0x0116, DBGAAM
1 5 14 13 12 11 10 9 8
RDBGAA[15:8]
W
Reset00000000
Address: 0x0117, DBGAAL
76543210
RDBGAA[7:0]
W
Reset00000000
Figure 6-15. Debug Comparator A Address Register
Table 6-28. DBGAAH, DBGAAM, DBGAAL Field Descriptions
Field Description
23–16
DBGAA
[23:16]
Comparator Address Bits [23:16]— These comparator address bits control whether the comparator compares
the address bus bits [23:16] to a logic one or logic zero.
0 Compare corresponding address bit to a logic zero
1 Compare corresponding address bit to a logic one
15–0
DBGAA
[15:0]
Comparator Address Bits [15:0]— These comparator address bits control whether the comparator compares
the address bus bits [15:0] to a logic one or logic zero.
0 Compare corresponding address bit to a logic zero
1 Compare corresponding address bit to a logic one
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6.3.2.14 Debug Comparator A Data Register (DBGAD)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
This register can be accessed with a byte resolution, whereby DBGAD0, DBGAD1, DBGAD2, DBGAD3
map to DBGAD[31:0] respectively.
6.3.2.15 Debug Comparator A Data Mask Register (DBGADM)
Read: Anytime.
Address: 0x0118, 0x0119, 0x011A, 0x011B
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RBit 31 Bit 30 Bit 29 Bit 28 Bit 27 Bit 26 Bit 25 Bit 24 Bit 23 Bit 22 Bit 21 Bit 20 Bit 19 Bit 18 Bit 17 Bit 16
W
Reset0000000000000000
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
Reset0000000000000000
Figure 6-16. Debug Comparator A Data Register (DBGAD)
Table 6-29. DBGAD Field Descriptions
Field Description
31–16
Bits[31:16]
(DBGAD0,
DBGAD1)
Comparator Data Bits — These bits control whether the comparator compares the data bus bits to a logic one
or logic zero. The comparator data bits are only used in comparison if the corresponding data mask bit is logic 1.
0 Compare corresponding data bit to a logic zero
1 Compare corresponding data bit to a logic one
15–0
Bits[15:0]
(DBGAD2,
DBGAD3)
Comparator Data Bits — These bits control whether the comparator compares the data bus bits to a logic one
or logic zero. The comparator data bits are only used in comparison if the corresponding data mask bit is logic 1.
0 Compare corresponding data bit to a logic zero
1 Compare corresponding data bit to a logic one
Address: 0x011C, 0x011D, 0x011E, 0x011F
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RBit 31 Bit 30 Bit 29 Bit 28 Bit 27 Bit 26 Bit 25 Bit 24 Bit 23 Bit 22 Bit 21 Bit 20 Bit 19 Bit 18 Bit 17 Bit 16
W
Reset0000000000000000
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
Reset0000000000000000
Figure 6-17. Debug Comparator A Data Mask Register (DBGADM)
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Write: If DBG not armed and PTACT is clear.
This register can be accessed with a byte resolution, whereby DBGADM0, DBGADM1, DBGADM2,
DBGADM3 map to DBGADM[31:0] respectively.
6.3.2.16 Debug Comparator B Control Register (DBGBCTL)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
Table 6-30. DBGADM Field Descriptions
Field Description
31–16
Bits[31:16]
(DBGADM0,
DBGADM1)
Comparator Data Mask Bits — These bits control whether the comparator compares the data bus bits to the
corresponding comparator data compare bits.
0 Do not compare corresponding data bit
1 Compare corresponding data bit
15-0
Bits[15:0]
(DBGADM2,
DBGADM3)
Comparator Data Mask Bits — These bits control whether the comparator compares the data bus bits to the
corresponding comparator data compare bits.
0 Do not compare corresponding data bit
1 Compare corresponding data bit
Address: 0x0120
76543210
R0 0 INST 0RW RWE reserved COMPE
W
Reset00000000
= Unimplemented or Reserved
Figure 6-18. Debug Comparator B Control Register
Table 6-31. DBGBCTL Field Descriptions
Field(1)
1. If the ABCM field selects range mode comparisons, then DBGACTL bits configure the comparison, DBGBCTL is ignored.
Description
5
INST
Instruction Select — This bit configures the comparator to compare PC or data access addresses.
0 Comparator compares addresses of data accesses
1 Comparator compares PC address
3
RW
Read/Write Comparator Value Bit — The RW bit controls whether read or write is used in compare for the
associated comparator. The RW bit is ignored if RWE is clear or INST is set.
0 Write cycle is matched
1 Read cycle is matched
2
RWE
Read/Write Enable Bit — The RWE bit controls whether read or write comparison is enabled for the
associated comparator. This bit is ignored when INST is set.
0 Read/Write is not used in comparison
1 Read/Write is used in comparison
0
COMPE
Enable Bit — Determines if comparator is enabled
0 The comparator is not enabled
1 The comparator is enabled
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Table 6-32 shows the effect for RWE and RW on the comparison conditions. These bits are ignored if
INST is set, as matches based on instructions reaching the execution stage are data independent.
6.3.2.17 Debug Comparator B Address Register (DBGBAH, DBGBAM, DBGBAL)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
Table 6-32. Read or Write Comparison Logic Table
RWE Bit RW Bit RW Signal Comment
0 x 0 RW not used in comparison
0 x 1 RW not used in comparison
1 0 0 Write match
10 1 No match
11 0 No match
1 1 1 Read match
Address: 0x0125, DBGBAH
2 3 22 21 20 19 18 17 16
RDBGBA[23:16]
W
Reset00000000
Address: 0x0126, DBGBAM
1 5 14 13 12 11 10 9 8
RDBGBA[15:8]
W
Reset00000000
Address: 0x0127, DBGBAL
76543210
RDBGBA[7:0]
W
Reset00000000
Figure 6-19. Debug Comparator B Address Register
Table 6-33. DBGBAH, DBGBAM, DBGBAL Field Descriptions
Field Description
23–16
DBGBA
[23:16]
Comparator Address Bits [23:16]— These comparator address bits control whether the comparator compares
the address bus bits [23:16] to a logic one or logic zero.
0 Compare corresponding address bit to a logic zero
1 Compare corresponding address bit to a logic one
15–0
DBGBA
[15:0]
Comparator Address Bits[15:0]— These comparator address bits control whether the comparator compares
the address bus bits [15:0] to a logic one or logic zero.
0 Compare corresponding address bit to a logic zero
1 Compare corresponding address bit to a logic one
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6.3.2.18 Debug Comparator C Control Register (DBGCCTL)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
Table 6-35 shows the effect for RWE and RW on the comparison conditions. These bits are ignored if
INST is set, because matches based on opcodes reaching the execution stage are data independent.
Address: 0x0130
76543210
R0 NDB INST 0RW RWE reserved COMPE
W
Reset00000000
= Unimplemented or Reserved
Figure 6-20. Debug Comparator C Control Register
Table 6-34. DBGCCTL Field Descriptions
Field Description
6
NDB
Not Data Bus The NDB bit controls whether the match occurs when the data bus matches the comparator
register value or when the data bus differs from the register value. This bit is ignored if the INST bit in the
same register is set.
0 Match on data bus equivalence to comparator register contents
1 Match on data bus difference to comparator register contents
5
INST
Instruction Select — This bit configures the comparator to compare PC or data access addresses.
0 Comparator compares addresses of data accesses
1 Comparator compares PC address
3
RW
Read/Write Comparator Value Bit — The RW bit controls whether read or write is used in compare for the
associated comparator. The RW bit is ignored if RWE is clear or INST is set.
0 Write cycle is matched
1 Read cycle is matched
2
RWE
Read/Write Enable Bit — The RWE bit controls whether read or write comparison is enabled for the
associated comparator. This bit is not used if INST is set.
0 Read/Write is not used in comparison
1 Read/Write is used in comparison
0
COMPE
Enable Bit — Determines if comparator is enabled
0 The comparator is not enabled
1 The comparator is enabled
Table 6-35. Read or Write Comparison Logic Table
RWE Bit RW Bit RW Signal Comment
0 x 0 RW not used in comparison
0 x 1 RW not used in comparison
1 0 0 Write match
10 1 No match
11 0 No match
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6.3.2.19 Debug Comparator C Address Register (DBGCAH, DBGCAM, DBGCAL)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
1 1 1 Read match
Address: 0x0135, DBGCAH
2 3 22 21 20 19 18 17 16
RDBGCA[23:16]
W
Reset00000000
Address: 0x0136, DBGCAM
1 5 14 13 12 11 10 9 8
RDBGCA[15:8]
W
Reset00000000
Address: 0x0137, DBGCAL
76543210
RDBGCA[7:0]
W
Reset00000000
Figure 6-21. Debug Comparator C Address Register
Table 6-36. DBGCAH, DBGCAM, DBGCAL Field Descriptions
Field Description
23–16
DBGCA
[23:16]
Comparator Address Bits [23:16]— These comparator address bits control whether the comparator compares
the address bus bits [23:16] to a logic one or logic zero.
0 Compare corresponding address bit to a logic zero
1 Compare corresponding address bit to a logic one
15–0
DBGCA
[15:0]
Comparator Address Bits[15:0]— These comparator address bits control whether the comparator compares
the address bus bits [15:0] to a logic one or logic zero.
0 Compare corresponding address bit to a logic zero
1 Compare corresponding address bit to a logic one
Table 6-35. Read or Write Comparison Logic Table
RWE Bit RW Bit RW Signal Comment
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6.3.2.20 Debug Comparator C Data Register (DBGCD)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
This register can be accessed with a byte resolution, whereby DBGCD0, DBGCD1, DBGCD2, DBGCD3
map to DBGCD[31:0] respectively.
XGATE data accesses have a maximum width of 16-bits and are mapped to DBGCD[15:0].
6.3.2.21 Debug Comparator C Data Mask Register (DBGCDM)
Read: Anytime.
Address: 0x0138, 0x0139, 0x013A, 0x013B
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RBit 31 Bit 30 Bit 29 Bit 28 Bit 27 Bit 26 Bit 25 Bit 24 Bit 23 Bit 22 Bit 21 Bit 20 Bit 19 Bit 18 Bit 17 Bit 16
W
Reset0000000000000000
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
Reset0000000000000000
Figure 6-22. Debug Comparator C Data Register (DBGCD)
Table 6-37. DBGCD Field Descriptions
Field Description
31–16
Bits[31:16]
(DBGCD0,
DBGCD1)
Comparator Data Bits — These bits control whether the comparator compares the data bus bits to a logic one
or logic zero. The comparator data bits are only used in comparison if the corresponding data mask bit is logic 1.
0 Compare corresponding data bit to a logic zero
1 Compare corresponding data bit to a logic one
15–0
Bits[15:0]
(DBGCD2,
DBGCD3)
Comparator Data Bits — These bits control whether the comparator compares the data bus bits to a logic one
or logic zero. The comparator data bits are only used in comparison if the corresponding data mask bit is logic 1.
0 Compare corresponding data bit to a logic zero
1 Compare corresponding data bit to a logic one
Address: 0x013C, 0x013D, 0x013E, 0x013F
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RBit 31 Bit 30 Bit 29 Bit 28 Bit 27 Bit 26 Bit 25 Bit 24 Bit 23 Bit 22 Bit 21 Bit 20 Bit 19 Bit 18 Bit 17 Bit 16
W
Reset0000000000000000
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
Reset0000000000000000
Figure 6-23. Debug Comparator C Data Mask Register (DBGCDM)
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Write: If DBG not armed and PTACT is clear.
This register can be accessed with a byte resolution, whereby DBGCDM0, DBGCDM1, DBGCDM2,
DBGCDM3 map to DBGCDM[31:0] respectively.
XGATE data accesses have a maximum width of 16-bits and are mapped to DBGCDM[15:0].
6.3.2.22 Debug Comparator D Control Register (DBGDCTL)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
Table 6-38. DBGCDM Field Descriptions
Field Description
31–16
Bits[31:16]
(DBGCDM0,
DBGCDM1)
Comparator Data Mask Bits — These bits control whether the comparator compares the data bus bits to the
corresponding comparator data compare bits.
0 Do not compare corresponding data bit
1 Compare corresponding data bit
15–0
Bits[15:0]
(DBGCDM2,
DBGCDM3)
Comparator Data Mask Bits — These bits control whether the comparator compares the data bus bits to the
corresponding comparator data compare bits.
0 Do not compare corresponding data bit
1 Compare corresponding data bit
Address: 0x0140
76543210
R0 0 INST 0RW RWE reserved COMPE
W
Reset00000000
= Unimplemented or Reserved
Figure 6-24. Debug Comparator D Control Register
Table 6-39. DBGDCTL Field Descriptions
Field(1) Description
5
INST
Instruction Select — This bit configures the comparator to compare PC or data access addresses.
0 Comparator compares addresses of data accesses
1 Comparator compares PC address
3
RW
Read/Write Comparator Value Bit — The RW bit controls whether read or write is used in compare for the
associated comparator. The RW bit is ignored if RWE is clear or INST is set.
0 Write cycle is matched
1 Read cycle is matched
2
RWE
Read/Write Enable Bit — The RWE bit controls whether read or write comparison is enabled for the
associated comparator. This bit is ignored if INST is set.
0 Read/Write is not used in comparison
1 Read/Write is used in comparison
0
COMPE
Enable Bit — Determines if comparator is enabled
0 The comparator is not enabled
1 The comparator is enabled
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Table 6-40 shows the effect for RWE and RW on the comparison conditions. These bits are ignored if
INST is set, because matches based on opcodes reaching the execution stage are data independent.
6.3.2.23 Debug Comparator D Address Register (DBGDAH, DBGDAM, DBGDAL)
Read: Anytime.
Write: If DBG not armed and PTACT is clear.
1. If the CDCM field selects range mode comparisons, then DBGCCTL bits configure the comparison, DBGDCTL is ignored.
Table 6-40. Read or Write Comparison Logic Table
RWE Bit RW Bit RW Signal Comment
0 x 0 RW not used in comparison
0 x 1 RW not used in comparison
1 0 0 Write match
10 1 No match
11 0 No match
1 1 1 Read match
Address: 0x0145, DBGDAH
2 3 22 21 20 19 18 17 16
RDBGDA[23:16]
W
Reset00000000
Address: 0x0146, DBGDAM
1 5 14 13 12 11 10 9 8
RDBGDA[15:8]
W
Reset00000000
Address: 0x0147, DBGDAL
76543210
RDBGDA[7:0]
W
Reset00000000
Figure 6-25. Debug Comparator D Address Register
Table 6-41. DBGDAH, DBGDAM, DBGDAL Field Descriptions
Field Description
23–16
DBGDA
[23:16]
Comparator Address Bits [23:16]— These comparator address bits control whether the comparator compares
the address bus bits [23:16] to a logic one or logic zero.
0 Compare corresponding address bit to a logic zero
1 Compare corresponding address bit to a logic one
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6.4 Functional Description
This section provides a complete functional description of the DBG module.
6.4.1 DBG Operation
The DBG module operation is enabled by setting ARM in DBGC1. When armed it supports storing of data
in the trace buffer and can be used to generate breakpoints to the CPU. The DBG module is made up of
comparators, control logic, the trace buffer, and the state sequencer , Figure 6-1.
The comparators monitor the bus activity of the CPU. Comparators can be configured to monitor opcode
addresses (effectively the PC address) or data accesses. Comparators can be configured during data
accesses to mask out individual data bus bits and to use R/W access qualification in the comparison.
Comparators can be configured to monitor a range of addresses.
When configured for data access comparisons, the match is generated if the a ddress (and optionally data)
of a data access matches the comparator value.
Configured for monitoring opcode addresses, the match is generated when the associated opcode reaches
the execution stage of the instruction queue, but before execution of that opcode.
When a match with a comparator register value occurs, the associated control logic can force the state
sequencer to another state (see Figure 6-26).
The state sequencer can transition freely between the states 1, 2 and 3. On transition to Final State bus
tracing can be triggered. On completion of tracing the state sequencer enters State0. If tracing is disabled
or End aligned tracing is enabled then the state sequencer transitions immediately from Final State to
State0. The transition to State0 generates breakpoints if breakpoints are enabled.
Independent of the comparators, state sequencer transitions can be forced by the external event input or by
writing to the TRIG bit in the DBGC1 control register.
The trace buffer is visible through a 2- byte window in the register address map and can be read out using
standard 16-bit word reads.
6.4.2 Comparator Modes
The DBG contains four comparators, A, B, C, and D. Each comparator compares the address stored in
DBGXAH, DBGXAM, and DBGXAL with the PC (opcode addresses) or selected address bus (data
15–0
DBGDA
[15:0]
Comparator Address Bits[15:0]— These comparator address bits control whether the comparator compares
the address bus bits [15:0] to a logic one or logic zero.
0 Compare corresponding address bit to a logic zero
1 Compare corresponding address bit to a logic one
Table 6-41. DBGDAH, DBGDAM, DBGDAL Field Descriptions
Field Description
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accesses). Furthermore, comparators A and C can compare the data buses to values stored in DBGXD3-0
and allow data bit masking.
The comparators can monitor the buses for an exact address or an address range. The comparator
configuration is controlled by the control register contents and the range control by the DBGC2 contents.
The comparator control register also allows the type of data access to be included in the comparison
through the use of the RWE and RW bits. The RWE bit controls whether the access type is compared for
the associated comparator and the RW bit selects either a read or write access for a valid match.
The INST bit in each comparator control register is used to determine the matching condition. By setting
INST, the comparator matches opcode addresses, whereby the databus, data mask, RW and RWE bits are
ignored. The comparator register must be loaded with the exact opcode address.
The comparator can be configured to match memory access addresses by clearing the INST bit.
Each comparator match can force a transition to another state sequencer state (see Section 6.4.3”).
Once a successful comparator match has occurred, the condition that caused the original match is not
verified again on subsequent matches. Thus if a particular data value is matched at a given address, this
address may not contain that data value when a subsequent match occurs.
Comparators C and D can also be used to select an address range to trace from, when tracing CPU accesses
in Detail mode. This is determined by the TRANGE bits in the DBGTCRH register. The TRANGE
encoding is shown in Table 6-10. If the TRANGE bits select a range definition using comparator D and
the COMPE bit is clear , then comparator D is configured for trace range definition. By setting the COMPE
bit the comparator is configured for address bus comparisons, the TRANGE bits are ignored and the
tracing range function is disabled. Similarly if the TRANGE bits select a range definition using comparator
C and the COMPE bit is clear, then comparator C is configured for trace range definition.
Match[0, 1, 2, 3] map directly to Comparators [A, B, C, D] respectively, except in range modes (see
Section 6.3.2.2”). Comparator priority rules are describe d in the event prior ity sec tion (Section 6.4.3.5”).
6.4.2.1 Exact Address Comparator Match
With range comparisons disabled, the match condition is an exact equivalence of address bus with the
value stored in the comparator address registers. Qualification of the type of access (R/W) is also possible.
Code may contain various access forms of the same address, for example a 1 6-bit acces s of ADDR[n] or
byte access of ADDR[n+1] both access n+1. The comparators ensure that any access of the address defined
by the comparator address register generates a match, as shown in the example of Table 6-42. Thus if the
comparator address register contains ADDR[n+1] any access of ADDR[n+1] matches . This means that a
16-bit access of ADDR[n] or 32-bit access of ADDR[n-1] also match because they also access
ADDR[n+1]. The right hand columns show the contents of DBGxA that would match for each access.
Table 6-42. Comparator Address Bus Matches
Access Address ADDR[n] ADDR[n+1] ADDR[n+2] ADDR[n+3]
32-bit ADDR[n] Match Match Match Match
16-bit ADDR[n] Match Match No Match No Match
16-bit ADDR[n+1] No Match Match Match No Match
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If the comparator INST bit is set, the comparator address register contents are compared with the PC, the
data register contents and access type bits are ignored. The comparator address register must be loaded
with the address of the first opcode byte.
6.4.2.2 Address and Data Comparator Match
Comparators A and C feature data comparators, for data access comparisons. The comparators do not
evaluate if accessed data is valid. Accesses across aligned 32-bit boundaries are split internally into
consecutive accesses. The data comparator mapping to accessed addresses for the CPU is shown in
Table 6-43, whereby the Address column refers to the lowest 2 bits of the lowest accessed address. This
corresponds to the most significant data byte.
The fixed mapping of data comparator bytes to addresses within a 32-bit data field ensures data matches
independent of access size. To compare a single data byte within the 32-bit field, the other bytes within
that field must be masked using the corresponding data mask registers. This ensures that any access of that
byte (32-bit,16-bit or 8-bit) with matching data causes a match. If no bytes are masked then the data
comparator always compares all 32-bits and can only generate a ma tch on a 32-bit access with correct 32-
bit data value. In this case, 8-bit or 16-bit accesses within the 32-bit fi eld cannot generate a match even if
the contents of the addressed bytes match because all 32-bits must match. In Table 6-44 the Access
Address column refers to the address bits[1:0] of the lowest accessed address (m ost significant data byte).
Table 6-44. Data Register Use Dependency On CPU Access Type
8-bit ADDR[n] Match No Match No Match No Match
Table 6-43. Comparator Data Byte Alignment
Address[1:0] Data Comparator
00 DBGxD0
01 DBGxD1
10 DBGxD2
11 DBGxD3
Memory Address[2:0]
Case Access
Address
Access
Size 000 001 010 011 100 101 110
1 00 32-bit D BGxD0 DBGxD1 DBGxD2 DBGxD3
2 01 32-bit DBGxD1 DBGxD2 DBGxD3 DBGxD0
3 10 32-bit DBGxD2 DBGxD3 DBGxD0 DBGxD1
4 11 32-bit DBGxD3 DBGxD0 DBGxD1 DBGxD2
5 00 16-bit D BGxD0 DBGxD1
6 01 16-bit DBGxD1 DBGxD2
7 10 16-bit DBGxD2 DBGxD3
8 11 16-bit DBGxD3 DBGxD0
Table 6-42. Comparator Address Bus Matches
Access Address ADDR[n] ADDR[n+1] ADDR[n+2] ADDR[n+3]
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For a match of a 32-bit access with data compare, th e address comparator must be loaded with the address
of the lowest accessed byte. For Case1 Table 6-44 this corresponds to 000, for Case2 it corresponds to 001.
To compare all 32-bits, it is required that no bits are masked.
6.4.2.3 Data Bus Comparison NDB Dependency
The NDB control bit allows data bus comparators to be configured to either match on equivalence or on
difference. This allows monitoring of a difference in the contents of an address location from an ex pected
value.
When matching on an equivalence (NDB=0), each individual data bus bit position can be masked out by
clearing the corresponding mask bit, so that it is ignored in the comparison. A match occurs when all data
bus bits with corresponding mask bits set are equivalent. If all mask register bits are clear , then a match is
based on the address bus only, the data bus is ignored.
When matching on a difference, mask bits can be cleared to ignore bit positions. A match occurs when any
data bus bit with corresponding mask bit set is different. Clearing all mask bits, causes all bits to be ignored
and prevents a match because no difference can be detected. In this case address bus equivalence does not
cause a match. Bytes that are not accessed are ignored. Thus when monitoring a multi byte field for a
difference, partial accesses of the field only return a match if a dif ference is detected in the accessed bytes.
6.4.2.4 Range Comparisons
Range comparisons are accurate to byte boundaries. Thus for data access comparisons a match occurs if
at least one byte of the access is in the range (inside range) or outside the range (outside range). For opcode
comparisons only the address of the first opcode byte is compared with the range.
9 00 8-bit D BGxD0
10 01 8-bit DBGxD1
11 10 8-bit DBGxD2
12 11 8-bit DBGxD3
13 00 8-bit DBGxD0
Denotes byte that is not accessed.
Table 6-45. NDB and MASK bit dependency
NDB DBGADM Comment
0 0 Do not compare data bus bit.
0 1 Compare data bus bit. Match on equivalence.
1 0 Do not compare data bus bit.
1 1 Compare data bus bit. Match on difference.
Memory Address[2:0]
Case Access
Address
Access
Size 000 001 010 011 100 101 110
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When using the AB comparator pair for a range comparison, the data bus can be used for qualification by
using the comparator A data and data mask registers. Simila rly when using the CD comparator pair for a
range comparison, the data bus can be used for qualification by using the comparator C data and data mask
registers. The DBGACTL/DBGCCTL RW and R WE bits can be used to qualify the range comparison on
either a read or a write access. The corresponding DBGBCTL/DBGDCTL bits are ignored. The
DBGACTL/DBGCCTL COMPE/INST bits are used for range comparisons. The DBGBCTL/DBGDCTL
COMPE/INST bits are ignored in range modes.
6.4.2.4.1 Inside Range (CompAC_Addr address CompBD_Addr)
In the Inside Range comparator mode, either comparator pair A and B or comparator pair C and D can be
configured for range comparisons by the control register (DBGC2). The match condition requires a
simultaneous valid match for both comparators. A match condition on only one comparator is not valid.
6.4.2.4.2 Outside Range (address < CompAC_Addr or address > CompBD_Addr)
In the Outside Range comparator mode, either comparator pair A and B or comparator pair C and D can
be configured for range comparisons. A single match condition on either of the comparators is recognized
as valid. Outside range mode in combination with opcode address matches can be used to detect if opcodes
are from an unexpected range.
NOTE
When configured for data access matches, an outside range match would
typically occur at any interrupt vector fetch or register access. This can be
avoided by setting the upper or lower range limit to $FFFFFF or $000000
respectively. Interrupt vector fetches do not cause opcode address matches.
6.4.3 Events
Events are used as qualifiers for a state sequencer change of state. Th e state control register for the current
state determines the next state for each event. An event can immediately initiate a transition to the next
state sequencer state whereby the corresponding flag in DBGSR is set.
6.4.3.1 Comparator Match Events
6.4.3.1.1 Opcode Address Comparator Match
The comparator is loaded with the address of the selected instruction and the comparator control register
INST bit is set. When the opcode reaches the execution stage of the instruction queue a match occurs just
before the instruction executes, allowing a breakpoint immediately before the instruction boundary. The
comparator address register must contain the address of the first opc ode byte for the match to occur.
Opcode address matches are data independent thus the RWE and R W bits are ignored. CPU compares are
disabled when BDM becomes active.
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6.4.3.1.2 Data Access Comparator Match
Data access matches are generated when an access occurs at the address contained in the comparator
address register. The match can be qualified by the access data and by the access type (read/write). The
breakpoint occurs a maximum of 2 instructions after the access in the CPU flow. Note, if a COF occurs
between access and breakpoint, the opcode address of the breakpoint can be elsewhere in the memory map.
Opcode fetches are not classed as data accesses. Thus data access matches are not possible on opcode
fetches.
6.4.3.2 External Event
The DBGEEV input signal can force a state sequencer transition, independent of internal comparator
matches. The DBGEEV is an input signal mapped directly to a device pin and configured by the EEVE
field in DBGC1. The external events can change the state sequencer state, or force a trace buf fer entry, or
gate trace buffer entries.
If configured to change the state sequencer state, then the external match is mapped to DBGSCRx bits
C3SC[1:0]. In this configuration, internal comparator channel3 is de-coupled from the state sequencer but
can still be used for timestamps. The DBGEFR bit EEVF is set when an external event occurs.
6.4.3.3 Setting The TRIG Bit
Independent of comparator matches it is possible to initiate a tracing session and/or breakpoint by writing
the TRIG bit in DBGC1 to a logic “1”. This forces the state sequencer into the Final S tate. If configured
for End aligned tracing or for no tracing, the transition to Final State is followed immediately by a
transition to S tate0. If configured for Begin- or Mid Aligned tracing, the state sequencer remains in Final
State until tracing is complete, then it transitions to State0.
Breakpoints, if enabled, are issued on the transition to State0.
6.4.3.4 Profiling Trace Buffer Overflow Event
During code profiling a trace buffer overflow forces the state sequencer into the disarmed State0 and, if
breakpoints are enabled, issues a breakpoint request to the CPU.
6.4.3.5 Event Priorities
If simultaneous events occur, the priority is resolved according to Table 6-46. Lower priority events are
suppressed. It is thus possible to miss a lower priority event if it occurs simultaneously with an event of a
higher priority. The event priorities dictate that in the case of simultaneous matches, the match on the
higher comparator channel number (3,2,1,0) has priority.
If a write access to DBGC1 with the ARM bit position set occurs simultaneously to a hardware disarm
from an internal event, then the ARM bit is cleared due to the hardware disarm.
Table 6-46. Event Priorities
Priority Source Action
Highest TB Overflow Immediate force to state 0, generate breakpoint and terminate tracing
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6.4.4 State Sequence Control
Figure 6-26. State Sequencer Diagram
The state sequencer allows a defined sequence of events to provide a breakpoint and/or a trigger point for
tracing of data in the trace buffer. When the DBG module is armed by setting the ARM bit in the DBGC1
register , the state sequencer enters S tate1. Further transitions between the states are controlled by the state
control registers and depend upon event occurrences (see Section 6.4.3). From Final State the only
permitted transition is back to the disarmed State0. Transition between the states 1 to 3 is not restricted.
Each transition updates the SSF[2:0] flags in DBGSR accordingly to indicate the current state. If
breakpoints are enabled, then an event based transition to State0 generates the breakpoint request. A
transition to State0 resulting from writing “0” to the ARM bit does not generate a breakpoint request.
6.4.4.1 Final State
On entering Final State a trigger may be issued to th e trace buffer according to the trigger position control
as defined by the TALIGN field (see Section 6.3.2.3”).
If tracing is enabled and either Begin or Mid aligned triggering is selected, the state sequencer remains in
Final State until completion of the trace. On completion of the trace the state sequencer returns to State0
and the debug module is disarmed; if breakpoints are enabled, a breakpoint request is generated.
If tracing is disabled or End aligned triggering is selected, then when the Final State is reached the state
sequencer returns to State0 immediately and the debug module is disarmed. If breakpoints are enabled, a
breakpoint request is generated on transitions to State0.
TRIG Force immediately to final state
DBGEEV Force to next state as defined by state control registers (EEVE=2’b10)
Match3 Force to next state as defined by state control registers
Match2 Force to next state as defined by state control registers
Match1 Force to next state as defined by state control registers
Lowest Match0 Force to next state as defined by state control registers
Table 6-46. Event Priorities
State1
Final State State3
ARM = 1
State2
State 0
(Disarmed)
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6.4.5 Trace Buffer Operation
The trace buffer is a 64 lines deep by 64-bits wide RAM array . If the TSOURCE bit is set the DBG module
can store trace information in the RAM array in a circ ular buffer format. Data is stored in mode dependent
formats, as described in the following sections. After each trace buffer entry, the counter register
DBGCNT is incremented. Trace buffer rollover is possible when configured for End- or Mid-Aligned
tracing, such that older entries are replaced by newer entries. T racing of CPU activity is disabled when the
BDC is active.
The RAM array can be accessed through the regis ter DBGTB using 16-bit wide word accesses. After each
read, the internal RAM pointer is incremented so that the next read will receive fresh information. Reading
the trace buffer whilst the DBG is armed returns invalid data and the trace buffer pointer is not
incremented.
In Detail mode the address range for CPU access tracing can be limited to a range specified by the
TRANGE bits in DBGTCRH. This function uses comparators C and D to define an address range inside
which accesses should be traced. Thus traced accesses can be restricted, for example, to particular register
or RAM range accesses.
The external event pin can be configured to force trace buffer entries in Normal or Loop1 trace modes. All
tracing modes support trace buffer gating. In Pure PC and Detail modes external events do not force trace
buffer entries.
If the external event pin is configured to gate trace buffer entries then any trace mode is valid.
6.4.5.1 Trace Trigger Alignment
Using the TALIGN bits (see Section 6.3.2.3”) it is possible to align the trigger with the end, the middle, or
the beginning of a tracing session.
If End or Mid-Alignment is selected, tracing begins when the ARM bit in DBGC1 is set and State1 is
entered. The transition to Final State if End-Alignment is selected, ends the tracing session. The transition
to Final State if Mid-Alignment is selected signals that another 32 lines are traced before ending the tracing
session. Tracing with Begin-Alignment starts at the trigger and ends when the trace buffer is full.
6.4.5.1.1 Storing with Begin-Alignment
S toring with Begin-Alignment, data is not stored in the trace buffer until the Final State is entered. Once
the trigger condition is met the DBG module remains armed until 64 lines are stored in the trace buffer.
Table 6-47. Tracing Alignment
TALIGN Tracing Begin Tracing End
00 On arming At trigger
01 At trigger When trace buffer is full
10 On arming When 32 trace buffer lines have
been filled after trigger
11 Reserved
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Using Begin-Alignment together with opcode address comparisons, if the instruction is about to be
executed then the trace is started. If the trigger is at the address of a COF instruction, whilst tracing COF
addresses, then that COF address is stored to the trace buffer. If breakpoints are enabled, the breakpoint is
generated upon entry into S tate0 on completion of the tracing session; thus the breakpoint does not occur
at the instruction boundary.
6.4.5.1.2 Storing with Mid-Alignment
Storing with Mid-Alignment, data is stored in the trace buffer as soon as the DBG module is armed. When
the trigger condition is met, another 32 lines are traced before ending the tracing session, irrespective of
the number of lines stored before the trigger occurred, then the DBG module is disarmed and no more data
is stored. Using Mid-Alignment with opcode address triggers, if the instruction is about to be executed then
the trace is continued for another 32 lines. If breakpoints are enabled, the breakpoint is generated upon
entry into State0 on completion of th e tracing session; thus the breakpoint does not occur at the instruction
boundary. When configured for Compressed Pure-PC tracing, the MAT info bit is set to indicate the last
PC entry before a trigger event.
6.4.5.1.3 Storing with End-Alignment
Storing with End-Alignment, data is stored in the trace buffer until the Final State is entered. Following
this trigger, the DBG module immediately transitions to State0. If the trigger is at the address of a COF
instruction the trigger event is not stored in the trace buffer.
6.4.5.2 Trace Modes
The DBG module can operate in four trace modes. The mode is selected using the TRCMOD bits in the
DBGTCRH register. Normal, Loop1 and Detail modes can be configured to store a timestamp with each
entry, by setting the STAMP bit. The modes are described in the following subsections.
In addition to the listed trace modes it is also possible to use code profiling to fill the trace buffer with a
highly compressed COF format. This can be subsequently read out in the same fashion as the listed trace
modes (see Section 6.4.6).
6.4.5.2.1 Normal Mode
In Normal Mode, change of flow (COF) program counter (PC) addresses are stored.
CPU COF addresses are defined as follows:
Source address of taken conditional branches (bit-conditional, and loop primitives)
Destination address of indexed JMP and JSR instruction.s
Destination address of RTI and RTS instructions.
Vector address of interrupts
BRA, BSR, BGND as well as non-indexed JMP and JSR instructions are not classified as change of flow
and are not stored in the trace buffer.
COF addresses stored include the full address bus of CPU and an information byte, which contains bits to
indicate whether the stored address was a source, destination or vector address.
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NOTE
When a CPU indexed jump instruction is executed, the destination address
is stored to the trace buffer on instruction completion, indicating the COF
has taken place. If an interrupt occurs simultaneously then the next
instruction carried out is actually from the interrupt service routine. The
instruction at the destination address of the original program flow gets
executed after the interrupt service routine.
In the following example an IRQ interrupt occurs during execution of the
indexed JMP at address MARK1. The NOP at the destination (SUB_1) is
not executed until after the IRQ service routine but the destination address
is entered into the trace buffer to indicate that the indexed JMP COF has
taken place.
LD X,#SUB_1
MARK1: JMP (0,X) ; IRQ interrupt occurs during execution of this
MARK2: NOP ;
SUB_1: NOP ; JMP Destination address TRACE BUFFER ENTRY 1
; RTI Destination address TRACE BUFFER ENTRY 3
NOP ;
ADDR1: DBNE D0,PART5 ; Source address TRACE BUFFER ENTRY 4
IRQ_ISR: LD D1,#$F0 ; IRQ Vector $FFF2 = TRACE BUFFER ENTRY 2
ST D1,VAR_C1
RTI ;
The execution flow taking into account the IRQ is as follows
LD X,#SUB_1
MARK1: JMP (0,X) ;
IRQ_ISR: LD D1,#$F0 ;
ST D1,VAR_C1
RTI ;
SUB_1: NOP
NOP ;
ADDR1: DBNE D0,PART5 ;
The Normal Mode trace buffer format is shown in the following tables. Whilst tracing in Normal or Loop1
modes each array line contains 2 data entries, thus in this case the DBGCNT[0] is incremented after each
separate entry. Information byte bits indicate if an entry is a source, destination or vector address.
The external event input can force trace buf fer entries independent of COF occurrences, in which case the
EEVI bit is set and the PC value of the last instruction is stored to the trace buffer. If the external event
coincides with a COF buffer entry a single entry is made with the EEVI bit set.
Normal mode profiling with timestamp is possible when tracing from a single source by setting the
STAMP bit in DBGTCRL. This results in a different format (see Table 6-49).
Table 6-48. Normal and Loop1 Mode Trace Buffer Format without Timestamp
Mode 8-Byte Wide Trace Buffer Line
76543210
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Table 6-49. Normal and Loop1 Mode Trace Buffer Format with Timestamp
CINF contains information relating to the CPU.
CPU Information Byte CINF For Normal And Loop1 Modes
CPU CINF1 CPCH1 CPCM1 CPCL1 CINF0 CPCH0 CPCM0 CPCL0
CINF3 CPCH3 CPCM3 CPCL3 CINF2 CPCH2 CPCM2 CPCL2
Mode 8-Byte Wide Trace Buffer Line
76543210
CPU Timestamp Timestamp Reserved Reserved CINF0 CPCH0 CPCM0 CPCL0
Timestamp Timestamp Reserved Reserved CINF1 CPCH1 CPCM1 CPCL1
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
CET 0 0 CTI EEVI 0 TOVF
Figure 6-27. CPU Information Byte CINF
Table 6-50. CINF Bit Descriptions
Field Description
7–6
CET
CPU Entry Type Field Indicates the type of stored address of the trace buffer entry as described in Table 6-51
3
CTI
Comparator Timestamp Indicator — This bit indicates if the trace buffer entry corresponds to a comparator
timestamp.
0 Trace buffer entry initiated by trace mode specification conditions or timestamp counter overflow
1 Trace buffer entry initiated by comparator D match
2
EEVI
External Event Indicator — This bit indicates if the trace buffer entry corresponds to an external event.
0 Trace buffer entry not initiated by an external event
1 Trace buffer entry initiated by an external event
0
TOVF
Timestamp Overflow Indicator — Indicates if the trace buffer entry corresponds to a timestamp overflow
0 Trace buffer entry not initiated by a timestamp overflow
1 Trace buffer entry initiated by a timestamp overflow
Table 6-51. CET Encoding
CET Entry Type Description
00 Non COF opcode address (entry forced by an external event)
01 Vector destination address
10 Source address of COF opcode
11 Destination address of COF opcode
Table 6-48. Normal and Loop1 Mode Trace Buffer Format without Timestamp
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6.4.5.2.2 Loop1 Mode
Loop1 Mode, similarly to Normal Mode also stores only COF address information to the trace buffer, it
however allows the filtering out of redundant information.
The intent of Loop1 Mode is to prevent the trace buffer from being filled entirely with duplicate
information from a looping construct such as delays using the DBNE instruction. The DBG monitors trace
buffer entries and prevents consecutive duplicate address entries resulting from repeated branches.
Loop1 Mode only inhibits consecutive duplicate source address entries that would typically be stored in
most tight looping constructs. It does not inhibit repeated entries of destination addresses or vector
addresses, since repeated entries of these could indicate a bug in application code that the DBG module is
designed to help find.
The trace buffer format for Loop1 Mode is the same as that of Normal Mode.
6.4.5.2.3 Detail Mode
When tracing CPU activity in Detail Mode, address and data of data and vector accesses are traced. The
information byte indicates the size of access and the type of access (read or write).
ADRH, ADRM, ADRL denote address high, middle and low byte respectively. The numerical suffix
indicates which tracing step. DBGCNT increments by 2 for each line completed.
If timestamps are enabled then each CPU entry can span 2 trace buffer lines, whereby the second line
includes the timestamp. If a valid PC occurs in the same cycle as the timestamp, it is also stored to the trace
buffer and the PC bit is set. The second line featuring the timestamp is on ly stored if no further data access
occurs in the following cycle. This is shown in Table 6-53, where data accesses 2 and 3 occur in
consecutive cycles, suppressing the entry2 timestamp. If 2 lines are used for an entry, then DBGCNT
increments by 4. A timestamp line is indicated by bit1 in the TSINF byte. The timestamp counter is only
reset each time a timestamp line entr y is made. It is not reset when the data and address trace buffer line
entry is made.
Table 6-52. Detail Mode Trace Buffer Format without Timestamp
Mode 8-Byte Wide Trace Buffer Line
76543210
CPU
Detail
CDATA31 CDATA21 CDATA11 CDATA01 CINF1 CADRH1 CADRM1 CADRL1
CDATA32 CDATA22 CDATA12 CDATA02 CINF2 CADRH2 CADRM2 CADRL2
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Detail Mode data entries store the bytes aligned to the address of the MSB accessed (Byte1 Table 6-54).
Thus accesses split across 32-bit boundaries are wrapped around.
Table 6-54. Detail Mode Data Byte Alignment
Information Bytes
When tracing in Detail Mode, CINF provides information about the type of CPU access being made.
Table 6-53. Detail Mode Trace Buffer Format with Timestamp
Mode 8-Byte Wide Trace Buffer Line
76543210
CPU
Detail
CDATA31 CDATA21 CDATA11 CDATA01 CINF1 CADRH1 CADRM1 CADRL1
Timestamp Timestamp Reserved Reserved TSINF1 CPCH1 CPCM1 CPCL1
CDATA32 CDATA22 CDATA12 CDATA02 CINF2 CADRH2 CADRM2 CADRL2
CDATA33 CDATA23 CDATA13 CDATA03 CINF3 CADRH3 CADRM3 CADRL3
Timestamp Timestamp Reserved Reserved TSINF3 CPCH3 CPCM3 CPCL3
Access
Address
Access
Size CDATA31 CDATA21 CDATA11 CDATA01
00 32-bit Byte1 Byte2 Byte3 Byte4
01 32-bit Byte4 Byte1 Byte2 Byte3
10 32-bit Byte3 Byte4 Byte1 Byte2
11 32-bit Byte2 Byte3 Byte4 Byte1
00 24-bit Byte1 Byte2 Byte3
01 24-bit Byte1 Byte2 Byte3
10 24-bit Byte3 Byte1 Byte2
11 24-bit Byte2 Byte3 Byte1
00 16-bit Byte1 Byte2
01 16-bit Byte1 Byte2
10 16-bit Byte1 Byte2
11 16-bit Byte2 Byte1
00 8-bit Byte 1
01 8-bit Byte1
10 8-bit Byte1
11 8-bit Byte1
Denotes byte that is not accessed.
BYTE Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
CINF CSZ CRW 0 0 0 0 0
TSINF 0 0 0 0 CTI PC 1 TOVF
Figure 6-28. Information Bytes CINF and XINF
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TSINF provides information about a timestamp. Bit1 indicates if the byte is a TSINF byte.
6.4.5.2.4 Pure PC Mode
In Pure PC Mode, the PC addresses of all opcodes loaded into the execution stage, including illegal
opcodes, are stored.
Tracing from a single source, compression is implemented to increase the effective trace depth. A
compressed entry consists of the lowest PC byte only. A full entry consists of all PC bytes. If the PC
remains in the same 256 byte range, then a compressed entry is made, otherwise a full entry is made. The
full entry is always the last entry of a record.
Each trace buffer line consists of 7 payload bytes, PLB0-6, containing full or compressed CPU PC
addresses and 1 information byte to indicate the type of entry (compressed or base address) for each
payload byte.
Each trace buffer line is filled from right to left. The final entry on each line is always a base address, used
as a reference for the previous entries on the same line. Whilst tracing, a base address is typically stored
Table 6-55. CINF Field Descriptions
Field Description
7–6
CSZ
Access Type Indicator — This field indicates the CPU access size.
00 8-bit Access
0116-bit Access
10 24-bit Access
11 32-bit Access
5
CRW
Read/Write Indicator — Indicates if the corresponding stored address corresponds to a read or write access.
0 Write Access
1 Read Access
Table 6-56. TSINF Field Descriptions
Field Description
3
CTI
Comparator Timestamp Indicator — This bit indicates if the trace buffer entry corresponds to a comparator
timestamp.
0 Trace buffer entry initiated by trace mode specification conditions or timestamp counter overflow
1 Trace buffer entry initiated by comparator D match
2
PC
Program Counter Valid Indicator — Indicates if the PC entry is valid on the timestamp line.
0 Trace buffer entry does not include PC value
1 Trace buffer entry includes PC value
0
TOVF
Timestamp Overflow Indicator — Indicates if the trace buffer entry corresponds to a timestamp overflow
0 Trace buffer entry not initiated by a timestamp overflow
1 Trace buffer entry initiated by a timestamp overflow
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in bytes[6:4], the other payload bytes may be compressed or complete addresses as indicated by the info
byte bits.
If the info bit for byte3 indicates a full CPU PC address, whereby bytes[5:3] are used, then the info bit
mapped to byte[4] is redundant and the byte[6] is unused because a line overflow has occurred. Similarly
a base address stored in bytes[4:2] causes line overflow, so bytes[6:5] are unused.
CXINF[6:4] indicate how many bytes in a line contain valid data, since tracing may terminate before a
complete line has been filled.
CXINF Information Byte Source Tracing
Pure PC mode tracing does not support timestamps or external event entries.
6.4.5.3 Timestamp
When set, the STAMP bit in DBGTCRL configures the DBG to add a timestamp to trace buf fer en tries in
Normal, Loop1 and Detail trace buffer modes. The timestamp is generated from a 16-bit counter and is
stored to the trace buffer line each time a trace buffer entry is made.
Table 6-57. Pure PC Mode Trace Buffer Format Single Source
Mode 8-Byte Wide Trace Buffer Line
76543210
CPU CXINF BASE BASE BASE PLB3 PLB2 PLB1 PLB0
76543 210
CXINF MAT PLEC NB3 NB2 NB1 NB0
Figure 6-29. Pure PC Mode CXINF
Table 6-58. CXINF Field Descriptions
Field Description
MAT Mid Aligned Trigger— This bit indicates a mid aligned trigger position. When a mid aligned trigger occurs, the
next trace buffer entry is a base address and the counter is incremented to a new line, independent of the number
of bytes used on the current line. The MAT bit is set on the current line, to indicate the position of the trigger.
When configured for begin or end aligned trigger, this bit has no meaning.
NOTE: In the case when ARM and TRIG are simultaneously set together in the same cycle that a new PC value
is registered, then this PC is stored to the same trace buffer line and MAT set.
0 Line filled without mid aligned trigger occurrence
1 Line last entry is the last PC entry before a mid aligned trigger
PLEC[2:0] Payload Entry Count— This field indicates the number of valid bytes in the trace buffer line
Binary encoding is used to indicate up to 7 valid bytes.
NBx Payload Compression IndicatorThis field indicates if the corresponding payload byte is the lowest byte of a
base PC entry
0 Corresponding payload byte is a not the lowest byte of a base PC entry
1 Corresponding payload byte is the lowest byte of a base PC entry
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The number of core clock cycles since the last entry equals the timestamp + 1. The core clock runs at twice
the frequency of the bus clock. The timestamp of the first trace buffer entry is 0x0000. With timestamps
enabled trace buffer entries are initiated in the following ways:
according to the trace mode specification, for example COF PC addresses in Normal mode
on a timestamp counter overflow
If the timestamp counter reaches 0xFFFF then a trace buffer entry is made, with timestamp=
0xFFFF and the timestamp overflow bit TOVF is set.
on a match of comparator D
If STAMP and DSTAMP are set then comparator D is used for forcing trace buffer entries with
timestamps. The state control register settings determine if comparator D is also used to trigger the
state sequencer. Thus if the state control register configuration does not use comparator D, then it
is used solely for the timestamp function. If comparator D initiates a timestamp then the CTI bit is
set in the INFO byte. This can be used in Normal/Loop1 mode to indicate when a particular data
access occurs relative to the PC flow. For example when the timing of an access may be unclear
due to the use of indexes.
NOTE
If comparator D is configured to match a PC address then associated
timestamps trigger a trace buffer entry during execution of the previous
instruction. Thus the PC stored to the trace buffer is that of the previous
instruction.The comparator must contain the PC address of the instruction’ s
first opcode byte
Timestamps are disabled in Pure PC mode.
6.4.5.4 Reading Data from Trace Buffer
The data stored in the trace buffer can be read using either the background debug controller (BDC) module
or the CPU provided the DBG module is not armed and is configured for tracing by TSOURCE. When the
ARM bit is set the trace buffer is locked to prevent reading. The trace buffer can only be unlocked for
reading by an aligned word write to DBGTB when the module is disarmed. The trace buffer can only be
read through the DBGTB register using aligned word reads. Reading the trace buffer while the DBG
module is armed, or trace buffer locked returns 0xEE and no shifting of the RAM pointer occurs. Any byte
or misaligned reads return 0xEE and do not cause the trace buffer pointer to increment to the next trace
buffer address.
Reading the trace buffer is prevented by internal hardware whilst profiling is active because the RAM
pointer is used to indicate the next row to be transmitted. Thus attempted reads of DBGTB do not return
valid data when the PTACT bit is set. To initialize the pointer and read profiling data, the PTACT bit must
be cleared and remain cleared.
The trace buf fer data is read out first-in first-out. By reading CNT in DBGCNT the number of valid 64-bit
lines can be determined. DBGCNT does not decrement as data is read.
Whilst reading, an internal pointer is used to determine the next line to be read. After a tracing session, the
pointer points to the oldest data entry, thus if no overflow has occurred, the pointer points to line0. The
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pointer is initialized by each aligned write to DBGTB to point to the oldest data again. This enables an
interrupted trace buffer read sequence to be easily restarted from the oldest data entry. After reading all
trace buffer lines, the next read wraps around and returns the contents of line0.
The least significant word of each 64-bit wide array line is read out first. All bytes, including those
containing invalid information are read out.
6.4.5.5 Trace Buffer Reset State
The trace buffer contents are not initialized by a system res et. Thus shou ld a system reset occur, the trace
session information from immediately before the reset occurred can be read out. The DBGCNT bits are
not cleared by a system reset. Thus should a reset occur, the number of valid lines in the trace buffer is
indicated by DBGCNT. The internal pointer is cleared by a system reset. It can be initialized by an aligned
word write to DBGTB following a reset during debugging, so that it points to the oldest valid data again.
Debugging occurrences of system resets is best handled using mid or end trigger alignment since the reset
may occur before the trace trigger , which in the begin trigger alignment case means no information would
be stored in the trace buffer.
6.4.6 Code Profiling
6.4.6.1 Code Profiling Overview
Code profiling supplies encoded COF information on the PDO pin and the reference clock on the
PDOCLK pin. If the TSOURCE bit is set then code profiling is enabled by setting the PROFILE bit. The
associated device pin is configured for code profiling by setting the PDOE bit. Once enabled, code
profiling is activated by arming the DBG. During profiling, if PDOE is set, the PDO operates as an output
pin at a half the internal bus frequency, driving both high and low.
Independent of PDOE status, profiling data is stored to the trace buffer and can be read out in the usual
manner when the debug session ends and the PTACT bit has been cleared.
The external debugger uses both edges of the clock output to strobe the data on PDO. The first PDOCLK
edge is used to sample the first data bit on PDO.
Figure 6-30. Profiling Output Interface
DEV TOOL
PDO
PDOCLK
DATA
CLOCK
DBG
TBUF
MCU
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Figure 6-31 shows the profiling clock, PDOCLK, whose edges are offset from the bus clock, to ease setup
and hold time requirements relative to PDO, which is synchronous to the bus clock.
Figure 6-31. PDO Profiling Clock Control
The trace buffer is us ed as a temporary storage medium to store COF in formation before it is transmitted.
COF information can be transmitted whilst new informat ion is written to the trace buffer. The trace buffer
data is transmitted at PDO least significant bit firs t. After the first trace buf fer entry is made, transmission
begins in the first clock period in which no further data is written to the trace buffer.
If a trace buffer line transmission completes before the next trace buf fer line is ready , then the clock output
is held at a constant level until the line is ready for transfer.
6.4.6.2 Profiling Configuration, Alignment and Mode Dependencies
The PROFILE bit must be set and the DBG armed to enable profiling. Furthermore the PDOE bit must be
set to configure the PDO and PDOCLK pins for profiling.
If TALIGN is configured for Begin-aligned tracing, then profiling begins when the state sequencer enters
Final State. If PREND is clear then profiling entries continue until a software disarm or trace buffer
overflow occurs. If PREND is set then, when the trace buffer is full, the profiling session is terminated, the
PTBOVF bit is set and the ARM bit is cleared. This prevents rollover from overwriting the initial PTS
entry and thus allows the trace buffer contents, containing the start address, to be read out by a debugger.
Mid-Align tracing is not supported whilst profiling; if the TALIGN bits are configured for Mid-Align
tracing when PROFILE is set, then the alignment defaults to end alignment.
If TALIGN is configured for End-Aligned tracing then profiling begins as soon as the module is armed. If
PREND is clear then profiling entries continue until either a trace buffer overflow occurs or the DBG is
disarmed by a state machine transition to State0. If PREND is set then, when the trace buffer is full, the
profiling session is terminated, the PTBOVF bit is set and the ARM bit is cleared.
The profiling output transmission continues, even after disarming, until all trace buffer entries have been
transmitted. The PTACT bit indicates if a profiling transmission is still active. The PTBOVF indicates if
a trace buffer overflow has occurred.
The profiling timestamp feature is used only for the PTVB and PTW formats, thus differing from
timestamps offered in other modes.
Profiling does not support trace buffer gating. The external pin gating feature is ignored during profiling.
BUS CLOCK
PDO
STROBE
CLOCK ENABLE
PDOCLK
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When the DBG module is disarmed but profiling transmission is ongoing, register write accesses are
suppressed and reading from the DBGTB returns the code 0xEEEE.
6.4.6.3 Code Profiling Internal Data Storage Format
When profiling starts, the first trace buffer entry is made to provide the start address. This uses a 4 byte
format (PTS), including the INFO byte and a 3-byte PC start address. In order to avoid trace buffer
overflow a fully compressed format is used for direct (conditional branch) COF information.
Table 6-59. Profiling Trace buffer line format
The INFO byte indicates the line format used. Up to 4 bytes of each line are dedicated to branch COFs.
Further bytes are used for storing indirect COF information (indexed jumps and interrupt vectors).
Indexed jumps force a full line entry with the PTIB format and require 3-bytes for the full 24-bit
destination address. Interrupts force a full line entry with the PTVB format, whereby vectors are stored as
a single byte and a 16-bit timestamp value is stored simultaneously to indicate the number of core clock
cycles relative to the previous COF. At each trace buffer entry the 16-bit timestamp counter is cleared. The
device vectors use address[8:0] whereby address[1:0] are constant zero for vectors. Thus the value stored
to the PTVB vector byte is equivalent to (Vector Address[8:1]).
After the PTS entry, the pointer increments and the DBG begins to fill the next line with direct COF
information. This continues until the direct COF field is full or an indirect COF occurs, then the INFO byte
and, if needed, indirect COF information are entered on that line and the pointer increments to the next line.
If a timestamp overflow occurs, indicating a 65536 bus clock cycles without COF, then an entry is made
with the TSOVF bit set, INFO[6] (Table 6-60) and profiling continues.
If a trace buffer overflow occu rs, a final entry is made with the TBOVF bit set, profiling is terminated and
the DBG is disarmed. Trace buffer overflow occurs when the trace buffer contains 64 lines pending
transmission.
Whenever the DBG is disarmed during profiling, a final entry is made with the TERM bit set to indicate
the final entry.
When a final entry is made then by default the PTW line format is used, except if a COF occurs in the same
cycle in which case the corresponding PTIB/PTVB/PTHF format is used. Since the development tool
receives the INFO byte first, it can determine in advance the format of data it is about to receive. The
Format 8-Byte Wide Trace Buffer Line
76543210
PTS PC Start Address INFO
PTIB Indirect Indirect Indirect Direct Direct Direct Direct INFO
PTHF 0 Direct Direct Direct Direct INFO
PTVB Timestamp Timestamp Vector Direct Direct Direct Direct INFO
PTW Timestamp Timestamp 0 Direct Direct Direct Direct INFO
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transmission of the INFO byte starts when a line is complete. Whole bytes are always transmitted. The
grey shaded bytes of Table 6-59 are not transmitted.
Figure 6-32. INFO byte encoding
Table 6-60. Profiling Format Encoding
6.4.6.4 Direct COF Compression
Each branch COF is stored to the trace buf fer as a single bit (0=branch not taken, 1=branch taken) until an
indirect COF (indexed jump, return, or interrupt) occurs. The branch COF entries are stored in the byte
fields labelled “Direc t” in Table 6-59. These entries start at byte1[0] and continue through to byte4[7], or
until an indirect COF occurs, whichever occurs sooner. The entries use a format whereby the left most
asserted bit is always the stop bit, which indicates that the bit to its right is the first direct COF and byte1[0]
is the last COF that occurred before the indirect COF. This is shown in Table 6-61, whereby the Bytes 4 to
1 of the trace buffer are shown for 3 different cases. The stop bit field for each line is shaded.
In line0, the left most asserted bit is Byte4[7]. This indicates that all remaining 31 bits in the 4-byte field
contain valid direct COF information, whereby each 1 represents branch taken and each 0 represents
branch not taken. The stop bit of line1 indicates that all 30 bits to it’s right are valid, after the 30th direct
COF entry, an indirect COF occurred, that is stored in bytes 7 to 5. In this case the bit to the lef t of the stop
bit is redundant. Line2 indicates that an indirect COF occurred after 8 direct COF entries. The indirect COF
address is stored in bytes 7 to 5. All bits to the left of the stop bit are redundant.
76543210
0 TSOVF TBOVF TERM Line Format
INFO[3:0] Line Format Source Description
0000 PTS CPU Initial CPU entry
0001 PTIB CPU Indexed jump with up to 31 direct COFs
0010 PTHF CPU 31 direct COFs without indirect COF
0011 PTVB CPU Vector with up to 31 direct COFs
0111 PTW CPU Error (Error codes in INFO[7:4])
Others Reserved CPU Reserved
INFO[7:4] Bit Name Description
INFO[7] Reserved CPU Reserved
INFO[6] TSOVF CPU Timestamp Overflow
INFO[5] TBOVF CPU Trace Buffer Overflow
INFO[4] TERM CPU Profiling terminated by disarming
Vector[7:0] Vector[7:0] CPU Device Interrupt Vector Address [8:1]
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6.4.7 Breakpoints
Breakpoints can be generated by state sequencer transitions to State0. Transitions to State0 are forced by
the following events
Through comparator matches via Final State.
Through software writing to the TRIG bit in the DBGC1 register via Final State.
Through the external event input (DBGEEV) via Final State.
Through a profiling trace buffer overflow event.
Breakpoints are not generated by software writes to DBGC1 that clear the ARM bit.
6.4.7.1 Breakpoints From Comparator Matches or External Events
Breakpoints can be generated when the state sequencer transitions to State0 following a comparator match
or an external event.
If a tracing session is selected by TSOURCE, the transition to State0 occurs when the tracing session has
completed, thus if Begin or Mid aligned triggering is selected, the breakpoint is requested only on
completion of the subsequent trace. If End aligned tracing or no tracing session is selected, the transition
to State0 and associated breakpoints are immediate.
6.4.7.2 Breakpoints Generated Via The TRIG Bit
When TRIG is written to “1”, the Final State is entered. If a tracing session is selected by TSOURCE,
State0 is entered and breakpoints are requested only when the tracing session has completed, thus if Begin
or Mid aligned triggering is selected, the breakpoint is requested only on completion of the subsequent
trace. If no tracing session is selected, the state sequencer enters State0 immediately and breakpoints are
requested. TRIG breakpoints are possible even if the DBG module is disarmed.
6.4.7.3 DBG Breakpoint Priorities
If a TRIG occurs after Begin or Mid aligned tracing has already been triggered by a comparator instigated
transition to Final State, then TRIG no longer has an effect. When the associated tracing session is
complete, the breakpoint occurs. Similarly if a TRIG is followed by a subsequent comparator match, it has
no effect, since tracing has already started.
Line Byte4 Byte3 Byte2 Byte1
Line0 10010010010110010010000110000110
Line1 0 1100101100100101100100101100100
Line2 00000000000000000000000100010001
Table 6-61. Profiling Direct COF Format
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6.4.7.3.1 DBG Breakpoint Priorities And BDC Interfacing
Breakpoint operation is dependent on the state of the S12ZBDC module. BDM cannot be entered from a
breakpoint unless the BDC is enabled (ENBDC bit is set in the BDC). If BDM is already active,
breakpoints are disabled. In addition, while executing a BDC STEP1 command, breakpoints are disabled.
When the DBG breakpoints are mapped to BDM (BDMBP set), then if a breakpoint request, either from
a BDC BACKGROUND command or a DBG event, coincides with an SWI instruction in application
code, (i.e. the DBG requests a breakpoint at the next instruction boundary and the next instruction is an
SWI) then the CPU gives priority to the BDM request over the SWI request.
On returning from BDM, the SWI from user code gets executed. Breakpoint generation control is
summarized in Table 6-62.
6.5 Application Information
6.5.1 Avoiding Unintended Breakpoint Re-triggering
Returning from an instruction address breakpoint using an RTI or BDC GO command without PC
modification, returns to the instruction that generated the breakpoint. If an active breakpoint or trigger still
exists at that address, this can re-trigger , disarming the DBG. If configured for BDM breakpoints, the user
must apply the BDC STEP1 command to increment the PC past the current instruction.
If configured for SWI breakpoints, the DBG can be re configured in the SWI routine. If a comparator
match occurs at an SWI vector address then a code SWI and DBG breakpoint SWI could occur
simultaneously. In this case the SWI routine is executed twice before returning.
6.5.2 Debugging Through Reset
To debug through reset, the debugger can recognize a reset occurrence and pull the device BKGD pin low.
This forces the device to leave reset in special single chip (SSC) mode, because the BKGD pin is used as
the MODC signal in the reset phase. When the device leaves reset in SSC mode, CPU execution is halted
and the device is in active BDM. Thus the debugger can configure the DBG for tracing and breakpoints
before returning to application code execution. In this way it is possible to analyze the sequence of events
emerging from reset. The recommended handling of the internal reset scenario is as follows:
Table 6-62. Breakpoint Mapping Summary
BRKCPU BDMBP Bit
(DBGC1[4])
BDC
Enabled
BDM
Active
Breakpoint
Mapping
0 X X X No Breakpoint
1 0 X 0 Breakpoint to SWI
1011 No Breakpoint
1 1 0 X No Breakpoint
1110 Breakpoint to BDM
1111 No Breakpoint
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When a reset occurs the debugger pulls BKGD low until the reset ends, forcing SSC mode entry.
Then the debugger reads the reset flags to determine the cause of reset.
If required, the debugger can read the trace buf fer to see what happened just before reset. Since the
trace buffer and DBGCNT register are not affected by resets other than POR.
The debugger configures and arms the DBG to start tracing on returning to application code.
The debugger then sets the PC according to the reset flags.
Then the debugger returns to user code with GO or STEP1.
6.5.3 Breakpoints from other S12Z sources
The DBG is neither affected by CPU BGND instructions, nor by BDC BACKGROUND commands.
6.5.4 Code Profiling
The code profiling data output pin PDO is mapped to a device pin that can also be used as GPIO in an
application. If profiling is required and all pins are required in the application, it is recommended to use
the device pin for a simple output function in the application, without feedback to the chip. In this way the
application can still be profiled, since the pin has no effect on code flow.
The PDO provides a simple bit stream that must be strobed at both edges of the profiling clock when
profiling. The external development tool activates profiling by setting the DBG ARM bit, with PROFI LE
and PDOE already set. Thereafter the first bit of the profiling bit stream is valid at the first rising edge of
the profiling clock. No start bit is provided. The external development tool must detect this first rising edge
after arming the DBG. To detect the end of profiling, the DBG ARM bit can be monitored using the BDC.
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Chapter 7
ECC Generation Module (SRAM_ECCV1)
7.1 Introduction
The purpose of ECC logic is to detect and correct as much as possible memory data bit er rors. These soft
errors, mainly generated by alpha radiation, can occur randomly during operation. "Soft error" means that
only the information inside the memory cell is corrupt; the memory cell itself is not damaged. A write
access with correct data solves the issue. If the ECC algorithm is able to correct the data, then the sy stem
can use this corrected data without any issues. If the ECC algorithm is able to detect, but not correct the
error, then the system is able to ignore the memory read data to avoid system malfunction.
The ECC value is calculated based on an aligned 2 byte memory data word. The ECC algorithm is able to
detect and correct single bit ECC errors. Double bit ECC errors will be detected but the system is not able
to correct these errors. This kind of ECC code is called SECDED code. This ECC code requires 6
additional parity bits for each 2 byte data word.
7.1.1 Features
The SRAM_ECC module provides the ECC logic for the system memory based on a SECDED algorithm.
The SRAM_ECC module includes the following features:
SECDED ECC code
Single bit error detection and correction per 2 byte data word
Double bit error detection per 2 byte data word
Memory initialization function
Byte wide system memory write access
Automatic single bit ECC error correction for read and write accesses
Debug logic to read and write raw use data and ECC values
7.2 Memory Map and Register Definition
This section provides a detailed description of all memory and registers for the SRAM_ECC module.
7.2.1 Register Summary
Figure 7-1 shows the summary of all implemented registers inside the SRAM_ECC module.
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NOTE
Register Address = Module Base Address + Address Offset, where the
Module Base Address is defined at the MCU level and the Address Offset
is defined at the module level.
Figure 7-1. SRAM_ECC Register Summary
Address Offset
Register Name Bit 7654321Bit 0
0x0000
ECCSTAT
R0000000RDY
W
0x0001
ECCIE
R0000000
SBEEIE
W
0x0002
ECCIF
R0000000
SBEEIF
W
0x0003 - 0x0006
Reserved
R00000000
W
0x0007
ECCDPTRH
RDPTR[23:16]
W
0x0008
ECCDPTRM
RDPTR[15:8]
W
0x0009
ECCDPTRL
RDPTR[7:1] 0
W
0x000A - 0x000B
Reserved
R00000000
W
0x000C
ECCDDH
RDDATA[15:8]
W
0x000D
ECCDDL
RDDATA[7:0]
W
0x000E
ECCDE
R0 0 DECC[5:0]
W
0x000F
ECCDCMD
RECCDRR 00000
ECCDW ECCDR
W
= Unimplemented, Reserved, Read as zero
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7.2.2 Register Descriptions
This section consists of register descriptions in address order . Each description includes a standard register
diagram with an associated figure number. Details of register bit and field functions follow the register
diagrams, in bit order.
7.2.2.1 ECC Status Register (ECCSTAT)
Figure 7-2. ECC Status Register (ECCSTAT)
Table 7-2. ECCSTAT Field Description
7.2.2.2 ECC Interrupt Enable Register (ECCIE)
Figure 7-3. ECC Interrupt Enable Register (ECCIE)
Table 7-3. ECCIE Field Description
Module Base + 0x00000 Access: User read only(1)
1. Read: Anytime
Write: Never
765432 1 0
R0000 0 0 0 RDY
W
Reset0000000 0
Field Description
0
RDY
ECC Ready— Shows the status of the ECC module.
0 Internal SRAM initialization is ongoing, access to the SRAM is disabled
1 Internal SRAM initialization is done, access to the SRAM is enabled
Module Base + 0x00001 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
765432 1 0
R0000000
SBEEIE
W
Reset0000000 0
Field Description
0
SBEEIE
Single bit ECC Error Interrupt Enable — Enables Single ECC Error interrupt.
0 Interrupt request is disabled
1 Interrupt will be requested whenever SBEEIF is set
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7.2.2.3 ECC Interrupt Flag Register (ECCIF)
Figure 7-4. ECC Interrupt Flag Register (ECCIF)
Table 7-4. ECCIF Field Description
Module Base + 0x0002 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear
765432 1 0
R0000000
SBEEIF
W
Reset0000000 0
Field Description
0
SBEEIF
Single bit ECC Error Interrupt Flag — The flag is set to 1 when a single bit ECC error occurs.
0 No occurrences of single bit ECC error since the last clearing of the flag
1 Single bit ECC error has occured since the last clearing of the flag
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7.2.2.4 ECC Debug Pointer Register (ECCDPTRH, ECCDPTRM,
ECCDPTRL)
Module Base + 0x0007 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
DPTR[23:16]
W
Reset00000000
Module Base + 0x0008 Access: User read/write
76543210
R
DPTR[15:8]
W
Reset00000000
Module Base + 0x0009 Access: User read/write
76543210
R
DPTR[7:1]
0
W
Reset00000000
= Unimplemented
Figure 7-5. ECC Debug Pointer Register (ECCDPTRH, ECCDPTRM, ECCDPTRL)
Table 7-5. ECCDPTR Register Field Descriptions
Field Description
DPTR
[23:0]
ECC Debug Pointer — This register contains the system memory address which will be used for a debug
access. Address bits not relevant for SRAM address space are not writeable, so the software should read back
the pointer value to make sure the register contains the intended memory address. It is possible to write an
address value to this register which points outside the system memory. There is no additional monitoring of the
register content; therefore, the software must make sure that the address value points to the system memory
space.
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7.2.2.5 ECC Debug Data (ECCDDH, ECCDDL)
7.2.2.6 ECC Debug ECC (ECCDE)
Figure 7-7. ECC Debug ECC (ECCDE)
Table 7-7. ECCDE Field Description
Module Base + 0x000C Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
DDATA[15:8]
W
Reset00000000
Module Base + 0x000D Access: User read/write
76543210
R
DDATA[7:0]
W
Reset00000000
= Unimplemented
Figure 7-6. ECC Debug Data (ECCDDH, ECCDDL)
Table 7-6. ECCDD Register Field Descriptions
Field Description
DDATA
[23:0]
ECC Debug Raw Data — This register contains the raw data which will be written into the system memory
during a debug write command or the read data from the debug read command.
Module Base + 0x000E Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R 0 0
DECC[5:0]
W
Reset00000000
Field Description
5:0
DECC[5:0]
ECC Debug ECC — This register contains the raw ECC value which will be written into the system memory
during a debug write command or the ECC read value from the debug read command.
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7.2.2.7 ECC Debug Command (ECCDCMD)
Figure 7-8. ECC Debug Command (ECCDCMD)
Table 7-8. ECCDCMD Field Description
7.3 Functional Description
The bus system allows 1, 2, 3 and 4 byte write access to a 4 byte aligned memory address, but the ECC
value is generated based on an aligned 2 byte data word. Depending on the access type, the access is
separated into different access cycles. Table 7-9 shows the different access types with the expected number
of access cycles and the performed internal operations.
Module Base + 0x000F Access: User read/write(1)
1. Read: Anytime
Write: Anytime, in special mode only
76543210
R
ECCDRR
0 0 000
ECCDW ECCDR
W
Reset00000000
Field Description
7
ECCDRR
ECC Disable Read Repair Function— Writing one to this register bit will disable the automatic single bit ECC
error repair function during read access; see also chapter 7.3.7, “ECC Debug Behavior”.
0 Automatic single ECC error repair function is enabled
1 Automatic single ECC error repair function is disabled
1
ECCDW
ECC Debug Write Command Writing one to this register bit will perform a debug write access, to the system
memory. During this access the debug data word (DDATA) and the debug ECC value (DECC) will be written to
the system memory address defined by DPTR. If the debug write access is done, this bit is cleared. Writing 0
has no effect. It is not possible to set this bit if the previous debug access is ongoing (ECCDW or ECCDR bit set).
0
ECCDR
ECC Debug Read Command Writing one to this register bit will perform a debug read access from the system
memory address defined by DPTR. If the debug read access is done, this bit is cleared and the raw memory read
data are available in register DDATA and the raw ECC value is available in register DECC. Writing 0 has no
effect. If the ECCDW and ECCDR bit are set at the same time, then only the ECCDW bit is set and the Debug
Write Command is performed. It is not possible to set this bit if the previous debug access is ongoing (ECCDW
or ECCDR bit set).
Table 7-9. Memory access cycles
Access type ECC
error
access
cycle Internal operation Memory
content Error indication
2 and 4 byte
aligned write
access
1 write to memory new data
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274 Freescale Semiconductor
The single bit ECC error generates an interrupt when enabled. The double bit ECC errors are reported by
the SRAM_ECC module, but handled at MCU level. For more information, see the MMC description.
7.3.1 Aligned 2 and 4 Byte Memory Write Access
During an aligned 2 or 4 byte memory write access, no ECC check is performed. The internal ECC logic
generates the new ECC value based on the write data and writes the data words together with the generated
ECC values into the memory.
7.3.2 Other Memory Write Access
Other types of write accesses are separated into a read-modify-write operation. During the first cycle, the
logic reads the data from the memory and performs an ECC check. If no ECC errors were detected then
the logic generates the new ECC value based on the read and write data and writes the new data word
together with the new ECC value into the memory. If required both 2 byte data words are updated.
If the module detects a single bit ECC error during the read cycle, then the logic generates the new ECC
value based on the corrected read and new write read. In the next cycle, the new data word and the new
ECC value are written into the memory. If required both 2 byte data words are updated. The SBEEIF bit
is set. Hence, the single bit ECC error was corrected by the write access. Figure 7-9 shows an example of
a 2 byte non-aligned memory write access.
If the module detects a double bit ECC error during the read cycle, then the write access to the memory is
blocked and the initiator module is informed about the error.
1 or 3 byte write,
non-aligned 2
byte write
no 2 read data from the memory old + new
data
write old + new data to the memory
single
bit 2
read data from the memory corrected +
new data SBEEIF
write corrected + new data to the
memory
double
bit 2read data from the memory unchanged initiator module is
informed
ignore write data
read access
no 1 read from memory unchanged -
single
bit 1(1) read data from the memory corrected
data SBEEIF
write corrected data back to memory
double
bit 1read from memory unchanged data mark as invalid
1. The next back to back read access to the memory will be delayed by one clock cycle
Table 7-9. Memory access cycles
Access type ECC
error
access
cycle Internal operation Memory
content Error indication
Chapter 7 ECC Generation Module (SRAM_ECCV1)
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.
Figure 7-9. 2 byte non-aligned write access
7.3.3 Memory Read Access
During each memory read access an ECC check is performed. If the logic detects a single bit ECC error,
then the module corrects the data, so that the access initiator module receives correct data. In parallel, the
logic writes the corrected data back to the memory, so that this read access repairs the single bit ECC error.
This automatic ECC read repair function is disabled by setting the ECCDRR bit.
If a single bit ECC error was detected, then the SBEEIF flag is set.
If the logic detects a double bit ECC error, then the data word is flagged as invalid, so that the access
initiator module can ignore the data.
7.3.4 Memory Initialization
To avoid spurious ECC error reporting, memory operations that allow a read before a first write (like the
read-modify-write operation of the unaligned access) require that the memory contains valid ECC values
before the first read-modify-write access is performed. The ECC module provides logic to initialize the
complete memory content with zero during the power up phase. During the initialization process the access
to the SRAM is disabled and the RDY status bit is cleared. If the initialization process is done, SRAM
access is possible and the RDY status bit is set.
7.3.5 Interrupt Handling
This section describes the interrupts generated by the SRAM_ECC module and their individual sources.
Vector addresses and interrupt priority are defined at the MCU level.
ECC
2 byte use data
correct read data
read out data
and correct if
single bit ECC
error was found
write data
ECC
correct
read data write data
ECC
2 byte use data
correct read data
read out data
and correct if
single bit ECC
error was found
write data
ECC
correct
read data
write data 4 byte write data to system memory
4 byte read data from system memory
2 byte write data
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276 Freescale Semiconductor
7.3.6 ECC Algorithm
The table below shows the equation for each ECC bit based on the 16 bit data word.
Table 7-11. ECC Calculation
7.3.7 ECC Debug Behavior
For debug purposes, it is possible to read and write the uncorrected use data and the raw ECC value directly
from the memory. For these debug accesses a register interface is available. The debug access is performed
with the lowest priority; other memory accesses must be done before the debug access starts. If a debug
access is requested during an ongoing memory initialization process, then the debug access is performed
if the memory initialization process is done.
If the ECCDRR bit is set, then the automatic single bit ECC error repair function for all read accesses is
disabled. In this case a read access from a syste m memory location with single bit ECC error will produce
correct data and the single bit ECC error is flagged by the SBEEIF, but the data inside the system memory
are unchanged.
By writing wrong ECC values into the system memory the debug access can be used to force single and
double bit ECC errors to check the software error handling.
It is not possible to set the ECCDW or ECCDR bit if the previous debug access is ongoing (ECCDW or
ECCDR bit active). This ensures that the ECCDD and ECCDE registers contains consistent data. The
software should read out the status of the ECCDW and ECCDR register bit before a new debug access is
requested.
7.3.7.1 ECC Debug Memory Write Access
Writing one to the ECCDW bit performs a debug write access to the memory address defined by register
DPTR. During this access, the raw data DDATA and the ECC value DECC are written directly into the
system memory. If the debug write access is done, the ECCDW register bit is cleared. The debug write
Table 7-10. SRAM_ECC Interrupt Sources
Module Interrupt Sources Local Enable
Single bit ECC error ECCIE[SBEEIE]
ECC bit Use data
ECC[0] ~ ( ^ ( data[15:0] & 0x443F ) )
ECC[1] ~ ( ^ ( data[15:0] & 0x13C7 ) )
ECC[2] ~ ( ^ ( data[15:0] & 0xE1D1 ) )
ECC[3] ~ ( ^ ( data[15:0] & 0xEE60 ) )
ECC[4] ~ ( ^ ( data[15:0] & 0x3E8A ) )
ECC[5] ~ ( ^ ( data[15:0] & 0x993C ) )
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access is always a 2 byte aligned memory access, so that no ECC check is performed and no single or
double bit ECC error indication is activated.
7.3.7.2 ECC Debug Memory Read Access
W riting one to the ECCDR bit performs a debug read access from the memory address defined by register
DPTR. If the ECCDR bit is cleared then the register DDATA contains the uncorrected read data from the
memory. The register DECC contains the ECC value read from the memory . Independent of the ECCDRR
register bit setting, the debug read access will not perform an automatic ECC repair during read access.
During the debug read access no ECC check is performed, so that no single or double bit ECC error
indication is activated.
If the ECCDW and the ECCDR bits are set at the same time, then only the debug write access is performed.
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MC9S12ZVM Family Reference Manual Rev. 2.2
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Chapter 8
S12 Clock, Reset and Power Management Unit (V10 and V6)
Table 8-1. Revision History
8.1 Introduction
This specification describes the function of the Clock, Reset and Power Management Unit
(S12_CPMU_UHV_V10 and S12CPMU_UHV_V6).
Rev. No.
(Item No)
Date
(Submitted By) Sections Affected Substantial Change(s)
V10.00 1 Dec. 2014 Initial version copied from V06.xx
CPMUVREGCTL register: added EXTS1ON and EXTS2ON
Bits
V10.01 3 Dec. 2014
Signal Description: added Figures to illustrate application of
BCTL and BCTLS1
VDDS1, VDDS2, SNPS1, SNPS2, BCTLS1, BCTLS2:
added pins to Block Diagram and Signal Description
V10.02 22 Jan. 2015 correct typo in CPMUVREGTRIM0 register bits
V10.03 23 Jan. 2015 added section: differences between V10 and V6
changed Framemaker variables to have V10_V6 instead of V10
V10.04 27 Jan. 2015 Diagram “BCTLS1 application example”: added VRH switch
Added bits VRH2EN and VRH1EN to CPMUVREGCTL register
V10.05 10 Feb. 2015 Signal description of VDDS1/2: removed statement “monitored
by LVR”
Formal cleanup of header 1.2.6
V10.06 20 Feb. 2015 CPMUVREGCTL register: added footnote for bits only available
in version V10
V10.07 3 Mar. 2015
CPMULVCTL register: added VDDSIE interrupt enable bit for
VDDS1 and VDDS2 fail events
Added CPMUVDDS register with 4 status bits and 4 interrupt
flags
V10.08 11 Mar. 2015 CPMUVDDS register: added detailed register description
Interrupt chapter: Added VDDS Integrity Interrupt
Updated Differences V10 versus V6
V10.09 27 Mar. 2015 Syntax cleanup
V10.10 22 April 2015 Removed blank page
Corrected typo in Application section
V10.11 24 April 2015 Signal Description: Added more details to the description of the
VDDS1, VDDS2, SNPS1, SNPS2 signals
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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The Pierce oscillator (XOSCLCP) provides a robust, low-noise and low-power external clock
source. It is designed for optimal start-up margin with typical crystal oscillators.
The Voltage regulator (VREGAUTO) operates from the range 6V to 18V. It provides all the
required chip internal voltages and voltage monitors.
The Phase Locked Loop (PLL) provides a highly accurate frequency multiplier with internal filter.
The Internal Reference Clock (IRC1M) provides a 1MHz internal clock.
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8.1.1 Differences between S12CPMU_UHV_V10 and S12CPMU_UHV_V6
The following device pins exist only in V10:
VDDS1, VDDS2, BCTLS1, BCTLS2, SNPS1, SNPS2,
The feature of switching VDDS1/2 to VRH1/2 (which connects to ADC) exists only in V10
The following register and bits exist only in V10:
CPMUVREGCTL register: Bits VRH2EN, VRH1EN, EXTS1ON, EXTS2ON
CPMULVCTL register: Bit VDDSIE
CPMUVDDS register
The VDD Integrity Interrupt only exists in V10
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8.1.2 Features
The Pierce Oscillator (XOSCLCP) contains circuitry to dynamically control current gain in the output
amplitude. This ensures a signal with low harmonic distortion, low power and good noise immunity.
Supports crystals or resonators from 4MHz to 20MHz.
High noise immunity due to input hysteresis and spike filtering.
Low RF emissions with peak-to-peak swing limited dynamically
Transconductance (gm) sized for optimum start-up margin for typical crystals
Dynamic gain control eliminates the need for external current limiting resistor
Integrated resistor eliminates the need for external bias resistor
Low power consumption: Operates from internal 1.8V (nominal) supply , Amplitude control limits
power
Optional oscillator clock monitor reset
Optional full swing mode for higher immunity against noise injection on the cost of higher power
consumption and increased emission
The Voltage Regulator (VREGAUTO) has the following features:
Input voltage range from 6 to 18V (nominal operating range)
Low-voltage detect (LVD) with low-voltage interrupt (LVI)
Power-on reset (POR)
Low-voltage reset (LVR)
On Chip Temperature Sensor and Bandgap Voltage measurement via internal ADC channel.
Voltage Regulator providing Full Performance Mode (FPM) and Reduced Performance Mode
(RPM)
External ballast device support to reduce internal power dissipation
Capable of supplying both the MCU internally plus external components
Over-temperature interrupt
The Phase Locked Loop (PLL) has the following features:
Highly accurate and phase locked frequency multiplier
Configurable internal filter for best stability and lock time
Frequency modulation for defined jitter and reduced emission
Automatic frequency lock detector
Interrupt request on entry or exit from locked condition
PLL clock monitor reset
Reference clock either external (crystal) or internal square wave (1MHz IRC1M) based.
PLL stability is sufficient for LIN communication in slave mode, even if using IRC1M as reference
clock
The Internal Reference Clock (IRC1M) has the following features:
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Frequency trimming
(A factory trim value for 1MHz is loaded from Flash Memory into the IRCTRIM register after
reset, which can be overwritten by application if required)
Temperature Coefficient (TC) trimming.
(A factory trim value is loaded from Flash Memory into the IRCTRIM register to turn off TC
trimming after reset. Application can trim the TC if required by overwriting the IRCTRIM
register).
Other features of the S12CPMU_UHV_V10_V6 include
Oscillator clock monitor to detect loss of crystal
Autonomous periodical interrupt (API)
Bus Clock Generator
Clock switch to select either PLLCLK or external crystal/resonator based Bus Clock
PLLCLK divider to adjust system speed
System Reset genera tion from the following possible sources:
Power-on reset (POR)
Low-voltage reset (LVR)
COP system watchdog, COP reset on time-out, windowed COP
Loss of oscillation (Oscillator clock monitor fail)
Loss of PLL clock (PLL clock monitor fail)
External pin RESET
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8.1.3 Modes of Operation
This subsection lists and briefly describes all operating modes supported by the
S12CPMU_UHV_V10_V6.
8.1.3.1 Run Mode
The voltage regulator is in Full Performance Mode (FPM).
NOTE
The voltage regulator is active, providing the nominal supply voltages with
full current sourcing capability (see also Appendix for VREG electrical
parameters). The features ACLK clock source, Low Voltage Interrupt (L VI),
Low Voltage Reset (LVR) and Power-On Reset (POR) are available.
The Phase Locked Loop (PLL) is on.
The Internal Reference Clock (IRC1M) is on.
The API is available.
PLL Engaged Internal (PEI)
This is the default mode after System Reset and Power-On Reset.
The Bus Clock is based on the PLLCLK.
After reset the PLL is configured for 50MHz VCOCLK operation.
Post divider is 0x03, so PLLCLK is VCOCLK divided by 4, that is 12.5MHz and Bus Clock is
6.25MHz.
The PLL can be re-configured for other bus frequencies.
The reference clock for the PLL (REFCLK) is based on internal reference clock IRC1M.
PLL Engaged External (PEE)
The Bus Clock is based on the PLLCLK.
This mode can be entered from default mode PEI by performing the following steps:
Configure the PLL for desired bus frequency.
Program the reference divider (REFDIV[3:0] bits) to divide down oscillator frequency if
necessary.
Enable the external oscillator (OSCE bit).
Wait for oscillator to start up (UPOSC=1) and PLL to lock (LOCK=1).
PLL Bypassed External (PBE)
The Bus Clock is based on the Oscillator Clock (OSCCLK).
The PLLCLK is always on to qualify the external oscillator clock. Therefore it is necessary to
make sure a valid PLL configuration is used for the selected oscillator frequency.
This mode can be entered from default mode PEI by performing the following steps:
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Make sure the PLL configuration is valid for the selected oscillator frequency.
Enable the external oscillator (OSCE bit).
Wait for oscillator to start up (UPOSC=1).
Select the Oscillator Clock (OSCCLK) as source of the Bus Clock (PLLSEL=0).
The PLLCLK is on and used to qualify the external oscillator clock.
8.1.3.2 Wait Mode
For S12CPMU_UHV_V10_V6 Wait Mode is the same as Run Mode.
8.1.3.3 Stop Mode
This mode is entered by executing the CPU STOP instruction.
The voltage regulator is in Reduced Performance Mode (RPM).
NOTE
The voltage regulator output voltage may degrade to a lower value than in
Full Performance Mode (FPM), additionally the current sourcing capability
is substantially reduced (see also Appendix for VREG electrical
parameters). Only clock source ACLK is available and th e Power On Reset
(POR) circuitry is functional. The Low Voltage Interrupt (LVI) and Low
Voltage Reset (LVR) are disabled.
The API is available.
The Phase Locked Loop (PLL) is off.
The Internal Reference Clock (IRC1M) is off.
Core Clock and Bus Clock are stopped.
Depending on the setting of the PSTP and the OSCE bit, Stop Mode can be differentiated between Full
Stop Mode (PSTP = 0 or OSCE=0) and Pseudo Stop Mode (PSTP = 1 and OSCE=1). In addition, the
behavior of the COP in each mode will change based on the clocking method selected by
COPOSCSEL[1:0].
Full Stop Mode (PSTP = 0 or OSCE=0)
External oscillator (XOSCLCP) is disabled.
If COPOSCSEL1=0:
The COP and RTI counters halt during Full Stop Mode.
After wake-up from Full Stop Mode the Core Clock and Bus Clock are running on PLLCLK
(PLLSEL=1). COP and RTI are running on IRCCLK (COPOSCSEL0=0, RTIOSCSEL=0).
If COPOSCSEL1=1:
The clock for the COP is derived from ACLK (trimmable internal RC-Oscillator clock). During
Full Stop Mode the ACLK for the COP can be stopped (COP static) or running (COP active)
depending on the setting of bit CSAD. When bit CSAD is set the ACLK clock source for the
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286 Freescale Semiconductor
COP is stopped during Full Stop M ode and COP continues to operate after exit from Full S top
Mode. For this COP configuration (ACLK clock source, CSAD set) a latency time (please refer
to CSAD bit description for details) occurs when entering or exiting (Full, Pseudo) Stop Mode.
When bit CSAD is clear the ACLK clock source is on for the COP during Full S top Mode and
COP is operating.
During Full Stop Mode the RTI counter halts.
After wake-up from Full Stop Mode the Core Clock and Bus Clock are running on PLLCLK
(PLLSEL=1). The COP runs on ACLK and RTI is running on IRCCLK (COPOSCSEL0=0,
RTIOSCSEL=0).
Pseudo Stop Mode (PSTP = 1 and OSCE=1)
External oscillator (XOSCLCP) continues to run.
If COPOSCSEL1=0:
If the respective enable bits are set (PCE=1 and PRE= 1) the COP and RTI will continue to run
with a clock derived from the oscillator clock.
The clock configuration bits PLLSEL, COPOSCSEL0, RTIOSCSEL are unchanged.
If COPOSCSEL1=1:
If the respective enable bit for the RTI is set (PRE=1) the RTI will continue to run with a clock
derived from the oscillator clock.
The clock for the COP is derived from ACLK (trimmable internal RC-Oscillator clock). During
Pseudo Stop Mode the ACLK for the COP can be stopped (COP static) or running (COP active)
depending on the setting of bit CSAD. When bit CSAD is set the ACLK for the COP is stopped
during Pseudo Stop Mode and COP continues to operate after exit from Pseudo Stop Mode.
For this COP configuration (ACLK clock source, CSAD set) a latency time (please refer to
CSAD bit description for details) occurs when entering or exiting (Pseudo, Full) Stop Mode.
When bit CSAD is clear the ACLK clock source is on for the COP during Pseudo Stop Mode
and COP is operating.
The clock configuration bits PLLSEL, COPOSCSEL0, RTIOSCSEL are unchanged.
NOTE
When starting up the external oscillator (either by programming OSCE bit
to 1 or on exit from Full S top Mode with OSCE bit already 1) the software
must wait for a minimum time equivalent to the startup-time of the external
oscillator tUPOSC before entering Pseudo Stop Mode.
8.1.3.4 Freeze Mode (BDM active)
For S12CPMU_UHV_V10_V6 Freeze Mode is the same as Run Mode except for R TI and COP which can
be frozen in Active BDM Mode with the RSBCK bit in the CPMUCOP register . After exiting BDM Mode
RTI and COP will resume its operations starting from this frozen status.
Additionally the COP can be forced to the maximum time-out period in Active BDM Mode. For details
please see also the RSBCK and CR[2:0] bit description field of Table 8-14 in Section 8.3.2.12,
“S12CPMU_UHV_V10_V6 COP Control Register (CPMUCOP)
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 287
8.1.4 S12CPMU_UHV_V10_V6 Block Diagram
Figure 8-1. Block diagram of S12CPMU_UHV_V10_V6
S12CPMU_UHV
EXTAL
XTAL
System Reset
Power-On Detect
Loop
Reference
Divider
Voltage
VSUP
Internal
Reset
Generator
Divide by
Phase
Post
Divider
1,2,.32
VCOCLK
LOCKIE
IRCTRIM[9:0]
SYNDIV[5:0]
LOCK
REFDIV[3:0]
2*(SYNDIV+1)
Pierce
Oscillator
4MHz-20MHz
OSCE
PORF
divide
by 2
ECLK
POSTDIV[4:0]
Power-On Reset
Controlled
locked
Loop with
internal
Filter (PLL)
REFCLK
FBCLK
REFFRQ[1:0]
VCOFRQ[1:0]
Lock
detect
Regulator
6V to 18V
Autonomous
Periodic
Interrupt (API)
API Interrupt
VSS1,2
PLLSEL
VSSX
VDDA
VDDX
Low Voltage Detect
LVRF
PLLCLK
Reference
Clock
(IRC1M)
OSCCLK
Monitor
osc monitor fail
Real Time
Interrupt (RTI)
RTI Interrupt
PSTP
CPMURTI
Oscillator status Interrupt
(XOSCLCP)
High
Temperature
Sense
HT Interrupt
Low Voltage Interrupt
APICLK
RTICLK
IRCCLK
OSCCLK
RTIOSCSEL
COP time-out
PRE
UPOSC=0 sets PLLSEL bit
API_EXTCLK
RC
Osc.
UPOSC
RESET
OSCIE
APIE
RTIE
HTDS HTIE
LVDS LVIE
Low Voltage Detect VDDA
OSCCLK
divide
by 4
Bus Clock
VSSA
ADC
vsup
monitor
(VREGAUTO)
ECLK2X
(Core Clock)
(Bus Clock)
COP time-out
COP
Watchdog
CPMUCOP
COPCLK
IRCCLK
OSCCLK
COPOSCSEL0
to Reset
Generator
PCE
UPOSC
UPOSC=0 clears
ACLK
COPOSCSEL1
CSAD
divide
by 2
ACLK
divide
by 2
IRCCLK
OSCCLK
IRCCLK
PLL lock interrupt
OMRF
COPRF
PMRF
PLL monitor fail
VDDX, VDD, VDDF
OSCMOD
VDD
VDDF
VDDC
BCTL
BCTLC
VDDS1,2
BCTLS1,2
SNPS1,2
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Figure 8-2 shows a block diagram of the XOSCLCP.
Figure 8-2. XOSCLCP Block Diagram
EXTAL XTAL
Gain Control
VDD=1.8V
Rf
OSCCLK
Peak
Detector
VSS
VSS VSS
C1 C2
Quartz Crystals
Ceramic Resonators
or
Clock
Monitor
monitor fail
OSCMOD
+
_
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8.2 Signal Description
This section lists and describes the signals that connect off chip as well as internal supply nodes and special
signals.
8.2.1 RESET
Pin RESET is an active-low bidirectional pin. As an input it initializes the MCU asynchronously to a
known start-up state. As an open-drain output it indicates that an MCU-internal reset has been triggered.
8.2.2 EXTAL and XTAL
These pins provide the interface for a crystal to control the internal clock generator circuitry. EXTAL is
the input to the crystal oscillator amplifier. XTAL is the output of the crystal oscillator amplifier. If
XOSCLCP is enabled, the MCU internal OSCCLK_LCP is derived from the EXTAL input frequency. If
OSCE=0, the EXTAL pin is pulled down by an internal resistor of approximately 200 k and the XTAL
pin is pulled down by an internal resistor of approximately 700 k.
NOTE
Freescale recommends an evaluation of the application board and chosen
resonator or crystal by the resonator or crystal supplier.
The loop controlled circuit (XOSCLCP) is not suited for overtone
resonators and crystals.
8.2.3 VSUP — Regulator Power Input Pin
Pin VSUP is the power input of VREGAUTO. All currents sourced into the regulator loads flow through
this pin.
A suitable reverse battery protection network can be used to connect VSUP to the car battery supply
network.
8.2.4 VDDA, VSSA — Regulator Reference Supply Pins
Pins VDDA and VSSA,are used to supply the analog parts of the regulator. Internal precision reference
circuits are supplied from these signals.
An off-chip decoupling capacitor (220 nF(X7R ceramic)) between VDDA and VSSA is required and can
improve the quality of this supply.
VDDA has to be connected externally to VDDX.
8.2.5 VDDX, VSSX— Pad Supply Pins
VDDX is the supply domain for the digital Pads.
An off-chip decoupling capacitor (10F plus 220 nF(X7R ceramic)) between VDDX and VSSX is
required.
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This supply domain is monitored by the Low Voltage Reset circuit.
VDDX has to be connected externally to VDDA.
8.2.6 VDDC— CAN Supply Pin
VDDC is the supply domain for the CAN module.
An off-chip decoupling capacitor (10F plus 220 nF(X7R ceramic)) between VDDC and VSSX is
required.
This supply domain is monitored by the Low Voltage Reset circuit.
8.2.7 VDDS1— Sensor Supply1 Pin
VDDS1 is a short circuit protected supply domain which is suitable for sensors (wh ich connect externally
to the PCB).
An off-chip decoupling capacitor (4.7F plus 220 nF(X7R ceramic)) between VDDS1 and VSSX is
required.
This supply domain is monitored by a Low Voltage Detect (LVDS1) circuit.
8.2.8 VDDS2— Sensor Supply2 Pin
VDDS2 is a short circuit protected supply domain which is suitable for sensors (wh ich connect externally
to the PCB).
An off-chip decoupling capacitor (4.7F plus 220 nF(X7R ceramic)) between VDDS2 and VSSX is
required.
This supply domain is monitored by a Low Voltage Detect (LVDS2) circuit.
8.2.9 BCTL— Base Control Pin for external PNP
BCTL is the ballast connection for the on chip voltage regulator . It provides the base current of an external
BJT (PNP) of the VDDX and VDDA supplies. An additional 1K resistor between emitter and base of
the BJT is required.
Figure 8-3 shows an application example for the external BCTL pin.
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Figure 8-3. BCTL application example
8.2.10 BCTLC — Base Control Pin for external PNP for VDDC power
domain
BCTLC is the ballast connection for the on chip voltage regulator for the VDDC power domain. It provides
the base current of an external BJT (PNP) of the VDDC supply. An additional 1K resistor between
emitter and base of the BJT is required.
8.2.11 BCTLS1 — Base Control Pin for external PNP for VDDS1 power
domain
BCTLS1 is the ballast connection for the on chip voltage regulator for the VDDS1 power domain. It
provides the base current of an external BJT (PNP) of the VDDS1 supply. An additional 1K resistor
between emitter and base of the BJT is required.
Figure 8-4 shows an application example for the external BCTLS1 pin.
(reverse battery
MCU
E
C
B
VRBATP
Voltage
Regulator
VDDX
BCTL
protected input voltage)
1K
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Figure 8-4. BCTLS1 application example
8.2.12 BCTLS2 — Base Control Pin for external PNP for VDDS2 power
domain
BCTLS2 is the ballast connection for the on chip voltage regulator for the VDDS2 power domain. It
provides the base current of an external BJT (PNP) of the VDDS2 supply. An additional 1K resistor
between emitter and base of the BJT is required.
8.2.13 SNPS1 — Sense Pin for VDDS1 power domain
SNPS1 is the sense input associated with the VDDS1 power domain regulator . The voltage regulator uses
it to detect a short circuit or over current condition and subsequently limits the current to avoid damage.
RSNPS1 = VSNPSM / (desired max current flowing)
8.2.14 SNPS2 — Sense Pin for VDDS2 power domain
SNPS2 is the sense input associated with the VDDS2 power domain regulator . The voltage regulator uses
it to detect a short circuit or over current condition and subsequently limits the current to avoid damage.
RSNPS2 = VSNPSM / (desired max current flowing)
8.2.15 VSS1,2 — Core Ground Pins
VSS1,2 are the core logic supply return pins. They must be grounded.
(reverse battery
MCU
E
C
B
VRBATP
Voltage
Regulator
SNPS1
BCTLS1
protected input voltage)
VDDS1
1K
VRH1
ADC VRH1EN VSNPSM RSNPS1
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8.2.16 VDD— Core Logic Supply Pin
VDD is the supply domain for the core logic.
An off-chip decoupling capacitor (220 nF(X7R ceramic)) between VDD and VSS is required and can
improve the quality of this supply.
This supply domain is monitored by the Low Voltage Reset circuit and The Power On Reset circuit.
8.2.17 VDDF— NVM Logic Supply Pin
VDDF is the supply domain for the NVM logic.
An off-chip decoupling capacitor (220 nF(X7R ceramic)) between VDDF and VSS is required and can
improve the quality of this supply.
This supply domain is monitored by the Low Voltage Reset circuit.
8.2.18 API_EXTCLK API external clock output pin
This pin provides the signal selected via APIES and is enabled with APIEA bit. See the device
specification if this clock output is available on this device and to which pin it might be connected.
8.2.19 TEMPSENSE — Internal Temperature Sensor Output Voltage
Depending on the VSEL setting either the voltage level generated by the temperature sensor or the VREG
bandgap voltage is driven to a special channel input of the ADC Converter. See device level specification
for connectivity of ADC special channels.
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8.3 Memory Map and Registers
This section provides a detailed description of all registers accessible in the S12CPMU_UHV_V10_V6.
8.3.1 Module Memory Map
The S12CPMU_UHV_V10_V6 registers are shown in Figure 8-5.
Address
Offset
Register
Name Bit 7 6 5 4 3 2 1 Bit 0
0x0000 CPMU
RESERVED00
R0 0 0 0 0 0 0 0
W
0x0001
RESERVED
CPMU
VREGTRIM0
R 0 0 0 0 U U U U
W
0x0002
RESERVED
CPMU
VREGTRIM1
R0 0 UUU000
W
0x0003 CPMURFLG R0 PORF LVRF 0COPRF 0OMRF PMRF
W
0x0004 CPMU
SYNR
RVCOFRQ[1:0] SYNDIV[5:0]
W
0x0005 CPMU
REFDIV
RREFFRQ[1:0] 00 REFDIV[3:0]
W
0x0006 CPMU
POSTDIV
R0 0 0 POSTDIV[4:0]
W
0x0007 CPMUIFLG RRTIF 00
LOCKIF LOCK 0 OSCIF UPOSC
W
0x0008 CPMUINT RRTIE 00
LOCKIE 00
OSCIE 0
W
0x0009 CPMUCLKS RPLLSEL PSTP CSAD COP
OSCSEL1 PRE PCE RTI
OSCSEL
COP
OSCSEL0
W
0x000A CPMUPLL R0 0 FM1 FM0 00 0 0
W
0x000B CPMURTI RRTDEC RTR6 RTR5 RTR4 RTR3 RTR2 RTR1 RTR0
W
0x000C CPMUCOP RWCOP RSBCK 000
CR2 CR1 CR0
W WRTMASK
0x000D RESERVED
CPMUTEST0
R0 0 0 0 0 0 0 0
W
= Unimplemented or Reserved
Figure 8-5. CPMU Register Summary
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0x000E RESERVED
CPMUTEST1
R0 0 0 0 0 0 0 0
W
0x000F CPMU
ARMCOP
R0 0 0 0 0 0 0 0
W Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0x0010 CPMU
HTCTL
RReserved 0VSEL 0HTE HTDS HTIE HTIF
W
0x0011 CPMU
LVCTL
R0 0 0 0 VDDSIE LVDS LVIE LVIF
W
0x0012 CPMU
APICTL
RAPICLK 00
APIES APIEA APIFE APIE APIF
W
0x0013 CPMUACLKTR RACLKTR5 ACLKTR4 ACLKTR3 ACLKTR2 ACLKTR1 ACLKTR0 00
W
0x0014 CPMUAPIRH RAPIR15 APIR14 APIR13 APIR12 APIR11 APIR10 APIR9 APIR8
W
0x0015 CPMUAPIRL RAPIR7 APIR6 APIR5 APIR4 APIR3 APIR2 APIR1 APIR0
W
0x0016 RESERVED
CPMUTEST3
R 0 0 0 0 0 0 0 0
W
0x0017 CPMUHTTR RHTOE 000
HTTR3 HTTR2 HTTR1 HTTR0
W
0x0018 CPMU
IRCTRIMH
RTCTRIM[4:0] 0IRCTRIM[9:8]
W
0x0019 CPMU
IRCTRIML
RIRCTRIM[7:0]
W
0x001A CPMUOSC ROSCE 0000000
W
0x001B CPMUPROT R0 0 0 0 0 0 0 PROT
W
0x001C RESERVED
CPMUTEST2
R000 0 0 0 0 0
W
0x001D CPMU
VREGCTL
RVRH2EN VRH1EN EXTS2ON EXTS1ON 0EXTCON EXTXON INTXON
W
0x001E CPMUOSC2 R0 0 0 0 0 0 OMRE OSCMOD
W
0x001F CPMUVDDS R SCS2 SCS1 L VDS2 LVDS1 SCS2IF SCS1IF LVS2IF LVS1IF
W
Address
Offset
Register
Name Bit 7 6 5 4 3 2 1 Bit 0
= Unimplemented or Reserved
Figure 8-5. CPMU Register Summary
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8.3.2 Register Descriptions
This section describes all the S12CPMU_UHV_V10_V6 registers and their individual bits.
Address order is as listed in Figure 8-5
8.3.2.1 Reserved Register CPMUVREGTRIM0
NOTE
This reserved register is designed for factory test purposes only, and is not
intended for general user access. Writing to this register when in Special
Mode can alter the S12CPMU_UHV_V10_V6’s functionality.
.
Read: Anytime
Write: Only in Special Mode
8.3.2.2 Reserved Register CPMUVREGTRIM1
NOTE
This reserved register is designed for factory test purposes only, and is not
intended for general user access. Writing to this register when in Special
Mode can alter the S12CPMU_UHV_V10_V6’s functionality.
.
Module Base + 0x0001
76543210
R0 0 0 0 U
W
Reset0000FFFF
Power
on Reset 00000000
Note: After de-assert of System Reset a value is automatically loaded from the Flash memory.
Figure 8-6. Reserved Register (CPMUVREGTRIM0)
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Read: Anytime
Write: Only in Special Mode
8.3.2.3 S12CPMU_UHV_V10_V6 Reset Flags Register (CPMURFLG)
This register provides S12CPMU_UHV_V10_V6 reset flags.
Read: Anytime
Write: Refer to each bit for individual write conditions
Module Base + 0x0002
76543210
R0 0UUU0 0 0
W
Reset 0 0 F F F 0 0 0
Power
on Reset 00000000
Note: After de-assert of System Reset a value is automatically loaded from the Flash memory.
Figure 8-7. Reserved Register (CPMUVREGTRIM1)
Module Base + 0x0003
76543210
R0
PORF LVRF
0
COPRF
0
OMRF PMRF
W
Reset 0 Note 1 Note 2 0 Note 3 0 Note 4 Note 5
1. PORF is set to 1 when a power on reset occurs. Unaffected by System Reset.
2. LVRF is set to 1 when a low voltage reset occurs. Unaffected by System Reset. Set by power on reset.
3. COPRF is set to 1 when COP reset occurs. Unaffected by System Reset. Cleared by power on reset.
4. OMRF is set to 1 when an oscillator clock monitor reset occurs. Unaffected by System Reset. Cleared by power on reset.
5. PMRF is set to 1 when a PLL clock monitor reset occurs. Unaffected by System Reset. Cleared by power on reset.
= Unimplemented or Reserved
Figure 8-8. S12CPMU_UHV_V10_V6 Flags Register (CPMURFLG)
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8.3.2.4 S12CPMU_UHV_V10_V6 Synthesizer Register (CPMUSYNR)
The CPMUSYNR register controls the multiplication factor of the PLL and selects the VCO frequency
range.
Read: Anytime
Write: If PROT=0 (CPMUPROT register) and PLLSEL=1 (CPMUCLKS register), then write anytime.
Else write has no effect.
NOTE
Writing to this register clears the LOCK and UPOSC status bits.
Table 8-2. CPMURFLG Field Descriptions
Field Description
6
PORF
Power on Reset Flag PORF is set to 1 when a power on reset occurs. This flag can only be cleared by writing
a 1. Writing a 0 has no effect.
0 Power on reset has not occurred.
1 Power on reset has occurred.
5
LVRF
Low Voltage Reset Flag LVRF is set to 1 when a low voltage reset occurs on the VDD, VDDF or VDDX
domain. This flag can only be cleared by writing a 1. Writing a 0 has no effect.
0 Low voltage reset has not occurred.
1 Low voltage reset has occurred.
3
COPRF
COP Reset Flag COPRF is set to 1 when a COP (Computer Operating Properly) reset occurs. Refer to 8.5.5,
“Computer Operating Properly Watchdog (COP) Reset and 8.3.2.12, “S12CPMU_UHV_V10_V6 COP Control
Register (CPMUCOP) for details.This flag can only be cleared by writing a 1. Writing a 0 has no effect.
0 COP reset has not occurred.
1 COP reset has occurred.
1
OMRF
Oscillator Clock Monitor Reset Flag OMRF is set to 1 when a loss of oscillator (crystal) clock occurs. Refer
to8.5.3, “Oscillator Clock Monitor Reset for details.This flag can only be cleared by writing a 1. Writing a 0 has
no effect.
0 Loss of oscillator clock reset has not occurred.
1 Loss of oscillator clock reset has occurred.
0
PMRF
PLL Clock Monitor Reset Flag PMRF is set to 1 when a loss of PLL clock occurs. This flag can only be
cleared by writing a 1. Writing a 0 has no effect.
0 Loss of PLL clock reset has not occurred.
1 Loss of PLL clock reset has occurred.
Module Base + 0x0004
76543210
R
VCOFRQ[1:0] SYNDIV[5:0]
W
Reset01011000
Figure 8-9. S12CPMU_UHV_V10_V6 Synthesizer Register (CPMUSYNR)
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NOTE
fVCO must be within the specified VCO frequency lock range. Bus
frequency fbus must not exceed the specified maximum.
The VCOFRQ[1:0] bits are used to configure the VCO gain for optimal stability and lock time. For correct
PLL operation the VCOFRQ[1:0] bits have to be selected according to the actual target VCOCLK
frequency as shown in Table 8-3. Setting the VCOFRQ[1:0] bits incorrectly can result in a non functional
PLL (no locking and/or insufficient stability).
8.3.2.5 S12CPMU_UHV_V10_V6 Reference Divider Register (CPMUREFDIV)
The CPMUREFDIV register provides a finer granularity for the PLL multiplier steps when using the
external oscillator as reference.
Read: Anytime
Write: If PROT=0 (CPMUPROT register) and PLLSEL=1 (CPMUCLKS register), then write anytime.
Else write has no effect.
NOTE
Write to this register clears the LOCK and UPOSC status bits.
Table 8-3. VCO Clock Frequency Selection
VCOCLK Frequency Ranges VCOFRQ[1:0]
32MHz <= fVCO <= 48MHz 00
48MHz < fVCO <= 80MHz 01
Reserved 10
80MHz < fVCO<= 100MHz 11
Module Base + 0x0005
76543210
R
REFFRQ[1:0]
00
REFDIV[3:0]
W
Reset00001111
Figure 8-10. S12CPMU_UHV_V10_V6 Reference Divider Register (CPMUREFDIV)
fVCO 2f
REF
SYNDIV 1+=
If PLL has locked (LOCK=1)
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The REFFRQ[1:0] bits are used to configure the internal PLL filter for optimal stability and lock time. For
correct PLL operation the REFFRQ[1:0] bits have to be selected according to the actual REFCLK
frequency as shown in Table 8-4.
If IRC1M is selected as REFCLK (OSCE=0) the PLL filter is fixed configured for the 1MHz <= fREF <=
2MHz range. The bits can still be written but will have no effect on the PLL filter configuration.
For OSCE=1, setting the REFFRQ[1:0] bits incorrectly can result in a non functional PLL (no locking
and/or insufficient stability).
Table 8-4. Reference Clock Frequency Selection if OSC_LCP is enabled
REFCLK Frequency Ranges
(OSCE=1) REFFRQ[1:0]
1MHz <= fREF <= 2MHz 00
2MHz < fREF <= 6MHz 01
6MHz < fREF <= 12MHz 10
fREF >12MHz 11
fREF
fOSC
REFDIV 1+
-------------------------------------
=
If XOSCLCP is enabled (OSCE=1)
If XOSCLCP is disabled (OSCE=0) fREF fIRC1M
=
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8.3.2.6 S12CPMU_UHV_V10_V6 Post Divider Register (CPMUPOSTDIV)
The POSTDIV register controls the frequency ratio between the VCOCLK and the PLLCLK.
Read: Anytime
Write: If PLLSEL=1 write anytime, else write has no effect
When changing the POSTDIV[4:0] value or PLL transitions to locked stated (lock=1), it takes up to 32
Bus Clock cycles until fPLL is at the desired target frequency. This is because the post divider gradually
changes (increases or decreases) fPLL in order to avoid sudden load changes for the on-chip voltage
regulator.
8.3.2.7 S12CPMU_UHV_V10_V6 Interrupt Flags Register (CPMUIFLG)
This register provides S12CPMU_UHV_V10_V6 status bits and interrupt flags.
Module Base + 0x0006
76543210
R0 0 0
POSTDIV[4:0]
W
Reset00000011
= Unimplemented or Reserved
Figure 8-11. S12CPMU_UHV_V10_V6 Post Divider Register (CPMUPOSTDIV)
fPLL
fVCO
POSTDIV 1+
-----------------------------------------
=
If PLL is locked (LOCK=1)
If PLL is not locked (LOCK=0) fPLL
fVCO
4
---------------
=
fbus
fPLL
2
-------------
=
If PLL is selected (PLLSEL=1)
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Read: Anytime
Write: Refer to each bit for individual write conditions
Module Base + 0x0007
76543210
R
RTIF
00
LOCKIF
LOCK 0
OSCIF
UPOSC
W
Reset00000000
= Unimplemented or Reserved
Figure 8-12. S12CPMU_UHV_V10_V6 Flags Register (CPMUIFLG)
Table 8-5. CPMUIFLG Field Descriptions
Field Description
7
RTIF
Real Time Interrupt Flag RTIF is set to 1 at the end of the RTI period. This flag can only be cleared by writing
a 1. Writing a 0 has no effect. If enabled (RTIE=1), RTIF causes an interrupt request.
0 RTI time-out has not yet occurred.
1 RTI time-out has occurred.
4
LOCKIF
PLL Lock Interrupt Flag LOCKIF is set to 1 when LOCK status bit changes. This flag can only be cleared by
writing a 1. Writing a 0 has no effect. If enabled (LOCKIE=1), LOCKIF causes an interrupt request.
0 No change in LOCK bit.
1 LOCK bit has changed.
3
LOCK
Lock Status Bit LOCK reflects the current state of PLL lock condition. Writes have no effect. While PLL is
unlocked (LOCK=0) fPLL is fVCO / 4 to protect the system from high core clock frequencies during the PLL
stabilization time tlock.
0 VCOCLK is not within the desired tolerance of the target frequency.
fPLL = fVCO/4.
1 VCOCLK is within the desired tolerance of the target frequency.
fPLL = fVCO/(POSTDIV+1).
1
OSCIF
Oscillator Interrupt Flag OSCIF is set to 1 when UPOSC status bit changes. This flag can only be cleared
by writing a 1. Writing a 0 has no effect. If enabled (OSCIE=1), OSCIF causes an interrupt request.
0 No change in UPOSC bit.
1 UPOSC bit has changed.
0
UPOSC
Oscillator Status Bit — UPOSC reflects the status of the oscillator. Writes have no effect. Entering Full Stop
Mode UPOSC is cleared.
0 The oscillator is off or oscillation is not qualified by the PLL.
1 The oscillator is qualified by the PLL.
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8.3.2.8 S12CPMU_UHV_V10_V6 Interrupt Enable Register (CPMUINT)
This register enables S12CPMU_UHV_V10_V6 interrupt requests.
Read: Anytime
Write: Anytime
Module Base + 0x0008
76543210
R
RTIE
00
LOCKIE
00
OSCIE
0
W
Reset00000000
= Unimplemented or Reserved
Figure 8-13. S12CPMU_UHV_V10_V6 Interrupt Enable Register (CPMUINT)
Table 8-6. CPMUINT Field Descriptions
Field Description
7
RTIE
Real Time Interrupt Enable Bit
0 Interrupt requests from RTI are disabled.
1 Interrupt will be requested whenever RTIF is set.
4
LOCKIE
PLL Lock Interrupt Enable Bit
0 PLL LOCK interrupt requests are disabled.
1 Interrupt will be requested whenever LOCKIF is set.
1
OSCIE
Oscillator Corrupt Interrupt Enable Bit
0 Oscillator Corrupt interrupt requests are disabled.
1 Interrupt will be requested whenever OSCIF is set.
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8.3.2.9 S12CPMU_UHV_V10_V6 Clock Select Register (CPMUCLKS)
This register controls S12CPMU_UHV_V10_V6 clock selection.
Read: Anytime
Write:
Only possible if PROT=0 (CPMUPROT register) in all MCU Modes (Normal and Special Mode).
All bits in Special Mode (if PROT=0).
PLLSEL, PSTP, PRE, PCE, RTIOSCSEL: In Normal Mode (if PROT=0).
CSAD: In Normal Mode (if PROT=0) until CPMUCOP write once has taken place.
COPOSCSEL0: In Normal Mode (if PROT=0) until CPMUCOP write once has taken place.
If COPOSCSEL0 was cleared by UPOSC=0 (entering Full Stop Mode with COPOSCSEL0=1 or
insufficient OSCCLK quality), then COPOSCSEL0 can be set once again.
COPOSCSEL1: In Normal Mode (if PROT=0) until CPMUCOP write once has taken place.
COPOSCSEL1 will not be cleared by UPOSC=0 (entering Full Stop Mode with COPOSCSEL1=1
or insufficient OSCCLK quality if OSCCLK is used as clock source for other clock domains: for
instance core clock etc.).
NOTE
After writing CPMUCLKS register, it is strongly recommended to read
back CPMUCLKS register to make sure that write of PLLSEL,
RTIOSCSEL and COPOSCSEL was successful. This is because under
certain circumstances writes have no effect or bits are automatically
changed (see CPMUCLKS register and bit descriptions).
NOTE
When using the oscillator clock as system clock (write PLLSEL = 0) it is
highly recommended to enable the oscillator clock monitor reset feature
(write OMRE = 1 in CPMUOSC2 register). If the oscillator monitor reset
feature is disabled (OMRE = 0) and the oscillator clock is used as system
clock, the system will stall in case of loss of oscillation.
Module Base + 0x0009
76543210
R
PLLSEL PSTP CSAD COP
OSCSEL1 PRE PCE RTI
OSCSEL
COP
OSCSEL0
W
Reset10000000
= Unimplemented or Reserved
Figure 8-14. S12CPMU_UHV_V10_V6 Clock Select Register (CPMUCLKS)
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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Table 8-7. CPMUCLKS Descriptions
Field Description
7
PLLSEL
PLL Select Bit
This bit selects the PLLCLK as source of the System Clocks (Core Clock and Bus Clock).
PLLSEL can only be set to 0, if UPOSC=1.
UPOSC= 0 sets the PLLSEL bit.
Entering Full Stop Mode sets the PLLSEL bit.
0 System clocks are derived from OSCCLK if oscillator is up (UPOSC=1, fbus = fosc / 2).
1 System clocks are derived from PLLCLK, fbus = fPLL / 2.
6
PSTP
Pseudo Stop Bit
This bit controls the functionality of the oscillator during Stop Mode.
0 Oscillator is disabled in Stop Mode (Full Stop Mode).
1 Oscillator continues to run in Stop Mode (Pseudo Stop Mode), option to run RTI and COP.
Note: Pseudo Stop Mode allows for faster STOP recovery and reduces the mechanical stress and aging of the
resonator in case of frequent STOP conditions at the expense of a slightly increased power consumption.
Note: When starting up the external oscillator (either by programming OSCE bit to 1 or on exit from Full Stop
Mode with OSCE bit already 1) the software must wait for a minimum time equivalent to the startup-time
of the external oscillator tUPOSC before entering Pseudo Stop Mode.
5
CSAD
COP in Stop Mode ACLK Disable — If this bit is set the ACLK for the COP in Stop Mode is disabled. Hence
the COP is static while in Stop Mode and continues to operate after exit from Stop Mode.
For CSAD = 1 and COP is running on ACLK (COPOSCSEL1 = 1) the following applies:
Due to clock domain crossing synchronization there is a latency time of 2 ACLK cycles to enter Stop Mode.
After exit from STOP mode (when interrupt service routine is entered) the software has to wait for 2 ACLK
cycles before it is allowed to enter Stop mode again (STOP instruction). It is absolutely forbidden to enter
Stop Mode before this time of 2 ACLK cycles has elapsed.
0 COP running in Stop Mode (ACLK for COP enabled in Stop Mode).
1 COP stopped in Stop Mode (ACLK for COP disabled in Stop Mode)
4
COP
OSCSEL1
COP Clock Select 1 — COPOSCSEL0 and COPOSCSEL1 combined determine the clock source to the COP
(see also Tab le 8- 8).
If COPOSCSEL1 = 1, COPOSCSEL0 has no effect regarding clock select and changing the COPOSCSEL0 bit
does not re-start the COP time-out period.
COPOSCSEL1 selects the clock source to the COP to be either ACLK (derived from trimmable internal RC-
Oscillator) or clock selected via COPOSCSEL0 (IRCCLK or OSCCLK).
Changing the COPOSCSEL1 bit re-starts the COP time-out period.
COPOSCSEL1 can be set independent from value of UPOSC.
UPOSC= 0 does not clear the COPOSCSEL1 bit.
0 COP clock source defined by COPOSCSEL0
1 COP clock source is ACLK derived from a trimmable internal RC-Oscillator
3
PRE
RTI Enable During Pseudo Stop Bit — PRE enables the RTI during Pseudo Stop Mode.
0 RTI stops running during Pseudo Stop Mode.
1 RTI continues running during Pseudo Stop Mode if RTIOSCSEL=1.
Note: If PRE=0 or RTIOSCSEL=0 then the RTI will go static while Stop Mode is active. The RTI counter will not
be reset.
2
PCE
COP Enable During Pseudo Stop Bit — PCE enables the COP during Pseudo Stop Mode.
0 COP stops running during Pseudo Stop Mode
1 COP continues running during Pseudo Stop Mode if COPOSCSEL=1
Note: If PCE=0 or COPOSCSEL=0 then the COP will go static while Stop Mode is active. The COP counter will
not be reset.
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Table 8-8. COPOSCSEL1, COPOSCSEL0 clock source select description
1
RTIOSCSEL
RTI Clock SelectRTIOSCSEL selects the clock source to the RTI. Either IRCCLK or OSCCLK. Changing the
RTIOSCSEL bit re-starts the RTI time-out period.
RTIOSCSEL can only be set to 1, if UPOSC=1.
UPOSC= 0 clears the RTIOSCSEL bit.
0 RTI clock source is IRCCLK.
1 RTI clock source is OSCCLK.
0
COP
OSCSEL0
COP Clock Select 0 — COPOSCSEL0 and COPOSCSEL1 combined determine the clock source to the COP
(see also Tab le 8- 8)
If COPOSCSEL1 = 1, COPOSCSEL0 has no effect regarding clock select and changing the COPOSCSEL0 bit
does not re-start the COP time-out period.
When COPOSCSEL1=0,COPOSCSEL0 selects the clock source to the COP to be either IRCCLK or OSCCLK.
Changing the COPOSCSEL0 bit re-starts the COP time-out period.
COPOSCSEL0 can only be set to 1, if UPOSC=1.
UPOSC= 0 clears the COPOSCSEL0 bit.
0 COP clock source is IRCCLK.
1 COP clock source is OSCCLK
COPOSCSEL1 COPOSCSEL0 COP clock source
0 0 IRCCLK
0 1 OSCCLK
1xACLK
Table 8-7. CPMUCLKS Descriptions (continued)
Field Description
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 307
8.3.2.10 S12CPMU_UHV_V10_V6 PLL Control Register (CPMUPLL)
This register controls the PLL functionality.
Read: Anytime
Write: Anytime if PROT=0 (CPMUPROT register) and PLLSEL=1 (CPMUCLKS register). Else write
has no effect.
NOTE
Write to this register clears the LOCK and UPOSC status bits.
NOTE
Care should be taken to ensure that the bus frequency does not exceed the
specified maximum when frequency modulation is enabled.
Module Base + 0x000A
76543210
R0 0
FM1 FM0
0000
W
Reset00000000
Figure 8-15. S12CPMU_UHV_V10_V6 PLL Control Register (CPMUPLL)
Table 8-9. CPMUPLL Field Descriptions
Field Description
5, 4
FM1, FM0
PLL Frequency Modulation Enable Bits FM1 and FM0 enable frequency modulation on the VCOCLK. This
is to reduce noise emission. The modulation frequency is fref divided by 16. See Table 8-10 for coding.
Table 8-10. FM Amplitude selection
FM1 FM0 FM Amplitude /
fVCO Va riation
00FM off
011%
102%
114%
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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308 Freescale Semiconductor
8.3.2.11 S12CPMU_UHV_V10_V6 RTI Control Register (CPMURTI)
This register selects the time-out period for the Real Time Interrupt.
The clock source for the RTI is either IRCCLK or OSCCLK depending on the setting of the RTIOSCSEL
bit. In Stop Mode with PSTP=1 (Pseudo Stop Mode) and RTIOSCSEL=1 the RTI continues to run, else
the RTI counter halts in Stop Mode.
Read: Anytime
Write: Anytime
NOTE
A write to this register starts the RTI time-out period. A change of the
RTIOSCSEL bit (writing a different value or loosing UPOSC status) re-
starts the RTI time-out period.
Module Base + 0x000B
76543210
R
RTDEC RTR6 RTR5 RTR4 RTR3 RTR2 RTR1 RTR0
W
Reset00000000
Figure 8-16. S12CPMU_UHV_V10_V6 RTI Control Register (CPMURTI)
Table 8-11. CPMURTI Field Descriptions
Field Description
7
RTDEC
Decimal or Binary Divider Select Bit — RTDEC selects decimal or binary based prescaler values.
0 Binary based divider value. See Table 8-12
1 Decimal based divider value. See Tab le 8 -13
6–4
RTR[6:4]
Real Time Interrupt Prescale Rate Select Bits — These bits select the prescale rate for the RTI.See Tabl e 8-
12 and Ta bl e 8- 1 3 .
3–0
RTR[3:0]
Real Time Interrupt Modulus Counter Select Bits — These bits select the modulus counter target value to
provide additional granularity.Tab le 8- 12 and Table 8-13 show all possible divide values selectable by the
CPMURTI register.
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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Table 8-12. RTI Frequency Divide Rates for RTDEC = 0
RTR[3:0]
RTR[6:4] =
000
(OFF)
001
(210)
010
(211)
011
(212)
100
(213)
101
(214)
110
(215)
111
(216)
0000 (1) OFF(1)
1. Denotes the default value out of reset.This value should be used to disable the RTI to ensure future backwards compatibility.
210 211 212 213 214 215 216
0001 (2) OFF 2x210 2x211 2x212 2x213 2x214 2x215 2x216
0010 (3) OFF 3x210 3x211 3x212 3x213 3x214 3x215 3x216
0011 (4) OFF 4x210 4x211 4x212 4x213 4x214 4x215 4x216
0100 (5) OFF 5x210 5x211 5x212 5x213 5x214 5x215 5x216
0101 (6) OFF 6x210 6x211 6x212 6x213 6x214 6x215 6x216
0110 (7) OFF 7x210 7x211 7x212 7x213 7x214 7x215 7x216
0111 (8) OFF 8x210 8x211 8x212 8x213 8x214 8x215 8x216
1000 (9) OFF 9x210 9x211 9x212 9x213 9x214 9x215 9x216
1001 (10) OFF 10x210 10x211 10x212 10x213 10x214 10x215 10x216
1010 (11) OFF 11x210 11x211 11x212 11x213 11x214 11x215 11x216
1011 (12) OFF 12x210 12x211 12x212 12x213 12x214 12x215 12x216
1100 (13) OFF 13x210 13x211 13x212 13x213 13x214 13x215 13x216
1101 (14) OFF 14x210 14x211 14x212 14x213 14x214 14x215 14x216
1110 (15) OFF 15x210 15x211 15x212 15x213 15x214 15x215 15x216
1111 ( 16) OFF 16x210 16x211 16x212 16x213 16x214 16x215 16x216
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Table 8-13. RTI Frequency Divide Rates for RTDEC=1
RTR[3:0]
RTR[6:4] =
000
(1x103)
001
(2x103)
010
(5x103)
011
(10x103)
100
(20x103)
101
(50x103)
110
(100x103)
111
(200x103)
0000 (1) 1x1032x1035x10310x10320x10350x103100x103200x103
0001 (2) 2x1034x10310x10320x10340x103100x103200x103400x103
0010 (3) 3x1036x10315x10330x10360x103150x103300x103600x103
0011 (4) 4x1038x10320x10340x10380x103200x103400x103800x103
0100 (5) 5x10310x10325x10350x103100x103250x103500x1031x106
0101 (6) 6x10312x10330x10360x103120x103300x103600x1031.2x106
0110 (7) 7x10314x10335x10370x103140x103350x103700x1031.4x106
0111 (8) 8x10316x10340x10380x103160x103400x103800x1031.6x106
1000 (9) 9x10318x10345x10390x103180x103450x103900x1031.8x106
1001 (10) 10 x10320x10350x103100x103200x103500x1031x1062x106
1010 (11) 11 x10322x10355x103110x103220x103550x1031.1x1062.2x106
1011 (12) 12x10324x10360x103120x103240x103600x1031.2x1062.4x106
1100 (13) 13x10326x10365x103130x103260x103650x1031.3x1062.6x106
1101 (14) 14x10328x10370x103140x103280x103700x1031.4x1062.8x106
1110 (15) 15x10330x10375x103150x103300x103750x1031.5x1063x106
1111 ( 16) 16x10332x10380x103160x103320x103800x1031.6x1063.2x106
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8.3.2.12 S12CPMU_UHV_V10_V6 COP Control Register (CPMUCOP)
This register controls the COP (Computer Operating Properly) watchdog.
The clock source for the COP is either ACLK, IRCCLK or OSCCLK depending on the setting of the
COPOSCSEL0 and COPOSCSEL1 bit (see also Table 8-8).
In S top Mode with PSTP=1 (Pseudo Stop Mode), COPOSCSEL0=1 and COPOSCEL1=0 and PCE=1 the
COP continues to run, else the COP counter halts in Stop Mode with COPOSCSEL1 =0.
In Full Stop Mode and Pseudo Stop Mode with COPOSCSEL1=1 the COP continues to run.
Read: Anytime
Write:
1. RSBCK: Anytime in Special Mode; write to “1” but not to “0” in Normal Mode
2. WCOP, CR2, CR1, CR0:
Anytime in Special Mode, when WRTMASK is 0, otherwise it has no effect
Write once in Normal Mode, when WRTMASK is 0, otherwise it has no effect.
Writing CR[2:0] to “000” has no effect, but counts for the “write once” condition.
Writing WCOP to “0” has no effect, but counts for the “write once” condition.
When a non-zero value is loaded from Flash to CR[2:0] the COP time-out period is started.
A change of the COPOSCSEL0 or COPOSCSEL1 bit (writing a different value) or loosing UPOSC status
while COPOSCSEL1 is clear and COPOSCSEL0 is set, re-starts the COP time-out period.
In Normal Mode the COP time-out period is restarted if either of these conditions is true:
1. Writing a non-zero value to CR[2:0] (anytime in special mode, once in normal mode) with
WRTMASK = 0.
2. Writing WCOP bit (anytime in Special Mode, once in Normal Mode) with WRTMASK = 0.
3. Changing RSBCK bit from “0” to “1”.
In Special Mode, any write access to CPMUCOP register restarts the COP time-out period.
Module Base + 0x000C
76543210
R
WCOP RSBCK
000
CR2 CR1 CR0
W WRTMASK
ResetF0000FFF
After de-assert of System Reset the values are automatically loaded from the Flash memory. See Device specification for
details.
= Unimplemented or Reserved
Figure 8-17. S12CPMU_UHV_V10_V6 COP Control Register (CPMUCOP)
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Table 8-14. CPMUCOP Field Descriptions
Field Description
7
WCOP
Window COP Mode Bit — When set, a write to the CPMUARMCOP register must occur in the last 25% of the
selected period. A write during the first 75% of the selected period generates a COP reset. As long as all writes
occur during this window, $55 can be written as often as desired. Once $AA is written after the $55, the time-out
logic restarts and the user must wait until the next window before writing to CPMUARMCOP. Table 8-15 shows
the duration of this window for the seven available COP rates.
0 Normal COP operation
1 Window COP operation
6
RSBCK
COP and RTI Stop in Active BDM Mode Bit
0 Allows the COP and RTI to keep running in Active BDM mode.
1 Stops the COP and RTI counters whenever the part is in Active BDM mode.
5
WRTMASK
Write Mask for WCOP and CR[2:0] Bit This write-only bit serves as a mask for the WCOP and CR[2:0] bits
while writing the CPMUCOP register. It is intended for BDM writing the RSBCK without changing the content of
WCOP and CR[2:0].
0 Write of WCOP and CR[2:0] has an effect with this write of CPMUCOP
1 Write of WCOP and CR[2:0] has no effect with this write of CPMUCOP.
(Does not count for “write once”.)
2–0
CR[2:0]
COP Watchdog Timer Rate SelectThese bits select the COP time-out rate (see Ta bl e 8 -1 5 and Tab le 8- 16 ).
Writing a nonzero value to CR[2:0] enables the COP counter and starts the time-out period. A COP counter time-
out causes a System Reset. This can be avoided by periodically (before time-out) initializing the COP counter
via the CPMUARMCOP register.
While all of the following four conditions are true the CR[2:0], WCOP bits are ignored and the COP operates at
highest time-out period (2 24 cycles) in normal COP mode (Window COP mode disabled):
1) COP is enabled (CR[2:0] is not 000)
2) BDM mode active
3) RSBCK = 0
4) Operation in Special Mode
Table 8-15. COP Watchdog Rates if COPOSCSEL1=0.
(default out of reset)
CR2 CR1 CR0
COPCLK
Cycles to time-out
(COPCLK is either IRCCLK or
OSCCLK depending on the
COPOSCSEL0 bit)
0 0 0 COP disabled
001 2
14
010 2
16
011 2
18
100 2
20
101 2
22
110 2
23
111 2
24
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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Table 8-16. COP Watchdog Rates if COPOSCSEL1=1.
CR2 CR1 CR0
COPCLK
Cycles to time-out
(COPCLK is ACLK divided by 2)
0 0 0 COP disabled
001 2
7
010 2
9
011 2
11
100 2
13
101 2
15
110 2
16
111 2
17
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314 Freescale Semiconductor
8.3.2.13 Reserved Register CPMUTEST0
NOTE
This reserved register is designed for factory test purposes only, and is not
intended for general user access. Writing to this register when in Special
Mode can alter the S12CPMU_UHV_V10_V6’s functionality.
Read: Anytime
Write: Only in Special Mode
8.3.2.14 Reserved Register CPMUTEST1
NOTE
This reserved register is designed for factory test purposes only, and is not
intended for general user access. Writing to this register when in Special
Mode can alter the S12CPMU_UHV_V10_V6’s functionality.
Read: Anytime
Write: Only in Special Mode
Module Base + 0x000D
76543210
R00000000
W
Reset00000000
= Unimplemented or Reserved
Figure 8-18. Reserved Register (CPMUTEST0)
Module Base + 0x000E
76543210
R00000000
W
Reset00000000
= Unimplemented or Reserved
Figure 8-19. Reserved Register (CPMUTEST1)
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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8.3.2.15 S12CPMU_UHV_V10_V6 COP Timer Arm/Reset Register
(CPMUARMCOP)
This register is used to restart the COP time-out period.
Read: Always reads $00
Write: Anytime
When the COP is disabled (CR[2:0] = “000”) writing to this register has no effect.
When the COP is enabled by setting CR[2:0] nonzero, the following applies:
Writing any value other than $55 or $AA causes a COP reset. To restart the COP time-out period
write $55 followed by a write of $AA. These writes do not need to occur back-to-back, but the
sequence ($55, $AA) must be completed prior to COP end of time-out period to avoid a COP reset.
Sequences of $55 writes are allowed. When the WCOP bit is set, $55 and $AA writes must be done
in the last 25% of the selected time-out period; writing any value in the first 75% of the selected
period will cause a COP reset.
8.3.2.16 High Temperature Control Register (CPMUHTCTL)
The CPMUHTCTL register configures the temperature sense features.
Read: Anytime
Write: VSEL, HTE, HTIE and HTIF are write anytime, HTDS is read only
Module Base + 0x000F
76543210
R00000000
W ARMCOP-Bit
7
ARMCOP-Bit
6
ARMCOP-Bit
5
ARMCOP-Bit
4
ARMCOP-Bit
3
ARMCOP-Bit
2
ARMCOP-Bit
1
ARMCOP-Bit
0
Reset00000000
Figure 8-20. S12CPMU_UHV_V10_V6 CPMUARMCOP Register
Module Base + 0x0010
76543210
RReserved 0VSEL 0HTE HTDS HTIE HTIF
W
Reset00000000
= Unimplemented or Reserved
Figure 8-21. High Temperature Control Register (CPMUHTCTL)
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NOTE
The voltage at the temperature sensor can be computed as follows:
VHT(temp) = VHT(150) - (150 - temp) * dVHT
Figure 8-22. Voltage Access Select
Table 8-17. CPMUHTCTL Field Descriptions
Field Description
5
VSEL
Voltage Access Select Bit — If set, the bandgap reference voltage VBG can be accessed internally (i.e.
multiplexed to an internal Analog to Digital Converter channel). If not set, the die temperature proportional
voltage VHT of the temperature sensor can be accessed internally. See device level specification for connectivity.
For any of these access the HTE bit must be set.
0 An internal temperature proportional voltage VHT can be accessed internally.
1 Bandgap reference voltage VBG can be accessed internally.
3
HTE
High Temperature Sensor/Bandgap Voltage Enable BitThis bit enables the high temperature sensor and
bandgap voltage amplifier.
0 The temperature sensor and bandgap voltage amplifier is disabled.
1 The temperature sensor and bandgap voltage amplifier is enabled.
2
HTDS
High Temperature Detect Status Bit — This read-only status bit reflects the temperature status. Writes have
no effect.
0 Junction Temperature is below level THTID or RPM.
1 Junction Temperature is above level THTIA and FPM.
1
HTIE
High Temperature Interrupt Enable Bit
0 Interrupt request is disabled.
1 Interrupt will be requested whenever HTIF is set.
0
HTIF
High Temperature Interrupt Flag — HTIF is set to 1 when HTDS status bit changes. This flag can only be
cleared by writing a 1.
Writing a 0 has no effect. If enabled (HTIE=1), HTIF causes an interrupt request.
0 No change in HTDS bit.
1 HTDS bit has changed.
C
HTD
VBG
ADC
Ref
Channel
VSEL TEMPSENSE
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8.3.2.17 Low Voltage Control Register (CPMULVCTL)
The CPMULVCTL register allows the configuration of the low-voltage detect features.
Read: Anytime
Write: LVIE and LVIF are write anytime, LVDS is read only
Module Base + 0x0011
76543210
R0 0 0 0 VDDSIE(1)
1. Only available in V10
LVDS LVIE LVIF
W
Reset00000U0U
The Reset state of LVDS and LVIF depends on the external supplied VDDA level
= Unimplemented or Reserved
Figure 8-23. Low Voltage Control Register (CPMULVCTL)
Table 8-18. CPMULVCTL Field Descriptions
Field Description
3
VDDSIE
VDDS Integrity Interrupt Enable Bit
0 Interrupt request is disabled.
1 Interrupt will be requested on VDDS integrity fails, that means whenever one of the following flags in
CPMUVDDS register is set: SCS2IF, SCS1IF, LVS2IF, LVS1IF.
2
LVDS
Low-Voltage Detect Status Bit — This read-only status bit reflects the voltage level on VDDA. Writes have no
effect.
0 Input voltage VDDA is above level VLVID or RPM.
1 Input voltage VDDA is below level VLVIA and FPM.
1
LVIE
Low-Voltage Interrupt Enable Bit
0 Interrupt request is disabled.
1 Interrupt will be requested whenever LVIF is set.
0
LVIF
Low-Voltage Interrupt Flag LVIF is set to 1 when LVDS status bit changes. This flag can only be cleared by
writing a 1. Writing a 0 has no effect. If enabled (LVIE = 1), LVIF causes an interrupt request.
0 No change in LVDS bit.
1 LVDS bit has changed.
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8.3.2.18 Autonomous Periodical Interrupt Control Register (CPMUAPICTL)
The CPMUAPICTL register allows the configuration of the autonomous periodical interrupt features.
Read: Anytime
Write: Anytime
Module Base + 0x0012
76543210
RAPICLK 00
APIES APIEA APIFE APIE APIF
W
Reset00000000
= Unimplemented or Reserved
Figure 8-24. Autonomous Periodical Interrupt Control Register (CPMUAPICTL)
Table 8-19. CPMUAPICTL Field Descriptions
Field Description
7
APICLK
Autonomous Periodical Interrupt Clock Select Bit — Selects the clock source for the API. Writable only if
APIFE = 0. APICLK cannot be changed if APIFE is set by the same write operation.
0 Autonomous Clock (ACLK) used as source.
1 Bus Clock used as source.
4
APIES
Autonomous Periodical Interrupt External Select Bit — Selects the waveform at the external pin
API_EXTCLK as shown in Figure 8-25. See device level specification for connectivity of API_EXTCLK pin.
0 If APIEA and APIFE are set, at the external pin API_EXTCLK periodic high pulses are visible at the end of
every selected period with the size of half of the minimum period (APIR=0x0000 in Tab le 8- 23 ).
1 If APIEA and APIFE are set, at the external pin API_EXTCLK a clock is visible with 2 times the selected API
Period.
3
APIEA
Autonomous Periodical Interrupt External Access Enable Bit If set, the waveform selected by bit APIES
can be accessed externally. See device level specification for connectivity.
0 Waveform selected by APIES can not be accessed externally.
1 Waveform selected by APIES can be accessed externally, if APIFE is set.
2
APIFE
Autonomous Periodical Interrupt Feature Enable Bit — Enables the API feature and starts the API timer
when set.
0 Autonomous periodical interrupt is disabled.
1 Autonomous periodical interrupt is enabled and timer starts running.
1
APIE
Autonomous Periodical Interrupt Enable Bit
0 API interrupt request is disabled.
1 API interrupt will be requested whenever APIF is set.
0
APIF
Autonomous Periodical Interrupt Flag — APIF is set to 1 when the in the API configured time has elapsed.
This flag can only be cleared by writing a 1.Writing a 0 has no effect. If enabled (APIE = 1), APIF causes an
interrupt request.
0 API time-out has not yet occurred.
1 API time-out has occurred.
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Figure 8-25. Waveform selected on API_EXTCLK pin (APIEA=1, APIFE=1)
APIES=0
APIES=1
API period
API min. period / 2
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8.3.2.19 Autonomous Clock Trimming Register (CPMUACLKTR)
The CPMUACLKTR register configures the trimming of the Autonomous Clock (ACLK - trimmable
internal RC-Oscillator) which can be selected as clock source for some CPMU features.
Read: Anytime
Write: Anytime
Module Base + 0x0013
76543210
RACLKTR5 ACLKTR4 ACLKTR3 ACLKTR2 ACLKTR1 ACLKTR0 00
W
ResetFFFFFF00
After de-assert of System Reset a value is automatically loaded from the Flash memory.
Figure 8-26. Autonomous Clock Trimming Register (CPMUACLKTR)
Table 8-20. CPMUACLKTR Field Descriptions
Field Description
7–2
ACLKTR[5:0]
Autonomous Clock Period Trimming Bits — See Ta bl e 8-2 1 for trimming effects. The ACLKTR[5:0] value
represents a signed number influencing the ACLK period time.
Table 8-21. Trimming Effect of ACLKTR[5:0]
ACLKTR[5:0] Decimal ACLK frequency
100000 -32 lowest
100001 -31
increasing
....
111111 -1
000000 0 mid
000001 +1
increasing
....
011110 +30
011111 +31 highest
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8.3.2.20 Autonomous Periodical Interrupt Rate High and Low Register
(CPMUAPIRH / CPMUAPIRL)
The CPMUAPIRH and CPMUAPIRL registers allow the configuration of the autonomous periodical
interrupt rate.
Read: Anytime
Write: Anytime if APIFE=0, Else writes have no effect.
The period can be calculated as follows depending on logical value of the APICLK bit:
APICLK=0: Period = 2*(APIR[15:0] + 1) * (ACLK Clock Period * 2)
APICLK=1: Period = 2*(APIR[15:0] + 1) * Bus Clock Period
NOTE
For APICLK bit clear the first time-out period of the API will show a
latency time between two to three fACLK cycles due to synchronous clock
gate release when the API feature gets enabled (APIFE bit set).
Module Base + 0x0014
76543210
RAPIR15 APIR14 APIR13 APIR12 APIR11 APIR10 APIR9 APIR8
W
Reset00000000
= Unimplemented or Reserved
Figure 8-27. Autonomous Periodical Interrupt Rate High Register (CPMUAPIRH)
Module Base + 0x0015
76543210
RAPIR7 APIR6 APIR5 APIR4 APIR3 APIR2 APIR1 APIR0
W
Reset00000000
Figure 8-28. Autonomous Periodical Interrupt Rate Low Register (CPMUAPIRL)
Table 8-22. CPMUAPIRH / CPMUAPIRL Field Descriptions
Field Description
15-0
APIR[15:0]
Autonomous Periodical Interrupt Rate Bits — These bits define the time-out period of the API. See Tab le 8 -
23 for details of the effect of the autonomous periodical interrupt rate bits.
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Table 8-23. Selectable Autonomous Periodical Interrupt Periods
APICLK APIR[15:0] Selected Period
0 0000 0.2 ms(1)
1. When fACLK is trimmed to 20KHz.
0 0001 0.4 ms1
0 0002 0.6 ms1
0 0003 0.8 ms1
0 0004 1.0 ms1
0 0005 1.2 ms1
0 ..... .....
0 FFFD 13106.8 ms1
0 FFFE 13107.0 ms1
0 FFFF 13107.2 ms1
1 0000 2 * Bus Clock period
1 0001 4 * Bus Clock period
1 0002 6 * Bus Clock period
1 0003 8 * Bus Clock period
1 0004 10 * Bus Clock period
1 0005 12 * Bus Clock period
1 ..... .....
1 FFFD 131068 * Bus Clock period
1 FFFE 131070 * Bus Clock period
1 FFFF 131072 * Bus Clock period
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8.3.2.21 Reserved Register CPMUTEST3
NOTE
This reserved register is designed for factory test purposes only, and is not
intended for general user access. Writing to this register when in Special
Mode can alter the S12CPMU_UHV_V10_V6’s functionality.
Read: Anytime
Write: Only in Special Mode
Module Base + 0x0016
76543210
R00000000
W
Reset00000000
= Unimplemented or Reserved
Figure 8-29. Reserved Register (CPMUTEST3)
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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324 Freescale Semiconductor
8.3.2.22 High Temperature Trimming Register (CPMUHTTR)
The CPMUHTTR register configures the trimming of the S12CPMU_UHV_V10_V6 temperature sense.
Read: Anytime
Write: Anytime
Module Base + 0x0017
76543210
RHTOE 000
HTTR3 HTTR2 HTTR1 HTTR0
W
Reset0000FFFF
After de-assert of System Reset a trim value is automatically loaded from the Flash memory. See Device specification for
details.
= Unimplemented or Reserved
Figure 8-30. High Temperature Trimming Register (CPMUHTTR)
Table 8-25. CPMUHTTR Field Descriptions
Field Description
7
HTOE
High Temperature Offset Enable Bit — If set the temperature sense offset is enabled.
0 The temperature sense offset is disabled. HTTR[3:0] bits don’t care.
1 The temperature sense offset is enabled. HTTR[3:0] select the temperature offset.
3–0
HTTR[3:0]
High Temperature Trimming Bits — See Tabl e 8 -2 6 for trimming effects.
Table 8-26. Trimming Effect of HTTR
HTTR[3:0] Temperature
sensor voltage VHT
Interrupt threshold
temperatures THTIA and THTID
0000 lowest highest
0001
increasing decreasing
....
1110
1111 highest lowest
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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Freescale Semiconductor 325
8.3.2.23 S12CPMU_UHV_V10_V6 IRC1M Trim Registers (CPMUIRCTRIMH /
CPMUIRCTRIML)
Read: Anytime
Write: Anytime if PROT=0 (CPMUPROT register). Else write has no effect
NOTE
Writes to these registers while PLLSEL=1 clears the LOCK and UPOSC
status bits.
Module Base + 0x0018
1 5 14 13 12 11 10 9 8
R
TCTRIM[4:0]
0
IRCTRIM[9:8]
W
ResetFFFFF0FF
After de-assert of System Reset a factory programmed trim value is automatically loaded from the Flash memory to
provide trimmed Internal Reference Frequency fIRC1M_TRIM.
Figure 8-31. S12CPMU_UHV_V10_V6 IRC1M Trim High Register (CPMUIRCTRIMH)
Module Base + 0x0019
76543210
R
IRCTRIM[7:0]
W
ResetFFFFFFFF
After de-assert of System Reset a factory programmed trim value is automatically loaded from the Flash memory to
provide trimmed Internal Reference Frequency fIRC1M_TRIM.
Figure 8-32. S12CPMU_UHV_V10_V6 IRC1M Trim Low Register (CPMUIRCTRIML)
Table 8-27. CPMUIRCTRIMH/L Field Descriptions
Field Description
15-11
TCTRIM[4:0]
IRC1M temperature coefficient Trim Bits
Trim bits for the Temperature Coefficient (TC) of the IRC1M frequency.
Table 8-28 shows the influence of the bits TCTRIM[4:0] on the relationship between frequency and temperature.
Figure 8-34 shows an approximate TC variation, relative to the nominal TC of the IRC1M (i.e. for
TCTRIM[4:0]=0x00000 or 0x10000).
9-0
IRCTRIM[9:0]
IRC1M Frequency Trim Bits — Trim bits for Internal Reference Clock
After System Reset the factory programmed trim value is automatically loaded into these registers, resulting in a
Internal Reference Frequency fIRC1M_TRIM.See device electrical characteristics for value of fIRC1M_TRIM.
The frequency trimming consists of two different trimming methods:
A rough trimming controlled by bits IRCTRIM[9:6] can be done with frequency leaps of about 6% in average.
A fine trimming controlled by bits IRCTRIM[5:0] can be done with frequency leaps of about 0.3% (this trimming
determines the precision of the frequency setting of 0.15%, i.e. 0.3% is the distance between two trimming
values).
Figure 8-33 shows the relationship between the trim bits and the resulting IRC1M frequency.
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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326 Freescale Semiconductor
Figure 8-33. IRC1M Frequency Trimming Diagram
IRCTRIM[9:0]
$000
IRCTRIM[9:6]
IRCTRIM[5:0]
IRC1M frequency (IRCCLK)
600KHz
1.5MHz
1MHz
$3FF
......
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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Freescale Semiconductor 327
Figure 8-34. Influence of TCTRIM[4:0] on the Temperature Coefficient
NOTE
The frequency is not necessarily linear with the temperature (in most cases
it will not be). The above diagram is meant only to give the direction
(positive or negative) of the variation of the TC, relative to the nominal TC.
Setting TCTRIM[4:0] at 0x00000 or 0x10000 does not mean that the
temperature coefficient will be zero. These two combinations basically
switch off the TC compensation module, which results in the nominal TC of
the IRC1M.
frequency
temperature
TCTRIM[4:0] = 0x11111
TCTRIM[4:0] = 0x01111
- 40C 150C
TCTRIM[4:0] = 0x10000 or 0x00000 (nominal TC)
0x00001
0x00010
0x00011
0x00100
0x00101
...
0x01111
0x11111
...
0x10101
0x10100
0x10011
0x10010
0x10001
TC increases
TC decreases
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
MC9S12ZVM Family Reference Manual Rev. 2.2
328 Freescale Semiconductor
Table 8-28. TC trimming of the frequency of the IRC1M at ambient temperature
NOTE
Since the IRC1M frequency is not a linear function of the temperature, but
more like a parabola, the above relative variation is only an indication and
should be considered with care.
TCTRIM[4:0] IRC1M Indicative
relative TC variation
IRC1M indicative frequency drift for relative
TC variation
00000 0 (nominal TC of the IRC) 0%
00001 -0.27% -0.5%
00010 -0.54% -0.9%
00011 -0.81% -1.3%
00100 -1.08% -1.7%
00101 -1.35% -2.0%
00110 -1.63% -2.2%
00111 -1.9% -2.5%
01000 -2.20% -3.0%
01001 -2.47% -3.4%
01010 -2.77% -3.9%
01011 -3.04 -4.3%
01100 -3.33% -4.7%
01101 -3.6% -5.1%
01110 -3.91% -5.6%
01111 -4.18% -5.9%
10000 0 (nominal TC of the IRC) 0%
10001 +0.27% +0.5%
10010 +0.54% +0.9%
10011 +0.81% +1.3%
10100 +1.07% +1.7%
10101 +1.34% +2.0%
10110 +1.59% +2.2%
10111 +1.86% +2.5%
11000 +2.11% +3.0%
11001 +2.38% +3.4%
11010 +2.62% +3.9%
11011 +2.89% +4.3%
11100 +3.12% +4.7%
11101 +3.39% +5.1%
11110 +3.62% +5.6%
11111 +3.89% +5.9%
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 329
Be aware that the output frequency varies with the TC trimming. A
frequency trimming correction is therefore necessary. The values provided
in Table 8-28 are typical values at ambient temperature which can vary from
device to device.
8.3.2.24 S12CPMU_UHV_V10_V6 Oscillator Register (CPMUOSC)
This registers configures the external oscillator (XOSCLCP).
Read: Anytime
Write: Anytime if PROT=0 (CPMUPROT register) and PLLSEL=1 (CPMUCLKS register). Else write
has no effect.
NOTE.
Write to this register clears the LOCK and UPOSC status bits.
Module Base + 0x001A
76543210
R
OSCE
0000000
W
Reset00000000
= Unimplemented or Reserved
Figure 8-35. S12CPMU_UHV_V10_V6 Oscillator Register (CPMUOSC)
Table 8-29. CPMUOSC Field Descriptions
Field Description
7
OSCE
Oscillator Enable Bit — This bit enables the external oscillator (XOSCLCP). The UPOSC status bit in the
CPMIUFLG register indicates when the oscillation is stable and when OSCCLK can be selected as source of the
Bus Clock or source of the COP or RTI.If the oscillator clock monitor reset is enabled (OMRE = 1 in
CPMUOSC2 register), then a loss of oscillation will lead to an oscillator clock monitor reset.
0 External oscillator is disabled.
REFCLK for PLL is IRCCLK.
1 External oscillator is enabled.
Oscillator clock monitor is enabled.
External oscillator is qualified by PLLCLK.
REFCLK for PLL is the external oscillator clock divided by REFDIV.
If OSCE bit has been set (write “1”) the EXTAL and XTAL pins are exclusively reserved for the oscillator
and they can not be used anymore as general purpose I/O until the next system reset.
Note: When starting up the external oscillator (either by programming OSCE bit to 1 or on exit from Full Stop
Mode with OSCE bit already 1) the software must wait for a minimum time equivalent to the startup-time
of the external oscillator tUPOSC before entering Pseudo Stop Mode.
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330 Freescale Semiconductor
8.3.2.25 S12CPMU_UHV_V10_V6 Protection Register (CPMUPROT)
This register protects the clock configuration registers from accidental overwrite:
CPMUSYNR, CPMUREFDIV, CPMUCLKS, CPMUPLL, CPMUIRCTRIMH/L, CPMUOSC and
CPMUOSC2
Read: Anytime
Write: Anytime
Module Base + 0x001B
76543210
R0000000
PROT
W
Reset00000000
Figure 8-36. S12CPMU_UHV_V10_V6 Protection Register (CPMUPROT)
Field Description
PROT Clock Configuration Registers Protection Bit — This bit protects the clock configuration registers from
accidental overwrite (see list of protected registers above): Writing 0x26 to the CPMUPROT register clears the
PROT bit, other write accesses set the PROT bit.
0 Protection of clock configuration registers is disabled.
1 Protection of clock configuration registers is enabled. (see list of protected registers above).
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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Freescale Semiconductor 331
8.3.2.26 Reserved Register CPMUTEST2
NOTE
This reserved register is designed for factory test purposes only, and is not
intended for general user access. Writing to this register when in Special
Mode can alter the S12CPMU_UHV_V10_V6’s functionality.
Read: Anytime
Write: Only in Special Mode
Module Base + 0x001C
76543210
R000 0 0 0 0 0
W
Reset00000000
= Unimplemented or Reserved
Figure 8-37. Reserved Register CPMUTEST2
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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332 Freescale Semiconductor
8.3.2.27 Voltage Regulator Control Register (CPMUVREGCTL)
The CPMUVREGCTL allows to enable or disable certain parts of the voltage regulator.This register must
be configured after system startup.
Read: Anytime
Write: VRH2EN, VRH1EN, EXTS2ON, EXTS1ON anytime
Write: EXTCON, EXTXON, INTXON once in normal modes, anytime in special modes
Module Base + 0x001D
76543210
RVRH2EN1VRH1EN1EXTS2ON1EXTS1ON(1)
1. Only available in V10
0EXTCON EXTXON INTXON
W
Reset00000111
= Unimplemented or Reserved
Figure 8-38. Voltage Regulator Control Register (CPMUVREGCTL)
Table 8-30. Effects of writing the EXTXON and INTXON bits
value of
EXTXON
to be written
value of
INTXON
to be written
Write Access
0 0 blocked, no effect
0 1 legal access
1 0 legal access
1 1 blocked, no effect
Table 8-31. CPMUVREGCTL Field Descriptions
Field Description
7
VRH2EN
VRH2 Enable Bit — This bits switches VDDS2 pin to VRH2 of ADC.
0 VRH2 of ADC disconnected (open)
1 VRH2 of ADC connected to VDDS2.
In RPM VRH2 is always disconnected from VDDS2 regardless of the value of the VRH2EN bit.
6
VRH1EN
VRH1 Enable Bit — This bits switches VDDS1 pin to VRH1 of ADC.
0 VRH1 of ADC disconnected (open)
1 VRH1 of ADC connected to VDDS1.
In RPM VRH1 is always disconnected from VDDS1 regardless of the value of the VRH1EN bit.
5
EXTS2ON
External voltage regulator Enable Bit for VDDS2 domainShould be enabled after system startup if VDDS2
is used.
0 VDDS2 domain disabled
1 VDDS2 domain enabled. BCTLS2 pin is active.
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8.3.2.28 S12CPMU_UHV_V10_V6 Oscillator Register 2 (CPMUOSC2)
This registers configures the external oscillator (XOSCLCP).
Read: Anytime
Write: Anytime if PROT=0 (CPMUPROT register) and PLLSEL=1 (CPMUCLKS register). Else write
has no effect.
4
EXTS1ON
External voltage regulator Enable Bit for VDDS1 domainShould be enabled after system startup if VDDS1
is used.
0 VDDS1 domain disabled
1 VDDS1 domain enabled. BCTLS1 pin is active.
2
EXTCON
External voltage regulator Enable Bit for VDDC domain Should be disabled after system startup if VDDC
domain is not used.
0 VDDC domain disabled
1 VDDC domain enabled. BCTLC pin is active.
1
EXTXON
External voltage regulator Enable Bit for VDDX domain — Should be set to 1 if external BJT is present on
the PCB, cleared otherwise.
0 VDDX control loop does not use external BJT
1 VDDX control loop uses external BJT
0
INTXON
Internal voltage regulator Enable Bit for VDDX domainShould be set to 1 if no external BJT is present on
the PCB, cleared otherwise.
0 VDDX control loop does not use internal power transistor
1 VDDX control loop uses internal power transistor
Module Base + 0x001E
76543210
R000000
OMRE OSCMOD
W
Reset00000000
Figure 8-39. S12CPMU_UHV_V10_V6 Oscillator Register 2 (CPMUOSC2)
Table 8-31. CPMUVREGCTL Field Descriptions (continued)
Field Description
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334 Freescale Semiconductor
Table 8-32. CPMUOSC2 Field Descriptions
Field Description
1
OMRE
This bit enables the oscillator clock monitor reset. If OSCE bit in CPMUOSC register is 1, then the OMRE bit can
not be changed (writes will have no effect).
0 Oscillator clock monitor reset is disabled
1 Oscillator clock monitor reset is enabled
0
OSCMOD
This bit selects the mode of the external oscillator (XOSCLCP)
If OSCE bit in CPMUOSC register is 1, then the OSCMOD bit can not be changed (writes will have no effect).
0 External oscillator configured for loop controlled mode (reduced amplitude on EXTAL and XTAL))
1 External oscillator configured for full swing mode (full swing amplitude on EXTAL and XTAL)
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Freescale Semiconductor 335
8.3.2.29 VDDS Status Register (CPMUVDDS)
This register is only available in V10.
The CPMUVDDS register contains the status and flag bits for VDDS1 and VDDS2 to indicate integrity
fails. Monitoring of VDDS1 and VDDS2 domain is only active in full performance mode (FPM) and if the
respective supply is enabled in CPMUVREGCTL register. It is disabled in reduced performance mode
(RPM).
Read: Anytime
Write: SCS2IF, SCS1IF, LVS2IF and LVS1IF are write anytime,
SCS2, SCS, LVS2 and LVS1 are read only
Module Base + 0x001F
76543210
R SCS2 SCS1 L VDS2 LVDS1 SCS2IF SCS1IF LVS2IF LVS1IF
W
Reset00000U0U
The Reset state of LVDS and LVIF depends on the external supplied VDDA level
= Unimplemented or Reserved
Figure 8-40. VDDS Status Register (CPMUVDDS)
Table 8-33. CPMUVDDS Field Descriptions
Field Description
7
SCS2
Short circuit on VDDS2 Status Bit —This read-only status bit reflects short circuit status on VDDS2 supply.
If VDDS2 is enabled (EXTS2ON=1 in CPMUVREGCTL register), it is monitored that VDDS2 has the same
voltage level as VDDA.
0 VDDS2 voltage level is same as on VDDA supply or VDDS2 is disabled or RPM.
1 EXTS2ON =1 and the voltage level on VDDS2 is higher than on VDDA supply and FPM.
6
SCS1
Short circuit on VDDS1 Status Bit —This read-only status bit reflects short circuit status on VDDS1 supply.
If VDDS1 is enabled (EXTS1ON=1 in CPMUVREGCTL register), it is monitored that VDDS1 has the same
voltage level as VDDA.
0 VDDS1 voltage level is same as on VDDA supply or VDDS1 is disabled or RPM.
1 EXTS1ON =1 and the voltage level on VDDS1 is higher than on VDDA supply and FPM.
5
LVDS2
Low Voltage on VDDS2 Status Bit —This read-only status bit reflects the voltage level on VDDS2 supply.
If VDDS2 is enabled (EXTS2ON=1 in CPMUVREGCTL register), it is monitored that VDDS2 does not drop
below a voltage threshold VDDSM.
0 VDDS2 voltage is above VDDSM threshold or VDDS2 is disabled or RPM.
1 EXTS2ON =1 and VDDS2 voltage is below VDDSM threshold and FPM.
4
LVDS1
Low Voltage on VDDS1 Status Bit —This read-only status bit reflects the voltage level on VDDS1 supply.
If VDDS1 is enabled (EXTS1ON=1 in CPMUVREGCTL register), it is monitored that VDDS1 does not drop
below a voltage threshold VDDSM.
0 VDDS1 voltage is above VDDSM threshold or VDDS1 is disabled or RPM.
1 EXTS1ON =1 and VDDS1 voltage is below VDDSM threshold and FPM.
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3
SCS2IF
Short circuit VDDS2 Interrupt Flag SCS2IF is set to 1 when SCS2 status bit changes. This flag can only be
cleared by writing a 1. Writing a 0 has no effect. If enabled (VDDSIE = 1), SCS2IF causes an interrupt request.
0 No change in SCS2 bit.
1 SCS2 bit has changed.
2
SCS1IF
Short circuit VDDS2 Interrupt Flag SCS1IF is set to 1 when SCS1 status bit changes. This flag can only be
cleared by writing a 1. Writing a 0 has no effect. If enabled (VDDSIE = 1), SCS1IF causes an interrupt request.
0 No change in SCS1 bit.
1 SCS1 bit has changed.
1
LVS2IF
Low-Voltage VDDS2 Interrupt Flag — LVS2IF is set to 1 when LVDS2 status bit changes. This flag can only
be cleared by writing a 1. Writing a 0 has no effect. If enabled (VDDSIE = 1), LVS2IF causes an interrupt request.
0 No change in LVDS2 bit.
1 LVDS2 bit has changed.
0
LVS1IF
Low-Voltage VDDS1 Interrupt Flag — LVS1IF is set to 1 when LVDS1 status bit changes. This flag can only
be cleared by writing a 1. Writing a 0 has no effect. If enabled (VDDSIE = 1), LVS1IF causes an interrupt request.
0 No change in LVDS1 bit.
1 LVDS1 bit has changed.
Table 8-33. CPMUVDDS Field Descriptions (continued)
Field Description
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Freescale Semiconductor 337
8.4 Functional Description
8.4.1 Phase Locked Loop with Internal Filter (PLL)
The PLL is used to generate a high speed PLLCLK based on a low frequency REFCLK.
The REFCLK is by default the IRCCLK which is trimmed to fIRC1M_TRIM=1MHz.
If using the oscillator (OSCE=1) REFCLK will be based on OSCCLK. For increased flexibility , OSCCLK
can be divided in a range of 1 to 16 to generate the reference frequency REFCLK using the REFDIV[3:0]
bits. Based on the SYNDIV[5:0] bits the PLL generates the VCOCLK by multiplying the ref erence clock
by a 2, 4, 6,... 126, 128. Based on the POSTDIV[4:0] bits the VCOCLK can be divided in a range of 1,2,
3, 4, 5, 6,... to 32 to generate the PLLCLK.
.
NOTE
Although it is possible to set the dividers to command a very high clock
frequency, do not exceed the specified bus frequency limit for the MCU.
fVCO 2f
REF
SYNDIV 1+=
fREF
fOSC
REFDIV 1+
-------------------------------------
=
If oscillator is enabled (OSCE=1)
If oscillator is disabled (OSCE=0) fREF fIRC1M
=
fPLL
fVCO
POSTDIV 1+
-----------------------------------------
=
If PLL is locked (LOCK=1)
If PLL is not locked (LOCK=0) fPLL
fVCO
4
---------------
=
fbus
fPLL
2
-------------
=
If PLL is selected (PLLSEL=1)
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338 Freescale Semiconductor
Several examples of PLL divider settings are shown in Table 8-34. The following rules help to achieve
optimum stability and shortest lock time:
Use lowest possible fVCO / fREF ratio (SYNDIV value).
Use highest possible REFCLK frequency fREF.
The phase detector inside the PLL compares the feedback clock (FBCLK = VCOCLK/(SYNDIV+1)) with
the reference clock (REFCLK = (IRC1M or OSCCLK)/(REFDIV+1)). Correction pulses are generated
based on the phase difference between the two signals. The loop filter alters the DC voltage on the internal
filter capacitor, based on the width and direction of the correction pulse which leads to a higher or lower
VCO frequency.
The user must select the range of the REFCLK frequency (REFFRQ[1:0] bits) and the range of the
VCOCLK frequency (VCOFRQ[1:0] bits) to ensure that the correct PLL loop bandwidth is set.
The lock detector compares the frequencies of the FBCLK and the REFCLK. Therefore the speed of the
lock detector is directly proportional to the reference clock frequency. The circuit determines the lock
condition based on this comparison. So e.g. a failure in the reference clock will cause the PLL not to lock.
If PLL LOCK interrupt requests are enabled, the software can wait for an interrupt request and for instance
check the LOCK bit. If interrupt requests are disabled, software can poll the LOCK bit continuously
(during PLL start-up) or at periodic intervals. In either case, only when the LOCK bit is set, the VCOCLK
will have stabilized to the programmed frequency.
The LOCK bit is a read-only indicator of the locked state of the PLL.
The LOCK bit is set when the VCO frequency is within the tolerance, Lock, and is cleared when
the VCO frequency is out of the tolerance, unl.
Interrupt requests can occur if enabled (LOCKIE = 1) when the lock condition changes, toggling the
LOCK bit.In case of loss of reference clock (e.g. IRCCLK) the PLL will not lock or if already locked, then
it will unlock. The frequency of the VCOCLK will be very low and will depend on the value of the
VCOFRQ[1:0] bits.
Table 8-34. Examples of PLL Divider Settings
fosc REFDIV[3:0] fREF REFFRQ[1:0] SYNDIV[5:0] fVCO VCOFRQ[1:0] POSTDIV[4:0] fPLL fbus
off $00 1MHz 00 $18 50MHz 01 $03 12.5MHz 6.25MHz
off $00 1MHz 00 $18 50MHz 01 $00 50MHz 25MHz
4MHz $00 4MHz 01 $05 48MHz 00 $00 48MHz 24MHz
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8.4.2 Startup from Reset
An example for startup of the clock system from Reset is given in Figure 8-41.
Figure 8-41. Startup of clock system after Reset
System
PLLCLK =
Reset
fVCORST
CPU reset state vector fetch, program execution
LOCK
POSTDIV $03 (default target fPLL=fVCO/4 = 12.5MHz)
fPLL increasing fPLL=12.5MHz
tlock
SYNDIV $18 (default target fVCO=50MHz)
$00
fPLL=50MHz
example change
of POSTDIV
) (
RESET
Pin
) (
768 cycles
startup
fVCORST
n
STARTUP
cycles
fBUS
512 cycles
fVCORST
256 cycles
fVCORST
Core Clock
Bus Clock = fBUS increasing fBUS=6.25MHz fBUS=25MHz
) ( ) (
Core Clock/2
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340 Freescale Semiconductor
8.4.3 Stop Mode using PLLCLK as source of the Bus Clock
An example of what happens going into Stop Mode and exiting Stop Mode after an interrupt is shown in
Figure 8-42. Disable PLL Lock interrupt (LOCKIE=0) before going into Stop Mode.
Figure 8-42. Stop Mode using PLLCLK as source of the Bus Clock
Depending on the COP configuration there might be an additional significant latency time until COP is
active again after exit from Stop Mode due to clock domain crossing synchronization. This latency time
occurs if COP clock source is ACLK and the CSAD bit is set (please refer to CSAD bit description for
details).
8.4.4 Full Stop Mode using Oscillator Clock as source of the Bus Clock
An example of what happens going into Full Stop Mode and exiting Full Stop Mode after an interrupt is
shown in Figure 8-43.
Disable PLL Lock interrupt (LOCKIE=0) and oscillator status change interrupt (OSCIE=0) before going
into Full Stop Mode.
PLLCLK
CPU
LOCK tlock
STOP instructionexecution interrupt continue execution
wake up
tSTP_REC
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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Figure 8-43. Full Stop Mode using Oscillator Clock as source of the Bus Clock
Depending on the COP configuration there might be a significant latency time until COP is active again
after exit from Stop Mode due to clock domain crossing synchronization. This la tency time occurs if COP
clock source is ACLK and the CSAD bit is set (please refer to CSAD bit description for details).
CPU
UPOSC
tlock
STOP instruction
execution interrupt continue execution
wake up
tSTP_REC
Core
Clock
select OSCCLK as Core/Bus Clock by writing PLLSEL to “0”
PLLSEL
automatically set when going into Full Stop Mode
OSCCLK
PLLCLK
crystal/resonator starts oscillating
tUPOSC
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8.4.5 External Oscillator
8.4.5.1 Enabling the External Oscillator
An example of how to use the oscillator as source of the Bus Clock is shown in Figure 8-44.
Figure 8-44. Enabling the external oscillator
PLLSEL
OSCE
OSCCLK
Core
enable external oscillator by writing OSCE bit to one.
crystal/resonator starts oscillating
UPOSC
UPOSC flag is set upon successful start of oscillation
select OSCCLK as Core/Bus Clock by writing PLLSEL to zero
Clock
based on PLL Clock based on OSCCLK
tUPOSC
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8.4.6 System Clock Configurations
8.4.6.1 PLL Engaged Internal Mode (PEI)
This mode is the default mode after System Reset or Power-On Reset.
The Bus Clock is based on the PLLCLK, the reference clock for the PLL is internally generated (IRC1M).
The PLL is configured to 50 MHz VCOCLK with POSTDIV set to 0x03. If locked (LOCK=1) this results
in a PLLCLK of 12.5 MHz and a Bus Clock of 6.25 MHz. The PLL can be re-configured to other bus
frequencies.
The clock sources for COP and R TI can be based on the internal reference clock generator (IRC1M) or the
RC-Oscillator (ACLK).
8.4.6.2 PLL Engaged External Mode (PEE)
In this mode, the Bus Clock is based on the PLLCLK as well (like PEI). The reference clock for the PLL
is based on the external oscillator.
The clock sources for COP and RTI can be based on the internal reference clock generator or on the
external oscillator clock or the RC-Oscillator (ACLK).
This mode can be entered from default mode PEI by performing the following steps:
1. Configure the PLL for desired bus frequency.
2. Enable the external Oscillator (OSCE bit).
3. Wait for oscillator to start-up and the PLL being locked (LOCK = 1) and (UPOSC =1).
4. Clear all flags in the CPMUIFLG register to be able to detect any future status bit change.
5. Optionally status interrupts can be enabled (CPMUINT register).
Loosing PLL lock status (LOCK=0) means loosing the oscillator status information as well (UPOSC=0).
The impact of loosing the oscillator status (UPOSC=0) in PEE mode is as follows:
The PLLCLK is derived from the VCO clock (with its actual frequency) divided by four until the
PLL locks again.
Application software needs to be prepared to deal with the impact of loosing the oscillator status at any
time.
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344 Freescale Semiconductor
8.4.6.3 PLL Bypassed External Mode (PBE)
In this mode, the Bus Clock is based on the external oscillator clock. The reference clock for the PLL is
based on the external oscillator.
The clock sources for COP and RTI can be based on the internal reference clock generator or on the
external oscillator clock or the RC-Oscillator (ACLK).
This mode can be entered from default mode PEI by performing the following steps:
1. Make sure the PLL configuration is valid.
2. Enable the external Oscillator (OSCE bit)
3. Wait for the oscillator to start-up and the PLL being locked (LOCK = 1) and (UPOSC =1)
4. Clear all flags in the CPMUIFLG register to be able to detect any status bit change.
5. Optionally status interrupts can be enabled (CPMUINT register).
6. Select the Oscillator clock as source of the Bus clock (PLLSEL=0)
Loosing PLL lock status (LOCK=0) means loosing the oscillator status information as well (UPOSC=0).
The impact of loosing the oscillator status (UPOSC=0) in PBE mode is as follows:
PLLSEL is set automatically and the Bus clock source is switched back to the PLL clock.
The PLLCLK is derived from the VCO clock (with its actual frequency) divided by four until the
PLL locks again.
NOTEApplication software needs to be prepared to deal with the impact of loosing the oscillator status at
any time.
When using the oscillator clock as system clock (write PLLSEL = 0) it is
highly recommended to enable the oscillator clock monitor reset feature
(write OMRE = 1 in CPMUOSC2 register). If the oscillator monitor reset
feature is disabled (OMRE = 0) and the oscillator clock is used as system
clock, the system might stall in case of loss of oscillation.
8.5 Resets
8.5.1 General
All reset sources are listed in Table 8-35. There is only one reset vector for all these reset sources. Refer
to MCU specification for reset vector address.
Table 8-35. Reset Summary
Reset Source Local Enable
Power-On Reset (POR) None
Low Voltage Reset (LVR) None
External pin RESET None
PLL Clock Monitor Reset None
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8.5.2 Description of Reset Operation
Upon detection of any reset of Table 8-35, an internal circuit drives the RESET pin low for 512 PLLCLK
cycles. After 512 PLLCLK cycles the RESET pin is released. The internal reset of the MCU remains
asserted while the reset generator completes the 768 PLLCLK cycles long reset sequence.In case the
RESET pin is externally driven low for more than these 768 PLLCLK cycles (External Reset), the internal
reset remains asserted longer.
NOTE
While System Reset is asserted the PLLCLK runs with the frequency
fVCORST.
Figure 8-45. RESET Timing
8.5.3 Oscillator Clock Monitor Reset
If the external oscillator is enabled (OSCE=1)and the oscillator clock monitor reset is enabled (OMRE=1),
then in case of loss of oscillation or the oscillator frequency drops below the failure assert frequency fCMFA
(see device electrical characteristics for values), the S12CPMU_UHV_V10_V6 generates an Oscillator
Clock Monitor Reset. In Full Stop Mode the external oscillator and the oscillator clock monitor are
disabled.
Oscillator Clock Monitor Reset OSCE Bit in CPMUOSC register and
OMRE Bit in CPMUOSC2 register
COP Reset CR[2:0] in CPMUCOP register
Table 8-35. Reset Summary
Reset Source Local Enable
)
(
)
PLLCLK
512 cycles 256 cycles
S12_CPMU drives
possibly
RESET
driven low
externally
)
(
(
RESET
S12_CPMU releases
fVCORST
RESET pin low RESET pin
fVCORST
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8.5.4 PLL Clock Monitor Reset
In case of loss of PLL clock oscillation or the PLL clock frequency is below the failure assert frequency
fPMFA (see device electrical characteristics for values), the S12CPMU_UHV_V10_V6 generates a PLL
Clock Monitor Reset. In Full Stop Mode the PLL and the PLL clock monitor are disabled.
8.5.5 Computer Operating Properly Watchdog (COP) Reset
The COP (free running watchdog timer) enables the user to check that a program is running and
sequencing properly. When the COP is being used, software is responsible for keeping the COP from
timing out. If the COP times out it is an indication that the software is no longer being executed in the
intended sequence; thus COP reset is generated.
The clock source for the COP is either ACLK, IRCCLK or OSCCLK depending on the setting of the
COPOSCSEL0 and COPOSCSEL1 bit.
Depending on the COP configuration there might be a significant latency time until COP is active again
after exit from Stop Mode due to clock domain crossing synchronization. This la tency time occurs if COP
clock source is ACLK and the CSAD bit is set (please refer to CSAD bit description for details).
Table 8-36 gives an overview of the COP condition (run, static) in Stop Mode depending on legal
configuration and status bit settings:
Table 8-36. COP condition (run, static) in Stop Mode
COPOSCSEL1 CSAD PSTP PCE COPOSCSEL0 OSCE UPOSC COP counter behavior in Stop Mode
(clock source)
1 0 x x x x x Run (ACLK)
11xx x x x Static (ACLK)
0 x 1 1 1 1 1 Run (OSCCLK)
0 x 1 1 0 0 x Static (IRCCLK)
0 x 1 1 0 1 x Static (IRCCLK)
0 x 1 0 0 x x Static (IRCCLK)
0x101 1 1 Static (OSCCLK)
0x011 1 1 Static (OSCCLK)
0 x 0 1 0 1 x Static (IRCCLK)
0 x 0 1 0 0 0 Static (IRCCLK)
0 x 0 0 1 1 1 Satic (OSCCLK)
0 x 0 0 0 1 1 Static (IRCCLK)
0 x 0 0 0 1 0 Static (IRCCLK)
0 x 0 0 0 0 0 Static (IRCCLK)
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Three control bits in the CPMUCOP register allow selection of seven COP time-out periods.
When COP is enabled, the program must write $55 and $AA (in this order) to the CPMUARMCOP
register during the selected time-out period. Once this is done, the COP time-out period is restarted. If the
program fails to do this and the COP times out, a COP reset is generated. Also, if any value other than $55
or $AA is written, a COP reset is generated.
W indowed COP operation is enabled by setting WCOP in the CPMUCOP register. In this mode, writes to
the CPMUARMCOP register to clear the COP timer must occur in the last 25% of the selected time-out
period. A premature write will immediately reset the part.
In MCU Normal Mode the COP time-out period (CR[2:0]) and COP window (WCOP) setting can be
automatically pre-loaded at reset release from NVM memory (if values are defined in the NVM by the
application). By default the COP is off and no window COP feature is enabled after reset release via NVM
memory. The COP control register CPMUCOP can be written once in an application in MCU Normal
Mode to update the COP time-out period (CR[2:0]) and COP window (WCOP) setting loaded from NVM
memory at reset release. Any value for the new COP time-out period and COP window setting is allowed
except COP off value if the COP was enabled during pre-load via NVM memory.
The COP clock source select bits can not be pre-loaded via NVM memory at reset release. The IRC clock
is the default COP clock source out of reset.
The COP clock source select bits (COPOSCSEL0/1) and ACLK clock control bit in Stop Mode (CSAD)
can be modified until the CPMUCOP register write once has taken place. Therefore these control bits
should be modified before the final COP time-out period and window COP setting is written.
The CPMUCOP register access to modify the COP time-out period and window COP setting in MCU
Normal Mode after reset release must be done with the WRTMASK bit cleared otherwise the update is
ignored and this access does not count as the write once.
8.5.6 Power-On Reset (POR)
The on-chip POR circuitry detects when the internal supply VDD drops below an appropriate voltage
level. The POR is deasserted, if the internal supply VDD exceeds an appropriate voltage level (voltage
levels not specified, because the internal supply can not be monitored externally).The POR circuitry is
always active. It acts as LVR in Stop Mode.
8.5.7 Low-Voltage Reset (LVR)
The on-chip LVR circuitry detects when one of the supply voltages VDD, VDDX and VDDF drops below
an appropriate voltage level. If LVR is deasserted the MCU is fully operational at the specif ied maximum
speed. The LVR assert and deassert levels for the supply voltage VDDX are VLVRXA and VLVRXD and are
specified in the device Reference Manual.The LVR circuitry is active in Run- and Wait Mode.
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8.6 Interrupts
The interrupt vectors requested by the S12CPMU_UHV_V10_V6 are listed in Table 8-37. Refer to MCU
specification for related vector addresses and priorities.
8.6.1 Description of Interrupt Operation
8.6.1.1 Real Time Interrupt (RTI)
The clock source for the RTI is either IRCCLK or OSCCLK depending on the setting of the RTIOSCSEL
bit. In Stop Mode with PSTP=1 (Pseudo Stop Mode), RTIOSCSEL=1 and PRE=1 the RTI continues to
run, else the RTI counter halts in Stop Mode.
The RTI can be used to generate hardware interrupts at a fixed periodic rate. If enabled (by setting
R TIE=1), this interrupt will occur at the rate selected by the CPMUR TI register. At the end of the R TI time-
out period the RTIF flag is set to one and a new RTI time-out period starts immediately.
A write to the CPMURTI register restarts the RTI time-out period.
8.6.1.2 PLL Lock Interrupt
The S12CPMU_UHV_V10_V6 generates a PLL Lock interrupt when the lock condition (LOCK status
bit) of the PLL changes, either from a locked state to an unlocked state or vice versa. Lock interrupts are
locally disabled by setting the LOCKIE bit to zero. The PLL Lock interrupt flag (LOCKIF) is set to1 when
the lock condition has changed, and is cleared to 0 by writing a 1 to the LOCKIF bit.
8.6.1.3 Oscillator Status Interrupt
When the OSCE bit is 0, then UPOSC stays 0. When OSCE=1 the UPOSC bit is set after the LOCK bit is
set.
Table 8-37. S12CPMU_UHV_V10_V6 Interrupt Vectors
Interrupt Source CCR
Mask Local Enable
RTI time-out interrupt I bit CPMUINT (RTIE)
PLL lock interrupt I bit CPMUINT (LOCKIE)
Oscillator status interrupt I bit CPMUINT (OSCIE)
Low voltage interrupt I bit CPMULVCTL (LVIE)
VDDS integrity interrupt(1)
1. Only available in V10
I bit CPMULVCTL (VDDSIE)
High temperature interrupt I bit CPMUHTCTL (HTIE)
Autonomous Periodical
Interrupt
I bit CPMUAPICTL (APIE)
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Upon detection of a status change (UPOSC) the OSCIF flag is set. Going into Full Stop Mode or disabling
the oscillator can also cause a status change of UPOSC.
Any change in PLL configuration or any other event which causes the PLL lock status to be cleared leads
to a loss of the oscillator status information as well (UPOSC=0).
Oscillator status change interrupts are locally enabled with the OSCIE bit.
NOTE
Loosing the oscillator status (UPOSC=0) affects the clock configuration of
the system1. This needs to be dealt with in application software.
8.6.1.4 Low-Voltage Interrupt (LVI)
In FPM the input voltage VDDA is monitored. Whenever VDDA drops below level VLVIA, the status bit
LVDS is set to 1. When VDDA rises above level VLVID the status bit LVDS is cleared to 0. An interrupt,
indicated by flag LVIF = 1, is triggered by any change of the status bit LVDS if interrupt enable bit LVIE
= 1.
8.6.1.5 VDDS Integrity Interrupt
This interrupt is only available in V10.
In FPM the input voltages VDDS1 and VSS2 are monitored for integrity. The flags in CPMUVDDS
register indicate such a failing condition. When one the status bits changes, the respective flag is set in
CPMUVDDS register. If interrupt is enabled (VDDSIE = 1) an interrupt is triggered by any of these flags.
See CPMUVDDS register description for details.
8.6.1.6 HTI - High Temperature Interrupt
In FPM the junction temperature TJ is monitored. Whenever TJ exceeds level THTIA the status bit HTDS
is set to 1. Vice versa, HTDS is reset to 0 when TJ get below level THTID. An interrupt, indicated by flag
HTIF = 1, is triggered by any change of the status bit HTDS, if interrupt enable bit HTIE = 1.
8.6.1.7 Autonomous Periodical Interrupt (API)
The API sub-block can generate periodical interrupts independent of the clock source of the MCU. To
enable the timer, the bit APIFE needs to be set.
The API timer is either clocked by the Autonomous Clock (ACLK - trimmable internal RC oscillator) or
the Bus Clock. Timer operation will freeze when MCU clock source is selected and Bus Clock is turned
off. The clock source can be selected with bit APICLK. APICLK can only be written when APIFE is not
set.
The APIR[15:0] bits determine the interrupt period. APIR[15:0] can only be written when APIFE is
cleared. As soon as APIFE is set, the timer starts running for the period selected by APIR[15:0] bits. When
the configured time has elapsed, the flag APIF is set. An interrupt, indicated by flag APIF = 1, is triggered
if interrupt enable bit APIE = 1. The timer is re-started automatically again after it has set APIF.
1. For details please refer to “8.4.6 System Clock Configurations”
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The procedure to change APICLK or APIR[15:0] is first to clear APIFE, then write to APICLK or
APIR[15:0], and afterwards set APIFE.
The API Trimming bits ACLKTR[5:0] must be set so the minimum period equals 0.2 ms if stable
frequency is desired.
See Table 8-21 for the trimming effect of ACLKTR[5:0].
NOTE
The first period after enabling the counter by APIFE might be reduced by
API start up delay tsdel.
It is possible to generate with the API a waveform at the external pin API_EXTCLK by setting APIFE and
enabling the external access with setting APIEA.
8.7 Initialization/Application Information
8.7.1 General Initialization Information
Usually applications run in MCU Normal Mode.
It is recommended to write the CPMUCOP register in any case from the application program initialization
routine after reset no matter if the COP is used in the application or not, even if a configuration is loaded
via the flash memory after reset. By doing a “controlled” write access in MCU Normal Mode (with the
right value for the application) the write once for the COP configuration bits (WCOP,CR[2:0]) takes place
which protects these bits from further accidental change. In case of a program sequencing issue (code
runaway) the COP configuration can not be accidentally modified anymore.
8.7.2 Application information for COP and API usage
In many applications the COP is used to check that the program is running and sequencing properly. Often
the COP is kept running during S top Mode and periodic wake-up events are needed to service the COP on
time and maybe to check the system status.
For such an application it is reco mmended to use the ACLK as clock source for both COP and API. This
guarantees lowest possible IDD current during S top Mode. Additionally it eases software implementation
using the same clock source for both, COP and API.
The Interrupt Service Routine (ISR) of the Autonomous Periodic Interrupt API should contain the write
instruction to the CPMUARMCOP register. The value (byte) written is derived from the “main routine”
(alternating sequence of $55 and $AA) of the application software.
Using this method, then in the case of a runtime or program sequencing issue the application “main
routine” is not executed properly anymore and the alternating va lues are not provided properly. Hence the
COP is written at the correct time (due to independent API interrupt request) but the wrong value is written
(alternating sequence of $55 and $AA is no longer maintained) which causes a COP reset.
If the COP is stopped during any Stop Mode it is recommended to service the COP shortly before Stop
Mode is entered.
Chapter 8 S12 Clock, Reset and Power Management Unit (V10 and V6)
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Freescale Semiconductor 351
8.7.3 Application Information for PLL and Oscillator Startup
The following C-code example shows a recommended way of setting up the system clock system using
the PLL and Oscillator:
/* Procedure proposed by to setup PLL and Oscillator */
/* example for OSC = 4 MHz and Bus Clock = 25MHz, That is VCOCLK = 50MHz */
/* Initialize */
/* PLL Clock = 50 MHz, divide by one */
CPMUPOSTDIV = 0x00;
/* Generally: Whenever changing PLL reference clock (REFCLK) frequency to a higher value */
/* it is recommended to write CPMUSYNR = 0x00 in order to stay within specified */
/* maximum frequency of the MCU */
CPMUSYNR = 0x00;
/* configure PLL reference clock (REFCLK) for usage with Oscillator */
/* OSC=4MHz divide by 4 (3+1) = 1MHz, REFCLK range 1MHz to 2 MHz (REFFRQ[1:0] = 00) */
CPMUREFDIV = 0x03;
/* enable external Oscillator, switch PLL reference clock (REFCLK) to OSC */
CPMUOSC = 0x80;
/* multiply REFCLK = 1MHz by 2*(24+1)*1MHz = 50MHz */
/* VCO range 48 to 80 MHz (VCOFRQ[1:0] = 01) */
CPMUSYNR = 0x58;
/* clear all flags, especially LOCKIF and OSCIF */
CPMUIFLG = 0xFF;
/* put your code to loop and wait for the LOCKIF and OSCIF or */
/* poll CPMUIFLG register until both UPOSC and LOCK status are “1” */
/* that is CPMUIFLG == 0x1B */
/*...............continue to your main code execution here...............*/
/* in case later in your code you want to disable the Oscillator and use the */
/* 1MHz IRCCLK as PLL reference clock */
/* Generally: Whenever changing PLL reference clock (REFCLK) frequency to a higher value */
/* it is recommended to write CPMUSYNR = 0x00 in order to stay within specified */
/* maximum frequency of the MCU */
CPMUSYNR = 0x00;
/* disable OSC and switch PLL reference clock to IRC */
CPMUOSC = 0x00;
/* multiply REFCLK = 1MHz by 2*(24+1)*1MHz = 50MHz */
/* VCO range 48 to 80 MHz (VCOFRQ[1:0] = 01) */
CPMUSYNR = 0x58;
/* clear all flags, especially LOCKIF and OSCIF */
CPMUIFLG = 0xFF;
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/* put your code to loop and wait for the LOCKIF or */
/* poll CPMUIFLG register until both LOCK status is “1” */
/* that is CPMUIFLG == 0x18 */
/*...............continue to your main code execution here...............*/
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Freescale Semiconductor 353
Chapter 9
Analog-to-Digital Converter (ADC12B_LBA)
9.1 Differences ADC12B_LBA V1 vs V2 vs V3
NOTE
Device reference manuals specify which module version is integrated on the
device. Some reference manuals support families of devices, with device
dependent module versions. This chapter describes the superset. The feature
differences are listed in Table 9-2.
Table 9-2. Comparison of ADC12B_LBA Module Versions
Table 9-1. Revision History
Revision
Number
Revision
Date Sections Affected Description of Changes
V1.37 19. Apr 2013 - Updates from review of reference manual to fix typos etc.
V1.38 30. Apr 2013 9.5.2.13/9-381
Provided more detailed information regarding captured information in
bits RIDX_IMD[5:0] for different scenarios of Sequence Abort Event
execution.
V1.39 02. Jul 2013 9.5.2.6/9-370 Update of: Timing considerations for Restart Mode
V1.40 02. Oct 2013 entire document Updated formatting and wording correction for entire document (for
technical publications).
V2.00 14. Oct. 2014
9.3/9-355,
9.5.2.15/9-383,
9.5.2.17/9-388,
Figure 9-2./9-359,
Added option bits to conversion command for top level SoC specific
feature/function implementation option.
V3.00 27. Feb. 2015 9.5.2.16/9-386,
9.1/9-353
Changed ADCCMD_1 VRH_SEL, VRL_SEL
Single document for all versions (V1,V2,V3)
Feature V1V2V3
ADC Command Register 0 (ADCCMD_0),
ADC Command Register 2 (ADCCMD_2): OPT[3:0] bits
No Yes Yes
ADC Command Register 1 (ADCCMD_1):VRH_SEL[1:0] No No Yes
ADC Command Register 1 (ADCCMD_1):VRH_SEL,VRL_SEL Yes Yes No
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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354 Freescale Semiconductor
9.2 Introduction
The ADC12B_LBA is an n-channel multiplexed input su ccessive approximation analog-to-digital
converter. Refer to device electrical specifications for ADC parameters and accuracy.
The List Based Architecture (LBA) provides flexible conversion sequence definition as well as flexible
oversampling. The order of channels to be converted can be freely defined. Also, multiple instantiations
of the module can be triggered simultaneously (matching sampling point across multiple module
instantiations).
There are four register bits which control the conversion flow (please refer to the description of register
ADCFLWCTL).
The four conversion flow control bits of register ADCFLWCTL can be modified in two different ways:
Via data bus accesses
Via internal interface Signals (Trigger, Restart, LoadOK, and Seq_Abort; see also Figure 9-2).
Each Interface Signal is associated with one conversion flow control bit.
For information regarding internal interface connectivity related to the conversion flow control please
refer to the device overview of the reference manual.
The ADCFLWCTL register can be controlled via internal interface only or via data bus only or by both
depending on the register access configuration bits ACC_CFG[1:0].
The four bits of register ADCFLWCTL reflect the captured request and status of the four internal interface
Signals (LoadOK, Trigger, Restart, and Seq_abort; see also Figure 9-2) if access configuration is set
accordingly and indicate event progress (when an event is processed and when it is finished).
Conversion flow error situations are captured by corresponding interrupt flags in the ADCEIF register.
There are two conversion flow control modes (Restart Mode, Trigger Mode). Each mode causes a certain
behavior of the conversion flow control bits which can be selected according to the application needs.
Please refer to Section 9.5.2.1, “ADC Control Register 0 (ADCCTL_0) and Section 9.6.3.2.4, “The two
conversion flow control Mode Configurations for more information regarding conversion flow control.
Because internal components of the ADC are turned on/off with bit ADC_EN, the ADC requires a
recovery time period (tREC) after ADC is enabled until the first conversion can be launched via a trigger.
When bit ADC_EN gets cleared (transition from 1’b1 to 1’b0) any ongoing conversion sequence will be
aborted and pending results, or the result of current conversion, gets discarded (not stored). The ADC
cannot be re-enabled before any pending action or action in process is finished respectively aborted, which
could take up to a maximum latency time of tDISABLE (see device level specification for more details).
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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Freescale Semiconductor 355
9.3 Key Features
Programmers Model with List Based Architecture for conversion command and result value
organization
Selectable resolution of 8-bit, 10-bit, or 12-bit
Channel select control for n external analog input channels
Provides up to eight device internal channels (please see the device reference manual for
connectivity information and Figure 9-2)
Programmable sample time
A sample buffer amplifier for channel sampling (improved performance in view to influence of
channel input path resistance versus conversion accuracy)
Left/right justified result data
Individual selectable VRH_0/1 and VRL_0/1 inputs (ADC12B_LBA V1 and V2) or VRH_0/1/2
inputs (ADC12B_LBA V3) on a conversion command basis (please see Figure 9-2, Table 9-2)
Special conversions for selected VRH_0/1 (V1 and V2) or VRH_0/1/2 (V3), VRL_0/1 (V1 and
V2) or VRL_0 (V3), (VRL_0/1 + VRH_0/1) / 2 (V1 and V2) or (VRL_0 + VRH_0/1/2) / 2 (V3)
(please see Table 9-2)
15 conversion interrupts with flexible interrupt or ganization per conversion result
One dedicated interrupt for “End Of List” type commands
Command Sequence List (CSL) with a maximum number of 64 command entries
Provides conversion sequence abort
Restart from top of active Command Sequence List (CSL)
The Command Sequence List and Result Value List are implemented in double buffered manner
(two lists in parallel for each function)
Conversion Command (CSL) loading possible from System RAM or NVM
Single conversion flow control register with software selectable access path
Two conversion flow control modes optimized to different application use cases
Four option bits in the conversion command for top level SoC specific feature/function
implementation option (Please refer to the device reference manual for details of the top level
feature/function if implemented)
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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356 Freescale Semiconductor
9.3.1 Modes of Operation
9.3.1.1 Conversion Modes
This architecture provides single, multiple, or continuous conversion on a single channel or on multiple
channels based on the Command Sequence List.
9.3.1.2 MCU Operating Modes
MCU Stop Mode
Before issuing an MCU Stop Mode request the ADC should be idle (no conversion or conversion
sequence or Command Sequence List ongoing).
If a conversion, conversion sequence, or CSL is in progress when an MCU Stop Mode request is
issued, a Sequence Abort Event occurs automatically and any ongoing conversion finish. After the
Sequence Abort Event finishes, if the STR_SEQA bit is set (STR_SEQA=1), then the conversion
result is stored and the corresponding flags are set. If the STR_SEQA bit is cleared
(STR_SEQA=0), then the conversion result is not stored and the corresponding flags are not set.
The microcontroller then enters MCU Stop Mode without SEQAD_IF being set.
Alternatively, the Sequence Abort Event can be issued by software before an MCU Stop Mode
request. As soon as flag SEQAD_IF is set the MCU Stop Mode request can be is issued.
With the occurrence of the MCU Stop Mode Request until exit from Stop Mode all flow control
signals (RSTA, SEQA, LDOK, TRIG) are cleared.
After exiting MCU Stop Mode, the following happens in the order given with expected event(s)
depending on the conversion flow control mode:
In ADC conversion flow control mode “Trigger Mode” a Restart Event is expected to
simultaneously set bits TRIG and RSTA, causing the ADC to execute the Restart Event
(CMD_IDX and RVL_IDX cleared) followed by the T rigg er Event. The Restart Event can be
generated automatically after exit from MCU Stop Mode if bit AUT_RSTA is set.
In ADC conversion flow control mode “Restart Mode”, a Restart Event is expected to set bit
RSTA only (ADC already aborted at MCU Stop Mode entry hence bit SEQA must not be set
simultaneously) causing the ADC to execute the Restart Event (CDM_IDX and RVL_IDX
cleared). The Restart Event can be generate d automatically afte r exit from MCU Stop Mode if
bit AUT_RSTA is set.
The RVL buffer select (RVL_SEL) is not changed if a CSL is in process at MCU Stop Mode
request. Hence the same buffer will be used after exit from S top Mode that was used when the
Stop Mode request occurred.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 357
MCU Wait Mode
Depending on the ADC Wait Mode configuration bit SWAI, the ADC either continues conversion
in MCU W ait Mode or freezes conversion at the next conversion boundary before MCU W ait Mode
is entered.
ADC behavior for configuration SWAI =1’b0:
The ADC continues conversion during Wait Mode according to the conversion flow control
sequence. It is assumed that the conversion flow control sequence is continued (conversion flow
control bits TRIG, RSTA, SEQA, and LDOK are serviced accordingly).
ADC behavior for configuration SWAI = 1’b1:
At MCU Wait Mode request the ADC should be idle (no conversion or conversion sequence or
Command Sequence List ongoing).
If a conversion, conversion sequence, or CSL is in progress when an MCU Wait Mode request is
issued, a Sequence Abort Event occurs automatically and any ongoing conversion finish. After the
Sequence Abort Event finishes, if the STR_SEQA bit is set (STR_SEQA=1), then the conversion
result is stored and the corresponding flags are set. If the STR_SEQA bit is cleared
(STR_SEQA=0), then the conversion result is not stored and the corresponding flags are not set.
Alternatively the Sequence Abort Event can be issued by software before MCU Wait Mode
request. As soon as flag SEQAD_IF is set, the MCU Wait Mode request can be issued.
With the occurrence of the MCU Wait Mode request until exit from Wait Mode all flow control
signals (RSTA, SEQA, LDOK, TRIG) are cleared.
After exiting MCU Wait Mode, the following happens in the order given with expected event(s)
depending on the conversion flow control mode:
In ADC conversion flow control mode “Trigger Mode”, a Restart Event is expected to occur.
This simultaneously sets bit TRIG and RSTA causing the ADC to execute the Restart Event
(CMD_IDX and RVL_IDX cleared) followed by the T rigg er Event. The Restart Event can be
generated automatically after exit from MCU Wait Mode if bit AUT_RSTA is set.
In ADC conversion flow control mode “Restart Mode”, a Restart Event is expected to set bit
RSTA only (ADC already aborted at MCU Wait Mode entry hence bit SEQA must not be set
simultaneously) causing the ADC to execute the Restart Event (CDM_IDX and RVL_IDX
cleared). The Restart Event can be generated automatically after exit from MCU Wait Mode if
bit AUT_RSTA is set.
The RVL buffer select (RVL_SEL) is not changed if a CSL is in process at MCU Wait Mode
request. Hence the same R VL buffer will be used after exit from W ait Mode that was used when
Wait Mode request occurred.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
358 Freescale Semiconductor
NOTE
In principle, the MCU could stay in Wait Mode for a shorter period of time
than the ADC needs to abort an ongoing conversion (range of µµµµs).
Therefore in case a Sequence Abort Event is issued automatically due to
MCU Wait Mode request a following Restart Event after exit from MCU
Wait Mode can not be executed before ADC has finished this Sequence
Abort Event. The Restart Event is detected but it is pending.
This applies in case MCU Wait Mode is exited before ADC has finished the
Sequence Abort Event and a Restart Event is iss ued immediate ly after exit
from MCU Wait Mode. Bit READY can be used by software to detect when
the Restart Event can be issued without latency time in processing the event
(see also Figure 9-1).
Figure 9-1. Conversion Flow Control Diagram - Wait Mode (SWAI=1’b1, AUT_RSTA=1’b0)
MCU Freeze Mode
Depending on the ADC Freeze Mode configuration bit FRZ_MOD, the ADC either continues
conversion in Freeze Mode or freezes conversion at next conversion boundary before the MCU
Freeze Mode is entered. After exit from MCU Freeze Mode with previously frozen conversion
sequence the ADC continues the conversion with the next conversion command and all ADC
interrupt flags are unchanged during MCU Freeze Mode.
CSL_0 Active
AN3 AN1 AN4 IN5
AN6 AN1
Wait Mode request (SWAI=1’b1),
Automatic Sequence Abort
Event
Wait Mode
entry
Wake-up
Event
Idle Active
AN3 AN1 AN4
Abort
Sequence_n EOS
Sequence_0
AN5 AN2 AN0
Sequence_1
Trigger
Begin from top of current CSL
READY=1’b1
Restart
Event
Earliest point of time to issue
Restart Event without latenc y
t
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 359
9.3.2 Block Diagram
Figure 9-2. ADC12B_LBA Block Diagram
Successive
Approximation
Register (SAR)
and C-DAC
VSSA
ANx
ext.
MUX
Result List
Result_0
Result_1
..........
..........
Sample & Hold
VDDA
VRH_0
VRH_1
Sequence Abort Int.
+
-
Comparator
Clock
Prescaler
System Clock ADC Clock
Seq_abort
Trigger
Restart
...........
..........
...........
...........
...........
...........
...........
Result 63
.....
AN2
AN1
AN0
Conversion
(RAM)
DMA access
Command
Comm_0
Comm_1
..........
..........
...........
..........
...........
...........
...........
...........
...........
Comm 63
Sequence
(RAM/
DMA access
List
Error
handler
active
Active
Alternative-
Sequence
Command
List
Idle/
LoadOK
FlowCtrl Issue
Error/
see reference
manual for
connectivity
ADC
Temperature
Sense
VREG_sense
Internal_7
Internal_6
Internal_5
Internal_4
Internal_3
Internal_2
Channel
int.
MUX
Channel
(Conversion Flow, Timing, Interrupt)
Control Unit
Conversion Int.
(RAM/
information
(EN)
Data Bus
Alternative
Result
List
(RAM)
VRL_1 (V1, V2)
VRL_0
Int.
regarding ADC
internal interface
PIM
+
-
Final
Buffer
Buffer
AMP
NVM)
NVM)
ADC12B_LBA
Option Bits
VRH_2 (V3)
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
360 Freescale Semiconductor
9.4 Signal Description
This section lists all inputs to the ADC12B_LBA block.
9.4.1 Detailed Signal Descriptions
9.4.1.1 ANx (x = n,..., 2, 1, 0)
This pin serves as the analog input Channel x. The maximum input channel number is n. Please refer to
the device reference manual for the maximum number of input channels.
9.4.1.2 VRH_0, VRH_1, VRH_2, VRL_0, VRL_1
VRH_0/1/2 are the high reference voltages, VRL0/1 are the low reference voltages for a ADC conversion
selectable on a conversion command basis. Please refer to the device overview information for availability
and connectivity of these pins.
VRH_2 is only available on ADC12B_LBA V3.
VRL_1 is only available on ADC12B_LBA V1 and V2.
See also Table 9-2.
9.4.1.3 VDDA, VSSA
These pins are the power supplies for the analog circuitry of the ADC12B_LBA block.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 361
9.5 Memory Map and Register Definition
This section provides a detailed description of all registers accessible in the ADC12B_LBA.
9.5.1 Module Memory Map
Figure 9-3 gives an overview of all ADC12B_LBA registers.
NOTE
Register Address = Base Address + Address Offset, where the Base Address
is defined at the MCU level and the Address Of fset is defined at the module
level.
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0000 ADCCTL_0 RADC_EN ADC_SR FRZ_MOD SWAI ACC_CFG[1:0] STR_SEQA MOD_CFG
W
0x0001 ADCCTL_1 RCSL_BMOD RVL_BMOD SMOD_ACC AUT_RSTA 00 00
W
0x0002 ADCSTS RCSL_SEL RVL_SEL DBECC_ERR Reserved READY 0 00
W
0x0003 ADCTIM R0 PRS[6:0]
W
0x0004 ADCFMT RDJM 0000SRES[2:0]
W
0x0005 ADCFLWCTL RSEQA TRIG RSTA LDOK 00 0 0
W
0x0006 ADCEIE RIA_EIE CMD_EIE EOL_EIE Reserved TRIG_EIE RSTAR_EIE LDOK_EIE 0
W
0x0007 ADCIE RSEQAD_IE CONIF_OIE Reserved 00 0 0 0
W
0x0008 ADCEiF RIA_EIF CMD_EIF EOL_EIF Reserved TRIG_EIF RSTAR_EIF LDOK_EIF 0
W
0x0009 ADCIF RSEQAD_IF CONIF_OIF Reserved 00 0 0 0
W
0x000A ADCCONIE_0 RCON_IE[15:8]
W
0x000B ADCCONIE_1 RCON_IE[7:1] EOL_IE
W
0x000C ADCCONIF_0 RCON_IF[15:8]
W
0x000D ADCCONIF_1 RCON_IF[7:1] EOL_IF
W
0x000E ADCIMDRI_0 RCSL_IMD RVL_IMD 000000
0x000F ADCIMDRI_1 R 0 0 RIDX_IMD[5:0]
W
= Unimplemented or Reserved
Figure 9-3. ADC12B_LBA Register Summary (Sheet 1 of 3)
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
362 Freescale Semiconductor
0x0010 ADCEOLRI R CSL_EOL RVL_EOL 0 0 0 0 0 0
W
0x0011 Reserved R0 0 0 0 0 0 0 0
W
0x0012 Reserved R0 0 0 0 0 0 0 0
W
0x0013 Reserved R Reserved Reserved 0 0
W
0x0014 ADCCMD_0
(V1)
RCMD_SEL 00 INTFLG_SEL[3:0]
W
0x0014 ADCCMD_0
(V2, V3)
RCMD_SEL OPT[1:0] INTFLG_SEL[3:0]
W
0x0015 ADCCMD_1
(V1, V2)
RVRH_SEL VRL_SEL CH_SEL[5:0]
W
0x0015 ADCCMD_1
(V3)
RVRH_SEL[1:0] CH_SEL[5:0]
W
0x0016 ADCCMD_2
(V1)
RSMP[4:0] 00
Reserved
W
0x0016 ADCCMD_2
(V2, V3)
RSMP[4:0] OPT[3:2] Reserved
W
0x0017 ADCCMD_3 R Reserved Reserved Reserved
W
0x0018 Reserved R Reserved
W
0x0019 Reserved R Reserved
W
0x001A Reserved R Reserved
W
0x001B Reserved R Reserved
W
0x001C ADCCIDX R0 0 CMD_IDX[5:0]
W
0x001D ADCCBP_0 RCMD_PTR[23:16]
W
0x001E ADCCBP_1 RCMD_PTR[15:8]
W
0x001F ADCCBP_2 RCMD_PTR[7:2] 00
W
0x0020 ADCRIDX R 0 0 RES_IDX[5:0]
W
0x0021 ADCRBP_0 R0 0 0 0 RES_PTR[19:16]
W
0x0022 ADCRBP_1 RRES_PTR[15:8]
W
0x0023 ADCRBP_2 RRES_PTR[7:2] 00
W
Address Name Bit 7 6 5 4 3 2 1 Bit 0
= Unimplemented or Reserved
Figure 9-3. ADC12B_LBA Register Summary (Sheet 2 of 3)
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 363
0x0024 ADCCROFF0 R0 CMDRES_OFF0[6:0]
W
0x0025 ADCCROFF1 R0 CMDRES_OFF1[6:0]
W
0x0026 Reserved R0 0 0 0 Reserved
W
0x0027 Reserved R Reserved
W
0x0028 Reserved R Reserved 00
W
0x0029 Reserved R Reserved 0 Reserved
W
0x002A-
0x003F Reserved R0 0 0 0 0 0 0 0
W
Address Name Bit 7 6 5 4 3 2 1 Bit 0
= Unimplemented or Reserved
Figure 9-3. ADC12B_LBA Register Summary (Sheet 3 of 3)
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
364 Freescale Semiconductor
9.5.2 Register Descriptions
This section describes in address order all the ADC12B_LBA registers and their individual bits.
9.5.2.1 ADC Control Register 0 (ADCCTL_0)
Read: Anytime
Write:
Bits ADC_EN, ADC_SR, FRZ_MOD and SWAI writable anytime
Bits MOD_CFG, STR_SEQA and ACC_CFG[1:0] writable if bit ADC_EN clear or bit
SMOD_ACC set
Module Base + 0x0000
1 5 14 13 12 11 10 9 8
RADC_EN ADC_SR FRZ_MOD SWAI ACC_CFG[1:0] STR_SEQA MOD_CFG
W
Reset00000000
= Unimplemented or Reserved
Figure 9-4. ADC Control Register 0 (ADCCTL_0)
Table 9-3. ADCCTL_0 Field Descriptions
Field Description
15
ADC_EN
ADC Enable Bit This bit enables the ADC (e.g. sample buffer amplifier etc.) and controls accessibility of ADC
register bits. When this bit gets cleared any ongoing conversion sequence will be aborted and pending results
or the result of current conversion gets discarded (not stored). The ADC cannot be re-enabled before any
pending action or action in process is finished or aborted, which could take up to a maximum latency time of
tDISABLE (see device reference manual for more details).
Because internal components of the ADC are turned on/off with this bit, the ADC requires a recovery time period
(tREC) after ADC is enabled until the first conversion can be launched via a trigger.
0 ADC disabled.
1 ADC enabled.
14
ADC_SR
ADC Soft-Reset — This bit causes an ADC Soft-Reset if set after a severe error occurred (see list of severe
errors in Section 9.5.2.9, “ADC Error Interrupt Flag Register (ADCEIF) that causes the ADC to cease operation).
It clears all overrun flags and error flags and forces the ADC state machine to its idle state. It also clears the
Command Index Register, the Result Index Register, and the CSL_SEL and RVL_SEL bits (to be ready for a new
control sequence to load new command and start execution again from top of selected CSL).
A severe error occurs if an error flag is set which cause the ADC to cease operation.
In order to make the ADC operational again an ADC Soft-Reset must be issued.
Once this bit is set it can not be cleared by writing any value. It is cleared only by ADC hardware after the Soft-
Reset has been executed.
0 No ADC Soft-Reset issued.
1 Issue ADC Soft-Reset.
13
FRZ_MOD
Freeze Mode Configuration — This bit influences conversion flow during Freeze Mode.
0 ADC continues conversion in Freeze Mode.
1 ADC freezes the conversion at next conversion boundary at Freeze Mode entry.
12
SWAI
Wait Mode Configuration — This bit influences conversion flow during Wait Mode.
0 ADC continues conversion in Wait Mode.
1 ADC halts the conversion at next conversion boundary at Wait Mode entry.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 365
NOTE
Each conversion flow control bit (SEQA, RSTA, TRIG, LDOK) must be
controlled by software or internal interface according to the requirements
described in Section 9.6.3.2.4, “The two conversion flow control Mode
Configurations and overview summary in Table 9-11.
11-10
ACC_CFG[1:0] ADCFLWCTL Register Access Configuration — These bits define if the register ADCFLWCTL is controlled
via internal interface only or data bus only or both. See Tab l e 9 -4 . for more details.
9
STR_SEQA
Control Of Conversion Result Storage and RSTAR_EIF flag setting at Sequence Abort or Restart Event
— This bit controls conversion result storage and RSTAR_EIF flag setting when a Sequence Abort Event or
Restart Event occurs as follows:
If STR_SEQA = 1’b0 and if a:
Sequence Abort Event or Restart Event is issued during a conversion the data of this conversion is not stored
and the respective conversion complete flag is not set
Restart Event only is issued before the last conversion of a CSL is finished and no Sequence Abort Event is
in process (SEQA clear) causes the RSTA_EIF error flag to be asserted and bit SEQA gets set by hardware
If STR_SEQA = 1’b1 and if a:
Sequence Abort Event or Restart Event is issued during a conversion the data of this conversion is stored and
the respective conversion complete flag is set and Intermediate Result Information Register is updated.
Restart Event only occurs during the last conversion of a CSL and no Sequence Abort Event is in process
(SEQA clear) does not set the RSTA_EIF error flag
Restart Event only is issued before the CSL is finished and no Sequence Abort Event is in process (SEQA
clear) causes the RSTA_EIF error flag to be asserted and bit SEQA gets set by hardware
8
MOD_CFG
(Conversion Flow Control) Mode Configuration This bit defines the conversion flow control after a Restart
Event and after execution of the “End Of List” command type:
- Restart Mode
- Trigger Mode
(For more details please see also section Section 9.6.3.2, “Introduction of the Programmer’s Model and
following.)
0 “Restart Mode” selected.
1 “Trigger Mode” selected.
Table 9-4. ADCFLWCTL Register Access Configurations
ACC_CFG[1] ACC_CFG[0] ADCFLWCTL Access Mode
00 None of the access paths is enabled
(default / reset configuration)
01 Single Access Mode - Internal Interface
(ADCFLWCTL access via internal interface only)
10 Single Access Mode - Data Bus
(ADCFLWCTL access via data bus only)
11 Dual Access Mode
(ADCFLWCTL register access via internal interface and data bus)
Table 9-3. ADCCTL_0 Field Descriptions (continued)
Field Description
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
366 Freescale Semiconductor
9.5.2.2 ADC Control Register 1 (ADCCTL_1)
Read: Anytime
Write:
Bit CSL_BMOD and RVL_BMOD writable if bit ADC_EN clear or bit SMOD_ACC set
Bit SMOD_ACC only writable in MCU Special Mode
Bit AUT_RSTA writable anytime
Module Base + 0x0001
76543210
RCSL_BMOD RVL_BMOD SMOD_ACC AUT_RSTA 0000
W
Reset00000000
= Unimplemented or Reserved
Figure 9-5. ADC Control Register 1 (ADCCTL_1)
Table 9-5. ADCCTL_1 Field Descriptions
Field Description
7
CSL_BMOD
CSL Buffer Mode Select Bit — This bit defines the CSL buffer mode. This bit is only writable if ADC_EN is clear.
0 CSL single buffer mode.
1 CSL double buffer mode.
6
RVL_BMOD
RVL Buffer Mode Select Bit — This bit defines the RVL buffer mode.
0 RVL single buffer mode
1 RVL double buffer mode
5
SMOD_ACC
Special Mode Access Control Bit — This bit controls register access rights in MCU Special Mode. This bit is
automatically cleared when leaving MCU Special Mode.
Note: When this bit is set also the ADCCMD register is writeable via the data bus to allow modification of the
current command for debugging purpose. But this is only possible if the current command is not already
processed (conversion not started).
Please see access details given for each register.
Care must be taken when modifying ADC registers while bit SMOD_ACC is set to not corrupt a possible ongoing
conversion.
0 Normal user access - Register write restrictions exist as specified for each bit.
1 Special access - Register write restrictions are lifted.
4
AUT_RSTA
Automatic Restart Event after exit from MCU Stop and Wait Mode (SWAI set) This bit controls if a Restart
Event is automatically generated after exit from MCU Stop Mode or Wait Mode with bit SWAI set. It can be
configured for ADC conversion flow control mode
“Trigger Mode” and “Restart Mode” (anytime during application
runtime).
0 No automatic Restart Event after exit from MCU Stop Mode.
1 Automatic Restart Event occurs after exit from MCU Stop Mode.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 367
9.5.2.3 ADC Status Register (ADCSTS)
It is important to note that if flag DBECC_ERR is set the ADC ceases operation. In order to make the ADC
operational again an ADC Soft-Reset must be issued. An ADC Soft-Reset clears bits CSL_SEL and
RVL_SEL.
Read: Anytime
Write:
Bits CSL_SEL and RVL_SEL anytime if bit ADC_EN is clear or bit SMOD_ACC is set
Bits DBECC_ERR and READY not writable
Module Base + 0x0002
76543210
RCSL_SEL RVL_SEL DBECC_ERR Reserved READY 0 0 0
W
Reset00001000
= Unimplemented or Reserved
Figure 9-6. ADC Status Register (ADCSTS)
Table 9-6. ADCSTS Field Descriptions
Field Description
7
CSL_SEL Command Sequence List Select bit — This bit controls and indicates which ADC Command List is active. This
bit can only be written if ADC_EN bit is clear. This bit toggles in CSL double buffer mode when no conversion or
conversion sequence is ongoing and bit LDOK is set and bit RSTA is set. In CSL single buffer mode this bit is
forced to 1’b0 by bit CSL_BMOD.
0 ADC Command List 0 is active.
1 ADC Command List 1 is active.
6
RVL_SEL Result Value List Select Bit This bit controls and indicates which ADC Result List is active. This bit can only
be written if bit ADC_EN is clear. After storage of the initial Result Value List this bit toggles in RVL double buffer
mode whenever the conversion result of the first conversion of the current CSL is stored or a CSL got aborted.
In RVL single buffer mode this bit is forced to 1’b0 by bit RVL_BMOD.
Please see also Section 9.3.1.2, “MCU Operating Modes for information regarding Result List usage in case of
Stop or Wait Mode.
0 ADC Result List 0 is active.
1 ADC Result List 1 is active.
5
DBECC_ERR Double Bit ECC Error Flag This flag indicates that a double bit ECC error occurred during conversion
command load or result storage and ADC ceases operation.
In order to make the ADC operational again an ADC Soft-Reset must be issued.
This bit is cleared if bit ADC_EN is clear.
0 No double bit ECC error occurred.
1 A double bit ECC error occurred.
3
READY
Ready For Restart Event Flag — This flag indicates that ADC is in its idle state and ready for a Restart Event.
It can be used to verify after exit from Wait Mode if a Restart Event can be issued and processed immediately
without any latency time due to an ongoing Sequence Abort Event after exit from MCU Wait Mode (see also the
Note in Section 9.3.1.2, “MCU Operating Modes).
0 ADC not in idle state.
1 ADC is in idle state.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
368 Freescale Semiconductor
9.5.2.4 ADC Timing Register (ADCTIM)
Read: Anytime
Write: These bits are writable if bit ADC_EN is clear or bit SMOD_ACC is set
Module Base + 0x0003
76543210
R0 PRS[6:0]
W
Reset00000101
= Unimplemented or Reserved
Figure 9-7. ADC Timing Register (ADCTIM))
Table 9-7. ADCTIM Field Descriptions
Field Description
6-0
PRS[6:0]
ADC Clock Prescaler — These 7bits are the binary prescaler value PRS. The ADC conversion clock frequency
is calculated as follows:
Refer to Device Specification for allowed frequency range of fATDCLK.
fATDCLK
fBUS
2x PRS 1+
------------------------------------=
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 369
9.5.2.5 ADC Format Register (ADCFMT)
Read: Anytime
Write: Bits DJM and SRES[2:0] are writable if bit ADC_EN clear or bit SMOD_ACC set
Module Base + 0x0004
76543210
RDJM 0000 SRES[2:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 9-8. ADC Format Register (ADCFMT)
Table 9-8. ADCFMT Field Descriptions
Field Description
7
DJM
Result Register Data Justification — Conversion result data format is always unsigned. This bit controls
justification of conversion result data in the conversion result list.
0 Left justified data in the conversion result list.
1 Right justified data in the conversion result list.
2-0
SRES[2:0]
ADC Resolution Select — These bits select the resolution of conversion results. See Tabl e 9- 9 for coding.
Table 9-9. Selectable Conversion Resolution
SRES[2] SRES[1] SRES[0] ADC Resolution
0 0 0 8-bit data
0 0 1 Reserved1.
0 1 0 10-bit data
0 1 1 Reserved1.
1 0 0 12-bit data
1 x x Reserved(1)
1. Reserved settings cause a severe error at ADC conversion start whereby
the CMD_EIF flag is set and ADC ceases operation
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
370 Freescale Semiconductor
9.5.2.6 ADC Conversion Flow Control Register (ADCFLWCTL)
Bit set and bit clear instructions should not be used to access this register.
When the ADC is enabled the bits of ADCFLWCTL register can be modified after a latency time of three
Bus Clock cycles.
All bits are cleared if bit ADC_EN is clear or via ADC soft-reset.
Read: Anytime
Write:
Bits SEQA, TRIG, RSTA, LDOK can only be set if bit ADC_EN is set.
Writing 1’b0 to any of these bits does not have an effect
Timing considerations (Trigger Event - channel sample start) depending on ADC mode configuration:
Restart Mode
When the Restart Event has been processed (initial command of current CSL is loaded) it takes two
Bus Clock cycles plus two ADC conversion clock cycles (pump phase) from the T rigger Event (bit
TRIG set) until the select channel starts to sample.
During a conversion sequence (back to back conversions) it takes five Bus Clock cycles plus two
ADC conversion clock cycles (pump phase) from current conversion period end until the newly
selected channel is sampled in the following conversion period.
Trigger Mode
When a Restart Event occurs a Trigger Event is issued simultaneously . The time required to process
the Restart Event is mainly defined by the internal read data bus availability and therefore can vary.
In this mode the Trigger Event is processed immediately after the Restart Event is finished and both
conversion flow control bits are cleared simultaneously . From de-assert of bit TRIG until sampling
begins five Bus Clock cycles are required. Hence from occurrence of a Restart Event until channel
sampling it takes five Bus Clock cycles plus an uncertainty of a few Bus Clock cycles.
For more details regarding the sample phase please refer to Section 9.6.2.2, “Sample and Hold Machine
with Sample Buffer Amplifier.
Module Base + 0x0005
76543210
RSEQA TRIG RSTA LDOK 0000
W
Reset00000000
= Unimplemented or Reserved
Figure 9-9. ADC Conversion Flow Control Register (ADCFLWCTL)
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 371
Table 9-10. ADCFLWCTL Field Descriptions
Field Description
7
SEQA
Conversion Sequence Abort Event — This bit indicates that a conversion sequence abort event is in progress.
When this bit is set the ongoing conversion sequence and current CSL will be aborted at the next conversion
boundary. This bit gets cleared when the ongoing conversion sequence is aborted and ADC is idle.
This bit can only be set if bit ADC_EN is set.
This bit is cleared if bit ADC_EN is clear.
Data Bus Control:
This bit can be controlled via the data bus if access control is configured accordingly via ACC_CFG[1:0].
Writing a value of 1’b0 does not clear the flag.
Writing a one to this bit does not clear it but causes an overrun if the bit has already been set. See
Section 9.6.3.2.6, “Conversion flow control in case of conversion sequence control bit overrun scenarios for more
details.
Internal Interface Control:
This bit can be controlled via the internal interface Signal “Seq_Abort” if access control is configured accordingly
via ACC_CFG[1:0]. After being set an additional request via the internal interface Signal “Seq_Abort” causes an
overrun. See also conversion flow control in case of overrun situations.
General:
In both conversion flow control modes (Restart Mode and Trigger Mode) when bit RSTA gets set automatically
bit SEQA gets set when the ADC has not reached one of the following scenarios:
- A Sequence Abort request is about to be executed or has been executed.
- “End Of List” command type has been executed or is about to be executed
In case bit SEQA is set automatically the Restart error flag RSTA_EIF is set to indicate an unexpected Restart
Request.
0 No conversion sequence abort request.
1 Conversion sequence abort request.
6
TRIG
Conversion Sequence Trigger Bit — This bit starts a conversion sequence if set and no conversion or
conversion sequence is ongoing. This bit is cleared when the first conversion of a sequence starts to sample.
This bit can only be set if bit ADC_EN is set.
This bit is cleared if bit ADC_EN is clear.
Data Bus Control:
This bit can be controlled via the data bus if access control is configured accordingly via ACC_CFG[1:0].
Writing a value of 1’b0 does not clear the flag.
After being set this bit can not be cleared by writing a value of 1’b1 instead the error flag TRIG_EIF is set. See
also Section 9.6.3.2.6, “Conversion flow control in case of conversion sequence control bit overrun scenarios for
more details.
Internal Interface Control:
This bit can be controlled via the internal interface Signal “Trigger” if access control is configured accordingly via
ACC_CFG[1:0]. After being set an additional request via internal interface Signal “Trigger“ causes the flag
TRIG_EIF to be set.
0 No conversion sequence trigger.
1 Trigger to start conversion sequence.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
372 Freescale Semiconductor
5
RSTA
Restart Event (Restart from Top of Command Sequence List) — This bit indicates that a Restart Event is
executed. The ADC loads the conversion command from top of the active Sequence Command List when no
conversion or conversion sequence is ongoing. This bit is cleared when the first conversion command of the
sequence from top of active Sequence Command List has been loaded into the ADCCMD register.
This bit can only be set if bit ADC_EN is set.
This bit is cleared if bit ADC_EN is clear.
Data Bus Control:
This bit can be controlled via the data bus if access control is configured accordingly via ACC_CFG[1:0].
Writing a value of 1’b0 does not clear the flag.
Writing a one to this bit does not clear it but causes an overrun if the bit has already been set. See also
Section 9.6.3.2.6, “Conversion flow control in case of conversion sequence control bit overrun scenarios for more
details.
Internal Interface Control:
This bit can be controlled via the internal interface Signal “Restart” if access control is configured accordingly via
ACC_CFG[1:0]. After being set an additional request via internal interface Signal “Restart“ causes an overrun.
See conversion flow control in case of overrun situations for more details.
General:
In conversion flow control mode “Trigger Mode” when bit RSTA gets set bit TRIG is set simultaneously if one of
the following has been executed:
- “End Of List” command type has been executed or is about to be executed
- Sequence Abort Event
0 Continue with commands from active Sequence Command List.
1 Restart from top of active Sequence Command List.
4
LDOK
Load OK for alternative Command Sequence List — This bit indicates if the preparation of the alternative
Sequence Command List is done and Command Sequence List must be swapped with the Restart Event. This
bit is cleared when bit RSTA is set (Restart Event executed) and the Command Sequence List got swapped.
This bit can only be set if bit ADC_EN is set.
This bit is cleared if bit ADC_EN is clear.
This bit is forced to zero if bit CSL_BMOD is clear.
Data Bus Control:
This bit can be controlled via the data bus if access control is configured accordingly via ACC_CFG[1:0].
Writing a value of 1’b0 does not clear the flag.
To set bit LDOK the bits LDOK and RSTA must be written simultaneously.
After being set this bit can not be cleared by writing a value of 1’b1. See also Section 9.6.3.2.6, “Conversion flow
control in case of conversion sequence control bit overrun scenarios for more details.
Internal Interface Control:
This bit can be controlled via the internal interface Signal “LoadOK” and “Restart” if access control is configured
accordingly via ACC_CFG[1:0]. With the assertion of Interface Signal “Restart” the interface Signal “LoadOK” is
evaluated and bit LDOK set accordingly (bit LDOK set if Interface Signal “LoadOK” asserted when Interface
Signal “Restart” asserts).
General:
Only in “Restart Mode” if a Restart Event occurs without bit LDOK being set the error flag LDOK_EIF is set except
when the respective Restart Request occurred after or simultaneously with a Sequence Abort Request.
The LDOK_EIF error flag is also not set in “Restart Mode” if the first Restart Event occurs after:
- ADC got enabled
- Exit from Stop Mode
- ADC Soft-Reset
0 Load of alternative list done.
1 Load alternative list.
Table 9-10. ADCFLWCTL Field Descriptions (continued)
Field Description
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 373
For a detailed description of all conversion flow control bit scenarios please see also Section 9.6.3.2.4,
“The two conversion flow control Mode Configurations, Section 9.6.3.2.5, “The four ADC conversion
flow control bits and Section 9.6.3.2.6, “Conversion flow control in case of conversion sequence control
bit overrun scenarios
Table 9-11. Summary of Conversion Flow Control Bit Scenarios
RSTA TRIG SEQA LDOK Conversion Flow
Control Mode
Conversion Flow Control
Scenario
0 0 0 0 Both Modes Valid
0 0 0 1 Both Modes Can Not Occur
0 0 1 0 Both Modes Valid5.
0 0 1 1 Both Modes Can Not Occur
0 1 0 0 Both Modes Valid2.
0 1 0 1 Both Modes Can Not Occur
0 1 1 0 Both Modes Can Not Occur
0 1 1 1 Both Modes Can Not Occur
1 0 0 0 Both Modes Valid4.
1 0 0 1 Both Modes Valid1. 4.
1 0 1 0 Both Modes Valid3. 4. 5.
1 0 1 1 Both Modes Valid1. 3. 4. 5.
1100
“Restart Mode” Error flag TRIG_EIF set
“Trigger Mode” Valid2. 4. 6.
1101
“Restart Mode” Error flag TRIG_EIF set
“Trigger Mode” Valid1. 2. 4. 6.
1110
“Restart Mode” Error flag TRIG_EIF set
“Trigger Mode” Valid2. 3. 4. 5. 6.
1111
“Restart Mode” Error flag TRIG_EIF set
“Trigger Mode” Valid(1) (2) (3) (4) (5) (6)
1. Swap CSL buffer
2. Start conversion sequence
3. Prevent RSTA_EIF and LDOK_EIF
4. Load conversion command from top of CSL
5. Abort any ongoing conversion, conversion sequence and CSL
6. Bit TRIG set automatically in Trigger Mode
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
374 Freescale Semiconductor
9.5.2.7 ADC Error Interrupt Enable Register (ADCEIE)
Read: Anytime
Write: Anytime
Module Base + 0x0006
76543210
RIA_EIE CMD_EIE EOL_EIE Reserved TRIG_EIE RSTAR_EIE LDOK_EIE 0
W
Reset00000000
= Unimplemented or Reserved
Figure 9-10. ADC Error Interrupt Enable Register (ADCEIE)
Table 9-12. ADCEIE Field Descriptions
Field Description
7
IA_EIE
Illegal Access Error Interrupt Enable Bit — This bit enables the illegal access error interrupt.
0 Illegal access error interrupt disabled.
1 Illegal access error interrupt enabled.
6
CMD_EIE
Command Value Error Interrupt Enable Bit — This bit enables the command value error interrupt.
0 Command value interrupt disabled.
1 Command value interrupt enabled.
5
EOL_EIE
”End Of List” Error Interrupt Enable Bit This bit enables the “End Of List” error interrupt.
0 “End Of List” error interrupt disabled.
1 “End Of List” error interrupt enabled.
3
TRIG_EIE
Conversion Sequence Trigger Error Interrupt Enable Bit This bit enables the conversion sequence trigger
error interrupt.
0 Conversion sequence trigger error interrupt disabled.
1 Conversion sequence trigger error interrupt enabled.
2
RSTAR_EIE
Restart Request Error Interrupt Enable Bit— This bit enables the restart request error interrupt.
0 Restart Request error interrupt disabled.
1 Restart Request error interrupt enabled.
1
LDOK_EIE
Load OK Error Interrupt Enable Bit — This bit enables the Load OK error interrupt.
0 Load OK error interrupt disabled.
1 Load OK error interrupt enabled.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 375
9.5.2.8 ADC Interrupt Enable Register (ADCIE)
Read: Anytime
Write: Anytime
Module Base + 0x0007
76543210
RSEQAD_IE CONIF_OIE Reserved 00000
W
Reset00000000
= Unimplemented or Reserved
Figure 9-11. ADC Interrupt Enable Register (ADCIE)
Table 9-13. ADCIE Field Descriptions
Field Description
7
SEQAD_IE
Conversion Sequence Abort Done Interrupt Enable Bit — This bit enables the conversion sequence abort
event done interrupt.
0 Conversion sequence abort event done interrupt disabled.
1 Conversion sequence abort event done interrupt enabled.
6
CONIF_OIE ADCCONIF Register Flags Overrun Interrupt Enable — This bit enables the flag which indicates if an overrun
situation occurred for one of the CON_IF[15:1] flags or for the EOL_IF flag.
0 No ADCCONIF Register Flag overrun occurred.
1 ADCCONIF Register Flag overrun occurred.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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376 Freescale Semiconductor
9.5.2.9 ADC Error Interrupt Flag Register (ADCEIF)
If one of the following error flags is set the ADC ceases operation:
•IA_EIF
•CMD_EIF
•EOL_EIF
•TRIG_EIF
In order to make the ADC operational again an ADC Soft-Reset must be issued which clears above listed
error interrupt flags.
The error interrupt flags RSTAR_EIF and LDOK_EIF do not cause the ADC to cease operation. If set the
ADC continues operation. Each of the two bits can be cleared by writing a value of 1’b1. Both bits are also
cleared if an ADC Soft-Reset is issued.
All bits are cleared if bit ADC_EN is clear. W riting any flag with value 1’b0 does not clear a flag. W riting
any flag with value 1’b1 does not set the flag.
Read: Anytime
Write:
Bits RSTAR_EIF and LDOK_EIF are writable anytime
Bits IA_EIF, CMD_EIF, EOL_EIF and TRIG_EIF are not writable
Module Base + 0x0008
76543210
RIA_EIF CMD_EIF EOL_EIF Reserved TRIG_EIF RSTAR_EIF LDOK_EIF 0
W
Reset00000000
= Unimplemented or Reserved
Figure 9-12. ADC Error Interrupt Flag Register (ADCEIF)
Table 9-14. ADCEIF Field Descriptions
Field Description
7
IA_EIF
Illegal Access Error Interrupt Flag — This flag indicates that storing the conversion result caused an illegal
access error or conversion command loading from outside system RAM or NVM area occurred.
The ADC ceases operation if this error flag is set (issue of type severe).
0 No illegal access error occurred.
1 An illegal access error occurred.
6
CMD_EIF
Command Value Error Interrupt Flag — This flag indicates that an invalid command is loaded (Any command
that contains reserved bit settings) or illegal format setting selected (reserved SRES[2:0] bit settings).
The ADC ceases operation if this error flag is set (issue of type severe).
0 Valid conversion command loaded.
1 Invalid conversion command loaded.
5
EOL_EIF
“End Of List” Error Interrupt Flag — This flag indicates a missing “End Of List” command type in current
executed CSL.
The ADC ceases operation if this error flag is set (issue of type severe).
0 No “End Of List” error.
1 “End Of List” command type missing in current executed CSL.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 377
3
TRIG_EIF
Trigger Error Interrupt Flag — This flag indicates that a trigger error occurred.
This flag is set in “Restart” Mode when a conversion sequence got aborted and no Restart Event occurred before
the Trigger Event or if the Trigger Event occurred before the Restart Event was finished (conversion command
has been loaded).
This flag is set in “Trigger” Mode when a Trigger Event occurs before the Restart Event is issued to start
conversion of the initial Command Sequence List. In “Trigger” Mode only a Restart Event is required to start
conversion of the initial Command Sequence List.
This flag is set when a Trigger Event occurs before a conversion sequence got finished.
This flag is also set if a Trigger occurs while a Trigger Event is just processed - first conversion command of a
sequence is beginning to sample (see also Section 9.6.3.2.6, “Conversion flow control in case of conversion
sequence control bit overrun scenarios).
This flag is also set if the Trigger Event occurs automatically generated by hardware in “Trigger Mode” due to a
Restart Event and simultaneously a Trigger Event is generated via data bus or internal interface.
The ADC ceases operation if this error flag is set (issue of type severe).
0 No trigger error occurred.
1 A trigger error occurred.
2
RSTAR_EIF
Restart Request Error Interrupt Flag This flag indicates a flow control issue. It is set when a Restart Request
occurs after a Trigger Event and before one of the following conditions was reached:
- The “End Of List” command type has been executed
- Depending on bit STR_SEQA if the “End Of List” command type is about to be executed
- The current CSL has been aborted or is about to be aborted due to a Sequence Abort Request.
The ADC continues operation if this error flag is set.
This flag is not set for Restart Request overrun scenarios (see also Section 9.6.3.2.6, “Conversion flow control
in case of conversion sequence control bit overrun scenarios).
0 No Restart request error situation occurred.
1 Restart request error situation occurred.
1
LDOK_EIF
Load OK Error Interrupt Flag — This flag can only be set in “Restart Mode”. It indicates that a Restart Request
occurred without LDOK. This flag is not set if a Sequence Abort Event is already in process (bit SEQA set) when
the Restart Request occurs or a Sequence Abort Request occurs simultaneously with the Restart Request.
The LDOK_EIF error flag is also not set in “Restart Mode” if the first Restart Event occurs after:
- ADC got enabled
- Exit from Stop Mode
- ADC Soft-Reset
- ADC used in CSL single buffer mode
The ADC continues operation if this error flag is set.
0 No Load OK error situation occurred.
1 Load OK error situation occurred.
Table 9-14. ADCEIF Field Descriptions (continued)
Field Description
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
378 Freescale Semiconductor
9.5.2.10 ADC Interrupt Flag Register (ADCIF)
After being set any of these bits can be cleared by writing a value of 1’b1 or via ADC soft-reset (bit
ADC_SR). All bits are cleared if bit ADC_EN is clear . W r iting any flag with value 1’b0 does not clear the
flag. Writing any flag with value 1’b1 does not set the flag.
Read: Anytime
Write: Anytime
NOTE
In RVL double buffer mode a conversion interrupt flag (CON_IF[15:1]) or
End Of List interrupt flag (EOL_IF) overrun is detected if one of these bits
is set when it should be set again due to conversion command execution.
In RVL single buffer mode a conversion interrupt flag (CON_IF[15:1])
overrun is detected only. The overrun is detected if any of the conversion
interrupt flags (CON_IF[15:1]) is set while the first conversion result of a
CSL is stored (result of first conversion from top of CSL is stored).
Module Base + 0x0009
76543210
RSEQAD_IF CONIF_OIF Reserved 00000
W
Reset00000000
= Unimplemented or Reserved
Figure 9-13. ADC Interrupt Flag Register (ADCIF)
Table 9-15. ADCIF Field Descriptions
Field Description
7
SEQAD_IF
Conversion Sequence Abort Done Interrupt Flag This flag is set when the Sequence Abort Event has been
executed except the Sequence Abort Event occurred by hardware in order to be able to enter MCU Stop Mode
or Wait Mode with bit SWAI set.This flag is also not set if the Sequence Abort request occurs during execution
of the last conversion command of a CSL and bit STR_SEQA being set.
0 No conversion sequence abort request occurred.
1 A conversion sequence abort request occurred.
6
CONIF_OIF ADCCONIF Register Flags Overrun Interrupt Flag — This flag indicates if an overrun situation occurred for
one of the CON_IF[15:1] flags or for the EOL_IF flag. In RVL single buffer mode (RVL_BMOD clear) an overrun
of the EOL_IF flag is not indicated (For more information please see Note below).
0 No ADCCONIF Register Flag overrun occurred.
1 ADCCONIF Register Flag overrun occurred.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 379
9.5.2.11 ADC Conversion Interrupt Enable Register (ADCCONIE)
Read: Anytime
Write: Anytime
Module Base + 0x000A
151413121110987654321 0
RCON_IE[15:1] EOL_IE
W
Reset000000000000000 0
= Unimplemented or Reserved
Figure 9-14. ADC Conversion Interrupt Enable Register (ADCCONIE)
Table 9-16. ADCCONIE Field Descriptions
Field Description
15-1
CON_IE[15:1] Conversion Interrupt Enable Bits — These bits enable the individual interrupts which can be triggered via
interrupt flags CON_IF[15:1].
0 ADC conversion interrupt disabled.
1 ADC conversion interrupt enabled.
0
EOL_IE
End Of List Interrupt Enable Bit — This bit enables the end of conversion sequence list interrupt.
0 End of list interrupt disabled.
1 End of list interrupt enabled.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
380 Freescale Semiconductor
9.5.2.12 ADC Conversion Interrupt Flag Register (ADCCONIF)
After being set any of these bits can be cleared by writing a value of 1’b1. All bits are cleared if bit
ADC_EN is clear or via ADC soft-reset (bit ADC_SR set). W riting any flag with value 1’b0 does not clear
the flag. Writing any flag with value 1’b1 does not set the flag.
Read: Anytime
Write: Anytime
NOTE
These bits can be used to indicate if a certain packet of conversion results is
available. Clearing a flag indicates that conversion results have been
retrieved by software and the flag can be used again (see also Section 9.9.6,
“RVL swapping in RVL double buffer mode and related registers
ADCIMDRI and ADCEOLRI.
NOTE
Overrun situation of a flag CON_IF[15:1] and EOL_IF are indicated by flag
CONIF_OIF.
Module Base + 0x000C
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RCON_IF[15:1] EOL_IF
W
Reset000000000000000 0
= Unimplemented or Reserved
Figure 9-15. ADC Conversion Interrupt Flag Register (ADCCONIF)
Table 9-17. ADCCONIF Field Descriptions
Field Description
15-1
CON_IF[15:1] Conversion Interrupt Flags — These bits could be set by the binary coded interrupt select bits
INTFLG_SEL[3:0] when the corresponding conversion command has been processed and related data has been
stored to RAM.
See also notes below.
0
EOL_IF
End Of List Interrupt Flag — This bit is set by the binary coded conversion command type select bits
CMD_SEL[1:0] for “end of list” type of commands and after such a command has been processed and the related
data has been stored RAM.
See also second note below
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 381
9.5.2.13 ADC Intermediate Result Information Register (ADCIMDRI)
This register is cleared when bit ADC_SR is set or bit ADC_EN is clear.
Read: Anytime
Write: Never
NOTE
The register ADCIMDRI is updated and simultaneously a conversion
interrupt flag CON_IF[15:1] occurs when the corresponding conversion
command (conversion command with INTFLG_SEL[3:0] set) has been
processed and related data has been stored to RAM.
Module Base + 0x000E
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RCSL_IMD RVL_IMD 0000000 0 RIDX_IMD[5:0]
W
Reset0 0 0000000000000 0
= Unimplemented or Reserved
Figure 9-16. ADC Intermediate Result Information Register (ADCIMDRI)
Table 9-18. ADCIMDRI Field Descriptions
Field Description
15
CSL_IMD
Active CSL At Intermediate Event This bit indicates the active (used) CSL at the occurrence of a conversion
interrupt flag (CON_IF[15:1]) (occurrence of an intermediate result buffer fill event) or when a Sequence Abort
Event gets executed.
0 CSL_0 active (used) when a conversion interrupt flag (CON_IF[15:1]) got set.
1 CSL_1 active (used) when a conversion interrupt flag (CON_IF[15:1]) got set.
14
RVL_IMD
Active RVL At Intermediate Event — This bit indicates the active (used) RVL buffer at the occurrence of a
conversion interrupt flag (CON_IF[15:1]) (occurrence of an intermediate result buffer fill event) or when a
Sequence Abort Event gets executed.
0 RVL_0 active (used) when a conversion interrupt flag (CON_IF[15:1]) got set.
1 RVL_1 active (used) when a conversion interrupt flag (CON_IF[15:1]) got set.
5-0
RIDX_IMD[5:0] RES_IDX Value At Intermediate Event — These bits indicate the result index (RES_IDX) value at the
occurrence of a conversion interrupt flag (CON_IF[15:1]) (occurrence of an intermediate result buffer fill event)
or occurrence of EOL_IF flag or when a Sequence Abort Event gets executed to abort an ongoing conversion
(the result index RES_IDX is captured at the occurrence of a result data store).
When a Sequence Abort Event has been processed flag SEQAD_IF is set and the RES_IDX value of the last
stored result is provided. Hence in case an ongoing conversion is aborted the RES_IDX value captured in
RIDX_IMD bits depends on bit STORE_SEQA:
- STORE_SEQA =1: The result index of the aborted conversion is provided
- STORE_SEQA =0: The result index of the last stored result at abort execution time is provided
In case a CSL is aborted while no conversion is ongoing (ADC waiting for a Trigger Event) the last captured result
index is provided.
In case a Sequence Abort Event was initiated by hardware due to MCU entering Stop Mode or Wait Mode with
bit SWAI set, the result index of the last stored result is captured by bits RIDX_IMD but flag SEQAD_IF is not set.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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382 Freescale Semiconductor
9.5.2.14 ADC End Of List Result Information Register (ADCEOLRI)
This register is cleared when bit ADC_SR is set or bit ADC_EN is clear.
Read: Anytime
Write: Never
NOTE
The conversion interrupt EOL_IF occurs and simultaneously the register
ADCEOLRI is updated when the “End Of List” conversion command type
has been processed and related data has been stored to RAM.
Module Base + 0x0010
76543210
RCSL_EOL RVL_EOL 000000
W
Reset00000000
= Unimplemented or Reserved
Figure 9-17. ADC End Of List Result Information Register (ADCEOLRI)
Table 9-19. ADCEOLRI Field Descriptions
Field Description
7
CSL_EOL
Active CSL When “End Of List” Command Type Executed — This bit indicates the active (used) CSL when
a “End Of List” command type has been executed and related data has been stored to RAM.
0 CSL_0 active when “End Of List” command type executed.
1 CSL_1 active when “End Of List” command type executed.
6
RVL_EOL
Active RVL When “End Of List” Command Type Executed This bit indicates the active (used) RVL when
a “End Of List” command type has been executed and related data has been stored to RAM.
0 RVL_0 active when “End Of List” command type executed.
1 RVL_1 active when “End Of List” command type executed.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 383
9.5.2.15 ADC Command Register 0 (ADCCMD_0)
Read: Anytime
Write: Only writable if bit SMOD_ACC is set
(see also Section 9.5.2.2, “ADC Control Register 1 (ADCCTL_1) bit SMOD_ACC description for more
details)
NOTE
If bit SMOD_ACC is set modifying this register must be done carefully -
only when no conversion and conversion sequence is ongoing.
Module Base + 0x0014
3 1 30 29 28 27 26 25 24
RCMD_SEL 00 INTFLG_SEL[3:0]
W
RCMD_SEL OPT[1:0](1)
1. Only available on ADC12B_LBA V2 and V3 (see Table 9-2 for details)
INTFLG_SEL[3:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 9-18. ADC Command Register 0 (ADCCMD_0)
Table 9-20. ADCCMD_0 Field Descriptions
Field Description
31-30
CMD_SEL[1:0]
Conversion Command Select Bits These bits define the type of current conversion described in Ta bl e 9- 21 .
ADC12B_LBA V2 and V3 (includes OPT[1:0])
29-28
OPT[1:0]
Option Bits — These two option bits can be used to control a SoC level feature/function. These bits are used
together with Option bits OPT[2:3]. Please refer to the device reference manual for details of the
feature/functionality controlled by these bits
27-24
INTFLG_SEL[3:0] Conversion Interrupt Flag Select Bits — These bits define which interrupt flag is set in the ADCIFH/L register
at the end of current conversion.The interrupt flags ADCIF[15:1] are selected via binary coded bits
INTFLG_SEL[3:0]. See also Tab l e 9- 2 2
Table 9-21. Conversion Command Type Select
CMD_SEL[1] CMD_SEL[0] Conversion Command Type Description
0 0 Normal Conversion
01 End Of Sequence
(Wait for Trigger to execute next sequence or for a Restart)
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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384 Freescale Semiconductor
10
End Of List
(Automatic wrap to top of CSL
and Continue Conversion)
11
End Of List
(Wrap to top of CSL and:
- In “Restart Mode” wait for Restart Event followed by a Trigger
- In “Trigger Mode” wait for Trigger or Restart Event)
Table 9-21. Conversion Command Type Select
CMD_SEL[1] CMD_SEL[0] Conversion Command Type Description
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 385
Table 9-22. Conversion Interrupt Flag Select
CON_IF[15:1] INTFLG_SEL[3] INTFLG_SEL[2] INTFLG_SEL[1] INTFLG_SEL[0] Comment
0x0000 0 0 0 0 No flag set
0x0001 0 0 0 1
Only one flag can
be set
(one hot coding)
0x0002 0 0 1 0
0x0004 0 0 1 1
0x0008 0 1 0 0
0x0010 0 1 0 1
.... ... ... ... ...
0x0800 1 1 0 0
0x1000 1 1 0 1
0x2000 1 1 1 0
0x4000 1 1 1 1
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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386 Freescale Semiconductor
9.5.2.16 ADC Command Register 1 (ADCCMD_1)
A command which contains reserved bit settings causes the error flag CMD_EIF being set and ADC cease
operation.
Read: Anytime
Write: Only writable if bit SMOD_ACC is set
(see also Section 9.5.2.2, “ADC Control Register 1 (ADCCTL_1) bit SMOD_ACC description for more
details)
NOTE
If bit SMOD_ACC is set modifying this register must be done carefully -
only when no conversion and conversion sequence is ongoing.
Module Base + 0x0015
2 3 22 21 20 19 18 17 16
RVRH_SEL(1)
1. Only available on ADC12B_LBA V1 and V2 (see Table 9-2 for details)
VRL_SEL1. CH_SEL[5:0]
W
RVRH_SEL[1:0](2)
2. Only available on ADC12B_LBA V3 (see Ta bl e 9 -2 for details)
CH_SEL[5:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 9-19. ADC Command Register 1 (ADCCMD_1)
Table 9-23. ADCCMD_1 Field Descriptions
Field Description
ADC12B_LBA V1 and V2 (includes VRH_SEL/VRL_SEL)
23
VRH_SEL
Reference High Voltage Select Bit — This bit selects the high voltage reference for current conversion.
0 VRH_0 input selected as high voltage reference.
1 VRH_1 input selected as high voltage reference.
22
VRL_SEL
Reference Low Voltage Select Bit — This bit selects the low voltage reference for current conversion.
0 VRL_0 input selected as low voltage reference.
1 VRL_1 input selected as low voltage reference.
ADC12B_LBA V3 (includes VRH_SEL[1:0])
23-22
VRH_SEL
Reference High Voltage Select Bit — These bits select the high voltage reference for current conversion.
00 VRH_0 input selected as high voltage reference
01 VRH_1 input selected as high voltage reference
10 VRH_2 input selected as high voltage reference
11 Reserved
21-16
CH_SEL[5:0]
ADC Input Channel Select Bits — These bits select the input channel for the current conversion. See Table 9-
24 for channel coding information.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 387
NOTE
ANx in Table 9-24 is the maximum number of implemented analog input
channels on the device. Please refer to the device overview of the reference
manual for details regarding number of analog input channels.
Table 9-24. Analog Input Channel Select
CH_SEL[5] CH_SEL[4] CH_SEL[3] CH_SEL[2] CH_SEL[1] CH_SEL[0] Analog Input Channel
000000 VRL_0/1 (V1, V2, see Table 9-2)
VRL_0 (V3, see Tab l e 9-2 )
000001 VRH_0/1 (V1, V2, see Ta b le 9-2 )
VRH_0/1/2 (V3, see Table 9 - 2)
0 0 0 0 1 0 (VRH_0/1 + VRL_0/1) / 2 (V1, V2, see Tab l e 9-2)
(VRH_0/1/2 + VRL_0) / 2 (V3, see Tabl e 9 -2)
000011 Reserved
000100 Reserved
000101 Reserved
000110 Reserved
000111 Reserved
001000 Internal_0
(ADC temperature sense)
001001 Internal_1
001010 Internal_2
001011 Internal_3
001100 Internal_4
001101 Internal_5
001110 Internal_6
001111 Internal_7
010000 AN0
010001 AN1
010010 AN2
010011 AN3
010100 AN4
01xxxx ANx
1xxxxx Reserved
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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388 Freescale Semiconductor
9.5.2.17 ADC Command Register 2 (ADCCMD_2)
A command which contains reserved bit settings causes the error flag CMD_EIF being set and ADC cease
operation.
Read: Anytime
Write: Only writable if bit SMOD_ACC is set
(see also Section 9.5.2.2, “ADC Control Register 1 (ADCCTL_1) bit SMOD_ACC description for more
details)
NOTE
If bit SMOD_ACC is set modifying this register must be done carefully -
only when no conversion and conversion sequence is ongoing.
Module Base + 0x0016
1 5 14 13 12 11 10 9 8
RSMP[4:0] 00
Reserved
W
RSMP[4:0] OPT[3:2](1)
1. Only available on ADC12B_LBA V2 and V3 (see Table 9-2 for details)
Reserved
W
Reset00000000
= Unimplemented or Reserved
Figure 9-20. ADC Command Register 2 (ADCCMD_2)
Table 9-25. ADCCMD_2 Field Descriptions
Field Description
15-11
SMP[4:0]
Sample Time Select Bits — These four bits select the length of the sample time in units of ADC conversion
clock cycles. Note that the ADC conversion clock period is itself a function of the prescaler value (bits PRS[6:0]).
Table 9-26 lists the available sample time lengths.
ADC12B_LBA V2 and V3 (includes OPT[3:2])
10-9
OPT[3:2]
Option Bits — These two option bits can be used to control a SoC level feature/function. These bits are used
together with Option bits OPT[1:0]. Please refer to the device reference manual for details of the
feature/functionality controlled by these bits.
Table 9-26. Sample Time Select
SMP[4] SMP[3] SMP[2] SMP[1] SMP[0]
Sample Time
in Number of
ADC Clock Cycles
00000 4
00001 5
00010 6
00011 7
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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Freescale Semiconductor 389
00100 8
00101 9
00110 10
00111 11
01000 12
01001 13
01010 14
01011 15
01100 16
01101 17
01110 18
01111 19
10000 20
10001 21
10010 22
10011 23
10100 24
10101 Reserved
10110 Reserved
10111 Reserved
11xxx Reserved
Table 9-26. Sample Time Select
SMP[4] SMP[3] SMP[2] SMP[1] SMP[0]
Sample Time
in Number of
ADC Clock Cycles
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
390 Freescale Semiconductor
9.5.2.18 ADC Command Register 3 (ADCCMD_3)
Module Base + 0x0017
76543210
R Reserved Reserved Reserved
W
Reset00000000
= Unimplemented or Reserved
Figure 9-21. ADC Command Register 3 (ADCCMD_3)
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 391
9.5.2.19 ADC Command Index Register (ADCCIDX)
It is important to note that these bits do not represent absolute addresses instead it is a sample index (object
size 32bit).
Read: Anytime
Write: NA
Module Base + 0x001C
76543210
R 0 0 CMD_IDX[5:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 9-22. ADC Command Index Register (ADCCIDX)
Table 9-27. ADCCIDX Field Descriptions
Field Description
5-0
CMD_IDX
[5:0]
ADC Command Index Bits — These bits represent the command index value for the conversion commands
relative to the two CSL start addresses in the memory map. These bits do not represent absolute addresses
instead it is a sample index (object size 32bit). See also Section 9.6.3.2.2, “Introduction of the two Command
Sequence Lists (CSLs) for more details.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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392 Freescale Semiconductor
9.5.2.20 ADC Command Base Pointer Register (ADCCBP)
Read: Anytime
Write: Bits CMD_PTR[23:2] writable if bit ADC_EN clear or bit SMOD_ACC set
Module Base + 0x001D
2 3 22 21 20 19 18 17 16
R
CMD_PTR[23:16]
W
Reset00000000
Module Base + 0x001E
1 5 14 13 12 11 10 9 8
R
CMD_PTR[15:8]
W
Reset00000000
Module Base + 0x001F
76543210
RCMD_PTR[7:2] 00
W
Reset00000000
= Unimplemented or Reserved
Figure 9-23. ADC Command Base Pointer Registers (ADCCBP_0, ADCCBP_1, ADCCBP_2))
Table 9-28. ADCCBP Field Descriptions
Field Description
23-2
CMD_PTR [23:2] ADC Command Base Pointer Address — These bits define the base address of the two CSL areas inside the
system RAM or NVM of the memory map. They are used to calculate the final address from which the conversion
commands will be loaded depending on which list is active. For more details see Section 9.6.3.2.2, “Introduction
of the two Command Sequence Lists (CSLs).
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 393
9.5.2.21 ADC Result Index Register (ADCRIDX)
It is important to note that these bits do not represent absolute addresses instead it is a sample index (object
size 16bit).
Read: Anytime
Write: NA
Module Base + 0x0020
76543210
R 0 0 RES_IDX[5:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 9-24. ADC Result Index Register (ADCRIDX)
Table 9-29. ADCRIDX Field Descriptions
Field Description
5-0
RES_IDX[5:0] ADC Result Index Bits — These read only bits represent the index value for the conversion results relative to
the two RVL start addresses in the memory map. These bits do not represent absolute addresses instead it is a
sample index (object size 16bit). See also Section 9.6.3.2.3, “Introduction of the two Result Value Lists (RVLs)
for more details.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
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394 Freescale Semiconductor
9.5.2.22 ADC Result Base Pointer Register (ADCRBP)
Read: Anytime
Write: Bits RES_PTR[19:2] writeable if bit ADC_EN clear or bit SMOD_ACC set
Module Base + 0x0021
2 3 22 21 20 19 18 17 16
R0 0 0 0
RES_PTR[19:16]
W
Reset00000000
Module Base + 0x0022
1 5 14 13 12 11 10 9 8
R
RES_PTR[15:8]
W
Reset00000000
Module Base + 0x0023
76543210
RRES_PTR[7:2] 00
W
Reset00000000
= Unimplemented or Reserved
Figure 9-25. ADC Result Base Pointer Registers (ADCRBP_0, ADCRBP_1, ADCRBP_2))
Table 9-30. ADCRBP Field Descriptions
Field Description
19-2
RES_PTR[19:2]
ADC Result Base Pointer Address — These bits define the base address of the list areas inside the system
RAM of the memory map to which conversion results will be stored to at the end of a conversion. These bits can
only be written if bit ADC_EN is clear. See also Section 9.6.3.2.3, “Introduction of the two Result Value Lists
(RVLs).
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 395
9.5.2.23 ADC Command and Result Offset Register 0 (ADCCROFF0)
Read: Anytime
Write: NA
Module Base + 0x0024
76543210
R 0 CMDRES_OFF0[6:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 9-26. ADC Command and Result Offset Register 0 (ADCCROFF0)
Table 9-31. ADCCROFF0 Field Descriptions
Field Description
6-0
CMDRES_OFF0
[6:0]
ADC Command and Result Offset Value These read only bits represent the conversion command and result
offset value relative to the conversion command base pointer address and result base pointer address in the
memory map to refer to CSL_0 and RVL_0. It is used to calculate the address inside the system RAM to which
the result at the end of the current conversion is stored to and the area (RAM or NVM) from which the conversion
commands are loaded from. This is a zero offset (null offset) which can not be modified. These bits do not
represent absolute addresses instead it is a sample offset (object size 16bit for RVL, object size 32bit for CSL).
See also Section 9.6.3.2.2, “Introduction of the two Command Sequence Lists (CSLs) and Section 9.6.3.2.3,
“Introduction of the two Result Value Lists (RVLs) for more details.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
396 Freescale Semiconductor
9.5.2.24 ADC Command and Result Offset Register 1 (ADCCROFF1)
It is important to note that these bits do not represent absolute addresses instead it is an sample offset
(object size 16bit for RVL, object size 32bit for CSL).
Read: Anytime
Write: These bits are writable if bit ADC_EN clear or bit SMOD_ACC set
Module Base + 0x0025
76543210
R0 CMDRES_OFF1[6:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 9-27. ADC Command and Result Offset Register 1 (ADCCROFF1)
Table 9-32. ADCCROFF1 Field Descriptions
Field Description
6-0
CMDRES_OFF1
[6:0]
ADC Result Address Offset Value — These bits represent the conversion command and result offset value
relative to the conversion command base pointer address and result base pointer address in the memory map
to refer to CSL_1 and RVL_1. It is used to calculate the address inside the system RAM to which the result at
the end of the current conversion is stored to and the area (RAM or NVM) from which the conversion commands
are loaded from. These bits do not represent absolute addresses instead it is an sample offset (object size 16bit
for RVL, object size 32bit for CSL).,These bits can only be modified if bit ADC_EN is clear. See also
Section 9.6.3.2.2, “Introduction of the two Command Sequence Lists (CSLs) and Section 9.6.3.2.3, “Introduction
of the two Result Value Lists (RVLs) for more details.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 397
9.6 Functional Description
9.6.1 Overview
The ADC12B_LBA consists of an analog sub-block and a digital sub-block. It is a successive
approximation analog-to-digital converter including a sample-and-hold mechanism and an internal charge
scaled C-DAC (switched capacitor scaled digital-to-analog converter) with a comparator to realize the
successive approximation algorithm.
9.6.2 Analog Sub-Block
The analog sub-block contains all analog circuits (sample and hold, C-DAC, analog Comparator, and so
on) required to perform a single conversion. Separate power supplies VDDA and VSSA allow noise from
the MCU circuitry to be isolated from the analog sub-block for improved accuracy.
9.6.2.1 Analog Input Multiplexer
The analog input multiplexers connect one of the external or internal analog input channels to the sample
and hold storage node.
9.6.2.2 Sample and Hold Machine with Sample Buffer Amplifier
The Sample and Hold Machine controls the storage and charge of the storage node (sample capacitor) to
the voltage level of the analog signal at the selected ADC input channel. This architecture employs the
advantage of reduced crosstalk between channels.
The sample buffer amplifier is used to raise the effective input impedance of the A/D machine, so that
external components (higher bandwidth or higher impedance connected as specified) are less significant
to accuracy degradation.
During the sample phase, the analog input connects first via a sample buffer amplifier with the storage
node always for two ADC clock cycles (“Buffer” sample time). For the remaining sample time (“Final”
sample time) the storage node is directly connected to the analog input source. Please see also Figure 9-28
for illustration and the Appendix of the device reference manual for more details.
The input analog signals are unipolar and must be within the potential range of VSSA to VDDA.
During the hold process, the analog input is disconnected from the storage node.
Figure 9-28. Sampling and Conversion Timing Example (8-bit Resolution, 4 Cycle Sampling)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
"Buffer"
Sample Time
(2 cycles)
"Final"
Sample Time
(N - 2 cycles)
Total Sample Time
(N = SMP[4:0]) SAR Sequence
(Resolution Dependent Length: SRES[2:0])
Sample CAP hold phase
ADC_CLK
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
398 Freescale Semiconductor
Please note that there is always a pump phase of two ADC_CLK cycles before the sample phase begins,
hence glitches during the pump phase could impact the conversion accuracy for short sample times.
9.6.3 Digital Sub-Block
The digital sub-block contains a list-based programmers model and the control logic for the analog sub-
block circuits.
9.6.3.1 Analog-to-Digital (A/D) Machine
The A/D machine performs the analog-to-digital conversion. The resolution is program selectable to be
either 8- or 10- or 12 bits. The A/D machine uses a successive approximation architecture. It functions by
comparing the sampled and stored analog voltage with a series of binary coded discrete voltages.
By following a binary search algorithm, the A/D machine identifies the discrete voltag e that is nearest to
the sampled and stored voltage.
Only analog input signals within the potential range of VRL_0/1 to VRH_0/1/3 (availability of VRL_1
and VRH_2 see Table 9-2) (A/D reference potentials) will result in a non-railed digital output code.
9.6.3.2 Introduction of the Programmers Model
The ADC_LBA provides a programmers model that uses a system memory list-based architecture for
definition of the conversion command sequence and conversion result handling.
The Command Sequence List (CSL) and Result Value List (RVL) are implemented in double buffered
manner and the buffer mode is user selectable for each list (bits CSL_BMOD, RVL_BMOD). The 32-bit
wide conversion command is double buffered and the currently active command is visible in the ADC
register map at ADCCMD register space.
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 399
9.6.3.2.1 Introduction of The Command Sequence List (CSL) Format
A Command Sequence List (CSL) contains up to 64 conversion commands. A user selectable number of
successive conversion commands in the CSL can be grouped as a command sequence. This sequence of
conversion commands is successively executed by the ADC at the occurrence of a Trigger Event. The
commands of a sequence are successively executed until an “End Of Sequence” or “End Of List”
command type identifier in a command is detected (command type is coded via bits CMD_SEL[1:0]). The
number of successive conversion commands that belong to a command sequence and the number of
command sequences inside the CSL can be freely defined by the user and is limited by the 64 conversion
commands a CSL can contain. A CSL must contain at least one conversion command and one “end of list”
command type identifier. The minimum number of command sequences inside a CSL is zero and the
maximum number of command sequences is 63. A command sequence is defined with bits
CMD_SEL[1:0] in the register ADCCMD_M by defining the end of a conversion sequence. The Figure 9-
29 and Figure 9-30 provides examples of a CSL.
Figure 9-29. Example CSL with sequences and an “End Of List” command type identifier
Command_1
Command_2
Command_3
Command_4
Command_5
Command_6
Command_7
Command_8
Command_9
Command_10
Command_11
Command_12
Command_13
CSL_0/1
End Of Sequence
normal conversion
Command Coding Informat ion
normal conversion
normal conversion
normal conversion
normal conversion
normal conversion
0 0
0 0
0 0
0 0
0 0
0 1
0 0
0 0
0 1
0 0
0 0
1 1
0 0
CMD_SEL[1:0]done by bits
End Of Sequence
normal conversion
normal conversion
End Of List
normal conversion
normal conversion
}
Sequence_1
}
Sequence_2
}
Sequence_3
Waiting for trigger
to proceed
Waiting for trigger
to proceed
Waiting for trigger
to proceed
Wait for RSTA or
LDOK+RSTA
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
400 Freescale Semiconductor
Figure 9-30. Example CSL for continues conversion
Command_1
Command_2
Command_3
Command_4
Command_5
Command_6
Command_7
Command_8
Command_9
Command_10
Command_11
Command_12
Command_13
CSL_0
normal conversion
normal conversion
Command coding information
normal conversion
normal conversion
normal conversion
normal conversion
normal conversion
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
1 0
0 0
CMD_SEL[1:0]done by bits
normal conversion
normal conversion
normal conversion
End Of List, wrap to top, continue
normal conversion
normal conversion
continuous
conversion
Initial trigger
only
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 401
9.6.3.2.2 Introduction of the two Command Sequence Lists (CSLs)
The two Command Sequence Lists (CSLs) can be referred to via the Command Base Pointer Register plus
the Command and Result Offset Registers plus the Command Index Register (ADCCBP,
ADCCROFF_0/1, ADCCIDX).
The final address for conversion command loading is calculated by the sum of these registers (e.g.:
ADCCBP+ADCCROFF_0+ADCCIDX or ADCCBP+ADCCROFF_1+ADCCIDX).
Bit CSL_BMOD selects if the CSL is used in double buffer or single buf fer mode. In double buffer mode,
the CSL can be swapped by flow control bits LDOK and RSTA. For detailed information about when and
how the CSL is swapped, please refer to Section 9.6.3.2.5, “The four ADC conversion flow control bits -
description of Restart Event + CSL Swap, Section 9.9.7.1, “Initial S tart of a Command Sequence List and
Section 9.9.7.3, “Restart CSL execution with new/other CSL (alternative CSL becomes active CSL) —
CSL swapping
Which list is actively used for ADC command loading is indicated by bit CSL_SEL. The register to define
the CSL start addresses (ADCCBP) can be set to any even location of the system RAM or NVM area. It
is the users responsibility to make sure that the different ADC lists do not overlap or exceed the system
RAM or the NVM area, respectively. The error flag IA_EIF will be set for accesses to ranges outside
system RAM area and cause an error interrupt if enabled.
Figure 9-31. Command Sequence List Schema in Double Buffer Mode
Memory Map
0x00_0000 Register Space
RAM or NVM Space
RAM or NVM start address
RAM or NVM end address
CSL_0 (active)
ADCCBP+(ADCCROFF_0)
CSL_1 (alternative)
ADCCBP+(ADCCROFF_1)
ADCCBP+(ADCCROFF_0+
ADCCBP+(ADCCROFF_1+
Scenario with: CSL_SEL = 1’b0
Memory Map
0x00_0000 Register Space
RAM or NVM Space
RAM / NVM start address
RAM or NVM end address
CSL_1 (active)
ADCCBP+(ADCCROFF_0) CSL_0 (alternative)
ADCCBP+(ADCCROFF_1)
ADCCBP+(ADCCROFF_0+
ADCCMDP+(ADCCROFF_1+
Scenario with: CSL_SEL = 1’b1
ADCCIDX(max)) ADCCIDX(max))
ADCCIDX(max)) ADCCIDX(max))
Note:
Address register names in () are not absolute addresses instead they are a sample offset or sample index
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
402 Freescale Semiconductor
Figure 9-32. Command Sequence List Schema in Single Buffer Mode
While the ADC is enabled, one CSL is active (indicated by bit CSL_SEL) and the corresponding list
should not be modified anymore. At the same time the alternative CSL can be modified to prepare the ADC
for new conversion sequences in CSL double buffered mode. When the ADC is enabled, the command
address registers (ADCCBP, ADCCROFF_0/2, ADCCIDX) are read only and register ADCCIDX is under
control of the ADC.
Memory Map
0x00_0000 Register Space
RAM or NVM Space
RAM or NVM start address
RAM or NVM end address
CSL_0 (active)
ADCCBP+(ADCCROFF_0)
ADCCBP+(ADCCROFF_0+
CSL_SEL = 1’b0 (forced by CSL_BMOD)
ADCCIDX(max))
Note:
Address register names in () are not absolute addresses instead they are a sample offset or sample index
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 403
9.6.3.2.3 Introduction of the two Result Value Lists (RVLs)
The same list-based architecture as described above for the CSL has been implemented for the Result
Value List (RVL) with corresponding address registers (ADCRBP, ADCCROFF_0/1, ADCRIDX).
The final address for conversion result storage is calculated by the sum of these registers (e.g.:
ADCRBP+ADCCROFF_0+ADCRIDX or ADCRBP+ADCCROFF_1+ADCRIDX).
The RVL_BMOD bit selects if the RVL is used in double buffer or single buffer mode. In double buffer
mode the RVL is swapped:
Each time an “End Of List” command type got executed followed by the first conversion from top
of the next CSL and related (first) result is about to be stored
A CSL got aborted (bit SEQA=1’b1) and ADC enters idle state (becomes ready for new flow
control events)
Using the RVL in double buffer mode the RVL is not swapped after exit from Stop Mode or Wait Mode
with bit SWAI set. Hence the R VL used before entry of Stop or W ait Mode with bit SWAI set is overwritten
after exit from the MCU Operating Mode (see also Section 9.3.1.2, “MCU Operating Modes).
Which list is actively used for the ADC conversion result storage is indicated by bit RVL_SEL. The
register to define the RVL start addresses (ADCRBP) can be set to any even location of the system RAM
area. It is the users responsibility to make sure that the different ADC lists do not overlap or exceed the
system RAM area. The error flag IA_EIF will be set for acc esses to ranges outside system RAM area and
cause an error interrupt if enabled.
Figure 9-33. Result Value List Schema in Double Buffer Mode
Memory Map
0x00_0000 Register Space
RAM Space
RAM start address
RAM end address
RVL_0 (active)
ADCRBP+(ADCCROFF_0)
RVL_1 (alternative)
ADCRBP+(ADCCROFF_1)
ADCRBP+(ADCCROFF_0+
ADCRBP+(ADCCROFF_1+
Scenario with: RVL_SEL = 1’b0
Memory Map
0x00_0000 Register Space
RAM Space
RAM start address
RAM end address
RVL_1 (active)
ADCRBP+(ADCCROFF_0) RVL_0 (alternative)
ADCRBP+(ADCCROFF_1)
ADCRBP+(ADCCROFF_0+
ADCRBP+(ADCCROFF_1+
Scenario with: RVL_SEL = 1’b1
ADCRIDX(max)) ADCRIDX(max))
ADCRIDX(max)) ADCRIDX(max))
Note:
Address register names in () are not absolute addresses instead they are a sample offset or sample index
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
404 Freescale Semiconductor
Figure 9-34. Result Value List Schema in Single Buffer Mode
While ADC is enabled, one Result Value List is active (indicated by bit R VL_SEL). The conversion Result
Value List can be read anytime. When the ADC is enabled the conversion result address registers
(ADCRBP, ADCCROFF_0/1, ADCRIDX) are read only and register ADCRIDX is under control of the
ADC.
A conversion result is always stored as 16bit entity in unsigned data representation. Left and right
justification inside the entity is selected via the DJM control bit. Unused bits inside an entity are stored
zero.
Table 9-33. Conversion Result Justification Overview
Conversion Resolution
(SRES[1:0])
Left Justified Result
(DJM = 1’b0)
Right Justified Result
(DJM = 1’b1)
8 bit {Result[7:0],8’b00000000} {8’b00000000,Result[7:0]}
10 bit {Result[9:0],6’b000000} {6’b000000,Result[9:0]}
12 bit {Result[11:0],4’b0000} {4’b0000,Result[11:0]}
Memory Map
0x00_0000 Register Space
RAM Space
RAM start address
RAM end address
RVL_0 (active)
ADCRBP+(ADCCROFF_0)
ADCRBP+(ADCCROFF_0+
RVL_SEL = 1’b0 (forced by bit RVL_BMOD)
ADCRIDX(max))
Note:
Address register names in () are not absolute addresses instead they are a sample offset or sample index
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9.6.3.2.4 The two conversion flow control Mode Configurations
The ADC provides two modes (“Trigger Mode” and “Restart Mode”) which are different in the conversion
control flow. The “Restart Mode” provides precise timing control about the sample start point but is more
complex from the flow control perspective, while the “Trigger Mode” is more simple from flow control
point of view but is less controllable regarding conversion sample start.
Following are the key differences:
In “Trigger Mode” configuration, when conversion flow control bit RSTA gets set the bit TRIG gets set
automatically. Hence in “Trigger Mode” the applications should not set the bit TRIG and bit RSTA
simultaneously (via data bus or internal interface), because it is a flow control failure and the ADC will
cease operation.
In “Trigger Mode” configuration, after the execution of the initial Restart Event the current CSL can be
executed and controlled via T rigger Events only . Hence, if the “End Of List” command is reached a restart
of conversion flow from top of current CSL does not require to set bit RSTA because returning to the top
of current CSL is done automatically. Therefore the current CSL can be executed again after the “End Of
List” command type is executed by a Trigger Event only.
In “Restart Mode” configuration, the execution of a CSL is controlled via Trigger Events and Restart
Events. After execution of the “End Of List” command the conversion flow must be continued by a Restart
Event followed by a Trigger Event and the Trigger Event must not occur before the Restart Event has
finished.
For more details and examples regarding flow control and application use cases please see following
section and Section 9.9.7, “Conversion flow control application information.
9.6.3.2.5 The four ADC conversion flow control bits
There are four bits to control conversion flow (execution of a CSL and CSL exchange in double buffer
mode). Each bit is controllable via the data bus and internal interface depending on the setting of
ACC_CFG[1:0] bits (see also Figure 9-2). In the following the conversion control event to control the
conversion flow is given with the related internal interface signal and corresponding register bit name
together with information regarding:
Function of the conversion control event
How to request the event
When is the event finished
Mandatory requirements to executed the event
A summary of all event combinations is provided by Table 9-11.
Trigger Event
Internal Interface Signal: Trigger
Corresponding Bit Name: TRIG
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Function:
S tart the first conversion of a conversion sequence which is defined in the active Command
Sequence List
Requested by:
- Positive edge of internal interface signal Trigger
- Write Access via data bus to set control bit TRIG
When finished:
This bit is cleared by the ADC when the first conversion of the sequence is beginning to
sample
Mandatory Requirements:
- In all ADC conversion flow control modes bit TRIG is only set (Trigger Event executed)
if the Trigger Event occurs while no conversion or conversion sequence is ongoing (ADC
idle)
- In ADC conversion flow control mode “Restart Mode” with a Restart Event in progress it
is not allowed that a Trigger Event occurs before the background command load phase has
finished (Restart Event has been executed) else the error flag TRIG_EIF is set
- In ADC conversion flow control mode “Trigger Mode” a Restart Event causes bit TRIG
being set automatically. Bit TRIG is set when no conversion or conversion sequence is
ongoing (ADC idle) and the RVL done condition is reached by one of the following:
* A “End Of List” command type has been executed
* A Sequence Abort Event is in progress or has been executed
The ADC executes the Restart Event followed by the Trigger Event.
- In ADC conversion flow control mode “Trigger Mode” a Restart Event and a simultaneous
T rigger Event via internal interface or data bus causes the TRIG_EIF bit being set and ADC
cease operation.
Restart Event (with current active CSL)
Internal Interface Signal: Restart
Corresponding Bit Name: RSTA
Function:
- Go to top of active CSL (clear index register for CSL)
- Load one background command register and wait for Trigger (CSL offset register is not
switched independent of bit CSL_BMOD)
- Set error flag RSTA_EIF when a Restart Request occurs before one of the following
conditions was reached:
* The "End Of List" command type has been executed
* Depending on bit STR_SEQA if the "End Of List" command type is about to be executed
* The current CSL has been aborted or is about to be aborted due to a Sequence Abort
Request.
Requested by:
- Positive edge of internal interface signal Restart
- Write Access via data bus to set control bit RSTA
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When finished:
This bit is cleared when the first conversion command of the sequence from top of active
Sequence Command List is loaded
Mandatory Requirement:
- In all ADC conversion flow control modes a Restart Event causes bit RSTA to be set. Bit
SEQA is set simultaneously by ADC hardware if:
* ADC not idle (a conversion or conversion sequence is ongoing and current CSL not
finished) and no Sequence Abort Event in progress (bit SEQA not already set or set
simultaneously via internal interface or data bus)
* ADC idle but RVL done condition not reached
The RVL done condition is reached by one of the following:
* A “End Of List” command type has been executed
* A Sequence Abort Event is in progress or has been executed (bit SEQA already set or set
simultaneously via internal interface or data bus)
The ADC executes the Sequence Abort Event fo llowed by the Restart Event for the
conditions described before or only a Restart Event.
- In ADC conversion flow control mode “Trigger Mode” a Restart Event causes bit TRIG
being set automatically. Bit TRIG is set when no conversion or conversion sequence is
ongoing (ADC idle) and the RVL done condition is reached by one of the following:
* A “End Of List” command type has been executed
* A Sequence Abort Event is in progress or has been executed
The ADC executes the Restart Event followed by the Trigger Event.
- In ADC conversion flow control mode “Trigger Mode” a Restart Event and a simultaneous
T rigger Event via internal interface or data bus causes the TRIG_EIF bit being set and ADC
cease operation.
Restart Event + CSL Exchange (Swap)
Internal Interface Signals: Restart + LoadOK
Corresponding Bit Names: RSTA + LDOK
Function:
Go to top of active CSL (clear index register for CSL) and switch to other of fset register for
address calculation if configured for double buffer mode (exchange the CSL list)
Requested by:
- Internal interface with the assertion of Interface Signal Restart the interface Signal
LoadOK is evaluated and bit LDOK is set accordingly (bit LDOK set if Interface Signal
LoadOK asserted when Interface Signal Restart asserts).
- Write Access via data bus to set control bit RSTA simultaneously with bit LDOK.
When finished:
Bit LDOK can only be cleared if it was set as described before and both bits (LDOK, RSTA)
are cleared when the first conversion command from top of active Sequence Command List
is loaded
Mandatory Requirement:
No ongoing conversion or conversion sequence
Details if using the internal interface:
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If signal Restart is asserted before signal LoadOK is set the conversion starts from top of
currently active CSL at the next Trigger Event (no exchange of CSL list).
If signal Restart is asserted after or simultaneously with signal LoadOK the conversion
starts from top of the other CSL at the next Trigger Event (CSL is switched) if CSL is
configured for double buffer mode.
Sequence Abort Event
Internal Interface Signal: Seq_Abort
Corresponding Bit Name: SEQA
Function:
Abort any possible ongoing conversion at next conversion boundary and abort current
conversion sequence and active CSL
Requested by:
- Positive edge of internal interface signal Seq_Abort
- Write Access via data bus to set control bit SEQA
When finished:
This bit gets cleared when an ongoing conversion is finished and the result is stored and/or
an ongoing conversion sequence is aborted and current active CSL is aborted (ADC idle,
RVL done)
Mandatory Requirement:
- In all ADC conversion flow control modes bit SEQA can only be set if:
* ADC not idle (a conversion or conversion sequence is ongoing)
* ADC idle but RVL done condition not reached
The RVL done condition is not reached if:
* An “End Of List” command type has not been executed
* A Sequence Abort Event has not been executed (bit SEQA not already set)
- In all ADC conversion flow control modes a Sequence Abort Event can be issued at any
time
- In ADC conversion flow control mode “Restart Mode” after a conversion sequence abort
request has been executed it is mandatory to set bit RSTA. If a Trigger Event occurs before
a Restart Event is executed (bit RSTA set and cleared by hardware), bit TRIG is set, error
flag TRIG_EIF is set, and the ADC can only be continued by a Soft-Reset. After the Restart
Event the ADC accepts new Trigger Events (bit TRIG set) and begins conversion from top
of the currently active CSL.
- In ADC conversion flow control mode “Restart Mode” after a Sequence Abort Event has
been executed, a Restart Event causes only the RSTA bit being set. The ADC executes a
Restart Event only.
In both conversion flow control modes (“Restart Mode” and “Trigger Mode”) when
conversion flow control bit RSTA gets set automatically bit SEQA gets set when the ADC
has not reached one of the following scenarios:
* An “End Of List” command type has been executed or is about to be executed
* A Sequence Abort request is about to be executed or has been executed.
In case bit SEQA is set automatically the Restart error flag RSTA_EIF is set to indicate an
unexpected Restart Request.
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9.6.3.2.6 Conversion flow control in case of conversion sequence control bit overrun
scenarios
Restart Request Overrun:
If a legal Restart Request is detected and no Restart Event is in progress, the RSTA bit is set due to the
request. The set RSTA bit indicates that a Restart Request was detected and the Restart Event is in process.
In case further Restart Requests occur while the RSTA bit is set, this is defined a overrun situation. This
scenario is likely to occur when bit STR_SEQA is set or when a Restart Event causes a Sequence Abort
Event. The request overrun is captured in a background register that always stores the last detected overrun
request. Hence if the overrun situation occurs more than once while a Restart Event is in progress, only
the latest overrun request is pending. When the RSTA bit is cleared, the latest overrun request is processed
and RSTA is set again one cycle later.
LoadOK Overrun:
Simultaneously at any Restart Request overrun situation the LoadOK input is evaluated and the status is
captured in a background register which is alternated anytime a Restart Request Overrun occurs while
Load OK Request is asserted. The Load OK background register is cleared as soon as the pending Restart
Request gets processed.
Trigger Overrun:
If a T rigger occurs whilst bit TRIG is alread y set, this is defined as a T rigger overrun situation and causes
the ADC to cease conversion at the next conversion boundary and to set bit TRIG_EIF. A overrun is also
detected if the Trigger Event occurs automatically generated by hardware in “Trigger Mode” due to a
Restart Event and simultaneously a Trigger Event is generated via data bus or internal interface. In this
case the ADC ceases operation before conversion begins to sample. In “Trigger Mode” a Restart Request
Overrun does not cause a Trigger Overrun (bit TRIG_EIF not set).
Sequence Abort Request Overrun:
If a Sequence Abort Request occurs whilst bit SEQA is already set, this is defined as a Sequence Abort
Request Overrun situation and the overrun request is ignored.
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9.6.3.3 ADC List Usage and Conversion/Conversion Sequence Flow
Description
It is the user s responsibility to make sure that the different lists do not overlap or exceed the system RAM
area respectively the CSL does not exceed the NVM area if located in the NVM. The error flag IA_EIF
will be set for accesses done outside the system RAM area and will cause an error interrupt if enabled for
lists that are located in the system RAM.
Generic flow for ADC register load at conversion sequence start/restart:
It is mandatory that the ADC is idle (no ongoing conversion or conversion sequence).
It is mandatory to have at least one CSL with valid entries. See also Section 9.9.7.2, “Restart CSL
execution with currently active CSL or Section 9.9.7.3, “Restart CSL execution with new/other
CSL (alternative CSL becomes active CSL) — CSL swapping for more details on possible
scenarios.
A Restart Event occurs, which causes the index registers to be cleared (register ADCCIDX and
ADCRIDX are cleared) and to point to the top of the corresponding lists (top of active RVL and
CSL).
Load conversion command to background conversion command register 1.
The control bit(s) RSTA (and LDOK if set) are cleared.
Wait for Trigger Event to start conversion.
Generic flow for ADC register load during conversion:
The index registers ADCCIDX is incremented.
The inactive background command register is loaded with a new conversion command.
Generic flow for ADC result storage at end of conversion:
Index register ADCRIDX is incremented and the conversion result is stored in system RAM. As
soon as the result is successfully stored, any conversion interrupt flags are set accordingly.
At the conversion boundary the other background command register becomes active and visible in
the ADC register map.
If the last executed conversion command was of type “End Of Sequence”, the ADC waits for the
Trigger Event.
If the last executed conversion command was of type “End Of List” and the ADC is configured in
“Restart Mode”, the ADC sets all related flags a nd stays idle awaiting a Restart Event to continue.
If the last executed conversion command was of type “End Of List” and the ADC is configured in
“T rigger Mode”, the ADC sets all related flags and automatically returns to top of current CSL and
is awaiting a Trigger Event to continue.
If the last executed conversion command was of type “Normal Conversion” the ADC continues
command execution in the order of the current CSL (continues conversion).
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9.7 Resets
At reset the ADC12B_LBA is disabled and in a power down state. The reset state of each individual bit is
listed within Section 9.5.2, “Register Descriptions” which details the registers and their bit-fields.
9.8 Interrupts
The ADC supports three types of interrupts:
Conversion Interrupt
Sequence Abort Interrupt
Error and Conversion Flow Control Issue Interrupt
Each of the interrupt types is associated with individual interrupt enable bits and interrupt flags.
9.8.1 ADC Conversion Interrupt
The ADC provides one conversion interrupt associated to 16 interrupt enable bits with dedicated interrupt
flags. The 16 interrupt flags consist of:
15 conversion interrupt flags which can be associated to any conversion completion.
One additional interrupt flag which is fixed to the “End Of List” conversion command type within
the active CSL.
The association of the conversion number with the interrupt flag number is done in the conversion
command.
9.8.2 ADC Sequence Abort Done Interrupt
The ADC provides one sequence abort done interrupt associated with the sequence abort request for
conversion flow control. Hence, there is only one dedicated interrupt flag and interrupt enable bit for
conversion sequence abort and it occurs when the sequence abort is done.
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9.8.3 ADC Error and Conversion Flow Control Issue Interrupt
The ADC provides one error interrupt for four error classes related to conversion interrupt overflow,
command validness, DMA access status and Conversion Flow Control issues, and CSL failure. The
following error interrupt flags belong to the group of severe issues which cause an error interrupt if enabled
and cease ADC operation:
•IA_EIF
•CMD_EIF
•EOL_EIF
•TRIG_EIF
In order to make the ADC operational again, an ADC Soft-Reset must be issued which clears the above
listed error interrupt flags.
NOTE
It is important to note that if flag DBECC_ERR is set, the ADC ceases
operation as well, but does not cause an ADC error interrupt. Instead, a
machine exception is issued. In order to make the ADC operational again an
ADC Soft-Reset must be issued.
Remaining error interrupt flags cause an error interrupt if enabled, but ADC continues operation. The
related interrupt flags are:
•RSTAR_EIF
LDOK_EIF
CONIF_OIF
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9.9 Use Cases and Application Information
9.9.1 List Usage — CSL single buffer mode and RVL single buffer mode
In this use case both list types are configured for single buffer mode (CSL_BMOD=1’b0 and
R VL_BMOD=1’b0, CSL_SEL and RVL_SEL are forced to 1’b0). The index register for the CSL and R VL
are cleared to start from the top of the list with next conversion command and result storage in the
following cases:
The conversion flow reaches the command containing the “End-of-List” command type identifier
A Restart Request occurs at a sequence boundary
After an aborted conversion or conversion sequence
Figure 9-35. CSL Single Buffer Mode — RVL Single Buffer Mode Diagram
9.9.2 List Usage — CSL single buffer mode and RVL double buffer mode
In this use case the CSL is configured for single buffer mode (CSL_BMOD=1’b0) and the RVL is
configured for double buffer mode (RVL_BMOD=1’b1). In this buf fer configuration only the result list
RVL is switched when the first conversion result of a CSL is stored after a CSL was successfully finished
or a CSL got aborted.
Figure 9-36. CSL Single Buffer Mode — RVL Single Buffer Mode Diagram
The last entirely filled RVL (an RVL where the corresponding CSL has been executed including the “End
Of List “ command type) is shown by register ADCEOLRI.
The CSL is used in single buffer mode and bit CSL_SEL is forced to 1’b0.
CSL_0
CSL_1
(unused)
RVL_0
RVL_1
(unused)
CSL_0
CSL_1
(unused)
RVL_0
RVL_1
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9.9.3 List Usage CSL double buffer mode and RVL double buffer mode
In this use case both list types are configured for double buffer mode (CSL_BMOD=1’b1 and
RVL_BMOD=1’b1) and whenever a Command Sequence List (CSL) is finished or aborted the command
Sequence List is swapped by the simultaneous assertion of bits LDOK and RSTA.
Figure 9-37. CSL Double Buffer Mode — RVL Double Buffer Mode Diagram
This use case can be used if the channel order or CSL length varies very frequently in an application.
9.9.4 List Usage — CSL double buffer mode and RVL single buffer mode
In this use case the CSL is configured for double buffer mode (CSL_BMOD=1’b1) and the RVL is
configured for single buffer mode (RVL_BMOD=1’b0).
The two command lists can be different sizes and the allocated result list memory area in the RAM must
be able to hold as many entries as the larger of the two command lists. Each time when the end of a
Command Sequence List is reached, if bits LDOK and RSTA are set, the commands list is swapped.
Figure 9-38. CSL Double Buffer Mode — RVL Single Buffer Mode Diagram
CSL_0
CSL_1
RVL_0
RVL_1
CSL_0
CSL_1
RVL_0
RVL_1
(unused)
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9.9.5 List Usage CSL double buffer mode and RVL double buffer mode
In this use case both list types are configured for double buffer mode (CSL_BMOD=1’b1) and
RVL_BMOD=1’b1).
This setup is the same as Section 9.9.3, “List Usage — CSL double buffer mode and RVL double buffer
mode but at the end of a CSL the CSL is not always swapped (bit LDOK not always set with bit RSTA).
The Result Value List is swapped whenever a CSL is finished or a CSL got aborted.
Figure 9-39. CSL Double Buffer Mode — RVL Double Buffer Mode Diagram
9.9.6 RVL swapping in RVL double buffer mode and related registers
ADCIMDRI and ADCEOLRI
When using the RVL in double buffer mode, the registers ADCIMDRI and ADCEOLRI can be used by
the application software to identify which RVL holds relevant and latest data and which CSL is related to
this data. These registers are updated at the setting of one of the CON_IF[15:1] or the EOL_IF interrupt
flags. As described in the register description Section 9.5.2.13, “ADC Intermediate Result Information
Register (ADCIMDRI) and Section 9.5.2.14, “ADC End Of List Result Information Register
(ADCEOLRI), the register ADCIMDRI, for instance, is always updated at the occurrence of a
CON_IF[15:1] interrupt flag amongst other cases. Also each time the last conversion command of a CSL
is finished and the corresponding result is stored, the related EOL_IF flag is set and register ADCEOLRI
is updated. Hence application software can pick up conversion results, or groups of results, or an entire
result list driven fully by interrupts. A use case example diagram is shown in Figure 9-40.
CSL_0
CSL_1
RVL_0
RVL_1
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Figure 9-40. RVL Swapping — Use Case Diagram
RVL Buffer RVL_0
CSL_0
Initial
Restart
Event
EOL
CSL_1
EOL
CSL_0
Stop Mode request
while conversion
RVL_1
Stop Mode
entry
Wake-up
Event with
AUT_RSTA= 1’b1
RVL_0
CSL_0
t
CSL Buffer
RVL swap
due to EOL
no RVL
swap
RVL values before Stop Mode
entry are overwritten
RVL_EOL 1’b0 1’b1
CSL_EOL 1’b0 1’b1
bits are valid
bits not valid
until first EOL
EOL_IF 1’b1
set by
hardware cleared by
software
1’b1
before next EOL should be cleared by sof tware
before Stop Mode entry
return to execute
from top of CSL
followed by
next CSL to store
first result of
ongoing and before EOL
RVL_IMD 1’b0 1’b1
CSL_IMD 1’b0 1’b1
CON_IF[15:1] 0x0001
INT_1
0x0000 0x0000
Flag should be cleared by
software before it is set again
bits are valid
bits not valid
until first INT
EOL:
INT_x:
INT_2
0x0010
”End Of List” command type processed
One of the CON_IF interrupt flags occurs
INT_1
0x0001
1’b0
1’b0
RIDX_IMD[5:0] 0x050x00 0x0A 0x08 0x05
0x0B
tdelay
Delay can vary depending on the DMA performance, and ADC confi guratio n (conversion
flow using the Trigger to proceed through the CSL)
tdelay:
Comments:
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9.9.7 Conversion flow control application information
The ADC12B_LBA provides various conversion control scenarios to the user accomplished by the
following features.
The ADC conversion flow control can be realized via the data bus only, the internal interface only, or by
both access methods. The method used is software configurable via bits ACC_CFG[1:0].
The conversion flow is controlled via the four conversion flow control bits: SEQA, TRIG, RSTA, and
LDOK.
Two different conversion flow control modes can be configured: Trigger Mode or Restart Mode
Single or double buffer configuration of CSL and RVL.
9.9.7.1 Initial Start of a Command Sequence List
At the initial start of a Command Sequence List after device reset all entries for at least one of the two CSL
must have been completed and data must be valid. Depending on if the CSL_0 or the CSL_1 should be
executed at the initial start of a Command Sequence List the following conversion control sequence must
be applied:
If CSL_0 should be executed at the initial conversion start after device reset:
A Restart Event and a T rigger Event must occur (depending to the selected conversion flow control mode
the events must occur one after the other or simultaneously) which causes the ADC to start conversion with
commands loaded from CSL_0.
If CSL_1 should be executed at the initial conversion start after device reset:
Bit LDOK must be set simultaneously with the Restart Event followed by a Trigger Event (depending on
the selected conversion flow control mode the Trigger events must occur simultaneously or after the
Restart Event is finished). As soon as the Trigger Event gets executed the ADC starts conversion with
commands loaded from CSL_1.
As soon as a new valid Restart Event occurs the flow for ADC register load at conversion sequence start
as described in Section 9.6.3.3, “ADC List Usage and Conversion/Conversion Sequence Flow Description
applies.
9.9.7.2 Restart CSL execution with currently active CSL
To restart a Command Sequence List execution it is mandatory that the ADC is idle (no conversion or
conversion sequence is ongoing).
If necessary , a possible ongoing conversion sequence can be aborted by the Sequence Abort Event (setting
bit SEQA). As soon as bit SEQA is cleared by the ADC, the current conversion sequence has been aborted
and the ADC is idle (no conversion sequence or conversion ongoing).
After a conversion sequence abort is executed it is mandatory to request a Restart Event (bit RSTA set).
After the Restart Event is finished (bit RSTA is cleared), the ADC acce pts a new T rigger Event (bit TRIG
can be set) and begins conversion from the top of the currently active CSL. In conversion flow control
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mode “T rigger Mode” only a Restart Event is necessary if ADC is idle to restart Conversion Sequence List
execution (the Trigger Event occurs automatically).
It is possible to set bit RSTA and SEQA simultaneously, causing a Sequence Abort Event followed by a
Restart Event. In this case the error flags behave differently depending on the selected conversion flow
control mode:
Setting both flow control bits simultaneously in conversion flow control mode “Restart Mode”
prevents the error flags RSTA_EIF and LDOK_EIF from occurring.
Setting both flow control bits simultaneously in conversion flow control mode “Trigger Mode”
prevents the error flag RSTA_EIF from occurring.
If only a Restart Event occurs while ADC is not idle and bit SEQA is not set already (Sequence Abort
Event in progress) a Sequence Abort Event is issued automatically and bit RSTAR_EIF is set.
Please see also the detailed conversion flow control bit mandatory requirements and execution information
for bit RSTA and SEQA described in Section 9.6.3.2.5, “The four ADC conversion flow control bits.
9.9.7.3 Restart CSL execution with new/other CSL (alternative CSL becomes
active CSL) — CSL swapping
After all alternative conversion command list entries are finished the bit LDOK can be set simultaneously
with the next Restart Event to swap command buffers.
To start conversion command list execution it is mandatory that the ADC is idle (no conversion or
conversion sequence is ongoing).
If necessary , a possible ongoing conversion sequence can be aborted by the Sequence Abort Event (setting
bit SEQA). As soon as bit SEQA is cleared by the ADC, the current conversion sequence has been aborted
and the ADC is idle (no conversion sequence or conversion ongoing).
After a conversion sequence abort is executed it is mandatory to request a Restart Event (bit RSTA set)
and simultaneously set bit LDOK to swap the CSL buffer. After the Restart Event is finished (bit RSTA
and LDOK are cleared), the ADC accepts a new Trigger Event (bit TRIG can be set) and begins conversion
from the top of the newly selected CSL buffer. In conversion flow control mode “Trigger Mode” only a
Restart Event (simultaneously with bit LDOK being set) is necessary to restart conversion command list
execution with the newly selected CSL buffer (the Trigger Event occurs automatically).
It is possible to set bits RSTA, LDOK and SEQA simultaneously, causing a Sequence Abort Event
followed by a Restart Event. In this case the error flags behave differently depending on the selected
conversion flow control mode:
Setting these three flow control bits simultaneously in “Restart Mode” prevents the error flags
RSTA_EIF and LDOK_EIF from occurring.
Setting these three flow control bits simultaneously in “Trigger Mode” prevents the error flag
RSTA_EIF from occurring.
If only a Restart Event occurs while ADC is not idle and bit SEQA is not set already (Sequence Abort
Event in progress) a Sequence Abort Event is issued automatically and bit RSTAR_EIF is set.
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Please see also the detailed conversion flow control bit mandatory requirements and execution information
for bit RSTA and SEQA described in Section 9.6.3.2.5, “The four ADC conversion flow control bits.
9.9.8 Continuous Conversion
Applications that only need to continuously convert a list of channels, without the need for timing control
or the ability to perform different sequences of conversions (grouped number of different channels to
convert) can make use of the following simple setup:
“Trigger Mode” configuration
Single buffer CSL
Depending on data transfer rate either use single or double buffer RVL configuration
Define a list of conversion commands which only contains the “End Of List” command with
automatic wrap to top of CSL
After finishing the configuration and enabling the ADC an initial Restart Event is sufficient to launch the
continuous conversion until next device reset or low power mode.
In case a Low Power Mode is used:
If bit AUT_RSTA is set before Low Power Mode is entered the conversion continues automatically as
soon as a low power mode (Stop Mode or Wait Mode with bit SWAI set) is exited.
Figure 9-41. Conversion Flow Control Diagram — Continuous Conversion (with Stop Mode)
CSL_0 Active
AN3 AN1 AN4 IN5
Initial
Restart
Event
EOL
AN3 AN1 AN4 IN5
EOL
AN3 AN1
Stop Mode request,
Automatic Sequence Abort
Event
Idle
Stop Mode
entry
Wake-up
Event with
Idle
AUT_RSTA
Active
AN3 AN1 AN4
Abort
t
Chapter 9 Analog-to-Digital Converter (ADC12B_LBA)
MC9S12ZVM Family Reference Manual Rev. 2.2
420 Freescale Semiconductor
9.9.9 Triggered Conversion — Single CSL
Applications that require the conversion of one or more groups of different channels in a periodic and
timed manner can make use of a configuration in “Trigger Mode” with a single CSL containing a list of
sequences. This means the CSL consists of several sequences each separated by an “End of Sequence”
command. The last command of the CSL uses the “End Of List” command with wrap to top of CSL and
waiting for a T rigger (CMD_SEL[1:0] =2’b1 1). Hence after the initial Restart Event each sequence can be
launched via a Trigger Event and repetition of the CSL can be launched via a Trigger after execution of
the “End Of List” command.
Figure 9-42. Conversion Flow Control Diagram — Triggered Conversion (CSL Repetition)
Figure 9-43. Conversion Flow Control Diagram — Triggered Conversion (with Stop Mode)
In case a Low Power Mode is used:
If bit AUT_RSTA is set before Low Power Mode is entered, the conversion continues automatically as
soon as a low power mode (Stop Mode or Wait Mode with bit SWAI set) is exited.
CSL_0 Active
AN3 AN1 AN4 IN5
Initial
Restart
Event
EOS
AN2 AN0 AN4 IN3
EOS
AN3 AN1 AN4AN6 AN1 IN1
EOL
Trigger Trigger Trigger
Sequence_0 Sequence_1 Sequence_0
Sequence_2
Repetition of CSL_0
t
CSL_0 Active
AN3 AN1 AN4 IN5
initial
Restart
Event
EOS
AN21AN0 AN4 IN3
EOS
AN6 AN1
Stop Mode request,
Automatic Sequence Abort
Event
Idle
Stop Mode
entry
Wake-up
Event with
Idle
AUT_RSTA
Active
AN3 AN1 AN4
Abort
Sequence_0 Sequence_1
Trigger Trigger
EOS
Sequence_0
Sequence_2 AN5 AN2 AN0
Sequence_1
Trigger
Begin from top of current CSL
t
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MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 421
9.9.10 Fully Timing Controlled Conversion
As described previously, in “Trigger Mode” a Restart Event automatically causes a trigger. To have full
and precise timing control of the beginning of any conversion/sequence the “Restart Mode” is available.
In “Restart Mode” a Restart Event does not cause a Trigger automatically; instead, the Trigger must be
issued separately and with correct timing, which means the T rigger is not allowed before the Restart Event
(conversion command loading) is finished (bit RSTA=1’b0 again). The time required from Trigger until
sampling phase starts is given (refer to Section 9.5.2.6, “ADC Conversion Flow Control Register
(ADCFLWCTL), Timing considerations) and hence timing is fully controllable by the application.
Additionally, if a Trigger occurs before a Restart Event is finished, this causes the TRIG_EIF flag being
set. This allows detection of false flow control sequences.
Figure 9-44. Conversion Flow Control Diagram — Fully Timing Controlled Conversion (with Stop Mode)
Unlike the Stop Mode entry shown in Figure 9-43 and Figure 9-44 it is recommended to issue the Stop
Mode at sequence boundaries (when ADC is idle and no conversion/conversion sequence is ongoing).
Any of the Conversion flow control application use cases described above (Continuous, Triggered, or
Fully T iming Controlled Conversion) can be used with CSL single buffer mode or with CSL double buffer
mode. If using CSL double buffer mode, CSL swapping is performed by issuing a Restart Event with bit
LDOK set.
CSL_0 Active
AN3 AN1 AN4 IN5
any
Restart
Event
EOS
AN21AN0 AN4 IN3
EOS
AN6 AN1
Stop Mode request,
Automatic Sequence Abort
Event
Idle
Stop Mode
entry
Wake-up
Event with
Idle
AUT_RSTA
Active
AN3 AN1 AN4
Abort
Sequence_0 Sequence_1
Trigger Trigger
EOS
Sequence_0
Sequence_2 AN5 AN2 AN0
Sequence_1
Trigger
Begin from top of current CSL
Trigger
conversion command
load phase
t
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422 Freescale Semiconductor
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 423
Chapter 10
Supply Voltage Sensor - (BATSV3)
10.1 Introduction
The BATS module provides the functionality to measure the voltage of the chip supply pin VSUP.
10.1.1 Features
The VSUP pin can be routed via an internal divider to the internal Analog to Digital Converter.
Independent of the routing to the Analog to Digital Converter, it is possible to route this voltage to a
comparator to generate a low or a high voltage interrupt to alert the MCU.
10.1.2 Modes of Operation
The BATS module behaves as follows in the system power modes:
1. Run mode
The activation of the VSUP Level Sense Enable (BSUSE=1) or ADC connection Enable
(BSUAE=1) closes the path from VSUP pin through the resistor chain to ground and enables the
associated features if selected.
2. Stop mode
During stop mode operation the path from the VSUP pin through the resistor chain to ground is
opened and the low and high voltage sense features are disabled.
The content of the configuration register is unchanged.
Table 10-1. Revision History Table
Rev. No.
(Item No.)
Data Sections
Affected Substantial Change(s)
V01.00 15 Dec 2010 all Initial Version
V02.00 16 Mar 2011 10.3.2.1
10.4.2.1
- added BVLS[1] to support four voltage level
- moved BVHS to register bit 6
V03.00 26 Apr 2011 all - removed Vsense
V03.10 04 Oct 2011 10.4.2.1 and
10.4.2.2
- removed BSESE
Chapter 10 Supply Voltage Sensor - (BATSV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
424 Freescale Semiconductor
10.1.3 Block Diagram
Figure 10-1 shows a block diagram of the BATS module. See device guide for connectivity to ADC
channel.
Figure 10-1. BATS Block Diagram
10.2 External Signal Description
This section lists the name and description of all external ports.
10.2.1 VSUP — Voltage Supply Pin
This pin is the chip supply. It can be internally connected for voltage measurement. The voltage present at
this input is scaled down by an internal voltage divider, and can be routed to the internal ADC or to a
comparator.
VSUP
to ADC
...
BVLC BVHC
BSUAE
BSUSE
BVHS
BVLS[1:0] Comparator
1 automatically closed if BSUSE and/or BSUAE
is active, open during Stop mode
1
Chapter 10 Supply Voltage Sensor - (BATSV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 425
10.3 Memory Map and Register Definition
This section provides the detailed information of all registers for the BATS module.
10.3.1 Register Summary
Figure 10-2 shows the summary of all implemented registers inside the BATS module.
NOTE
Register Address = Module Base Address + Address Offset, where the
Module Base Address is defined at the MCU level and the Address Offset
is defined at the module level.
10.3.2 Register Descriptions
This section consists of register descriptions in address order . Each description includes a standard register
diagram with an associated figure number. Details of register bit and field function follow the register
diagrams, in bit order. Unused bits read back zero.
Address Offset
Register Name Bit 7654321Bit 0
0x0000
BATE
R0
BVHS BVLS[1:0] BSUAE BSUSE
00
W
0x0001
BATSR
R000000BVHCBVLC
W
0x0002
BATIE
R000000
BVHIE BVLIE
W
0x0003
BATIF
R000000
BVHIF BVLIF
W
0x0004 - 0x0005
Reserved
R00000000
W
0x0006 - 0x0007
Reserved
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
= Unimplemented
Figure 10-2. BATS Register Summary
Chapter 10 Supply Voltage Sensor - (BATSV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
426 Freescale Semiconductor
10.3.2.1 BATS Module Enable Register (BATE)
NOTE
When opening the resistors path to ground by changing BSUSE or BSUAE
then for a time TEN_UNC + two bus cycles the measured value is invalid.
This is to let internal nodes be charged to correct value. BVHIE, BVLIE
might be cleared for this time period to avoid false interrupts.
Module Base + 0x0000 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0
BVHS BVLS[1:0] BSUAE BSUSE
00
W
Reset00000000
= Unimplemented
Figure 10-3. BATS Module Enable Register (BATE)
Table 10-2. BATE Field Description
Field Description
6
BVHS
BATS Voltage High Select — This bit selects the trigger level for the Voltage Level High Condition (BVHC).
0 Voltage level VHBI1 is selected
1 Voltage level VHBI2 is selected
5:4
BVLS[1:0]
BATS Voltage Low Select — This bit selects the trigger level for the Voltage Level Low Condition (BVLC).
00 Voltage level VLBI1 is selected
01 Voltage level VLBI2 is selected
10 Voltage level VLBI3 is selected
11 Voltage level VLBI4 is selected
3
BSUAE
BATS VSUP ADC Connection Enable — This bit connects the VSUP pin through the resistor chain to ground
and connects the ADC channel to the divided down voltage.
0 ADC Channel is disconnected
1 ADC Channel is connected
2
BSUSE
BATS VSUP Level Sense Enable — This bit connects the VSUP pin through the resistor chain to ground and
enables the Voltage Level Sense features measuring BVLC and BVHC.
0 Level Sense features disabled
1 Level Sense features enabled
Chapter 10 Supply Voltage Sensor - (BATSV3)
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Freescale Semiconductor 427
10.3.2.2 BATS Module Status Register (BATSR)
Figure 10-5. BATS Voltage Sensing
Module Base + 0x0001 Access: User read only(1)
1. Read: Anytime
Write: Never
76543210
R 0 0 0 0 0 0 BVHC BVLC
W
Reset00000000
= Unimplemented
Figure 10-4. BATS Module Status Register (BATSR)
Table 10-3. BATSR - Register Field Descriptions
Field Description
1
BVHC
BATS Voltage Sense High Condition Bit — This status bit indicates that a high voltage at VSUP, depending
on selection, is present.
0 Vmeasured VHBI_A (rising edge) or Vmeasured VHBI_D (falling edge)
1 Vmeasured VHBI_A (rising edge) or Vmeasured VHBI_D (falling edge)
0
BVLC
BATS Voltage Sense Low Condition Bit This status bit indicates that a low voltage at VSUP, depending on
selection, is present.
0 Vmeasured VLBI_A (falling edge) or Vmeasured VLBI_D (rising edge)
1 Vmeasured VLBI_A (falling edge) or Vmeasured VLBI_D (rising edge)
t
V
VLBI_A
VLBI_D
VHBI_A
VHBI_D
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428 Freescale Semiconductor
10.3.2.3 BATS Interrupt Enable Register (BATIE)
10.3.2.4 BATS Interrupt Flag Register (BATIF)
Module Base + 0x0002 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R000000
BVHIE BVLIE
W
Reset00000000
= Unimplemented
Figure 10-6. BATS Interrupt Enable Register (BATIE)
Table 10-4. BATIE Register Field Descriptions
Field Description
1
BVHIE
BATS Interrupt Enable High — Enables High Voltage Interrupt .
0 No interrupt will be requested whenever BVHIF flag is set .
1 Interrupt will be requested whenever BVHIF flag is set
0
BVLIE
BATS Interrupt Enable Low — Enables Low Voltage Interrupt .
0 No interrupt will be requested whenever BVLIF flag is set .
1 Interrupt will be requested whenever BVLIF flag is set .
Module Base + 0x0003 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear
76543210
R000000
BVHIF BVLIF
W
Reset00000000
= Unimplemented
Figure 10-7. BATS Interrupt Flag Register (BATIF)
Chapter 10 Supply Voltage Sensor - (BATSV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 429
10.3.2.5 Reserved Register
NOTE
These reserved registers are designed for factory test purposes only and are
not intended for general user access. Writing to these registers when in
special mode can alter the module’s functionality.
10.4 Functional Description
10.4.1 General
The BATS module allows measuring the voltage on the VSUP pin. The voltage at the VSUP pin can be
routed via an internal voltage divider to an internal Analog to Digital Converter Channel. Also the BATS
module can be configured to generate a low and high voltage interrupt based on VSUP. The trigger level
of the high and low interrupt are selectable.
10.4.2 Interrupts
This section describes the interrupt generated by the BATS module. The interrupt is only available in CPU
run mode. Entering and exiting CPU stop mode has no effect on the interrupt flags.
To make sure the interrupt generation works properly the bus clock frequency must be higher than the
Voltage Warning Low Pass Filter frequency (fVWLP_filter).
Table 10-5. BATIF Register Field Descriptions
Field Description
1
BVHIF
BATS Interrupt Flag High Detect — The flag is set to 1 when BVHC status bit changes.
0 No change of the BVHC status bit since the last clearing of the flag.
1 BVHC status bit has changed since the last clearing of the flag.
0
BVLIF
BATS Interrupt Flag Low Detect — The flag is set to 1 when BVLC status bit changes.
0 No change of the BVLC status bit since the last clearing of the flag.
1 BVLC status bit has changed since the last clearing of the flag.
Module Base + 0x0006
Module Base + 0x0007
Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode
76543210
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
Figure 10-8. Reserved Register
Chapter 10 Supply Voltage Sensor - (BATSV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
430 Freescale Semiconductor
The comparator outputs BVLC and BVHC are forced to zero if the comparator is disabled (configuration
bit BSUSE is cleared). If the software disables the comparator during a high or low Voltage condition
(BVHC or BVLC active), then an additional interrupt is generated. To avoid this behavior the software
must disable the interrupt generation before disabling the comparator.
The BATS interrupt vector is named in Table 10-6. Vector addresses and interrupt priorities are defined at
MCU level.
The module internal interrupt sources are combined into one module interrupt signal.
10.4.2.1 BATS Voltage Low Condition Interrupt (BVLI)
To use the Voltage Low Interrupt the Level Sensing must be enabled (BSUSE =1).
If measured when
a) VLBI1 selected with BVLS[1:0] = 0x0
Vmeasure VLBI1_A (falling edge) or Vmeasure VLBI1_D (rising edge)
or when
b) VLBI2 selected with BVLS[1:0] = 0x1 at pin VSUP
Vmeasure VLBI2_A (falling edge) or Vmeasure VLBI2_D (rising edge)
or when
c) VLBI3 selected with BVLS[1:0] = 0x2
Vmeasure VLBI3_A (falling edge) or Vmeasure VLBI3_D (rising edge)
or when
d) VLBI4 selected with BVLS[1:0] = 0x3
Vmeasure VLBI4_A (falling edge) or Vmeasure VLBI4_D (rising edge)
then BVLC is set. BVLC status bit indicates that a low voltage at pin VSUP is present. The Low Voltage
Interrupt flag (BVLIF) is set to 1 when the Voltage Low Condition (BVLC) changes state . The Interrupt
flag BVLIF can only be cleared by writing a 1. If the interrupt is enabled by bit BVLIE the module requests
an interrupt to MCU (BATI).
10.4.2.2 BATS Voltage High Condition Interrupt (BVHI)
To use the Voltage High Interrupt the Level Sensing must be enabled (BSUSE=1).
Table 10-6. BATS Interrupt Sources
Module Interrupt Source Module Internal Interrupt Source Local Enable
BATS Interrupt (BATI) BATS Voltage Low Condition Interrupt (BVLI) BVLIE = 1
BATS Voltage High Condition Interrupt (BVHI) BVHIE = 1
Chapter 10 Supply Voltage Sensor - (BATSV3)
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Freescale Semiconductor 431
If measured when
a) VHBI1 selected with BVHS = 0
Vmeasure VHBI1_A (rising edge) or Vmeasure VHBI1_D (falling edge)
or when
a) VHBI2 selected with BVHS = 1
Vmeasure VHBI2_A (rising edge) or Vmeasure VHBI2_D (falling edge)
then BVHC is set. BVHC status bit indicates that a high voltage at pin VSUP is present. The High Voltage
Interrupt flag (BVHIF) is set to 1 when a Voltage High Condition (BVHC) changes state. The Interrupt
flag BVHIF can only be cleared by writing a 1. If the interrupt is enabled by bit BVHIE the module
requests an interrupt to MCU (BATI).
Chapter 10 Supply Voltage Sensor - (BATSV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
432 Freescale Semiconductor
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 433
Chapter 11
Timer Module (TIM16B4CV3) Block Description
11.1 Introduction
The basic scalable timer consists of a 16-bit, software-programmable counter driven by a flexible
programmable prescaler.
This timer can be used for many purposes, including input waveform measurements while simultaneously
generating an output waveform.
This timer could contain up to 4 input capture/output compare channels . The input capture function is used
to detect a selected transition edge and record the time. The output compare function is used for generating
output signals or for timer software delays.
A full access for the counter registers or the input capture/output compare registers should take place in
one clock cycle. Accessing high byte and low byte separately for all of these registers may not yield the
same result as accessing them in one word.
11.1.1 Features
The TIM16B4CV3 includes these distinctive features:
Up to 4 channels available. (refer to device specification for exact number)
All channels have same input capture/output compare functionality.
Clock prescaling.
16-bit counter.
11.1.2 Modes of Operation
Stop: Timer is off because clocks are stopped.
Freeze: Timer counter keeps on running, unless TSFRZ in TSCR1 is set to 1.
Wait: Counters keeps on running, unless TSWAI in TSCR1 is set to 1.
Normal: Timer counter keep on running, unless TEN in TSCR1 is cleared to 0.
Table 11-1. Revision History
V03.03 Jan,14,2013
-single source generate different channel guide
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
434 Freescale Semiconductor
11.1.3 Block Diagrams
Figure 11-1. TIM16B4CV3 Block Diagram
Figure 11-2. Interrupt Flag Setting
11.2 External Signal Description
The TIM16B4CV3 module has a selected number of external pins. Refer to device specification for exact
number.
Prescaler
16-bit Counter
Input capture
Output compare IOC0
IOC2
IOC1
IOC3
Timer overflow
interrupt
Timer channel 0
interrupt
Timer channel 2
interrupt
Registers
Bus clock
Input capture
Output compare
Input capture
Output compare
Input capture
Output compare
Channel 0
Channel 1
Channel 2
Channel 3
Timer channel 1
interrupt
Timer channel 3
interrupt
IOCn
Edge detector
16-bit Main Timer
TCn Input Capture Reg.
Set CnF Interrupt
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 435
11.2.1 IOC3 - IOC0 — Input Capture and Output Compare Channel 3-0
Those pins serve as input capture or output compare for TIM16B4CV3 channel .
NOTE
For the description of interrupts see Section 11.6, “Interrupts”.
11.3 Memory Map and Register Definition
This section provides a detailed description of all memory and registers.
11.3.1 Module Memory Map
The memory map for the TIM16B4CV3 module is given below in Figure 11-3. The address listed for each
register is the address offset. The total address for each register is the sum of the base address for the
TIM16B4CV3 module and the address offset for each register.
11.3.2 Register Descriptions
This section consists of register descriptions in address order . Each description includes a standard register
diagram with an associated figure number. Details of register bit and field function follow the register
diagrams, in bit order.
Only bits related to implemented channels are valid.
Register
Name Bit 765 4 3 2 1Bit 0
0x0000
TIOS
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED IOS3 IOS2 IOS1 IOS0
W
0x0001
CFORC
R00000000
W RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED FOC3 FOC2 FOC1 FOC0
0x0004
TCNTH
RTCNT15 TCNT14 TCNT13 TCNT12 TCNT11 TCNT10 TCNT9 TCNT8
W
0x0005
TCNTL
RTCNT7 TCNT6 TCNT5 TCNT4 TCNT3 TCNT2 TCNT1 TCNT0
W
0x0006
TSCR1
RTEN TSWAI TSFRZ TFFCA PRNT 000
W
0x0007
TTOV
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED TOV3 TOV2 TOV1 TOV0
W
0x0008
TCTL1
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
W
0x0009
TCTL2
ROM3OL3OM2OL2OM1OL1OM0OL0
W
0x000A
TCTL3
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
W
0x000B
TCTL4
REDG3B EDG3A EDG2B EDG2A EDG1B EDG1A EDG0B EDG0A
W
Figure 11-3. TIM16B4CV3 Register Summary (Sheet 1 of 2)
Chapter 11 Timer Module (TIM16B4CV3) Block Description
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436 Freescale Semiconductor
11.3.2.1 Timer Input Capture/Output Compare Select (TIOS)
Read: Anytime
Write: Anytime
0x000C
TIE
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED C3I C2I C1I C0I
W
0x000D
TSCR2
RTOI 000
RESERV
ED PR2 PR1 PR0
W
0x000E
TFLG1
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED C3F C2F C1F C0F
W
0x000F
TFLG2
RTOF 0000000
W
0x0010–0x001F
TCxH–TCxL(1)
RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
RBit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
W
0x0024–0x002B
Reserved
R
W
0x002C
OCPD
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED OCPD3 OCPD2 OCPD1 OCPD0
W
0x002D
Reserved
R
0x002E
PTPSR
RPTPS7 PTPS6 PTPS5 PTPS4 PTPS3 PTPS2 PTPS1 PTPS0
W
0x002F
Reserved
R
W
1. The register is available only if corresponding channel exists.
Module Base + 0x0000
76543210
R
RESERVED RESERVED RESERVED RESERVED IOS3 IOS2 IOS1 IOS0
W
Reset00000000
Figure 11-4. Timer Input Capture/Output Compare Select (TIOS)
Register
Name Bit 765 4 3 2 1Bit 0
Figure 11-3. TIM16B4CV3 Register Summary (Sheet 2 of 2)
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 437
11.3.2.2 Timer Compare Force Register (CFORC)
Read: Anytime but will always return 0x0000 (1 state is transient)
Write: Anytime
11.3.2.3 Timer Count Register (TCNT)
Table 11-2. TIOS Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
3:0
IOS[3:0]
Input Capture or Output Compare Channel Configuration
0 The corresponding implemented channel acts as an input capture.
1 The corresponding implemented channel acts as an output compare.
Module Base + 0x0001
76543210
R00000000
W RESERVED RESERVED RESERVED RESERVED FOC3 FOC2 FOC1 FOC0
Reset00000000
Figure 11-5. Timer Compare Force Register (CFORC)
Table 11-3. CFORC Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
3:0
FOC[3:0]
Note: Force Output Compare Action for Channel 3:0 — A write to this register with the corresponding data
bit(s) set causes the action which is programmed for output compare “x” to occur immediately. The action
taken is the same as if a successful comparison had just taken place with the TCx register except the
interrupt flag does not get set. If forced output compare on any channel occurs at the same time as the
successful output compare then forced output compare action will take precedence and interrupt flag won’t
get set.
Module Base + 0x0004
1 5 14 13 12 11 10 9 9
R
TCNT15 TCNT14 TCNT13 TCNT12 TCNT11 TCNT10 TCNT9 TCNT8
W
Reset00000000
Figure 11-6. Timer Count Register High (TCNTH)
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
438 Freescale Semiconductor
The 16-bit main timer is an up counter.
A full access for the counter register should take place in one clock cycle. A separate read/write for high
byte and low byte will give a different result than accessing them as a word.
Read: Anytime
Write: Has no meaning or effect in the normal mode; only writable in special mode.
The period of the first count after a write to the TCNT registers may be a different size because the write
is not synchronized with the prescaler clock.
11.3.2.4 Timer System Control Register 1 (TSCR1)
Read: Anytime
Write: Anytime
Module Base + 0x0005
76543210
R
TCNT7 TCNT6 TCNT5 TCNT4 TCNT3 TCNT2 TCNT1 TCNT0
W
Reset00000000
Figure 11-7. Timer Count Register Low (TCNTL)
Module Base + 0x0006
76543210
R
TEN TSWAI TSFRZ TFFCA PRNT
000
W
Reset00000000
= Unimplemented or Reserved
Figure 11-8. Timer System Control Register 1 (TSCR1)
Table 11-4. TSCR1 Field Descriptions
Field Description
7
TEN
Timer Enable
0 Disables the main timer, including the counter. Can be used for reducing power consumption.
1 Allows the timer to function normally.
If for any reason the timer is not active, there is no 64 clock for the pulse accumulator because the 64 is
generated by the timer prescaler.
6
TSWAI
Timer Module Stops While in Wait
0 Allows the timer module to continue running during wait.
1 Disables the timer module when the MCU is in the wait mode. Timer interrupts cannot be used to get the MCU
out of wait.
TSWAI also affects pulse accumulator.
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 439
11.3.2.5 Timer Toggle On Overflow Register 1 (TTOV)
Read: Anytime
Write: Anytime
5
TSFRZ
Timer Stops While in Freeze Mode
0 Allows the timer counter to continue running while in freeze mode.
1 Disables the timer counter whenever the MCU is in freeze mode. This is useful for emulation.
TSFRZ does not stop the pulse accumulator.
4
TFFCA
Timer Fast Flag Clear All
0 Allows the timer flag clearing to function normally.
1 For TFLG1(0x000E), a read from an input capture or a write to the output compare channel (0x0010–0x001F)
causes the corresponding channel flag, CnF, to be cleared. For TFLG2 (0x000F), any access to the TCNT
register (0x0004, 0x0005) clears the TOF flag. This has the advantage of eliminating software overhead in a
separate clear sequence. Extra care is required to avoid accidental flag clearing due to unintended accesses.
3
PRNT
Precision Timer
0 Enables legacy timer. PR0, PR1, and PR2 bits of the TSCR2 register are used for timer counter prescaler
selection.
1 Enables precision timer. All bits of the PTPSR register are used for Precision Timer Prescaler Selection, and
all bits.
This bit is writable only once out of reset.
Module Base + 0x0007
76543210
R
RESERVED RESERVED RESERVED RESERVED TOV3 TOV2 TOV1 TOV0
W
Reset00000000
Figure 11-9. Timer Toggle On Overflow Register 1 (TTOV)
Table 11-5. TTOV Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
3:0
TOV[3:0]
Toggle On Overflow BitsTOVx toggles output compare pin on overflow. This feature only takes effect when
in output compare mode. When set, it takes precedence over forced output compare
0 Toggle output compare pin on overflow feature disabled.
1 Toggle output compare pin on overflow feature enabled.
Table 11-4. TSCR1 Field Descriptions (continued)
Field Description
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
440 Freescale Semiconductor
11.3.2.6 Timer Control Register 1/Timer Control Register 2 (TCTL1/TCTL2)
Read: Anytime
Write: Anytime
Module Base + 0x0008
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
W
Reset00000000
Figure 11-10. Timer Control Register 1 (TCTL1)
Module Base + 0x0009
76543210
R
OM3 OL3 OM2 OL2 OM1 OL1 OM0 OL0
W
Reset00000000
Figure 11-11. Timer Control Register 2 (TCTL2)
Table 11-6. TCTL1/TCTL2 Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero
Field Description
3:0
OMx
Output Mode — These four pairs of control bits are encoded to specify the output action to be taken as a result
of a successful OCx compare. When either OMx or OLx is 1, the pin associated with OCx becomes an output
tied to OCx.
Note: For an output line to be driven by an OCx the OCPDx must be cleared.
3:0
OLx
Output Level — These fourpairs of control bits are encoded to specify the output action to be taken as a result
of a successful OCx compare. When either OMx or OLx is 1, the pin associated with OCx becomes an output
tied to OCx.
Note: For an output line to be driven by an OCx the OCPDx must be cleared.
Table 11-7. Compare Result Output Action
OMx OLx Action
0 0 No output compare
action on the timer output signal
0 1 Toggle OCx output line
1 0 Clear OCx output line to zero
1 1 Set OCx output line to one
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 441
11.3.2.7 Timer Control Register 3/Timer Control Register 4 (TCTL3 and TCTL4)
Read: Anytime
Write: Anytime.
Module Base + 0x000A
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
W
Reset00000000
Figure 11-12. Timer Control Register 3 (TCTL3)
Module Base + 0x000B
76543210
R
EDG3B EDG3A EDG2B EDG2A EDG1B EDG1A EDG0B EDG0A
W
Reset00000000
Figure 11-13. Timer Control Register 4 (TCTL4)
Table 11-8. TCTL3/TCTL4 Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
3:0
EDGnB
EDGnA
Input Capture Edge Control These four pairs of control bits configure the input capture edge detector
circuits.
Table 11-9. Edge Detector Circuit Configuration
EDGnB EDGnA Configuration
0 0 Capture disabled
0 1 Capture on rising edges only
1 0 Capture on falling edges only
1 1 Capture on any edge (rising or falling)
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
442 Freescale Semiconductor
11.3.2.8 Timer Interrupt Enable Register (TIE)
Read: Anytime
Write: Anytime.
11.3.2.9 Timer System Control Register 2 (TSCR2)
Read: Anytime
Write: Anytime.
Module Base + 0x000C
76543210
R
RESERVED RESERVED RESERVED RESERVED C3I C2I C1I C0I
W
Reset00000000
Figure 11-14. Timer Interrupt Enable Register (TIE)
Table 11-10. TIE Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero
Field Description
3:0
C3I:C0I
Input Capture/Output Compare “x” Interrupt Enable — The bits in TIE correspond bit-for-bit with the bits in
the TFLG1 status register. If cleared, the corresponding flag is disabled from causing a hardware interrupt. If set,
the corresponding flag is enabled to cause a interrupt.
Module Base + 0x000D
76543210
R
TOI
000
RESERVED PR2 PR1 PR0
W
Reset00000000
= Unimplemented or Reserved
Figure 11-15. Timer System Control Register 2 (TSCR2)
Table 11-11. TSCR2 Field Descriptions
Field Description
7
TOI
Timer Overflow Interrupt Enable
0 Interrupt inhibited.
1 Hardware interrupt requested when TOF flag set.
2:0
PR[2:0]
Timer Prescaler Select — These three bits select the frequency of the timer prescaler clock derived from the
Bus Clock as shown in Table 11-12.
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 443
NOTE
The newly selected prescale factor will not take effect until the next
synchronized edge where all prescale counter stages equal zero.
11.3.2.10 Main Timer Interrupt Flag 1 (TFLG1)
Read: Anytime
W rite: Used in the clearing mechanism (set bits cause corresponding bits to be cleared). Writing a zero will
not affect current status of the bit.
Table 11-12. Timer Clock Selection
PR2 PR1 PR0 Timer Clock
0 0 0 Bus Clock / 1
0 0 1 Bus Clock / 2
0 1 0 Bus Clock / 4
0 1 1 Bus Clock / 8
1 0 0 Bus Clock / 16
1 0 1 Bus Clock / 32
1 1 0 Bus Clock / 64
1 1 1 Bus Clock / 128
Module Base + 0x000E
76543210
R
RESERVED RESERVED RESERVED RESERVED C3F C2F C1F C0F
W
Reset00000000
Figure 11-16. Main Timer Interrupt Flag 1 (TFLG1)
Table 11-13. TRLG1 Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
3:0
C[3:0]F
Input Capture/Output Compare Channel “x” Flag — These flags are set when an input capture or output
compare event occurs. Clearing requires writing a one to the corresponding flag bit while TEN is set to one.
Note: When TFFCA bit in TSCR register is set, a read from an input capture or a write into an output compare
channel (0x0010–0x001F) will cause the corresponding channel flag CxF to be cleared.
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
444 Freescale Semiconductor
11.3.2.11 Main Timer Interrupt Flag 2 (TFLG2)
TFLG2 indicates when interrupt conditions have occurred. To clear a bit in the flag register, write the bit
to one while TEN bit of TSCR1 .
Read: Anytime
Write: Used in clearing mechanism (set bits cause corresponding bits to be cleared).
Any access to TCNT will clear TFLG2 register if the TFFCA bit in TSCR register is set.
Module Base + 0x000F
76543210
R
TOF
0000000
W
Reset00000000
Unimplemented or Reserved
Figure 11-17. Main Timer Interrupt Flag 2 (TFLG2)
Table 11-14. TRLG2 Field Descriptions
Field Description
7
TOF
Timer Overflow Flag — Set when 16-bit free-running timer overflows from 0xFFFF to 0x0000. Clearing this bit
requires writing a one to bit 7 of TFLG2 register while the TEN bit of TSCR1 is set to one .
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 445
11.3.2.12 Timer Input Capture/Output Compare Registers High and Low 0–
3(TCxH and TCxL)
1This register is available only when the corresponding channel exists and is reserved if that channel does not exist. Writes to
a reserved register have no functional effect. Reads from a reserved register return zeroes.
Depending on the TIOS bit for the corresponding channel, these registers are used to latch the value of the
free-running counter when a defined transition is sensed by the corresponding input capture edge detector
or to trigger an output action for output compare.
Read: Anytime
Write: Anytime for output compare function.Writes to these registers have no meaning or effect during
input capture. All timer input capture/output compare registers are reset to 0x0000.
NOTE
Read/W rite access in byte mode for high byte should take place before low
byte otherwise it will give a different result.
Module Base + 0x0010 = TC0H
0x0012 = TC1H
0x0014=TC2H
0x0016=TC3H
0x0018=RESERVD
0x001A=RESERVD
0x001C=RESERVD
0x001E=RESERVD
15 14 13 12 11 10 9 0
R
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
Reset00000000
Figure 11-18. Timer Input Capture/Output Compare Register x High (TCxH)
Module Base + 0x0011 = TC0L
0x0013 = TC1L
0x0015 =TC2L
0x0017=TC3L
0x0019 =RESERVD
0x001B=RESERVD
0x001D=RESERVD
0x001F=RESERVD
76 543210
R
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
W
Reset00000000
Figure 11-19. Timer Input Capture/Output Compare Register x Low (TCxL)
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
446 Freescale Semiconductor
11.3.2.13 Output Compare Pin Disconnect Register(OCPD)
Read: Anytime
Write: Anytime
All bits reset to zero.
11.3.2.14 Precision Timer Prescaler Select Register (PTPSR)
Read: Anytime
Write: Anytime
All bits reset to zero.
Module Base + 0x002C
76543210
R
RESERVED RESERVED RESERVED RESERVED OCPD3 OCPD2 OCPD1 OCPD0
W
Reset00000000
Figure 11-20. Output Compare Pin Disconnect Register (OCPD)
Table 11-15. OCPD Field Description
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
3:0
OCPD[3:0]
Output Compare Pin Disconnect Bits
0 Enables the timer channel port. Output Compare action will occur on the channel pin. These bits do not affect
the input capture .
1 Disables the timer channel port. Output Compare action will not occur on the channel pin, but the output
compare flag still become set.
Module Base + 0x002E
76543210
R
PTPS7 PTPS6 PTPS5 PTPS4 PTPS3 PTPS2 PTPS1 PTPS0
W
Reset00000000
Figure 11-21. Precision Timer Prescaler Select Register (PTPSR)
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 447
...
The Prescaler can be calculated as follows depending on logical value of the PTPS[7:0] and PRNT bit:
PRNT = 1 : Prescaler = PTPS[7:0] + 1
Table 11-17. Precision Timer Prescaler Selection Examples when PRNT = 1
11.4 Functional Description
This section provides a complete functional description of the timer TIM16B4CV3 block. Please refer to
the detailed timer block diagram in Figure 11-22 as necessary.
Table 11-16. PTPSR Field Descriptions
Field Description
7:0
PTPS[7:0]
Precision Timer Prescaler Select Bits These eight bits specify the division rate of the main Timer prescaler.
These are effective only when the PRNT bit of TSCR1 is set to 1. Table 11-17 shows some selection examples
in this case.
The newly selected prescale factor will not take effect until the next synchronized edge where all prescale counter
stages equal zero.
PTPS7 PTPS6 PTPS5 PTPS4 PTPS3 PTPS2 PTPS1 PTPS0 Prescale
Factor
00000000 1
00000001 2
00000010 3
00000011 4
-------- -
-------- -
-------- -
00010011 20
00010100 21
00010101 22
-------- -
-------- -
-------- -
11111100 253
11111101 254
11111110 255
11111111 256
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
448 Freescale Semiconductor
Figure 11-22. Detailed Timer Block Diagram
11.4.1 Prescaler
The prescaler divides the Bus clock by 1, 2, 4, 8, 16, 32, 64 or 128. The prescaler select bits, PR[2:0], select
the prescaler divisor. PR[2:0] are in timer system control register 2 (TSCR2).
The prescaler divides the Bus clock by a prescalar value. Prescaler select bits PR[2:0] of in timer system
control register 2 (TSCR2) are set to define a prescalar value that generates a divide by 1, 2, 4, 8, 16, 32,
64 and 128 when the PRNT bit in TSCR1 is disabled.
PRESCALER
CHANNEL 0
IOC0 PIN
16-BIT COUNTER
LOGIC
PR[2:1:0]
TC0
16-BIT COMPARATOR
TCNT(hi):TCNT(lo)
CHANNEL 1
TC1
16-BIT COMPARATOR
INTERRUPT
LOGIC
TOF
TOI
C0F
C1F
EDGE
DETECT
IOC1 PIN
LOGIC
EDGE
DETECT
CxF
CHANNELn-1
TCn-1
16-BIT COMPARATOR Cn-1F
IOCn-1 PIN
LOGIC
EDGE
DETECT
OM:OL0
TOV0
OM:OL1
TOV1
OM:OLn-1
TOVn-1
EDG1A EDG1B
EDG(n-1)A
EDG(n-1)B
EDG0B
CxI
CH. n-1COMPARE
CH.n-1 CAPTURE
CH. 1 CAPTURE
IOC1 PIN
IOC0 PIN
IOCn-1 PIN
TE
CH. 1 COMPARE
CH. 0COMPARE
CH. 0 CAPTURE
CHANNEL2
EDG0A
IOC0
IOC1
IOCn-1
TOF
C0F
C1F
Cn-1F
MUX
PRE-PRESCALER
PTPSR[7:0]
tim source Clock
1
0
PRNT
n is channels number.
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 449
By enabling the PRNT bit of the TSCR1 register, the performance of the timer can be enhanced. In this
case, it is possible to set additional prescaler settings for the main timer counter in the present timer by
using PTPSR[7:0] bits of PTPSR register generating divide by 1, 2, 3, 4,....20, 21, 22, 23,......255, or 256.
11.4.2 Input Capture
Clearing the I/O (input/output) select bit, IOSx, configures channel x as an input capture channel. The
input capture function captures the time at which an external event occurs. When an active edge occurs on
the pin of an input capture channel, the timer transfers the value in the timer counter into the timer channel
registers, TCx.
The minimum pulse width for the input capture input is greater than two Bus clocks.
An input capture on channel x sets the CxF flag. The CxI bit enables the CxF flag to generate interrupt
requests. T imer module must stay enabled (TEN bit of TSCR1 register must be set to one) while clearing
CxF (writing one to CxF).
11.4.3 Output Compare
Setting the I/O select bit, IOSx, configures channel x when available as an output compare channel. The
output compare function can generate a periodic pulse with a programmable polarity, duration, and
frequency . When the timer counter reaches the value in the channel registers of an output compare channel,
the timer can set, clear, or toggle the channel pin if the corresponding OCPDx bit is set to zero. An output
compare on channel x sets the CxF flag. The CxI bit enables the CxF flag to generate interrupt requests.
Timer module must stay enabled (TEN bit of TSCR1 register must be set to one) while clearing CxF
(writing one to CxF).
The output mode and level bits, OMx and OLx, select set, clear, toggle on output compare. Clearing both
OMx and OLx results in no output compare action on the output compare channel pin.
Setting a force output compare bit, FOCx, causes an output compare on channel x. A forced output
compare does not set the channel flag.
Writing to the timer port bit of an output compare pin does not affect the pin state. The value written is
stored in an internal latch. W h en the pin becomes available for general-purpose output, the last value
written to the bit appears at the pin.
11.4.3.1 OC Channel Initialization
The internal register whose output drives OCx can be programmed before the timer drives OCx. The
desired state can be programmed to this internal register by writing a one to CFORCx bit with TIOSx,
OCPDx and TEN bits set to one.
Set OCx: Write a 1 to FOCx while TEN=1, IOSx=1, OMx=1, OLx=1 and OCPDx=1
Clear OCx: Write a 1 to FOCx while TEN=1, IOSx=1, OMx=1, OLx=0 and OCPDx=1
Chapter 11 Timer Module (TIM16B4CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
450 Freescale Semiconductor
Setting OCPDx to zero allows the internal register to drive the programmed state to OCx. This allows a
glitch free switch over of port from general purpose I/O to timer output once the OCPDx bit is set to zero.
11.5 Resets
The reset state of each individual bit is listed within Section 11.3, “Memory Map and Register Definition”
which details the registers and their bit fields
11.6 Interrupts
This section describes interrupts originated by the TIM16B4CV3 block. Table 11-18 lists the interrupts
generated by the TIM16B4CV3 to communicate with the MCU.
The TIM16B4CV3 could use up to 5 interrupt vectors. The interrupt vector of fsets and interrupt numbers
are chip dependent.
11.6.1 Channel [3:0] Interrupt (C[3:0]F)
This active high outputs will be asserted by the module to request a timer channel 7 – 0 interrupt. The TIM
block only generates the interrupt and does not service it. Only bits related to implemented channels are
valid.
11.6.2 Timer Overflow Interrupt (TOF)
This active high output will be asserted by the module to request a timer overflow interrupt. The TIM block
only generates the interrupt and does not service it.
Table 11-18. TIM16B4CV3 Interrupts
Interrupt Offset Vector Priority Source Description
C[3:0]F Timer Channel 3–0 Active high timer channel interrupts 3–0
TOF Timer Overflow Timer Overflow interrupt
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 451
Chapter 12
Timer Module (TIM16B2CV3) Block Description
12.1 Introduction
The basic scalable timer consists of a 16-bit, software-programmable counter driven by a flexible
programmable prescaler.
This timer can be used for many purposes, including input waveform measurements while simultaneously
generating an output waveform.
This timer could contain up to 2 input capture/output compare channels . The input capture function is used
to detect a selected transition edge and record the time. The output compare function is used for generating
output signals or for timer software delays.
A full access for the counter registers or the input capture/output compare registers should take place in
one clock cycle. Accessing high byte and low byte separately for all of these registers may not yield the
same result as accessing them in one word.
12.1.1 Features
The TIM16B2CV3 includes these distinctive features:
Up to 2 channels available. (refer to device specification for exact number)
All channels have same input capture/output compare functionality.
Clock prescaling.
16-bit counter.
12.1.2 Modes of Operation
Stop: Timer is off because clocks are stopped.
Freeze: Timer counter keeps on running, unless TSFRZ in TSCR1 is set to 1.
Wait: Counters keeps on running, unless TSWAI in TSCR1 is set to 1.
Normal: Timer counter keep on running, unless TEN in TSCR1 is cleared to 0.
Table 12-1. Revision History
V03.03 Jan,14,2013
-single source generate different channel guide
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
452 Freescale Semiconductor
12.1.3 Block Diagrams
Figure 12-1. TIM16B2CV3 Block Diagram
Figure 12-2. Interrupt Flag Setting
12.2 External Signal Description
The TIM16B2CV3 module has a selected number of external pins. Refer to device specification for exact
number.
12.2.1 IOC1 - IOC0 — Input Capture and Output Compare Channel 1-0
Those pins serve as input capture or output compare for TIM16B2CV3 channel .
NOTE
For the description of interrupts see Section 12.6, “Interrupts”.
Prescaler
16-bit Counter
Input capture
Output compare IOC0
IOC1
Timer overflow
interrupt
Timer channel 0
interrupt
Timer channel 1
interrupt
Registers
Bus clock
Input capture
Output compare
Channel 0
Channel 1
IOCn
Edge detector
16-bit Main Timer
TCn Input Capture Reg.
Set CnF Interrupt
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 453
12.3 Memory Map and Register Definition
This section provides a detailed description of all memory and registers.
12.3.1 Module Memory Map
The memory map for the TIM16B2CV3 module is given below in Figure 12-3. The address listed for each
register is the address offset. The total address for each register is the sum of the base address for the
TIM16B2CV3 module and the address offset for each register.
12.3.2 Register Descriptions
This section consists of register descriptions in address order . Each description includes a standard register
diagram with an associated figure number. Details of register bit and field function follow the register
diagrams, in bit order.
Only bits related to implemented channels are valid.
Register
Name Bit 765 4 3 2 1Bit 0
0x0000
TIOS
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED IOS1 IOS0
W
0x0001
CFORC
R00000000
W RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED FOC1 FOC0
0x0004
TCNTH
RTCNT15 TCNT14 TCNT13 TCNT12 TCNT11 TCNT10 TCNT9 TCNT8
W
0x0005
TCNTL
RTCNT7 TCNT6 TCNT5 TCNT4 TCNT3 TCNT2 TCNT1 TCNT0
W
0x0006
TSCR1
RTEN TSWAI TSFRZ TFFCA PRNT 000
W
0x0007
TTOV
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED TOV1 TOV0
W
0x0008
TCTL1
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
W
0x0009
TCTL2
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED OM1OL1OM0OL0
W
0x000A
TCTL3
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
W
0x000B
TCTL4
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED EDG1B EDG1A EDG0B EDG0A
W
0x000C
TIE
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED C1I C0I
W
0x000D
TSCR2
RTOI000
RESERV
ED PR2 PR1 PR0
W
0x000E
TFLG1
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED C1F C0F
W
Figure 12-3. TIM16B2CV3 Register Summary (Sheet 1 of 2)
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
454 Freescale Semiconductor
12.3.2.1 Timer Input Capture/Output Compare Select (TIOS)
Read: Anytime
Write: Anytime
0x000F
TFLG2
RTOF 0000000
W
0x0010–0x001F
TCxH–TCxL(1)
RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
RBit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
W
0x0024–0x002B
Reserved
R
W
0x002C
OCPD
RRESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED
RESERV
ED OCPD1 OCPD0
W
0x002D
Reserved
R
0x002E
PTPSR
RPTPS7 PTPS6 PTPS5 PTPS4 PTPS3 PTPS2 PTPS1 PTPS0
W
0x002F
Reserved
R
W
1. The register is available only if corresponding channel exists.
Module Base + 0x0000
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED IOS1 IOS0
W
Reset00000000
Figure 12-4. Timer Input Capture/Output Compare Select (TIOS)
Table 12-2. TIOS Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
1:0
IOS[1:0]
Input Capture or Output Compare Channel Configuration
0 The corresponding implemented channel acts as an input capture.
1 The corresponding implemented channel acts as an output compare.
Register
Name Bit 765 4 3 2 1Bit 0
Figure 12-3. TIM16B2CV3 Register Summary (Sheet 2 of 2)
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 455
12.3.2.2 Timer Compare Force Register (CFORC)
Read: Anytime but will always return 0x0000 (1 state is transient)
Write: Anytime
12.3.2.3 Timer Count Register (TCNT)
The 16-bit main timer is an up counter.
Module Base + 0x0001
76543210
R00000000
W RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED FOC1 FOC0
Reset00000000
Figure 12-5. Timer Compare Force Register (CFORC)
Table 12-3. CFORC Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
1:0
FOC[1:0]
Note: Force Output Compare Action for Channel 1:0 — A write to this register with the corresponding data
bit(s) set causes the action which is programmed for output compare “x” to occur immediately. The action
taken is the same as if a successful comparison had just taken place with the TCx register except the
interrupt flag does not get set. If forced output compare on any channel occurs at the same time as the
successful output compare then forced output compare action will take precedence and interrupt flag won’t
get set.
Module Base + 0x0004
1 5 14 13 12 11 10 9 9
R
TCNT15 TCNT14 TCNT13 TCNT12 TCNT11 TCNT10 TCNT9 TCNT8
W
Reset00000000
Figure 12-6. Timer Count Register High (TCNTH)
Module Base + 0x0005
76543210
R
TCNT7 TCNT6 TCNT5 TCNT4 TCNT3 TCNT2 TCNT1 TCNT0
W
Reset00000000
Figure 12-7. Timer Count Register Low (TCNTL)
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
456 Freescale Semiconductor
A full access for the counter register should take place in one clock cycle. A separate read/write for high
byte and low byte will give a different result than accessing them as a word.
Read: Anytime
Write: Has no meaning or effect in the normal mode; only writable in special mode.
The period of the first count after a write to the TCNT registers may be a different size because the write
is not synchronized with the prescaler clock.
12.3.2.4 Timer System Control Register 1 (TSCR1)
Read: Anytime
Write: Anytime
Module Base + 0x0006
76543210
R
TEN TSWAI TSFRZ TFFCA PRNT
000
W
Reset00000000
= Unimplemented or Reserved
Figure 12-8. Timer System Control Register 1 (TSCR1)
Table 12-4. TSCR1 Field Descriptions
Field Description
7
TEN
Timer Enable
0 Disables the main timer, including the counter. Can be used for reducing power consumption.
1 Allows the timer to function normally.
If for any reason the timer is not active, there is no 64 clock for the pulse accumulator because the 64 is
generated by the timer prescaler.
6
TSWAI
Timer Module Stops While in Wait
0 Allows the timer module to continue running during wait.
1 Disables the timer module when the MCU is in the wait mode. Timer interrupts cannot be used to get the MCU
out of wait.
TSWAI also affects pulse accumulator.
5
TSFRZ
Timer Stops While in Freeze Mode
0 Allows the timer counter to continue running while in freeze mode.
1 Disables the timer counter whenever the MCU is in freeze mode. This is useful for emulation.
TSFRZ does not stop the pulse accumulator.
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 457
12.3.2.5 Timer Toggle On Overflow Register 1 (TTOV)
Read: Anytime
Write: Anytime
4
TFFCA
Timer Fast Flag Clear All
0 Allows the timer flag clearing to function normally.
1 For TFLG1(0x000E), a read from an input capture or a write to the output compare channel (0x0010–0x001F)
causes the corresponding channel flag, CnF, to be cleared. For TFLG2 (0x000F), any access to the TCNT
register (0x0004, 0x0005) clears the TOF flag. This has the advantage of eliminating software overhead in a
separate clear sequence. Extra care is required to avoid accidental flag clearing due to unintended accesses.
3
PRNT
Precision Timer
0 Enables legacy timer. PR0, PR1, and PR2 bits of the TSCR2 register are used for timer counter prescaler
selection.
1 Enables precision timer. All bits of the PTPSR register are used for Precision Timer Prescaler Selection, and
all bits.
This bit is writable only once out of reset.
Module Base + 0x0007
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED TOV1 TOV0
W
Reset00000000
Figure 12-9. Timer Toggle On Overflow Register 1 (TTOV)
Table 12-5. TTOV Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
1:0
TOV[1:0]
Toggle On Overflow BitsTOVx toggles output compare pin on overflow. This feature only takes effect when
in output compare mode. When set, it takes precedence over forced output compare
0 Toggle output compare pin on overflow feature disabled.
1 Toggle output compare pin on overflow feature enabled.
Table 12-4. TSCR1 Field Descriptions (continued)
Field Description
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
458 Freescale Semiconductor
12.3.2.6 Timer Control Register 1/Timer Control Register 2 (TCTL1/TCTL2)
Read: Anytime
Write: Anytime
Module Base + 0x0008
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
W
Reset00000000
Figure 12-10. Timer Control Register 1 (TCTL1)
Module Base + 0x0009
76543210
R
RESERVED RESERVED RESERVED RESERVED OM1 OL1 OM0 OL0
W
Reset00000000
Figure 12-11. Timer Control Register 2 (TCTL2)
Table 12-6. TCTL1/TCTL2 Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero
Field Description
1:0
OMx
Output Mode — These two pairs of control bits are encoded to specify the output action to be taken as a result
of a successful OCx compare. When either OMx or OLx is 1, the pin associated with OCx becomes an output
tied to OCx.
Note: For an output line to be driven by an OCx the OCPDx must be cleared.
1:0
OLx
Output Level — These two pairs of control bits are encoded to specify the output action to be taken as a result
of a successful OCx compare. When either OMx or OLx is 1, the pin associated with OCx becomes an output
tied to OCx.
Note: For an output line to be driven by an OCx the OCPDx must be cleared.
Table 12-7. Compare Result Output Action
OMx OLx Action
0 0 No output compare
action on the timer output signal
0 1 Toggle OCx output line
1 0 Clear OCx output line to zero
1 1 Set OCx output line to one
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 459
12.3.2.7 Timer Control Register 3/Timer Control Register 4 (TCTL3 and TCTL4)
Read: Anytime
Write: Anytime.
Module Base + 0x000A
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
W
Reset00000000
Figure 12-12. Timer Control Register 3 (TCTL3)
Module Base + 0x000B
76543210
R
RESERVED RESERVED RESERVED RESERVED EDG1B EDG1A EDG0B EDG0A
W
Reset00000000
Figure 12-13. Timer Control Register 4 (TCTL4)
Table 12-8. TCTL3/TCTL4 Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
1:0
EDGnB
EDGnA
Input Capture Edge Control These two pairs of control bits configure the input capture edge detector
circuits.
Table 12-9. Edge Detector Circuit Configuration
EDGnB EDGnA Configuration
0 0 Capture disabled
0 1 Capture on rising edges only
1 0 Capture on falling edges only
1 1 Capture on any edge (rising or falling)
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
460 Freescale Semiconductor
12.3.2.8 Timer Interrupt Enable Register (TIE)
Read: Anytime
Write: Anytime.
12.3.2.9 Timer System Control Register 2 (TSCR2)
Read: Anytime
Write: Anytime.
Module Base + 0x000C
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED C1I C0I
W
Reset00000000
Figure 12-14. Timer Interrupt Enable Register (TIE)
Table 12-10. TIE Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero
Field Description
1:0
C1I:C0I
Input Capture/Output Compare “x” Interrupt Enable — The bits in TIE correspond bit-for-bit with the bits in
the TFLG1 status register. If cleared, the corresponding flag is disabled from causing a hardware interrupt. If set,
the corresponding flag is enabled to cause a interrupt.
Module Base + 0x000D
76543210
R
TOI
000
RESERVED PR2 PR1 PR0
W
Reset00000000
= Unimplemented or Reserved
Figure 12-15. Timer System Control Register 2 (TSCR2)
Table 12-11. TSCR2 Field Descriptions
Field Description
7
TOI
Timer Overflow Interrupt Enable
0 Interrupt inhibited.
1 Hardware interrupt requested when TOF flag set.
2:0
PR[2:0]
Timer Prescaler Select — These three bits select the frequency of the timer prescaler clock derived from the
Bus Clock as shown in Table 12-12.
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 461
NOTE
The newly selected prescale factor will not take effect until the next
synchronized edge where all prescale counter stages equal zero.
12.3.2.10 Main Timer Interrupt Flag 1 (TFLG1)
Read: Anytime
W rite: Used in the clearing mechanism (set bits cause corresponding bits to be cleared). Writing a zero will
not affect current status of the bit.
Table 12-12. Timer Clock Selection
PR2 PR1 PR0 Timer Clock
0 0 0 Bus Clock / 1
0 0 1 Bus Clock / 2
0 1 0 Bus Clock / 4
0 1 1 Bus Clock / 8
1 0 0 Bus Clock / 16
1 0 1 Bus Clock / 32
1 1 0 Bus Clock / 64
1 1 1 Bus Clock / 128
Module Base + 0x000E
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED C1F C0F
W
Reset00000000
Figure 12-16. Main Timer Interrupt Flag 1 (TFLG1)
Table 12-13. TRLG1 Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
1:0
C[1:0]F
Input Capture/Output Compare Channel “x” Flag — These flags are set when an input capture or output
compare event occurs. Clearing requires writing a one to the corresponding flag bit while TEN is set to one.
Note: When TFFCA bit in TSCR register is set, a read from an input capture or a write into an output compare
channel (0x0010–0x001F) will cause the corresponding channel flag CxF to be cleared.
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
462 Freescale Semiconductor
12.3.2.11 Main Timer Interrupt Flag 2 (TFLG2)
TFLG2 indicates when interrupt conditions have occurred. To clear a bit in the flag register, write the bit
to one while TEN bit of TSCR1 .
Read: Anytime
Write: Used in clearing mechanism (set bits cause corresponding bits to be cleared).
Any access to TCNT will clear TFLG2 register if the TFFCA bit in TSCR register is set.
Module Base + 0x000F
76543210
R
TOF
0000000
W
Reset00000000
Unimplemented or Reserved
Figure 12-17. Main Timer Interrupt Flag 2 (TFLG2)
Table 12-14. TRLG2 Field Descriptions
Field Description
7
TOF
Timer Overflow Flag — Set when 16-bit free-running timer overflows from 0xFFFF to 0x0000. Clearing this bit
requires writing a one to bit 7 of TFLG2 register while the TEN bit of TSCR1 is set to one .
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 463
12.3.2.12 Timer Input Capture/Output Compare Registers High and Low 0–
1(TCxH and TCxL)
1This register is available only when the corresponding channel exists and is reserved if that channel does not exist. Writes to
a reserved register have no functional effect. Reads from a reserved register return zeroes.
Depending on the TIOS bit for the corresponding channel, these registers are used to latch the value of the
free-running counter when a defined transition is sensed by the corresponding input capture edge detector
or to trigger an output action for output compare.
Read: Anytime
Write: Anytime for output compare function.Writes to these registers have no meaning or effect during
input capture. All timer input capture/output compare registers are reset to 0x0000.
NOTE
Read/W rite access in byte mode for high byte should take place before low
byte otherwise it will give a different result.
Module Base + 0x0010 = TC0H
0x0012 = TC1H
0x0014=RESERVD
0x0016=RESERVD
0x0018=RESERVD
0x001A=RESERVD
0x001C=RESERVD
0x001E=RESERVD
15 14 13 12 11 10 9 0
R
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
Reset00000000
Figure 12-18. Timer Input Capture/Output Compare Register x High (TCxH)
Module Base + 0x0011 = TC0L
0x0013 = TC1L
0x0015 =RESERVD
0x0017=RESERVD
0x0019 =RESERVD
0x001B=RESERVD
0x001D=RESERVD
0x001F=RESERVD
76 543210
R
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
W
Reset00000000
Figure 12-19. Timer Input Capture/Output Compare Register x Low (TCxL)
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
464 Freescale Semiconductor
12.3.2.13 Output Compare Pin Disconnect Register(OCPD)
Read: Anytime
Write: Anytime
All bits reset to zero.
12.3.2.14 Precision Timer Prescaler Select Register (PTPSR)
Read: Anytime
Write: Anytime
All bits reset to zero.
Module Base + 0x002C
76543210
R
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED OCPD1 OCPD0
W
Reset00000000
Figure 12-20. Output Compare Pin Disconnect Register (OCPD)
Table 12-15. OCPD Field Description
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field Description
1:0
OCPD[1:0]
Output Compare Pin Disconnect Bits
0 Enables the timer channel port. Output Compare action will occur on the channel pin. These bits do not affect
the input capture .
1 Disables the timer channel port. Output Compare action will not occur on the channel pin, but the output
compare flag still become set.
Module Base + 0x002E
76543210
R
PTPS7 PTPS6 PTPS5 PTPS4 PTPS3 PTPS2 PTPS1 PTPS0
W
Reset00000000
Figure 12-21. Precision Timer Prescaler Select Register (PTPSR)
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 465
...
The Prescaler can be calculated as follows depending on logical value of the PTPS[7:0] and PRNT bit:
PRNT = 1 : Prescaler = PTPS[7:0] + 1
Table 12-17. Precision Timer Prescaler Selection Examples when PRNT = 1
12.4 Functional Description
This section provides a complete functional description of the timer TIM16B2CV3 block. Please refer to
the detailed timer block diagram in Figure 12-22 as necessary.
Table 12-16. PTPSR Field Descriptions
Field Description
7:0
PTPS[7:0]
Precision Timer Prescaler Select Bits These eight bits specify the division rate of the main Timer prescaler.
These are effective only when the PRNT bit of TSCR1 is set to 1. Table 12-17 shows some selection examples
in this case.
The newly selected prescale factor will not take effect until the next synchronized edge where all prescale counter
stages equal zero.
PTPS7 PTPS6 PTPS5 PTPS4 PTPS3 PTPS2 PTPS1 PTPS0 Prescale
Factor
00000000 1
00000001 2
00000010 3
00000011 4
-------- -
-------- -
-------- -
00010011 20
00010100 21
00010101 22
-------- -
-------- -
-------- -
11111100 253
11111101 254
11111110 255
11111111 256
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
466 Freescale Semiconductor
Figure 12-22. Detailed Timer Block Diagram
12.4.1 Prescaler
The prescaler divides the Bus clock by 1, 2, 4, 8, 16, 32, 64 or 128. The prescaler select bits, PR[2:0], select
the prescaler divisor. PR[2:0] are in timer system control register 2 (TSCR2).
The prescaler divides the Bus clock by a prescalar value. Prescaler select bits PR[2:0] of in timer system
control register 2 (TSCR2) are set to define a prescalar value that generates a divide by 1, 2, 4, 8, 16, 32,
64 and 128 when the PRNT bit in TSCR1 is disabled.
PRESCALER
CHANNEL 0
IOC0 PIN
16-BIT COUNTER
LOGIC
PR[2:1:0]
TC0
16-BIT COMPARATOR
TCNT(hi):TCNT(lo)
CHANNEL 1
TC1
16-BIT COMPARATOR
INTERRUPT
LOGIC
TOF
TOI
C0F
C1F
EDGE
DETECT
IOC1 PIN
LOGIC
EDGE
DETECT
CxF
CHANNELn-1
TCn-1
16-BIT COMPARATOR Cn-1F
IOCn-1 PIN
LOGIC
EDGE
DETECT
OM:OL0
TOV0
OM:OL1
TOV1
OM:OLn-1
TOVn-1
EDG1A EDG1B
EDG(n-1)A
EDG(n-1)B
EDG0B
CxI
CH. n-1COMPARE
CH.n-1 CAPTURE
CH. 1 CAPTURE
IOC1 PIN
IOC0 PIN
IOCn-1 PIN
TE
CH. 1 COMPARE
CH. 0COMPARE
CH. 0 CAPTURE
CHANNEL2
EDG0A
IOC0
IOC1
IOCn-1
TOF
C0F
C1F
Cn-1F
MUX
PRE-PRESCALER
PTPSR[7:0]
tim source Clock
1
0
PRNT
n is channels number.
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 467
By enabling the PRNT bit of the TSCR1 register, the performance of the timer can be enhanced. In this
case, it is possible to set additional prescaler settings for the main timer counter in the present timer by
using PTPSR[7:0] bits of PTPSR register generating divide by 1, 2, 3, 4,....20, 21, 22, 23,......255, or 256.
12.4.2 Input Capture
Clearing the I/O (input/output) select bit, IOSx, configures channel x as an input capture channel. The
input capture function captures the time at which an external event occurs. When an active edge occurs on
the pin of an input capture channel, the timer transfers the value in the timer counter into the timer channel
registers, TCx.
The minimum pulse width for the input capture input is greater than two Bus clocks.
An input capture on channel x sets the CxF flag. The CxI bit enables the CxF flag to generate interrupt
requests. T imer module must stay enabled (TEN bit of TSCR1 register must be set to one) while clearing
CxF (writing one to CxF).
12.4.3 Output Compare
Setting the I/O select bit, IOSx, configures channel x when available as an output compare channel. The
output compare function can generate a periodic pulse with a programmable polarity, duration, and
frequency . When the timer counter reaches the value in the channel registers of an output compare channel,
the timer can set, clear, or toggle the channel pin if the corresponding OCPDx bit is set to zero. An output
compare on channel x sets the CxF flag. The CxI bit enables the CxF flag to generate interrupt requests.
Timer module must stay enabled (TEN bit of TSCR1 register must be set to one) while clearing CxF
(writing one to CxF).
The output mode and level bits, OMx and OLx, select set, clear, toggle on output compare. Clearing both
OMx and OLx results in no output compare action on the output compare channel pin.
Setting a force output compare bit, FOCx, causes an output compare on channel x. A forced output
compare does not set the channel flag.
Writing to the timer port bit of an output compare pin does not affect the pin state. The value written is
stored in an internal latch. W h en the pin becomes available for general-purpose output, the last value
written to the bit appears at the pin.
12.4.3.1 OC Channel Initialization
The internal register whose output drives OCx can be programmed before the timer drives OCx. The
desired state can be programmed to this internal register by writing a one to CFORCx bit with TIOSx,
OCPDx and TEN bits set to one.
Set OCx: Write a 1 to FOCx while TEN=1, IOSx=1, OMx=1, OLx=1 and OCPDx=1
Clear OCx: Write a 1 to FOCx while TEN=1, IOSx=1, OMx=1, OLx=0 and OCPDx=1
Chapter 12 Timer Module (TIM16B2CV3) Block Description
MC9S12ZVM Family Reference Manual Rev. 2.2
468 Freescale Semiconductor
Setting OCPDx to zero allows the internal register to drive the programmed state to OCx. This allows a
glitch free switch over of port from general purpose I/O to timer output once the OCPDx bit is set to zero.
12.5 Resets
The reset state of each individual bit is listed within Section 12.3, “Memory Map and Register Definition”
which details the registers and their bit fields
12.6 Interrupts
This section describes interrupts originated by the TIM16B2CV3 block. Table 12-18 lists the interrupts
generated by the TIM16B2CV3 to communicate with the MCU.
The TIM16B2CV3 could use up to 3 interrupt vectors. The interrupt vector of fsets and interrupt numbers
are chip dependent.
12.6.1 Channel [1:0] Interrupt (C[1:0]F)
This active high outputs will be asserted by the module to request a timer channel 7 – 0 interrupt. The TIM
block only generates the interrupt and does not service it. Only bits related to implemented channels are
valid.
12.6.2 Timer Overflow Interrupt (TOF)
This active high output will be asserted by the module to request a timer overflow interrupt. The TIM block
only generates the interrupt and does not service it.
Table 12-18. TIM16B2CV3 Interrupts
Interrupt Offset Vector Priority Source Description
C[1:0]F Timer Channel 1–0 Active high timer channel interrupts 1–0
TOF Timer Overflow Timer Overflow interrupt
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 469
Chapter 13
Freescale’s Scalable Controller Area Network
(S12MSCANV3)
13.1 Introduction
Freescale’s scalable controller area network (S12MSCANV3) definition is based on the MSCAN12
definition, which is the specific implementation of the MSCAN concept targeted for the S12, S12X and
S12Z microcontroller families.
The module is a communication controller implementing the CAN 2.0A/B protocol as defined in the
Bosch specification dated September 1991. For users to fully understand the MSCAN specification, it is
recommended that the Bosch specification be read first to familiarize the reader with the terms and
concepts contained within this document.
Though not exclusively intended for automotive applications, CAN protocol is designed to meet the
specific requirements of a vehicle serial data bus: real-time processing, reliable operation in the EMI
environment of a vehicle, cost-effectiveness, and required bandwidth.
MSCAN uses an advanced buffer arrangement resulting in predictable real-time behavior and simplified
application software.
Revision History
Revision
Number Revision Date Sections
Affected Description of Changes
V03.14 12 Nov 2012 Table 13-10 Corrected RxWRN and TxWRN threshold values
V03.15 12 Jan 2013 Table 13-2
Table 13-25
Figure 13-37
13.1/13-469
13.3.2.15/13-
491
Updated TIME bit description
Added register names to buffer map
Updated TSRH and TSRL read conditions
Updated introduction
Updated CANTXERR and CANRXERR register notes
V03.16 08 Aug 2013 Corrected typos
Chapter 13 Freescale’s Scalable Controller Area Network (S12MSCANV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
470 Freescale Semiconductor
13.1.1 Glossary
13.1.2 Block Diagram
Figure 13-1. MSCAN Block Diagram
Table 13-1. Terminology
ACK Acknowledge of CAN message
CAN Controller Area Network
CRC Cyclic Redundancy Code
EOF End of Frame
FIFO First-In-First-Out Memory
IFS Inter-Frame Sequence
SOF Start of Frame
CPU bus CPU related read/write data bus
CAN bus CAN protocol related serial bus
oscillator clock Direct clock from external oscillator
bus clock CPU bus related clock
CAN clock CAN protocol related clock
RXCAN
TXCAN
Receive/
Transmit
Engine
Message
Filtering
and
Buffering
Control
and
Status
Wake-Up Interrupt Req.
Errors Interrupt Req.
Receive Interrupt Req.
Transmit Interrupt Req.
CANCLK
Bus Clock
Configuration
Oscillator Clock
MUX Presc.
Tq Clk
MSCAN
Low Pass Filter
Wake-Up
Registers
Chapter 13 Freescale’s Scalable Controller Area Network (S12MSCANV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 471
13.1.3 Features
The basic features of the MSCAN are as follows:
Implementation of the CAN protocol — Version 2.0A/B
Standard and extended data frames
Zero to eight bytes data length
Programmable bit rate up to 1 Mbps1
Support for remote frames
Five receive buffers with FIFO storage scheme
Three transmit buffers with internal prioritization using a “local priority” concept
Flexible maskable identifier filter supports two full-size (32-bit) extended identifier filters, or four
16-bit filters, or eight 8-bit filters
Programmable wake-up functionality with integrated low-pass filter
Programmable loopback mode supports self-test operation
Programmable listen-only mode for monitoring of CAN bus
Programmable bus-off recovery functionality
Separate signalling and interrupt capabilities for all CAN receiver and transmitter error states
(warning, error passive, bus-off)
Programmable MSCAN clock source either bus clock or oscillator clock
Internal timer for time-stamping of received and transmitted messages
Three low-power modes: sleep, power down, and MSCAN enable
Global initialization of configuration registers
13.1.4 Modes of Operation
For a description of the specific MSCAN modes and the module operation related to the system operating
modes refer to Section 13.4.4, “Modes of Operation”.
1. Depending on the actual bit timing and the clock jitter of the PLL.
Chapter 13 Freescale’s Scalable Controller Area Network (S12MSCANV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
472 Freescale Semiconductor
13.2 External Signal Description
The MSCAN uses two external pins.
NOTE
On MCUs with an integrated CAN physical interface (transceiver) the
MSCAN interface is connected internally to the transceiver interface. In
these cases the external availability of signals TXCAN and RXCAN is
optional.
13.2.1 RXCAN — CAN Receiver Input Pin
RXCAN is the MSCAN receiver input pin.
13.2.2 TXCAN — CAN Transmitter Output Pin
TXCAN is the MSCAN transmitter output pin. The TXCAN output pin represents the logic level on the
CAN bus:
0 = Dominant state
1 = Recessive state
13.2.3 CAN System
A typical CAN system with MSCAN is shown in Figure 13-2. Each CAN station is connected physically
to the CAN bus lines through a transceiver device. The transceiver is capable of driving the large current
needed for the CAN bus and has current protection against defective CAN or defective stations.
Figure 13-2. CAN System
CAN Bus
CAN Controller
(MSCAN)
Transceiver
CAN node 1
CAN node 2
CAN node n
CANL
CANH
MCU
TXCAN RXCAN
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13.3 Memory Map and Register Definition
This section provides a detailed description of all registers accessible in the MSCAN.
13.3.1 Module Memory Map
Figure 13-3 gives an overview on all registers and their ind ividual bits in the MSCAN memo ry map. The
register address results from the addition of base address and address offset. The base address is
determined at the MCU level and can be found in the MCU memory map description. The addr ess offset
is defined at the module level.
The MSCAN occupies 64 bytes in the memory space. The base address of the MSCAN module is
determined at the MCU level when the MCU is defined. The register decode map is fixed and begins at
the first address of the module address offset.
The detailed register descriptions follow in the order they appear in the register map.
Chapter 13 Freescale’s Scalable Controller Area Network (S12MSCANV3)
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Register
Name Bit 7654321Bit 0
0x0000
CANCTL0
RRXFRM RXACT CSWAI SYNCH TIME WUPE SLPRQ INITRQ
W
0x0001
CANCTL1
RCANE CLKSRC LOOPB LISTEN BORM WUPM SLPAK INITAK
W
0x0002
CANBTR0
RSJW1 SJW0 BRP5 BRP4 BRP3 BRP2 BRP1 BRP0
W
0x0003
CANBTR1
RSAMP TSEG22 TSEG21 TSEG20 TSEG13 TSEG12 TSEG11 TSEG10
W
0x0004
CANRFLG
RWUPIF CSCIF RSTAT1 RSTAT0 TSTAT1 TSTAT0 OVRIF RXF
W
0x0005
CANRIER
RWUPIE CSCIE RSTATE1 RSTATE0 TSTATE1 TSTATE0 OVRIE RXFIE
W
0x0006
CANTFLG
R0 0000
TXE2 TXE1 TXE0
W
0x0007
CANTIER
R00000
TXEIE2 TXEIE1 TXEIE0
W
0x0008
CANTARQ
R00000
ABTRQ2 ABTRQ1 ABTRQ0
W
0x0009
CANTAAK
R00000ABTAK2 ABTAK1 ABTAK0
W
0x000A
CANTBSEL
R00000
TX2 TX1 TX0
W
0x000B
CANIDAC
R0 0 IDAM1 IDAM0 0 IDHIT2 IDHIT1 IDHIT0
W
0x000C
Reserved
R00000000
W
0x000D
CANMISC
R0000000
BOHOLD
W
= Unimplemented or Reserved
Figure 13-3. MSCAN Register Summary
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13.3.2 Register Descriptions
This section describes in detail all the registers and register bits in the MSCAN module. Each description
includes a standard register diagram with an associated figure number. Details of register bit and field
function follow the register diagrams, in bit order. All bits of all registers in this module are completely
synchronous to internal clocks during a register read.
0x000E
CANRXERR
R RXERR7 RXERR6 RXERR5 RXERR4 RXERR3 RXERR2 RXERR1 RXERR0
W
0x000F
CANTXERR
R TXERR7 TXERR6 TXERR5 TXERR4 TXERR3 TXERR2 TXERR1 TXERR0
W
0x0010–0x0013
CANIDAR0–3
RAC7AC6AC5AC4AC3AC2AC1AC0
W
0x0014–0x0017
CANIDMRx
RAM7 AM6 AM5 AM4 AM3 AM2 AM1 AM0
W
0x0018–0x001B
CANIDAR4–7
RAC7AC6AC5AC4AC3AC2AC1AC0
W
0x001C–0x001F
CANIDMR4–7
RAM7 AM6 AM5 AM4 AM3 AM2 AM1 AM0
W
0x0020–0x002F
CANRXFG
RSee Section 13.3.3, “Programmer’s Model of Message Storage
W
0x0030–0x003F
CANTXFG
RSee Section 13.3.3, “Programmer’s Model of Message Storage
W
Register
Name Bit 7654321Bit 0
= Unimplemented or Reserved
Figure 13-3. MSCAN Register Summary (continued)
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13.3.2.1 MSCAN Control Register 0 (CANCTL0)
The CANCTL0 register provides various control bits of the MSCAN module as described below.
NOTE
The CANCTL0 register, except WUPE, INITRQ, and SLPRQ, is held in the
reset state when the initialization mode is active (INITRQ = 1 and
INITAK = 1). This register is writable again as soon as the initialization
mode is exited (INITRQ = 0 and INITAK = 0).
Module Base + 0x0000 Access: User read/write(1)
1. Read: Anytime
Write: Anytime when out of initialization mode; exceptions are read-only RXACT and SYNCH, RXFRM (which is set by the
module only), and INITRQ (which is also writable in initialization mode)
76543210
R
RXFRM
RXACT
CSWAI
SYNCH
TIME WUPE SLPRQ INITRQ
W
Reset:00000001
= Unimplemented
Figure 13-4. MSCAN Control Register 0 (CANCTL0)
Table 13-2. CANCTL0 Register Field Descriptions
Field Description
7
RXFRM
Received Frame FlagThis bit is read and clear only. It is set when a receiver has received a valid message
correctly, independently of the filter configuration. After it is set, it remains set until cleared by software or reset.
Clearing is done by writing a 1. Writing a 0 is ignored. This bit is not valid in loopback mode.
0 No valid message was received since last clearing this flag
1 A valid message was received since last clearing of this flag
6
RXACT
Receiver Active Status — This read-only flag indicates the MSCAN is receiving a message(1). The flag is
controlled by the receiver front end. This bit is not valid in loopback mode.
0 MSCAN is transmitting or idle
1 MSCAN is receiving a message (including when arbitration is lost)
5
CSWAI(2) CAN Stops in Wait Mode — Enabling this bit allows for lower power consumption in wait mode by disabling all
the clocks at the CPU bus interface to the MSCAN module.
0 The module is not affected during wait mode
1 The module ceases to be clocked during wait mode
4
SYNCH
Synchronized Status — This read-only flag indicates whether the MSCAN is synchronized to the CAN bus and
able to participate in the communication process. It is set and cleared by the MSCAN.
0 MSCAN is not synchronized to the CAN bus
1 MSCAN is synchronized to the CAN bus
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3
TIME
Timer Enable This bit activates an internal 16-bit wide free running timer which is clocked by the bit clock rate.
If the timer is enabled, a 16-bit time stamp will be assigned to each transmitted/received message within the
active TX/RX buffer. Right after the EOF of a valid message on the CAN bus, the time stamp is written to the
highest bytes (0x000E, 0x000F) in the appropriate buffer (see Section 13.3.3, “Programmer’s Model of Message
Storage”). In loopback mode no receive timestamp is generated. The internal timer is reset (all bits set to 0) when
disabled. This bit is held low in initialization mode.
0 Disable internal MSCAN timer
1 Enable internal MSCAN timer
2
WUPE(3) Wake-Up Enable — This configuration bit allows the MSCAN to restart from sleep mode or from power down
mode (entered from sleep) when traffic on CAN is detected (see Section 13.4.5.5, “MSCAN Sleep Mode”). This
bit must be configured before sleep mode entry for the selected function to take effect.
0 Wake-up disabled — The MSCAN ignores traffic on CAN
1 Wake-up enabled — The MSCAN is able to restart
1
SLPRQ(4) Sleep Mode Request — This bit requests the MSCAN to enter sleep mode, which is an internal power saving
mode (see Section 13.4.5.5, “MSCAN Sleep Mode”). The sleep mode request is serviced when the CAN bus is
idle, i.e., the module is not receiving a message and all transmit buffers are empty. The module indicates entry
to sleep mode by setting SLPAK = 1 (see Section 13.3.2.2, “MSCAN Control Register 1 (CANCTL1)”). SLPRQ
cannot be set while the WUPIF flag is set (see Section 13.3.2.5, “MSCAN Receiver Flag Register (CANRFLG)”).
Sleep mode will be active until SLPRQ is cleared by the CPU or, depending on the setting of WUPE, the MSCAN
detects activity on the CAN bus and clears SLPRQ itself.
0 Running — The MSCAN functions normally
1 Sleep mode request — The MSCAN enters sleep mode when CAN bus idle
0
INITRQ(5),(6) Initialization Mode Request — When this bit is set by the CPU, the MSCAN skips to initialization mode (see
Section 13.4.4.5, “MSCAN Initialization Mode”). Any ongoing transmission or reception is aborted and
synchronization to the CAN bus is lost. The module indicates entry to initialization mode by setting INITAK = 1
(Section 13.3.2.2, “MSCAN Control Register 1 (CANCTL1)”).
The following registers enter their hard reset state and restore their default values: CANCTL0(7), CANRFLG(8),
CANRIER(9), CANTFLG, CANTIER, CANTARQ, CANTAAK, and CANTBSEL.
The registers CANCTL1, CANBTR0, CANBTR1, CANIDAC, CANIDAR0-7, and CANIDMR0-7 can only be
written by the CPU when the MSCAN is in initialization mode (INITRQ = 1 and INITAK = 1). The values of the
error counters are not affected by initialization mode.
When this bit is cleared by the CPU, the MSCAN restarts and then tries to synchronize to the CAN bus. If the
MSCAN is not in bus-off state, it synchronizes after 11 consecutive recessive bits on the CAN bus; if the MSCAN
is in bus-off state, it continues to wait for 128 occurrences of 11 consecutive recessive bits.
Writing to other bits in CANCTL0, CANRFLG, CANRIER, CANTFLG, or CANTIER must be done only after
initialization mode is exited, which is INITRQ = 0 and INITAK = 0.
0 Normal operation
1 MSCAN in initialization mode
1. See the Bosch CAN 2.0A/B specification for a detailed definition of transmitter and receiver states.
2. In order to protect from accidentally violating the CAN protocol, TXCAN is immediately forced to a recessive state when the
CPU enters wait (CSWAI = 1) or stop mode (see Section 13.4.5.2, “Operation in Wait Mode” and Section 13.4.5.3, “Operation
in Stop Mode”).
3. The CPU has to make sure that the WUPE register and the WUPIE wake-up interrupt enable register (see Section 13.3.2.6,
“MSCAN Receiver Interrupt Enable Register (CANRIER)) is enabled, if the recovery mechanism from stop or wait is required.
4. The CPU cannot clear SLPRQ before the MSCAN has entered sleep mode (SLPRQ = 1 and SLPAK = 1).
5. The CPU cannot clear INITRQ before the MSCAN has entered initialization mode (INITRQ = 1 and INITAK = 1).
Table 13-2. CANCTL0 Register Field Descriptions (continued)
Field Description
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13.3.2.2 MSCAN Control Register 1 (CANCTL1)
The CANCTL1 register provides various control bits and handshake status information of the MSCAN
module as described below.
6. In order to protect from accidentally violating the CAN protocol, TXCAN is immediately forced to a recessive state when the
initialization mode is requested by the CPU. Thus, the recommended procedure is to bring the MSCAN into sleep mode
(SLPRQ = 1 and SLPAK = 1) before requesting initialization mode.
7. Not including WUPE, INITRQ, and SLPRQ.
8. TSTAT1 and TSTAT0 are not affected by initialization mode.
9. RSTAT1 and RSTAT0 are not affected by initialization mode.
Module Base + 0x0001 Access: User read/write(1)
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1), except CANE which is write once in normal and anytime in
special system operation modes when the MSCAN is in initialization mode (INITRQ = 1 and INITAK = 1)
76543210
R
CANE CLKSRC LOOPB LISTEN BORM WUPM
SLPAK INITAK
W
Reset:00010001
= Unimplemented
Figure 13-5. MSCAN Control Register 1 (CANCTL1)
Table 13-3. CANCTL1 Register Field Descriptions
Field Description
7
CANE
MSCAN Enable
0 MSCAN module is disabled
1 MSCAN module is enabled
6
CLKSRC
MSCAN Clock Source This bit defines the clock source for the MSCAN module (only for systems with a clock
generation module; Section 13.4.3.2, “Clock System,” and Section Figure 13-43., “MSCAN Clocking Scheme,”).
0 MSCAN clock source is the oscillator clock
1 MSCAN clock source is the bus clock
5
LOOPB
Loopback Self Test ModeWhen this bit is set, the MSCAN performs an internal loopback which can be used
for self test operation. The bit stream output of the transmitter is fed back to the receiver internally. The RXCAN
input is ignored and the TXCAN output goes to the recessive state (logic 1). The MSCAN behaves as it does
normally when transmitting and treats its own transmitted message as a message received from a remote node.
In this state, the MSCAN ignores the bit sent during the ACK slot in the CAN frame acknowledge field to ensure
proper reception of its own message. Both transmit and receive interrupts are generated.
0 Loopback self test disabled
1 Loopback self test enabled
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13.3.2.3 MSCAN Bus Timing Register 0 (CANBTR0)
The CANBTR0 register configures various CAN bus timing parameters of the MSCAN module.
4
LISTEN
Listen Only ModeThis bit configures the MSCAN as a CAN bus monitor. When LISTEN is set, all valid CAN
messages with matching ID are received, but no acknowledgement or error frames are sent out (see
Section 13.4.4.4, “Listen-Only Mode”). In addition, the error counters are frozen. Listen only mode supports
applications which require “hot plugging” or throughput analysis. The MSCAN is unable to transmit any
messages when listen only mode is active.
0 Normal operation
1 Listen only mode activated
3
BORM
Bus-Off Recovery Mode — This bit configures the bus-off state recovery mode of the MSCAN. Refer to
Section 13.5.2, “Bus-Off Recovery,” for details.
0 Automatic bus-off recovery (see Bosch CAN 2.0A/B protocol specification)
1 Bus-off recovery upon user request
2
WUPM
Wake-Up Mode — If WUPE in CANCTL0 is enabled, this bit defines whether the integrated low-pass filter is
applied to protect the MSCAN from spurious wake-up (see Section 13.4.5.5, “MSCAN Sleep Mode”).
0 MSCAN wakes up on any dominant level on the CAN bus
1 MSCAN wakes up only in case of a dominant pulse on the CAN bus that has a length of Twup
1
SLPAK
Sleep Mode AcknowledgeThis flag indicates whether the MSCAN module has entered sleep mode (see
Section 13.4.5.5, “MSCAN Sleep Mode”). It is used as a handshake flag for the SLPRQ sleep mode request.
Sleep mode is active when SLPRQ = 1 and SLPAK = 1. Depending on the setting of WUPE, the MSCAN will
clear the flag if it detects activity on the CAN bus while in sleep mode.
0 Running — The MSCAN operates normally
1 Sleep mode active — The MSCAN has entered sleep mode
0
INITAK
Initialization Mode Acknowledge — This flag indicates whether the MSCAN module is in initialization mode
(see Section 13.4.4.5, “MSCAN Initialization Mode”). It is used as a handshake flag for the INITRQ initialization
mode request. Initialization mode is active when INITRQ = 1 and INITAK = 1. The registers CANCTL1,
CANBTR0, CANBTR1, CANIDAC, CANIDAR0–CANIDAR7, and CANIDMR0–CANIDMR7 can be written only by
the CPU when the MSCAN is in initialization mode.
0 Running — The MSCAN operates normally
1 Initialization mode active — The MSCAN has entered initialization mode
Module Base + 0x0002 Access: User read/write(1)
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
76543210
R
SJW1 SJW0 BRP5 BRP4 BRP3 BRP2 BRP1 BRP0
W
Reset:00000000
Figure 13-6. MSCAN Bus Timing Register 0 (CANBTR0)
Table 13-3. CANCTL1 Register Field Descriptions (continued)
Field Description
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13.3.2.4 MSCAN Bus Timing Register 1 (CANBTR1)
The CANBTR1 register configures various CAN bus timing parameters of the MSCAN module.
Table 13-4. CANBTR0 Register Field Descriptions
Field Description
7-6
SJW[1:0]
Synchronization Jump Width The synchronization jump width defines the maximum number of time quanta
(Tq) clock cycles a bit can be shortened or lengthened to achieve resynchronization to data transitions on the
CAN bus (see Table 13-5).
5-0
BRP[5:0]
Baud Rate Prescaler These bits determine the time quanta (Tq) clock which is used to build up the bit timing
(see Table 13-6).
Table 13-5. Synchronization Jump Width
SJW1 SJW0 Synchronization Jump Width
0 0 1 Tq clock cycle
0 1 2 Tq clock cycles
1 0 3 Tq clock cycles
1 1 4 Tq clock cycles
Table 13-6. Baud Rate Prescaler
BRP5 BRP4 BRP3 BRP2 BRP1 BRP0 Prescaler value (P)
000000 1
000001 2
000010 3
000011 4
:::::: :
111111 64
Module Base + 0x0003 Access: User read/write(1)
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
76543210
R
SAMP TSEG22 TSEG21 TSEG20 TSEG13 TSEG12 TSEG11 TSEG10
W
Reset:00000000
Figure 13-7. MSCAN Bus Timing Register 1 (CANBTR1)
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The bit time is determined by the oscillator frequency, the baud rate prescaler, and the number of time
quanta (Tq) clock cycles per bit (as shown in Table 13-8 and Table 13-9).
Table 13-7. CANBTR1 Register Field Descriptions
Field Description
7
SAMP
Sampling — This bit determines the number of CAN bus samples taken per bit time.
0 One sample per bit.
1 Three samples per bit(1).
If SAMP = 0, the resulting bit value is equal to the value of the single bit positioned at the sample point. If
SAMP = 1, the resulting bit value is determined by using majority rule on the three total samples. For higher bit
rates, it is recommended that only one sample is taken per bit time (SAMP = 0).
1. In this case, PHASE_SEG1 must be at least 2 time quanta (Tq).
6-4
TSEG2[2:0]
Time Segment 2 Time segments within the bit time fix the number of clock cycles per bit time and the location
of the sample point (see Figure 13-44). Time segment 2 (TSEG2) values are programmable as shown in
Table 13-8.
3-0
TSEG1[3:0]
Time Segment 1 Time segments within the bit time fix the number of clock cycles per bit time and the location
of the sample point (see Figure 13-44). Time segment 1 (TSEG1) values are programmable as shown in
Table 13-9.
Table 13-8. Time Segment 2 Values
TSEG22 TSEG21 TSEG20 Time Segment 2
0 0 0 1 Tq clock cycle(1)
1. This setting is not valid. Please refer to Table 13-36 for valid settings.
0 0 1 2 Tq clock cycles
::: :
1 1 0 7 Tq clock cycles
1 1 1 8 Tq clock cycles
Table 13-9. Time Segment 1 Values
TSEG13 TSEG12 TSEG11 TSEG10 Time segment 1
0 0 0 0 1 Tq clock cycle(1)
1. This setting is not valid. Please refer to Table 13-36 for valid settings.
0 0 0 1 2 Tq clock cycles1
0 0 1 0 3 Tq clock cycles1
0 0 1 1 4 Tq clock cycles
:::: :
1 1 1 0 15 Tq clock cycles
1 1 1 1 16 Tq clock cycles
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Eqn. 13-1
13.3.2.5 MSCAN Receiver Flag Register (CANRFLG)
A flag can be cleared only by software (writing a 1 to the corresponding bit position) when the condition
which caused the setting is no longer valid. Every flag has an associated interrupt enable bit in the
CANRIER register.
NOTE
The CANRFLG register is held in the reset state1 when the initialization
mode is active (INITRQ = 1 and INITAK = 1). This register is writable
again as soon as the initialization mode is exited (INITRQ = 0 and INITAK
= 0).
Module Base + 0x0004 Access: User read/write(1)
1. Read: Anytime
Write: Anytime when not in initialization mode, except RSTAT[1:0] and TSTAT[1:0] flags which are read-only; write of 1 clears
flag; write of 0 is ignored
76543210
R
WUPIF CSCIF
RSTAT1 RSTAT0 TSTAT1 TSTAT0
OVRIF RXF
W
Reset:00000000
= Unimplemented
Figure 13-8. MSCAN Receiver Flag Register (CANRFLG)
1. The RSTAT[1:0], TSTAT[1:0] bits are not affected by initialization mode.
Bit Time Prescaler valueÞ
fCANCLK
---------------------------------------------------------- 1 TimeSegment1 TimeSegment2++=Þ
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Table 13-10. CANRFLG Register Field Descriptions
Field Description
7
WUPIF
Wake-Up Interrupt Flag — If the MSCAN detects CAN bus activity while in sleep mode (see Section 13.4.5.5,
“MSCAN Sleep Mode,”) and WUPE = 1 in CANTCTL0 (see Section 13.3.2.1, “MSCAN Control Register 0
(CANCTL0)”), the module will set WUPIF. If not masked, a wake-up interrupt is pending while this flag is set.
0 No wake-up activity observed while in sleep mode
1 MSCAN detected activity on the CAN bus and requested wake-up
6
CSCIF
CAN Status Change Interrupt Flag — This flag is set when the MSCAN changes its current CAN bus status
due to the actual value of the transmit error counter (TEC) and the receive error counter (REC). An additional 4-
bit (RSTAT[1:0], TSTAT[1:0]) status register, which is split into separate sections for TEC/REC, informs the
system on the actual CAN bus status (see Section 13.3.2.6, “MSCAN Receiver Interrupt Enable Register
(CANRIER)”). If not masked, an error interrupt is pending while this flag is set. CSCIF provides a blocking
interrupt. That guarantees that the receiver/transmitter status bits (RSTAT/TSTAT) are only updated when no
CAN status change interrupt is pending. If the TECs/RECs change their current value after the CSCIF is
asserted, which would cause an additional state change in the RSTAT/TSTAT bits, these bits keep their status
until the current CSCIF interrupt is cleared again.
0 No change in CAN bus status occurred since last interrupt
1 MSCAN changed current CAN bus status
5-4
RSTAT[1:0]
Receiver Status Bits — The values of the error counters control the actual CAN bus status of the MSCAN. As
soon as the status change interrupt flag (CSCIF) is set, these bits indicate the appropriate receiver related CAN
bus status of the MSCAN. The coding for the bits RSTAT1, RSTAT0 is:
00 RxOK: 0 receive error counter 96
01 RxWRN: 96 receive error counter 128
10 RxERR: 1 28 receive error counter
11 Bus-off(1): 256transmit error counter
1. Redundant Information for the most critical CAN bus status which is “bus-off”. This only occurs if the Tx error counter exceeds
a number of 255 errors. Bus-off affects the receiver state. As soon as the transmitter leaves its bus-off state the receiver state
skips to RxOK too. Refer also to TSTAT[1:0] coding in this register.
3-2
TSTAT[1:0]
Transmitter Status Bits — The values of the error counters control the actual CAN bus status of the MSCAN.
As soon as the status change interrupt flag (CSCIF) is set, these bits indicate the appropriate transmitter related
CAN bus status of the MSCAN. The coding for the bits TSTAT1, TSTAT0 is:
00 TxOK: 0 transmit error counter 96
01 TxWRN: 96 transmit error counter 128
10 TxERR: 1 28 transmit error counter 256
11 Bus-Off: 256 transmit error counter
1
OVRIF
Overrun Interrupt Flag This flag is set when a data overrun condition occurs. If not masked, an error interrupt
is pending while this flag is set.
0 No data overrun condition
1 A data overrun detected
0
RXF(2)
2. To ensure data integrity, do not read the receive buffer registers while the RXF flag is cleared. For MCUs with dual CPUs,
reading the receive buffer registers while the RXF flag is cleared may result in a CPU fault condition.
Receive Buffer Full Flag — RXF is set by the MSCAN when a new message is shifted in the receiver FIFO.
This flag indicates whether the shifted buffer is loaded with a correctly received message (matching identifier,
matching cyclic redundancy code (CRC) and no other errors detected). After the CPU has read that message
from the RxFG buffer in the receiver FIFO, the RXF flag must be cleared to release the buffer. A set RXF flag
prohibits the shifting of the next FIFO entry into the foreground buffer (RxFG). If not masked, a receive interrupt
is pending while this flag is set.
0 No new message available within the RxFG
1 The receiver FIFO is not empty. A new message is available in the RxFG
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13.3.2.6 MSCAN Receiver Interrupt Enable Register (CANRIER)
This register contains the interrupt enable bits for the interrupt flags described in the CANRFLG register.
NOTE
The CANRIER register is held in the reset state when the initialization mode
is active (INITRQ=1 and INITAK=1). This register is writable when not in
initialization mode (INITRQ=0 and INITAK=0).
The RSTATE[1:0], TSTATE[1:0] bits are not affected by initialization
mode.
Module Base + 0x0005 Access: User read/write(1)
1. Read: Anytime
Write: Anytime when not in initialization mode
76543210
R
WUPIE CSCIE RSTATE1 RSTATE0 TSTATE1 TSTATE0 OVRIE RXFIE
W
Reset:00000000
Figure 13-9. MSCAN Receiver Interrupt Enable Register (CANRIER)
Table 13-11. CANRIER Register Field Descriptions
Field Description
7
WUPIE(1) Wake-Up Interrupt Enable
0 No interrupt request is generated from this event.
1 A wake-up event causes a Wake-Up interrupt request.
6
CSCIE
CAN Status Change Interrupt Enable
0 No interrupt request is generated from this event.
1 A CAN Status Change event causes an error interrupt request.
5-4
RSTATE[1:0
]
Receiver Status Change Enable These RSTAT enable bits control the sensitivity level in which receiver state
changes are causing CSCIF interrupts. Independent of the chosen sensitivity level the RSTAT flags continue to
indicate the actual receiver state and are only updated if no CSCIF interrupt is pending.
00 Do not generate any CSCIF interrupt caused by receiver state changes.
01 Generate CSCIF interrupt only if the receiver enters or leaves “bus-off” state. Discard other receiver state
changes for generating CSCIF interrupt.
10 Generate CSCIF interrupt only if the receiver enters or leaves “RxErr” or “bus-off(2) state. Discard other
receiver state changes for generating CSCIF interrupt.
11 Generate CSCIF interrupt on all state changes.
3-2
TSTATE[1:0]
Transmitter Status Change Enable These TSTAT enable bits control the sensitivity level in which transmitter
state changes are causing CSCIF interrupts. Independent of the chosen sensitivity level, the TSTAT flags
continue to indicate the actual transmitter state and are only updated if no CSCIF interrupt is pending.
00 Do not generate any CSCIF interrupt caused by transmitter state changes.
01 Generate CSCIF interrupt only if the transmitter enters or leaves “bus-off” state. Discard other transmitter
state changes for generating CSCIF interrupt.
10 Generate CSCIF interrupt only if the transmitter enters or leaves “TxErr” or “bus-off” state. Discard other
transmitter state changes for generating CSCIF interrupt.
11 Generate CSCIF interrupt on all state changes.
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13.3.2.7 MSCAN Transmitter Flag Register (CANTFLG)
The transmit buffer empty flags each have an associated interrupt enable bit in the CANTIER register.
NOTE
The CANTFLG register is held in the reset state when the initialization
mode is active (INITRQ = 1 and INITAK = 1). This register is writable
when not in initialization mode (INITRQ = 0 and INITAK = 0).
1
OVRIE
Overrun Interrupt Enable
0 No interrupt request is generated from this event.
1 An overrun event causes an error interrupt request.
0
RXFIE
Receiver Full Interrupt Enable
0 No interrupt request is generated from this event.
1 A receive buffer full (successful message reception) event causes a receiver interrupt request.
1. WUPIE and WUPE (see Section 13.3.2.1, “MSCAN Control Register 0 (CANCTL0)”) must both be enabled if the recovery
mechanism from stop or wait is required.
2. Bus-off state is only defined for transmitters by the CAN standard (see Bosch CAN 2.0A/B protocol specification). Because the
only possible state change for the transmitter from bus-off to TxOK also forces the receiver to skip its current state to RxOK,
the coding of the RXSTAT[1:0] flags define an additional bus-off state for the receiver (see Section 13.3.2.5, “MSCAN Receiver
Flag Register (CANRFLG)”).
Module Base + 0x0006 Access: User read/write(1)
1. Read: Anytime
Write: Anytime when not in initialization mode; write of 1 clears flag, write of 0 is ignored
76543210
R0 0000
TXE2 TXE1 TXE0
W
Reset:00000111
= Unimplemented
Figure 13-10. MSCAN Transmitter Flag Register (CANTFLG)
Table 13-11. CANRIER Register Field Descriptions (continued)
Field Description
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13.3.2.8 MSCAN Transmitter Interrupt Enable Register (CANTIER)
This register contains the interrupt enable bits for the transmit buffer empty interrupt flags.
NOTE
The CANTIER register is held in the reset state when the initialization mode
is active (INITRQ = 1 and INITAK = 1). This register is writable when not
in initialization mode (INITRQ = 0 and INITAK = 0).
Table 13-12. CANTFLG Register Field Descriptions
Field Description
2-0
TXE[2:0]
Transmitter Buffer EmptyThis flag indicates that the associated transmit message buffer is empty, and thus
not scheduled for transmission. The CPU must clear the flag after a message is set up in the transmit buffer and
is due for transmission. The MSCAN sets the flag after the message is sent successfully. The flag is also set by
the MSCAN when the transmission request is successfully aborted due to a pending abort request (see
Section 13.3.2.9, “MSCAN Transmitter Message Abort Request Register (CANTARQ)”). If not masked, a
transmit interrupt is pending while this flag is set.
Clearing a TXEx flag also clears the corresponding ABTAKx (see Section 13.3.2.10, “MSCAN Transmitter
Message Abort Acknowledge Register (CANTAAK)”). When a TXEx flag is set, the corresponding ABTRQx bit
is cleared (see Section 13.3.2.9, “MSCAN Transmitter Message Abort Request Register (CANTARQ)”).
When listen-mode is active (see Section 13.3.2.2, “MSCAN Control Register 1 (CANCTL1)”) the TXEx flags
cannot be cleared and no transmission is started.
Read and write accesses to the transmit buffer will be blocked, if the corresponding TXEx bit is cleared
(TXEx = 0) and the buffer is scheduled for transmission.
0 The associated message buffer is full (loaded with a message due for transmission)
1 The associated message buffer is empty (not scheduled)
Module Base + 0x0007 Access: User read/write(1)
1. Read: Anytime
Write: Anytime when not in initialization mode
76543210
R0 0 0 0 0
TXEIE2 TXEIE1 TXEIE0
W
Reset:00000000
= Unimplemented
Figure 13-11. MSCAN Transmitter Interrupt Enable Register (CANTIER)
Table 13-13. CANTIER Register Field Descriptions
Field Description
2-0
TXEIE[2:0]
Transmitter Empty Interrupt Enable
0 No interrupt request is generated from this event.
1 A transmitter empty (transmit buffer available for transmission) event causes a transmitter empty interrupt
request.
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13.3.2.9 MSCAN Transmitter Message Abort Request Register (CANTARQ)
The CANTARQ register allows abort request of queued messages as described below.
NOTE
The CANTARQ register is held in the reset state when the initialization
mode is active (INITRQ = 1 and INITAK = 1). This register is writable
when not in initialization mode (INITRQ = 0 and INITAK = 0).
Module Base + 0x0008 Access: User read/write(1)
1. Read: Anytime
Write: Anytime when not in initialization mode
76543210
R0 0 0 0 0
ABTRQ2 ABTRQ1 ABTRQ0
W
Reset:00000000
= Unimplemented
Figure 13-12. MSCAN Transmitter Message Abort Request Register (CANTARQ)
Table 13-14. CANTARQ Register Field Descriptions
Field Description
2-0
ABTRQ[2:0]
Abort Request — The CPU sets the ABTRQx bit to request that a scheduled message buffer (TXEx = 0) be
aborted. The MSCAN grants the request if the message has not already started transmission, or if the
transmission is not successful (lost arbitration or error). When a message is aborted, the associated TXE (see
Section 13.3.2.7, “MSCAN Transmitter Flag Register (CANTFLG)”) and abort acknowledge flags (ABTAK, see
Section 13.3.2.10, “MSCAN Transmitter Message Abort Acknowledge Register (CANTAAK)”) are set and a
transmit interrupt occurs if enabled. The CPU cannot reset ABTRQx. ABTRQx is reset whenever the associated
TXE flag is set.
0 No abort request
1 Abort request pending
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13.3.2.10 MSCAN Transmitter Message Abort Acknowledge Register (CANTAAK)
The CANTAAK register indicates the successful abort of a queued message, if requested by the
appropriate bits in the CANTARQ register.
NOTE
The CANTAAK register is held in the reset state when the initialization
mode is active (INITRQ = 1 and INITAK = 1).
13.3.2.11 MSCAN Transmit Buffer Selection Register (CANTBSEL)
The CANTBSEL register allows the selection of the actual transmit message buffer, which then will be
accessible in the CANTXFG register space.
Module Base + 0x0009 Access: User read/write(1)
1. Read: Anytime
Write: Unimplemented
76543210
R0 0 0 0 0 ABTAK2 ABTAK1 ABTAK0
W
Reset:00000000
= Unimplemented
Figure 13-13. MSCAN Transmitter Message Abort Acknowledge Register (CANTAAK)
Table 13-15. CANTAAK Register Field Descriptions
Field Description
2-0
ABTAK[2:0]
Abort Acknowledge — This flag acknowledges that a message was aborted due to a pending abort request
from the CPU. After a particular message buffer is flagged empty, this flag can be used by the application
software to identify whether the message was aborted successfully or was sent anyway. The ABTAKx flag is
cleared whenever the corresponding TXE flag is cleared.
0 The message was not aborted.
1 The message was aborted.
Module Base + 0x000A Access: User read/write(1)
76543210
R0 0 0 0 0
TX2 TX1 TX0
W
Reset:00000000
= Unimplemented
Figure 13-14. MSCAN Transmit Buffer Selection Register (CANTBSEL)
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NOTE
The CANTBSEL register is held in the reset state when the initialization
mode is active (INITRQ = 1 and INITAK=1). This register is writable when
not in initialization mode (INITRQ = 0 and INITAK = 0).
The following gives a short programming example of the usage of the CANTBSEL register:
To get the next available transmit buf fer , application software must read the CANTFLG register and write
this value back into the CANTBSEL register. In this example Tx buf fers TX1 and TX2 are available. The
value read from CANTFLG is therefore 0b0000_01 10. When writing this value back to CANTBSEL, the
Tx buffer TX1 is selected in the CANTXFG because the lowest numbered bit set to 1 is at bit position 1.
Reading back this value out of CANTBSEL results in 0b0000_0010, because only the lowest numbered
bit position set to 1 is presented. This mechanism eases the application software’s selection of the next
available Tx buffer.
LDAA CANTFLG; value read is 0b0000_0110
STAA CANTBSEL; value written is 0b0000_0110
LDAA CANTBSEL; value read is 0b0000_0010
If all transmit message buffers are deselected, no accesses are allowed to the CANTXFG registers.
13.3.2.12 MSCAN Identifier Acceptance Control Register (CANIDAC)
The CANIDAC register is used for identifier acceptance control as described below.
1. Read: Find the lowest ordered bit set to 1, all other bits will be read as 0
Write: Anytime when not in initialization mode
Table 13-16. CANTBSEL Register Field Descriptions
Field Description
2-0
TX[2:0]
Transmit Buffer Select — The lowest numbered bit places the respective transmit buffer in the CANTXFG
register space (e.g., TX1 = 1 and TX0 = 1 selects transmit buffer TX0; TX1 = 1 and TX0 = 0 selects transmit buffer
TX1). Read and write accesses to the selected transmit buffer will be blocked, if the corresponding TXEx bit is
cleared and the buffer is scheduled for transmission (see Section 13.3.2.7, “MSCAN Transmitter Flag Register
(CANTFLG)”).
0 The associated message buffer is deselected
1 The associated message buffer is selected, if lowest numbered bit
Module Base + 0x000B Access: User read/write(1)
76543210
R0 0
IDAM1 IDAM0
0 IDHIT2 IDHIT1 IDHIT0
W
Reset:00000000
= Unimplemented
Figure 13-15. MSCAN Identifier Acceptance Control Register (CANIDAC)
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The IDHITx indicators are always related to the message in the foreground buffer (RxFG). When a
message gets shifted into the foreground buffer of the receiver FIFO the indicators are updated as well.
13.3.2.13 MSCAN Reserved Register
This register is reserved for factory testing of the MSCAN module and is not available in normal system
operating modes.
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1), except bits IDHITx, which are read-only
Table 13-17. CANIDAC Register Field Descriptions
Field Description
5-4
IDAM[1:0]
Identifier Acceptance Mode — The CPU sets these flags to define the identifier acceptance filter organization
(see Section 13.4.3, “Identifier Acceptance Filter”). Table 13-18 summarizes the different settings. In filter closed
mode, no message is accepted such that the foreground buffer is never reloaded.
2-0
IDHIT[2:0]
Identifier Acceptance Hit Indicator — The MSCAN sets these flags to indicate an identifier acceptance hit (see
Section 13.4.3, “Identifier Acceptance Filter”). Table 13-19 summarizes the different settings.
Table 13-18. Identifier Acceptance Mode Settings
IDAM1 IDAM0 Identifier Acceptance Mode
0 0 Two 32-bit acceptance filters
0 1 Four 16-bit acceptance filters
1 0 Eight 8-bit acceptance filters
1 1 Filter closed
Table 13-19. Identifier Acceptance Hit Indication
IDHIT2 IDH IT1 ID HIT0 Identifier Acceptance Hit
0 0 0 Filter 0 hit
0 0 1 Filter 1 hit
0 1 0 Filter 2 hit
0 1 1 Filter 3 hit
1 0 0 Filter 4 hit
1 0 1 Filter 5 hit
1 1 0 Filter 6 hit
1 1 1 Filter 7 hit
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NOTE
Writing to this register when in special system operating modes can alter the
MSCAN functionality.
13.3.2.14 MSCAN Miscellaneous Register (CANMISC)
This register provides additional features.
13.3.2.15 MSCAN Receive Error Counter (CANRXERR)
This register reflects the status of the MSCAN receive error counter.
Module Base + 0x000C Access: User read/write(1)
1. Read: Always reads zero in normal system operation modes
Write: Unimplemented in normal system operation modes
76543210
R00000000
W
Reset:00000000
= Unimplemented
Figure 13-16. MSCAN Reserved Register
Module Base + 0x000D Access: User read/write(1)
1. Read: Anytime
Write: Anytime; write of ‘1’ clears flag; write of ‘0’ ignored
76543210
R0000000
BOHOLD
W
Reset:00000000
= Unimplemented
Figure 13-17. MSCAN Miscellaneous Register (CANMISC)
Table 13-20. CANMISC Register Field Descriptions
Field Description
0
BOHOLD
Bus-off State Hold Until User Request — If BORM is set in MSCAN Control Register 1 (CANCTL1), this bit
indicates whether the module has entered the bus-off state. Clearing this bit requests the recovery from bus-off.
Refer to Section 13.5.2, “Bus-Off Recovery,” for details.
0 Module is not bus-off or recovery has been requested by user in bus-off state
1 Module is bus-off and holds this state until user request
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NOTE
Reading this register when in any other mode other than sleep or
initialization mode may return an incorrect value. For MCUs with dual
CPUs, this may result in a CPU fault condition.
13.3.2.16 MSCAN Transmit Error Counter (CANTXERR)
This register reflects the status of the MSCAN transmit error counter.
NOTE
Reading this register when in any other mode other than sleep or
initialization mode, may return an incorrect value. For MCUs with dual
CPUs, this may result in a CPU fault condition.
Module Base + 0x000E Access: User read/write(1)
1. Read: Only when in sleep mode (SLPRQ = 1 and SLPAK = 1) or initialization mode (INITRQ = 1 and INITAK = 1)
Write: Unimplemented
76543210
R RXERR7 RXERR6 RXERR5 RXERR4 RXERR3 RXERR2 RXERR1 RXERR0
W
Reset:00000000
= Unimplemented
Figure 13-18. MSCAN Receive Error Counter (CANRXERR)
Module Base + 0x000F Access: User read/write(1)
1. Read: Only when in sleep mode (SLPRQ = 1 and SLPAK = 1) or initialization mode (INITRQ = 1 and INITAK = 1)
Write: Unimplemented
76543210
R TXERR7 TXERR6 TXERR5 TXERR4 TXERR3 TXERR2 TXERR1 TXERR0
W
Reset:00000000
= Unimplemented
Figure 13-19. MSCAN Transmit Error Counter (CANTXERR)
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13.3.2.17 MSCAN Identifier Acceptance Registers (CANIDAR0-7)
On reception, each message is written into the background receive buffer. The CPU is only signalled to
read the message if it passes the criteria in the identifier acceptance and identifier mask registers
(accepted); otherwise, the message is overwritten by the next message (dropped).
The acceptance registers of the MSCAN are applied on the IDR0–IDR3 registers (see Section 13.3.3.1,
“Identifier Registers (IDR0–IDR3)”) of incoming messages in a bit by bit manner (see Section 13.4.3,
“Identifier Acceptance Filter”).
For extended identifiers, all four acceptance and mask registers are applied. For standard identifiers, only
the first two (CANIDAR0/1, CANIDMR0/1) are applied.
Module Base + 0x0010 to Module Base + 0x0013 Access: User read/write(1)
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
76543210
R
AC7 AC6 AC5 AC4 AC3 AC2 AC1 AC0
W
Reset00000000
Figure 13-20. MSCAN Identifier Acceptance Registers (First Bank) — CANIDAR0–CANIDAR3
Table 13-21. CANIDAR0–CANIDAR3 Register Field Descriptions
Field Description
7-0
AC[7:0]
Acceptance Code Bits — AC[7:0] comprise a user-defined sequence of bits with which the corresponding bits
of the related identifier register (IDRn) of the receive message buffer are compared. The result of this comparison
is then masked with the corresponding identifier mask register.
Module Base + 0x0018 to Module Base + 0x001B Access: User read/write(1)
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
76543210
R
AC7 AC6 AC5 AC4 AC3 AC2 AC1 AC0
W
Reset00000000
Figure 13-21. MSCAN Identifier Acceptance Registers (Second Bank) — CANIDAR4–CANIDAR7
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13.3.2.18 MSCAN Identifier Mask Registers (CANIDMR0–CANIDMR7)
The identifier mask register specifies which of the corresponding bits in the identifier acceptance register
are relevant for acceptance filtering. To receive standard identifiers in 32 bit filter mode, it is required to
program the last three bits (AM[2:0]) in the mask registers CANIDMR1 and CANIDMR5 to “don’t care.”
To receive standard identif iers in 16 bit filter mode, it is required to program the last three bits (AM[2:0])
in the mask registers CANIDMR1, CANIDMR3, CANIDMR5, and CANIDMR7 to “don’t care.”
Table 13-22. CANIDAR4–CANIDAR7 Register Field Descriptions
Field Description
7-0
AC[7:0]
Acceptance Code Bits — AC[7:0] comprise a user-defined sequence of bits with which the corresponding bits
of the related identifier register (IDRn) of the receive message buffer are compared. The result of this comparison
is then masked with the corresponding identifier mask register.
Module Base + 0x0014 to Module Base + 0x0017 Access: User read/write(1)
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
76543210
R
AM7 AM6 AM5 AM4 AM3 AM2 AM1 AM0
W
Reset00000000
Figure 13-22. MSCAN Identifier Mask Registers (First Bank) — CANIDMR0–CANIDMR3
Table 13-23. CANIDMR0–CANIDMR3 Register Field Descriptions
Field Description
7-0
AM[7:0]
Acceptance Mask BitsIf a particular bit in this register is cleared, this indicates that the corresponding bit in
the identifier acceptance register must be the same as its identifier bit before a match is detected. The message
is accepted if all such bits match. If a bit is set, it indicates that the state of the corresponding bit in the identifier
acceptance register does not affect whether or not the message is accepted.
0 Match corresponding acceptance code register and identifier bits
1 Ignore corresponding acceptance code register bit
Module Base + 0x001C to Module Base + 0x001F Access: User read/write(1)
76543210
R
AM7 AM6 AM5 AM4 AM3 AM2 AM1 AM0
W
Reset00000000
Figure 13-23. MSCAN Identifier Mask Registers (Second Bank) — CANIDMR4–CANIDMR7
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13.3.3 Programmers Model of Message Storage
The following section details the organization of the receive and transmit message buffers and the
associated control registers.
To simplify the programmer interface, the receive and transmit message buffers have the same outline.
Each message buffer allocates 16 bytes in the memory map containing a 13 byte data structure.
An additional transmit buffer priority register (TBPR) is defined for the transmit buffers. Within the last
two bytes of this memory map, the MSCAN stores a special 16-bit time stamp, which is sampled from an
internal timer after successful transmission or reception of a message. This feature is only available for
transmit and receiver buffers, if the TIME bit is set (see Section 13.3.2.1, “MSCAN Control Register 0
(CANCTL0)”).
The time stamp register is written by the MSCAN. The CPU can only read these registers.
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
Table 13-24. CANIDMR4–CANIDMR7 Register Field Descriptions
Field Description
7-0
AM[7:0]
Acceptance Mask BitsIf a particular bit in this register is cleared, this indicates that the corresponding bit in
the identifier acceptance register must be the same as its identifier bit before a match is detected. The message
is accepted if all such bits match. If a bit is set, it indicates that the state of the corresponding bit in the identifier
acceptance register does not affect whether or not the message is accepted.
0 Match corresponding acceptance code register and identifier bits
1 Ignore corresponding acceptance code register bit
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Figure 13-24 shows the common 13-byte data structure of receive and transmit buffers for extended
identifiers. The mapping of standard identifiers into the IDR registers is shown in Figure 13-25.
All bits of the receive and transmit buffers are ‘x’ out of reset because of RAM-based implementation1.
All reserved or unused bits of the receive and transmit buffers always read ‘x’.
Table 13-25. Message Buffer Organization
Offset
Address Register Access
0x00X0 IDR0 — Identifier Register 0 R/W
0x00X1 IDR1 — Identifier Register 1 R/W
0x00X2 IDR2 — Identifier Register 2 R/W
0x00X3 IDR3 — Identifier Register 3 R/W
0x00X4 DSR0 — Data Segment Register 0 R/W
0x00X5 DSR1 — Data Segment Register 1 R/W
0x00X6 DSR2 — Data Segment Register 2 R/W
0x00X7 DSR3 — Data Segment Register 3 R/W
0x00X8 DSR4 — Data Segment Register 4 R/W
0x00X9 DSR5 — Data Segment Register 5 R/W
0x00XA DSR6 — Data Segment Register 6 R/W
0x00XB DSR7 — Data Segment Register 7 R/W
0x00XC DLR — Data Length Register R/W
0x00XD TBPR — Transmit Buffer Priority Register(1)
1. Not applicable for receive buffers
R/W
0x00XE TSRH — Time Stamp Register (High Byte) R
0x00XF TSRL — Time Stamp Register (Low Byte) R
1. Exception: The transmit buffer priority registers are 0 out of reset.
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Figure 13-24. Receive/Transmit Message Buffer — Extended Identifier Mapping
Register
Name Bit 7654321Bit0
0x00X0
IDR0
R
ID28 ID27 ID26 ID25 ID24 ID23 ID22 ID21
W
0x00X1
IDR1
R
ID20 ID19 ID18 SRR (=1) IDE (=1) ID17 ID16 ID15
W
0x00X2
IDR2
R
ID14 ID13 ID12 ID11 ID10 ID9 ID8 ID7
W
0x00X3
IDR3
R
ID6 ID5 ID4 ID3 ID2 ID1 ID0 RTR
W
0x00X4
DSR0
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
0x00X5
DSR1
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
0x00X6
DSR2
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
0x00X7
DSR3
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
0x00X8
DSR4
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
0x00X9
DSR5
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
0x00XA
DSR6
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
0x00XB
DSR7
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
0x00XC
DLR
RDLC3 DLC2 DLC1 DLC0
W
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Read:
For transmit buffers, anytime when TXEx flag is set (see Section 13.3.2.7, “MSCAN Transmitter
Flag Register (CANTFLG)”) and the corresponding transmit buffer is selected in CANTBSEL (see
Section 13.3.2.11, “MSCAN Transmit Buffer Selection Register (CANTBSEL)”).
For receive buffers, only when RXF flag is set (see Section 13.3.2.5, “MSCAN Receiver Flag
Register (CANRFLG)”).
Write:
For transmit buffers, anytime when TXEx flag is set (see Section 13.3.2.7, “MSCAN Transmitter
Flag Register (CANTFLG)”) and the corresponding transmit buffer is selected in CANTBSEL (see
Section 13.3.2.11, “MSCAN Transmit Buffer Selection Register (CANTBSEL)”).
Unimplemented for receive buffers.
Reset: Undefined because of RAM-based implementation
13.3.3.1 Identifier Registers (IDR0–IDR3)
The identifier registers for an extended format identifier consist of a total of 32 bits: ID[28:0], SRR, IDE,
and RTR. The identifier registers for a standard format identifier consist of a total of 13 bits: ID[10:0],
RTR, and IDE.
= Unused, always read ‘x’
Figure 13-25. Receive/Transmit Message Buffer — Standard Identifier Mapping
Register
Name Bit 7654321Bit 0
IDR0
0x00X0
R
ID10 ID9 ID8 ID7 ID6 ID5 ID4 ID3
W
IDR1
0x00X1
R
ID2 ID1 ID0 RTR IDE (=0)
W
IDR2
0x00X2
R
W
IDR3
0x00X3
R
W
= Unused, always read ‘x’
Figure 13-24. Receive/Transmit Message Buffer — Extended Identifier Mapping (continued)
Register
Name Bit 7654321Bit0
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13.3.3.1.1 IDR0–IDR3 for Extended Identifier Mapping
Module Base + 0x00X0
76543210
R
ID28 ID27 ID26 ID25 ID24 ID23 ID22 ID21
W
Reset:xxxxxxxx
Figure 13-26. Identifier Register 0 (IDR0) — Extended Identifier Mapping
Table 13-26. IDR0 Register Field Descriptions — Extended
Field Description
7-0
ID[28:21]
Extended Format Identifier — The identifiers consist of 29 bits (ID[28:0]) for the extended format. ID28 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number.
Module Base + 0x00X1
76543210
R
ID20 ID19 ID18 SRR (=1) IDE (=1) ID17 ID16 ID15
W
Reset:xxxxxxxx
Figure 13-27. Identifier Register 1 (IDR1) — Extended Identifier Mapping
Table 13-27. IDR1 Register Field Descriptions — Extended
Field Description
7-5
ID[20:18]
Extended Format Identifier — The identifiers consist of 29 bits (ID[28:0]) for the extended format. ID28 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number.
4
SRR
Substitute Remote Request — This fixed recessive bit is used only in extended format. It must be set to 1 by
the user for transmission buffers and is stored as received on the CAN bus for receive buffers.
3
IDE
ID Extended This flag indicates whether the extended or standard identifier format is applied in this buffer. In
the case of a receive buffer, the flag is set as received and indicates to the CPU how to process the buffer
identifier registers. In the case of a transmit buffer, the flag indicates to the MSCAN what type of identifier to send.
0 Standard format (11 bit)
1 Extended format (29 bit)
2-0
ID[17:15]
Extended Format Identifier — The identifiers consist of 29 bits (ID[28:0]) for the extended format. ID28 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number.
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Module Base + 0x00X2
76543210
R
ID14 ID13 ID12 ID11 ID10 ID9 ID8 ID7
W
Reset:xxxxxxxx
Figure 13-28. Identifier Register 2 (IDR2) — Extended Identifier Mapping
Table 13-28. IDR2 Register Field Descriptions — Extended
Field Description
7-0
ID[14:7]
Extended Format Identifier — The identifiers consist of 29 bits (ID[28:0]) for the extended format. ID28 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number.
Module Base + 0x00X3
76543210
R
ID6 ID5 ID4 ID3 ID2 ID1 ID0 RTR
W
Reset:xxxxxxxx
Figure 13-29. Identifier Register 3 (IDR3) — Extended Identifier Mapping
Table 13-29. IDR3 Register Field Descriptions — Extended
Field Description
7-1
ID[6:0]
Extended Format Identifier — The identifiers consist of 29 bits (ID[28:0]) for the extended format. ID28 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number.
0
RTR
Remote Transmission Request This flag reflects the status of the remote transmission request bit in the CAN
frame. In the case of a receive buffer, it indicates the status of the received frame and supports the transmission
of an answering frame in software. In the case of a transmit buffer, this flag defines the setting of the RTR bit to
be sent.
0 Data frame
1 Remote frame
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13.3.3.1.2 IDR0–IDR3 for Standard Identifier Mapping
Module Base + 0x00X0
76543210
R
ID10ID9ID8ID7ID6ID5ID4ID3
W
Reset:xxxxxxxx
Figure 13-30. Identifier Register 0 — Standard Mapping
Table 13-30. IDR0 Register Field Descriptions — Standard
Field Description
7-0
ID[10:3]
Standard Format Identifier The identifiers consist of 11 bits (ID[10:0]) for the standard format. ID10 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number. See also ID bits in Table 13-31.
Module Base + 0x00X1
76543210
R
ID2 ID1 ID0 RTR IDE (=0)
W
Reset:xxxxxxxx
= Unused; always read ‘x’
Figure 13-31. Identifier Register 1 — Standard Mapping
Table 13-31. IDR1 Register Field Descriptions
Field Description
7-5
ID[2:0]
Standard Format Identifier — The identifiers consist of 11 bits (ID[10:0]) for the standard format. ID10 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number. See also ID bits in Table 13-30.
4
RTR
Remote Transmission RequestThis flag reflects the status of the Remote Transmission Request bit in the
CAN frame. In the case of a receive buffer, it indicates the status of the received frame and supports the
transmission of an answering frame in software. In the case of a transmit buffer, this flag defines the setting of
the RTR bit to be sent.
0 Data frame
1 Remote frame
3
IDE
ID Extended This flag indicates whether the extended or standard identifier format is applied in this buffer. In
the case of a receive buffer, the flag is set as received and indicates to the CPU how to process the buffer
identifier registers. In the case of a transmit buffer, the flag indicates to the MSCAN what type of identifier to send.
0 Standard format (11 bit)
1 Extended format (29 bit)
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13.3.3.2 Data Segment Registers (DSR0-7)
The eight data segment registers, each with bits DB[7:0], contain the data to be transmitted or received.
The number of bytes to be transmitted or received is determined by the data length code in the
corresponding DLR register.
Module Base + 0x00X2
76543210
R
W
Reset:xxxxxxxx
= Unused; always read ‘x’
Figure 13-32. Identifier Register 2 — Standard Mapping
Module Base + 0x00X3
76543210
R
W
Reset:xxxxxxxx
= Unused; always read ‘x’
Figure 13-33. Identifier Register 3 — Standard Mapping
Module Base + 0x00X4 to Module Base + 0x00XB
76543210
R
DB7DB6DB5DB4DB3DB2DB1DB0
W
Reset:xxxxxxxx
Figure 13-34. Data Segment Registers (DSR0–DSR7) — Extended Identifier Mapping
Table 13-32. DSR0–DSR7 Register Field Descriptions
Field Description
7-0
DB[7:0]
Data bits 7-0
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13.3.3.3 Data Length Register (DLR)
This register keeps the data length field of the CAN frame.
13.3.3.4 Transmit Buffer Priority Register (TBPR)
This register defines the local priority of the associated message buffer. The local priority is used for the
internal prioritization process of the MSCAN and is defined to be highest for the smallest binary number.
The MSCAN implements the following internal prioritization mechanisms:
All transmission buffers with a cleared TXEx flag participate in the prioritization immediately
before the SOF (start of frame) is sent.
Module Base + 0x00XC
76543210
R
DLC3 DLC2 DLC1 DLC0
W
Reset:xxxxxxxx
= Unused; always read “x”
Figure 13-35. Data Length Register (DLR) — Extended Identifier Mapping
Table 13-33. DLR Register Field Descriptions
Field Description
3-0
DLC[3:0]
Data Length Code Bits The data length code contains the number of bytes (data byte count) of the respective
message. During the transmission of a remote frame, the data length code is transmitted as programmed while
the number of transmitted data bytes is always 0. The data byte count ranges from 0 to 8 for a data frame.
Table 13-34 shows the effect of setting the DLC bits.
Table 13-34. Data Length Codes
Data Length Code Data Byte
Count
DLC3 DLC2 DLC1 DLC0
00000
00011
00102
00113
01004
01015
01106
01117
10008
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The transmission buffer with the lowest local priority field wins the prioritization.
In cases of more than one buffer having the same lowe st priority, the message buf fer with the lower ind ex
number wins.
13.3.3.5 Time Stamp Register (TSRH–TSRL)
If the TIME bit is enabled, the MSCAN will write a time stamp to the respective registers in the active
transmit or receive buffer right after the EOF of a valid message on the CAN bus (see Section 13.3.2.1,
“MSCAN Control Register 0 (CANCTL0)”). In case of a transmission, the CPU can only read the time
stamp after the respective transmit buffer has been flagged empty.
The timer value, which is used for stamping, is taken from a free running internal CAN bit clock. A timer
overrun is not indicated by the MSCAN. The timer is reset (all bits set to 0) during initialization mode. The
CPU can only read the time stamp registers.
Module Base + 0x00XD Access: User read/write(1)
1. Read: Anytime when TXEx flag is set (see Section 13.3.2.7, “MSCAN Transmitter Flag Register (CANTFLG)”) and the
corresponding transmit buffer is selected in CANTBSEL (see Section 13.3.2.11, “MSCAN Transmit Buffer Selection Register
(CANTBSEL)”)
Write: Anytime when TXEx flag is set (see Section 13.3.2.7, “MSCAN Transmitter Flag Register (CANTFLG)”) and the
corresponding transmit buffer is selected in CANTBSEL (see Section 13.3.2.11, “MSCAN Transmit Buffer Selection Register
(CANTBSEL)”)
76543210
R
PRIO7 PRIO6 PRIO5 PRIO4 PRIO3 PRIO2 PRIO1 PRIO0
W
Reset:00000000
Figure 13-36. Transmit Buffer Priority Register (TBPR)
Module Base + 0x00XE Access: User read/write(1)
1. Read: For transmit buffers: Anytime when TXEx flag is set (see Section 13.3.2.7, “MSCAN Transmitter Flag Register
(CANTFLG)”) and the corresponding transmit buffer is selected in CANTBSEL (see Section 13.3.2.11, “MSCAN Transmit
Buffer Selection Register (CANTBSEL)”). For receive buffers: Anytime when RXF is set.
Write: Unimplemented
76543210
R TSR15 TSR14 TSR13 TSR12 TSR11 TSR10 TSR9 TSR8
W
Reset:xxxxxxxx
Figure 13-37. Time Stamp Register — High Byte (TSRH)
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Module Base + 0x00XF Access: User read/write(1)
1. Read: or transmit buffers: Anytime when TXEx flag is set (see Section 13.3.2.7, “MSCAN Transmitter Flag Register
(CANTFLG)”) and the corresponding transmit buffer is selected in CANTBSEL (see Section 13.3.2.11, “MSCAN Transmit
Buffer Selection Register (CANTBSEL)”). For receive buffers: Anytime when RXF is set.
Write: Unimplemented
76543210
R TSR7 TSR6 TSR5 TSR4 TSR3 TSR2 TSR1 TSR0
W
Reset:xxxxxxxx
Figure 13-38. Time Stamp Register — Low Byte (TSRL)
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13.4 Functional Description
13.4.1 General
This section provides a complete functional description of the MSCAN.
13.4.2 Message Storage
Figure 13-39. User Model for Message Buffer Organization
MSCAN
Rx0
Rx1
CAN Receive / Transmit Engine Memory Mapped I/O
CPU bus
MSCAN
Tx2
TXE2
PRIO
Receiver
Transmitter
RxBG
TxBG
Tx0
TXE0
PRIO
TxBG
Tx1
PRIO
TXE1
TxFG
CPU bus
Rx2
Rx3
Rx4
RXF
RxFG
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The MSCAN facilitates a sophisticated message storage system which addresses the requirements of a
broad range of network applications.
13.4.2.1 Message Transmit Background
Modern application layer software is built upon two fundamental assumptions:
Any CAN node is able to send out a stream of scheduled messages without releasing the CAN bus
between the two messages. Such nodes arbitrate for the CAN bus immediately after sending the
previous message and only release the CAN bus in case of lost arbitration.
The internal message queue within any CAN node is organized such that the highest priority
message is sent out first, if more than one message is ready to be sent.
The behavior described in the bullets above cannot be achieved with a single transmit buffer. That buffer
must be reloaded immediately after the previous message is sent. This loading process lasts a finite amount
of time and must be completed within the inter-frame sequence (IFS) to be able to send an uninterrupted
stream of messages. Even if this is feasible for limited CAN bus speeds, it requires that the CPU reacts
with short latencies to the transmit interrupt.
A double buffer scheme de-couples the reloading of the transmit buffer from the actual message sending
and, therefore, reduces the reactiveness requirements of the CPU. Problems can arise if the sending of a
message is finished while the CPU re-loads the second buffer. No buffer would then be ready for
transmission, and the CAN bus would be released.
At least three transmit buffers are required to meet the first of the above requirements under all
circumstances. The MSCAN has three transmit buffers.
The second requirement calls for some sort of internal prioritization which the MSCAN implements with
the “local priority” concept described in Section 13.4.2.2, “Transmit Structures.”
13.4.2.2 Transmit Structures
The MSCAN triple transmit buffer scheme optimizes real-time performance by allowing multiple
messages to be set up in advance. The three buffers are arranged as shown in Figure 13-39.
All three buffers have a 13-byte data structure similar to the outline of the receive buffers (see
Section 13.3.3, “Programmers Model of Message Storage”). An additional Transmit Buffer Priority
Register (TBPR) contains an 8-bit local priority field (PRIO) (see Section 13.3.3.4, “Transmit Buffer
Priority Register (TBPR)”). The remaining two bytes are used for time stamping of a message, if required
(see Section 13.3.3.5, “Time Stamp Register (TSRH–TSRL)”).
To transmit a message, the CPU must identify an available transmit buffer, which is indicated by a set
transmitter buffer empty (TXEx) flag (see Section 13.3.2.7, “MSCAN Transmitter Flag Register
(CANTFLG)”). If a transmit buffer is available, the CPU must set a pointer to this buf fer by writing to the
CANTBSEL register (see Section 13.3.2.11, “MSCAN Transmit Buffer Selection Register
(CANTBSEL)”). This makes the respective buffer accessible within the CANTXFG address space (see
Section 13.3.3, “Programmers Model of Message Storage”). The algorithmic feature associated with the
CANTBSEL register simplifies the transmit buffer selection. In addition, this scheme makes the handler
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software simpler because only one address area is applicable for the transmit process, and the required
address space is minimized.
The CPU then stores the identifier, the control bits, and the data content into one of the transmit buffers.
Finally, the buffer is flagged as ready for transmission by clearing the associated TXE flag.
The MSCAN then schedules the message for transmission and signals the successful transmission of the
buffer by setting the associated TXE flag. A transmit interrupt (see Section 13.4.7.2, “Transmit Interrupt”)
is generated1 when TXEx is set and can be used to drive the application software to re-load the buffer.
If more than one buffer is scheduled for transmission when the CAN bus becomes available for arbitration,
the MSCAN uses the local priority setting of the three buffers to determine the prioritization. For this
purpose, every transmit buffer has an 8-bit local priority field (PRIO). The application software programs
this field when the message is set up. The local priority reflects the priority of this particular message
relative to the set of messages being transmitted from this node. The lowest binary value of the PRIO field
is defined to be the highest priority. The internal scheduling process takes place whenever the MSCAN
arbitrates for the CAN bus. This is also the case after the occurrence of a transmission error.
When a high priority message is scheduled by the application software, it may become n ecessary to abort
a lower priority message in one of the three transmit buffers. Because messages that are already in
transmission cannot be aborted, the user must request the abort by setting the corresponding abort request
bit (ABTRQ) (see Section 13.3.2.9, “MSCAN Transmitter Message Abort Request Register
(CANTARQ)”.) The MSCAN then grants the request, if possible, by:
1. Setting the corresponding abort acknowledge flag (ABTAK) in the CANTAAK register.
2. Setting the associated TXE flag to release the buffer.
3. Generating a transmit interrupt. The transmit interrupt handler software can determine from the
setting of the ABTAK flag whether the message was aborted (ABTAK = 1) or sent (ABTAK = 0).
13.4.2.3 Receive Structures
The received messages are stored in a five stage input FIFO. The five message buffers are alternately
mapped into a single memory area (see Figure 13-39). The background receive buffer (RxBG) is
exclusively associated with the MSCAN, but the foreground receive buffer (RxFG) is addressable by the
CPU (see Figure 13-39). This scheme simplifies the handler software because only one address area is
applicable for the receive process.
All receive buffers have a size of 15 bytes to store the CAN control bits, the identifier (standard or
extended), the data contents, and a time stamp, if enabled (see Section 13.3.3, “Programmers Model of
Message Storage”).
The receiver full flag (RXF) (see Section 13.3.2.5, “MSCAN Receiver Flag Register (CANRFLG)”)
signals the status of the foreground receive buf fer. When the buffer contains a correctly received message
with a matching identifier, this flag is set.
On reception, each message is checked to see whether it passes the filter (see Section 13.4.3, “Identifier
Acceptance Filter”) and simultaneously is written into the active RxBG. After successful reception of a
valid message, the MSCAN shifts the content of RxBG into the receiver FIFO, sets the RXF flag, and
1. The transmit interrupt occurs only if not masked. A polling scheme can be applied on TXEx also.
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generates a receive interrupt1 (see Section 13.4.7.3, “Receive Interrupt”) to the CPU. The users receive
handler must read the received message from the RxFG and then reset the RXF flag to acknowledge the
interrupt and to release the foreground buffer. A new message, which can follow immediately after the IFS
field of the CAN frame, is received into the next available RxBG. If the MSCAN receives an invalid
message in its RxBG (wrong identifier, transmission errors, etc.) the actual contents of the buffer will be
over-written by the next message. The buffer will then not be shifted into the FIFO.
When the MSCAN module is transmitting, the MSCAN receives its own transmitted messages into the
background receive buffer , RxBG, but does not shift it into the receiver FIFO, generate a receive interrupt,
or acknowledge its own messages on the CAN bus. The exception to this rule is in loopback mode (see
Section 13.3.2.2, “MSCAN Control Register 1 (CANCTL1)”) where the MSCAN treats its own messages
exactly like all other incoming messages. The MSCAN receives its own transmitted messages in the event
that it loses arbitration. If arbitration is lost, the MSCAN must be prepared to become a receiver.
An overrun condition occurs when all receive message buffers in the FIFO are filled with correctly
received messages with accepted identifiers and another mess age is correctly received from the CAN bus
with an accepted identifier. The latter message is discarded and an er ror interrupt with overrun indication
is generated if enabled (see Section 13.4.7.5, “Error Interrupt”). The MSCAN remains able to transmit
messages while the receiver FIFO is being filled, but all incoming messages are discarded. As soon as a
receive buffer in the FIFO is available again, new valid messages will be accepted.
13.4.3 Identifier Acceptance Filter
The MSCAN identifier acceptance registers (see Section 13.3.2.12, “MSCAN Identifier Acceptance
Control Register (CANIDAC)”) define the acceptable patterns of the standard or extended identifier
(ID[10:0] or ID[28:0]). Any of these bits can be marked ‘don’t care’ in the MSCAN identifier mask
registers (see Section 13.3.2.18, “MSCAN Identifier Mask Registers (CANIDMR0–CANIDMR7)”).
A filter hit is indicated to the applica tion software by a set receive buffe r full flag (RXF = 1) and three bits
in the CANIDAC register (see Section 13.3.2.12, “MSCAN Identifier Acceptance Control Register
(CANIDAC)”). These identifier hit flags (IDHIT[2:0]) clearly identify the filter section that caused the
acceptance. They simplify the application software’s task to identify the cause of the receiver interrupt. If
more than one hit occurs (two or more filters match), the lower hit has priority.
A very flexible programmable generic identifier acceptance filter has been introduced to reduce the CPU
interrupt loading. The filter is programmable to operate in four different modes:
Two identifier acceptance filters, each to be applied to:
The full 29 bits of the extended identifier and to the following bits of the CAN 2.0B frame:
Remote transmission request (RTR)
Identifier extension (IDE)
Substitute remote request (SRR)
The 1 1 bits of the standard identifier plus the RTR and IDE bits of the CAN 2.0A/B messages.
This mode implements two filters for a full length CAN 2.0B compliant extended identifier.
Although this mode can be used for standard identifiers, it is recommended to use the four or
eight identifier acceptance filters.
1. The receive interrupt occurs only if not masked. A polling scheme can be applied on RXF also.
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Figure 13-40 shows how the first 32-bit filter bank (CANIDAR0–CANIDAR3,
CANIDMR0–CANIDMR3) produces a filter 0 hit. Similarly, the second filter bank
(CANIDAR4–CANIDAR7, CANIDMR4–CANIDMR7) produces a filter 1 hit.
Four identifier acceptance filters, each to be applied to:
The 14 most significant bits of the extended identifier plus the SRR and IDE bits of CAN 2.0B
messages.
The 11 bits of the standard identifier, the RTR and IDE bits of CAN 2.0A/B messages.
Figure 13-41 shows how the first 32-bit filter bank (CANIDAR0–CANIDAR3,
CANIDMR0–CANIDMR3) produces filter 0 and 1 hits. Similarly, the second filter bank
(CANIDAR4–CANIDAR7, CANIDMR4–CANIDMR7) produces filter 2 and 3 hits.
Eight identifier acceptance filters, each to be applied to the first 8 bits of the identifier. This mode
implements eight independent filters for the first 8 bits of a CAN 2.0A/B compliant standard
identifier or a CAN 2.0B compliant extended identifier.
Figure 13-42 shows how the first 32-bit filter bank (CANIDAR0–CANIDAR3,
CANIDMR0–CANIDMR3) produces filter 0 to 3 hits. Similarly, the second filter bank
(CANIDAR4–CANIDAR7, CANIDMR4–CANIDMR7) produces filter 4 to 7 hits.
Closed filter. No CAN message is copied into the foreground buffer RxFG, and the RXF flag is
never set.
Figure 13-40. 32-bit Maskable Identifier Acceptance Filter
ID28 ID21IDR0
ID10 ID3IDR0
ID20 ID15IDR1
ID2 IDEIDR1
ID14 ID7IDR2
ID10 ID3IDR2
ID6 RTRIDR3
ID10 ID3IDR3
AC7 AC0CANIDAR0
AM7 AM0CANIDMR0
AC7 AC0CANIDAR1
AM7 AM0CANIDMR1
AC7 AC0CANIDAR2
AM7 AM0CANIDMR2
AC7 AC0CANIDAR3
AM7 AM0CANIDMR3
ID Accepted (Filter 0 Hit)
CAN 2.0B
Extended Identifier
CAN 2.0A/B
Standard Identifier
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Figure 13-41. 16-bit Maskable Identifier Acceptance Filters
ID28 ID21IDR0
ID10 ID3IDR0
ID20 ID15IDR1
ID2 IDEIDR1
ID14 ID7IDR2
ID10 ID3IDR2
ID6 RTRIDR3
ID10 ID3IDR3
AC7 AC0CANIDAR0
AM7 AM0CANIDMR0
AC7 AC0CANIDAR1
AM7 AM0CANIDMR1
ID Accepted (Filter 0 Hit)
AC7 AC0CANIDAR2
AM7 AM0CANIDMR2
AC7 AC0CANIDAR3
AM7 AM0CANIDMR3
ID Accepted (Filter 1 Hit)
CAN 2.0B
Extended Identifier
CAN 2.0A/B
Standard Identifier
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Figure 13-42. 8-bit Maskable Identifier Acceptance Filters
CAN 2.0B
Extended Identifier
CAN 2.0A/B
Standard Identifier
AC7 AC0CIDAR3
AM7 AM0CIDMR3
ID Accepted (Filter 3 Hit)
AC7 AC0CIDAR2
AM7 AM0CIDMR2
ID Accepted (Filter 2 Hit)
AC7 AC0CIDAR1
AM7 AM0CIDMR1
ID Accepted (Filter 1 Hit)
ID28 ID21IDR0
ID10 ID3IDR0
ID20 ID15IDR1
ID2 IDEIDR1
ID14 ID7IDR2
ID10 ID3IDR2
ID6 RTRIDR3
ID10 ID3IDR3
AC7 AC0CIDAR0
AM7 AM0CIDMR0
ID Accepted (Filter 0 Hit)
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13.4.3.1 Protocol Violation Protection
The MSCAN protects the user from accidentally violating the CAN protocol through programming errors.
The protection logic implements the following features:
The receive and transmit error counters cannot be written or otherwise manipulated.
All registers which control the configuration of the MSCAN cannot be modified while the MSCAN
is on-line. The MSCAN has to be in Initialization Mode. The corresponding INITRQ/INITAK
handshake bits in the CANCTL0/CANCTL1 registers (see Section 13.3.2.1, “MSCAN Control
Register 0 (CANCTL0)”) serve as a lock to protect the following registers:
MSCAN control 1 register (CANCTL1)
MSCAN bus timing registers 0 and 1 (CANBTR0, CANBTR1)
MSCAN identifier acceptance control register (CANIDAC)
MSCAN identifier acceptance registers (CANIDAR0–CANIDAR7)
MSCAN identifier mask registers (CANIDMR0–CANIDMR7)
The TXCAN is immediately forced to a recessive state when the MSCAN goes into the power
down mode or initialization mode (see Section 13.4.5.6, “MSCAN Power Down Mode,” and
Section 13.4.4.5, “MSCAN Initialization Mode”).
The MSCAN enable bit (CANE) is writable only once in normal system operation modes, which
provides further protection against inadvertently disabling the MSCAN.
13.4.3.2 Clock System
Figure 13-43 shows the structure of the MSCAN clock generation circuitry.
Figure 13-43. MSCAN Clocking Scheme
The clock source bit (CLKSRC) in the CANCTL1 register (13.3.2.2/13-478) defines whether the internal
CANCLK is connected to the output of a crystal oscillator (oscillator clock) or to the bus clock.
The clock source has to be chosen such that the tight oscillator tolerance requirements (up to 0.4%) of the
CAN protocol are met. Additionally, for high CAN bus rates (1 Mbps), a 45% to 55% duty cycle of the
clock is required.
If the bus clock is generated from a PLL, it is recommended to select the oscillator clock rather than the
bus clock due to jitter considerations, especially at the faster CAN bus rates.
Bus Clock
Oscillator Clock
MSCAN
CANCLK
CLKSRC
CLKSRC
Prescaler
(1 .. 64)
Time quanta clock (Tq)
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For microcontrollers without a clock and reset generator (CRG), CANCLK is driven from the crystal
oscillator (oscillator clock).
A programmable prescaler generates the time quanta (Tq) clock from CANCLK. A time quantum is the
atomic unit of time handled by the MSCAN.
Eqn. 13-2
A bit time is subdivided into three segments as described in the Bosch CAN 2.0A/B specification. (see
Figure 13-44):
SYNC_SEG: This segment has a fixed length of one time quantum. Signal edges are expected to
happen within this section.
Time Segment 1: This segment includes the PROP_SEG and the PHASE_SEG1 of the CAN
standard. It can be programmed by setting the parameter TSEG1 to consist of 4 to 16 time quanta.
Time Segment 2: This segment represents the PHASE_SEG2 of the CAN standard. It can be
programmed by setting the TSEG2 parameter to be 2 to 8 time quanta long.
Eqn. 13-3
Figure 13-44. Segments within the Bit Time
Tq
fCANCLK
Prescaler valueÞ
--------------------------------------------------------=
Bit Rate fTq
number of Time QuantaÞÞ Þ
---------------------------------------------------------------------------------------------=Þ
SYNC_SEG Time Segment 1 Time Segment 2
1 4 ... 16 2 ... 8
8 ... 25 Time Quanta
= 1 Bit Time
NRZ Signal
Sample Point
(single or triple sampling)
(PROP_SEG + PHASE_SEG1) (PHASE_SEG2)
Transmit Point
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The synchronization jump width (see the Bosch CAN 2.0A/B specification for details) can be programmed
in a range of 1 to 4 time quanta by setting the SJW parameter.
The SYNC_SEG, TSEG1, TSEG2, and SJW parameters are set by programming the MSCAN bus timing
registers (CANBTR0, CANBTR1) (see Section 13.3.2.3, “MSCAN Bus T iming Register 0 (CANBTR0)
and Section 13.3.2.4, “MSCAN Bus Timing Register 1 (CANBTR1)”).
Table 13-36 gives an overview of the Bosch CAN 2.0A/B specification compliant segment settings and
the related parameter values.
NOTE
It is the users responsibility to ensure the bit time settings are in compliance
with the CAN standard.
13.4.4 Modes of Operation
13.4.4.1 Normal System Operating Modes
The MSCAN module behaves as described within this specification in all normal system operating modes.
Write restrictions exist for some registers.
Table 13-35. Time Segment Syntax
Syntax Description
SYNC_SEG System expects transitions to occur on the CAN bus during this
period.
Transmit Point A node in transmit mode transfers a new value to the CAN bus at
this point.
Sample Point
A node in receive mode samples the CAN bus at this point. If the
three samples per bit option is selected, then this point marks the
position of the third sample.
Table 13-36. Bosch CAN 2.0A/B Compliant Bit Time Segment Settings
Time Segment 1 TSEG1 Time Segment 2 TSEG2 Synchronization
Jump Width SJW
5 .. 10 4 .. 9 2 1 1 .. 2 0 .. 1
4 .. 11 3 .. 10 3 2 1 .. 3 0 .. 2
5 .. 12 4 .. 11 4 3 1 .. 4 0 .. 3
6 .. 13 5 .. 12 5 4 1 .. 4 0 .. 3
7 .. 14 6 .. 13 6 5 1 .. 4 0 .. 3
8 .. 15 7 .. 14 7 6 1 .. 4 0 .. 3
9 .. 16 8 .. 15 8 7 1 .. 4 0 .. 3
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13.4.4.2 Special System Operating Modes
The MSCAN module behaves as described within this specification in all special system operating modes.
Write restrictions which exist on specific registers in normal modes are lifted for test purposes in special
modes.
13.4.4.3 Emulation Modes
In all emulation modes, the MSCAN module behaves just like in normal system operating modes as
described within this specification.
13.4.4.4 Listen-Only Mode
In an optional CAN bus monitoring mode (listen-only), the CAN node is able to receive valid data frames
and valid remote frames, but it sends only “recessive” bits on the CAN bus. In addition, it cannot start a
transmission.
If the MAC sub-layer is required to send a “dominant” bit (ACK bit, overload flag, or active error flag),
the bit is rerouted internally so that the MAC sub-layer monitors this “dominant” bit, although the CAN
bus may remain in recessive state externally.
13.4.4.5 MSCAN Initialization Mode
The MSCAN enters initialization mode when it is enabled (CANE=1).
When entering initialization mode during operation, any on-going transmission or reception is
immediately aborted and synchronization to the CAN bus is lost, potentially causing CAN protocol
violations. To protect the CAN bus system from fatal consequences of violations, the MSCAN
immediately drives TXCAN into a recessive state.
NOTE
The user is responsible for ensuring that the MSCAN is not active when
initialization mode is entered. The recommended procedure is to bring the
MSCAN into sleep mode (SLPRQ = 1 and SLPAK = 1) before setting the
INITRQ bit in the CANCTL0 register. Otherwise, the abort of an on-going
message can cause an error condition and can impact other CAN bus
devices.
In initialization mode, the MSCAN is stopped. However , interface registers remain accessible. This mode
is used to reset the CANCTL0, CANRFLG, CANRIER, CANTFLG, CANTIER, CANT ARQ, CANT AAK,
and CANTBSEL registers to their default values. In addition, the MSCAN enables the configuration of the
CANBTR0, CANBTR1 bit timing registers; CANIDAC; and the CANIDAR, CANIDMR message filters.
See Section 13.3.2.1, “MSCAN Control Register 0 (CANCTL0),” for a detailed description of the
initialization mode.
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Figure 13-45. Initialization Request/Acknowledge Cycle
Due to independent clock domains within the MSCAN, INITRQ must be synchronized to all domains by
using a special handshake mechanism. This handshake causes additional synchronization delay (see
Figure 13-45).
If there is no message transfer ongoing on the CAN bus, the minimum delay will be two additional bus
clocks and three additional CAN clocks. When all parts of the MSCAN are in initialization mode, the
INITAK flag is set. The application software must use INITAK as a handshake indication for the request
(INITRQ) to go into initialization mode.
NOTE
The CPU cannot clear INITRQ before initialization mode (INITRQ = 1 and
INITAK = 1) is active.
13.4.5 Low-Power Options
If the MSCAN is disabled (CANE = 0), the MSCAN clocks are stopped for power saving.
If the MSCAN is enabled (CANE = 1), the MSCAN has two additional modes with reduced power
consumption, compared to normal mode: sleep and power down mode. In sleep mode, power consumption
is reduced by stopping all clocks except those to access the registers from the CPU side. In power down
mode, all clocks are stopped and no power is consumed.
Table 13-37 summarizes the combinations of MSCAN and CPU modes. A particular combination of
modes is entered by the given settings on the CSWAI and SLPRQ/SLPAK bits.
SYNC
SYNC
Bus Clock Domain CAN Clock Domain
CPU
Init Request
INIT
Flag
INITAK
Flag
INITRQ
sync.
INITAK
sync.
INITRQ
INITAK
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13.4.5.1 Operation in Run Mode
As shown in Table 13-37, only MSCAN sleep mode is available as low power option when the CPU is in
run mode.
13.4.5.2 Operation in Wait Mode
The WAI instruction puts the MCU in a low power consumption stand-by mode. If the CSWAI bit is set,
additional power can be saved in power down mode because the CPU clocks are stopped. After leaving
this power down mode, the MSCAN restarts and enters normal mode again.
While the CPU is in wait mode, the MSCAN can be operated in normal mode and generate interrupts
(registers can be accessed via background debug mode).
13.4.5.3 Operation in Stop Mode
The STOP instruction puts the MCU in a low power consumption stand-by mode. In stop mode, the
MSCAN is set in power down mode regardless of the value of the SLPRQ/SLPAK and CSWAI bits
(Table 13-37).
13.4.5.4 MSCAN Normal Mode
This is a non-power-saving mode. Enabling the MSCAN puts the module from disabled mode into normal
mode. In this mode the module can either be in initialization mode or out of initialization mode. See
Section 13.4.4.5, “MSCAN Initialization Mode”.
Table 13-37. CPU vs. MSCAN Operating Modes
CPU Mode
MSCAN Mode
Normal
Reduced Power Consumption
Sleep Power Down Disabled
(CANE=0)
RUN
CSWAI = X(1)
SLPRQ = 0
SLPAK = 0
1. ‘X’ means don’t care.
CSWAI = X
SLPRQ = 1
SLPAK = 1
CSWAI = X
SLPRQ = X
SLPAK = X
WAIT
CSWAI = 0
SLPRQ = 0
SLPAK = 0
CSWAI = 0
SLPRQ = 1
SLPAK = 1
CSWAI = 1
SLPRQ = X
SLPAK = X
CSWAI = X
SLPRQ = X
SLPAK = X
STOP
CSWAI = X
SLPRQ = X
SLPAK = X
CSWAI = X
SLPRQ = X
SLPAK = X
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13.4.5.5 MSCAN Sleep Mode
The CPU can request the MSCAN to enter this low power mode by asserting the SLPRQ bit in the
CANCTL0 register. The time when the MSCAN enters sleep mode depends on a fixed synchronization
delay and its current activity:
If there are one or more message buf fers scheduled for transmission (TXEx = 0), the MSCAN will
continue to transmit until all transmit message buffers are empty (TXEx = 1, transmitted
successfully or aborted) and then goes into sleep mode.
•If the MSCAN is receiving, it continues to receive and goes into sleep mode as soon as the CAN
bus next becomes idle.
If the MSCAN is neither transmitting nor receiving, it immediately goes into sleep mode.
Figure 13-46. Sleep Request / Acknowledge Cycle
NOTE
The application software must avoid setting up a transmission (by clearing
one or more TXEx flag(s)) and immediately request sleep mode (by setting
SLPRQ). Whether the MSCAN starts transmitting or goes into sleep mode
directly depends on the exact sequence of operations.
If sleep mode is active, the SLPRQ and SLPAK bits are set (Figure 13-46). The application software must
use SLPAK as a handshake indication for the request (SLPRQ) to go into sleep mode.
When in sleep mode (SLPRQ = 1 and SLPAK = 1), the MSCAN stops its internal clocks. However , clocks
that allow register accesses from the CPU side continue to run.
If the MSCAN is in bus-off state, it stops counting the 128 occurrences of 11 consecutive recessive bits
due to the stopped clocks. TXCAN remains in a recessive state. If RXF = 1, the message can be read and
RXF can be cleared. Shifting a new message into the foreground buf fer of the receiver FIFO (RxFG) does
not take place while in sleep mode.
It is possible to access the transmit buffers and to clear the associated TXE flags. No message abort takes
place while in sleep mode.
SYNC
SYNC
Bus Clock Domain CAN Clock Domain
MSCAN
in Sleep Mode
CPU
Sleep Request
SLPRQ
Flag
SLPAK
Flag
SLPRQ
sync.
SLPAK
sync.
SLPRQ
SLPAK
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If the WUPE bit in CANCTL0 is not asserted, the MSCAN will mask any activity it detects on CAN.
RXCAN is therefore held internally in a recessive state. This locks the MSCAN in sleep mode. WUPE
must be set before entering sleep mode to take effect.
The MSCAN is able to leave sleep mode (wake up) only when:
CAN bus activity occurs and WUPE = 1
or
the CPU clears the SLPRQ bit
NOTE
The CPU cannot clear the SLPRQ bit before sleep mode (SLPRQ = 1 and
SLPAK = 1) is active.
After wake-up, the MSCAN waits for 11 consecutive recessive bits to synchronize to the CAN bus. As a
consequence, if the MSCAN is woken-up by a CAN frame, this frame is not received.
The receive message buffers (RxFG and RxBG) contain messages if they were received before sleep mode
was entered. All pending actions will be executed upon wake-up; copying of RxBG into RxFG, message
aborts and message transmis sions. If the MSCAN remains in bus-of f state after sleep mode was exited, it
continues counting the 128 occurrences of 11 consecutive recessive bits.
13.4.5.6 MSCAN Power Down Mode
The MSCAN is in power down mode (Table 13-37) when
CPU is in stop mode
or
CPU is in wait mode and the CSWAI bit is set
When entering the power down mode, the MSCAN immediately stops all ongoing transmissions and
receptions, potentially causing CAN protocol violations. To protect the CAN bus system from fatal
consequences of violations to the above rule, the MSCAN immediately drives TXCAN into a recessive
state.
NOTE
The user is responsible for ensuring that the MSCAN is not active when
power down mode is entered. The recommended procedure is to bring the
MSCAN into Sleep mode before the STOP or WAI instruction (if CSWAI
is set) is executed. Otherwise, the abort of an ongoing message can cause an
error condition and impact other CAN bus devices.
In power down mode, all clocks are stopped and no registers can be accessed. If the MSCAN was not in
sleep mode before power down mode became active, the module performs an internal recovery cycle after
powering up. This causes some fixed delay before the module enters normal mode again.
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13.4.5.7 Disabled Mode
The MSCAN is in disabled mode out of reset (CANE=0). All module clocks are stopped for power saving,
however the register map can still be accessed as specified.
13.4.5.8 Programmable Wake-Up Function
The MSCAN can be programmed to wake up from sleep or power down mode as soon as CAN bus activity
is detected (see control bit WUPE in MSCAN Control Register 0 (CANCTL0). The sensitivity to existing
CAN bus action can be modified by applying a low-pass filter function to the RXCAN input line (see
control bit WUPM in Section 13.3.2.2, “MSCAN Control Register 1 (CANCTL1)”).
This feature can be used to protect the MSCAN from wake-up due to short glitches on the CAN bus lines.
Such glitches can result from—for example—electromagnetic interference within noisy environments.
13.4.6 Reset Initialization
The reset state of each individual bit is listed in Section 13.3.2, “Register Descriptions,” which details all
the registers and their bit-fields.
13.4.7 Interrupts
This section describes all interrupts originated by the MSCAN. It documents the enable bits and generated
flags. Each interrupt is listed and described separately.
13.4.7.1 Description of Interrupt Operation
The MSCAN supports four interrupt vectors (see Table 13-38), any of which can be individually masked
(for details see Section 13.3.2.6, “MSCAN Receiver Interrupt Enable Register (CANRIER)” to
Section 13.3.2.8, “MSCAN Transmitter Interrupt Enable Register (CANTIER)”).
Refer to the device overview section to determine the dedicated interrupt vector addresses.
13.4.7.2 Transmit Interrupt
At least one of the three transmit buffers is empty (not scheduled) and can be loaded to schedule a message
for transmission. The TXEx flag of the empty message buffer is set.
Table 13-38. Interrupt Vectors
Interrupt Source CCR Mask Local Enable
Wake-Up Interrupt (WUPIF) I bit CANRIER (WUPIE)
Error Interrupts Interrupt (CSCIF, OVRIF) I bit CANRIER (CSCIE, OVRIE)
Receive Interrupt (RXF) I bit CANRIER (RXFIE)
Transmit Interrupts (TXE[2:0]) I bit CANTIER (TXEIE[2:0])
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13.4.7.3 Receive Interrupt
A message is successfully received and shifted into the foreground buffer (RxFG) of the receiver FIFO.
This interrupt is generated immediately after receiving the EOF symbol. The RXF flag is set. If there are
multiple messages in the receiver FIFO, the RXF flag is set as soon as the next message is shifted to the
foreground buffer.
13.4.7.4 Wake-Up Interrupt
A wake-up interrupt is generated if activity on the CAN bus occurs during MSCAN sleep or power-down
mode.
NOTE
This interrupt can only occur if the MSCAN was in sleep mode (SLPRQ = 1
and SLPAK = 1) before entering power down mode, the wake-up option is
enabled (WUPE = 1), and the wake-up interrupt is enabled (WUPIE = 1).
13.4.7.5 Error Interrupt
An error interrupt is generated if an overrun of the receiver FIFO, error, warning, or bus-off condition
occurs. MSCAN Receiver Flag Register (CANRFLG) indicates one of the following conditions:
Overrun — An overrun condition of the receiver FIFO as described in Section 13.4.2.3, “Receive
Structures,” occurred.
CAN Status Change — The actual value of the transmit and receive error counters control the
CAN bus state of the MSCAN. As soon as the error counters skip into a critical range (Tx/Rx-
warning, Tx/Rx-error, bus-off) the MSCAN flags an error condition. The status change, which
caused the error condition, is indicated by the TSTAT and RSTAT flags (see Section 13.3.2.5,
“MSCAN Receiver Flag Register (CANRFLG)” and Section 13.3.2.6, “MSCAN Receiver
Interrupt Enable Register (CANRIER)”).
13.4.7.6 Interrupt Acknowledge
Interrupts are directly associated with one or more status flags in either the MSCAN Receiver Flag
Register (CANRFLG) or the MSCAN Transmitter Flag Register (CANTFLG). Interrupts are pending as
long as one of the corresponding flags is set. The flags in CANRFLG and CANTFLG must be reset within
the interrupt handler to handshake the interrupt. The flags are reset by writing a 1 to the corresponding bit
position. A flag cannot be cleared if the respective condition prevails.
NOTE
It must be guaranteed that the CPU clears only the bit causing the current
interrupt. For this reason, bit manipulation instructions (BSET) must not be
used to clear interrupt flags. These instructions may cause accidental
clearing of interrupt flags which are set after entering the current interrupt
service routine.
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13.5 Initialization/Application Information
13.5.1 MSCAN initialization
The procedure to initially start up the MSCAN module out of reset is as follows:
1. Assert CANE
2. Write to the configuration registers in initialization mode
3. Clear INITRQ to leave initialization mode
If the configuration of registers which are only writable in initialization mode shall be changed:
1. Bring the module into sleep mode by setting SLPRQ and awaiting SLPAK to assert after the CAN
bus becomes idle.
2. Enter initialization mode: assert INITRQ and await INITAK
3. Write to the configuration registers in initialization mode
4. Clear INITRQ to leave initialization mode and continue
13.5.2 Bus-Off Recovery
The bus-off recovery is user configurable. The bus-off state can either be left automatically or on user
request.
For reasons of backwards compatibility, the MSCAN defaults to automatic recovery after reset. In this
case, the MSCAN will become error active again after counting 128 occurrences of 11 consecutive
recessive bits on the CAN bus (see the Bosch CAN 2.0 A/B specification for details).
If the MSCAN is configured for user request (BORM set in MSCAN Control Register 1 (CANCTL1)), the
recovery from bus-off starts after both independent events have become true:
128 occurrences of 11 consecutive recessive bits on the CAN bus have been monitored
BOHOLD in MSCAN Miscellaneous Register (CANMISC) has been cleared by the user
These two events may occur in any order.
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Chapter 14
Programmable Trigger Unit (PTUV3)
14.1 Introduction
In PWM driven systems it is important to schedule the acquisition of the state variables with respect to
PWM cycle.
The Programmable Trigger Unit (PTU) is intended to completely avoid CPU involvement in the time
acquisitions of state variables during the control cycle that can be half, full, multiple PWM cycles.
All acquisition time values are stored inside the global memory ma p, basically inside the system memory;
see the MMC section for the supported memory area. In such cases the pre-setting of the acquisition times
needs to be completed during the previous control cycle to where the actual acquisitions are to be made.
14.1.1 Features
The PTU module includes these distinctive features:
One 16 bit counter as time base for all trigger events
Two independent trigger generators (TG0 and TG1)
Up to 32 trigger events per trigger generator
Table 14-1. Revision History Table
Rev. No.
(Item No.)
Data Sections
Affected Substantial Change(s)
01.00 21 Oct. 2011 all Initial Version
02.00 22. Mar. 2012 14.3.2.1,
14.3.2.7,
14.3.2.10,
14.3.2.14 -
14.3.2.17
- removed PTUWP bit (now: PTUPTR is write protected if both
TGs are disabled, TGxLxIDX is write protected if the associated
TG is disabled)
- TGxLIST bits are writeable if associated TG is disabled
- PTULDOK bit is writable if both TGs are disabled
- TGxLIST swap at every reload with LDOK set
3.0 16. Jul. 2013
minor corrections
Table 14-2. Terminology
Term Meaning
TG Trigger Generator
EOL End of trigger list
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Global Load OK support, to guarantee coherent update of all control loop modules
Trigger values stored inside the global memory map, basically inside system memory
Software generated reload event and Trigger event generation for debugging
14.1.2 Modes of Operation
The PTU module behaves as follows in the system power modes:
1. Run mode
All PTU features are available.
2. Wait mode
All PTU features are available.
3. Freeze Mode
Depends on the PTUFRZ register bit setting the internal counter is stopped and no trigger events
will be generated.
4. Stop mode
The PTU is disabled and the internal counter is stopped; no trigger events will be generated. The
content of the configuration register is unchanged.
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14.1.3 Block Diagram
Figure 14-1 shows a block diagram of the PTU module.
Figure 14-1. PTU Block Diagram
14.2 External Signal Description
This section lists the name and description of all external ports.
14.2.1 PTUT0 — PTU Trigger 0
If enabled (PTUT0PE is set) this pin shows the internal trigger_0 event.
14.2.2 PTUT1 — PTU Trigger 1
If enabled (PTUT1PE is set) this pin shows the internal trigger_1 event.
Trigger Generator (TG0)
Trigger Generator (TG1)
Time Base
Bus Clock
Global Memory Map
PTU
Module A
PTUT0
PTURE
PTUT1
Trigger 1
Trigger 2
...
Trigger n
Trigger 1
Trigger 2
...
Trigger n
Counter
Control Logic
reload
reload_is_async Module B
ptu_reload_is_async
ptu_reload
trigger_1
trigger_0
glb_ldok
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14.2.3 PTURE — PTUE Reload Event
If enabled (PTUREPE is set) this pin shows the internal reload event.
14.3 Memory Map and Register Definition
This section provides the detailed information of all registers for the PTU module.
14.3.1 Register Summary
Figure 14-2 shows the summary of all implemented registers inside the PTU module.
NOTE
Register Address = Module Base Address + Address Offset, where the
Module Base Address is defined at the MCU level and the Address Offset
is defined at the module level.
Address Offset
Register Name Bit 7654321Bit 0
0x0000
PTUE
R0 PTUFRZ 0000
TG1EN TG0EN
W
0x0001
PTUC
R0000000
PTULDOK
W
0x0002
PTUIEH
R0000000
PTUROIE
W
0x0003
PTUIEL
RTG1AEIE TG1REIE TG1TEIE TG1DIE TG0AEIE TG0REIE TG0TEIE TG0DIE
W
0x0004
PTUIFH
R000000
PTUDEEF PTUROIF
W
0x0005
PTUIFL
RTG1AEIF TG1REIF TG1TEIF TG1DIF TG0AEIF TG0REIF TG0TEIF TG0DIF
W
0x0006
TG0LIST
R0000000
TG0LIST
W
0x0007
TG0TNUM
R 0 0 0 TG0TNUM[4:0]
W
0x0008
TG0TVH
R TG0TV[15:8]
W
= Unimplemented
Figure 14-2. PTU Register Summary
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0x0009
TG0TVL
R TG0TV[7:0]
W
0x000A
TG1LIST
R0000000
TG1LIST
W
0x000B
TG1TNUM
R 0 0 0 TG1TNUM[4:0]
W
0x000C
TG1TVH
R TG1TV[15:8]
W
0x000D
TG1TVL
R TG1TV[7:0]
W
0x000E
PTUCNTH
R PTUCNT[15:8]
W
0x000F
PTUCNTL
R PTUCNT[7:0]
W
0x0010
Reserved
R00000000
W
0x0011
PTUPTRH
RPTUPTR[23:16]
W
0x0012
PTUPTRM
RPTUPTR[15:8]
W
0x0013
PTUPTRL
RPTUPTR[7:1] 0
W
0x0014
TG0L0IDX
R 0 TG0L10DX[6:0]
W
0x0015
TG0L1IDX
R0 TG0L1IDX[6:0]
W
0x0016
TG1L0IDX
R0 TG1L0IDX[6:0]
W
0x0017
TG1L1IDX
R0 TG1L1IDX[6:0]
W
Address Offset
Register Name Bit 7654321Bit 0
= Unimplemented
Figure 14-2. PTU Register Summary
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14.3.2 Register Descriptions
This section consists of register descriptions in address order . Each description includes a standard register
diagram with an associated figure number. Details of register bit and field function follow the register
diagrams, in bit order. Unused bits read back zero.
0x0018 - 0x001E
Reserved
R00000000
W
0x001F
PTUDEBUG
R0 PTUREPE PTUT1PE PTUT0PE 0000
WPTUFRE TG1FTE TG0FTE
Address Offset
Register Name Bit 7654321Bit 0
= Unimplemented
Figure 14-2. PTU Register Summary
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14.3.2.1 PTU Module Enable Register (PTUE)
14.3.2.2 PTU Module Control Register (PTUC)
Module Base + 0x0000 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0
PTUFRZ
0000
TG1EN TG0EN
W
Reset 00000000
= Unimplemented
Figure 14-3. PTU Module Enable Register (PTUE)
Table 14-3. PTUE Register Field Description
Field Description
6
PTUFRZ
PTU Stop in Freeze Mode — In freeze mode, there is an option to disable the input clock to the PTU time base
counter. If this bit is set, whenever the MCU is in freeze mode, the input clock to the time base counter is disabled.
In this way, the counters can be stopped while in freeze mode so that once normal program flow is continued, the
counter is re-enabled.
0 Allow time base counter to continue while in freeze mode
1 Disable time base counter clock whenever the part is in freeze mode
1
TG1EN
Trigger Generator 1 Enable — This bit enables trigger generator 1.
0 Trigger generator 1 is disabled
1 Trigger generator 1 is enabled
0
TG0EN
Trigger Generator 0 Enable — This bit enables trigger generator 0.
0 Trigger generator 0 is disabled
1 Trigger generator 0 is enabled
Module Base + 0x0001 Access: User read/write(1)
1. Read: Anytime
Write: write 1 anytime, write 0 if TG0EN and TG1EN is cleared
76543210
R0000000
PTULDOK
W
Reset00000000
= Unimplemented
Figure 14-4. PTU Module Control Register (PTUC)
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Table 14-4. PTUC Register Field Descriptions
Field Description
0
PTULDOK
Load Okay When this bit is set by the software, this allows the trigger generator to switch to the alternative
list and load the trigger time values at the next reload event from the new list. If the reload event occurs when
the PTULDOK bit is not set then the trigger generator generates a reload overrun event and uses the previously
used list. At the next reload event this bit is cleared by control logic. Write 0 is only possible if TG0EN and
TG1EN is cleared.
The PTULDOK can be used by other module as global load OK (glb_ldok).
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14.3.2.3 PTU Interrupt Enable Register High (PTUIEH)
14.3.2.4 PTU Interrupt Enable Register Low (PTUIEL)
Module Base + 0x0002 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0000000
PTUROIE
W
Reset 00000000
= Unimplemented
Figure 14-5. PTU Interrupt Enable Register High (PTUIEH)
Table 14-5. PTUIEH Register Field Descriptions
Field Description
0
PTUROIE
PTU Reload Overrun Interrupt Enable — Enables PTU reload overrun interrupt.
0 No interrupt will be requested whenever PTUROIF is set
1 Interrupt will be requested whenever PTUROIF is set
Module Base + 0x0003 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R
TG1AEIE TG1REIE TG1TEIE TG1DIE TG0AEIE TG0REIE TG0TEIE TG0DIE
W
Reset 00000000
= Unimplemented
Figure 14-6. PTU Interrupt Enable Register Low (PTUIEL)
Table 14-6. PTUIEL Register Field Descriptions
Field Description
7
TG1AEIE
Trigger Generator 1 Memory Access Error Interrupt Enable — Enables trigger generator memory access
error interrupt.
0 No interrupt will be requested whenever TG1AEIF is set
1 Interrupt will be requested whenever TG1AEIF is set
6
TG1REIE
Trigger Generator 1 Reload Error Interrupt Enable — Enables trigger generator reload error interrupt.
0 No interrupt will be requested whenever TG1REIF is set
1 Interrupt will be requested whenever TG1REIF is set
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 534
5
TG1TEIE
Trigger Generator 1 Timing Error Interrupt Enable — Enables trigger generator timing error interrupt.
0 No interrupt will be requested whenever TG1TEIF is set
1 Interrupt will be requested whenever TG1TEIF is set
4
TG1DIE
Trigger Generator 1 Done Interrupt Enable — Enables trigger generator done interrupt.
0 No interrupt will be requested whenever TG1DIF is set
1 Interrupt will be requested whenever TG1DIF is set
3
TG0AEIE
Trigger Generator 0 Memory Access Error Interrupt Enable — Enables trigger generator memory access
error interrupt.
0 No interrupt will be requested whenever TG0AEIF is set
1 Interrupt will be requested whenever TG0AEIF is set
2
TG0REIE
Trigger Generator 0 Reload Error Interrupt Enable — Enables trigger generator reload error interrupt.
0 No interrupt will be requested whenever TG0REIF is set
1 Interrupt will be requested whenever TG0REIF is set
1
TG0TEIE
Trigger Generator 0 Timing Error Interrupt Enable — Enables trigger generator timing error interrupt.
0 No interrupt will be requested whenever TG0TEIF is set
1 Interrupt will be requested whenever TG0TEIF is set
0
TG0DIE
Trigger Generator 0 Done Interrupt Enable — Enables trigger generator done interrupt.
0 No interrupt will be requested whenever TG0DIF is set
1 Interrupt will be requested whenever TG0DIF is set
Table 14-6. PTUIEL Register Field Descriptions
Field Description
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 535
14.3.2.5 PTU Interrupt Flag Register High (PTUIFH)
14.3.2.6 PTU Interrupt Flag Register Low (PTUIFL)
Module Base + 0x0004 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear
76543210
R000000
PTUDEEF PTUROIF
W
Reset 00000000
= Unimplemented
Figure 14-7. PTU Interrupt Flag Register High (PTUIFH)
Table 14-7. PTUIFH Register Field Descriptions
Field Description
1
PTUDEEF
PTU Double bit ECC Error Flag — This bit is set if the read data from the memory contains double bit ECC
errors. While this bit is set the trigger generation of both trigger generators stops.
0 No double bit ECC error occurs
1 Double bit ECC error occurs
0
PTUROIF
PTU Reload Overrun Interrupt Flag — If reload event occurs when the PTULDOK bit is not set then this bit
will be set. This bit is not set if the reload event was forced by an asynchronous commutation event.
0 No reload overrun occurs
1 Reload overrun occurs
Module Base + 0x0005 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear
76543210
R
TG1AEIF TG1REIF TG1EIF TG1DIF TG0AEIF TG0REIF TG0EIF TG0DIF
W
Reset 00000000
= Unimplemented
Figure 14-8. PTU Interrupt Flag Register Low (PTUIFL)
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 536
Table 14-8. PTUIFL Register Field Descriptions
Field Description
7
TG1AEIF
Trigger Generator 1 Memory Access Error Interrupt Flag — This bit is set if trigger generator 1 uses a read
address outside the memory address range, see the MMC section for the supported memory area.
0 No trigger generator 1 memory access error occurs
1 Trigger generator 1 memory access error occurs
6
TG1REIF
Trigger Generator 1 Reload Error Interrupt Flag — This bit is set if a new reload event occurs when the
trigger generator has neither reached the end of list symbol nor the maximum possible triggers. This bit is not
set if the reload event was forced by an asynchronous commutation event.
0 No trigger generator 1 reload error occurs
1 Trigger generator 1 reload error occurs
5
TG1TEIF
Trigger Generator 1 Timing Error Interrupt Flag This bit is set if the trigger generator receives a time value
which is below the current counter value.
0 No trigger generator 1 error occurs
1 Trigger generator 1 error occurs
4
TG1DIF
Trigger Generator 1 Done Interrupt Flag —This bit is set if the trigger generator receives the end of list symbol
or the maximum number of generated trigger events was reached.
0 Trigger generator 1 is running
1 Trigger generator 1 is done
3
TG0AEIF
Trigger Generator 0 Memory Access Error Interrupt Flag — This bit is set if trigger generator 0 uses a read
address outside the memory address range, see the MMC section for the supported memory area.
0 No trigger generator 0 memory access error occurred
1 Trigger generator 0 memory access error occurred
2
TG0REIF
Trigger Generator 0 Reload Error Interrupt Flag — This bit is set if a new reload event occurs when the
trigger generator has neither reached the end of list symbol nor the maximum possible triggers. This bit is not
set if the reload event was forced by an asynchronous commutation event.
0 No trigger generator 0 reload error occurs
1 Trigger generator 0 reload error occurs
1
TG0TEIF
Trigger Generator 0 Timing Error Interrupt Flag This bit is set if the trigger generator receives a time value
which is below the current counter value.
0 No trigger generator 0 error occurs
1 Trigger generator 0 error occurs
0
TG0DIF
Trigger Generator 0 Done Interrupt Flag —This bit is set if the trigger generator receives the end of list symbol
or the maximum number of generated trigger events was reached.
0 Trigger generator 0 is running
1 Trigger generator 0 is done
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 537
14.3.2.7 Trigger Generator 0 List Register (TG0LIST)
14.3.2.8 Trigger Generator 0 Trigger Number Register (TG0TNUM)
Module Base + 0x0006 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, if TG0EN bit is cleared
76543210
R0000000
TG0LIST
W
Reset 00000000
= Unimplemented
Figure 14-9. Trigger Generator 0 List Register (TG0LIST)
Table 14-9. TG0LIST Register Field Descriptions
Field Description
0
TG0LIST
Trigger Generator 0 List — This bit shows the number of the current used list.
0 Trigger generator 0 is using list 0
1 Trigger generator 0 is using list 1
Module Base + 0x0007 Access: User read only(1)
1. Read: Anytime
Write: Never
76543210
R 0 0 0 TG0TNUM[4:0]
W
Reset 00000000
= Unimplemented
Figure 14-10. Trigger Generator 0 Trigger Number Register (TG0TNUM)
Table 14-10. TG0TNUM Register Field Descriptions
Field Description
4:0
TG0TNUM[4:0]
Trigger Generator 0 Trigger Number This register shows the number of generated triggers since the last
reload event. After the generation of 32 triggers this register shows zero. The next reload event clears this
register. See also Figure 14-22.
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 538
14.3.2.9 Trigger Generator 0 Trigger Value (TG0TVH, TG0TVL)
14.3.2.10 Trigger Generator 1 List Register (TG1LIST)
Module Base + 0x0008 Access: User read only(1)
1. Read: Anytime
Write: Never
76543210
RTG0TV[15:8]
W
Reset 00000000
Module Base + 0x0009 Access: User read only
76543210
R TG0TV[7:0]
W
Reset 00000000
= Unimplemented
Figure 14-11. Trigger Generator 0 Trigger Value Register (TG0TVH, TG0TVL)
Table 14-11. TG0TV Register Field Descriptions
Field Description
TG0TV[15:0] Trigger Generator 0 Trigger Value This register contains the trigger value to generate the next trigger. If
the time base counter reach this value the next trigger event is generated. If the trigger generator reached the
end of list (EOL) symbol then this value is visible inside this register. If the last generated trigger was trigger
number 32 then the last used trigger value is visible inside this register. See also Figure 14-22.
Module Base + 0x000A Access: User read/write(1)
1. Read: Anytime
Write: Anytime, if TG1EN bit is cleared
76543210
R0000000
TG1LIST
W
Reset 00000000
= Unimplemented
Figure 14-12. Trigger Generator 1 List Register (TG1LIST)
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 539
Table 14-12. TG1LIST Register Field Descriptions
Field Description
0
TG1LIST
Trigger Generator 1 List — This bit shows the number of the current used list.
0 Trigger generator 1 is using list 0
1 Trigger generator 1 is using list 1
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 540
14.3.2.11 Trigger Generator 1 Trigger Number Register (TG1TNUM)
14.3.2.12 Trigger Generator 1 Trigger Value (TG1TVH, TG1TVL)
Module Base + 0x000B Access: User read only(1)
1. Read: Anytime
Write: Never
76543210
R 0 0 0 TG1TNUM[4:0]
W
Reset00000000
= Unimplemented
Figure 14-13. Trigger Generator 1 Trigger Number Register (TG1TNUM)
Table 14-13. TG1TNUM Register Field Descriptions
Field Description
4:0
TG1TNUM[4:0]
Trigger Generator 1 Trigger Number — This register shows the number of generated triggers since the
last reload event. After the generation of 32 triggers this register shows zero. The next reload event clears
this register. See also Figure 14-22.
Module Base + 0x000C Access: User read only(1)
1. Read: Anytime
Write: Never
76543210
RTG1TV[15:8]
W
Reset 00000000
Module Base + 0x000D Access: User read only
76543210
R TG1TV[7:0]
W
Reset 00000000
= Unimplemented
Figure 14-14. Trigger Generator 1 Trigger Value Register (TG1TVH, TG1TVL)
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 541
Table 14-14. TG1TV Register Field Descriptions
Field Description
TG1TV[15:0] Trigger Generator 1 Next Trigger Value — This register contains the currently used trigger value to generate
the next trigger. If the time base counter reach this value the next trigger event is generated. If the trigger
generator reached the end of list (EOL) symbol then this value is visible inside this register. If the last generated
trigger was trigger number 32 then the last used trigger value is visible inside this register. See also Figure 14-
22.
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 542
14.3.2.13 PTU Counter Register (PTUCNTH, PTUCNTL)
Module Base + 0x000E Access: User read only(1)
1. Read: Anytime
Write: Never
76543210
R PTUCNT[15:8]
W
Reset00000000
Module Base + 0x000F Access: User read only
76543210
R PTUCNT[7:0]
W
Reset 00000000
= Unimplemented
Figure 14-15. PTU Counter Register (PTUCNTH, PTUCNTL)
Table 14-15. PTUCNT Register Field Descriptions
Field Description
PTUCNT[15:0] PTU Time Base Counter value — This register contains the current status of the internal time base counter.
If both TG are done with the execution of the trigger list then the counter also stops. The counter is restarted by
the next reload event.
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 543
14.3.2.14 PTU Pointer Register (PTUPTRH, PTUPTRM, PTUPTRL)
Module Base + 0x0011 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, if TG0En and TG1EN bit are cleared
76543210
R
PTUPTR[23:16]
W
Reset 00000000
Module Base + 0x0012 Access: User read/write
76543210
R
PTUPTR[15:8]
W
Reset 00000000
Module Base + 0x0013 Access: User read/write
76543210
R
PTUPTR[7:1]
0
W
Reset 00000000
= Unimplemented
Figure 14-16. PTU List Add Register (PTUPTRH, PTUPTRM, PTUPTRL)
Table 14-16. PTUPTR Register Field Descriptions
Field Description
PTUPTR
[23:0]
PTU Pointer — This register cannot be modified if TG0EN or TG1EN bit is set. This register defines the start
address of the used list area inside the global memory map. For more information see Section 14.4.2, “Memory
based trigger event list”.
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 544
14.3.2.15 Trigger Generator 0 List 0 Index (TG0L0IDX)
14.3.2.16 Trigger Generator 0 List 1 Index (TG0L1IDX)
Module Base + 0x0014 Access: User read only(1)
1. Read: Anytime
Write: Never
76543210
R 0 TG0L0IDX[6:0]
W
Reset 00000000
= Unimplemented
Figure 14-17. Trigger Generator 0 List 0 Index (TG0L0IDX)
Table 14-17. TG0L0IDX Register Field Descriptions
Field Description
6:0
TG0L0IDX
[6:0]
Trigger Generator 0 List 0 Index Register This register defines offset of the start point for the trigger event
list 0 used by trigger generator 0. This register is read only, so the list 0 for trigger generator 0 will start at the
PTUPTR address. For more information see Section 14.4.2, “Memory based trigger event list”.
Module Base + 0x0015 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, if TG0EN bit is cleared
76543210
R0
TG0L1IDX[6:0]
W
Reset00000000
= Unimplemented
Figure 14-18. Trigger Generator 0 List 1 Index (TG0L1IDX)
Table 14-18. TG0L1IDX Register Field Descriptions
Field Description
6:0
TG0L1IDX
[6:0]
Trigger Generator 0 List 1 Index Register This register cannot be modified after the TG0EN bit is set. This
register defines offset of the start point for the trigger event list 1 used by trigger generator 0. For more
information see Section 14.4.2, “Memory based trigger event list”.
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 545
14.3.2.17 Trigger Generator 1 List 0 Index (TG1L0IDX)
Trigger Generator 1 List 1 Index (TG1L1IDX)
Module Base + 0x0016 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, if TG1EN bit is cleared
76543210
R0
TG1L0IDX[6:0]
W
Reset00000000
= Unimplemented
Figure 14-19. Trigger Generator 1 List 0 Index (TG1L0IDX)
Table 14-19. TG0L1IDX Register Field Descriptions
Field Description
6:0
TG1L0IDX
[6:0]
Trigger Generator 1 List 0 Index Register This register cannot be modified after the TG1EN bit is set. This
register defines offset of the start point for the trigger event list 0 used by trigger generator 1. For more
information see Section 14.4.2, “Memory based trigger event list”.
Module Base + 0x0017 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, if TG1EN bit is cleared
76543210
R0
TG1L1IDX[6:0]
W
Reset00000000
= Unimplemented
Figure 14-20. Trigger Generator 1 List 1 Index (TG1L1IDX)
Table 14-20. TG1L1IDX Register Field Descriptions
Field Description
6:0
TG1L1IDX
[6:0]
Trigger Generator 1 List 1 Index Register This register cannot be modified after the TG1EN bit is set. This
register defines offset of the start point for the trigger event list 1 used by trigger generator 1. For more
information see Section 14.4.2, “Memory based trigger event list”.
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 546
14.3.2.18 PTU Debug Register (PTUDEBUG)
14.4 Functional Description
14.4.1 General
The PTU module consists of two trigger generators (TG0 and TG1). For each TG a separate enable bit is
available, so that both TGs can be enabled independently.
If both trigger generators are disabled then the PTU is disabled, the trigger generation stops and the
memory accesses are disabled.
Module Base + 0x001F Access: User read/write(1)
1. Read: Anytime
Write: only in special mode
76543210
R0
PTUREPE PTUT1PE PTUT0PE
0000
WPTUFRE TG1FTE TG0FTE
Reset00000000
= Unimplemented
Figure 14-21. PTU Debug Register (PTUDEBUG)
Table 14-21. PTUDEBUG Register Field Descriptions
Field Description
6
PTUREPE
PTURE Pin Enable — This bit enables the output port for pin PTURE.
0 PTURE output port are disabled
1 PTURE output port are enabled
5
PTUT1PE
PTU PTUT1 Pin Enable — This bit enables the output port for pin PTUT1.
0 PTUT1 output port are disabled
1 PTUT1 output port are enabled
4
PTUT0PE
PTU PTUT0 Pin Enable — This bit enables the output port for pin PTUT0.
0 PTUT0 output port are disabled
1 PTUT0 output port are enabled
2
PTUFRE
Force Reload event generation — If one of the TGs is enabled then writing 1 to this bit will generate a reload
event. The reload event forced by PTUFRE does not set the PTUROIF interrupt flag. Also the ptu_reload signal
asserts for one bus clock cyclet. Writing 0 to this bit has no effect. Always reads back as 0. This behavior is not
available during stop or freeze mode.
1
TG1FTE
Trigger Generator 1 Force Trigger Event If TG1 is enabled then writing 1 to this bit will generate a trigger
event independent on the list based trigger generation. Writing 0 to this bit has no effect. Always reads back as
0.This behavior is not available during stop or freeze mode.
0
TG0FTE
Trigger Generator 0 Force Trigger Event If TG0 is enabled then writing 1 to this bit will generate a trigger
event independent on the list based trigger generation. Writing 0 to this bit has no effect. Always reads back as
0. This behavior is not available during stop or freeze mode.
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 547
The trigger generation of the PTU module is synchronized to the incoming reload event. This reload event
resets and restarts the inter nal time base counter and makes sure that the firs t trigger value from the actual
trigger list is loaded. Furthermore the corresponding module is informed that a new control cycle has
started.
If the counter value matches the current trigger value then a trigger event is generated. In this way, the
reload event is delayed by the number of bus clock cycles defined by the current trigger value. After this,
a new trigger value is loaded from the memory and the TG waits for the next match. So up to 32 trigger
events per control cycle can be generated. If the trigger value is 0x0000 or 32 trigger events have been
generated during this control cycle, the TGxDIF bit is set and the TG waits for the next reload event.
Figure 14-22 shows an example of the trigger generation using the trigger values shown in Figure 14-23.
Figure 14-22. TG0 trigger generation example
NOTE
If the trigger list contains less than 32 trigger values a delay between the
generation of the last trigger and the assertion of the done interrupt flag will
be visible. During this time the PTU loads the next trigger value from the
memory to evaluate the EOL symbol.
t
Delay T0
Delay T1
Delay T2
Control Cycle
PTUCNT
TG0LIST
TG0TNUM
01230
T0 T1 T2 0x0000
TG0DIF
T0
outgoing trigger events
TG0TV
reload event reload event
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 548
14.4.2 Memory based trigger event list
The lists with the trigger values are located inside the global memory ma p. The location of the trigger lists
in the memory map is configured with registers PTUPTR and TGxLxIDX. If one of the TGs is enabled
then the PTUPTR register is locked. If the TG is enabled then the associated TGxLxIDX registers are
locked.
The trigger values inside the trigger list are 16 bit values. Each 16 bit value defines the delay between the
reload event and the trigger event in bus clock cycles. A delay value of 0x0000 will be interpreted as End
Of trigger List (EOL) symbol. The list must be sorted in ascending order. If a subsequent value is smaller
than the previous value or the loaded trigger value is smaller than the current counter value then the
TGxTEIF error indication is generated and the trigger generation of this list is stopped until the next reload
event. For more information about these error scenario see Section 14.4.5.5, “Trigger Generator Timing
Error”.
The module is not able to access memory area outside the 256 byte window starting at the memory address
defined by PTUPTR.
Figure 14-23. Global Memory map usage
Delay T0
Delay T1
Delay T2
0x0000 (EOL symbol)
unused
Delay T0
Delay T1
Delay T2
0x0000 (EOL symbol)
unused
Delay T0
Delay T1
0x0000 (EOL symbol)
unused
Delay T0
Delay T1
0x0000 (EOL symbol)
unused
0x00_0000
PTUPTR + TG0L0IDX
Global Memory Map
PTUPTR + TG0L1IDX
PTUPTR + TG1L0IDX
PTUPTR + TG1L1IDX
start address TG0 trigger event list 0
start address TG0 trigger event list 1
start address TG1 trigger event list 0
start address TG1 trigger event list 1
max accessible
memory area: 256 byte
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 549
14.4.3 Reload mechanism
Each trigger generator uses two lists to load the trigger values from the memory. One list can be updated
by the CPU while the other list is used to generate the trigger events. After enabling, the TG uses the lists
in alternate order. When the update of alternate trigger list is done, the SW must set the PTULDOK bit. If
the load OK bit is set at the time of reload event, the TG switches to the alternate list and loads the first
trigger value from this trigger event list. The reload event clears the PTULDOK bit.
The TG0LIST and TG1LIST bits shows the currently use list number. These bits are writeable if the
associated TG is disabled.
If the PTULDOK bit was not set before the reload event then the reload overrun error flag is set
(PTUROIF)and both TGs do not switch to the alternative list. The current trigger list is used to load the
trigger values. Figure 14-24 shows an example. The PTULDOK bit can be used by other modules as
glb_ldok.
To reduce the used memory size, it is also possible to set TG0L0IDX equal to TG0L1IDX or to set
TG1L0IDX equal to TG1L1IDX. In this case the trigger generator is using only one physical list of trigger
events even if the trigger generator logic is switching between both pointers. The SW must make sure, that
the CPU does not update the trigger list before the execution of the trigger list is done. The time window
to update the trigger lis t starts at the trigger generator done interrupt flag (TGxDIF) and ends with the next
reload event. Even if only one physical trigger event list is used the TGxLIST shows a swap between list
0 and 1 at every reload event with set PTULDOK bit.
Figure 14-24. TG0 Reload behavior with local PTULDOK
14.4.4 Async reload event
If the reload and reload_is_async are active at the same time then an async reload event happens. The PTU
behavior on an async reload event is the same like on the reload event described in Section 14.4.3, “Reload
PTULDOK
TG0LIST
PTUROIF
set by SW
switch to new list index
PTULDOK bit was not
stay at current list index
set by CPU
set reload overrun error flag
TG0DIF TG0DIF
reload event
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 550
mechanism” above. The only difference is, that during an async reload event the error interrupt flags
PTUROIF and TGxREIF are not generated.
14.4.5 Interrupts and error handling
This section describes the interrupts generated by the PTU module and their individual sources, Vector
addresses and interrupt priority are defined by MCU level.
14.4.5.1 PTU Double Bit ECC Error
If one trigger generator reads trigger values from the memory which contains double bit ECC errors then
the PTUDEEF is set. These read data are ignored and the execution of both trigger generators is stopped
until the PTUDEEF flag was cleared. T o make sure the trigger generator starts in a define state it is required
to execute follow sequence:
1. disable both trigger generators
2. configure the PTU if required
3. clear the PTUDEEF
4. enable the desired trigger generators
14.4.5.2 PTU Reload Overrun Error
If the PTULDOK bit is not set during the reload event then the PTUROIF bit is set. If enabled (PTUROIE
is set) an interrupt is generated. For more information see Section 14.4.3, “Reload mechanism”. During an
async reload event the PTUROIF interrupt flag is not set.
14.4.5.3 Trigger Generator Memory Access Error
The trigger generator memory access error flag (TGxAEIF) is set if the used read address is outside the
accessible memory address area; see the MMC section for the supported memory area. The loaded trigger
values are ignored and the execution of this trigger list is stopped until the next reload event. If enabled
(TGxAEIE is set) an interrupt will be generated.
14.4.5.4 Trigger Generator Reload Error
The trigger generator reload error flag (TGxREIF) is set if a new reload event occurs before the trigger
generator reaches the EOL symbol or the maximum number of generated triggers. Independent of this
Table 14-22. PTU Interrupt Sources
Module Interrupt Sources Local Enable
PTU Reload Overrun Error PTUIEH[PTUROIE]
TG0 Error PTUIEL[TG0AEIE,TG0REIE,TG0TEIE]
TG1 Error PTUIEL[TG1AEIE,TG1REIE,TG1TEIE]
TG0 Done PTUIEL[TG0DIE]
TG1 Done PTUIEL[TG1DIE]
Chapter 14 Programmable Trigger Unit (PTUV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 551
error condition the trigger generator reloads the new data from the trigger list and starts to generate the
trigger. During an async reload event the TGxREIF interrupt flag is not set.
If the trigger value loaded from the memory contains double bit ECC errors (PTUDEEF flag is set) then
the data is ignored and the trigger generator reload error flag (TGxREIF) is not set.
14.4.5.5 Trigger Generator Timing Error
The PTU module requires a defined number of bus clock cycle to load the next trigger value from the
memory . This load time defines the minimum possible distance between consecutive trigger values within
one trigger list or the distance between the reload event and th e first trigger value. If a smaller dis tance is
used then it is possible, depending on device conditions, that the TGxTEIF event is generated. To evaluate
the TGxTEIF handling a distance of 1 should be used. This value will generate the TGxTEIF condition
independent from the device conditions.
For the specification of this number, please see the Device Overview chapter.
The trigger generator timing error flag (TGxTEIF) is set if the loaded trigger value is smaller than the
current counter value. The execution of this trigger list is stopped until the next reload event. There are
different reasons for the trigger generator error condition:
reload time exceeds time of next trigger event
reload time exceeds the time between two consecutive trigger values
a subsequent trigger value is smaller than the predecessor trigger value
If the trigger value loaded from the memory contains double bit ECC errors (PTUDEEF flag is set) then
the data are ignored and the trigger generator timing error flag (TGxTEIF) is not set.
If enabled (TGxEIE is set) an interrupt will be generated.
14.4.5.6 Trigger Generator Done
The trigger generator done flag (TGxDIF) is set if the loaded trigger value contains 0x0000 or if the
number of maximum trigger events (32) was reached. Please note, that the time which is required to load
the next trigger value defines the delay between the generation of the last trigger and the assertion of the
done flag. If enabled (TGxDIE is set) an interrupt is generated.If the trigger value loaded from the memory
contains double bit ECC errors (PTUDEEF flag is set) then the data are ignored and the trigger generator
done flag (TGxDIF) is not set.
14.4.6 Debugging
To see the internal status of the trigger generator the register TGxLIST, TGxTNUM, and TGxTV can be
used. The TGxLIST register shows the number of currently used list. The TGxTNUM shows the number
of generated triggers since the last reload event. If the maximum number of triggers was generated then
this register shows zero. The trigger value loaded from the memory to generate the next trigger event is
visible inside the TGxTV register. If the execution of the trigger list is done then these registers are
unchanged until the next reload event. The next PWM reload event clears the TGxTNUM register and
toggles the used trigger list if PTULDOK was set.
Chapter 14 Programmable Trigger Unit (PTUV3)
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To generate a reload event or trigger event independent from the PWM status the debug register bits
PTUFRE or TGxFTE can be used. A write one to this bits will generate the associated event.This behavior
is not available during stop or freeze mode.
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Chapter 15
Pulse Width Modulator with Fault Protection (PMF15B6CV4)
Table 15-1. Revision History
Glossary
Rev. No.
(Item No.)
Date
(Submitted By)
Sections
Affected Substantial Change(s)
V03.22 02 Sep 2013 15.3.2.4/15-567
15.3.2.11/15-572
Corrected PINVx bit descriptions
Improved read description of PMFOUTB
V03.23 10 Oct 2013 15.2.8/15-558
15.3.2.18/15-577
15.3.2.22/15-581
15.8.1.1/15-621
Corrected pmf_reload_is_async signal description
Enhanced note at PMFCINV register
Corrected write value limitations for PMFMODx registers
Corrected register write protection bit names
Orthographical corrections after review
V03.24 08 Nov 2013 15.3.2.8/15-570
Table 15-14
15.4.7/15-605
Updated PMFFIF bit description
Updated note to QSMP table
Updated Asymmetric PWM output description
Replaced ‘fault clearing’ with ‘fault recovery’ to avoid ambiguity with flags
Various minor corrections.
V03.25 03 Dec 2013 15.3.2.18/15-577 Updated note at PMFCINV register
V04.00 03 Dec 2013 15.3.2.3/15-566
15.3.2.11/15-572
15.3.2.18/15-577
Added write protection to REV1-0 bits (WP)
Added PWM read through PMFOUTB (generator output read option)
Updated note at CINVn bits
Table 15-2. Glossary of Terms
Term Definition
Set Discrete signal is in active logic state.
Clear A discrete signal is in inactive logic state.
Pin External physical connection.
Signal Electronic construct whose state or change in state conveys information.
PWM active state
Normal output
Positive polarity
PWM logic level high causing external power device to conduct
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
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15.1 Introduction
The Pulse width Modulator with Fault protection (PMF) module can be configured for one, two, or three
complementary pairs. For example:
One complementary pair and four independent PWM outputs
Two complementary pairs and two independent PWM outputs
Three complementary pairs and zero independent PWM outputs
Zero complementary pairs and six independent PWM outputs
All PWM outputs can be generated from the same counter , or each pair can have its own counter for three
independent PWM frequencies. Complementary operation permits programmable deadtime insertion,
distortion correction through current sensing by software, and separate top and bottom output polarity
control. Each counter value is programmable to support a continuously variable PWM frequency. Both
edge- and center-aligned synchronous pulse width-control and full range modulation from 0 percent to 100
percent, are supported. The PMF is capable of controlling most motor types: AC induction motors
(ACIM), both brushless (BLDC) and brush DC motors (BDC), switched (SRM) and variable reluctance
motors (VRM), and stepper motors.
15.1.1 Features
Three complementary PWM signal pairs, or six independent PWM signals
Edge-aligned or center-aligned mode
PWM inactive
or disabled state
Inverted output
Negative polarity
PWM logic level low causing external power device not to conduct
PWM clock Clock supplied to PWM and deadtime generators. Based on core clock. Rate depends on prescaler setting.
PWM cycle PWM period determined by modulus register and PWM clock rate. Note the differences in edge- or center-
aligned mode.
PWM reload cycle A.k.a. control cycle. Determined by load frequency which is 1 to n-times the PWM cycle. PWM reload cycle
triggered double-buffered registers take effect at the next PWM reload event.
Commutation cycle For 6-step motor control only. Started by an event external to the PMF module (async_event). This may be
a delayed Hall effect or back-EMF zero crossing event determining the rotor position. Commutation cycle
triggered double-buffered registers take effect at the next commutation event and optionally the PWM
counters are restarted.
Index xRelated to time bases. x = A, B or C
Index nRelated to PWM channels. n = 0, 1, 2, 3, 4, or 5
Index mRelated to fault inputs. m = 0, 1, 2, 3, 4, or 5
Table 15-2. Glossary of Terms
Term Definition
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Features of complementary channel operation:
Deadtime insertion
Separate top and bottom pulse width correction via current status inputs or software
Three variants of PWM output:
Asymmetric in center-aligned mode
Variable edge placement in edge-aligned mode
Double switching in center-aligned mode
Three 15-bit counters based on core clock
Separate top and bottom polarity control
Half-cycle reload capability
Integral reload rates from 1 to 16
Programmable fault protection
Link to timer output compare for 6-step BLDC commutation support with optional counter restart
Reload overrun interrupt
PWM compare output polarity control Software-controlled PWM outputs, complementary or
independent
15.1.2 Modes of Operation
Care must be exercised when using this module in the modes listed in Table 15-3. Some applications
require regular software updates for proper operation. Failure to do so could result in destroying the
hardware setup. Because of this, PWM outputs are placed in their inactive states in STOP mode, and
optionally under WAIT and FREEZE modes. PWM outputs will be reactivated (assuming they were active
to begin with) when these modes are exited.
Table 15-3. Modes When PWM Operation is Restricted
Mode Description
STOP PWM outputs are disabled
WAIT PWM outputs are disabled as a function of the PMFWAI bit
FREEZE PWM outputs are disabled as a function of the PMFFRZ bit
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15.1.3 Block Diagram
Figure 15-1 provides an overview of the PMF module.
Figure 15-1. PMF Block Diagram
PMFDTM
REGISTER
REGISTERS
PMFMOD
PWMRIE
PWMEN
LDOK
EDGE
OUTCTL0
OUT0
PRESCALER
PWM0
PWM1
PWM2
PWM3
PWM4
PWM5
PWM
INTERRUPT
CONTROL
FAULT
CORE
REGISTERS
PMFVAL0-5
PMFCNT
REGISTERS
CLOCK
GENERATORS
MUX,
SWAP &
CURRENT
SENSE
OUT2
OUT4
PROTECTION
FAULT3
FAULT0
FAULT1
FAULT2
REGISTERS
PMFDMAP POLARITY
CONTROL
FAULT
PIN
FILTERS
FIF0
PWMRF RELOAD A INTERRUPT REQUEST
FAULT0-5 INTERRUPT REQUEST
ISENS
FIF0-5
FIE0-5
FMOD0
FMOD1
FMOD2
FMOD3
REGISTER
PMFFEN
FIF2
FIF1
FIF3
LDFQ OUTCTL2
OUTCTL4
OUTCTL1
OUT1
OUT3
OUT5
OUTCTL3
OUTCTL5
HALF
PWMRF
INDEP
TOPNEG
BOTNEG
TOP/BOTTOM
GENERATION
IPOL
DT 0—5
6
IS0 IS1 IS2
MULTIPLE REGISTERS OR BITS
FOR TIMEBASE A, B, OR C
A,B,C
MTG
RELOAD B INTERRUPT REQUEST
RELOAD C INTERRUPT REQUEST
QSMP0
QSMP2
QSMP1
QSMP3
DEADTIME
INSERTION
PRSC
RSTRT
Reset
Single-underline denotes buffered registers taking effect at PWM reload (pmf_reloada,b,c)
Double-underline denotes buffered registers taking effect at commutation event (async_event)
PMFROIF
PMFROIE
RELOAD OVERRUN A or B or C INTERRUPT REQUEST
FMOD4
FAULT4
FIF4 QSMP4
FMOD5
FIF5 QSMP5
FAULT5
pmf_reloada,b,c (PWM reload)
pmf_reload_is_async (PWM reload qualifier)
PINVA,B,C
PRSCA,B,C
PECA,B,C
PMFMODA,B,C
PMFVAL0-5
(Global load OK)
glb_ldok
(Commutation Event)
async_event OUTCTL0-5
OUTC0-5
MSK0-5
pmf_reloada,b,c
(PWM reload)
async_event
with restart
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15.2 Signal Descriptions
If the signals are not used exclusively internally, the PMF has external pins named PWM0–5, FAULT0–5,
and IS0–IS2. Refer to device overview section.
15.2.1 PWM0–PWM5 Pins
PWM0–PWM5 are the output signals of the six PWM channels.
NOTE
On MCUs with an integrated gate drive unit the PWM outputs are connected
internally to the GDU inputs. In these cases the PWM signals may
optionally be available on pins for monitoring purposes. Refer to the device
overview section for routing options and pin locations.
15.2.2 FAULT0–FAULT5 Pins
FAULT0–FAULT5 are input signals for disabling selected PWM outputs (FAULT0-3) or drive the outputs
to a configurable active/inactive state (FAULT4-5).
NOTE
On MCUs with an integrated gate drive unit (GDU) either one or more
FAULT inputs may be connected internally or/and available on an external
pin. Refer to the device overview section for availability and pin locations.
15.2.3 IS0–IS2 Pins
IS0–IS2 are current status signals for top/bottom pulse width correction in complementary channel
operation while deadtime is asserted.
NOTE
Refer to the device overview section for signal availability on pins.
15.2.4 Global Load OK Signal — glb_ldok
This device-internal PMF input signal is connected to the global load OK bit at integration level. For each
of the three PWM generator time bases the use of the global load OK input can be enabled individually
(GLDOKA,B,C).
15.2.5 Commutation Event Signal — async_event
This device-internal PMF input signal is connected to the source of the asynchronous event generator
(preferably timer output compare channel) at integration level.
The commutation event input must be enabled to take effect (ENCE=1). When this bit is set the
PMFOUTC, PMFOUT, and MSKx registers switch from non-buffered to async_event triggered double
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buffered mode. In addition, if restart is enabled (RSTRTx=1), the commutation event generates both
“PWM reload event” and “PWM reload-is-asynchronous event” simultaneously.
15.2.6 Commutation Event Edge Select Signal —
async_event_edge_sel[1:0]
These device-internal PMF input signals select the active edge for the async_event input. Refer to the
device overview section to determine if the selection is user configurable or tied constant at integration
level.
Table 15-4. Commutation Event Edge Selection
15.2.7 PWM Reload Event Signals — pmf_reloada,b,c
These device-internal PMF output signals assert once per control cycle and can serve as triggers for other
implemented IP modules. Signal pmf_reloadb and pmf_reloadc are related to time base B and C,
respectively, while signal pmf_reloada is off out of reset and can be programmed for time b ase A, B, or C.
Refer to the device overview section to determine the signal connections.
15.2.8 PWM Reload-Is-Asynchronous Signal — pmf_reload_is_async
This device-internal PMF output signal serves as a qualifier to the PMF reload event signal pmf_reloada.
Whenever the async_event signal causes pmf_reloada output to assert also the pmf_reload_is_async
output asserts for the same duration, except if asynchronous event and generated PWM reload event occur
in the same cycle.
async_event_edge-sel[1:0] async_event active edge
00 direct input
01 rising edge
10 falling edge
11 both edges
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15.3 Memory Map and Registers
15.3.1 Module Memory Map
A summary of the registers associated with the PMF module is shown in Figure 15-2. Detailed
descriptions of the registers and bits are given in the subsections that follow.
NOTE
Register Address = Module Base Address + Address Offset, where the
Module Base Address is defined at the MCU level and the Address Offset
is defined at the module level.
Address
Offset
Register
Name Bit 7654321Bit 0
0x0000 PMFCFG0 RWP MTG EDGEC EDGEB EDGEA INDEPC INDEPB INDEPA
W
0x0001 PMFCFG1 R0 ENCE BOTNEGC TOPNEGC BOTNEGB TOPNEGB BOTNEGA TOPNEGA
W
0x0002 PMFCFG2 RREV1 REV0 MSK5 MSK4 MSK3 MSK2 MSK1 MSK0
W
0x0003 PMFCFG3 RPMFWAI PMFFRZ 0VLMODE PINVC PINVB PINVA
W
0x0004 PMFFEN R0 FEN5 0FEN4 FEN3 FEN2 FEN1 FEN0
W
0x0005 PMFFMOD R0 FMOD5 0FMOD4 FMOD3 FMOD2 FMOD1 FMOD0
W
0x0006 PMFFIE R0 FIE5 0FIE4 FIE3 FIE2 FIE1 FIE0
W
0x0007 PMFFIF R0 FIF5 0FIF4 FIF3 FIF2 FIF1 FIF0
W
0x0008 PMFQSMP0 R0 0 0 0 QSMP5 QSMP4
W
0x0009 PMFQSMP1 RQSMP3 QSMP2 QSMP1 QSMP0
W
0x000A-
0x000B Reserved R00000000
W
= Unimplemented or Reserved
Figure 15-2. Quick Reference to PMF Registers (Sheet 1 of 5)
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
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0x000C PMFOUTC R0 0OUTCTL5 OUTCTL4 OUTCTL3 OUTCTL2 OUTCTL1 OUTCTL0
W
0x000D PMFOUTB R0 0 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0
W
0x000E PMFDTMS R 0 0 DT5 DT4 DT3 DT2 DT1 DT0
W
0x000F PMFCCTL R0 0 ISENS 0IPOLC IPOLB IPOLA
W
0x0010 PMFVAL0 RPMFVAL0
W
0x0011 PMFVAL0 RPMFVAL0
W
0x0012 PMFVAL1 RPMFVAL1
W
0x0013 PMFVAL1 RPMFVAL1
W
0x0014 PMFVAL2 RPMFVAL2
W
0x0015 PMFVAL2 RPMFVAL2
W
0x0016 PMFVAL3 RPMFVAL3
W
0x0017 PMFVAL3 RPMFVAL3
W
0x0018 PMFVAL4 RPMFVAL4
W
0x0019 PMFVAL4 RPMFVAL4
W
0x001A PMFVAL5 RPMFVAL5
W
Address
Offset
Register
Name Bit 7654321Bit 0
= Unimplemented or Reserved
Figure 15-2. Quick Reference to PMF Registers (Sheet 2 of 5)
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0x001B PMFVAL5 RPMFVAL5
W
0x001C PMFROIE R00000
PMFROIE
C
PMFROIE
B
PMFROIE
A
W
0x001D PMFROIF R00000
PMFROIF
C
PMFROIF
B
PMFROIF
A
W
0x001E PMFICCTL R0 0 PECC PECB PECA ICCC ICCB ICCA
W
0x001F PMFCINV R0 0 CINV5 CINV4 CINV3 CINV2 CINV1 CINV0
W
0x0020 PMFENCA RPWMENA GLDOKA 000
RSTRTA LDOKA PWMRIEA
W
0x0021 PMFFQCA RLDFQA HALFA PRSCA PWMRFA
W
0x0022 PMFCNTA R 0 PMFCNTA
W
0x0023 PMFCNTA R PMFCNTA
W
0x0024 PMFMODA R0 PMFMODA
W
0x0025 PMFMODA RPMFMODA
W
0x0026 PMFDTMA R0 0 0 0 PMFDTMA
W
0x0027 PMFDTMA RPMFDTMA
W
0x0028 PMFENCB RPWMENB GLDOKB 000
RSTRTB LDOKB PWMRIEB
W
0x0029 PMFFQCB RLDFQB HALFB PRSCB PWMRFB
W
Address
Offset
Register
Name Bit 7654321Bit 0
= Unimplemented or Reserved
Figure 15-2. Quick Reference to PMF Registers (Sheet 3 of 5)
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0x002A PMFCNTB R0 PMFCNTB
W
0x002B PMFCNTB R PMFCNTB
W
0x002C PMFMODB R0 PMFMODB
W
0x002D PMFMODB RPMFMODB
W
0x002E PMFDTMB R0 0 0 0 PMFDTMB
W
0x002F PMFDTMB RPMFDTMB
W
0x0030 PMFENCC RPWMENC GLDOKC 000
RSTRTC LDOKC PWMRIEC
W
0x0031 PMFFQCC RLDFQC HALFC PRSCC PWMRFC
W
Address
Offset
Register
Name Bit 7654321Bit 0
= Unimplemented or Reserved
Figure 15-2. Quick Reference to PMF Registers (Sheet 4 of 5)
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
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0x0032 PMFCNTC R 0 PMFCNTC
W
0x0033 PMFCNTC RPMFCNTC
W
0x0034 PMFMODC R0 PMFMODC
W
0x0035 PMFMODC RPMFMODC
W
0x0036 PMFDTMC R0 0 0 0 PMFDTMC
W
0x0037 PMFDTMC RPMFDTMC
W
0x0038 PMFDMP0 RDMP05 DMP04 DMP03 DMP02 DMP01 DMP00
W
0x0039 PMFDMP1 RDMP15 DMP14 DMP13 DMP12 DMP11 DMP10
W
0x003A PMFDMP2 RDMP25 DMP24 DMP23 DMP22 DMP21 DMP20
W
0x003B PMFDMP3 RDMP35 DMP34 DMP33 DMP32 DMP31 DMP30
W
0x003C PMFDMP4 RDMP45 DMP44 DMP43 DMP42 DMP41 DMP40
W
0x003D PMFDMP5 RDMP55 DMP54 DMP53 DMP52 DMP51 DMP50
W
0x003E PMFOUTF R0 0 OUTF5 OUTF4 OUTF3 OUTF2 OUTF1 OUTF0
W
0x003F Reserved R00000000
W
Address
Offset
Register
Name Bit 7654321Bit 0
= Unimplemented or Reserved
Figure 15-2. Quick Reference to PMF Registers (Sheet 5 of 5)
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15.3.2 Register Descriptions
15.3.2.1 PMF Configure 0 Register (PMFCFG0)
Address: Module Base + 0x0000 Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set
76543210
RWP MTG EDGEC EDGEB EDGEA INDEPC INDEPB INDEPA
W
Reset00000000
Figure 15-3. PMF Configure 0 Register (PMFCFG0)
Table 15-5. PMFCFG0 Field Descriptions
Field Description
7
WP
Write Protect— This bit enables write protection to be used for all write-protectable registers. While clear, WP
allows write-protected registers to be written. When set, WP prevents any further writes to write-protected
registers. Once set, WP can be cleared only by reset.
0 Write-protectable registers may be written
1 Write-protectable registers are write-protected
6
MTG
Multiple Timebase Generators This bit determines the number of timebase counters used. This bit cannot
be modified after the WP bit is set.
If MTG is set, PWM generators B and C and registers 0x0028 0x0037 are availabled.The three generators have
their own variable frequencies and are not synchronized.
If MTG is cleared, PMF registers from 0x0028 – 0x0037 can not be written and read zeroes, and bits EDGEC
and EDGEB are ignored. Pair A, Pair B, and Pair C PWMs are synchronized to PWM generator A and use
registers from 0x0020 – 0x0027.
0 Single timebase generator
1 Multiple timebase generators
5
EDGEC
Edge-Aligned or Center-Aligned PWM for Pair C — This bit determines whether PWM4 and PWM5 channels
will use edge-aligned or center-aligned waveforms. This bit has no effect if MTG bit is cleared. This bit cannot be
modified after the WP bit is set.
0 PWM4 and PWM5 are center-aligned PWMs
1 PWM4 and PWM5 are edge-aligned PWMs
4
EDGEB
Edge-Aligned or Center-Aligned PWM for Pair BThis bit determines whether PWM2 and PWM3 channels
will use edge-aligned or center-aligned waveforms. This bit has no effect if MTG bit is cleared. This bit cannot be
modified after the WP bit is set.
0 PWM2 and PWM3 are center-aligned PWMs
1 PWM2 and PWM3 are edge-aligned PWMs
3
EDGEA
Edge-Aligned or Center-Aligned PWM for Pair A— This bit determines whether PWM0 and PWM1 channels
will use edge-aligned or center-aligned waveforms. It determines waveforms for Pair B and Pair C if the MTG bit
is cleared. This bit cannot be modified after the WP bit is set.
0 PWM0 and PWM1 are center-aligned PWMs
1 PWM0 and PWM1 are edge-aligned PWMs
2
INDEPC
Independent or Complementary Operation for Pair CThis bit determines if the PWM channels 4 and 5 will
be independent PWMs or complementary PWMs. This bit cannot be modified after the WP bit is set.
0 PWM4 and PWM5 are complementary PWM pair
1 PWM4 and PWM5 are independent PWMs
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15.3.2.2 PMF Configure 1 Register (PMFCFG1)
A normal PWM output or positive polarity means that the PWM channel outputs high when the counter
value is smaller than or equal to the pulse width value and outputs low otherwise. An inverted output or
negative polarity means that the PWM channel outputs low when the counter value is smaller than or equal
to the pulse width value and outputs high otherwise.
NOTE
The T OPNEGx and BOTNEGx are intended for adapting to the polarity of
external predrivers on devices driving the PWM output directly to pins. If
an integrated GDU is driven it must be made sure to keep the reset values of
these bits in order not to violate the deadtime insertion.
1
INDEPB
Independent or Complementary Operation for Pair BThis bit determines if the PWM channels 2 and 3 will
be independent PWMs or complementary PWMs. This bit cannot be modified after the WP bit is set.
0 PWM2 and PWM3 are complementary PWM pair
1 PWM2 and PWM3 are independent PWMs
0
INDEPA
Independent or Complementary Operation for Pair AThis bit determines if the PWM channels 0 and 1 will
be independent PWMs or complementary PWMs. This bit cannot be modified after the WP bit is set.
0 PWM0 and PWM1 are complementary PWM pair
1 PWM0 and PWM1 are independent PWMs
Address: Module Base + 0x0001 Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set
76543210
R0 ENCE BOTNEGC TOPNEGC BOTNEGB TOPNEGB BOTNEGA TOPNEGA
W
Reset00000000
Figure 15-4. PMF Configure 1 Register (PMFCFG1)
Table 15-6. PMFCFG1 Field Descriptions
Field Description
6
ENCE
Enable Commutation Event — This bit enables the commutation event input and activates buffering of registers
PMFOUTC and PMFOUTB and MSKx bits.This bit cannot be modified after the WP bit is set.If set to zero the
commutation event input is ignored and writes to the above registers and bits will take effect immediately. If set
to one, the commutation event input is enabled and the value written to the above registers and bits does not
take effect until the next commutation event occurs.
0 Commutation event input disabled and PMFOUTC, PMFOUTB and MSKn not buffered
1 Commutation event input enabled and PMFOUTC, PMFOUTB and MSKn buffered
5
BOTNEGC
Pair C Bottom-Side PWM Polarity This bit determines the polarity for Pair C bottom-side PWM (PWM5). This
bit cannot be modified after the WP bit is set.
0 Positive PWM5 polarity
1 Negative PWM5 polarity
Table 15-5. PMFCFG0 Field Descriptions (continued)
Field Description
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15.3.2.3 PMF Configure 2 Register (PMFCFG2)
4
TOPNEGC
Pair C Top-Side PWM Polarity — This bit determines the polarity for Pair C top-side PWM (PWM4). This bit
cannot be modified after the WP bit is set.
0 Positive PWM4 polarity
1 Negative PWM4 polarity
3
BOTNEGB
Pair B Bottom-Side PWM Polarity This bit determines the polarity for Pair B bottom-side PWM (PWM3). This
bit cannot be modified after the WP bit is set.
0 Positive PWM3 polarity
1 Negative PWM3 polarity
2
TOPNEGB
Pair B Top-Side PWM Polarity — This bit determines the polarity for Pair B top-side PWM (PWM2). This bit
cannot be modified after the WP bit is set.
0 Positive PWM2 polarity
1 Negative PWM2 polarity
1
BOTNEGA
Pair A Bottom-Side PWM Polarity This bit determines the polarity for Pair A bottom-side PWM (PWM1). This
bit cannot be modified after the WP bit is set.
0 Positive PWM1 polarity
1 Negative PWM1 polarity
0
TOPNEGA
Pair A Top-Side PWM Polarity — This bit determines the polarity for Pair A top-side PWM (PWM0). This bit
cannot be modified after the WP bit is set.
0 Positive PWM0 polarity
1 Negative PWM0 polarity
Address: Module Base + 0x0002 Access: User read/write(1)
1. Read: Anytime
Write: Anytime except REV[1:0] which cannot be modified after the WP bit is set.
76543210
RREV1 REV0 MSK5 MSK4 MSK3 MSK2 MSK1 MSK0
W
Reset00000000
Figure 15-5. PMF Configure 2 Register (PMFCFG2)
Table 15-7. PMFCFG2 Field Descriptions
Field Description
7-6
REV[1:0]
Select timebase counter to output reload event on pmf_reloada
These bits select if timebase generator A, B or C provides the reload event on output signal pmf_reloada.
This register cannot be modified after the WP bit is set.
00 Reload event generation disabled
01 PWM generator A generates reload event
10 PWM generator B generates reload event
11 PWM generator C generates reload event
Table 15-6. PMFCFG1 Field Descriptions (continued)
Field Description
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 567
WARNING
When using the TOPNEG/BOTNEG bits and the MSKn bits at the same
time, when in complementary mode, it is possible to have both PMF channel
outputs of a channel pair set to one.
15.3.2.4 PMF Configure 3 Register (PMFCFG3)
5–0
MSK[5:0]
Mask PWMn
Note: MSKn are buffered if ENCE is set. The value written does not take effect until the next commutation cycle
begins. Reading MSKn returns the value in the buffer and not necessarily the value the output control is
currently using.
0PWMn is unmasked
1PWMn is masked and the channel is set to a value of 0 percent duty cycle
n is 0, 1, 2, 3, 4, and 5.
Address: Module Base + 0x0003 Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set, except for bits PINVA, PINVB and PINVC
76543210
RPMFWAI PMFFRZ 0VLMODE PINVC PINVB PINVA
W
Reset00000000
Figure 15-6. PMF Configure 3 Register (PMFCFG3)
Table 15-8. PMFCFG3 Field Descriptions
Field Description
7
PMFWAI
PMF Stops While in WAIT ModeWhen set to zero, the PWM generators will continue to run while the chip
is in WAIT mode. In this mode, the peripheral clock continues to run but the CPU clock does not. If the device
enters WAIT mode and this bit is one, then the PWM outputs will be switched to their inactive state until WAIT
mode is exited. At that point the PWM outputs will resume operation as programmed in the PWM registers. This
bit cannot be modified after the WP bit is set.
0 PMF continues to run in WAIT mode
1 PMF is disabled in WAIT mode
6
PMFFRZ
PMF Stops While in FREEZE Mode — When set to zero, the PWM generators will continue to run while the
chip is in FREEZE mode. If the device enters FREEZE mode and this bit is one, then the PWM outputs will be
switched to their inactive state until FREEZE mode is exited. At that point the PWM outputs will resume operation
as programmed in the PWM registers. This bit cannot be modified after the WP bit is set.
0 PMF continues to run in FREEZE mode
1 PMF is disabled in FREEZE mode
4–3
VLMODE
[1:0]
Value Register Load Mode — This field determines the way the value registers are being loaded. This register
cannot be modified after the WP bit is set.
00 Each value register is accessed independently
01 Writing to value register zero also writes to value registers one to five
10 Writing to value register zero also writes to value registers one to three
11 Reserved (defaults to independent access)
Table 15-7. PMFCFG2 Field Descriptions (continued)
Field Description
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
568 Freescale Semiconductor
15.3.2.5 PMF Fault Enable Register (PMFFEN)
2
PINVC
PWM Invert Complement Source Pair C — This bit controls PWM4/PWM5 pair. When set, this bit inverts the
COMPSRCC signal. This bit has no effect in independent mode.
Note: PINVC is buffered. The value written does not take effect until the LDOK bit or global load OK is set and
the next PWM load cycle begins. Reading PINVC returns the value in the buffer and not necessarily the
value in use.
0 No inversion
1 COMPSRCC inverted only in complementary mode
1
PINVB
PWM Invert Complement Source Pair B — This bit controls PWM2/PWM3 pair. When set, this bit inverts the
COMPSRCB signal. This bit has no effect in independent mode.
Note: PINVB is buffered. The value written does not take effect until the LDOK bit or global load OK is set and
the next PWM load cycle begins. Reading PINVB returns the value in the buffer and not necessarily the
value in use.
0 No inversion
1 COMPSRCB inverted only in complementary mode
0
PINVA
PWM Invert Complement Source Pair A — This bit controls PWM0/PWM1 pair. When set, this bit inverts the
COMPSRCA signal. This bit has no effect on in independent mode.
Note: PINVA is buffered. The value written does not take effect until the LDOKA bit or global load OK is set and
the next PWM load cycle begins. Reading PINVA returns the value in the buffer and not necessarily the
value in use.
0 No inversion
1 COMPSRCA inverted only in complementary mode
Address: Module Base + 0x0004 Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set
76543210
R0 FEN5 0FEN4 FEN3 FEN2 FEN1 FEN0
W
Reset00000000
Figure 15-7. PMF Fault Enable Register (PMFFEN)
Table 15-9. PMFFEN Field Descriptions
Field Description
6,4-0
FEN[5:0]
Fault m Enable
This register cannot be modified after the WP bit is set.
0FAULTm input is disabled
1FAULTm input is enabled for fault protection
m is 0, 1, 2, 3, 4 and 5
Table 15-8. PMFCFG3 Field Descriptions (continued)
Field Description
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 569
15.3.2.6 PMF Fault Mode Register (PMFFMOD)
15.3.2.7 PMF Fault Interrupt Enable Register (PMFFIE)
Address: Module Base + 0x0005 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0 FMOD5 0FMOD4 FMOD3 FMOD2 FMOD1 FMOD0
W
Reset00000000
Figure 15-8. PMF Fault Mode Register (PMFFMOD)
Table 15-10. PMFFMOD Field Descriptions
Field Description
6,4-0
FMOD[5:0]
Fault m Pin Recovery Mode — This bit selects automatic or manual recovery of FAULTm input faults. See
Section 15.4.13.2, “Automatic Fault Recovery” and Section 15.4.13.3, “Manual Fault Recovery” for more details.
0 Manual fault recovery of FAULTm input faults
1 Automatic fault recovery of FAULTm input faults
m is 0, 1, 2, 3, 4 and 5.
Address: Module Base + 0x0006 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0 FIE5 0FIE4 FIE3 FIE2 FIE1 FIE0
W
Reset00000000
Figure 15-9. PMF Fault Interrupt Enable Register (PMFFIE)
Table 15-11. PMFFIE Field Descriptions
Field Description
6,4-0
FIE[5:0]
Fault m Pin Interrupt Enable This bit enables CPU interrupt requests to be generated by the FAULTm input.
The fault protection circuit is independent of the FIEm bit and is active when FENm is set. If a fault is detected,
the PWM outputs are disabled or switched to output control according to the PMF Disable Mapping registers.
0FAULTm CPU interrupt requests disabled
1FAULTm CPU interrupt requests enabled
m is 0, 1, 2, 3, 4 and 5.
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
570 Freescale Semiconductor
15.3.2.8 PMF Fault Interrupt Flag Register (PMFFIF)
15.3.2.9 PMF Fault Qualifying Samples Register 0-1 (PMFQSMP0-1)
Address: Module Base + 0x0007 Access: User read/write(1)
1. Read: Anytime
Write: Anytime. Write 1 to clear.
76543210
R0 FIF5 0FIF4 FIF3 FIF2 FIF1 FIF0
W
Reset00000000
Figure 15-10. PMF Fault Interrupt Flag Register (PMFFIF)
Table 15-12. PMFFIF Field Descriptions
Field Description
6,4-0
FIF[5:0]
Fault m Interrupt Flag This flag is set after the required number of samples have been detected after an edge
to the active level
(1) on the FAULTm input. Writing a logic one to FIFm clears it. Writing a logic zero has no effect.
If a set flag is attempted to be cleared and a flag setting event occurs in the same cycle, then the flag remains
set. The fault protection is enabled when FENm is set even when the PWMs are not enabled; therefore, a fault
will be latched in, requiring to be cleared in order to prevent an interrupt.
0 No fault on the FAULTm input
1 Fault on the FAULTm input
Note: Clearing FIFm satisfies pending FIFm CPU interrupt requests.
m is 0, 1, 2, 3, 4 and 5.
1. The active input level may be defined or programmable at SoC level. The default for internally connected resources is active-
high. For availability and configurability of fault inputs on pins refer to the device overview section.
Address: Module Base + 0x0008 Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set.
76543210
R0 0 0 0 QSMP5 QSMP4
W
Reset00000000
Figure 15-11. PMF Fault Qualifying Samples Register (PMFQSMP0)
Address: Module Base + 0x0009 Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set.
76543210
RQSMP3 QSMP2 QSMP1 QSMP0
W
Reset00000000
Figure 15-12. PMF Fault Qualifying Samples Register (PMFQSMP1)
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 571
15.3.2.10 PMF Output Control Register (PMFOUTC)
Table 15-13. PMFQSMP0-1 Field Descriptions
Field Description
7–0
QSMPm[1:0]
Fault m Qualifying Samples — This field indicates the number of consecutive samples taken at the FAULTm
input to determine if a fault is detected. The first sample is qualified after two bus cycles from the time the fault
is present and each sample after that is taken every four core clock cycles. See Table 15-14. This register cannot
be modified after the WP bit is set.
m is 0, 1, 2, 3, 4 and 5.
Table 15-14. Qualifying Samples
QSMPm[1:0] Number of Samples
00 1 sample(1)
1. There is an asynchronous path from fault inputs FAULT3-0, FAULT4 if
DMPn4=b10, and FAULT5 if DMPn5=b10 to disable PWMs
immediately but the fault is qualified in two bus cycles.
01 5 samples
10 10 samples
11 15 samples
Address: Module Base + 0x000C Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0 0 OUTCTL5 OUTCTL4 OUTCTL3 OUTCTL2 OUTCTL1 OUTCTL0
W
Reset00000000
Figure 15-13. PMF Output Control Register (PMFOUTC)
Table 15-15. PMFOUTC Field Descriptions
Field Description
5–0
OUTCTL[5:0]
OUTCTLn Bits — These bits enable software control of their corresponding PWM output. When OUTCTLn is
set, the OUTn bit directly controls the level of the PWMn output.
Note: OUTCTLn is buffered if ENCE is set. The value written does not take effect until the next commutation
cycle begins. Reading OUTCTLn returns the value in the buffer and not necessarily the value the output
control is currently using.
When operating the PWM in complementary mode, these bits must be switched in pairs for proper operation.
That is OUTCTL0 and OUTCTL1 must have the same value; OUTCTL2 and OUTCTL3 must have the same
value; and OUTCTL4 and OUTCTL5 must have the same value.
0 Software control disabled
1 Software control enabled
n is 0, 1, 2, 3, 4 and 5.
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
572 Freescale Semiconductor
15.3.2.11 PMF Output Control Bit Register (PMFOUTB)
a
Table 15-17. Software Output Control
15.3.2.12 PMF Deadtime Sample Register (PMFDTMS)
Address: Module Base + 0x000D Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0 0 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0
W
Reset00000000
Figure 15-14. PMF Output Control Bit Register (PMFOUTB)
Table 15-16. PMFOUTB Field Descriptions
Field Description
5–0
OUT[5:0]
OUTn Bits — If the corresponding OUTCTLn bit is set, these bits control the PWM outputs, illustrated in
Table 15-17.
If the related OUTCTLn=1 a read returns the register contents OUTn else the current PWM output states are
returned
Note: OUTn is buffered if ENCE is set. The value written does not take effect until the next commutation cycle
begins. Reading OUTn (with OUTCTLn=1) returns the value in the buffer and not necessarily the value the
output control is currently using.
n is 0, 1, 2, 3, 4 and 5.
OUTn Bit Complementary
Channel Operation
Independent
Channel Operation
OUT0 1 — PWM0 is active
0 — PWM0 is inactive
1 — PWM0 is active
0 — PWM0 is inactive
OUT1 1 — PWM1 is complement of PWM0
0 — PWM1 is inactive
1 — PWM1 is active
0 — PWM1 is inactive
OUT2 1 — PWM2 is active
0 — PWM2 is inactive
1 — PWM2 is active
0 — PWM2 is inactive
OUT3 1 — PWM3 is complement of PWM2
0 — PWM3 is inactive
1 — PWM3 is active
0 — PWM3 is inactive
OUT4 1 — PWM4 is active
0 — PWM4 is inactive
1 — PWM4 is active
0 — PWM4 is inactive
OUT5 1 — PWM5 is complement of PWM4
0 — PWM5 is inactive
1 — PWM5 is active
0 — PWM5 is inactive
Address: Module Base + 0x000E Access: User read/write(1)
76543210
R 0 0 DT5 DT4 DT3 DT2 DT1 DT0
W
Reset00000000
Figure 15-15. PMF Deadtime Sample Register (PMFDTMS)
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 573
15.3.2.13 PMF Correction Control Register (PMFCCTL)
1. Read: Anytime
Write: Never
Table 15-18. PMFDTMS Field Descriptions
Field Description
5–0
DT[5:0]
DTn Bits — The DTn bits are grouped in pairs, DT0 and DT1, DT2 and DT3, DT4 and DT5. Each pair reflects
the corresponding IS input value as sampled at the end of deadtime.
n is 0, 1, 2, 3, 4 and 5.
Address: Module Base + 0x000F Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0 0 ISENS 0IPOLC IPOLB IPOLA
W
Reset00000000
Figure 15-16. PMF Correction Control Register (PMFCCTL)
Table 15-19. PMFCCTL Field Descriptions
Field Description
5–4
ISENS[1:0]
Current Status Sensing Method — This field selects the top/bottom correction scheme, illustrated in Table 15-
20.
Note: The user must provide current sensing circuitry causing the voltage at the corresponding input to be low
for positive current and high for negative current. The top PWMs are PWM 0, 2, and 4 and the bottom
PWMs are PWM 1, 3, and 5.
Note: The ISENS bits are not buffered. Changing the current status sensing method can affect the present PWM
cycle.
2
IPOLC
Current Polarity This buffered bit selects the PMF Value register for PWM4 and PWM5 in top/bottom software
correction in complementary mode.
0 PMF Value 4 register in next PWM cycle
1 PMF Value 5 register in next PWM cycle
1
IPOLB
Current Polarity This buffered bit selects the PMF Value register for PWM2 and PWM3 in top/bottom software
correction in complementary mode.
0 PMF Value 2 register in next PWM cycle
1 PMF Value 3 register in next PWM cycle
0
IPOLA
Current Polarity This buffered bit selects the PMF Value register for PWM0 and PWM1 in top/bottom software
correction in complementary mode.
0 PMF Value 0 register in next PWM cycle
1 PMF Value 1 register in next PWM cycle
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
574 Freescale Semiconductor
NOTE
The IPOLx bits take effect at the beginning of the next PWM cycle,
regardless of the state of the LDOK bit or global load OK. Select top/bottom
software correction by writing 01 to the current select bits, ISENS[1:0], in
the PWM control register. Reading the IPOLx bits read the buffered value
and not necessarily the value currently in effect.
15.3.2.14 PMF Value 0-5 Register (PMFVAL0-PMFVAL5)
Table 15-20. Correction Method Selection
ISENS Correction Method
00 No correction(1)
1. The current status inputs can be used as general purpose input/output ports.
01 Manual correction
10 Current status sample correction on inputs IS0, IS1, and IS2 during deadtime(2)
2. The polarity of the related IS input is latched when both the top and bottom PWMs are off. At the
0% and 100% duty cycle boundaries, there is no deadtime, so no new current value is sensed.
11 Current status sample on inputs IS0, IS1, and IS2(3)
At the half cycle in center-aligned operation
At the end of the cycle in edge-aligned operation
3. Current is sensed even with 0% or 100% duty cycle.
Address: Module Base + 0x0010 PMFVAL0
Module Base + 0x0012 PMFVAL1
Module Base + 0x0014 PMFVAL2
Module Base + 0x0016 PMFVAL3
Module Base + 0x0018 PMFVAL4
Module Base + 0x001A PMFVAL5
Access: User read/write(1)
1. Read: Anytime
Write: Anytime
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RPMFVALn
W
Reset0000000000000000
Figure 15-17. PMF Value n Register (PMFVALn)
Table 15-21. PMFVALn Field Descriptions
Field Description
15–0
PMFVALnPMF Value n Bits — The 16-bit signed value in this buffered register is the pulse width in PWM clock periods.
A value less than or equal to zero deactivates the PWM output for the entire PWM period. A value greater than,
or equal to the modulus, activates the PWM output for the entire PWM period. See Table 15-39. The terms
activate and deactivate refer to the high and low logic states of the PWM output.
Note: PMFVALn is buffered. The value written does not take effect until the related or global load OK bit is set
and the next PWM load cycle begins. Reading PMFVALn returns the value in the buffer and not necessarily
the value the PWM generator is currently using.
n is 0, 1, 2, 3, 4 and 5.
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 575
15.3.2.15 PMF Reload Overrun Interrupt Enable Register (PMFROIE)
15.3.2.16 PMF Interrupt Flag Register (PMFROIF)
Address: Module Base + 0x001C Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R00000
PMFROIEC PMFROIEB PMFROIEA
W
Reset00000000
Figure 15-18. PMF Interrupt Enable Register (PMFROIE)
Table 15-22. PMFROIE Descriptions
Field Description
2
PMFROIEC
Reload Overrun Interrupt Enable C
0 Reload Overrun Interrupt C disabled
1 Reload Overrun Interrupt C enabled
1
PMFROIEB
Reload Overrun Interrupt Enable B
0 Reload Overrun Interrupt B disabled
1 Reload Overrun Interrupt B enabled
0
PMFROIEA
Reload Overrun Interrupt Enable A
0 Reload Overrun Interrupt A disabled
1 Reload Overrun Interrupt A enabled
Address: Module Base + 0x001D Access: User read/write(1)
1. Read: Anytime
Write: Anytime. Write 1 to clear.
76543210
R00000
PMFROIFC PMFROIFB PMFROIFA
W
Reset00000000
Figure 15-19. PMF Interrupt Flag Register (PMFROIF)
Table 15-23. PMFROIF Field Descriptions
Field Description
2
PMFROIFC
Reload Overrun Interrupt Flag C
If a reload event occurs when the LDOKC or global load OK bit is not set then this flag will be set.
0 No Reload Overrun C occurred
1 Reload Overrun C occurred
1
PMFROIFB
Reload Overrun Interrupt Flag B
If a reload event occurs when the LDOKB or global load OK bit is not set then this flag will be set.
0 No Reload Overrun B occurred
1 Reload Overrun B occurred
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
576 Freescale Semiconductor
15.3.2.17 PMF Internal Correction Control Register (PMFICCTL)
This register is used to control PWM pulse generation for various applications, such as a power-supply
phase-shifting application.
ICCx bits apply only in center-aligned operation during complementary mode. These control bits
determine whether values set in the IPOLx bits control or the whether PWM count direction controls which
PWM value register is used.
NOTE
The ICCx bits are buffered. The value written does not take effect until the
next PWM load cycle begins regardless of the state of the LDOK bit or
global load OK. Reading ICCx returns the value in a buffer and not
necessarily the value the PWM generator is currently using.
The PECx bits apply in edge-aligned and center-aligned operation during complementary mode. Setting
the PECx bits overrides the ICCx settings. This allows the PWM pulses generated by both the odd and even
PWM value registers to be ANDed together prior to the complementary logic and deadtime insertion.
NOTE
The PECx bits are buf fered. The value written does not take ef fect until the
related LDOK bit or global load OK is set and the next PWM load cycle
begins. Reading PECn returns the value in a buffer and not necessarily the
value the PWM generator is currently using.
0
PMFROIFA
Reload Overrun Interrupt Flag A
If PMFCFG2[REV1:REV0]=01 and a reload event occurs when the LDOKA or global load OK bit is not set then
this flag will be set.
If PMFCFG2[REV1:REV0]=10 and a reload event occurs when the LDOKB or global load OK bit is not set then
this flag will be set.
If PMFCFG2[REV1:REV0]=11 and a reload event occurs when the LDOKC or global load OK bit is not set then
this flag will be set.
If PMFCFG2[REV1:REV0]=00 no flag will be generated.
0 No Reload Overrun A occurred
1 Reload Overrun A occurred
Address: Module Base + 0x001E Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0 0 PECC PECB PECA ICCC ICCB ICCA
W
Reset00000000
Figure 15-20. PMF Internal Correction Control Register (PMFICCTL)
Table 15-23. PMFROIF Field Descriptions (continued)
Field Description
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 577
15.3.2.18 PMF Compare Invert Register (PMFCINV)
Figure 15-21. PMF Internal Correction Control Register (PMFICCTL) Descriptions
Field Description
5
PECC
Pulse Edge Control — This bit controls PWM4/PWM5 pair.
0 Normal operation
1 Allow one of PMFVAL4 and PMFVAL5 to activate the PWM pulse and the other to deactivate the pulse
4
PECB
Pulse Edge Control — This bit controls PWM2/PWM3 pair.
0 Normal operation
1 Allow one of PMFVAL2 and PMFVAL3 to activate the PWM pulse and the other to deactivate the pulse
3
PECA
Pulse Edge Control — This bit controls PWM0/PWM1 pair.
0 Normal operation
1 Allow one of PMFVAL0 and PMFVAL1 to activate the PWM pulse and the other to deactivate the pulse
2
ICCC
Internal Correction Control — This bit controls PWM4/PWM5 pair.
0 IPOLC setting determines whether to use the PMFVAL4 or PMFVAL5 register
1 Use PMFVAL4 register when the PWM counter is counting up. Use PMFVAL5 register when counting down.
1
ICCB
Internal Correction Control — This bit controls PWM2/PWM3 pair.
0 IPOLB setting determines whether to use the PMFVAL2 or PMFVAL3 register
1 Use PMFVAL2 register when the PWM counter is counting up. Use PMFVAL3 register when counting down.
0
ICCA
Internal Correction Control — This bit controls PWM0/PWM1 pair.
0 IPOLA setting determines whether to use the PMFVAL0 or PMFVAL1 register
1 Use PMFVAL0 register when the PWM counter is counting up. Use PMFVAL1 register when counting down.
Address: Module Base + 0x001F Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0 0 CINV5 CINV4 CINV3 CINV2 CINV1 CINV0
W
Reset00000000
Figure 15-22. PMF Compare Invert Register (PMFCINV)
Figure 15-23. PMF Compare Invert Register (PMFCINV) Descriptions
Field Description
5
CINV5
PWM Compare Invert 5 This bit controls the polarity of PWM compare output 5. Please see the output operations
in Figure 15-42 and Figure 15-43.
0 PWM output 5 is high when PMFCNTC (PMFCNTA if MTG=0) is less than PMFVAL5
1 PWM output 5 is high when PMFCNTC (PMFCNTA if MTG=0) is greater than PMFVAL5
4
CINV4
PWM Compare Invert 4 This bit controls the polarity of PWM compare output 4. Please see the output operations
in Figure 15-42 and Figure 15-43.
0 PWM output 4 is high when PMFCNTC (PMFCNTA if MTG=0) is less than PMFVAL4
1 PWM output 4 is high when PMFCNTC (PMFCNTA if MTG=0) is greater than PMFVAL4
3
CINV3
PWM Compare Invert 3 This bit controls the polarity of PWM compare output 3. Please see the output operations
in Figure 15-42 and Figure 15-43.
0 PWM output 3 is high when PMFCNTB (PMFCNTA if MTG=0) is less than PMFVAL3
1 PWM output 3 is high when PMFCNTB (PMFCNTA if MTG=0) is greater than PMFVAL3
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
578 Freescale Semiconductor
NOTE
Changing CINVn can affect the present PWM cycle, if the related
PMFVALn is zero.
15.3.2.19 PMF Enable Control A Register (PMFENCA)
2
CINV2
PWM Compare Invert 2 This bit controls the polarity of PWM compare output 2. Please see the output operations
in Figure 15-42 and Figure 15-43.
0 PWM output 2 is high when PMFCNTB (PMFCNTA if MTG=0) is less than PMFVAL2
1 PWM output 2 is high when PMFCNTB (PMFCNTA if MTG=0) is greater than PMFVAL2
1
CINV1
PWM Compare Invert 1 This bit controls the polarity of PWM compare output 1. Please see the output operations
in Figure 15-42 and Figure 15-43.
0 PWM output 1 is high when PMFCNTA is less than PMFVAL1
1 PWM output 1 is high when PMFCNTA is greater than PMFVAL1.
0
CINV0
PWM Compare Invert 0 This bit controls the polarity of PWM compare output 0. Please see the output operations
in Figure 15-42 and Figure 15-43.
0 PWM output 0 is high when PMFCNTA is less than PMFVAL0.
1 PWM output 0 is high when PMFCNTA is greater than PMFVAL0
Address: Module Base + 0x0020 Access: User read/write(1)
1. Read: Anytime
Write: Anytime except GLDOKA and RSTRTA which cannot be modified after the WP bit is set.
76543210
RPWMENA GLDOKA 000
RSTRTA LDOKA PWMRIEA
W
Reset00000000
Figure 15-24. PMF Enable Control A Register (PMFENCA)
Table 15-24. PMFENCA Field Descriptions
Field Description
7
PWMENA
PWM Generator A Enable — When MTG is clear, this bit when set enables the PWM generators A, B and C
and PWM0–5 outputs. When PWMENA is clear, PWM generators A, B and C are disabled, and the PWM0–5
outputs are in their inactive states unless the corresponding OUTCTL bits are set.
When MTG is set, this bit when set enables the PWM generator A and the PWM0 and PWM1 outputs.When
PWMENA is clear, the PWM generator A is disabled and PWM0 and PWM1 outputs are in their inactive states
unless the OUTCTL0 and OUTCTL1 bits are set.
After setting this bit a reload event is generated at the beginning of the PWM cycle.
0 PWM generator A and PWM0-1 (2–5 if MTG = 0) outputs disabled unless the respective OUTCTL bit is set
1 PWM generator A and PWM0-1 (2–5 if MTG = 0) outputs enabled
6
GLDOKA
Global Load Okay A — When this bit is set, a PMF external global load OK defined on device level replaces the
function of LDOKA. This bit cannot be modified after the WP bit is set.
0 LDOKA controls reload of double buffered registers
1 PMF external global load OK controls reload of double buffered registers
Figure 15-23. PMF Compare Invert Register (PMFCINV) Descriptions (continued)
Field Description
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 579
15.3.2.20 PMF Frequency Control A Register (PMFFQCA)
2
RSTRTA
Restart Generator A — When this bit is set, PWM generator A will be restarted at the next commutation event.
This bit cannot be modified after the WP bit is set.
0 No PWM generator A restart at the next commutation event.
1 PWM generator A restarts at the next commutation event
1
LDOKA
Load Okay A — When MTG is clear, this bit allows loads of the PRSCA bits, the PMFMODA register, and the
PMFVAL0-5 registers into a set of buffers. The buffered prescaler A divisor, PWM counter modulus A value, and
all PWM pulse widths take effect at the next PWM reload.
When MTG is set, this bit allows loads of the PRSCA bits, the PMFMODA register, and the PMFVAL0–1 registers
into a set of buffers. The buffered prescaler divisor A, PWM counter modulus A value, and PWM0–1 pulse widths
take effect at the next PWM reload.
Set LDOKA by reading it when it is logic zero and then writing a logic one to it. LDOKA is automatically cleared
after the new values are loaded, or can be manually cleared before a reload by writing a logic zero to it. Reset
clears LDOKA.
0 Do not load new modulus A, prescaler A, and PWM0–1 (2–5 if MTG = 0) values
1 Load prescaler A, modulus A, and PWM0–1 (2–5 if MTG = 0) values
Note: Do not set PWMENA bit before setting the LDOKA bit and do not clear the LDOKA bit at the same time as
setting the PWMENA bit.
0
PWMRIEA
PWM Reload Interrupt Enable A — This bit enables the PWMRFA flag to generate CPU interrupt requests.
0 PWMRFA CPU interrupt requests disabled
1 PWMRFA CPU interrupt requests enabled
Address: Module Base + 0x0021 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
RLDFQA HALFA PRSCA PWMRFA
W
Reset00000000
Figure 15-25. PMF Frequency Control A Register (PMFFQCA)
Table 15-25. PMFFQCA Field Descriptions
Field Description
7–4
LDFQA[3:0]
Load Frequency A — This field selects the PWM load frequency according to Table 15-26. See
Section 15.4.12.3, “Load Frequency” for more details.
Note: The LDFQA field takes effect when the current load cycle is complete, regardless of the state of the
LDOKA bit or global load OK. Reading the LDFQA field reads the buffered value and not necessarily the
value currently in effect.
3
HALFA
Half Cycle Reload A — This bit enables half-cycle reloads in center-aligned PWM mode. This bit has no effect
on edge-aligned PWMs. It takes effect immediately. When set, reload opportunities occur also when the counter
matches the modulus in addition to the start of the PWM period at count zero. See Section 15.4.12.3, “Load
Frequency” for more details.
0 Half-cycle reloads disabled
1 Half-cycle reloads enabled
Table 15-24. PMFENCA Field Descriptions (continued)
Field Description
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
580 Freescale Semiconductor
15.3.2.21 PMF Counter A Register (PMFCNTA)
This register displays the state of the 15-bit PWM A counter.
2–1
PRSCA[1:0]
Prescaler A — This buffered field selects the PWM clock frequency illustrated in Table 15-27.
Note: Reading the PRSCA field reads the buffered value and not necessarily the value currently in effect. The
PRSCA field takes effect at the beginning of the next PWM cycle and only when the LDOKA bit or global
load OK is set.
0
PWMRFA
PWM Reload Flag A — This flag is set at the beginning of every reload cycle regardless of the state of the
LDOKA bit or global load OK. Clear PWMRFA by reading PMFFQCA with PWMRFA set and then writing a logic
one to the PWMRFA bit. If another reload occurs before the clearing sequence is complete, writing logic one to
PWMRFA has no effect.
0 No new reload cycle since last PWMRFA clearing
1 New reload cycle since last PWMRFA clearing
Note: Clearing PWMRFA satisfies pending PWMRFA CPU interrupt requests.
Table 15-26. PWM Reload Frequency A
LDFQA[3:0] PWM Reload Frequency LDFQ[3:0] PWM Reload Frequency
0000 Every PWM opportunity 1000 Every 9 PWM opportunities
0001 Every 2 PWM opportunities 1001 Every 10 PWM opportunities
0010 Every 3 PWM opportunities 1010 Every 11 PWM opportunities
0011 Every 4 PWM opportunities 1011 Every 12 PWM opportunities
0100 Every 5 PWM opportunities 1100 Every 13 PWM opportunities
0101 Every 6 PWM opportunities 1101 Every 14 PWM opportunities
0110 Every 7 PWM opportunities 1110 Every 15 PWM opportunities
0111 Every 8 PWM opportunities 1111 Every 16 PWM opportunities
Table 15-27. PWM Prescaler A
PRSCA[1:0] Prescaler Value PAPWM Clock Frequency fPWM_A
00 1 fcore
01 2 fcore/2
10 4 fcore/4
11 8 fcore/8
Address: Module Base + 0x0022 Access: User read/write(1)
1. Read: Anytime
Write: Never
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0 PMFCNTA
W
Reset0000000000000000
Figure 15-26. PMF Counter A Register (PMFCNTA)
Table 15-25. PMFFQCA Field Descriptions (continued)
Field Description
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 581
15.3.2.22 PMF Counter Modulo A Register (PMFMODA)
The 15-bit unsigned value written to this register is the PWM period in PWM clock periods.
NOTE
The PWM counter modulo register is buffered. The value written does not
take effect until the LDOKA bit or global load OK is set and the next PWM
load cycle begins. Reading PMFMODA returns the value in the buf fer. It is
not necessarily the value the PWM generator A is currently using.
15.3.2.23 PMF Deadtime A Register (PMFDTMA)
The 12-bit value written to this register is the number of PWM clock cycles in complementary channel
operation. A reset sets the PWM deadtime register to the maximum value of 0x0FFF, selecting a deadtime
of 4095 PWM clock cycles. Deadtime is affected by changes to the prescaler value. The deadtime duration
is determined as follows:
TDEAD_A = PMFDTMA / fPWM_A = PMFDTMA PA Tcore Eqn. 15-1
15.3.2.24 PMF Enable Control B Register (PMFENCB)
Address: Module Base + 0x0024 Access: User read/write(1)
1. Read: Anytime
Write: Anytime. Do not write a modulus value of zero for center-aligned operation. Do not write a modulus of zero or one in
edge-aligned mode.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0 PMFMODA
W
Reset0000000000000000
Figure 15-27. PMF Counter Modulo A Register (PMFMODA)
Address: Module Base + 0x0026 Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0000 PMFDTMA
W
Reset0000111111111111
Figure 15-28. PMF Deadtime A Register (PMFDTMA)
Address: Module Base + 0x0028 Access: User read/write(1)
76543210
RPWMENB GLDOKB 000
RSTRTB LDOKB PWMRIEB
W
Reset00000000
Figure 15-29. PMF Enable Control B Register (PMFENCB)
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
582 Freescale Semiconductor
15.3.2.25 PMF Frequency Control B Register (PMFFQCB)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Anytime if MTG is set.GLDOKB and RSTRTB cannot be modified after the WP bit is set.
Table 15-28. PMFENCB Field Descriptions
Field Description
7
PWMENB
PWM Generator B Enable — If MTG is clear, this bit reads zero and cannot be written.
If MTG is set, this bit when set enables the PWM generator B and the PWM2 and PWM3 outputs. When
PWMENB is clear, PWM generator B is disabled, and the PWM2 and PWM3 outputs are in their inactive states
unless the corresponding OUTCTL bits are set.
After setting this bit a reload event is generated at the beginning of the PWM cycle.
0 PWM generator B and PWM2–3 outputs disabled unless the respective OUTCTL bit is set
1 PWM generator B and PWM2–3 outputs enabled
6
GLDOKB
Global Load Okay B — When this bit is set, a PMF external global load OK defined on device level replaces the
function of LDOKB. This bit cannot be modified after the WP bit is set.
0 LDOKB controls double reload of buffered registers
1 PMF external global load OK controls reload of double buffered registers
2
RSTRTB
Restart Generator B — When this bit is set, PWM generator B will be restarted at the next commutation event.
This bit cannot be modified after the WP bit is set.
0 No PWM generator B restart at the next commutation event
1 PWM generator B restart at the next commutation event
1
LDOKB
Load Okay B — If MTG is clear, this bit reads zero and cannot be written.
If MTG is set, this bit loads the PRSCB bits, the PMFMODB register and the PMFVAL2-3 registers into a set of
buffers. The buffered prescaler divisor B, PWM counter modulus B value, PWM2–3 pulse widths take effect at
the next PWM reload.
Set LDOKB by reading it when it is logic zero and then writing a logic one to it. LDOKB is automatically cleared
after the new values are loaded, or can be manually cleared before a reload by writing a logic zero to it. Reset
clears LDOKB.
0 Do not load new modulus B, prescaler B, and PWM2–3 values
1 Load prescaler B, modulus B, and PWM2–3 values
Note: Do not set PWMENB bit before setting the LDOKB bit and do not clear the LDOKB bit at the same time as
setting the PWMENB bit.
0
PWMRIEB
PWM Reload Interrupt Enable B — If MTG is clear, this bit reads zero and cannot be written.
If MTG is set, this bit enables the PWMRFB flag to generate CPU interrupt requests.
0 PWMRFB CPU interrupt requests disabled
1 PWMRFB CPU interrupt requests enabled
Address: Module Base + 0x0029 Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Anytime if MTG is set.
76543210
RLDFQB HALFB PRSCB PWMRFB
W
Reset00000000
Figure 15-30. PMF Frequency Control B Register (PMFFQCB)
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 583
Table 15-29. PMFFQCB Field Descriptions
Field Description
7–4
LDFQB[3:0]
Load Frequency B — This field selects the PWM load frequency according to Table 15-30. See
Section 15.4.12.3, “Load Frequency” for more details.
Note: The LDFQB field takes effect when the current load cycle is complete, regardless of the state of the
LDOKB bit or global load OK. Reading the LDFQB field reads the buffered value and not necessarily the
value currently in effect.
3
HALFB
Half Cycle Reload B — This bit enables half-cycle reloads in center-aligned PWM mode. This bit has no effect
on edge-aligned PWMs. It takes effect immediately. When set, reload opportunities occur also when the counter
matches the modulus in addition to the start of the PWM period at count zero. See Section 15.4.12.3, “Load
Frequency” for more details.
0 Half-cycle reloads disabled
1 Half-cycle reloads enabled
2–1
PRSCB[1:0]
Prescaler B — This buffered field selects the PWM clock frequency illustrated in Table 15-31.
Note: Reading the PRSCB field reads the buffered value and not necessarily the value currently in effect. The
PRSCB field takes effect at the beginning of the next PWM cycle and only when the LDOKB bit or global
load OK is set.
0
PWMRFB
PWM Reload Flag B — This flag is set at the beginning of every reload cycle regardless of the state of the
LDOKB bit. Clear PWMRFB by reading PMFFQCB with PWMRFB set and then writing a logic one to the
PWMRFB bit. If another reload occurs before the clearing sequence is complete, writing logic one to PWMRFB
has no effect.
0 No new reload cycle since last PWMRFB clearing
1 New reload cycle since last PWMRFB clearing
Note: Clearing PWMRFB satisfies pending PWMRFB CPU interrupt requests.
Table 15-30. PWM Reload Frequency B
LDFQB[3:0] PWM Reload Frequency LDFQ[3:0] PWM Reload Frequency
0000 Every PWM opportunity 1000 Every 9 PWM opportunities
0001 Every 2 PWM opportunities 1001 Every 10 PWM opportunities
0010 Every 3 PWM opportunities 1010 Every 11 PWM opportunities
0011 Every 4 PWM opportunities 1011 Every 12 PWM opportunities
0100 Every 5 PWM opportunities 1100 Every 13 PWM opportunities
0101 Every 6 PWM opportunities 1101 Every 14 PWM opportunities
0110 Every 7 PWM opportunities 1110 Every 15 PWM opportunities
0111 Every 8 PWM opportunities 1111 Every 16 PWM opportunities
Table 15-31. PWM Prescaler B
PRSCB[1:0] Prescaler Value PBPWM Clock Frequency fPWM_B
00 1 fcore
01 2 fcore/2
10 4 fcore/4
11 8 fcore/8
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
584 Freescale Semiconductor
15.3.2.26 PMF Counter B Register (PMFCNTB)
This register displays the state of the 15-bit PWM B counter.
15.3.2.27 PMF Counter Modulo B Register (PMFMODB)
The 15-bit unsigned value written to this register is the PWM period in PWM clock periods.
NOTE
The PWM counter modulo register is buffered. The value written does not
take effect until the LDOKB bit or global load OK is set and the next PWM
load cycle begins. Reading PMFMODB returns the value in the buf fer. It is
not necessarily the value the PWM generator B is currently using.
15.3.2.28 PMF Deadtime B Register (PMFDTMB)
The 12-bit value written to this register is the number of PWM clock cycles in complementary channel
operation. A reset sets the PWM deadtime register to the maximum value of 0x0FFF, selecting a deadtime
Address: Module Base + 0x002A Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Never
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R 0 PMFCNTB
W
Reset0000000000000000
Figure 15-31. PMF Counter B Register (PMFCNTB)
Address: Module Base + 0x002C Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Anytime if MTG is set.Do not write a modulus value of zero for center-aligned operation. Do not write a modulus of zero
or one in edge-aligned mode.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0 PMFMODB
W
Reset0000000000000000
Figure 15-32. PMF Counter Modulo B Register (PMFMODB)
Address: Module Base + 0x002E Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Anytime if MTG is set. This register cannot be modified after the WP bit is set.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0000 PMFDTMB
W
Reset0000111111111111
Figure 15-33. PMF Deadtime B Register (PMFDTMB)
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 585
of 4095 PWM clock cycles. Deadtime is affected by changes to the prescaler value. The deadtime duration
is determined as follows:
TDEAD_B = PMFDTMB / fPWM_B = PMFDTMB PB Tcore Eqn. 15-2
15.3.2.29 PMF Enable Control C Register (PMFENCC)
Address: Module Base + 0x0030 Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Anytime if MTG is set. GLDOKC and RSTRTC cannot be modified after the WP bit is set.
76543210
RPWMENC GLDOKC 000
RSTRTC LDOKC PWMRIEC
W
Reset00000000
Figure 15-34. PMF Enable Control C Register (PMFENCC)
Table 15-32. PMFENCC Field Descriptions
Field Description
7
PWMENC
PWM Generator C Enable — If MTG is clear, this bit reads zero and cannot be written.
If MTG is set, this bit when set enables the PWM generator C and the PWM4 and PWM5 outputs. When
PWMENC is clear, PWM generator C is disabled, and the PWM4 and PWM5 outputs are in their inactive states
unless the corresponding OUTCTL bits are set.
After setting this bit a reload event is generated at the beginning of the PWM cycle.
0 PWM generator C and PWM4–5 outputs disabled unless the respective OUTCTL bit is set
1 PWM generator C and PWM4–5 outputs enabled
6
GLDOKC
Global Load Okay C — When this bit is set, a PMF external global load OK defined on device level replaces the
function of LDOKC. This bit cannot be modified after the WP bit is set.
0 LDOKC controls reload of double buffered registers
1 PMF external global load OK controls reload of double buffered registers
2
RSTRTC
Restart Generator C — When this bit is set, PWM generator C will be restarted at the next commutation event.
This bit cannot be modified after the WP bit is set.
0 No PWM generator C restart at the next commutation event
1 PWM generator C restart at the next commutation event
1
LDOKC
Load Okay C — If MTG is clear, this bit reads zero and can not be written.
If MTG is set, this bit loads the PRSCC bits, the PMFMODC register and the PMFVAL4–5 registers into a set of
buffers. The buffered prescaler divisor C, PWM counter modulus C value, PWM4–5 pulse widths take effect at
the next PWM reload.
Set LDOKC by reading it when it is logic zero and then writing a logic one to it. LDOKC is automatically cleared
after the new values are loaded, or can be manually cleared before a reload by writing a logic zero to it. Reset
clears LDOKC.
0 Do not load new modulus C, prescaler C, and PWM4–5 values
1 Load prescaler C, modulus C, and PWM4–5 values
Note: Do not set PWMENC bit before setting the LDOKC bit and do not clear the LDOKC bit at the same time
as setting the PWMENC bit.
0
PWMRIEC
PWM Reload Interrupt Enable C — If MTG is clear, this bit reads zero and cannot be written.
If MTG is set, this bit enables the PWMRFC flag to generate CPU interrupt requests.
0 PWMRFC CPU interrupt requests disabled
1 PWMRFC CPU interrupt requests enabled
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
586 Freescale Semiconductor
15.3.2.30 PMF Frequency Control C Register (PMFFQCC)
Address: Module Base + 0x0031 Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Anytime if MTG is set.
76543210
RLDFQC HALFC PRSCC PWMRFC
W
Reset00000000
Figure 15-35. PMF Frequency Control C Register (PMFFQCC)
Table 15-33. PMFFQCC Field Descriptions
Field Description
7–4
LDFQC[3:0]
Load Frequency C — This field selects the PWM load frequency according to Table 15-34. See
Section 15.4.12.3, “Load Frequency” for more details.
Note: The LDFQC field takes effect when the current load cycle is complete, regardless of the state of the
LDOKC bit or global load OK. Reading the LDFQC field reads the buffered value and not necessarily the
value currently in effect.
3
HALFC
Half Cycle Reload C — This bit enables half-cycle reloads in center-aligned PWM mode. This bit has no effect
on edge-aligned PWMs. It takes effect immediately. When set, reload opportunities occur also when the counter
matches the modulus in addition to the start of the PWM period at count zero. See Section 15.4.12.3, “Load
Frequency” for more details.
0 Half-cycle reloads disabled
1 Half-cycle reloads enabled
2–1
PRSCC[1:0]
Prescaler C — This buffered field selects the PWM clock frequency illustrated in Table 15-35.
Note: Reading the PRSCC field reads the buffered value and not necessarily the value currently in effect. The
PRSCC field takes effect at the beginning of the next PWM cycle and only when the LDOKC bit or global
load OK is set.
0
PWMRFC
PWM Reload Flag C — This flag is set at the beginning of every reload cycle regardless of the state of the
LDOKC bit or global load OK. Clear PWMRFC by reading PMFFQCC with PWMRFC set and then writing a logic
one to the PWMRFC bit. If another reload occurs before the clearing sequence is complete, writing logic one to
PWMRFC has no effect.
0 No new reload cycle since last PWMRFC clearing
1 New reload cycle since last PWMRFC clearing
Note: Clearing PWMRFC satisfies pending PWMRFC CPU interrupt requests.
Table 15-34. PWM Reload Frequency C
LDFQC[3:0] PWM Reload Frequency LDFQ[3:0] PWM Reload Frequency
0000 Every PWM opportunity 1000 Every 9 PWM opportunities
0001 Every 2 PWM opportunities 1001 Every 10 PWM opportunities
0010 Every 3 PWM opportunities 1010 Every 11 PWM opportunities
0011 Every 4 PWM opportunities 1011 Every 12 PWM opportunities
0100 Every 5 PWM opportunities 1100 Every 13 PWM opportunities
0101 Every 6 PWM opportunities 1101 Every 14 PWM opportunities
0110 Every 7 PWM opportunities 1110 Every 15 PWM opportunities
0111 Every 8 PWM opportunities 1111 Every 16 PWM opportunities
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 587
15.3.2.31 PMF Counter C Register (PMFCNTC)
This register displays the state of the 15-bit PWM C counter.
15.3.2.32 PMF Counter Modulo C Register (PMFMODC)
The 15-bit unsigned value written to this register is the PWM period in PWM clock periods.
NOTE
The PWM counter modulo register is buffered. The value written does not
take effect until the LDOKC bit or global load OK is set and the next PWM
load cycle begins. Reading PMFMODC returns the value in the buf fer. It is
not necessarily the value the PWM generator A is currently using.
Table 15-35. PWM Prescaler C
PRSCC[1:0] Prescaler Value PCPWM Clock Frequency fPWM_C
00 1 fcore
01 2 fcore/2
10 4 fcore/4
11 8 fcore/8
Address: Module Base + 0x0032 Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Never
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R 0 PMFCNTC
W
Reset0000000000000000
Figure 15-36. PMF Counter C Register (PMFCNTC)
Address: Module Base + 0x0034 Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Anytime if MTG is set. Do not write a modulus value of zero for center-aligned operation. Do not write a modulus of zero
or one in edge-aligned mode.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0 PMFMODC
W
Reset0000000000000000
Figure 15-37. PMF Counter Modulo C Register (PMFMODC)
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
588 Freescale Semiconductor
15.3.2.33 PMF Deadtime C Register (PMFDTMC)
The 12-bit value written to this register is the number of PWM clock cycles in complementary channel
operation. A reset sets the PWM deadtime register to the maximum value of 0x0FFF, selecting a deadtime
of 4095 PWM clock cycles. Deadtime is affected by changes to the prescaler value. The deadtime duration
is determined as follows:
TDEAD_C = PMFDTMC / fPWM_C = PMFDTMC PC Tcore Eqn. 15-3
15.3.2.34 PMF Disable Mapping Registers (PMFDMP0-5)
Address: Module Base + 0x0036 Access: User read/write(1)
1. Read: Anytime. Returns zero if MTG is clear.
Write: Anytime if MTG is set.This register cannot be modified after the WP bit is set.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0000 PMFDTMC
W
Reset0000111111111111
Figure 15-38. PMF Deadtime C Register (PMFDTMC)
Address: Module Base + 0x0038 PMFDMP0
Module Base + 0x0039 PMFDMP1
Module Base + 0x003A PMFDMP2
Module Base + 0x003B PMFDMP3
Module Base + 0x003C PMFDMP4
Module Base + 0x003D PMFDMP5
Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set.
76543210
RDMPn5DMPn4DMPn3DMPn2DMPn1DMPn0
W
Reset00000000
Figure 15-39. PMF Disable Mapping Register (PMFDMP0-5)
Table 15-36. PMFDMP0-5 Field Descriptions
Field Description
7-6
DMPn5
PWM Disable Mapping Channel n FAULT5 — This bit selects for PWMn whether the output is disabled or
forced to OUTFn at a FAULT5 event. Disabling PWMn has priority over forcing PWMn to OUTFn. This register
cannot be modified after the WP bit is set.
00 PWMn unaffected by FAULT5 event (interrupt flag setting only)
01 PWMn unaffected by FAULT5 event (interrupt flag setting only)
10 PWMn disabled on FAULT5 event
11 P WMn forced to OUTFn on FAULT5 event
n is 0, 1, 2, 3, 4 and 5.
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 589
15.3.2.35 PMF Output Control on Fault Register (PMFOUTF)
Table 15-38. Software Output Control on FAULT4 or FAULT5 Event
5-4
DMPn4
PWM Disable Mapping Channel n FAULT4 — This bit selects for PWMn whether the output is disabled or
forced to OUTFn at a FAULT4 event. Disabling PWMn has priority over forcing PWMn to OUTFn. This register
cannot be modified after the WP bit is set.
00 PWMn unaffected by FAULT4 event (interrupt flag setting only)
01 PWMn unaffected by FAULT4 event (interrupt flag setting only)
10 PWMn disabled on FAULT4 event
11 P WMn forced to OUTFn on FAULT4 event
n is 0, 1, 2, 3, 4 and 5.
3-0
DMPnPWM Disable Mapping Channel n FAULT3-0 This bit selects for PWMn if the output is disabled at a FAULT3-
0 event. Disabling PWMn has priority over forcing PWMn to OUTFn. This bit cannot be modified after the WP bit
is set.
FAULT3-0 have priority over FAULT5-4.
0PWMn unaffected by FAULT3-0 event
1PWMn disabled on FAULT3-0 event
n is 0, 1, 2, 3, 4 and 5.
Address: Module Base + 0x003E Access: User read/write(1)
1. Read: Anytime
Write: This register cannot be modified after the WP bit is set.
76543210
R0 0 OUTF5 OUTF4 OUTF3 OUTF2 OUTF1 OUTF0
W
Reset00000000
Figure 15-40. PMF Output Control on Fault Register (PMFOUTF)
Table 15-37. PMFOUTF Field Descriptions
Field Description
5–0
OUTF[5:0]
OUTF Bits — When the corresponding DMPn4 or DMPn5 bits are set to switch to output control on a related
FAULT4 or FAULT5 event, these bits control the PWM outputs, illustrated in Table 15-38.This register cannot be
modified after the WP bit is set.
OUTFn Bit Complementary
Channel Operation
Independent
Channel Operation
OUTF0 1 — PWM0 is active
0 — PWM0 is inactive
1 — PWM0 is active
0 — PWM0 is inactive
OUTF1 1 — PWM1 is complement of PWM0
0 — PWM1 is inactive
1 — PWM1 is active
0 — PWM1 is inactive
OUTF2 1 — PWM2 is active
0 — PWM2 is inactive
1 — PWM2 is active
0 — PWM2 is inactive
OUTF3 1 — PWM3 is complement of PWM2
0 — PWM3 is inactive
1 — PWM3 is active
0 — PWM3 is inactive
Table 15-36. PMFDMP0-5 Field Descriptions (continued)
Field Description
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OUTF4 1 — PWM4 is active
0 — PWM4 is inactive
1 — PWM4 is active
0 — PWM4 is inactive
OUTF5 1 — PWM5 is complement of PWM4
0 — PWM5 is inactive
1 — PWM5 is active
0 — PWM5 is inactive
OUTFn Bit Complementary
Channel Operation
Independent
Channel Operation
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15.4 Functional Description
15.4.1 Block Diagram
A block diagram of the PMF is shown in Figure 15-1. The MTG bit allows the use of multiple PWM
generators (A, B, and C) or just a single generator (A). PWM0 and PWM1 constitute Pair A, PWM2 and
PWM3 constitute Pair B, and PWM4 and PWM5 constitute Pair C.
Figure 15-41 depicts Pair A signal paths of PWM0 and PWM1. Pairs B and C have the same structure.
Figure 15-41. Detail of PWM0 and PWM1 Signal Paths
NOTE
It is possible to have both channels of a complementary pair to be high. For
example, if the TOPNEGA (negative polarity for PWM0), BOTNEGA
(negative polarity for PWM1), MSK0 and MSK1 bits are set, both the PWM
complementary outputs of generator A will be high. See Section 15.3.2.2,
“PMF Configure 1 Register (PMFCFG1)” for the description of TOPNEG
and BOTNEG bits, and Section 15.3.2.3, “PMF Configure 2 Register
(PMFCFG2)” for the description of the MSK0 and MSK1 bits.
INDEPA
1
OUTF0
OUT0
Fault4-5
Detect
OUTCTL0
1
1
CINV0
Gen. 0
0 0 0
0 0 1
1 0 x
x 1 x
PECA
in
deadtime
Fault0-3
Detect
MSK0 TOPNEGA
PWM0
1
OUTF1
OUT1 OUTCTL1
1
1
CINV1
Gen. 1
MSK1
PWM1
(OUTCTL1 & PWMENA)
| (~OUTCTL1 & OUT1)
COMP
SRCA
BOTNEGA
Fault4-5
Detect
PINVA
Complementary Mode
Independent Mode
Softw. Output Control
Generated PWM
Softw. Output Control
Generated PWM
= Functional Block
= Configuration Register Bit
ICCA
1
IPOLA
Count
direction
1X
ISENS
00
01
IS0
0
(A)
(A)
Correction
MODA
VAL1
VAL0
DTMA
Deadtime Dist. Correction
and Asymmetric PWM
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15.4.2 Prescaler
To permit lower PWM frequencies, the prescaler produces the PWM clock frequency by dividing the core
clock frequency by one, two, four, and eight. Each PWM generator has its own prescaler divisor. Each
prescaler is buffered and will not be used by its PWM generator until the corresponding Load OK bit is set
and a new PWM reload cycle begins.
15.4.3 PWM Generator
Each PWM generator contains a 15-bit up/down PWM counter producing output signals with software-
selectable
Alignment — The logic state of each pair EDGE bit determines whether the PWM pair outputs are
edge-aligned or center-aligned
Period — The value written to each pair PWM counter modulo register is used to determine the
PWM pair period. The period can also be varied by using the prescaler
With edge-aligned output, the modulus is the period of the PWM output in clock cycles
With center-aligned output, the modulus is one-half of the PWM output period in clock cycles
Pulse width — The number written to the PWM value register determines the pulse width duty
cycle of the PWM output in clock cycles
With center-aligned output, the pulse width is twice the value written to the PWM value register
With edge-aligned output, the pulse width is the value written to the PWM value register
15.4.3.1 Alignment and Compare Output Polarity
Each edge-align bit, EDGEx, selects either center-aligned or edge-aligned PWM generator outputs.
PWM compare output polarity is selected by the CINVn bit field in the source control (PMFCINV)
register. Please see the output operations in Figure 15-42 and Figure 15-43.
The PWM compare output is driven to a high state when the value of PWM value (PMFVALn) register is
greater than the value of PWM counter, and PWM compare is counting downwards if the corresponding
channel CINVn=0. Or, the PWM compare output is driven to low state if the corresponding channel
CINVn=1.
The PWM compare output is driven to low state when the value of PWM value (PMFVALn) register
matches the value of PWM counter, and PWM counter is counting upwards if the corresponding channel
CINVn=0. Or, the PWM compare output is driven to high state if the corresponding channel CINVn=1.
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Figure 15-42. Center-Aligned PWM Output
Figure 15-43. Edge-Aligned PWM Output
15.4.3.2 Period
A PWM period is determined by the value written to the PWM counter modulo registers PMFMODx.
The PWM counter is an up/down counter in center-aligned mode. In this mode the PWM highest output
resolution is two core clock cycles.
PWM period = (PWM modulus) (PWM clock period) 2 Eqn. 15-4
Figure 15-44. Center-Aligned PWM Period
Up/Down Counter
Modulus = 4
Alignment Reference
PWM Compare Output
Duty Cycle = 50%
CINVn= 0
CINVn = 1
Up Counter
Modulus = 4
Alignment Reference
PWM Compare Output
Duty Cycle = 50% CINVn = 0
CINVn = 1
UP/DOWN COUNTERER
PWM CLOCK PERIOD
PWM PERIOD = 8 x PWM CLOCK PERIOD
MODULUS = 4
COUNTER 12343210
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NOTE
Because of the equals-comparator architecture of this PMF, the modulus
equals zero case is considered illegal in center-aligned mode. Therefore, the
modulus register does not return to zero, and a modulus value of zero will
result in waveforms inconsistent with the other modulus waveforms. If a
modulus of zero is loaded, the counter will continually count down from
0x7FFF. This operation will not be tested or guaranteed. Consider it illegal.
However, the deadtime constraints and fault conditions will still be
guaranteed.
In edge-aligned mode, the PWM counter is an up counter. The PWM output resolution is one core clock
cycle.
PWM period = PWM modulus PWM clock period Eqn. 15-5
Figure 15-45. Edge-Aligned PWM Period
NOTE
In edge-aligned mode the modulus equals zero and one cases are considered
illegal.
15.4.3.3 Duty Cycle
The signed 16-bit number written to the PMF value registers (PMFVALn) is the pulse width in PWM clock
periods of the PWM generator output (or period minus the pulse width if CINVn=1).
NOTE
A PWM value less than or equal to zero deactivates the PWM output for the
entire PWM period. A PWM value greater than or equal to the modulus
activates the PWM output for the entire PWM period when CINVn=0, and
vice versa if CINVn=1.
UP COUNTERER
PWM CLOCK PERIOD
PWM PERIOD = 4 x PWM CLOCK PERIOD
MODULUS = 4
COUNTER 1234 1
Duty cycle PMFVAL
PMFMOD
--------------------------- 100=
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Center-aligned operation is illustrated in Figure 15-46.
PWM pulse width = (PWM value) (PWM clock period) 2 Eqn. 15-6
Figure 15-46. Center-Aligned PWM Pulse Width
Edge-aligned operation is illustrated in Figure 15-47.
PWM pulse width = (PWM value) (PWM clock period) Eqn. 15-7
Table 15-39. PWM Value and Underflow Conditions
PMFVALn Condition PWM Value Used
0x0000–0x7FFF Normal Value in registers
0x8000–0xFFFF Underflow 0x0000
P/DOWN COUNTERER
MODULUS = 4
PWM VALUE = 0
0/4 = 0%
PWM VALUE = 1
1/4 = 25%
PWM VALUE = 2
2/4 = 50%
PWM VALUE = 3
3/4 = 75%
PWM VALUE = 4
4/4 = 100%
COUNTER 1234321012343210
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Figure 15-47. Edge-Aligned PWM Pulse Width
15.4.4 Independent or Complementary Channel Operation
Writing a logic one to an INDEPx bit configures a pair of the PWM outputs as two independent PWM
channels. Each PWM output has its own PWM value register operating independently of the other
channels in independent channel operation.
Writing a logic zero to a INDEPx bit configures the PWM output as a pair of complementary channels.
The PWM outputs are paired as shown in Figure 15-48 in complementary channel operation.
Figure 15-48. Complementary Channel Pairs
UP COUNTERER
PWM VALUE = 0
MODULUS = 4
PWM VALUE = 1
PWM VALUE = 2
PWM VALUE = 3
PWM VALUE = 4
0/4 = 0%
1/4 = 25%
2/4 = 50%
3/4 = 75%
4/4 = 100%
COUNTER 123 1
4
PWM CHANNELS 0 AND 1
PMFVAL1
PWM CHANNELS 2 AND 3
PWM CHANNELS 4 AND 5
REGISTER
TOP
BOTTOM
TOP
BOTTOM
TOP
BOTTOM
PMFVAL0
REGISTER
PMFVAL3
REGISTER
PMFVAL2
REGISTER
PMFVAL5
REGISTER
PMFVAL4
REGISTER
PAIR A
PAIR B
PAIR C
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The complementary channel operation is for driving top and bottom transistors in a motor drive circuit,
such as the one in Figure 15-49.
Figure 15-49. Typical 3-Phase AC Motor Drive
In complementary channel operation following additional features exist:
Deadtime insertion
Separate top and bottom pulse width correction via current status inputs or software
Three variants of PWM output:
Asymmetric in center-aligned mode
Variable edge placement in edge-aligned mode
Double switching in center-aligned mode
15.4.5 Deadtime Generators
While in complementary operation, each PWM pair can be used to drive top/bottom transistors, as shown
in Figure 15-50. Ideally, the PWM pairs are an inversion of each other. When the top PWM channel is
active, the bottom PWM channel is inactive, and vice versa.
NOTE
To avoid a short-circuit on the DC bus and endangering the transistor , there
must be no overlap of conducting intervals between the top and bottom
transistor. But the transistors characteristics make its switching-off time
longer than switching-on time. To avoid the conducting overlap of the top
and bottom transistors, de adtime needs to be inserted in the switching
period.
Deadtime generators automatically insert software-selectable activation delays into each pair of PWM
outputs. The deadtime register (PMFDTMx) specifies the number of PWM clock cycles to use for
deadtime delay. Every time the deadtime generator inputs changes state, deadtime is inserted. Deadtime
forces both PWM outputs in the pair to the inactive state.
A method of correcting this, adding to or subtracting from the PWM value used, is discussed next.
PWM
0
PWM
2
AC
INPUTS
TO
MOTOR
PWM
4
PWM
3
PWM
5
PWM
1
A
B
C
PHASE
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Figure 15-50. Deadtime Generators
Figure 15-51. Deadtime Insertion, Center Alignment
MUX
OUT0
OUTCTL0
MUX
OUT2
OUTCTL2
MUX
OUT4
OUTCTL4
PWM
GENERATOR
CURRENT
STATUS
DEADTIME
GENERATOR
OUT1
DEADTIME
GENERATOR
DEADTIME
GENERATOR
PWM0 &
PWM2 &
PWM4 &
OUT3
OUT5
TOP/BOTTOM
GENERATOR
TOP/BOTTOM
GENERATOR
TOP/BOTTOM
GENERATOR
TOP (PWM0) TO FAULT
PROTECTION
TO FAULT
PROTECTION
TO FAULT
PROTECTION
BOTTOM (PWM1)
TOP (PWM2)
BOTTOM (PWM3)
TOP (PWM4)
BOTTOM (PWM5)
PWM1
PWM3
PWM5
PWM0, NO DEADTIME
PWM1, NO DEADTIME
PWM0, DEADTIME = 1
PWM1, DEADTIME = 1
MODULUS = 4
PWM VALUE = 3,1
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Figure 15-52. Deadtime at Duty Cycle Boundaries
Figure 15-53. Deadtime and Small Pulse Widths
NOTE
The waveform at the output is delayed by two core clock cycles for
deadtime insertion.
15.4.6 Top/Bottom Correction
In complementary mode, either the top or the bottom transistor controls the output voltage. However,
deadtime has to be inserted to avoid overlap of conducting interval between the top and bottom transistor.
Both transistors in complementary mode are off during deadtime, allowing the output voltage to be
determined by the current status of the load and introduce distortion in the output voltage. See Figure 15-
54. On AC induction motors running open-loop, the distortion typically manifests itself as poor low-speed
performance, such as torque ripple and rough operation.
PWM0, NO DEADTIME
PWM1, NO DEADTIME
PWM0, DEADTIME = 2
PWM1, DEADTIME = 2
MODULUS = 3
PWM VALUE = 1 PWM VALUE = 1 PWM VALUE = 1
PWM VALUE = 1
MODULUS = 3
PWM0, NO DEADTIME
PWM0, DEADTIME = 3
PWM1, NO DEADTIME
PWM1, DEADTIME = 3
2PWM VALUE PWM
Value = 1PWM Value = 2PWM Value = 3
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Figure 15-54. Deadtime Distortion
During deadtime, load inductance distorts output voltage by keeping current flowing through the diodes.
This deadtime current flow creates a load voltage that varies with current direction. W ith a positive current
flow, the load voltage during deadtime is equal to the bottom supply, putting the top transistor in control.
W ith a negative current flow , the load voltage during deadtime is equal to the top supply putting the bottom
transistor in control.
Remembering that the original PWM pulse widths were shortened by deadtime insertion, the averaged
sinusoidal output will be less than the desired value. However, when deadtime is inserted, it creates a
distortion in motor current waveform. This distortion is aggravated by dissimilar turn-on and turn-off
delays of each of the transistors. By giving the PWM module information on which transistor is controlling
at a given time, this distortion can be corrected.
For a typical circuit in complementary channel operation, only one of the transistors will be effective in
controlling the output voltage at any given time. This depends on the direction of the motor current for that
pair . See Figure 15-54. T o correct distortion one of two different factors must be added to the desired PWM
value, depending on whether the top or bottom transistor is controlling the output voltage. Therefore, the
software is responsible for calculating both compensated PWM values prior to placing them in an odd-
numbered/even numbered PWM register pair. Either the odd or the even PMFVAL register controls the
pulse width at any given time. For a given PWM pair , whether the odd or even PMFVAL register is active
depends on either:
The state of the current status input, IS, for that driver
The state of the odd/even correction bit, IPOLx, for that driver if ICC bits in the PMFICCTL
register are set to zeros
The direction of PWM counter if ICC bits in the PMFICCTL register are set to ones
To correct deadtime distortion, software can decrease or increase the value in the appropriate PMFVAL
register.
DESIRED
DEADTIME
PWM TO TOP
POSITIVE
NEGATIVE
PWM TO BOTTOM
POSITIVE CURRENT
NEGATIVE CURRENT
LOAD VOLTAGE
TRANSISTOR
TRANSISTOR
LOAD VOLTAGE
LOAD VOLTAGE
CURRENT
CURRENT
V+
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In edge-aligned operation, decreasing or increasing the PWM value by a correction value equal to
the deadtime typically compensates for deadtime distortion.
In center-aligned operation, decreasing or increasing the PWM value by a correction value equal
to one-half the deadtime typically compensates for deadtime distortion.
In the complementary channel operation, ISENS selects one of three correction methods:
Manual correction
Automatic current status correction during deadtime
Automatic current status correction when the PWM counter value equals the value in the PWM
counter modulus registers
NOTE
External current status sensing circuitry is required at the corresponding
inputs which produces a logic zero level for positive current and logic one
for negative current. PWM 0, 2, and 4 are considered the top PWMs while
the bottom PWMs are PWM 1, 3, and 5.
15.4.6.1 Manual Correction
The IPOLx bits select either the odd or the even PWM value registers to use in the next PWM cycle.
Table 15-40. Correction Method Selection
ISENS Correction Method
00 No correction(1)
1. The current status inputs can be used as general purpose input/output ports.
01 Manual correction
10 Current status sample correction on inputs IS0, IS1, and IS2 during deadtime(2)
2. The polarity of the IS input is latched when both the top and bottom PWMs are off. At the 0%
and 100% duty cycle boundaries, there is no deadtime, so no new current value is sensed.
11 Current status sample on inputs IS0, IS1, and IS2(3)
At the half cycle in center-aligned operation
At the end of the cycle in edge-aligned operation
3. Current is sensed even with 0% or 100% duty cycle.
Table 15-41. Top/Bottom Manual Correction
Bit Logic state Output Control
IPOLA 0 PMFVAL0 controls PWM0/PWM1 pair
1 PMFVAL1 controls PWM0/PWM1 pair
IPOLB 0 PMFVAL2 controls PWM2/PWM3 pair
1 PMFVAL3 controls PWM2/PWM3 pair
IPOLC 0 PMFVAL4 controls PWM4/PWM5 pair
1 PMFVAL5 controls PWM4/PWM5 pair
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NOTE
IPOLx bits are buf fered so only one PWM register is used per PWM cycle.
If an IPOLx bit changes during a PWM period, the new value does not take
effect until the next PWM period.
IPOLx bits take ef fect at the end of e ach PWM cycle regardless of the state
of the related LDOK bit or global load OK.
Figure 15-55. Internal Correction Logic when ISENS = 01
To detect the current status, the voltage on each IS input is sampled twice in a PWM period, at the end of
each deadtime. The value is stored in the DTn bits in the PMF Deadtime Sample register (PMFDTMS).
The DTn bits are a timing marker especially indicating when to toggle between PWM value registers.
Software can then set the IPOLx bit to toggle PMFVAL registers according to DTn values.
Figure 15-56. Current Status Sense Scheme for Deadtime Correction
Both D flip-flops latch low, DT0 = 0, DT1 = 0, during deadtime periods if current is large and flowing out
of the complementary circuit. See Figure 15-56. Both D flip-flops latch the high, DT0 = 1, DT1 = 1, during
deadtime periods if current is also large and flowing into the complementary circuit.
However, under low-current, the output voltage of the complementary circuit during deadtime is
somewhere between the high and low levels. The current cannot free-wheel through the opposition anti-
body diode, regardless of polarity, giving additional distortion when the current crosses zero.
DEADTIME
GENERATOR
DQ
CLK
IPOLx BIT
A/B
A
B
TOP PWM
BOTTOM PWM
PWM CYCLE START
PWM CONTROLLED
BY ODD PMFVAL REGISTER
PWM CONTROLLED
BY EVEN PMFVAL REGISTER
PWM0
PWM1 DQ
CLK
DQ
CLK
VOLTAGE
SENSOR
IS0 PIN
PWM0
PWM1
DT0
DT1
POSITIVE
CURRENT
NEGATIVE
CURRENT
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Sampled results will be DT0 = 0 and DT1 = 1. Thus, the best time to change one PWM value register to
another is just before the current zero crossing.
Figure 15-57. Output Voltage Waveforms
15.4.6.2 Current-Sensing Correction
A current sense input, IS, for a PWM pair selects either the odd or the even PWM value registers to use in
the next PWM cycle. The selection is based on user -provided current sense circuitry driving the related IS
input high for negative current and low for positive current.
Previously shown, the current direction can be determined by the output voltage during deadtime. Thus, a
simple external voltage sensor can be used when current status is completed during deadtime, ISENS = 10.
Deadtime does not exist at the 100 percent and zero percent duty cycle boundaries. Therefore, the second
automatic mode must be used for correction, ISENS = 1 1, where current status is sampled at the half cycle
Table 15-42. Top/Bottom Current Sense Correction
Pin Logic State Output Control
IS0 0 PMFVAL0 controls PWM0/PWM1 pair
1 PMFVAL1 controls PWM0/PWM1 pair
IS1 0 PMFVAL2 controls PWM2/PWM3 pair
1 PMFVAL3 controls PWM2/PWM3 pair
IS2 0 PMFVAL4 controls PWM4/PWM5 pair
1 PMFVAL5 controls PWM4/PWM5 pair
DEADTIME
PWM TO TOP
POSITIVE
NEGATIVE
PWM TO BOTTOM
LOAD VOLTAGE WITH
LOAD VOLTAGE WITH
TRANSISTOR
TRANSISTOR
HIGH POSITIVE CURRENT
LOW POSITIVE CURRENT
CURRENT
CURRENT
LOAD VOLTAGE WITH
HIGH NEGATIVE CURRENT
LOAD VOLTAGE WITH
NEGATIVE CURRENT
TBTB
T = DEADTIME INTERVAL BEFORE ASSERTION OF TOP PWM
B = DEADTIME INTERVAL BEFORE ASSERTION OF BOTTOM PWM
V+
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in center-aligned operation and at the end of cycle in edge-aligned operation. Using this mode requires
external circuitry to sense current direction.
Figure 15-58. Internal Correction Logic when ISENS = 10
Figure 15-59. Internal Correction Logic when ISENS = 11
NOTE
Values latched on the ISx inputs are buffered so only one PWM register is
used per PWM cycle. If a current status changes during a PWM period, the
new value does not take effect until the next PWM period.
When initially enabled by setting the PWMEN bit, no curre nt status has previously been sampled. PWM
value registers one, three, and five initially control the three PWM pairs when configured for current status
correction.
Figure 15-60. Correction with Positive Current
DQ
CLK
PWM CONTROLLED BY
PWM CONTROLLED BY
DEADTIME
GENERATOR
DQ
CLK
ISx PIN
A/B
A
B
PWM CYCLE START
TOP PWM
BOTTOM PWM
INITIAL VALUE = 0
ODD PMFVAL REGISTER
EVEN PMFVAL REGISTER
IN DEADTIME
DQ
CLK
PWM CONTROLLED BY
PWM CONTROLLED BY
DEADTIME
GENERATOR
DQ
CLK
ISx PIN
A/B
A
B
PWM CYCLE START
TOP PWM
BOTTOM PWM
INITIAL VALUE = 0
ODD PMFVAL REGISTER
EVEN PMFVAL REGISTER
PMFCNT = PMFMOD
DESIRED LOAD VOLTAGE
BOTTOM PWM
LOAD VOLTAGE
TOP PWM
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Figure 15-61. Correction with Negative Current
15.4.7 Asymmetric PWM Output
In complementary center- aligned mode, the PWM duty cycle is a ble to ch ange alternatively at every half
cycle. The count direction of the PWM counter selects either the odd or the even PWM value registers to
use in the PWM cycle. For counting up, select even PWM value registers to use in the PWM cycle. For
counting down, select odd PWM value registers to use in the PWM cycle. The related CINVn bits of the
PWM pair must select the same polarity for both generators.
NOTE
If an ICCx bit in the PMFICCTL register changes during a PWM period, the
new value does not take effect until the next PWM period. ICCx bits take
effect at the end of each PWM cycle regardless of the state of the related
LDOKx bit or global load OK.
Table 15-43. Top/Bottom Corrections Selected by ICCn Bits
Bit Logic State Output Control
ICCA 0 IPOLA Controls PWM0/PWM1 Pair
1 PWM Count Direction Controls PWM0/PWM1 Pair
ICCB 0 IPOLB Controls PWM2/PWM3 Pair
1 PWM Count Direction Controls PWM2/PWM3 Pair
ICCC 0 IPOLC Controls PWM4/PWM5 Pair
1 PWM Count Direction Controls PWM4/PWM5 Pair
DESIRED LOAD VOLTAGE
BOTTOM PWM
LOAD VOLTAGE
TOP PWM
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Figure 15-62. Asymmetric Waveform - Phase Shift PWM Output
15.4.8 Variable Edge Placement PWM Output
In complementary edge-aligned mode, the timing of both edges of the PWM output can be controlled using
the PECx bits in the PMFICCTL register and the CINVn bits in the PMFCINV register.
The edge-aligned signal created by the even value register and the associated CINVn bit is ANDed with
the signal created by the odd value register and its associated CINVn bit. The resulting signal can
optionally be negated by PINVx and is then fed into the complement and deadtime logic (Figure 15-63).
If the value of the inverted register exceeds the non-inverted register value, no output pulse is generated
(0% or 100% duty cycle). See right half of Figure 15-64.
In contrast to asymmetric PWM output mode, the PWM phase shift can pass the PWM cycle boundary.
Figure 15-63. Logic AND Function with Signal Inversions
Modulus = 4
0
1
2
3
4
Up/Down Counter
Even PWM
Value = 1
Odd PWM
Value = 3
Even PWM
Value = 3
Odd PWM
Value = 1
Even PWM
Value Odd PWM
Value
Odd PWM
Value Even PWM
Value
PINVA
PWM
GENERATOR 1
PWM
GENERATOR 0
CINV0
CINV1
PECA=1
to complement
COMPSRC
logic and
dead time
insertion
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
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Figure 15-64. Variable Edge Placement Waveform - Phase Shift PWM Output (Edge-Aligned)
15.4.9 Double Switching PWM Output
By using the AND function in Figure 15-63 in complementary center -aligned mode, the PWM output can
be configured for double switching operation (Figure 15-65, Figure 15-66). By setting the non-inverted
value register greater or equal to the PWM modulus the output function can be switched to single pulse
generation on PWM reload cycle basis.
9
8
7
6
5
4
3
2
1
Up Counter
Modulus = 9
PMFVAL0 = 3; CINV0 =1 PMFVAL0 = 6; CINV0 =1
PMFVAL1 = 6; CINV1 =0 PMFVAL1 = 3; CINV1 =0
PWM0 (PINVA=0)
PWM0 (PINVA=1)
0%
100%
EDGEA=1
PECA=1
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
608 Freescale Semiconductor
Figure 15-65. Double-Switching PWM Output VAL0<VAL1 (Center-Aligned)
Figure 15-66. Double-Switching PWM Output VAL0>VAL1 (Center-Aligned)
9
8
7
6
5
4
3
2
1
0
Up/Down Count-
er
Modulus = 9
PMFVAL0 = 3; CINV0 =1
PMFVAL1 = 6; CINV1 =0
PWM0 (PINV=0)
PWM0 (PINV=1)
EDGEA=0
PECA=1
9
8
7
6
5
4
3
2
1
0
Up/Down
Counter
Modulus = 9
PMFVAL0 = 6; CINV0 =1
PMFVAL1 = 3; CINV1 =0
PWM0 (PINV=0)
PWM0 (PINV=1)
EDGEA=0
PECA=1
0%
100%
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 609
15.4.10 Output Polarity
Output polarity of the PWMs is determined by two options: TOPNEG and BOTNEG. The top polarity
option, T OPNEG, controls the polarity of PWM0, PWM2, and PWM4. The bottom polarity option,
BOTNEG, controls the polarity of PWM1, PWM3, and PWM5.
Positive polarity means when the PWM is an active level its output is high. Conversely, negative polarity
means when the PWM is driving an active level its output is low.
If TOPNEG is set, PWM0, PWM2, and PWM4 outputs become active-low. When BOTNEG is set,
PWM1, PWM3, and PWM5 outputs are active-low. When these bits are clear, their respective PWM
outputs are active-high. See Figure 15-67.
Figure 15-67. PWM Polarity
15.4.11 Software Output Control
Setting output control enable bit, OUTCTLn, enables software to drive the PWM outputs instead of the
PWM generator. In independent mode, with OUTCTLn= 1, the output bit OUTn, controls the PWMn
channel. In complementary channel operation the even OUTCTLn bit is used to enable software output
control for the pair. The OUTCTLn bits must be switched in pairs for proper operation. The OUTCTLn
and OUTn bits are in the PWM output control register.
NOTE
During software output control, TOPNEG and BOTNEG still control output
polarity. It will take up to 3 core clock cycles to see the effect of output
control on the PWM outputs.
UP/DOWN COUNTERER
PWM = 0
PWM = 1
PWM = 2
PWM = 3
PWM = 4
EDGE-ALIGNED
MODULUS = 4
UP/DOWN COUNTERER
PWM = 0
PWM = 1
PWM = 2
PWM = 3
PWM = 4
MODULUS = 4
UP COUNTERER
PWM = 0
PWM = 2
PWM = 3
PWM = 4
PWM = 1
MODULUS = 4
CENTER-ALIGNED
POSITIVE POLARITY POSITIVE POLARITY
UP COUNTERER
PWM = 0
PWM = 2
PWM = 3
PWM = 4
PWM = 1
MODULUS = 4
CENTER-ALIGNED
NEGATIVE POLARITY
EDGE-ALIGNED
NEGATIVE POLARITY
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
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In independent PWM operation, setting or clearing the OUTn bit activates or deactivates the PWMn
output.
In complementary channel operation, the even-numbered OUTn bits replace the PWM generator outputs
as inputs to the deadtime generators. Complementary channel pairs still cannot drive active level
simultaneously, and the deadtime generators continue to insert deadtime in both channels of that pair,
whenever an even OUTn bit toggles. Even OUTn bits control the top PWM signals while the odd OUT
bits control the bottom PWM signals with respect to the even OUTn bits. Setting the odd OUTn bit makes
its corresponding PWM the complement of its even pair, while clearing the odd OUTn bit deactivates the
odd PWM.
Setting the OUTCTLn bits does not disable the PWM generators and current status sensing circuitry . They
continue to run, but no longer control the outputs. When the OUTCTLn bits are cleared, the outputs of the
PWM generator become the inputs to the deadtime generators at the beginning of the next PWM cycle.
Software can drive the PWM outputs even when PWM enable bit (PWMENx) is set to zero.
NOTE
Avoid an unexpected deadtime insertion by clearing the OUTn bits before
setting and after clearing the OUTCTLn bits.
Figure 15-68. Setting OUT0 with OUTCTL Set in Complementary Mode
MODULUS = 4
PWM VALUE = 2
DEADTIME = 2
PWM0
PWM1
PWM0 WITH DEADTIME
PWM1 WITH DEADTIME
OUTCTL0
OUT0
PWM0
PWM1
OUT1
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 611
Figure 15-69. Clearing OUT0 with OUTCTL Set in Complementary Mode
Figure 15-70. Setting OUTCTL with OUT0 Set in Complementary Mode
MODULUS = 4
PWM VALUE = 2
DEADTIME = 2
PWM0
PWM1
PWM0 WITH DEADTIME
PWM1 WITH DEADTIME
OUTCTL0
OUT0
PWM0
PWM1
OUT1
MODULUS = 4
PWM VALUE = 2
DEADTIME = 2
PWM0
PWM1
PWM0 WITH DEADTIME
PWM1 WITH DEADTIME
OUTCTL0
OUT0
PWM0
PWM1
OUT1
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
612 Freescale Semiconductor
15.4.12 PWM Generator Loading
15.4.12.1 Load Enable
The load okay bit, LDOK, enables loading the PWM generator with:
A prescaler divisor—from the PRSC bits in PMFFQC register
A PWM period—from the PWM counter modulus registers
A PWM pulse width—from the PWM value registers
LDOK prevents reloading of these PWM parameters before software is finished calculating them. Setting
LDOK allows the prescaler bits, PMFMOD and PMFVAL registers to be loaded into a set of b uf fers. The
loaded buf fers are used by the PWM generator at the beginning of the next PWM reload cycle. Set LDOK
by reading it when it is a logic zero and then writing a logic one to it. After the PWM reload event, LDOK
is automatically cleared.
If LDOK is set in the same cycle as the PWM reload event occurs, then the current buffers will be used
and the LDOK is valid at the next PWM reload event. See Figure 15-71.
If an asserted LDOK bit is attempted to be set again one cycle prior to the PWM reload event, then the
buffers will loaded an d LDOK will be cleared automatically. Else if the write access to the set LDOK bit
occurs in the same cycle with the reload event, the buf fers will also be loaded but the LDOK remains valid
also for the next PWM reload event. See Figure 15-72.
Figure 15-71. Setting cleared LDOK bit at PWM reload event
bus clock
LDOK write
LDOK bit
PWM reload
bus clock
LDOK write
LDOK bit
PWM reload
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 613
Figure 15-72. Setting asserted LDOK bit at PWM reload event
15.4.12.2 Global Load Enable
If a global load enable bit GLDOKA, B, or C is set, the global load OK bit defined on device level as input
to the PMF replaces the function of the related local LDOKA, B, or C bits. The global load OK signal is
typically shared between multiple IP blocks with the same double buffer scheme. Software handling must
be transferred to the global load OK bit at the chip level.
15.4.12.3 Load Frequency
The LDFQ3, LDFQ2, LDFQ1, and LDFQ0 bits in the PWM control register (PMFFQCx) select an
integral loading frequency of 1 to 16-PWM reload opportunities. The LDFQ bits take effect at every PWM
reload opportunity, regardless the state of the related load okay bit or global load OK. The half bit in the
PMFFQC register controls half-cycle reloads for center-aligned PWMs. If the half bit is set, a reload
opportunity occurs at the beginning of every PWM cycle and half cycle when the count equals the
modulus. If the half bit is not set, a reload opportunity occurs only at the beginning of every cycle. Reload
opportunities can only occur at the beginning of a PWM cycle in edge-aligned mode.
NOTE
Setting the half bit takes effect immediately. Depending on whether the
counter is incrementing or decrementing at this point in time, reloads at
even-numbered reload frequencies (every 2, 4, 6,... reload opportunities)
will occur only when the counter matches the modulus or only when the
counter equals zero, respectively (refer to example of reloading at every two
opportunities in Figure 15-74).
NOTE
Loading a new modulus on a half cycle will force the count to the new
modulus value minus one on the next clock cycle. Half cycle reloads are
possible only in center-aligned mode. Enabling or disabling half-cycle
reloads in edge-aligned mode will have no ef fect on the reload rate.
bus clock
LDOK write
LDOK bit
PWM reload
bus clock
LDOK write
LDOK bit
PWM reload
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
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614 Freescale Semiconductor
Figure 15-73. Full Cycle Reload Frequency Change
Figure 15-74. Half Cycle Reload Frequency Change
15.4.12.4 Reload Flag
The PWMRF reload flag is set at every reload opportunity, regardless of whether an actual reload occurs
(as determined by the related LDOK bit or global load OK). If the PWM reload interrupt enable bit
PWMRIE is set, the PWMRF flag generates CPU interrupt requests allowing software to calculate new
PWM parameters in real time. When PWMRIE is not set, reloads still occur at the selected reload rate
without generating CPU interrupt requests.
Figure 15-75. PWMRF Reload Interrupt Request
Figure 15-76. Full-Cycle Center-Aligned PWM Value Loading
RELOAD
CHANGE
UP/DOWN
EVERY
TWO OPPORTUNITIES
EVERY
OPPORTUNITY
COUNTERER
RELOAD
FREQUENCY
EVERY
FOUR OPPORTUNITIES
RELOAD
CHANGE
UP/DOWN
EVERY TWO
OPPORTUNITIES
EVERY
OPPORTUNITY
COUNTERER
RELOAD
FREQUENCY
EVERY TWO
OPPORTUNITIES
EVERY
FOUR OPPORTUNITIES
(HALF bit set
while counting down)
(HALF bit set
while counting up)
(HALF bit set while counting up)
(other case not shown)
VDD
CPU INTERRUPT
PWM RELOAD REQUEST
DQ
CLK
CLR
READ PWMRF AS 1 THEN
WRITE 1 TO PWMRF
RESET
PWMRF
PWMRIE
PWM
HALF = 0, LDFQ[3:0] = 0000 = RELOAD EVERY CYCLE
LDOK = 1
MODULUS = 3
PWM VALUE = 1
PWMRF = 1
0
3
2
1
1
3
2
1
0
3
1
1
UP/DOWN
COUNTERER
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 615
Figure 15-77. Full-Cycle Center-Aligned Modulus Loading
Figure 15-78. Half-Cycle Center-Aligned PWM Value Loading
Figure 15-79. Half-Cycle Center-Aligned Modulus Loading
UP/DOWN
PWM
HALF = 0, LDFQ[3:0] = 0000 = RELOAD EVERY CYCLE
LDOK = 1
MODULUS = 2
PWM VALUE = 1
PWMRF = 1
1
3
1
1
1
2
1
1
1
1
1
1
0
2
1
1
COUNTERER
PWM
HALF = 1, LDFQ[3:0] = 0000 = RELOAD EVERY HALF-CYCLE
LDOK = 1
MODULUS = 3
PWM VALUE = 1
PWMRF = 1
0
3
2
1
1
3
1
1
0
3
3
1
UP/DOWN
COUNTERER
1
3
2
1
0
3
2
1
1
3
3
1
1
3
1
1
UP/DOWN
PWM
HALF = 1, LDFQ[3:0] = 0000 = RELOAD EVERY HALF-CYCLE
LDOK = 1
MODULUS = 2
PWM VALUE = 1
PWMRF = 1
0
3
1
1
0
4
1
1
1
1
1
1
0
2
1
1
COUNTERER
0
2
1
1
1
4
1
1
1
4
1
1
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616 Freescale Semiconductor
Figure 15-80. Edge-Aligned PWM Value Loading
Figure 15-81. Edge-Aligned Modulus Loading
15.4.12.5 Reload Overrun Flag
If a LDOK bit was not set before the PWM reload event, then the related reload overrun error flag is set
(PMFROIFx). If the PWM reload overrun interrupt enable bit PMFROIEx is set, the PMFROIFx flag
generates a CPU interrupt request allowing software to handle the error condition.
Figure 15-82. PMFROIF Reload Overrun Interrupt Request
UP ONLY
PWM
LDFQ[3:0] = 0000 = RELOAD EVERY CYCLE
COUNTERER
LDOK = 1
MODULUS = 3
PWM VALUE = 1
PWMRF = 1
0
3
2
1
1
3
2
1
0
3
1
1
0
3
1
1
UP ONLY
PWM
LDFQ[3:0] = 0000 = RELOAD EVERY CYCLE
LDOK = 1
MODULUS = 3
PWM VALUE = 2
PWMRF = 1
COUNTERER
1
4
2
1
1
2
2
1
0
1
2
1
VDD
CPU INTERRUPT
PWM RELOAD REQUEST
DQ
CLK
CLR
WRITE 1 TO PMFROIF
RESET
PMFROIF
PMFROIE
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 617
15.4.12.6 Synchronization Output (pmf_reload)
The PMF uses reload events to output a synchronization pulse, which can be used as an inpu t to the timer
module. A high-true pulse occurs for each PWM cycle start of the PWM, regardless of the state of the
related LDOK bit or global load OK and load frequency.
15.4.13 Fault Protection
Fault protection can disable any combination of PWM outputs (for all FAULT0-5 inputs) or switch to
output control register PMFOUTF on a fault event (for FAULT4-5 only). Faults are generated by an active
level1 on any of the FAULT inputs. Each FAULT input can be mapped arbitrarily to any of the PWM
outputs.
In complementary mode, if a FAULT4 or FAULT5 event is programmed to switch to output control on a
fault event resulting in a PWM active state on a particular output, then the transition will take place after
deadtime insertion. Thus an asynchronous path to disable the PWM output is not available.
On a fault event the PWM generator continues to run.
The fault decoder affects the PWM outputs selected by the fault logic and the disable mapping register.
The fault protection is enabled even when the PWM is not enabled; therefore, a fault will be latched in and
will be cleared in order to prevent an interrupt when the PWM is enabled.
15.4.13.1 Fault Input Sample Filter
Each fault input has a sample filter to test for fault conditions. After every bus cycle setting the FAULTm
input at logic zero, the filter synchronously samples the input once every four bus cycles. QSMP
determines the number of consecutive samples that must be logic one for a fault to be detected. When a
fault is detected, the corresponding F AULTm flag, FIFm, is set. FIFm can only be cleared by writing a logic
one to it.
If the FIEm, FAULTm interrupt enable bit is set, the FIFm flag generates a CPU interrupt request. The
interrupt request latch remains set until:
Software clears the FIFm flag by writing a logic one to it
Software clears the FIEm bit by writing a logic zero to it
A reset occurs
15.4.13.2 Automatic Fault Recovery
Setting a fault mode bit, FMODm, configures faults from the FAULTm input for automatically reenabling
the PWM outputs.
When FMODm is set, disabled PWM outputs are enabled when the FAULTm input returns to logic zero
and a new PWM half cycle begins. See Figure 15-83. Clearing the FIFm flag does not affect disabled
PWM outputs when FMODm is set.
1. The active input level may be defined or programmable at SoC level. The default for internally connected resources is active-
high. For availability and configurability of fault inputs on pins refer to the device overview section.
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Figure 15-83. Automatic Fault Recovery
15.4.13.3 Manual Fault Recovery
Clearing a fault mode bit, FMODm, configures faults from the FAULTm input for manually reenabling the
PWM outputs:
PWM outputs disabled by the FAULT0 input or the FAULT2 input are enabled by clearing the
corresponding FIFm flag. The time at which the PWM outputs are enabled depends on the
corresponding QSMP bit setting. If QSMPm = 00, the PWM outputs are enabled on the next IP bus
cycle when the logic level dete cted by the filter at the fault input is logic zero. If QSMPm = 01,10
or 11, the PWMs are enabled when the next PWM half cycle begins regardless of the state of the
logic level detected by the filter at the fault. See Figure 15-84 and Figure 15-85.
PWM outputs disabled by the FAULT1 or FAULT3-5 inputs are enabled when
Software clears the corresponding FIFm flag
The filter detects a logic zero on the fault input at the start of the next PWM half cycle
boundary. See Figure 15-86.
Figure 15-84. Manual Fault Recovery (Faults 0 and 2) — QSMP = 00
PWMS ENABLED PWMS DISABLED PWMS ENABLED
FAULT I NPUT
DISABLEDENABLED
PWMS ENABLED
FAULT0 O R
FAULT2
PWMS ENABLED PWMS DISABLED
FIFm CLEARED
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 619
Figure 15-85. Manual Fault Recovery (Faults 0 and 2) — QSMP = 01, 10, or 11
Figure 15-86. Manual Fault Recovery (Faults 1 and 3-5)
NOTE
PWM half-cycle boundaries occur at both the PWM cycle start and when
the counter equals the modulus, so in edge-aligned operation full-cycles and
half-cycles are equal.
NOTE
Fault protection also applies during software output control when the
OUTCTLn bits are set. Fault recovery still occurs at half PWM cycle
boundaries while the PWM generator is engaged, PWMEN equals one. But
the OUTn bits can control the PWM outputs while the PWM generator is
off, PWMEN equals zero. Thus, fault re covery occurs at IPbus cycles while
the PWM generator is off and at the start of PWM cycles when the generator
is engaged.
15.5 Resets
All PMF registers are reset to their default values upon any system reset.
15.6 Clocks
The gated system core clock is the clock source for all PWM generators. The system clock is used as a
clock source for any other logic in this module. The system bus clock is used as clock for specific control
registers and flags (LDOKx, PWMRFx, PMFOUTB).
PWMS ENABLED
FAULT0 O R
FAULT2
PWMS ENABLED PWMS DISABLED
FIFm CLEARED
PWMS ENABLED
FAULT1 O R
FAULT3
PWMS ENABLED PWMS DISABLED
FIFm CLEARED
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
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15.7 Interrupts
This section describes the interrupts generated by the PMF and their individual sources. Vector addresses
and interrupt priorities are defined at SoC-level.
15.8 Initialization and Application Information
15.8.1 Initialization
Initialize all registers; read, then set the related LDOK bit or global load OK before setting the PWMEN
bit. With LDOK set, setting PWMEN for the first time after reset immediately loads the PWM generator
thereby setting the PWMRF flag. PWMRF generates a CPU interrupt request if the PWMRIE bit is set. In
complementary channel operation with current-status correction selected, PWM value registers one, three,
and five control the outputs for the first PWM cycle.
NOTE
Even if LDOK is not set, setting PWMEN also sets the PWMRF flag. To
prevent a CPU interrupt request, clear the PWMRIE bit before setting
PWMEN.
Setting PWMEN for the first time after reset without first setting LDOK loads a prescaler divisor of one,
a PWM value of 0x0000, and an unknown modulus.
The PWM generator uses the last values loaded if PWMEN is cleared and then set while LDOK equals
zero.
Initializing the deadtime register, after setting PWMEN or OUTCTLn, can cause an improper deadtime
insertion. However, the deadtime can never be shorter than the specified value.
Table 15-44. PMF Interrupt Sources
Module Interrupt Sources
(Interrupt Vector) Associated Flags Local Enable
PMF reload A PWMRFA PMFENCA[PWMRIEA]
PMF reload B(1)
1. If MTG=0: Interrupt mirrors PMF reload A interrupt
PWMRFB PMFENCB[PWMRIEB]
PMF reload C1PWMRFC PMFENCC[PWMRIEC]
PMF fault PMFFIF[FIF0]
PMFFIF[FIF1]
PMFFIF[FIF2]
PMFFIF[FIF3]
PMFFIE[FIE0]
PMFFIE[FIE1]
PMFFIE[FIE2]
PMFFIE[FIE3]
PMF reload overrun PMFROIF[PMFROIFA]
PMFROIF[PMFROIFB]
PMFROIF[PMFROIFC]
PMFROIE[PMFROIEA]
PMFROIE[PMFROIEB]
PMFROIE[PMFROIEC]
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Figure 15-87. PWMEN and PWM Outputs in Independent Operation
Figure 15-88. PWMEN and PWM Outputs in Complementary Operation
When the PWMEN bit is cleared:
The PWMn outputs lose priority on associated outputs unless OUTCTLn = 1
The PWM counter is cleared and does not count
The PWM generator forces its outputs to zero
The PWMRF flag and pending CPU interrupt requests are not cleared
All fault circuitry remains active unless FENm = 0
Software output control remains active
Deadtime insertion continues during software output control
15.8.1.1 Register Write Protection
The following configuration registers and bits can be write protected:
PMFCFG0, PMFCFG1, PMFCFG3, PMFFEN, PMFQSMP0-1, PMFENCA[RSTRTA,GLDOKA],
PMFENCB[RSTRTB,GLDOKB], PMFENCC[RSTRTC,GLDOKC], PMFDTMA,B,C, PMFDMP0-5,
PMFOUTF
NOTE
Make sure to set the write protection bit WP in PMFCFG0 after configuring
and prior to enabling PWM outputs and fault inputs.
15.8.2 BLDC 6-Step Commutation
15.8.2.1 Unipolar Switching Mode
Unipolar switching mode uses registers PMFOUTC and PMFOUTB to perform commutation.
HI-Z
ACTIVE HI-Z
IPBus
PWMEN
PWM
CLOCK
BIT
OUTPUTS
HI-Z
ACTIVE
IPBus
PWMEN
PWM
CLOCK
BIT
OUTPUTS
HI-Z
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Table 15-45. Effects of OUTCTL and OUT Bits on PWM Output Pair in Complementary Mode
The recommended setup is:
PMFCFG0[INDEPC,INDEPB,INDEPA] = 0x0; // Complementary mode
PMFCFG1[ENCE] = 1; // Enable commutation event
PMFOUTB = 0x2A; // Set return path pattern, high-side off, low-side on
PMFOUTC = 0x1C; // Branch A->B, “mask” C // 0°
The commutation sequence is:
PMFOUTC = 0x34; // Branch A->C, “mask” B // 60°
PMFOUTC = 0x31; // Branch B->C, “mask” A // 120°
PMFOUTC = 0x13; // Branch B->A, “mask” C // 180°
PMFOUTC = 0x07; // Branch C->A, “mask” B // 240°
PMFOUTC = 0x0D; // Branch C->B, “mask” A // 300°
PMFOUTC = 0x1C; // Branch A->B, “mask” C // 360°
Table 15-46. Unipolar Switching Sequence
15.8.2.2 Bipolar Switching Mode
Bipolar switching mode uses register bits MSK5-0 and PINVA, B, C to perform commutation.
The recommended setup is:
PMFCFG0[INDEPC,INDEPB,INDEPA] = 0x0; // Complementary mode
PMFCFG1[ENCE] = 1; // Enable commutation event
PMFCFG2[MSK5:MSK0] = 0x30; // Branch A<->B, mask C // 0°
PMFCFG3[PINVC,PINVB,PINVA] = 0x2; // Invert B
The commutation sequence is:
PMFCFG2[MSK5:MSK0] = 0x03; // Branch C<->B, mask A // 60°
PMFCFG3[PINVC,PINVB,PINVA] = 0x2; // Invert B
OUTCTL
(odd,even)
OUT
(odd,even)
PWM
(odd)
PWM
(even)
00 xx PWMgen(even) PWMgen(even)
11 10 OUTB(even)=1 OUTB(even)=0
01 x0 0 OUTB(even)=0
Branch Channel 0°60°120°180°240°300°
APWM0PWMgen000
PWM1 PWMgen 010
BPWM2 0 0 PWMgen 0 0
PWM3 1 0 PWMgen 01
CPWM4000PWMgen
PWM5 0 1 0 PWMgen
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Freescale Semiconductor 623
PMFCFG2[MSK5:MSK0] = 0x0c; // Branch C<->A, mask B // 120°
PMFCFG3[PINVC,PINVB,PINVA] = 0x1; // Invert A
PMFCFG2[MSK5:MSK0] = 0x30; // Branch B<->A, mask C // 180°
PMFCFG3[PINVC,PINVB,PINVA] = 0x1; // Invert A
PMFCFG2[MSK5:MSK0] = 0x03; // Branch B<->C, mask A // 240°
PMFCFG3[PINVC,PINVB,PINVA] = 0x4; // Invert C
PMFCFG2[MSK5:MSK0] = 0x0c; // Branch A<->C, mask B // 300°
PMFCFG3[PINVC,PINVB,PINVA] = 0x4; // Invert C
PMFCFG2[MSK5:MSK0] = 0x30; // Branch A<->B, mask A // 360°
PMFCFG3[PINVC,PINVB,PINVA] = 0x2; // Invert B
Table 15-47. Bipolar Switching Sequence
Branch Channel 0°60°120°180°240°300°
A PWM0 PWMgen Masked PWMgen Masked PWMgen
PWM1 PWMgen Masked PWMgen Masked PWMgen
BPWM2 PWMgen Masked PWMgen Masked
PWM3 PWMgen Masked PWMgen Masked
C PWM4 Masked PWMgen Masked PWMgen
PWM5 Masked PWMgen Masked PWMgen
Chapter 15 Pulse Width Modulator with Fault Protection (PMF15B6CV4)
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MC9S12ZVM Family Reference Manual Rev. 2.2
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Chapter 16
Serial Communication Interface (S12SCIV6)
16.1 Introduction
This block guide provides an overview of the serial communication interface (SCI) module.
The SCI allows asynchronous serial communications with peripheral devices and other CPUs.
16.1.1 Glossary
IR: InfraRed
IrDA: Infrared Design Associate
IRQ: Interrupt Request
LIN: Local Interconnect Network
LSB: Least Significant Bit
MSB: Most Significant Bit
NRZ: Non-Return-to-Zero
RZI: Return-to-Zero-Inverted
Table 16-1. Revision History
Version
Number
Revision
Date
Effective
Date Author Description of Changes
06.01 05/29/2012 update register map, change BD,move IREN to SCIACR2
06.02 10/17/2012
fix typo on page 16-630 and on page 16-630;fix typo of
version V6
update fast data tolerance calculation and add notes.
06.03 10/25/2012 fix typo Table 16-2, SBR[15:4],not SBR[15:0]
06.04 12/19/2012 fix typo Table 16-6,16.4.1/16-643
06.05 02/22/2013 fix typo Figure 16-1./16-627 Figure 16-4./16-630
update Table 16-2./16-630 16.4.4/16-645 16.4.6.3/16-652
06.06 03/11/2013 fix typo of BDL reset value,Figure 16-4
fix typo of Table 16-2,Table 16-16,reword 16.4.4/16-645
06.07 09/03/2013
update Figure 16-14./16-642 Figure 16-16./16-646
Figure 16-20./16-651
update 16.4.4/16-645,more detail for two baud
add note for Table 16-16./16-645
update Figure 16-2./16-629,Figure 16-12./16-640
Chapter 16 Serial Communication Interface (S12SCIV6)
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RXD: Receive Pin
SCI : Serial Communication Interface
TXD: Transmit Pin
16.1.2 Features
The SCI includes these distinctive features:
Full-duplex or single-wire operation
Standard mark/space non-return-to-zero (NRZ) format
Selectable IrDA 1.4 return-to-zero-inverted (RZI) format with programmable pulse widths
16-bit baud rate selection
Programmable 8-bit or 9-bit data format
Separately enabled transmitter and receiver
Programmable polarity for transmitter and receiver
Programmable transmitter output parity
Two receiver wakeup methods:
Idle line wakeup
Address mark wakeup
Interrupt-driven operation with eight flags:
Transmitter empty
Transmission complete
Receiver full
Idle receiver input
Receiver overrun
Noise error
Framing error
Parity error
Receive wakeup on active edge
Transmit collision detect supporting LIN
Break Detect supporting LIN
Receiver framing error detection
Hardware parity checking
1/16 bit-time noise detection
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16.1.3 Modes of Operation
The SCI functions the same in normal, special, and emulation modes. It has two low power modes, wait
and stop modes.
Run mode
Wait mode
Stop mode
16.1.4 Block Diagram
Figure 16-1 is a high level block diagram of the SCI module, showing the interaction of various function
blocks.
Figure 16-1. SCI Block Diagram
SCI Data Register
RXD Data In
Data Out TXD
Receive Shift Register
Infrared
Decoder
Receive & Wakeup
Control
Data Format Control
Transmit Control
Bus Clock
1/16
Transmit Shift Register
SCI Data Register
Receive
Interrupt
Generation
Transmit
Interrupt
Generation
Infrared
Encoder
IDLE
RDRF/OR
TC
TDRE
BRKD
BERR
RXEDG
SCI
Interrupt
Request
Baud Rate
Generator
Receive
Baud Rate
Transmit
Generator
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16.2 External Signal Description
The SCI module has a total of two external pins.
16.2.1 TXD — Transmit Pin
The TXD pin transmits SCI (standard or infrared) data. It will idle high in either mode and is high
impedance anytime the transmitter is disabled.
16.2.2 RXD — Receive Pin
The RXD pin receives SCI (standard or infrared) data. An idle line is detected as a line high . This input is
ignored when the receiver is disabled and should be terminated to a known voltage.
16.3 Memory Map and Register Definition
This section provides a detailed description of all the SCI registers.
16.3.1 Module Memory Map and Register Definition
The memory map for the SCI module is given below in Figure 16-2. The address listed for each register
is the address offset. The total address for each register is the sum of the base address for the SCI module
and the address offset for each register.
Chapter 16 Serial Communication Interface (S12SCIV6)
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16.3.2 Register Descriptions
This section consists of register descriptions in address order . Each description includes a standard register
diagram with an associated figure number. Writes to a reserved register locations do not have any effect
and reads of these locations return a zero. Details of register bit and field function follow the register
diagrams, in bit order.
Register
Name Bit 7654321Bit 0
0x0000
SCIBDH1RSBR15 SBR14 SBR13 SBR12 SBR11 SBR10 SBR9 SBR8
W
0x0001
SCIBDL1RSBR7 SBR6 SBR5 SBR4 SBR3 SBR2 SBR1 SBR0
W
0x0002
SCICR11RLOOPS SCISWAI RSRC M WAKE ILT PE PT
W
0x0000
SCIASR12RRXEDGIF 0000
BERRV BERRIF BKDIF
W
0x0001
SCIACR12RRXEDGIE 00000
BERRIE BKDIE
W
0x0002
SCIACR22RIREN TNP1 TNP0 00
BERRM1 BERRM0 BKDFE
W
0x0003
SCICR2
RTIE TCIE RIE ILIE TE RE RWU SBK
W
0x0004
SCISR1
R TDRE TC RDRF IDLE OR NF FE PF
W
0x0005
SCISR2
RAMAP 00
TXPOL RXPOL BRK13 TXDIR RAF
W
0x0006
SCIDRH
RR8 T8 000
Reserved Reserved Reserved
W
0x0007
SCIDRL
RR7R6R5R4R3R2R1R0
WT7T6T5T4T3T2T1T0
1.These registers are accessible if the AMAP bit in the SCISR2 register is set to zero.
2,These registers are accessible if the AMAP bit in the SCISR2 register is set to one.
= Unimplemented or Reserved
Figure 16-2. SCI Register Summary
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16.3.2.1 SCI Baud Rate Registers (SCIBDH, SCIBDL)
Read: Anytime, if AMAP = 0.
Write: Anytime, if AMAP = 0.
NOTE
Those two registers are only visible in the memory map if AMAP = 0 (reset
condition).
The SCI baud rate register is used by to determine the baud rate of the SCI, and to control the infrared
modulation/demodulation submodule.
Module Base + 0x0000
76543210
RSBR15 SBR14 SBR13 SBR12 SBR11 SBR10 SBR9 SBR8
W
Reset00000000
Figure 16-3. SCI Baud Rate Register (SCIBDH)
Module Base + 0x0001
76543210
RSBR7 SBR6 SBR5 SBR4 SBR3 SBR2 SBR1 SBR0
W
Reset01000000
Figure 16-4. SCI Baud Rate Register (SCIBDL)
Table 16-2. SCIBDH and SCIBDL Field Descriptions
Field Description
SBR[15:0] SCI Baud Rate Bits — The baud rate for the SCI is determined by the bits in this register. The baud rate is
calculated two different ways depending on the state of the IREN bit.
The formulas for calculating the baud rate are:
When IREN = 0 then,
SCI baud rate = SCI bus clock / (SBR[15:0])
When IREN = 1 then,
SCI baud rate = SCI bus clock / (2 x SBR[15:1])
Note: The baud rate generator is disabled after reset and not started until the TE bit or the RE bit is set for the
first time. The baud rate generator is disabled when (SBR[15:4] = 0 and IREN = 0) or (SBR[15:5] = 0 and
IREN = 1).
Note: . User should write SCIBD by word access. The updated SCIBD may take effect until next RT clock start,
write SCIBDH or SCIBDL separately may cause baud generator load wrong data at that time,if second
write later then RT clock.
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16.3.2.2 SCI Control Register 1 (SCICR1)
Read: Anytime, if AMAP = 0.
Write: Anytime, if AMAP = 0.
NOTE
This register is only visible in the memory map if AMAP = 0 (reset
condition).
Module Base + 0x0002
76543210
RLOOPS SCISWAI RSRC M WAKE ILT PE PT
W
Reset00000000
Figure 16-5. SCI Control Register 1 (SCICR1)
Table 16-3. SCICR1 Field Descriptions
Field Description
7
LOOPS
Loop Select Bit LOOPS enables loop operation. In loop operation, the RXD pin is disconnected from the SCI
and the transmitter output is internally connected to the receiver input. Both the transmitter and the receiver must
be enabled to use the loop function.
0 Normal operation enabled
1 Loop operation enabled
The receiver input is determined by the RSRC bit.
6
SCISWAI
SCI Stop in Wait Mode Bit — SCISWAI disables the SCI in wait mode.
0 SCI enabled in wait mode
1 SCI disabled in wait mode
5
RSRC
Receiver Source Bit — When LOOPS = 1, the RSRC bit determines the source for the receiver shift register
input. See Table 16-4.
0 Receiver input internally connected to transmitter output
1 Receiver input connected externally to transmitter
4
M
Data Format Mode Bit — MODE determines whether data characters are eight or nine bits long.
0 One start bit, eight data bits, one stop bit
1 One start bit, nine data bits, one stop bit
3
WAKE
Wakeup Condition Bit WAKE determines which condition wakes up the SCI: a logic 1 (address mark) in the
most significant bit position of a received data character or an idle condition on the RXD pin.
0 Idle line wakeup
1 Address mark wakeup
2
ILT
Idle Line Type Bit — ILT determines when the receiver starts counting logic 1s as idle character bits. The
counting begins either after the start bit or after the stop bit. If the count begins after the start bit, then a string of
logic 1s preceding the stop bit may cause false recognition of an idle character. Beginning the count after the
stop bit avoids false idle character recognition, but requires properly synchronized transmissions.
0 Idle character bit count begins after start bit
1 Idle character bit count begins after stop bit
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1
PE
Parity Enable Bit — PE enables the parity function. When enabled, the parity function inserts a parity bit in the
most significant bit position.
0 Parity function disabled
1 Parity function enabled
0
PT
Parity Type Bit PT determines whether the SCI generates and checks for even parity or odd parity. With even
parity, an even number of 1s clears the parity bit and an odd number of 1s sets the parity bit. With odd parity, an
odd number of 1s clears the parity bit and an even number of 1s sets the parity bit.
0 Even parity
1 Odd parity
Table 16-4. Loop Functions
LOOPS RSRC Function
0 x Normal operation
1 0 Loop mode with transmitter output internally connected to receiver input
1 1 Single-wire mode with TXD pin connected to receiver input
Table 16-3. SCICR1 Field Descriptions (continued)
Field Description
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16.3.2.3 SCI Alternative Status Register 1 (SCIASR1)
Read: Anytime, if AMAP = 1
Write: Anytime, if AMAP = 1
Module Base + 0x0000
76543210
RRXEDGIF 0000BERRV
BERRIF BKDIF
W
Reset00000000
= Unimplemented or Reserved
Figure 16-6. SCI Alternative Status Register 1 (SCIASR1)
Table 16-5. SCIASR1 Field Descriptions
Field Description
7
RXEDGIF
Receive Input Active Edge Interrupt Flag — RXEDGIF is asserted, if an active edge (falling if RXPOL = 0,
rising if RXPOL = 1) on the RXD input occurs. RXEDGIF bit is cleared by writing a “1” to it.
0 No active receive on the receive input has occurred
1 An active edge on the receive input has occurred
2
BERRV
Bit Error Value — BERRV reflects the state of the RXD input when the bit error detect circuitry is enabled and
a mismatch to the expected value happened. The value is only meaningful, if BERRIF = 1.
0 A low input was sampled, when a high was expected
1 A high input reassembled, when a low was expected
1
BERRIF
Bit Error Interrupt Flag — BERRIF is asserted, when the bit error detect circuitry is enabled and if the value
sampled at the RXD input does not match the transmitted value. If the BERRIE interrupt enable bit is set an
interrupt will be generated. The BERRIF bit is cleared by writing a “1” to it.
0 No mismatch detected
1 A mismatch has occurred
0
BKDIF
Break Detect Interrupt Flag — BKDIF is asserted, if the break detect circuitry is enabled and a break signal is
received. If the BKDIE interrupt enable bit is set an interrupt will be generated. The BKDIF bit is cleared by writing
a “1” to it.
0 No break signal was received
1 A break signal was received
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16.3.2.4 SCI Alternative Control Register 1 (SCIACR1)
Read: Anytime, if AMAP = 1
Write: Anytime, if AMAP = 1
Module Base + 0x0001
76543210
RRXEDGIE 00000
BERRIE BKDIE
W
Reset00000000
= Unimplemented or Reserved
Figure 16-7. SCI Alternative Control Register 1 (SCIACR1)
Table 16-6. SCIACR1 Field Descriptions
Field Description
7
RXEDGIE
Receive Input Active Edge Interrupt Enable RXEDGIE enables the receive input active edge interrupt flag,
RXEDGIF, to generate interrupt requests.
0 RXEDGIF interrupt requests disabled
1 RXEDGIF interrupt requests enabled
1
BERRIE
Bit Error Interrupt Enable — BERRIE enables the bit error interrupt flag, BERRIF, to generate interrupt
requests.
0 BERRIF interrupt requests disabled
1 BERRIF interrupt requests enabled
0
BKDIE
Break Detect Interrupt Enable — BKDIE enables the break detect interrupt flag, BKDIF, to generate interrupt
requests.
0 BKDIF interrupt requests disabled
1 BKDIF interrupt requests enabled
Chapter 16 Serial Communication Interface (S12SCIV6)
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16.3.2.5 SCI Alternative Control Register 2 (SCIACR2)
Read: Anytime, if AMAP = 1
Write: Anytime, if AMAP = 1
Module Base + 0x0002
76543210
RIREN TNP1 TNP0 00
BERRM1 BERRM0 BKDFE
W
Reset00000000
= Unimplemented or Reserved
Figure 16-8. SCI Alternative Control Register 2 (SCIACR2)
Table 16-7. SCIACR2 Field Descriptions
Field Description
7
IREN
Infrared Enable Bit — This bit enables/disables the infrared modulation/demodulation submodule.
0 IR disabled
1 IR enabled
6:5
TNP[1:0]
Transmitter Narrow Pulse Bits These bits enable whether the SCI transmits a 1/16, 3/16, 1/32 or 1/4 narrow
pulse. See Table 16-8.
2:1
BERRM[1:0]
Bit Error Mode — Those two bits determines the functionality of the bit error detect feature. See Table 16-9.
0
BKDFE
Break Detect Feature EnableBKDFE enables the break detect circuitry.
0 Break detect circuit disabled
1 Break detect circuit enabled
Table 16-8. IRSCI Transmit Pulse Width
TNP[1:0] Narrow Pulse Width
11 1/4
10 1/32
01 1/16
00 3/16
Table 16-9. Bit Error Mode Coding
BERRM1 BERRM0 Function
0 0 Bit error detect circuit is disabled
0 1 Receive input sampling occurs during the 9th time tick of a transmitted bit
(refer to Figure 16-19)
1 0 Receive input sampling occurs during the 13th time tick of a transmitted bit
(refer to Figure 16-19)
11Reserved
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16.3.2.6 SCI Control Register 2 (SCICR2)
Read: Anytime
Write: Anytime
Module Base + 0x0003
76543210
RTIE TCIE RIE ILIE TE RE RWU SBK
W
Reset00000000
Figure 16-9. SCI Control Register 2 (SCICR2)
Table 16-10. SCICR2 Field Descriptions
Field Description
7
TIE
Transmitter Interrupt Enable Bit — TIE enables the transmit data register empty flag, TDRE, to generate
interrupt requests.
0 TDRE interrupt requests disabled
1 TDRE interrupt requests enabled
6
TCIE
Transmission Complete Interrupt Enable Bit TCIE enables the transmission complete flag, TC, to generate
interrupt requests.
0 TC interrupt requests disabled
1 TC interrupt requests enabled
5
RIE
Receiver Full Interrupt Enable Bit RIE enables the receive data register full flag, RDRF, or the overrun flag,
OR, to generate interrupt requests.
0 RDRF and OR interrupt requests disabled
1 RDRF and OR interrupt requests enabled
4
ILIE
Idle Line Interrupt Enable BitILIE enables the idle line flag, IDLE, to generate interrupt requests.
0 IDLE interrupt requests disabled
1 IDLE interrupt requests enabled
3
TE
Transmitter Enable Bit — TE enables the SCI transmitter and configures the TXD pin as being controlled by
the SCI. The TE bit can be used to queue an idle preamble.
0 Transmitter disabled
1 Transmitter enabled
2
RE
Receiver Enable Bit RE enables the SCI receiver.
0 Receiver disabled
1 Receiver enabled
1
RWU
Receiver Wakeup Bit — Standby state
0 Normal operation.
1 RWU enables the wakeup function and inhibits further receiver interrupt requests. Normally, hardware wakes
the receiver by automatically clearing RWU.
0
SBK
Send Break Bit — Toggling SBK sends one break character (10 or 11 logic 0s, respectively 13 or 14 logics 0s
if BRK13 is set). Toggling implies clearing the SBK bit before the break character has finished transmitting. As
long as SBK is set, the transmitter continues to send complete break characters (10 or 11 bits, respectively 13
or 14 bits).
0 No break characters
1 Transmit break characters
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16.3.2.7 SCI Status Register 1 (SCISR1)
The SCISR1 and SCISR2 registers provides inputs to the MCU for generation of SCI interrupts. Also,
these registers can be polled by the MCU to check the status of these bits. The flag-clearing procedures
require that the status register be read followed by a read or write to the SCI data register.It is permissible
to execute other instructions between the two steps as long as it does not compromise the handling of I/O,
but the order of operations is important for flag clearing.
Read: Anytime
Write: Has no meaning or effect
Module Base + 0x0004
76543210
R TDRE TC RDRF IDLE OR NF FE PF
W
Reset11000000
= Unimplemented or Reserved
Figure 16-10. SCI Status Register 1 (SCISR1)
Table 16-11. SCISR1 Field Descriptions
Field Description
7
TDRE
Transmit Data Register Empty Flag — TDRE is set when the transmit shift register receives a byte from the
SCI data register. When TDRE is 1, the transmit data register (SCIDRH/L) is empty and can receive a new value
to transmit.Clear TDRE by reading SCI status register 1 (SCISR1), with TDRE set and then writing to SCI data
register low (SCIDRL).
0 No byte transferred to transmit shift register
1 Byte transferred to transmit shift register; transmit data register empty
6
TC
Transmit Complete Flag — TC is set low when there is a transmission in progress or when a preamble or break
character is loaded. TC is set high when the TDRE flag is set and no data, preamble, or break character is being
transmitted.When TC is set, the TXD pin becomes idle (logic 1). Clear TC by reading SCI status register 1
(SCISR1) with TC set and then writing to SCI data register low (SCIDRL). TC is cleared automatically when data,
preamble, or break is queued and ready to be sent. TC is cleared in the event of a simultaneous set and clear of
the TC flag (transmission not complete).
0 Transmission in progress
1 No transmission in progress
5
RDRF
Receive Data Register Full FlagRDRF is set when the data in the receive shift register transfers to the SCI
data register. Clear RDRF by reading SCI status register 1 (SCISR1) with RDRF set and then reading SCI data
register low (SCIDRL).
0 Data not available in SCI data register
1 Received data available in SCI data register
4
IDLE
Idle Line Flag IDLE is set when 10 consecutive logic 1s (if M = 0) or 11 consecutive logic 1s (if M =1) appear
on the receiver input. Once the IDLE flag is cleared, a valid frame must again set the RDRF flag before an idle
condition can set the IDLE flag.Clear IDLE by reading SCI status register 1 (SCISR1) with IDLE set and then
reading SCI data register low (SCIDRL).
0 Receiver input is either active now or has never become active since the IDLE flag was last cleared
1 Receiver input has become idle
Note: When the receiver wakeup bit (RWU) is set, an idle line condition does not set the IDLE flag.
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3
OR
Overrun Flag — OR is set when software fails to read the SCI data register before the receive shift register
receives the next frame. The OR bit is set immediately after the stop bit has been completely received for the
second frame. The data in the shift register is lost, but the data already in the SCI data registers is not affected.
Clear OR by reading SCI status register 1 (SCISR1) with OR set and then reading SCI data register low
(SCIDRL).
0 No overrun
1Overrun
Note: OR flag may read back as set when RDRF flag is clear. This may happen if the following sequence of
events occurs:
1. After the first frame is received, read status register SCISR1 (returns RDRF set and OR flag clear);
2. Receive second frame without reading the first frame in the data register (the second frame is not
received and OR flag is set);
3. Read data register SCIDRL (returns first frame and clears RDRF flag in the status register);
4. Read status register SCISR1 (returns RDRF clear and OR set).
Event 3 may be at exactly the same time as event 2 or any time after. When this happens, a dummy
SCIDRL read following event 4 will be required to clear the OR flag if further frames are to be received.
2
NF
Noise FlagNF is set when the SCI detects noise on the receiver input. NF bit is set during the same cycle as
the RDRF flag but does not get set in the case of an overrun. Clear NF by reading SCI status register 1(SCISR1),
and then reading SCI data register low (SCIDRL).
0 No noise
1Noise
1
FE
Framing Error FlagFE is set when a logic 0 is accepted as the stop bit. FE bit is set during the same cycle
as the RDRF flag but does not get set in the case of an overrun. FE inhibits further data reception until it is
cleared. Clear FE by reading SCI status register 1 (SCISR1) with FE set and then reading the SCI data register
low (SCIDRL).
0 No framing error
1 Framing error
0
PF
Parity Error Flag PF is set when the parity enable bit (PE) is set and the parity of the received data does not
match the parity type bit (PT). PF bit is set during the same cycle as the RDRF flag but does not get set in the
case of an overrun. Clear PF by reading SCI status register 1 (SCISR1), and then reading SCI data register low
(SCIDRL).
0 No parity error
1 Parity error
Table 16-11. SCISR1 Field Descriptions (continued)
Field Description
Chapter 16 Serial Communication Interface (S12SCIV6)
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16.3.2.8 SCI Status Register 2 (SCISR2)
Read: Anytime
Write: Anytime
Module Base + 0x0005
76543210
RAMAP 00
TXPOL RXPOL BRK13 TXDIR RAF
W
Reset00000000
= Unimplemented or Reserved
Figure 16-11. SCI Status Register 2 (SCISR2)
Table 16-12. SCISR2 Field Descriptions
Field Description
7
AMAP
Alternative Map This bit controls which registers sharing the same address space are accessible. In the reset
condition the SCI behaves as previous versions. Setting AMAP=1 allows the access to another set of control and
status registers and hides the baud rate and SCI control Register 1.
0 The registers labelled SCIBDH (0x0000),SCIBDL (0x0001), SCICR1 (0x0002) are accessible
1 The registers labelled SCIASR1 (0x0000),SCIACR1 (0x0001), SCIACR2 (0x00002) are accessible
4
TXPOL
Transmit Polarity — This bit control the polarity of the transmitted data. In NRZ format, a one is represented by
a mark and a zero is represented by a space for normal polarity, and the opposite for inverted polarity. In IrDA
format, a zero is represented by short high pulse in the middle of a bit time remaining idle low for a one for normal
polarity, and a zero is represented by short low pulse in the middle of a bit time remaining idle high for a one for
inverted polarity.
0 Normal polarity
1 Inverted polarity
3
RXPOL
Receive Polarity — This bit control the polarity of the received data. In NRZ format, a one is represented by a
mark and a zero is represented by a space for normal polarity, and the opposite for inverted polarity. In IrDA
format, a zero is represented by short high pulse in the middle of a bit time remaining idle low for a one for normal
polarity, and a zero is represented by short low pulse in the middle of a bit time remaining idle high for a one for
inverted polarity.
0 Normal polarity
1 Inverted polarity
2
BRK13
Break Transmit Character Length — This bit determines whether the transmit break character is 10 or 11 bit
respectively 13 or 14 bits long. The detection of a framing error is not affected by this bit.
0 Break character is 10 or 11 bit long
1 Break character is 13 or 14 bit long
1
TXDIR
Transmitter Pin Data Direction in Single-Wire Mode — This bit determines whether the TXD pin is going to
be used as an input or output, in the single-wire mode of operation. This bit is only relevant in the single-wire
mode of operation.
0 TXD pin to be used as an input in single-wire mode
1 TXD pin to be used as an output in single-wire mode
0
RAF
Receiver Active Flag — RAF is set when the receiver detects a logic 0 during the RT1 time period of the start
bit search. RAF is cleared when the receiver detects an idle character.
0 No reception in progress
1 Reception in progress
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640 Freescale Semiconductor
16.3.2.9 SCI Data Registers (SCIDRH, SCIDRL)
Read: Anytime; reading accesses SCI receive data register
Write: Anytime; writing accesses SCI transmit data register; writing to R8 has no effect
NOTE
The reserved bit SCIDRH[2:0] are designed for factory test purposes only,
and are not intended for general user access. Writing to these bit is possible
when in special mode and can alter the modules functionality.
NOTE
If the value of T8 is the same as in the previous transmission, T8 does not
have to be rewritten.The same value is transmitted until T8 is rewritten
In 8-bit data format, only SCI data register low (SCIDRL) needs to be
accessed.
Module Base + 0x0006
76543210
RR8 T8 000
Reserved Reserved Reserved
W
Reset00000000
= Unimplemented or Reserved
Figure 16-12. SCI Data Registers (SCIDRH)
Module Base + 0x0007
76543210
RR7R6R5R4R3R2R1R0
WT7 T6 T5 T4 T3 T2 T1 T0
Reset00000000
Figure 16-13. SCI Data Registers (SCIDRL)
Table 16-13. SCIDRH and SCIDRL Field Descriptions
Field Description
SCIDRH
7
R8
Received Bit 8 — R8 is the ninth data bit received when the SCI is configured for 9-bit data format (M = 1).
SCIDRH
6
T8
Transmit B it 8 — T8 is the ninth data bit transmitted when the SCI is configured for 9-bit data format (M = 1).
SCIDRL
7:0
R[7:0]
T[7:0]
R7:R0 — Received bits seven through zero for 9-bit or 8-bit data formats
T7:T0 — Transmit bits seven through zero for 9-bit or 8-bit formats
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 641
When transmitting in 9-bit data format and using 8-bit write instructions,
write first to SCI data register high (SCIDRH), then SCIDRL.
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
642 Freescale Semiconductor
16.4 Functional Description
This section provides a complete functional description of the SCI block, detailing the operation of the
design from the end user perspective in a number of subsections.
Figure 16-14 shows the structure of the SCI module. The SCI allows full duplex, asynchronous, serial
communication between the CPU and remote devices, including other CPUs. The SCI transmitter and
receiver operate independently, although they use the same baud rate generator. The CPU monitors the
status of the SCI, writes the data to be transmitted, and processes received data.
Figure 16-14. Detailed SCI Block Diagram
SCI Data
Receive
Shift Register
SCI Data
Register
Transmit
Shift Register
Register
Receive
Generator
SBR15:SBR0
Bus
Transmit
Control
16
Receive
and Wakeup
Data Format
Control
Control
T8
PF
FE
NF
RDRF
IDLE
TIE
OR
TCIE
TDRE
TC
R8
RAF
LOOPS
RWU
RE
PE
ILT
PT
WAKE
M
Clock
ILIE
RIE
RXD
RSRC
SBK
LOOPS
TE
RSRC
IREN
R16XCLK
Ir_RXD
TXD
Ir_TXD
R16XCLK
R32XCLK
TNP[1:0] IREN
Transmit
Encoder
Receive
Decoder
SCRXD
SCTXD
Infrared
Infrared
TC
TDRE
RDRF/OR
IDLE
Active Edge
Detect
Break Detect
RXD
BKDFE
BERRM[1:0]
BKDIE
BKDIF
RXEDGIE
RXEDGIF
BERRIE
BERRIF
SCI
Interrupt
Request
LIN Transmit
Collision
Detect
Generator
Baud Rate
Baud Rate
Transmit
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 643
16.4.1 Infrared Interface Submodule
This module provides the capability of transmitting narrow pulses to an IR LED and receiving narrow
pulses and transforming them to serial bits, which are sent to the SCI. The IrDA physical layer
specification defines a half-duplex infrared communication link for exchange data. The full standard
includes data rates up to 16 Mbits/s. This design covers only data rates between 2.4 Kbits/s and 115.2
Kbits/s.
The infrared submodule consists of two major blocks: the transmit encoder and the receive decoder. The
SCI transmits serial bits of data which are encoded by the infrared submodule to transmit a narrow pulse
for every zero bit. No pulse is transmitted for every one bit. When receiving data, the IR pulses should be
detected using an IR photo diode and transformed to CMOS levels by the IR receive decoder (external
from the MCU). The narrow pulses are then stretched by the infrared submodule to get back to a serial bit
stream to be received by the SCI.The polarity of transmitted pulses and expected receive pulses can be
inverted so that a direct connection can be made to external IrDA transceiver mod ules that use activ e low
pulses.
The infrared submodule receives its clock sources from the SCI. One of these two clocks are selected in
the infrared submodule in order to generate either 3/16, 1/16, 1/32 or 1/4 narrow pulses during
transmission. The infrared block receives two clock sources from the SCI, R16XCLK and R32XCLK,
which are configured to generate the narrow pulse width during transmission. The R16XCLK and
R32XCLK are internal clocks with frequencies 16 and 32 times the baud rate respectively. Both
R16XCLK and R32XCLK clocks are used for transmitting data. The receive decoder uses only the
R16XCLK clock.
16.4.1.1 Infrared Transmit Encoder
The infrared transmit encoder converts serial bits of data from transmit shift register to the TXD pin. A
narrow pulse is transmitted for a zero bit and no pulse for a one bit. The narrow pulse is sent in the middle
of the bit with a duration of 1/32, 1/16, 3/16 or 1/4 of a bit time. A narrow high pulse is transmitted for a
zero bit when TXPOL is cleared, while a narrow low pulse is transmitted for a zero bit when TXPOL is set.
16.4.1.2 Infrared Receive Decoder
The infrared receive block converts data from the RXD pin to the receive shift register. A narrow pulse is
expected for each zero received and no pulse is expected for each one received. A narrow high pulse is
expected for a zero bit when RXPOL is cleared, while a narrow low pulse is expected for a zero bit when
RXPOL is set. This receive decoder meets the edge jitter requirement as defined by the IrDA serial infrared
physical layer specification.
16.4.2 LIN Support
This module provides some basic support for the LIN protocol. At first this is a break detect circuitry
making it easier for the LIN software to distinguish a break character from an incoming data stream. As a
further addition is supports a collision detection at the bit level as well as cancelling pending transmissions.
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
644 Freescale Semiconductor
16.4.3 Data Format
The SCI uses the standard NRZ mark/space data format. When Infrared is enabled, the SCI uses RZI data
format where zeroes are represented by light pulses and ones remain low. See Figure 16-15 below.
Figure 16-15. SCI Data Formats
Each data character is contained in a frame that includes a start bit, eight or nine data bits, and a stop bit.
Clearing the M bit in SCI control register 1 configures the SCI for 8-bit data characters. A frame with eight
data bits has a total of 10 bits. Setting the M bit configures the SCI for nine-bit data characters. A frame
with nine data bits has a total of 11 bits.
When the SCI is configured for 9-bit data characters, the ninth data bit is the T8 bit in SCI data register
high (SCIDRH). It remains unchanged after transmission and can be used repeatedly without rewriting it.
A frame with nine data bits has a total of 11 bits.
Table 16-14. Example of 8-Bit Data Formats
Start
Bit
Data
Bits
Address
Bits
Parity
Bits
Stop
Bit
18001
17011
17 1
(1)
1. The address bit identifies the frame as an address
character. See Section 16.4.6.6, “Receiver Wakeup”.
01
Table 16-15. Example of 9-Bit Data Formats
Start
Bit
Data
Bits
Address
Bits
Parity
Bits
Stop
Bit
19001
18011
18 1
(1) 01
Bit 5
Start
Bit Bit 0 Bit 1
Next
STOP
Bit
Start
Bit
8-Bit Data Format
(Bit M in SCICR1 Clear)
Start
Bit Bit 0
NEXT
STOP
Bit
START
Bit
9-Bit Data Format
(Bit M in SCICR1 Set)
Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8
Bit 2 Bit 3 Bit 4 Bit 6 Bit 7
POSSIBLE
PARITY
Bit
Possible
Parity
Bit Standard
SCI Data
Infrared
SCI Data
Standard
SCI Data
Infrared
SCI Data
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 645
16.4.4 Baud Rate Generation
A 16-bit modulus counter in the two baud rate generator derives the baud rate for both the receiver and the
transmitter . The value from 0 to 65535 written to the SBR15:SBR0 bits determines the baud rate. The value
from 0 to 4095 written to the SBR15:SBR4 bits determines the baud rate clock with SBR3:SBR0 for fine
adjust. The SBR bits are in the SCI baud rate registers (SCIBDH and SCIBDL) for both transmit and
receive baud generator . The baud rate clock is synchronized with the bus clock and drives the receiver. The
baud rate clock divided by 16 drives the transmitter. The receiver has an acquisition rate of 16 samples per
bit time.
Baud rate generation is subject to one source of error:
Integer division of the bus clock may not give the exact target frequency.
Table 16-16 lists some examples of achieving target baud rates with a bus clock frequency of 25 MHz.
When IREN = 0 then,
SCI baud rate = SCI bus clock / (SCIBR[15:0])
1. The address bit identifies the frame as an address
character. See Section 16.4.6.6, “Receiver Wakeup”.
Table 16-16. Baud Rates (Example: Bus Clock = 25 MHz)
Bits
SBR[15:0]
Receiver(1)
Clock (Hz)
1. 16x faster then baud rate
Transmitter(2)
Clock (Hz)
2. divide 1/16 form transmit baud generator
Target
Baud Rate
Error
(%)
109 3669724.8 229,357.8 230,400 .452
217 1843318.0 115,207.4 115,200 .006
651 614439.3 38,402.5 38,400 .006
1302 307219.7 19,201.2 19,200 .006
2604 153,609.8 9600.6 9,600 .006
5208 76,804.9 4800.3 4,800 .006
10417 38,398.8 2399.9 2,400 .003
20833 19,200.3 1200.02 1,200 .00
41667 9599.9 600.0 600 .00
65535 6103.6 381.5
Chapter 16 Serial Communication Interface (S12SCIV6)
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646 Freescale Semiconductor
16.4.5 Transmitter
Figure 16-16. Transmitter Block Diagram
16.4.5.1 Transmitter Character Length
The SCI transmitter can accommodate either 8-bit or 9-bit data characters. The state of the M bit in SCI
control register 1 (SCICR1) determines the length of data characters. When transmitting 9-bit data, bit T8
in SCI data register high (SCIDRH) is the ninth bit (bit 8).
16.4.5.2 Character Transmission
To transmit data, the MCU writes the data bits to the SCI data registers (SCIDRH/SCIDRL), which in turn
are transferred to the transmitter shift register. The transmit shift register then shifts a frame out through
the TXD pin, after it has prefaced them with a start bit and appended them with a stop bit. The SCI data
registers (SCIDRH and SCIDRL) are the write-only buffers between the internal data bus and the transmit
shift register.
PE
PT
H876543210L
11-Bit Transmit Register
Stop
Start
T8
TIE
TDRE
TCIE
SBK
TC
Parity
Generation
MSB
SCI Data Registers
Load from SCIDR
Shift Enable
Preamble (All 1s)
Break (All 0s)
Transmitter Control
M
Internal Bus
SBR15:SBR4
Transmit baud 16
Bus
Clock
TE
SCTXD
TXPOL
LOOPS
LOOP
RSRC
CONTROL To R ec e i v er
Transmit
Collision Detect
TDRE IRQ
TC IRQ
SCTXD
SCRXD
(From Receiver)
TCIE
BERRIF
BER IRQ
BERRM[1:0]
generator
SBR3:SBR0
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 647
The SCI also sets a flag, the transmit data register empty flag (TDRE), every time it transfers data from
the buffer (SCIDRH/L) to the transmitter shift register .The transmit driver routine may respond to this flag
by writing another byte to the Transmitter buffer (SCIDRH/SCIDRL), while the shift register is still
shifting out the first byte.
To initiate an SCI transmission:
1. Configure the SCI:
a) Select a baud rate. Write this value to the SCI baud registers (SCIBDH/L) to begin the baud
rate generator. Remember that the baud rate generator is disabled when the baud rate is zero.
Writing to the SCIBDH has no effect without also writing to SCIBDL.
b) Write to SCICR1 to configure word length, parity, and other configuration bits
(LOOPS,RSRC,M,WAKE,ILT,PE,PT).
c) Enable the transmitter , interrupts, receive, a nd wake up as required, by writing to the SCICR2
register bits (TIE,TCIE,RIE,ILIE,TE,RE,RWU,SBK). A preamble or idle character will now
be shifted out of the transmitter shift register.
2. Transmit Procedure for each byte:
a) Poll the TDRE flag by reading the SCISR1 or responding to the TDRE interrupt. Keep in mind
that the TDRE bit resets to one.
b) If the TDRE flag is set, write the data to be transmitted to SCIDRH/L, where the ninth bit is
written to the T8 bit in SCIDRH if the SCI is in 9-bit data format. A new transmission will not
result until the TDRE flag has been cleared.
3. Repeat step 2 for each subsequent transmission.
NOTE
The TDRE flag is set when the shift register is loaded with the next data to
be transmitted from SCIDRH/L, which happens, generally speaking, a little
over half-way through the stop bit of the previous frame. Specifically, this
transfer occurs 9/16ths of a bit time AFTER the start of the stop bit of the
previous frame.
W riting the TE bit from 0 to a 1 automa tically loads the transmit shift register with a preamble of 10 logic
1s (if M = 0) or 11 logic 1s (if M = 1). After the preamble shifts out, control logic transfer s the data from
the SCI data register into the transmit shift register. A logic 0 start bit automatically goes into the least
significant bit position of the transmit shift register. A logic 1 stop bit goes into the most significant bit
position.
Hardware supports odd or even parity. When parity is enabled, the most significant bit (MSB) of the data
character is the parity bit.
The transmit data register empty flag, TDRE, in SCI status register 1 (SCISR1) becomes set when the SCI
data register tr ansfers a byte to the transmit shift register. The TDRE flag indicates that the SCI data
register can accept new data from the internal data bus. If the transmit interrupt enable bit, TIE, in SCI
control register 2 (SCICR2) is also set, the TDRE flag generates a transmitter interrupt request.
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MC9S12ZVM Family Reference Manual Rev. 2.2
648 Freescale Semiconductor
When the transmit shift register is not transmitting a frame, the TXD pin goes to the idle condition, logic
1. If at any time software clears the TE bit in SCI control register 2 (SCICR2), the transmitter enable signal
goes low and the transmit signal goes idle.
If software clears TE while a transmission is in progress (TC = 0), the frame in the transmit shift register
continues to shift out. To avoid accidentally cutting of f the last frame in a message, always wait for TDRE
to go high after the last frame before clearing TE.
To separate messages with preambles with minimum idle line time, use this sequence between messages:
1. Write the last byte of the first message to SCIDRH/L.
2. Wait for the TDRE flag to go high, indicating the transfer of the last frame to the transmit shift
register.
3. Queue a preamble by clearing and then setting the TE bit.
4. Write the first byte of the second message to SCIDRH/L.
16.4.5.3 Break Characters
Writing a logic 1 to the send break bit, SBK, in SCI control register 2 (SCICR2) loads the transmit shift
register with a break character. A break character contains all logic 0s and has no start, stop, or parity bit.
Break character length depends on the M bit in SCI control register 1 (SCICR1). As long as SBK is at logic
1, transmitter logic continuously loads break characters into the transmit shift register. After software
clears the SBK bit, the shift register finishes transmitting the last break character and then transmits at least
one logic 1. The automatic logic 1 at the end of a break character guarantees the recognition of the start bit
of the next frame.
The SCI recognizes a break character when there are 10 or 1 1(M = 0 or M = 1) consecutive zero received.
Depending if the break detect feature is enabled or not receiving a break character has these ef fects on SCI
registers.
If the break detect feature is disabled (BKDFE = 0):
Sets the framing error flag, FE
Sets the receive data register full flag, RDRF
Clears the SCI data registers (SCIDRH/L)
May set the overrun flag, OR, noise flag, NF, parity error flag, PE, or the receiver active flag, RAF
(see 3.4.4 and 3.4.5 SCI Status Register 1 and 2)
If the break detect feature is enabled (BKDFE = 1) there are two scenarios1
The break is detected right from a start bit or is detected during a byte reception.
Sets the break detect interrupt flag, BKDIF
Does not change the data register full flag, RDRF or overrun flag OR
Does not change the framing error flag FE, parity error flag PE.
Does not clear the SCI data registers (SCIDRH/L)
May set noise flag NF, or receiver active flag RAF.
1. A Break character in this context are either 10 or 11 consecutive zero received bits
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 649
Figure 16-17 shows two cases of break detect. In trace RXD_1 the break symbol starts with the start bit,
while in RXD_2 the break starts in the middle of a transmission. If BRKDFE = 1, in RXD_1 case there
will be no byte transferred to the receive buf fer and the RDRF flag will not be modified. Also no framing
error or parity error will be flagged from this transfer. In RXD_2 case, however the break signal starts later
during the transmission. At the expected stop bit position the byte received so far will be transferred to the
receive buffer, the receive data register full flag will be set, a framing error and if enabled and appropriate
a parity error will be set. Once the break is detected the BRKDIF flag will be set.
Figure 16-17. Break Detection if BRKDFE = 1 (M = 0)
16.4.5.4 Idle Characters
An idle character (or preamble) contains all logic 1s and has no start, stop, or parity bit. Idle character
length depends on the M bit in SCI control register 1 (SCICR1). The preamble is a synchronizing idle
character that begins the first transmission initiated after writing the TE bit from 0 to 1.
If the TE bit is cleared during a transmission, the TXD pin becomes idle after completion of the
transmission in progress. Clearing and then setting the TE bit during a transmission queues an idle
character to be sent after the frame currently being transmitted.
NOTE
When queueing an idle character , return the TE bit to logic 1 before the stop
bit of the current frame shifts out through the TXD pin. Setting TE after the
stop bit appears on TXD causes data previously written to the SCI data
register to be lost. Toggle the TE bit for a queued idle character while the
TDRE flag is set and immediately before writing the next byte to the SCI
data register.
If the TE bit is clear and the transmission is complete, the SCI is not the
master of the TXD pin
Start Bit Position Stop Bit Position
BRKDIF = 1
FE = 1 BRKDIF = 1
RXD_1
RXD_2
123 4567 8 910
123 4567 8 910
Zero Bit Counter
Zero Bit Counter . . .
. . .
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MC9S12ZVM Family Reference Manual Rev. 2.2
650 Freescale Semiconductor
16.4.5.5 LIN Transmit Collision Detection
This module allows to check for collisions on the LIN bus.
Figure 16-18. Collision Detect Principle
If the bit error circuit is enabled (BERRM[1:0] = 0:1 or = 1:0]), the error detect circuit will compare the
transmitted and the received data stream at a point in time and flag any mismatch. The timing checks run
when transmitter is active (not idle). As soon as a mismatch between the transmitted data and the received
data is detected the following happens:
The next bit transmitted will have a high level (TXPOL = 0) or low level (TXPOL = 1)
The transmission is aborted and the byte in transmit buffer is discarded.
the transmit data register empty and the transmission complete flag will be set
The bit error interrupt flag, BERRIF, will be set.
No further transmissions will take place until the BERRIF is cleared.
Figure 16-19. Timing Diagram Bit Error Detection
If the bit error detect feature is disabled, the bit error interrupt flag is cleared.
NOTE
The RXPOL and TXPOL bit should be set the same when transmission
collision detect feature is enabled, otherwise the bit err or interrupt flag may
be set incorrectly.
TXD Pin
RXD Pin
LIN Physical Interface
Synchronizer Stage
Bus Clock
Receive Shift
Register
Transmit Shift
Register
LIN Bus
Compare
Sample
Bit Error
Point
Output Transmit
Shift Register
01234567891011121314150
Input Receive
Shift Register
BERRM[1:0] = 0:1 BERRM[1:0] = 1:1
Compare Sample Points
Sampling Begin
Sampling Begin
Sampling End
Sampling End
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 651
16.4.6 Receiver
Figure 16-20. SCI Receiver Block Diagram
16.4.6.1 Receiver Character Length
The SCI receiver can accommodate either 8-bit or 9-bit data characters. The state of the M bit in SCI
control register 1 (SCICR1) determines the length of data characters. When receiving 9-bit data, bit R8 in
SCI data register high (SCIDRH) is the ninth bit (bit 8).
16.4.6.2 Character Reception
During an SCI reception, the receive shift register shifts a frame in from the RXD pin. The SCI data
register is the read-only buffer between the internal data bus and the receive shift register.
After a complete frame shifts into the receive shift register, the data portion of the frame transfers to the
SCI data register. The receive data register full flag, RDRF, in SCI status register 1 (SCISR1) becomes set,
All 1s
M
WAKE
ILT
PE
PT
RE
H876543210L
11-Bit Receive Shift Register
Stop
Start
Data
Wakeup
Parity
Checking
MSB
SCI Data Register
R8
ILIE
RWU
RDRF
OR
NF
FE
PE
Internal Bus
Bus
SBR15:SBR4
Receive Baud
Clock
IDLE
RAF
Recovery
Logic
RXPOL
LOOPS
Loop
RSRC
Control
SCRXD
From TXD Pin
or Transmitter
Idle IRQ
RDRF/OR
IRQ
Break
Detect Logic
Active Edge
Detect Logic
BRKDFE
BRKDIE
BRKDIF
RXEDGIE
RXEDGIF
Break IRQ
RX Active Edge IRQ
RIE
Generator
SBR3:SBR0
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
652 Freescale Semiconductor
indicating that the received byte can be read. If the receive interrupt enable bit, RIE, in SCI control
register 2 (SCICR2) is also set, the RDRF flag generates an RDRF interrupt request.
16.4.6.3 Data Sampling
The RT clock rate. The RT clock is an internal signal with a frequency 16 times the baud rate. To adjust
for baud rate mismatch, the RT clock (see Figure 16-21) is re-synchronized immediatelly at bus clock
edge:
After every start bit
After the receiver detects a data bit change from logic 1 to logic 0 (after the majority of data bit
samples at RT8, RT9, and RT10 returns a valid logic 1 and the majority of the next RT8, RT9, and
RT10 samples returns a valid logic 0)
T o locate the start bit, data recovery logic does an asynchronous search for a logic 0 preceded by three logic
1s.When the falling edge of a possible start bit occurs, the RT clock begins to count to 16.
Figure 16-21. Receiver Data Sampling
To verify the start bit and to detect noise, data recovery logic takes samples at RT3, RT5, and RT7.
Figure 16-17 summarizes the results of the start bit verification samples.
If start bit verification is not successful, the RT clock is reset and a new search for a start bit begins.
Table 16-17. Start Bit Verification
RT3, RT5, and RT7 Samples Start Bit Verification Noise Flag
000 Yes 0
001 Yes 1
010 Yes 1
011 No 0
100 Yes 1
101 No 0
110 No 0
111 No 0
Reset RT Clock
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT2
RT3
RT4
RT5
RT8
RT7
RT6
RT11
RT10
RT9
RT15
RT14
RT13
RT12
RT16
RT1
RT2
RT3
RT4
Samples
RT Clock
RT CLock Count
Start Bit
RXD
Start Bit
Qualification
Start Bit Data
Sampling
111111110000000
LSB
Verification
Chapter 16 Serial Communication Interface (S12SCIV6)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 653
To determine the value of a data bit and to detect noise, recovery logic takes samples at RT8, RT9, and
RT10. Table 16-18 summarizes the results of the data bit samples.
NOTE
The RT8, RT9, and RT10 samples do not affect start bit verification. If any
or all of the RT8, RT9, and RT10 start bit samples are logic 1s following a
successful start bit verification, the noise flag (NF) is set and the receiver
assumes that the bit is a start bit (logic 0).
To verify a stop bit and to detect noise, recovery logic takes samples at RT8, R T9, and RT10. Table 16-19
summarizes the results of the stop bit samples.
Table 16-18. Data Bit Recovery
RT8, RT9, and RT10 Samples Data Bit Determination Noise Flag
000 0 0
001 0 1
010 0 1
011 1 1
100 0 1
101 1 1
110 1 1
111 1 0
Table 16-19. Stop Bit Recovery
RT8, RT9, and RT10 Samples Framing Error Flag Noise Flag
000 1 0
001 1 1
010 1 1
011 0 1
100 1 1
101 0 1
110 0 1
111 0 0
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654 Freescale Semiconductor
In Figure 16-22 the verification samples RT3 and RT5 determine that the first low detected was noise and
not the beginning of a start bit. The RT clock is reset and the start bit search begins again. The noise flag
is not set because the noise occurred before the start bit was found.
Figure 16-22. Start Bit Search Example 1
In Figure 16-23, verification sample at RT3 is high. The RT3 sample sets the noise flag. Although the
perceived bit time is misaligned, the data samples RT8, RT9, and RT10 are within the bit time and data
recovery is successful.
Figure 16-23. Start Bit Search Example 2
Reset RT Clock
RT1
RT1
RT1
RT1
RT2
RT3
RT4
RT5
RT1
RT1
RT2
RT3
RT4
RT7
RT6
RT5
RT10
RT9
RT8
RT14
RT13
RT12
RT11
RT15
RT16
RT1
RT2
RT3
Samples
RT Clock
RT Clock Count
Start Bit
RXD
110111100000
LSB
0 0
Reset RT Clock
RT1
RT1
RT1
RT1
RT1
RT1
RT2
RT3
RT4
RT5
RT6
RT7
RT8
RT11
RT10
RT9
RT14
RT13
RT12
RT2
RT1
RT16
RT15
RT3
RT4
RT5
RT6
RT7
Samples
RT Clock
RT Clock Count
Actual Start Bit
RXD
1111110000
LSB
00
Perceived Start Bit
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In Figure 16-24, a large burst of noise is perc eived as the beginning of a start bit, although the test sample
at RT5 is high. The RT5 sample sets the noise flag. Although this is a worst-case misalignment of
perceived bit time, the data samples RT8, RT9, and RT10 are within the bit time and data recovery is
successful.
Figure 16-24. Start Bit Search Example 3
Figure 16-25 shows the effect of noise early in the start bit time. Although this noise does not af fect proper
synchronization with the start bit time, it does set the noise flag.
Figure 16-25. Start Bit Search Example 4
Reset RT Clock
RT1
RT1
RT1
RT1
RT2
RT3
RT4
RT5
RT6
RT7
RT8
RT9
RT10
RT13
RT12
RT11
RT16
RT15
RT14
RT4
RT3
RT2
RT1
RT5
RT6
RT7
RT8
RT9
Samples
RT Clock
RT Clock Count
Actual Start Bit
RXD
101110000
LSB
0
Perceived Start Bit
Reset RT Clock
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT2
RT3
RT4
RT7
RT6
RT5
RT10
RT9
RT8
RT14
RT13
RT12
RT11
RT15
RT16
RT1
RT2
RT3
Samples
RT Clock
RT Clock Count
Perceived and Actual Start Bit
RXD
11111001
LSB
11 1 1
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Figure 16-26 shows a burst of noise near the beginning of the start bit that resets the RT clock. The sample
after the reset is low but is not preceded by three high samples that would qualify as a falling edge.
Depending on the timing of the start bit search and on the data, the f rame may be missed entirely or it may
set the framing error flag.
Figure 16-26. Start Bit Search Example 5
In Figure 16-27, a noise burst makes the majority of data samples R T8, RT9, and RT10 high. This sets the
noise flag but does not reset the RT clock. In start bits only, the RT8, RT9, and RT10 data samples are
ignored.
Figure 16-27. Start Bit Search Example 6
16.4.6.4 Framing Errors
If the data recovery logic does not detect a logic 1 where the stop bit should be in an incoming frame, it
sets the framing error flag, FE, in SCI status register 1 (SCISR1). A break character also sets the FE flag
because a break character has no stop bit. The FE flag is set at the same time that the RDRF flag is set.
Reset RT Clock
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT2
RT3
RT4
RT7
RT6
RT5
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
Samples
RT Clock
RT Clock Count
Start Bit
RXD
11111010
LSB
11 1 1 1 0000000 0
No Start Bit Found
Reset RT Clock
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT1
RT2
RT3
RT4
RT7
RT6
RT5
RT10
RT9
RT8
RT14
RT13
RT12
RT11
RT15
RT16
RT1
RT2
RT3
Samples
RT Clock
RT Clock Count
Start Bit
RXD
11111000
LSB
11 1 1 0 110
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16.4.6.5 Baud Rate Tolerance
A transmitting device may be operating at a baud rate below or above the receiver baud rate. Accumulated
bit time misalignment can cause one of the three stop bit data samples (R T8, R T9, and RT10) to fall outside
the actual stop bit. A noise error will occur if the RT8, R T9, and RT10 samples are not all the same logical
values. A framing error will occur if the receiver clock is misaligned in such a way tha t the majority of the
RT8, RT9, and RT10 stop bit samples are a logic zero.
As the receiver samples an incoming frame, it re-synchronizes the RT clock on any valid falling edge
within the frame. Re synchronization within frames will correct a misalignment between transmitter bit
times and receiver bit times.
16.4.6.5.1 Slow Data Tolerance
Figure 16-28 shows how much a slow received frame can be misaligned without causing a noise error or
a framing error. The slow stop bit begins at RT8 instead of RT1 but arrives in time for the stop bit data
samples at RT8, RT9, and RT10.
Figure 16-28. Slow Data
Let’s take RTr as receiver RT clock and RTt as transmitter RT clock.
For an 8-bit data character , it takes the receiver 9 bit times x 16 R T r cycles +7 RT r cycles = 151 R T r cycles
to start data sampling of the stop bit.
W ith the misaligned character shown in Figure 16-28, the receiver counts 151 R T r cycles at the point when
the count of the transmitting device is 9 bit times x 16 RTt cycles = 144 RTt cycles.
The maximum percent difference between the receiver count and the transmitter count of a slow 8-bit data
character with no errors is:
((151 – 144) / 151) x 100 = 4.63%
For a 9-bit data character , it takes the receiver 10 bit times x 16 R T r cycles + 7 R T r cycles = 167 R Tr cycles
to start data sampling of the stop bit.
W ith the misaligned character shown in Figure 16-28, the receiver counts 167 R T r cycles at the point when
the count of the transmitting device is 10 bit times x 16 RTt cycles = 160 RTt cycles.
The maximum percent difference between the receiver count and the transmitter count of a slow 9-bit
character with no errors is:
((167 – 160) / 167) X 100 = 4.19%
MSB Stop
RT1
RT2
RT3
RT4
RT5
RT6
RT7
RT8
RT9
RT10
RT11
RT12
RT13
RT14
RT15
RT16
Data
Samples
Receiver
RT Clock
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16.4.6.5.2 Fast Data Tolerance
Figure 16-29 shows how much a fast received frame can be misaligned. The fast stop bit ends at RT10
instead of RT16 but is still sampled at RT8, RT9, and RT10.
Figure 16-29. Fast Data
For an 8-bit data character , it takes the receiver 9 bit times x 16 R T r cycles + 9 R T r cycles = 153 R T r cycles
to finish data sampling of the stop bit.
W ith the misaligned character shown in Figure 16-29, the receiver counts 153 R T r cycles at the point when
the count of the transmitting device is 10 bit times x 16 RTt cycles = 160 RTt cycles.
The maximum percent difference between the receiver count and the transmitter count of a fast 8-bit
character with no errors is:
((160 – 153) / 160) x 100 = 4.375%
For a 9-bit data character , it takes the receiver 10 bit times x 16 R T r cycles + 9 R Tr cycles = 169 R Tr cycles
to finish data sampling of the stop bit.
W ith the misaligned character shown in Figure 16-29, the receiver counts 169 R T r cycles at the point when
the count of the transmitting device is 11 bit times x 16 RTt cycles = 176 RTt cycles.
The maximum percent difference between the receiver count and the transmitter count of a fast 9-bit
character with no errors is:
((176 – 169) /176) x 100 = 3.98%
NOTE
Due to asynchronous sample and internal logic, there is maximal 2 bus
cycles between startbit edge and 1st RT clock, and cause to additional
tolerance loss at worst case. The loss should be 2/SBR/10*100%, it is
small.For example, for highspeed baud=230400 with 25MHz bus, SBR
should be 109, and the tolerance loss is 2/109/10*100=0.18%, and fast data
tolerance is 4.375%-0.18%=4.195%.
16.4.6.6 Receiver Wakeup
To enable the SCI to ignore transmissions intended only for other receivers in multiple-receiver systems,
the receiver can be put into a standby state. Setting the receiver wakeup bit, R WU, in SCI control register 2
(SCICR2) puts the receiver into standby state during which receiver interrupts are disabled.The SCI will
still load the receive data into the SCIDRH/L registers, but it will not set the RDRF flag.
Idle or Next FrameStop
RT1
RT2
RT3
RT4
RT5
RT6
RT7
RT8
RT9
RT10
RT11
RT12
RT13
RT14
RT15
RT16
Data
Samples
Receiver
RT Clock
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The transmitting device can address messages to selected receivers by including addressing information
in the initial frame or frames of each message.
The WAKE bit in SCI control register 1 (SCICR1) determines how the SCI is brought out of the standby
state to process an incoming message. The WAKE bit enables either idle line wakeup or address mark
wakeup.
16.4.6.6.1 Idle Input line Wakeup (WAKE = 0)
In this wakeup method, an idle condition on the RXD pin clears the RWU bit and wakes up the SCI. The
initial frame or frames of every message contain addressing information. All receivers evaluate the
addressing information, and receivers for which the message is addressed process the frames that follow.
Any receiver for which a message is not addressed can set its R WU bit and return to the standby state. The
RWU bit remains set and the receiver remains on standby until another idle character appears on the RXD
pin.
Idle line wakeup requires that messages be separated by at least one idle character and that no message
contains idle characters.
The idle character that wakes a receiver does not set the receiver idle bit, IDLE, or the receive data register
full flag, RDRF.
The idle line type bit, ILT, determines whether the receiver begins counting logic 1s as idle character bits
after the start bit or after the stop bit. ILT is in SCI control register 1 (SCICR1).
16.4.6.6.2 Address Mark Wakeup (WAKE = 1)
In this wakeup method, a logic 1 in the most significant bit (MSB) position of a frame clears the RWU bit
and wakes up the SCI. The logic 1 in the MSB position marks a frame as an address frame that contains
addressing information. All receivers evaluate the addressing information, and the receivers for which the
message is addressed process the frames that follow.Any receiver for which a message is not addressed
can set its RWU bit and return to the standby state. The RWU bit remains set and the receiver remains on
standby until another address frame appears on the RXD pin.
The logic 1 MSB of an address frame clears the receiver s RWU bit before the stop bit is received and sets
the RDRF flag.
Address mark wakeup allows messages to contain idle characters but requires that the MSB be reserved
for use in address frames.
NOTE
With the WAKE bit clear, setting the RWU bit after the RXD pin has been
idle can cause the receiver to wake up immediately.
16.4.7 Single-Wire Operation
Normally, the SCI uses two pins for transmitting and receiving. In single-wire operation, the RXD pin is
disconnected from the SCI. The SCI uses the TXD pin for both receiving and transmitting.
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Figure 16-30. Single-Wire Operation (LOOPS = 1, RSRC = 1)
Enable single-wire operation by setting the LOOPS bit and the receiver source bit, RSRC, in SCI control
register 1 (SCICR1). Setting the LOOPS bit disables the path from the RXD pin to the receiver. Setting
the RSRC bit connects the TXD pin to the receiver. Both the transmitter and receiver must be enabled
(TE = 1 and RE = 1).The TXDIR bit (SCISR2[1]) determines whether the TXD pin is going to be used as
an input (TXDIR = 0) or an output (TXDIR = 1) in this mode of operation.
NOTE
In single-wire operation data from the TXD pin is inverted if RXPOL is set.
16.4.8 Loop Operation
In loop operation the transmitter output goes to the receiver input. The RXD pin is disconnected from the
SCI.
Figure 16-31. Loop Operation (LOOPS = 1, RSRC = 0)
Enable loop operation by setting the LOOPS bit and clearing the RSRC bit in SCI control register 1
(SCICR1). Setting the LOOPS bit disables the path from the RXD pin to the receiver. Clearing the RSRC
bit connects the transmitter output to the receiver input. Both the transmitter and receiver must be enabled
(TE = 1 and RE = 1).
NOTE
In loop operation data from the transmitter is not recognized by the receiver
if RXPOL and TXPOL are not the same.
16.5 Initialization/Application Information
16.5.1 Reset Initialization
See Section 16.3.2, “Register Descriptions”.
RXD
Transmitter
Receiver
TXD
RXD
Transmitter
Receiver
TXD
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16.5.2 Modes of Operation
16.5.2.1 Run Mode
Normal mode of operation.
To initialize a SCI transmission, see Section 16.4.5.2, “Character Transmission”.
16.5.2.2 Wait Mode
SCI operation in wait mode depends on the state of the SCISWAI bit in the SCI control register 1
(SCICR1).
If SCISWAI is clear, the SCI operates normally when the CPU is in wait mode.
If SCISWAI is set, SCI clock generation ceases and the SCI module enters a power-conservation
state when the CPU is in wait mode. Setting SCISWAI does not affect the state of the receiver
enable bit, RE, or the transmitter enable bit, TE.
If SCISWAI is set, any transmission or reception in progress stops at wait mode entry. The
transmission or rece ption resumes when either an internal or external interrupt brings the CPU out
of wait mode. Exiting wait mode by reset aborts any transmission or reception in progress and
resets the SCI.
16.5.2.3 Stop Mode
The SCI is inactive during stop mode for reduced power consumption. The STOP instruction does not
affect the SCI register states, but the SCI bus clock will be disabled. The SCI operation resumes from
where it left off after an external interrupt brings the CPU out of stop mode. Exiting stop mode by reset
aborts any transmission or reception in progress and resets the SCI.
The receive input active edge detect circuit is still active in stop mode. An active edge on the receive input
can be used to bring the CPU out of stop mode.
16.5.3 Interrupt Operation
This section describes the interrupt originated by the SCI block.The MCU must service the interrupt
requests. Table 16-20 lists the eight interrupt sources of the SCI.
Table 16-20. SCI Interrupt Sources
Interrupt Source Local Enable Description
TDRE SCISR1[7] TIE Active high level. Indicates that a byte was transferred from SCIDRH/L to the
transmit shift register.
TC SCISR1[6] TCIE Active high level. Indicates that a transmit is complete.
RDRF SCISR1[5] RIE Active high level. The RDRF interrupt indicates that received data is available
in the SCI data register.
OR SCISR1[3] Active high level. This interrupt indicates that an overrun condition has occurred.
IDLE SCISR1[4] ILIE Active high level. Indicates that receiver input has become idle.
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RXEDGIF SCIASR1[7] RXEDGIE Active high level. Indicates that an active edge (falling for RXPOL = 0, rising for
RXPOL = 1) was detected.
BERRIF SCIASR1[1] BERRIE Active high level. Indicates that a mismatch between transmitted and received data
in a single wire application has happened.
BKDIF SCIASR1[0] BRKDIE Active high level. Indicates that a break character has been received.
Table 16-20. SCI Interrupt Sources
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16.5.3.1 Description of Interrupt Operation
The SCI only originates interrupt requests. The following is a description of how the SCI makes a request
and how the MCU should acknowledge that request. The interrupt vector offset and interrupt number are
chip dependent. The SCI only has a single interrupt line (SCI Interrupt Signal, active high operation) and
all the following interrupts, when generated, are ORed together and issued through that port.
16.5.3.1.1 TDRE Description
The TDRE interrupt is set high by the SCI when the transmit shift register receives a byte from the SCI
data register. A TDRE interrupt indicates that the transmit data register (SCIDRH/L) is empty and that a
new byte can be written to the SCIDRH/L for transmission.Clear TDRE by reading SCI status register 1
with TDRE set and then writing to SCI data register low (SCIDRL).
16.5.3.1.2 TC Description
The TC interrupt is set by the SCI when a transmission has been completed. Transmission is completed
when all bits including the stop bit (if transmitted) have been shifted out and no data is queued to be
transmitted. No stop bit is transmitted when sending a break character and the TC flag is set (providing
there is no more data queued for transmission) when the break character has been shifted out. A TC
interrupt indicates that there is no transmission in progress. TC is set high when the TDRE flag is set and
no data, preamble, or break character is being transmitted. When TC is set, the TXD pin becomes idle
(logic 1). Clear TC by reading SCI status register 1 (SCISR1) with TC set and then writing to SCI data
register low (SCIDRL).TC is cle ared automatically when data, preamble, or break is queued and ready to
be sent.
16.5.3.1.3 RDRF Description
The RDRF interrupt is set when the data in the receive shift register transfers to the SCI data register. A
RDRF interrupt indicates that the received data has been transferred to the SCI data register and that the
byte can now be read by the MCU. The RDRF interrupt is cleared by reading the SCI status register one
(SCISR1) and then reading SCI data register low (SCIDRL).
16.5.3.1.4 OR Description
The OR interrupt is set when software fails to read the SCI data register before the receive shift register
receives the next frame. The newly acquired data in the shift register will be lost in this case, but the data
already in the SCI data registers is not affected. The OR interrupt is cleared by reading the SCI status
register one (SCISR1) and then reading SCI data register low (SCIDRL).
16.5.3.1.5 IDLE Description
The IDLE interrupt is set when 10 consecutive logic 1s (if M = 0) or 11 consecutive logic 1s (if M = 1)
appear on the receiver input. Once the IDLE is cleared, a valid frame must again set the RDRF flag before
an idle condition can set the IDLE flag. Clear IDLE by reading SCI status register 1 (SCISR1) with IDLE
set and then reading SCI data register low (SCIDRL).
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16.5.3.1.6 RXEDGIF Description
The RXEDGIF interrupt is set when an active edge (falling if RXPOL = 0, rising if RXPOL = 1) on the
RXD pin is detected. Clear RXEDGIF by writing a “1” to the SCIASR1 SCI alternative status register 1.
16.5.3.1.7 BERRIF Description
The BERRIF interrupt is set when a mismatch between the transmitted and the received data in a single
wire application like LIN was detected. Clear BERRIF by writing a “1” to the SCIASR1 SCI alternative
status register 1. This flag is also cleared if the bit error detect feature is disabled.
16.5.3.1.8 BKDIF Description
The BKDIF interrupt is set when a break signal was received. Clear BKDIF by writing a “1” to the
SCIASR1 SCI alternative status register 1. This flag is also cleared if break detect feature is disabled.
16.5.4 Recovery from Wait Mode
The SCI interrupt request can be used to bring the CPU out of wait mode.
16.5.5 Recovery from Stop Mode
An active edge on the receive input can be used to bring the CPU out of stop mode.
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Chapter 17
Serial Peripheral Interface (S12SPIV5)
17.1 Introduction
The SPI module allows a duplex, synchronous, serial communication between the MCU and peripheral
devices. Software can poll the SPI status flags or the SPI operation can be interrupt driven.
17.1.1 Glossary of Terms
17.1.2 Features
The SPI includes these distinctive features:
Master mode and slave mode
Selectable 8 or 16-bit transfer width
Bidirectional mode
Slave select output
Mode fault error flag with CPU interrupt capability
Double-buffered data register
Serial clock with programmable polarity and phase
Control of SPI operation during wait mode
17.1.3 Modes of Operation
The SPI functions in three modes: run, wait, and stop.
Table 17-1. Revision History
Revision
Number Revision Date Sections
Affected Description of Changes
V05.00 24 Mar 2005 17.3.2/17-669 - Added 16-bit transfer width feature.
SPI Serial Peripheral Interface
SS Slave Select
SCK Serial Clock
MOSI Master Output, Slave Input
MISO Master Input, Slave Output
MOMI Master Output, Master Input
SISO Slave Input, Slave Output
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Run mode
This is the basic mode of operation.
Wait mode
SPI operation in wait mode is a configurable low power mode, controlled by the SPISWAI bit
located in the SPICR2 register. In wait mode, if the SPISWAI bit is clear, the SPI operates like in
run mode. If the SPISWAI bit is set, the SPI goes into a power conservative state, with the SPI clock
generation turned off. If the SPI is configured as a master, any transmission in progress stops, but
is resumed after CPU goes into run mode. If the SPI is configured as a slave, reception and
transmission of data continues, so that the slave stays synchronized to the master.
Stop mode
The SPI is inactive in stop mode for reduced power consumption. If the SPI is configured as a
master , any transmission in progress stops, but is resumed after CPU goes into run mode. If the SPI
is configured as a slave, reception and transmission of data continues, so that the slave stays
synchronized to the master.
For a detailed description of operating modes, please refer to Section 17.4.7, “Low Power Mode Options”.
17.1.4 Block Diagram
Figure 17-1 gives an overview on the SPI architecture. The main parts of the SPI are status, control and
data registers, shifter logic, baud rate generator, master/slave control logic, and port control logic.
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Figure 17-1. SPI Block Diagram
17.2 External Signal Description
This section lists the name and description of all ports including inputs and outputs that do, or may , connect
off chip. The SPI module has a total of four external pins.
17.2.1 MOSI — Master Out/Slave In Pin
This pin is used to transmit data out of the SPI module when it is configured as a master and receive data
when it is configured as slave.
17.2.2 MISO — Master In/Slave Out Pin
This pin is used to transmit data out of the SPI module when it is configured as a slave and receive data
when it is configured as master.
SPI Control Register 1
SPI Control Register 2
SPI Baud Rate Register
SPI Status Register
SPI Data Register
Shifter
Port
Control
Logic
MOSI
SCK
Interrupt Control
SPI
MSB LSB
LSBFE=1 LSBFE=0
LSBFE=0 LSBFE=1
Data In
LSBFE=1
LSBFE=0
Data Out
Baud Rate Generator
Prescaler
Bus Clock
Counter
Clock Select
SPPR 33
SPR
Baud Rate
Phase +
Polarity
Control
Master
Slave
SCK In
SCK Out
Master Baud Rate
Slave Baud Rate
Phase +
Polarity
Control
Control
Control CPOL CPHA
2
BIDIROE
SPC0
2
Shift Sample
ClockClock
MODF
SPIF SPTEF
SPI
Request
Interrupt
SS
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17.2.3 SS — Slave Select Pin
This pin is used to output the select signal from the SPI module to another peripheral with which a data
transfer is to take place when it is configured as a master and it is used as an input to receive the slave select
signal when the SPI is configured as slave.
17.2.4 SCK — Serial Clock Pin
In master mode, this is the synchronous output clock. In slave mode, this is the synchronous input clock.
17.3 Memory Map and Register Definition
This section provides a detailed description of address space and registers used by the SPI.
17.3.1 Module Memory Map
The memory map for the SPI is given in Figure 17-2. The address listed for each register is the sum of a
base address and an address offset. The base address is defined at the SoC level and the address offset is
defined at the module level. Reads from the reserved bits return zeros and writes to the reserved bits have
no effect.
Register
Name Bit 765 4 3 2 1Bit 0
0x0000
SPICR1
RSPIE SPE SPTIE MSTR CPOL CPHA SSOE LSBFE
W
0x0001
SPICR2
R0 XFRW 0MODFEN BIDIROE 0SPISWAI SPC0
W
0x0002
SPIBR
R0 SPPR2 SPPR1 SPPR0 0SPR2 SPR1 SPR0
W
0x0003
SPISR
R SPIF 0 SPTEF MODF 0 0 0 0
W
0x0004
SPIDRH
R R15 R14 R13 R12 R11 R10 R9 R8
T15 T14 T13 T12 T11 T10 T9 T8W
0x0005
SPIDRL
RR7R6R5R4R3R2R1R0
T7 T6 T5 T4 T3 T2 T1 T0W
0x0006
Reserved
R
W
0x0007
Reserved
R
W
= Unimplemented or Reserved
Figure 17-2. SPI Register Summary
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17.3.2 Register Descriptions
This section consists of register descriptions in address order. Each description includes a standard register
diagram with an associated figure number. Details of register bit and field function follow the register
diagrams, in bit order.
17.3.2.1 SPI Control Register 1 (SPICR1)
Read: Anytime
Write: Anytime
Module Base +0x0000
76543210
RSPIE SPE SPTIE MSTR CPOL CPHA SSOE LSBFE
W
Reset00000100
Figure 17-3. SPI Control Register 1 (SPICR1)
Table 17-2. SPICR1 Field Descriptions
Field Description
7
SPIE
SPI Interrupt Enable Bit — This bit enables SPI interrupt requests, if SPIF or MODF status flag is set.
0 SPI interrupts disabled.
1 SPI interrupts enabled.
6
SPE
SPI System Enable Bit — This bit enables the SPI system and dedicates the SPI port pins to SPI system
functions. If SPE is cleared, SPI is disabled and forced into idle state, status bits in SPISR register are reset.
0 SPI disabled (lower power consumption).
1 SPI enabled, port pins are dedicated to SPI functions.
5
SPTIE
SPI Transmit Interrupt Enable — This bit enables SPI interrupt requests, if SPTEF flag is set.
0 SPTEF interrupt disabled.
1 SPTEF interrupt enabled.
4
MSTR
SPI Master/Slave Mode Select Bit — This bit selects whether the SPI operates in master or slave mode.
Switching the SPI from master to slave or vice versa forces the SPI system into idle state.
0 SPI is in slave mode.
1 SPI is in master mode.
3
CPOL
SPI Clock Polarity Bit — This bit selects an inverted or non-inverted SPI clock. To transmit data between SPI
modules, the SPI modules must have identical CPOL values. In master mode, a change of this bit will abort a
transmission in progress and force the SPI system into idle state.
0 Active-high clocks selected. In idle state SCK is low.
1 Active-low clocks selected. In idle state SCK is high.
2
CPHA
SPI Clock Phase Bit — This bit is used to select the SPI clock format. In master mode, a change of this bit will
abort a transmission in progress and force the SPI system into idle state.
0 Sampling of data occurs at odd edges (1,3,5,...) of the SCK clock.
1 Sampling of data occurs at even edges (2,4,6,...) of the SCK clock.
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17.3.2.2 SPI Control Register 2 (SPICR2)
Read: Anytime
Write: Anytime; writes to the reserved bits have no effect
1
SSOE
Slave Select Output Enable — The SS output feature is enabled only in master mode, if MODFEN is set, by
asserting the SSOE as shown in Tabl e 17 -3 . In master mode, a change of this bit will abort a transmission in
progress and force the SPI system into idle state.
0
LSBFE
LSB-First Enable — This bit does not affect the position of the MSB and LSB in the data register. Reads and
writes of the data register always have the MSB in the highest bit position. In master mode, a change of this bit
will abort a transmission in progress and force the SPI system into idle state.
0 Data is transferred most significant bit first.
1 Data is transferred least significant bit first.
Table 17-3. S S Input / Output Selection
MODFEN SSOE Master Mode Slave Mode
00 SS
not used by SPI SS input
01 SS not used by SPI SS input
10SS
input with MODF feature SS input
11 SS
is slave select output SS input
Module Base +0x0001
76543210
R0 XFRW 0MODFEN BIDIROE 0SPISWAI SPC0
W
Reset00000000
= Unimplemented or Reserved
Figure 17-4. SPI Control Register 2 (SPICR2)
Table 17-2. SPICR1 Field Descriptions (continued)
Field Description
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 671
Table 17-4. SPICR2 Field Descriptions
Field Description
6
XFRW
Transfer Width This bit is used for selecting the data transfer width. If 8-bit transfer width is selected, SPIDRL
becomes the dedicated data register and SPIDRH is unused. If 16-bit transfer width is selected, SPIDRH and
SPIDRL form a 16-bit data register. Please refer to Section 17.3.2.4, “SPI Status Register (SPISR) for
information about transmit/receive data handling and the interrupt flag clearing mechanism. In master mode, a
change of this bit will abort a transmission in progress and force the SPI system into idle state.
0 8-bit Transfer Width (n = 8)(1)
1 16-bit Transfer Width (n = 16)1
1. n is used later in this document as a placeholder for the selected transfer width.
4
MODFEN
Mode Fault Enable Bit — This bit allows the MODF failure to be detected. If the SPI is in master mode and
MODFEN is cleared, then the SS port pin is not used by the SPI. In slave mode, the SS is available only as an
input regardless of the value of MODFEN. For an overview on the impact of the MODFEN bit on the SS port pin
configuration, refer to Tabl e 17 -3. In master mode, a change of this bit will abort a transmission in progress and
force the SPI system into idle state.
0SS
port pin is not used by the SPI.
1SS port pin with MODF feature.
3
BIDIROE
Output Enable in the Bidirectional Mode of Operation This bit controls the MOSI and MISO output buffer
of the SPI, when in bidirectional mode of operation (SPC0 is set). In master mode, this bit controls the output
buffer of the MOSI port, in slave mode it controls the output buffer of the MISO port. In master mode, with SPC0
set, a change of this bit will abort a transmission in progress and force the SPI into idle state.
0 Output buffer disabled.
1 Output buffer enabled.
1
SPISWAI
SPI Stop in Wait Mode Bit — This bit is used for power conservation while in wait mode.
0 SPI clock operates normally in wait mode.
1 Stop SPI clock generation when in wait mode.
0
SPC0
Serial Pin Control Bit 0 — This bit enables bidirectional pin configurations as shown in Table 17-5. In master
mode, a change of this bit will abort a transmission in progress and force the SPI system into idle state.
Table 17-5. Bidirectional Pin Configurations
Pin Mode SPC0 BIDIROE MISO MOSI
Master Mode of Operation
Normal 0 X Master In Master Out
Bidirectional 1 0 MISO not used by SPI Master In
1Master I/O
Slave Mode of Operation
Normal 0 X Slave Out Slave In
Bidirectional 1 0 Slave In MOSI not used by SPI
1 Slave I/O
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
672 Freescale Semiconductor
17.3.2.3 SPI Baud Rate Register (SPIBR)
Read: Anytime
Write: Anytime; writes to the reserved bits have no effect
The baud rate divisor equation is as follows:
BaudRateDivisor = (SPPR + 1) 2(SPR + 1) Eqn. 17-1
The baud rate can be calculated with the following equation:
Baud Rate = BusClock / BaudRateDivisor Eqn. 17-2
NOTE
For maximum allowed baud rates, please refer to the SPI Electrical
Specification in the Electricals chapter of this data sheet.
Module Base +0x0002
76543210
R0 SPPR2 SPPR1 SPPR0 0SPR2 SPR1 SPR0
W
Reset00000000
= Unimplemented or Reserved
Figure 17-5. SPI Baud Rate Register (SPIBR)
Table 17-6. SPIBR Field Descriptions
Field Description
6–4
SPPR[2:0]
SPI Baud Rate Preselection Bits These bits specify the SPI baud rates as shown in Table 17-7. In master
mode, a change of these bits will abort a transmission in progress and force the SPI system into idle state.
2–0
SPR[2:0]
SPI Baud Rate Selection BitsThese bits specify the SPI baud rates as shown in Table 17-7. In master mode,
a change of these bits will abort a transmission in progress and force the SPI system into idle state.
Table 17-7. Example SPI Baud Rate Selection (25 MHz Bus Clock) (Sheet 1 of 3)
SPPR2 SPPR1 SPPR0 SPR2 SPR1 SPR0 Baud Rate
Divisor Baud Rate
000000 2 12.5 Mbit/s
000001 4 6.25 Mbit/s
0 0 0 0 1 0 8 3.125 Mbit/s
0 0 0 0 1 1 16 1.5625 Mbit/s
0 0 0 1 0 0 32 781.25 kbit/s
0 0 0 1 0 1 64 390.63 kbit/s
0 0 0 1 1 0 128 195.31 kbit/s
0 0 0 1 1 1 256 97.66 kbit/s
001000 4 6.25 Mbit/s
0 0 1 0 0 1 8 3.125 Mbit/s
0 0 1 0 1 0 16 1.5625 Mbit/s
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 673
0 0 1 0 1 1 32 781.25 kbit/s
0 0 1 1 0 0 64 390.63 kbit/s
0 0 1 1 0 1 128 195.31 kbit/s
0 0 1 1 1 0 256 97.66 kbit/s
0 0 1 1 1 1 512 48.83 kbit/s
0 1 0 0 0 0 6 4.16667 Mbit/s
0 1 0 0 0 1 12 2.08333 Mbit/s
0 1 0 0 1 0 24 1.04167 Mbit/s
0 1 0 0 1 1 48 520.83 kbit/s
0 1 0 1 0 0 96 260.42 kbit/s
0 1 0 1 0 1 192 130.21 kbit/s
0 1 0 1 1 0 384 65.10 kbit/s
0 1 0 1 1 1 768 32.55 kbit/s
0 1 1 0 0 0 8 3.125 Mbit/s
0 1 1 0 0 1 16 1.5625 Mbit/s
0 1 1 0 1 0 32 781.25 kbit/s
0 1 1 0 1 1 64 390.63 kbit/s
0 1 1 1 0 0 128 195.31 kbit/s
0 1 1 1 0 1 256 97.66 kbit/s
0 1 1 1 1 0 512 48.83 kbit/s
0 1 1 1 1 1 1024 24.41 kbit/s
1 0 0 0 0 0 10 2.5 Mbit/s
1 0 0 0 0 1 20 1.25 Mbit/s
1 0 0 0 1 0 40 625 kbit/s
1 0 0 0 1 1 80 312.5 kbit/s
1 0 0 1 0 0 160 156.25 kbit/s
1 0 0 1 0 1 320 78.13 kbit/s
1 0 0 1 1 0 640 39.06 kbit/s
1 0 0 1 1 1 1280 19.53 kbit/s
1 0 1 0 0 0 12 2.08333 Mbit/s
1 0 1 0 0 1 24 1.04167 Mbit/s
1 0 1 0 1 0 48 520.83 kbit/s
1 0 1 0 1 1 96 260.42 kbit/s
1 0 1 1 0 0 192 130.21 kbit/s
1 0 1 1 0 1 384 65.10 kbit/s
1 0 1 1 1 0 768 32.55 kbit/s
1 0 1 1 1 1 1536 16.28 kbit/s
1 1 0 0 0 0 14 1.78571 Mbit/s
1 1 0 0 0 1 28 892.86 kbit/s
1 1 0 0 1 0 56 446.43 kbit/s
1 1 0 0 1 1 112 223.21 kbit/s
1 1 0 1 0 0 224 111.61 kbit/s
Table 17-7. Example SPI Baud Rate Selection (25 MHz Bus Clock) (Sheet 2 of 3)
SPPR2 SPPR1 SPPR0 SPR2 SPR1 SPR0 Baud Rate
Divisor Baud Rate
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
674 Freescale Semiconductor
17.3.2.4 SPI Status Register (SPISR)
Read: Anytime
Write: Has no effect
1 1 0 1 0 1 448 55.80 kbit/s
1 1 0 1 1 0 896 27.90 kbit/s
1 1 0 1 1 1 1792 13.95 kbit/s
1 1 1 0 0 0 16 1.5625 Mbit/s
1 1 1 0 0 1 32 781.25 kbit/s
1 1 1 0 1 0 64 390.63 kbit/s
1 1 1 0 1 1 128 195.31 kbit/s
1 1 1 1 0 0 256 97.66 kbit/s
1 1 1 1 0 1 512 48.83 kbit/s
1 1 1 1 1 0 1024 24.41 kbit/s
1 1 1 1 1 1 2048 12.21 kbit/s
Module Base +0x0003
76543210
R SPIF 0 SPTEF MODF 0 0 0 0
W
Reset00100000
= Unimplemented or Reserved
Figure 17-6. SPI Status Register (SPISR)
Table 17-8. SPISR Field Descriptions
Field Description
7
SPIF
SPIF Interrupt Flag — This bit is set after received data has been transferred into the SPI data register. For
information about clearing SPIF Flag, please refer to Table 17-9.
0 Transfer not yet complete.
1 New data copied to SPIDR.
5
SPTEF
SPI Transmit Empty Interrupt Flag — If set, this bit indicates that the transmit data register is empty. For
information about clearing this bit and placing data into the transmit data register, please refer to Table 17-10.
0 SPI data register not empty.
1 SPI data register empty.
4
MODF
Mode Fault Flag This bit is set if the SS input becomes low while the SPI is configured as a master and mode
fault detection is enabled, MODFEN bit of SPICR2 register is set. Refer to MODFEN bit description in
Section 17.3.2.2, “SPI Control Register 2 (SPICR2)”. The flag is cleared automatically by a read of the SPI status
register (with MODF set) followed by a write to the SPI control register 1.
0 Mode fault has not occurred.
1 Mode fault has occurred.
Table 17-7. Example SPI Baud Rate Selection (25 MHz Bus Clock) (Sheet 3 of 3)
SPPR2 SPPR1 SPPR0 SPR2 SPR1 SPR0 Baud Rate
Divisor Baud Rate
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 675
Table 17-9. SPIF Interrupt Flag Clearing Sequence
Table 17-10. SPTEF Interrupt Flag Clearing Sequence
XFRW Bit SPIF Interrupt Flag Clearing Sequence
0 Read SPISR with SPIF == 1 then Read SPIDRL
1 Read SPISR with SPIF == 1
then
Byte Read SPIDRL (1)
1. Data in SPIDRH is lost in this case.
or
Byte Read SPIDRH (2)
2. SPIDRH can be read repeatedly without any effect on SPIF. SPIF Flag is cleared only by the read
of SPIDRL after reading SPISR with SPIF == 1.
Byte Read SPIDRL
or
Word Read (SPIDRH:SPIDRL)
XFRW Bit SPTEF Interrupt Flag Clearing Sequence
0 Read SPISR with SPTEF == 1 then Write to SPIDRL (1)
1. Any write to SPIDRH or SPIDRL with SPTEF == 0 is effectively ignored.
1 Read SPISR with SPTEF == 1
then
Byte Write to SPIDRL 1(2)
2. Data in SPIDRH is undefined in this case.
or
Byte Write to SPIDRH 1(3)
3. SPIDRH can be written repeatedly without any effect on SPTEF. SPTEF Flag is cleared only by
writing to SPIDRL after reading SPISR with SPTEF == 1.
Byte Write to SPIDRL 1
or
Word Write to (SPIDRH:SPIDRL) 1
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
676 Freescale Semiconductor
17.3.2.5 SPI Data Register (SPIDR = SPIDRH:SPIDRL)
Read: Anytime; read data only valid when SPIF is set
Write: Anytime
The SPI data register is both the input and output register for SPI data. A write to this register
allows data to be queued and transmitted. For an SPI configured as a master, queued data is
transmitted immediately after the previous transmission has completed. The SPI transmitter empty
flag SPTEF in the SPISR register indicates when the SPI data register is ready to accept new data.
Received data in the SPIDR is valid when SPIF is set.
If SPIF is cleared and data has been received, the received data is transferred from the receive shift
register to the SPIDR and SPIF is set.
If SPIF is set and not serviced, and a second data value has been received, the second received data
is kept as valid data in the receive shift register until the start of another transmission. The data in
the SPIDR does not change.
If SPIF is set and valid data is in the rec eive shif t r egis ter, and SPIF is serviced before the start of
a third transmission, the data in the receive shift register is transferred into the SPIDR and SPIF
remains set (see Figure 17-9).
If SPIF is set and valid data is in the receive shif t register, and SPIF is serviced after the s tar t of a
third transmission, the data in the receive shift register has become invalid and is not transferred
into the SPIDR (see Figure 17-10).
Module Base +0x0004
76543210
RR15 R14 R13 R12 R11 R10 R9 R8
WT15 T14 T13 T12 T11 T10 T9 T8
Reset00000000
Figure 17-7. SPI Data Register High (SPIDRH)
Module Base +0x0005
76543210
RR7 R6 R5 R4 R3 R2 R1 R0
WT7 T6 T5 T4 T3 T2 T1 T0
Reset00000000
Figure 17-8. SPI Data Register Low (SPIDRL)
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 677
Figure 17-9. Reception with SPIF serviced in Time
Figure 17-10. Reception with SPIF serviced too late
17.4 Functional Description
The SPI module allows a duplex, synchronous, serial communication between the MCU and peripheral
devices. Software can poll the SPI status flags or SPI operation can be interrupt driven.
The SPI system is enabled by setting the SPI enable (SPE) bit in SPI control register 1. While SPE is set,
the four associated SPI port pins are dedicated to the SPI function as:
Slave select (SS)
Serial clock (SCK)
Master out/slave in (MOSI)
Master in/slave out (MISO)
Receive Shift Register
SPIF
SPI Data Register
Data A Data B
Data A
Data A Received Data B Received
Data C
Data C
SPIF Serviced
Data C Received
Data B
= Unspecified = Reception in progress
Receive Shift Register
SPIF
SPI Data Register
Data A Data B
Data A
Data A Received Data B Received
Data C
Data C
SPIF Serviced
Data C Received
Data B Lost
= Unspecified = Reception in progress
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
678 Freescale Semiconductor
The main element of the SPI system is the SPI data register. The n-bit1 data register in the master and the
n-bit1 data register in the slave are linked by the MOSI and MISO pins to form a distributed 2n-bit1
register. When a data transfer operation is performed, this 2n-bit1 register is serially shifted n1 bit positions
by the S-clock from the master , so data is exchanged between the master and the slave. Data written to the
master SPI data register becomes the output data for the slave, and data read from the master SPI data
register after a transfer operation is the input data from the slave.
A read of SPISR with SPTEF = 1 followed by a write to SPIDR puts data into the transmit data register.
When a transfer is complete and SPIF is cleared, received data is moved into the receive data register. This
data register acts as the SPI receive data register for reads and as the SPI transmit data register for writes.
A common SPI data register address is shared for reading data from the read data buffer and for writing
data to the transmit data register.
The clock phase control bit (CPHA) and a clock polarity control bit (CPOL) in the SPI control register 1
(SPICR1) select one of four possible clock formats to be used by the SPI system. The CPOL bit simply
selects a non-inverted or inverted clock. The CPHA bit is used to accommodate two fundamentally
different protocols by sampling data on odd numbered SCK edges or on even numbered SCK edges (see
Section 17.4.3, “Transmission Formats”).
The SPI can be configured to operate as a master or as a slave. When the MSTR bit in SPI control register1
is set, master mode is selected, when the MSTR bit is clear, slave mode is selected.
NOTE
A change of CPOL or MSTR bit while there is a received byte pending in
the receive shift register will destroy the received byte and must be avoided.
17.4.1 Master Mode
The SPI operates in master mode when the MSTR bit is set. Only a master SPI module can initiate
transmissions. A transmission begins by writing to the master SPI data register. If the shift register is
empty, data immediately transfers to the shift register. Data begins shifting out on the MOSI pin under the
control of the serial clock.
Serial clock
The SPR2, SPR1, and SPR0 baud rate selection bits, in conjunction with the SPPR2, SPPR1, and
SPPR0 baud rate preselection bits in the SPI baud rate register , control the baud rate generator and
determine the speed of the transmission. The SCK pin is the SPI clock output. Through the SCK
pin, the baud rate generator of the master controls the shift register of the slave peripheral.
MOSI, MISO pin
In master mode, the function of the serial data output pin (MOSI) and the serial data input pin
(MISO) is determined by the SPC0 and BIDIROE control bits.
•SS
pin
If MODFEN and SSOE are set, the SS pin is configured as slave select output. The SS output
becomes low during each transmission and is high when the SPI is in idle state.
If MODFEN is set and SSOE is cleared, the SS pin is configured as input for detecting mode fault
error. If the SS input becomes low this indicates a mode fault error where another master tries to
1. n depends on the selected transfer width, please refer to Section 17.3.2.2, “SPI Control Register 2 (SPICR2)
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 679
drive the MOSI and SCK lines. In this case, the SPI immediately switches to slave mode, by
clearing the MSTR bit and also disables the slave output buffer MISO (or SISO in bidirectional
mode). So the result is that all outputs are disabled and SCK, MOSI, and MISO are inputs. If a
transmission is in progress when the mode fault occurs, the transmission is aborted and the SPI is
forced into idle state.
This mode fault error also sets the mode fault (MODF) flag in the SPI status register (SPISR). If
the SPI interrupt enable bit (SPIE) is set when the MODF flag becomes set, then an SPI interrupt
sequence is also requested.
When a write to the SPI data register in the master occurs, there is a half SCK-cycle delay. After
the delay, SCK is started within the master. The rest of the transfer operation differs slightly,
depending on the clock format specified by the SPI clock phase bit, CPHA, in SPI control register 1
(see Section 17.4.3, “Transmission Formats”).
NOTE
A change of the bits CPOL, CPHA, SSOE, LSBFE, XFRW, MODFEN,
SPC0, or BIDIROE with SPC0 set, SPPR2-SPPR0 and SPR2-SPR0 in
master mode will abort a transmission in progress and force the SPI into idle
state. The remote slave cannot detect this, therefore the master must ensure
that the remote slave is returned to idle state.
17.4.2 Slave Mode
The SPI operates in slave mode when the MSTR bit in SPI control register 1 is clear.
Serial clock
In slave mode, SCK is the SPI clock input from the master.
MISO, MOSI pin
In slave mode, the function of the serial data output pin (MISO) and serial data input pin (MOSI)
is determined by the SPC0 bit and BIDIROE bit in SPI control register 2.
•SS pin
The SS pin is the slave select input. Before a data transmission occurs, the SS pin of the slave SPI
must be low. SS must remain low until the transmission is complete. If SS goes high, the SPI is
forced into idle state.
The SS input also controls the serial data output pin, if SS is high (not selected), the serial data
output pin is high impedance, and, if SS is low, the first bit in the SPI data register is driven out of
the serial data output pin. Also, if the slave is not selected (SS is high), then the SCK input is
ignored and no internal shifting of the SPI shift register occurs.
Although the SPI is capable of duplex operation, some SPI peripherals are capable of only
receiving SPI data in a slave mode. For these simpler devices, there is no serial data out pin.
NOTE
When peripherals with duplex capability are used, take care not to
simultaneously enable two receivers whose serial outputs drive the same
system slave’s serial data output line.
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
680 Freescale Semiconductor
As long as no more than one slave device drives the system slave’ s serial data output line, it is possible for
several slaves to receive the same transmission from a master, although the master would not receive return
information from all of the receiving slaves.
If the CPHA bit in SPI control register 1 is clear, odd numbered edges on the SCK input cause the data at
the serial data input pin to be latched. Even numbered edges cause the value previously latched from the
serial data input pin to shift into the LSB or MSB of the SPI shift register, depending on the LSBFE bit.
If the CPHA bit is set, even numbered edges on the SCK input cause the data at the serial data input pin to
be latched. Odd numbered edges cause the value previously latched from the serial data input pin to shift
into the LSB or MSB of the SPI shift register, depending on the LSBFE bit.
When CPHA is set, the first edge is used to get the first data bit onto the serial data output pin. When CPHA
is clear and the SS input is low (slave selected), the first bit of the SPI data is driven out of the serial data
output pin. After the nth1 shift, the transfer is considered complete and the received data is transferred into
the SPI data register. To indicate transfer is complete, the SPIF flag in the SPI status register is set.
NOTE
A change of the bits CPOL, CPHA, SSOE, LSBFE, MODFEN, SPC0, or
BIDIROE with SPC0 set in slave mode will corrupt a transmission in
progress and must be avoided.
17.4.3 Transmission Formats
During an SPI transmission, data is transmitted (shifted out serially) and received (shifted in serially)
simultaneously. The serial clock (SCK) synchronizes shifting and sampling of the information on the two
serial data lines. A slave select line allows selection of an individual slave SPI device; slave devices that
are not selected do not interfere with SPI bus activities. Optionally, on a master SPI device, the slave select
line can be used to indicate multiple-master bus contention.
Figure 17-11. Master/Slave Transfer Block Diagram
17.4.3.1 Clock Phase and Polarity Controls
Using two bits in the SPI control register 1, software selects one of four combinations of serial clock phase
and polarity.
1. n depends on the selected transfer width, please refer to Section 17.3.2.2, “SPI Control Register 2 (SPICR2)
SHIFT REGISTER
SHIFT REGISTER
BAUD RATE
GENERATOR
MASTER SPI SLAVE SPI
MOSI MOSI
MISO MISO
SCK SCK
SS SS
VDD
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 681
The CPOL clock polarity control bit specifies an active high or low clock and has no significant ef fect on
the transmission format.
The CPHA clock phase control bit selects one of two fundamentally different transmission formats.
Clock phase and polarity should be identical for the master SPI device and the communicating slave
device. In some cases, the phase and polarity are changed between transmissions to allow a master device
to communicate with peripheral slaves having different requirements.
17.4.3.2 CPHA = 0 Transfer Format
The first edge on the SCK line is used to clock the first data bit of the slave into the master and the first
data bit of the master into the slave. In some peripherals, the first bit of the slave’s data is available at the
slave’s data out pin as soon as the slave is selected. In this format, the first SCK edge is issued a half cycle
after SS has become low.
A half SCK cycle later , the second edge appears on the SCK line. When this second edge occurs, the value
previously latched from the serial data input pin is shifted into the LSB or MSB of the shift register,
depending on LSBFE bit.
After this second edge, the next bit of the SPI ma ster data is transmitted out of the serial data output pin of
the master to the serial input pin on the slave. This process continues for a total of 16 edges on the SCK
line, with data being latched on odd numbered edges and shifted on even numbered edges.
Data reception is double buffered. Data is shifted serially into the SPI shift register during the transfer and
is transferred to the parallel SPI data register after the last bit is shifted in.
After 2n1 (last) SCK edges:
Data that was previously in the master SPI data register should now be in the slave data register
and the data that was in the slave data register should be in the master.
The SPIF flag in the SPI status register is set, indicating that the transfer is complete.
Figure 17-12 is a timing diagram of an SPI transfer where CPHA = 0. SCK waveforms are shown for
CPOL = 0 and CPOL = 1. The diagram may be interpreted as a master or slave timing diagram because
the SCK, MISO, and MOSI pins are connected directly between the master and the slave. The MISO signal
is the output from the slave and the MOSI signal is the output from the master. The SS pin of the master
must be either high or reconfigured as a general-purpose output not affecting the SPI.
1. n depends on the selected transfer width, please refer to Section 17.3.2.2, “SPI Control Register 2 (SPICR2)
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
682 Freescale Semiconductor
Figure 17-12. SPI Clock Format 0 (CPHA = 0), with 8-bit Transfer Width selected (XFRW = 0)
tL
Begin End
SCK (CPOL = 0)
SAMPLE I
CHANGE O
SEL SS (O)
Transfer
SCK (CPOL = 1)
MSB first (LSBFE = 0):
LSB first (LSBFE = 1):
MSB
LSB
LSB
MSB
Bit 5
Bit 2
Bit 6
Bit 1
Bit 4
Bit 3
Bit 3
Bit 4
Bit 2
Bit 5
Bit 1
Bit 6
CHANGE O
SEL SS (I)
MOSI pin
MISO pin
Master only
MOSI/MISO
tT
If next transfer begins here
for tT
, tl, tL
Minimum 1/2 SCK
tItL
tL = Minimum leading time before the first SCK edge
tT = Minimum trailing time after the last SCK edge
tI = Minimum idling time between transfers (minimum SS high time)
tL, tT
, and tI are guaranteed for the master mode and required for the slave mode.
1 234 56 78910111213141516
SCK Edge Number
End of Idle State Begin of Idle State
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 683
Figure 17-13. SPI Clock Format 0 (CPHA = 0), with 16-Bit Transfer Width selected (XFRW = 1)
In slave mode, if the SS line is not deasserted between the successive transmis sions then the content of the
SPI data register is not transmitted; instead the last received data is transmitted. If the SS line is deasserted
for at least minimum idle time (half SCK cycle) between successive transmissions, then the content of the
SPI data register is transmitted.
In master mode, with slave select output enabled the SS line is always deasserted and reasserted between
successive transfers for at least minimum idle time.
17.4.3.3 CPHA = 1 Transfer Format
Some peripherals require the first SCK edge before the first data bit becomes available at the data out pin,
the second edge clocks data into the system. In this format, the first SCK edge is issued by setting the
CPHA bit at the beginning of the n1-cycle transfer operation.
The first edge of SCK occurs immediately after the half SCK clock cycle synchronizati on delay. This first
edge commands the slave to transfer its first data bit to the serial data input pin of the master.
A half SCK cycle later, the second edge appears on the SCK pin. This is the latching edge for both the
master and slave.
1. n depends on the selected transfer width, please refer to Section 17.3.2.2, “SPI Control Register 2 (SPICR2)
tL
Begin End
SCK (CPOL = 0)
SAMPLE I
CHANGE O
SEL SS (O)
Transfer
SCK (CPOL = 1)
MSB first (LSBFE = 0)
LSB first (LSBFE = 1)
MSB
LSB
LSB
MSB
Bit 13
Bit 2
Bit 14
Bit 1
Bit 12
Bit 3
Bit 11
Bit 4
Bit 5
CHANGE O
SEL SS (I)
MOSI pin
MISO pin
Master only
MOSI/MISO
tT
If next transfer begins here
for tT
, tl, tL
Minimum 1/2 SCK
tItL
tL = Minimum leading time before the first SCK edge
tT = Minimum trailing time after the last SCK edge
tI = Minimum idling time between transfers (minimum SS high time)
tL, tT
, and tI are guaranteed for the master mode and required for the slave mode.
12345678910111213141516
SCK Edge Number
End of Idle State Begin of Idle State
17181920212223242526272829303132
Bit 10Bit 9Bit 8Bit 7Bit 6 Bit 4 Bit 3 Bit 2 Bit 1
Bit 6Bit 5 Bit 7 Bit 8 Bit 9 Bit 10Bit 11 Bit 12Bit 13Bit 14
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
684 Freescale Semiconductor
When the third edge occurs, the value previously latched from the serial data input pin is shifted into the
LSB or MSB of the SPI shift register , depending on LSBFE bit. After this edge, the next bit of the master
data is coupled out of the serial data output pin of the master to the serial input pin on the slave.
This process continues for a total of n1 edges on the SCK line with data being latched on even numbered
edges and shifting taking place on odd numbered edges.
Data reception is double buffered, data is serially shifted into the SPI shift register during the transfer and
is transferred to the parallel SPI data register after the last bit is shifted in.
After 2n1 SCK edges:
Data that was previously in the SPI data register of the master is now in the data register of the
slave, and data that was in the data register of the slave is in the master.
The SPIF flag bit in SPISR is set indic ating that the transfer is complete.
Figure 17-14 shows two clocking variations for CPHA = 1. The diagram may be interpreted as a master
or slave timing diagram because the SCK, MISO, and MOSI pins are connected directly between the
master and the slave. The MISO signal is the output from the slave, and the MOSI signal is the output from
the master. The SS line is the slave select input to the slave. The SS pin of the master must be either high
or reconfigured as a general-purpose output not affecting the SPI.
Figure 17-14. SPI Clock Format 1 (CPHA = 1), with 8-Bit Transfer Width selected (XFRW = 0)
tLtT
for tT
, tl, tL
Minimum 1/2 SCK
tItL
If next transfer begins here
Begin End
SCK (CPOL = 0)
SAMPLE I
CHANGE O
SEL SS (O)
Transfer
SCK (CPOL = 1)
MSB first (LSBFE = 0):
LSB first (LSBFE = 1):
MSB
LSB
LSB
MSB
Bit 5
Bit 2
Bit 6
Bit 1
Bit 4
Bit 3
Bit 3
Bit 4
Bit 2
Bit 5
Bit 1
Bit 6
CHANGE O
SEL SS (I)
MOSI pin
MISO pin
Master only
MOSI/MISO
tL = Minimum leading time before the first SCK edge, not required for back-to-back transfers
tT = Minimum trailing time after the last SCK edge
tI = Minimum idling time between transfers (minimum SS high time), not required for back-to-back transfers
1 234 56 78910111213141516SCK Edge Number
End of Idle State Begin of Idle State
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 685
Figure 17-15. SPI Clock Format 1 (CPHA = 1), with 16-Bit Transfer Width selected (XFRW = 1)
The SS line can remain active low between successive transfers (can be tied low at all times). This format
is sometimes preferred in systems having a single fixed master and a single slave that drive the MISO data
line.
Back-to-back transfers in master mode
In master mode, if a transmission has completed and new data is available in the SPI data register ,
this data is sent out immediately without a trailing and minimum idle time.
The SPI interrupt request flag (SPIF) is common to both the master and slave modes. SPIF gets set one
half SCK cycle after the last SCK edge.
17.4.4 SPI Baud Rate Generation
Baud rate generation consists of a series of divider stages. Six bits in the SPI baud rate register (SPPR2,
SPPR1, SPPR0, SPR2, SPR1, and SPR0) determine the divisor to the SPI module clock which results in
the SPI baud rate.
The SPI clock rate is determined by the product of the value in the baud rate preselection bits
(SPPR2–SPPR0) and the value in the baud rate selection bits (SPR2–SPR0). The module clock divisor
equation is shown in Equation 17-3.
tL
Begin End
SCK (CPOL = 0)
SAMPLE I
CHANGE O
SEL SS (O)
Transfer
SCK (CPOL = 1)
MSB first (LSBFE = 0)
LSB first (LSBFE = 1)
MSB
LSB
LSB
MSB
Bit 13
Bit 2
Bit 14
Bit 1
Bit 12
Bit 3
Bit 11
Bit 4
Bit 5
CHANGE O
SEL SS (I)
MOSI pin
MISO pin
Master only
MOSI/MISO
tT
If next transfer begins here
for tT
, tl, tL
Minimum 1/2 SCK
tItL
tL = Minimum leading time before the first SCK edge, not required for back-to-back transfers
tT = Minimum trailing time after the last SCK edge
tI = Minimum idling time between transfers (minimum SS high time), not required for back-to-back transfers
12345678910111213141516
SCK Edge Number
End of Idle State Begin of Idle State
17181920212223242526272829303132
Bit 10Bit 9Bit 8Bit 7Bit 6 Bit 4 Bit 3 Bit 2 Bit 1
Bit 6Bit 5 Bit 7 Bit 8 Bit 9 Bit 10Bit 11 Bit 12Bit 13Bit 14
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
686 Freescale Semiconductor
BaudRateDivisor = (SPPR + 1) 2(SPR + 1) Eqn. 17-3
When all bits are clear (the default condition), the SPI module clock is divided by 2. When the selection
bits (SPR2–SPR0) are 001 and the preselection bits (SPPR2–SPPR0) are 000, the module clock divisor
becomes 4. When the selection bits are 010, the module clock divisor becomes 8, etc.
When the preselection bits are 001, the divisor determined by the selection bits is multiplied by 2. When
the preselection bits are 010, the divisor is multiplied by 3, etc. See Table 17-7 for baud rate calculations
for all bit conditions, based on a 25 MHz bus clock. The two sets of selects allows the clock to be divided
by a non-power of two to achieve other baud rates such as divide by 6, divide by 10, etc.
The baud rate generator is activated only when the SPI is in master mode and a serial transfer is taking
place. In the other cases, the divider is disabled to decrease IDD current.
NOTE
For maximum allowed baud rates, please refer to the SPI Electrical
Specification in the Electricals chapter of this data sheet.
17.4.5 Special Features
17.4.5.1 SS Output
The SS output feature automatically drives the SS pin low during transmission to select external devices
and drives it high during idle to deselect external devices. When SS output is selected, the SS output pin
is connected to the SS input pin of the external device.
The SS output is available only in master mode during normal SPI operation by asserting SSOE and
MODFEN bit as shown in Table 17-3.
The mode fault feature is disabled while SS output is enabled.
NOTE
Care must be taken when using the SS output feature in a multimaster
system because the mode fault feature is not ava ilable for detecting system
errors between masters.
17.4.5.2 Bidirectional Mode (MOMI or SISO)
The bidirectional mode is selected when the SPC0 bit is set in SPI control register 2 (see Table 17-11). In
this mode, the SPI uses only one serial data pin for the interface with external device(s). The MSTR bit
decides which pin to use. The MOSI pin becomes the serial data I/O (MOMI) pin for the master mode, and
the MISO pin becomes serial data I/O (SISO) pin for the slave mode. The MISO pin in master mode and
MOSI pin in slave mode are not used by the SPI.
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 687
The direction of each serial I/O pin depends on the BIDIROE bit. If the pin is configured as an output,
serial data from the shift register is driven out on the pin. The same pin is also the serial input to the shift
register.
The SCK is output for the master mode and input for the slave mode.
The SS is the input or output for the master mode, and it is always the input for the slave mode.
The bidirectional mode does not affect SCK and SS functions.
NOTE
In bidirectional master mode, with mode fault enabled, both data pins MISO
and MOSI can be occupied by the SPI, though MOSI is normally used for
transmissions in bidirectional mode and MISO is not used by the SPI. If a
mode fault occurs, the SPI is automatically switched to slave mode. In this
case MISO becomes occupied by the SPI and MOSI is not used. This must
be considered, if the MISO pin is used for another purpose.
17.4.6 Error Conditions
The SPI has one error condition:
Mode fault error
17.4.6.1 Mode Fault Error
If the SS input becomes low while the SPI is configured as a master, it indicates a system error where more
than one master may be trying to drive the MOSI and SCK lines simultaneously. This condition is not
permitted in normal operation, the MODF bit in the SPI status register is set automatically, provided the
MODFEN bit is set.
In the special case where the SPI is in master mode and MODFEN bit is cleared, the SS pin is not used by
the SPI. In this special case, the mode fault error function is inhibited and MODF remains cleared. In case
Table 17-11. Normal Mode and Bidirectional Mode
When SPE = 1 Master Mode MSTR = 1 Slave Mode MSTR = 0
Normal Mode
SPC0 = 0
Bidirectional Mode
SPC0 = 1
SPI
MOSI
MISO
Serial Out
Serial In
SPI
MOSI
MISO
Serial In
Serial Out
SPI
MOMI
Serial Out
Serial In
BIDIROE
SPI
SISO
Serial In
Serial Out
BIDIROE
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
688 Freescale Semiconductor
the SPI system is configured as a slave, the SS pin is a dedicated input pin. Mode fault error doesn’ t occur
in slave mode.
If a mode fault error occurs, the SPI is switched to slave mode, with the exception that the slave output
buffer is disabled. So SCK, MISO, and MOSI pins are forced to be high impedance inputs to avoid any
possibility of conflict with another output driver. A transmission in progress is aborted and the SPI is
forced into idle state.
If the mode fault error occurs in the bidirectional mode for a SPI system configured in master mode, output
enable of the MOMI (MOSI in bidirectional mode) is cleared if it was set. No mode fault error occurs in
the bidirectional mode for SPI system configured in slave mode.
The mode fault flag is cleared automatically by a read of the SPI status register (with MODF set) followed
by a write to SPI control register 1. If the mode fault flag is cleared, the SPI becomes a normal master or
slave again.
NOTE
If a mode fault error occurs and a received data byte is pending in the receive
shift register, this data byte will be lost.
17.4.7 Low Power Mode Options
17.4.7.1 SPI in Run Mode
In run mode with the SPI system enable (SPE) bit in the SPI control register clear, the SPI system is in a
low-power, disabled state. SPI registers remain accessible, but clocks to the core of this module are
disabled.
17.4.7.2 SPI in Wait Mode
SPI operation in wait mode depends upon the state of the SPISWAI bit in SPI control register 2.
If SPISWAI is clear, the SPI operates normally when the CPU is in wait mode
If SPISWAI is set, SPI clock generation ceases and the SPI module enters a power conservation
state when the CPU is in wait mode.
If SPISWAI is set and the SPI is configured for master, any transmission and reception in
progress stops at wait mode entry. The transmission and reception resumes when the SPI exits
wait mode.
If SPISWAI is set and the SPI is configured as a slave, any transmission and reception in
progress continues if the SCK continues to be driven from the master. This keeps the slave
synchronized to the master and the SCK.
If the master transmits several byte s while the sla ve is in wait mode, the slave will continue to
send out bytes consistent with the operation mode at the start of wait mode (i.e., if the slave is
currently sending its SPIDR to the master, it will continue to send the same byte. Else if the slave
is currently sending the last received byte from the master, it will continue to send each previous
master byte).
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 689
NOTE
Care must be taken when expecting data from a master while the slave is in
wait or stop mode. Even though the shift register will continue to operate,
the rest of the SPI is shut down (i.e., a SPIF interrupt will not be generated
until exiting stop or wait mode). Also, the byte from the shift register will
not be copied into the SPIDR register until after the slave SPI has exited wait
or stop mode. In slave mode, a received byte pending in the receive shift
register will be lost when entering wait or stop mode. An SPIF flag and
SPIDR copy is generated only if wait mode is entered or exited during a
tranmission. If the slave enters wait mode in idle mode and exits wait mode
in idle mode, neither a SPIF nor a SPIDR copy will occur.
17.4.7.3 SPI in Stop Mode
S top mode is dependent on the system. The SPI enters stop mode when the module clock is disabled (held
high or low). If the SPI is in master mode and exchanging data when the CPU enters stop mode, the
transmission is frozen until the CPU exits stop mode. After stop, data to and from the external SPI is
exchanged correctly. In slave mode, the SPI will stay synchronized with the master.
The stop mode is not dependent on the SPISWAI bit.
17.4.7.4 Reset
The reset values of registers and signals are described in Section 17.3, “Memory Map and Register
Definition”, which details the registers and their bit fields.
If a data transmission occurs in slave mode after reset without a write to SPIDR, it will transmit
garbage, or the data last received from the master before the reset.
Reading from the SPIDR after reset will always read zeros.
17.4.7.5 Interrupts
The SPI only originates interrupt requests when SPI is enabled (SPE bit in SPICR1 set). The following is
a description of how the SPI makes a request and how the MCU should acknowledge that request. The
interrupt vector offset and interrupt priority are chip dependent.
The interrupt flags MODF, SPIF, and SPTEF are logically ORed to generate an interrupt request.
17.4.7.5.1 MODF
MODF occurs when the master detects an error on the SS pin. The master SPI must be configured for the
MODF feature (see Table 17-3). After MODF is set, the current trans fer is aborted and the following bit is
changed:
MSTR = 0, The master bit in SPICR1 resets.
The MODF interrupt is reflected in the status register MODF flag. Clearing the flag will also clear the
interrupt. This interrupt will stay active while the MODF flag is set. MODF has an automatic clearing
process which is described in Section 17.3.2.4, “SPI Status Register (SPISR)”.
Chapter 17 Serial Peripheral Interface (S12SPIV5)
MC9S12ZVM Family Reference Manual Rev. 2.2
690 Freescale Semiconductor
17.4.7.5.2 SPIF
SPIF occurs when new data has been received and copied to the SPI data register. After SPIF is set, it does
not clear until it is serviced. SPIF has an automatic clearing process, which is described in Section 17.3.2.4,
“SPI Status Register (SPISR)”.
17.4.7.5.3 SPTEF
SPTEF occurs when the SPI data register is ready to accept new data. After SPTEF is set, it does not clear
until it is serviced. SPTEF has an automatic clearing process, which is described in Section 17.3.2.4, “SPI
Status Register (SPISR)”.
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 691
Chapter 18
Gate Drive Unit (GDU)
18.1 Differences GDUV4 vs GDUV5 vs GDUV6
Table 18-1. Revision History Table
Version
Number Revision Date Description of Changes
V6 Initial
Draft 25-January-
2015 Initial Draft based on GDUV4/V5 with following changes for SR
Motor support:
additional drain connections LD[2:0] for SR motor drive
GDUCTR1 register with control bits for SR motor drive
Removed EPRES control bit functionality for V5 and V6
Changed GSUF startup flag functionality for V6
Draft B 02-February-
2015 Removed EPRES for all versions
GDU startup flag GSUP reset with power on reset
Included feedback from shared review
Draft C 10-March-
2015 Added Reserved bit to GDUCTR1 register
Draft D 25-April-2015 Added EPRES function for GDU V4 because there is an Errata
for EPRES function
Table 18-2. GDUV4/V5/V6 Differences(1)
Feature GDU V4 GDU V5 GDU V6
Number of Overcurrent threshold
bits for overcurrent comparator 0/1
GOCT0[3:0] ,
GOCT1[3:0]
GOCT0[4:0] ,
GOCT1[4:0]
GOCT0[4:0], GOCT1[4:0]
VLS level select control bit
GVLSLVL
not available available available
Current sense amplifier offset adjustable in 5mV
steps
adjustable in 3mV
steps
adjustable in 3mV steps
On chip bootstrap diode not available, off
chip bootstrap diode
required
available not available, off chip bootstrap diode
required
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
692 Freescale Semiconductor
The GDU module is a Field Effect Transistor (FET) pre-driver designed for three phase motor control
applications.
18.1.1 Features
The GDU module includes these distinctive features:
11V voltage regulator for FET pre-drivers
Boost converter option for low supply voltage condition
3-phase bridge FET pre-drivers
Bootstrap circuit for high-side FET pre-drivers with external bootstrap capacitor
Charge pump for static high-side driver operation
Phase voltage measurement with internal ADC
Two low-side current measurement amplifiers for DC phase current measurement
Phase comparators for BEMF zero crossing detection in sensorless BLDC applications
Voltage measurement on HD pin (DC-Link voltage) with internal ADC
Desaturation comparator for high-side drivers and low-side drivers protection
Undervoltage detection on FET pre-driver supply pin VLS
Two overcurrent comparators with programmable voltage threshold
Overvoltage detection on 3-phase bridge supply HD pin
18.1.2 Modes of Operation
The GDU module behaves as follows in the system power modes:
1. Run mode
Desaturation filter bits
GDSFLS/GDSFHS
not available available available
Fault[3] output to PMF driven by GLVLSIF driven by GLVLSF driven by GLVLSF
Fault[4] output to PMF driven by GHHDIF driven by GHHDF driven by GHHDF
Low-side drivers on or off out of
reset dependant on NVM option
not available not available available
additional drain connections
LD[2:0] to external low-side power
FETs
not available not available available
Control bits GSRMOD1/0 for SR
motor drive
not available not available available
1. Refer to device overview for maskset / GDU version info.
Table 18-2. GDUV4/V5/V6 Differences(1)
Feature GDU V4 GDU V5 GDU V6
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 693
All features are available.
2. Wait mode
All features are available.
3. Stop mode
The GDU is disabled in stop mode. The high-side drivers, low-side drivers, charge pump, voltage
regulator, boost circuit, and current sense amplifier are switched off. The GDU will weakly pull
the gates of the MOSFET to their source potential. On entering stop mode the GDUE register bits
are cleared. GFDE=0, GCPE=0, GBOE=0, GCSE1=0 and GCSE0=0.
NOTE
The device does not support putting the MOSFET in specific state during
stop mode as GDU charge pump clock is not running. This means device
can not be put in stop mode if FETs needs to be in specific state to protect
the system from external energy supply (e.g. externally driven motor -
generator).
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
694 Freescale Semiconductor
18.1.3 Block Diagram
Figure shows a block diagram of the GDU module.
Figure 18-1. GDU Block Diagram
HD
VBS[2:0]
HG[2:0]
HS[2:0]
VLS[2:0]
LG[2:0]
LS[2:0]
LD[2:0]
(only on GDUV6)
VSSB
BST
CP
VCP
VSUP
VLS_OUT
AMP[1:0]
AMPM[1:0]
AMPP[1:0]
Boost Converter
Option
Charge
Pump
Two Current Sense
Amplifiers
Voltage
Regulator
Register
Level Shifters
FET
Pre-Drivers
Control
Error
ADC
Channels
PWM
Channels
IP Bus
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 695
18.2 External Signal Description
18.2.1 HD — High-Side Drain Connection
This pin is the power supply for the 3-phase bridge (DC-link voltage).
NOTE
The HD pin should be connected as near as possible to the drain connections
of the high-side MOSFETs.
18.2.2 VBS[2:0] — Bootstrap Capacitor Connection Pins
The pins are the bootstrap capacitor connections for phases HS[2:0]. The capacitor is connected between
HS[2:0] and this pin. The bootstrap capacitor provides the gate voltage and current to drive the gate of the
external power FET.
18.2.3 HG[2:0] — High-Side Gate Pins
The pins are the gate drives for the high-side power FETs. The drivers provide a high current with low
impedance to turn on and off the high-side power FETs.
18.2.4 HS[2:0] — High-Side Source Pins
The pins are the source connection for the high-side power FETs and the drain connection for the low-side
power FETs. The low voltage end of the bootstrap capacitor is also connected to this pin.
18.2.5 VLS[2:0] — Voltage Supply for Low-Side Pre-Drivers
The pins are the voltage supply pins for the three low-side FET pre-drivers. These pins should be
connected to the voltage regulator output pin VLS_OUT. The output voltage on VLS_OUT pin is typically
VVLS=11V.
NOTE
It is recommended to add a 110nF-220nF X7R ceramic capacitor close to
each VLS pin.
18.2.6 LG[2:0] — Low-Side Gate Pins
The pins are the gate drives for the low-side power FETs. The drivers provide a high current with low
impedance to turn on and off the the low-side power FETs.
18.2.7 LD[2:0] — Low-Side Gate Pins (only on GDUV6)
These pins are the drain connections for the low-side power FETs.
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
696 Freescale Semiconductor
18.2.7.1 LS[2:0] — Low-Side Source Pins
The pins are the low-side source connections for the low-side power FETs. The pins are the power ground
pins used to return the gate currents from the low-side power FETs.
18.2.7.2 AMPP[1:0] — Current Sense Amplifier Non-Inverting Input Pins
These pins are the non-inverting inputs to the current sense amplifiers.
18.2.7.3 AMPM[1:0] — Current Sense Amplifier Inverting Input Pins
These pins are the inverting inputs to the current sense amplifiers.
18.2.7.4 AMP[1:0] — Current Sense Amplifier Output Pins
These pins are the outputs of the current sense amplifie rs. At the MCU level these pins are shared with
ADC channels. For ADC channel assignment, see MCU pinout section.
18.2.7.5 CP — Charge Pump Output Pin
This pin is the switching node of the charge pump circuit. The supply voltage for charge pump driver is
the output of the voltage regulator VVLS. The output voltage of this pin switches typically between 0V and
11V.
18.2.7.6 VCP — Charge Pump Input for High-Side Driver Supply
This pin is the charge pump input for the high-side FET pre-driver supply VBS[2:0].
18.2.7.7 BST — Boost Converter Pin
This pin provides the basic switching elements required to implement a boost converter for low battery
voltage conditions. This requires external diodes, capacitors and a coil.
18.2.7.8 VSSB — Boost Ground Pin
This pin is a separate power ground pin for the on chip boost converter switching device.
18.2.7.9 VSUP — Battery Voltage Supply Input Pin
This pin should be connected to the battery voltage. It is the input voltage to the integrated voltage
regulator. The output of the voltage regulator is pin VLS_OUT.
18.2.7.10 VLS_OUT — Voltage Regulator Output Pin
This pin is the output of the integrated voltage regulator. The ouput voltage is typically VVLS=11V. The
input voltage to the voltage regulator is the VSUP pin.
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 697
NOTE
A 4.7uF or 10uF capacitor should be connected to this pin for stability of the
the voltage regulator output.
18.3 Memory Map and Register Definition
This section provides the detailed information of all registers for the GDU module.
18.3.1 Register Summary
Figure 18-2 shows the summary of all implemented registers inside the GDU module.
NOTE
Register Address = Module Base Address + Address Offset, where the
Module Base Address is defined at the MCU level and the Address Offset
is defined at the module level.
Address Offset
Register Name Bit 7 6 5 4 3 2 1 Bit 0
0x0000
GDUE
RGWP 0EPRES(1) GCSE1 GBOE GCSE0 GCPE GFDE
W
0x0001
GDUCTR
RGHHDLVL GVLSLVL
(2) GBKTIM2[3:0] GBKTIM1[1:0]
W
0x0002
GDUIE
R0 0 0 GOCIE[1:0] GDSEIE GHHDIE GLVLSIE
W
0x0003
GDUDSE
R0 GDHSIF[2:0] 0GDLSIF[2:0]
W
0x0004
GDUSTAT
R GPHS[2:0] GOCS[1:0] GHHDS GLVLSS
W
0x0005
GDUSRC
R0 GSRCHS[2:0] 0GSRCLS[2:0]
W
0x0006
GDUF
RGSUF GHHDF GLVLSF GOCIF[1:0] 0GHHDIF GLVLSIF
W
0x0007
GDUCLK1
R0 GBOCD[4:0] GBODC[1:0]
W
= Unimplemented
Figure 18-2. GDU Register Summary
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
698 Freescale Semiconductor
18.3.2 Register Descriptions
This section consists of register descriptions in address order. Each description includes a standard register
diagram with an associated figure number. Details of register bit and field function follow the register
diagrams, in bit order. Unused bits read back zero.
0x0008
GDUBCL
R0 0 0 0 GBCL[3:0]
W
0x0009
GDUPHMUX
R000000 GPHMX[1:0]
W
0x000A
GDUCSO
R0 GCSO1[2:0] 0GCSO0[2:0]
W
0x000B
GDUDSLVL
RGDSFHS
(1) GDSLHS[2:0] GDSFLS
(1) GDSLLS[2:0]
W
0x000C
GDUPHL
R 0 0 0 0 0 GPHL[2:0]
W
0x000D
GDUCLK2
R0 0 0 0 GCPCD[3:0]
W
0x000E
GDUOC0
RGOCA0 GOCE0 0GOCT0[4:0](3)
W
0x000F
GDUOC1
RGOCA1 GOCE1 0GOCT1[4:0](4)
W
0x0010
GDUCTR1
RGSRMOD[1:0](5) 00000
Reserved
(6)
W
0x0011-
0x001F
1. Only available on GDU V4
2. Not available on GDUV4
3. On GDUV4 only GOCT0[3:0] available
4. On GDUV4 only GOCT1[3:0] available
5. Not available on GDUV4 and V5
6. This bit is implemented on GDUV6.
Address Offset
Register Name Bit 7 6 5 4 3 2 1 Bit 0
= Unimplemented
Figure 18-2. GDU Register Summary
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 699
18.3.2.1 GDU Module Enable Register (GDUE)
Module Base + 0x0000 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write protected bits only if GWP=0. On entry in stop mode bits GCSE0, GCSE1, GBOE, GCPE & GFDE are
cleared. After exit from stop mode write protected bits GBOE, GCPE & GFDE can be written once when GWP=1.
76543210
R
GWP
0
EPRES(2)
2. Only available on GDU V4
GCSE1 GBOE GCSE0 GCPE GFDE
W
Reset00000001
= Unimplemented
Figure 18-3. GDU Module Enable Register (GDUE)
Table 18-3. GDUE Register Field Description
Field Description
7
GWP
GDU Write ProtectThis bit enables write protection to be used for the write protectable bits. While clear, GWP
allows write protectable bits to be written. When set GWP prevents any further writes to write protectable bits.
Once set , GWP is cleared by reset.
0 Write-protectable bits may be written
1 Write-protectable bits cannot be written
5
EPRES
GDU Enable High-Side Driver Preserve Functionality This bit controls the bootstrap charge preserve mode
of the high-side drivers. If EPRES is set and the high-side driver is switched off the input current of the VBSx pins is
reduced by typically 100uA in order to preserve the charge on the bootstrap capacitor. This bit cannot be modified
after GWP bit is set.
0 High-side driver preserve functionality disabled
1 High-side driver preserve functionality enabled
4
GCSE1
GDU Current Sense Amplifier 1 Enable— This bit enables the current sense amplifier. See
18.4.8Section 18.4.8, “Current Sense Amplifier and Overcurrent Comparator
0 Current sense amplifier 1 is disabled
1 Current sense amplifier 1 is enabled
3
GBOE
GDU Boost Converter Enable — This bit enables the boost option. This bit cannot be modified after GWP bit is
set. See Section 18.4.10, “Boost Converter
0 Boost option is disabled
1 Boost option is enabled
2
GCSE0
GDU Current Sense Amplifier 0 Enable— This bit enables the current sense amplifier. See Section 18.4.8,
“Current Sense Amplifier and Overcurrent Comparator
0 Current sense amplifier 0 is disabled
1 Current sense amplifier 0 is enabled
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 700
1
GCPE
GDU Charge Pump Enable — This bit enables the charge pump. This bit cannot be modified after GWP bit is
set. See Section 18.4.4, “Charge Pump
0 Charge pump is disabled
1 Charge pump is enabled
0
GFDE
GDU FET Pre-Driver Enable — This bit enables the low-side and high-side FET pre-drivers. This bit cannot be
modified after GWP bit is set.See Section 18.4.2, “Low-Side FET Pre-Drivers and Section 18.4.3, “High-Side FET
Pre-Driver.
0 Low-side and high-side drivers are disabled
1 Low-side and high-side drivers are enabled
NOTE
It is not allowed to set and clear GFDE bit periodically in order
to switch on and off the FET pre- drivers. In order to switch on
and off the FET pre-drivers the PMF module has to be used to
mask and un-mask the PWM channels.
Table 18-3. GDUE Register Field Description
Field Description
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 701
18.3.2.2 GDU Control Register (GDUCTR)
NOTE
The register bits GBKTIM1 and GBKTIM2 must be set to the required
values before the PWM channel is activated. Once the PWM channel is
activated, the value of GBKTIM1 & GBKTIM2 must not change. If a
different blanking time is required, the PWM channel has to be turned off
before new values to GBKTIM1 & GBKTIM2 are written.
Module Base + 0x0001 Access: User read/write(1)
1. Read: Anytime
Write: Only if GWP=0
76543210
R
GHHDLVL GVLSLVL GBKTIM2[3:0] GBKTIM1[1:0]
W
Reset01010000
= Unimplemented
Figure 18-4. GDU Control Register (GDUCTR)
Table 18-4. GDUCTR Register Field Descriptions
Field Description
7
GHHDLVL
GDU High HD Level Select — Selects the voltage threshold of the overvoltage detection on HD pin.
This bit cannot be modified after GWP bit is set.
0 Voltage thresholds of the overvoltage detection on HD pin configured for VHVHDLA and VHVHDLD
1 Voltage thresholds of the overvoltage detection on HD pin configured for VHVHDHA and VHVHDHD
6
GVLSLVL
(Not featured
on GDUV4)
GDU VLS Level Select — Selects the voltage threshold of the undervoltage detection on VLS pin.
This bit cannot be modified after GWP bit is set.
0 Voltage thresholds of the undervoltage detection on VLS pin configured for VLVLSLA and VLVLSLD
1 Voltage thresholds of the undervoltage detection on VLS pin configured for VLVLSHA and VLVLSHD
5-2
GBKTIM2[3:0]
GDU Blanking Time — These bits adjust the blanking time tBLANK of the desaturation error comparators. The
resulting blanking time tBLANK can be calculated from the equation below. For GBKTIM2[3:0]=$F no
desaturation errors are captured and the drivers are unprotected and the charge pump will not connect to the
high-side drivers. These bits cannot be modified after GWP bit is set.
1-0
GBKTIM1[1:0]
GDU Blanking Time — These bits adjust the blanking time tBLANK of the desaturation error comparators. The
resulting blanking time tBLANK can be calculated from the equation in the field description below.These bits
cannot be modified after GWP bit is set.
tBLANK GBKTIM2 1+
·2GBKTIM1 1+
2+TBUS
=
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 702
18.3.2.3 GDU Interrupt Enable Register (GDUIE)
18.3.2.4 GDU Desaturation Error Flag Register (GDUDSE)
Module Base + 0x0002 Access: User read write(1)
1. Read: Anytime
Write: Anytime
76543210
R000
GOCIE[1:0] GDSEIE GHHDIE GLVLSIE
W
Reset00000000
= Unimplemented
Figure 18-5. GDU Interrupt Enable Register (GDUIE)
Table 18-5. GDUIE Register Field Descriptions
Field Description
4-3
GOCIE[1:0]
GDU Overcurrent Interrupt Enable — Enables overcurrent interrupt.
0 No interrupt will be requested if any of the flags GOCIF[1:0] in the GDUF register is set
1 Interrupt will be requested if any of the flags GOCIF[1:0] in the GDUF register is set
2
GDSEIE
GDU Desaturation Error Interrupt Enable — Enables desaturation error interrupt on low-side or high-side
drivers
0 No interrupt will be requested if any of the flags in the GDUDSE register is set
1 Interrupt will be requested if any of the flags in the GDUDSE register is set
1
GHHDIE
GDU High HD Interrupt Enable — Enables the high HD interrupt.
0 No interrupt will be requested whenever GHHDIF flag is set
1 Interrupt will be requested whenever GHHDIF flag is set
0
GLVLSIE
GDU Low VLS Interrupt Enable — Enables the interrupt which indicates low VLS supply
0 No interrupt will be requested whenever GLVLSIF flag is set
1 Interrupt will be requested whenever GLVLSIF flag is set
Module Base + 0x0003 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear
76543210
R0 GDHSIF[2:0] 0GDLSIF[2:0]
W
Reset00000000
= Unimplemented
Figure 18-6. GDU Desaturation Error Flag Register (GDUDSE)
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 703
Table 18-6. GDUDSE Register Field Descriptions
Field Description
6-4
GDHSIF[2:0]
GDU High-Side Driver Desaturation Interrupt Flags — The flag is set by hardware to “1” when a
desaturation error on associated high-side driver pin HS[2:0] occurs. If the GDSEIE bit is set an interrupt is
requested. Writing a logic “1” to the bit field clears the flag.
0 No desaturation error on high-side driver
1 Desaturation error on high-side driver
2-0
GDLSIF[2:0]
GDU Low-Side Driver Desaturation Interrupt Flag — The flag is set to “1” when a desaturation error on
associated low-side driver pin LS[2:0] occurs. If the GDSEIE bit is set an interrupt is requested. Writing a logic
“1” to the bit field clears the flag.
0 No desaturation error on low-side driver
1 Desaturation error on low-side driver
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 704
18.3.2.5 GDU Status Register (GDUSTAT)
18.3.2.6 GDU Slew Rate Control Register (GDUSRC)
Module Base + 0x0004 Access: User read only(1)
1. Read: Anytime
Write: Never
76543210
R GPHS[2:0] GOCS[1:0] 0 GHHDS GLVLSS
W
Reset00000000
= Unimplemented
Figure 18-7. GDU Status Register (GDUSTAT)
Table 18-7. GDUSTAT Register Field Descriptions
Field Description
7-5
GPHS[2:0]
GDU Phase Status — The status bits are set to 1 when the voltage on associated pin HS[2:0] is greater than
VHD/2. The flags are cleared when the voltage on associated pin HS[2:0] is less than VHD/2. See Section 18.4.6,
“Phase Comparators
0 Voltage on pin HSx is VHSx < VHD/2
1 Voltage on pin HSx is VHSx > VHD/2
4-3
GOCS[1:0]
GDU Overcurrent Status — The status bits are set to 1 when the voltage on the overcurrent comparator input
is above the threshold voltage VOCT. The flag is cleared when the voltage on the overcurrent comparator input
is less than VOCT.Section 18.4.8, “Current Sense Amplifier and Overcurrent Comparator
0 Voltage on overcurrent comparator input is is less than VOCT
1 Voltage on overcurrent comparator is greater than VOCT
1
GHHDS
GDU High HD Supply Status — The status bit is set to 1 when the voltage on HD pin is above the threshold
voltage VHVHDLA or VHVHDHA depending on the value of the GHHDLVL bit. The flag is cleared when the voltage
on HD pin is less than VHVHDLD or VHVHDHD depending on the value of the GHHDLVL bit.
0 Voltage on pin HD is less than VHVHDLD or VHVHDHD
1 Voltage on pin HD is greater than VHVHDLA or VHVHDHA
0
GLVLSS
GDU Low VLS Status — The status bit is set to 1 when the voltage on VLS_OUT pin is below the threshold
voltage VLVLSA. The flag is cleared when the voltage on VLS_OUT pin is greater than VLVLSD.
0 Voltage on pin VLS_OUT is greater than VLVLSD
1 Voltage on pin VLS_OUT is less than VLVLSA
Module Base + 0x0005 Access: User read/write(1)
76543210
R0
GSRCHS[2:0]
0
GSRCLS[2:0]
W
Reset01000100
= Unimplemented
Figure 18-8. GDU Slew Rate Control Register (GDUSRC)
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 705
1. Read: Anytime
Write: Only if GWP=0
Table 18-8. GDU Slew Rate Control Register Field Descriptions
Field Description
6:4
GSRCHS[2:0]
GDU Slew Rate Control Bits High-Side FET Pre-Drivers — These bits control the slew rate on the HG[2:0]
pins (see FET Pre-Driver Details) .These bits cannot be modified after GWP bit is set.
000 : slowest
.
.
111 : fastest
3:0
GSRCLS[2:0]
GDU Slew Rate Control Bits Low-Side FET Pre-Drivers — These bits control the slew rate on the LG[2:0]
pins (see FET Pre-Driver Details). These bits cannot be modified after GWP bit is set.
000 : slowest
.
.
111 : fastest
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 706
18.3.2.7 GDU Flag Register (GDUF)
Module Base + 0x0006 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear flag
76543210
R
GSUF GHHDF GLVLSF GOCIF[1:0]
0
GHHDIF GLVLSIF
W
Reset 1/F(2)
2. On GDU V4/V5 the startup flag is cleared by reset and set by HW after reset deasserts. On GDU V6 the flag is cleared by reset
and loaded from flash option field after reset deasserts.
0X
(3)
3. Out of power on reset the flags may be set.
0000X
(3)
= Unimplemented
Figure 18-9. GDU Flag Register (GDUF)
Table 18-9. GDUF Register Field Descriptions
Field Description
GDU V6
7
GSUF
GDU Start-up Flag The start-up flag is loaded from the flash option field after system reset deasserts. Writing
a logic “1” to the bit field clears the flag. If the flag is set all high-side FET pre-drivers are turned off and all low-
side FET pre-drivers are turned on. If the flag is cleared and there is no error condition present all high-side and
low-side FET pre-drivers are driven by the pwm channels.
0 High-side and low-side FET pre-drivers are driven by pwm channels
1 High-side FET pre-drivers turned off and low-side FET pre-drivers are turned on
GDU V4 and V5
7
GSUF
GDU Start-up Flag — The start-up flag is set by hardware on the first clock edge after system reset deasserts.
Writing a logic “1” to the bit field clears the flag one bus cycle after writing “1”. If the flag is set all high-side FET
pre-drivers are turned off and all low-side FET pre-drivers are turned on. If the flag is cleared and there is no
error condition present all high-side and low-side FET pre-drivers are driven by the pwm channels.
0 High-side and low-side FET pre-drivers are driven by pwm channels
1 High-side FET pre-drivers turned off and low-side FET pre-drivers are turned on
6
GHHDF
GDU High VHD Supply Flag The flag controls the state of the FET pre-drivers. If the flag is set and
GOCA1=0 the high-side pre-drivers are turned off and the low-side pre-drivers are turned on. If GOCA1=1 all
high-side and low-side FET pre-drivers are turned off. If the flag is cleared and no other error condition is
present the high-side and low-side pre-drivers are driven by the PWM channels. The flag is set by hardware if
a high voltage condition on HD pin occurs. The flag is set if the voltage on pin HD is greater than the threshold
voltage VHVHDLA or VHVHDHA . Writing a logic “1” to the bit field clears the flag.
0 Voltage on pin HD is less than VHVHDLD or VHVHDHD
1 Voltage on pin HD is greater than VHVHDLA or VHVHDHA
5
GLVLSF
GDU Low VLS Supply Flag — The flag controls the state of the FET pre-drivers. If the flag is set all high-side
and low-side pre-drivers are turned off. If the flag is cleared and no other error condition is present the high-side
and low-side pre-drivers are driven by the PWM channels. The flag is set by hardware if a low voltage condition
on VLS_OUT pin occurs. The flag is set if the voltage on pin VLS drops below the threshold voltage VLVLSA.
Writing a logic “1” to the bit field clears the flag.
0 VLS Supply is above VLVLSD
1 VLS Supply is below VLVLSA, all high-side and low-side FET pre-drivers are turned off
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 707
NOTE
The purpose of the GSUF flag is to allow dissipation of the energy in the
motor coils through the low side FET s in case of short reset pulses whilst the
motor is spinning.
4-3
GOCIF[1:0]
GDU Overcurrent Interrupt Flag — The interrupt flags are set by hardware if an overcurrent condition occurs.
The flags are set if the voltage on the overcurrent comparator input is greater than the threshold voltage VOCT
.
If the GOCIE bit is set an interrupt is requested. Writing a logic “1” to the bit field clears the flag. If the GOCAx
bit is cleared all high-side FET pre-drivers are turned off and fault[4] is asserted. If GOCAx is set all high-side
and low-side FET pre-drivers are turned off and fault[2:0] are asserted.
0 Voltage on overcurrent comparator input is less than VOCT
1 Voltage on overcurrent comparator is greater than VOCT
1
GHHDIF
GDU High VHD Supply Interrupt Flag— The interrupt flag is set by hardware if GHHDF is set or if GHHDS is
cleared. If the GHHDIE bit is set an interrupt is requested. Writing a logic “1” to the bit field clears the flag.
0
GLVLSIF
GDU Low VLS Supply Interrupt Flag— The interrupt flag is set by hardware if GLVLSF is set or GLVLSS is
cleared. If the GLVLSIE bit is set an interrupt is requested.Writing a logic “1” to the bit field clears the flag.
Table 18-9. GDUF Register Field Descriptions
Field Description
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 708
18.3.2.8 GDU Clock Control Register 1 (GDUCLK1)
NOTE
The GBODC & GBOCD register bits must be set to the required value
before GBOE bit is set. If a different boost clock frequency and duty cycle
is required GBOE has to be cleared before new values to GBODC &
GBOCD are written.
Module Base + 0x0007 Access: User read/write(1)
1. Read: Anytime
Write: Anytime if GWP=0
76543210
R0
GBOCD[4:0] GBODC[1:0]
W
Reset00000000
Figure 18-10. GDU Clock Control Register 1 (GDUCLK1)
Table 18-10. GDUCLK1 Register Field Descriptions
Field Description
6-2
GBOCD[4:0]
GDU Boost Option Clock Divider — These bits select the clock divider factor which is used to divide down
the bus clock frequency fBUS for the boost converter clock f
BOOST. These bits cannot be modified after GWP bit
is set. See Table 18-11 for divider factors. See also Section 18.4.10, “Boost Converter
1-0
GBODC[1:0]
GDU Boost Option Clock Duty Cycle— These bits select the duty cycle of the boost option clock fboost. For
GBOCD[4]= 0 the duty cycle of the boost option clock is always 50%. These bits cannot be modified after GWP
bit is set.
00 Duty Cycle = 50%
01 Duty Cycle = 25%
10 Duty Cycle = 50%
11 Duty Cycle = 75%
Table 18-11. Boost Option Clock Divider Factors k = fBUS / fBOOST
GBOCD[4:0] fBOOST
00000 fBUS / 4
00001 fBUS / 4
00010 fBUS / 4
00011 fBUS / 4
00100 fBUS / 4
00101 fBUS / 4
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 709
00110 fBUS / 6
00111 fBUS / 6
01000 fBUS / 8
01001 fBUS / 8
01010 fBUS / 10
01011 fBUS / 10
01100 fBUS / 12
01101 fBUS / 12
01110 fBUS / 14
01111 fBUS / 14
10000 fBUS / 16
10001 fBUS / 24
10010 fBUS / 32
10011 fBUS / 48
10100 fBUS / 64
10101 fBUS / 96
10110 fBUS / 100
10111 fBUS / 128
11000 fBUS / 192
11001 fBUS / 200
11010 fBUS / 256
11011 fBUS / 384
11100 fBUS / 400
11101 fBUS / 512
11110 fBUS / 768
11111 fBUS / 800
Table 18-11. Boost Option Clock Divider Factors k = fBUS / fBOOST
GBOCD[4:0] fBOOST
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 710
18.3.2.9 GDU Boost Current Limit Register (GDUBCL)
18.3.2.10 GDU Phase Mux Register (GDUPHMUX)
Module Base + 0x0008 Access: User read/write(1)
1. Read: Anytime
Write: Anytime if GWP=0
76543210
R0000
GBCL[3:0]
W
Reset00000000
Figure 18-11. GDU Boost Current Limit Register (GDUBCL)
Table 18-12. GDU Boost Current Limit Register Field Descriptions
Field Description
GBCL[3:0] GDU Boost Current Limit RegisterThese bits are used to adjust the boost coil current limit ICOIL0,16 on the
BST pin. These bits cannot be modified after GWP bit is set. See GDU electrical parameters.
Module Base + 0x0009 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R000000
GPHMX[1:0]
W
Reset00000000
= Unimplemented
Figure 18-12. GDU Phase Mux Register (GDUPHMUX)
Table 18-13. GDU Phase Mux Register Field Descriptions
Field Description
[1:0]
GPHMUX
GDU Phase Multiplexer — These buffered bits are used to select the voltage which is routed to internal ADC
channel.The value written to the GDUPHMUX register does not take effect until the LDOK bit is set and the next
PWM reload cycle begins. Reading GDUPHMUX register reads the value in the buffer. It is not necessary the
value which is currently used.
00 Pin HD selected , VHD / 12 connected to ADC channel
01 Pin HS0 selected , VHS0 / 6 connected to ADC channel
10 Pin HS1 selected , VHS1 / 6 connected to ADC channel
11 Pin HS2 selected, VHS2 / 6 connected to ADC channel
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 711
18.3.2.11 GDU Current Sense Offset Register (GDUCSO)
18.3.2.12 GDU Desaturation Level Register (GDUDSLVL)
Module Base + 0x000A Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0
GCSO1[2:0]
0
GCSO0[2:0]
W
Reset00000000
= Unimplemented
Figure 18-13. GDU Current Sense Offset (GDUCSO)
Table 18-14. GDUCSO Register Field Descriptions
Field Description (See also Section 18.4.8, “Current Sense Amplifier and Overcurrent Comparator)
6:4
GCSO1[2:0]
GDU Current Sense Amplifier 1 Offset — These bits adjust the offset of the current sense amplifier
000 No offset
001 Offset is +3mV (GDUV5 and V6). Offset is +5mV (GDUV4).
010 Offset is +6mV (GDUV5 and V6). Offset is +10mV (GDUV4)
011 Offset is +9mV (GDUV5 and V6). Offset is +15mV (GDUV4)
100 No offset
101 Offset is -9mV (GDUV5 and V6). Offset is -15mV (GDUV4)
110 Offset is -6mV (GDUV5 and V6). Offset is -10mV (GDUV4).
111 Offset is -3mV (GDUV5 and V6). Offset is -5mV (GDUV4).
2:0
GCSO0[2:0]
GDU Current Sense Amplifier 0 Offset — These bits adjust the offset of the current sense amplifier.
000 No offset
001 Offset is +3mV (GDUV5 and V6). Offset is +5mV (GDUV4).
010 Offset is +6mV (GDUV5 and V6). Offset is +10mV (GDUV4)
011 Offset is +9mV (GDUV5 and V6). Offset is +15mV (GDUV4)
100 No offset
101 Offset is -9mV (GDUV5 and V6). Offset is -15mV (GDUV4)
110 Offset is -6mV (GDUV5 and V6). Offset is -10mV (GDUV4).
111 Offset is -3mV (GDUV5 and V6). Offset is -5mV (GDUV4).
Module Base + 0x000B Access: User read/write(1)
1. Read: Anytime
Write: Only if GWP=0
76543210
R
GDSFHS GDSLHS[2:0] GDSFLS GDSLLS[2:0]
W
Reset00000111
= Unimplemented
Figure 18-14. GDU Desaturation Level Register (GDUDSLVL)
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 712
Table 18-15. GDU Desaturation Level Register Field Descriptions
Field Description
7
GDSFHS
(Not featured
on GDUV4)
GDU Desaturation Filter Characteristic for High-Side Drivers — This bit adjusts the desaturation filter
characteristic of the three high-side FET pre-drivers. These bits cannot be modified after GWP bit is set. See
Section 18.4.5, “Desaturation Error.
6:4
GDSLHS
GDU Desaturation Level for High-Side Drivers — These bits adjust the desaturation levels of the three high-
side FET pre-drivers. These bits cannot be modified after GWP bit is set. See Section 18.4.5, “Desaturation
Error
000 Vdesaths = VHD - 0.35V
001 Vdesaths = VHD - 0.50V
010 Vdesaths = VHD - 0.65V
011 Vdesaths = VHD - 0.80V
100 Vdesaths = VHD - 0.95V
101 Vdesaths = VHD - 1.10V
110 V desaths = VHD - 1.25V
111 V desaths = VHD - 1.40V
3
GDSFLS
(Not featured
on GDUV4)
GDU Desaturation Filter Characteristic for Low-Side Drivers — This bit adjusts the desaturation filter
characteristic of the three low-side FET pre-drivers. These bits cannot be modified after GWP bit is set. See
Section 18.4.5, “Desaturation Error.
.
2:0
GDSLLS
GDU Desaturation Level for Low-Side Drivers — These bits adjust the desaturation level of the three low-
side FET pre-drivers. These bits cannot be modified after GWP bit is set. See Section 18.4.5, “Desaturation
Error
000 Vdesatls = 0.35V
001 Vdesatls = 0.50V
010 Vdesatls = 0.65V
011 Vdesatls = 0.80V
100 Vdesatls = 0.95V
101 Vdesatls = 1.10V
110 V desatls = 1.25V
111 V desatls = 1.40V
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 713
18.3.2.13 GDU Phase Log Register (GDUPHL)
18.3.2.14 GDU Clock Control Register 2 (GDUCLK2)
NOTE
The GCPCD bits must be set to the required value before GCPE bit is set. If
a different char ge pump clock frequency is required GCPE has to be cleared
before new values to GCPCD bits are written.
Module Base + 0x000C Access: User read only(1)
1. Read: Anytime
Write: never
76543210
R 0 0 0 0 0 GPHL[2:0]
W
Reset00000000
= Unimplemented
Figure 18-15. GDU Phase Log Register (GDUPHL)
Table 18-16. GDU Phase Log Register Field Descriptions
Field Description
2:0
GPHL
GDU Phase Log Bits— If a desaturation error occurs the phase status bits GPHS[2:0] in register GDUSTAT
are copied to this register. The GDUPHL register is cleared only on reset. See Section 18.4.5, “Desaturation
Error
Module Base + 0x000D Access: User read/write(1)
1. Read: Anytime
Write: Only if GWP=0
76543210
R0000
GCPCD[3:0]
W
Reset00000000
Figure 18-16. GDU Clock Control Register 2 (GDUCLK2)
Table 18-17. GDUCLK2 Register Field Descriptions
Field Description
3-0
GCPCD[3:0]
GDU Charge Pump Clock Divider — These bits select the clock divider factor which is used to divide down
the bus clock frequency fBUS for the charge pump clock fCP. See Table 18-18 for divider factors. These bits
cannot be modified after GWP bit is set. See also Section 18.4.4, “Charge Pump
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 714
Table 18-18. Charge Pump Clock Divider Factors k = fBUS / fCP
GCPCD[3:0] fCP
0000 fBUS / 16
0001 fBUS / 24
0010 fBUS / 32
0011 fBUS / 48
0100 fBUS / 64
0101 fBUS / 96
0110 fBUS / 100
0111 fBUS / 128
1000 fBUS / 192
1001 fBUS / 200
1010 fBUS / 256
1011 fBUS / 384
1100 fBUS / 400
1101 fBUS / 512
1110 fBUS / 768
1111 fBUS / 800
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 715
18.3.2.15 GDU Overcurrent Register 0 (GDUOC0)
Module Base + 0x000E Access: User read/write(1)
1. Read: Anytime
Write: Only if GWP=0
76543210
R
GOCA0 GOCE0
0
GOCT0[4:0]
W
Reset00000000
= Unimplemented
Figure 18-17. GDU Overcurrent Register 0 (GDUOC0)
Table 18-19. GDUOC0 Register Field Descriptions
Field Description
7
GOCA0
GDU Overcurrent Action This bit cannot be modified after GWP bit is set. This bit controls the action in case
of an overcurrent event. See Table 18-25 and Table 18-24
6
GOCE0
GDU Overcurrent Comparator Enable — This bit cannot be modified after GWP bit is set.
0 Overcurrent Comparator is disabled
1 Overcurrent Comparator is enabled
GDUV4 (includes GOCT0 bits 3:0)
3:0
GOCT0[3:0]
GDU Overcurrent Comparator Threshold — These bits cannot be modified after GWP bit is set. The
overcurrent comparator threshold voltage is the output of a 6-bit digital-to-analog converter. The upper two bits
of the digital inputs are tied to one. The other bits of the digital inputs are driven by GOCT0. The overcurrent
comparator threshold voltage can be calculated from equation below.
GDUV5 and V6 (includes GOCT0 bits 4:0)
4:0
GOCT0[4:0]
GDU Overcurrent Comparator Threshold — These bits cannot be modified after GWP bit is set. The
overcurrent comparator threshold voltage is the output of a 6-bit digital-to-analog converter. The upper bit of the
digital inputs is tied to one. The other bits of the digital inputs are driven by GOCT0. The overcurrent comparator
threshold voltage can be calculated from equation below.
Voct0 48 GOCT0+
VDDA
64
------------------
=
Voct0 32 GOCT0+
VDDA
64
------------------
=
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 716
18.3.2.16 GDU Overcurrent Register 1 (GDUOC1)
Module Base + 0x000F Access: User read/write(1)
1. Read: Anytime
Write: Only if GWP=0
76543210
R
GOCA1 GOCE1
0
GOCT1[4:0]
W
Reset00000000
= Unimplemented
Figure 18-18. GDU Overcurrent Register 1 (GDUOC1)
Table 18-20. GDUOC1 Register Field Descriptions
Field Description
7
GOCA1
GDU Overcurrent Action This bit cannot be modified after GWP bit is set. This bit controls the action in case
of an overcurrent event or overvoltage event. See Table 18-25 and Table 18-24
6
GOCE1
GDU Overcurrent Enable — This bit cannot be modified after GWP bit is set.
0 Overcurrent Comparator 1 is disabled
1 Overcurrent Comparator 1 is enabled
GDUV4 (includes GOCT1 bits 3:0)
3:0
GOCT1[3:0]
GDU Overcurrent Comparator Threshold — These bits cannot be modified after GWP bit is set. The
overcurrent comparator threshold voltage is the output of a 6-bit digital-to-analog converter. The upper two bits
of the digital inputs are tied to one. The other bits of the digital inputs are driven by GOCT1. The overcurrent
comparator threshold voltage can be calculated from equation below.
GDUV5 and V6 (includes GOCT1 bits 4:0)
4:0
GOCT1[4:0]
GDU Overcurrent Comparator Threshold — These bits cannot be modified after GWP bit is set. The
overcurrent comparator threshold voltage is the output of a 6-bit digital-to-analog converter. The upper bit of the
digital inputs is tied to one. The other bits of the digital inputs are driven by GOCT1. The overcurrent comparator
threshold voltage can be calculated from equation below.
Voct1 48 GOCT1+
VDDA
64
------------------
=
Voct1 32 GOCT1+
VDDA
64
------------------
=
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 717
18.3.2.17 GDU Control Register 1 (GDUCTR1)
18.4 Functional Description
18.4.1 General
The PMF module provides the values to be driven onto the outputs of the low-side and high-side FET pre-
drivers. If the FET pre-drivers are enabled, the PMF channels drive their corresponding high-side or low-
side FET pre-drivers according Table 18-22.
Module Base + 0x0010 Access: User read/write(1)
1. Read: Anytime
Write: Only if GWP=0
76543210
R
GSRMOD1 GSRMOD0
00000
Reserved(2)
2. This reserved bit is implemented on GDUV6. It is not intended for general user access. Don’t set this bit. Setting this bit can alter
the GDU functionality.
W
Reset00000000
= Unimplemented
Figure 18-19. GDU Control Register 1 (GDUCTR1)
Table 18-21. GDUCTR1 Register Field Descriptions(1)
1. GDUCTR1 register only available on GDUV6.
Field Description
7
GSRMOD1
GDU Switched Reluctance Motor Mode 1 — This bit cannot be modified after GWP bit is set. This bit controls
the routing of the LDx pins to the low-side desaturation comparators for switched reluctance motor. See
Figure 18-23
0 HSx routed to low-side desaturation comparator
1 LDx routed to low-side desaturation comparator
6
GSRMOD0
GDU Switched Reluctance Motor Mode 0 — This bit cannot be modified after GWP bit is set.
0 BLDC mode. Don’t allow HGx and LGx high at the same time.
1 SR mode. Allow HGx and LGx high at the same time.
Table 18-22. PMF Channel Assignment
PMF
Channel PMF Channel Assignment
0 High-Side Gate and Source Pins HG[0], HS[0]
1 Low-Side Gate and Source Pins LG[0], LS[0]
2 High-Side Gate and Source Pins HG[1], HS[1]
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 718
18.4.2 Low-Side FET Pre-Drivers
The three low-side FET pre-drivers turn on and off the external low-side power FET s. The energy required
to charge the gate capacitance of the power FET CG is drawn from the output of the voltage regulator VLS.
See Figure 18-20. The register bits GSRCLS[2:0] in the GDUSRC Register (see Figure 18-8) control the
slew rate of the low-side FET pre-drivers in order to control fast voltage changes dv/dt (see also
Section 18.5.1, “FET Pre-Driver Details).
18.4.3 High-Side FET Pre-Driver
The three high-side FET pre-drivers turn on and off the external high-side power FETs. The required
charge for the gate capacitance of the external power FET is delivered by the bootstrap capacitor. After the
supply voltage is applied to the microcontroller or after exit from stop mode, the low-side FET pre-drivers
should be activated for a short time in order to charge the bootstrap capacitor CBS. Care must be taken after
a long period of inactivity of the low-side FET pre-drivers to verify that the bootstrap capacitor C BS is not
discharged.
The register bits GSRCHS[2:0] in the GDUSRC Register (see Figure 18-8) control the slew rate of the
high-side FET pre-driver in order to control fast voltage changes dv/dt (see also Section 18.5.1, “FET Pre-
Driver Details).
NOTE
The minimum PWM pulse on & off time must be tminpulse.
NOTE
If the GFDE bit is cleared the high-side gate and source pins and the low-
side gate and source pins are shorted with an internal resistor. The voltage
differences are VHGx-VHSx~ 0V and VLGx-VLSx ~ 0V so that the external
FETs are turned off.
NOTE
The PWM channel outputs for high-side and low-side drivers are delayed by
two core clock cycles.
3 Low-Side Gate and Source Pins LG[1], LS[1]
4 High-Side Gate and Source Pins HG[2], HS[2]
5 Low-Side Gate and Source Pins LG[2], LS[2]
Table 18-22. PMF Channel Assignment
PMF
Channel PMF Channel Assignment
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 719
Figure 18-20. FET Pre-Driver Circuit and Voltage Regulator
NOTE
Optional charge pump input RC filter can be used to avoid over pumping
effect when voltage spikes are present on the high-side drains.
-
Vref +
VBAT
hs_on
ls_on
VLS_OUT
CP
VCP
VBSx
HGx
HSx
VLSx
LGx
LSx
C1
D1
CBS
Rsense
VSUP
GSRCHS[2:0]
GSRCLS[2:0]
D4
D5
Reverse Battery
Protection
GCPE
GCPCD[3:0]
HD
GHHDIF
C2
100
220nF
optional charge pump filter
CG
CG
Charge Pump Connect
CFILT
RFILT
optional RC filter
to VBS pin
10uF
Bootstrap Transistor on P1
Diode only required
for GDUV4 and V6
P2
LDx (only on GDUV6)
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 720
NOTE
Optional RC filter to VBS pin should be used to avoid overshoot above
maximum voltage on VBS pin. The RC filter needs to be carefully designed
in order not to influence the charging time of the bootstrap capacitor CBS.
NOTE
GDUV4 and V6 does not include Bootstrap Transistor P1. It is only
available on GDUV5. An external bootstrap diode is required for GDUV4
and V6.
On GDUV5 the bootstrap transistor P1 is turned on when the corresponding
low-side driver is turned on and no high voltage condition on HD pin and
no desaturation error is flagged.
18.4.4 Charge Pump
The GDU module integrates the necessary hardware to build a charge pump with external components.The
charge pump is used to maintain the high-side driver gate source voltage VGS when PWM is running at
100% duty cycle. The external components needed are capacitors and diodes The supply voltage of the
charge pump driver on pin CP is VVLS. The output voltage on pin CP typically switches between 0 and
11V. The charge pump clock frequency depends on the setting of GCPCD bits.
The transistor P2 shown in Figure 18-20 connects VCP pin to VBSx pin. Figure 18-21 shows the timing
diagram when transistor P2 connects VCP to VBSx.
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 721
Figure 18-21. Timing Diagram Charge Pump Connect
GCPE
PWM
hs_on
HG
charge pump connect
tdelon
tHGON
tdelon / tdeloff : GDU propagation delay
tHGON / tHGOFF : HS driver turn on/off time
tBLANK: Blanking Time (see GDUCTR register)
During this time desaturation error
flags can be set and charge pump is
connected to VBSx
tBLANK
tHGOFF
tdeloff
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
722 Freescale Semiconductor
18.4.5 Desaturation Error
A desaturation error is generated if the output signal at HSx does not properly reflect the drive condition
of the low-side and high-side FET pre-drivers. The GDU integrates three desaturation comparators for the
low-side FET pre-drivers and three desaturation comparators for the high-side FET pre-drivers.
If the low-side power FET T2 (see Figure 18-23) is turned on and the drain source voltage VDS2 of T2 is
greater than Vdesatls after the blanking time tBLANK a desaturation error will be flagged. In this case the
associated desaturation error flag GDLSIF[2:0] will be set (see Figure 18-6) and the low-side power FET
T2 will be turned of f. The level of the voltage Vdesatls can be adjusted in the range of 0.35V to 1.40V (see
Figure 18-14).
If the high-side power FET T1 (see Figure 18-23) is turned on and the drain source voltage VDS1 is greater
than Vdesaths after the blanking time tBLANK a desaturation error will be flagged.In this case the associated
desaturation error flag GDHSIF[2:0] will be set (see Figure 18-6) and the high-side power FET T1 will be
turned off. The level of the voltage Vdesaths can be adjusted in the range of 0.35 to 1.40V (see Figure 18-
14).
NOTE
The filter on the output of desaturation comparators described below is only
available on GDUV5 and V6.
The output of the desaturation comparator of the low-side and high-side drivers are filtered. The filter
characteristic is controlled by the GDSFHS and GDSFLS bits as shown in Figure 18-22 and Table 18-23.
Figure 18-22. Filter Characteristic of Desaturation Comparator Output
Table 18-23. Filter Characteristic of Desaturation Comparator Output(1)
1. Table shows typical values which are not production tested.Values are derived
from simulation.
GDSFHS/GDSFLS tDSFHS tDSFLS
0 200ns 150ns
1 500ns 400ns
tDSFHS / tDSFLS
Desturation Comparator
Output
Desaturation Filter
output
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 723
The low-side and high-side desaturation interrupt flags GDHSIF and GDLSIF are cleared by writing a one
to the associated flag. After the flag is cleared the associated low-side or high-side FET pre-driver is
enabled again and is driven by the source selected in the PMF module.
Figure 18-23. Desaturation Comparators and Phase Comparators in BLDC Mode (LDx not connected)1
1. LDx pins and the routing option of HSx or LDx to the desaturation comparator of the low-side driver controlled by
GSRMOD1 is only available on GDUV6.
hs_on
ls_on
HGx
HSx
LGx
Rsense
VHD
-
+
VHD/2
+
-
Vdesatls
GDSLLS[2:0]
=
Desat. Comp.
Phase Comp.
Desaturation
Phase Status
Vdesaths
GDSLHS[2:0]
Desat. Comp.
Desaturation
VDS2
T1
T2
High-Side FET
Low-Side FET
Pre-Driver
Pre-Driver
LSx
VDS1
-
+
=
HD
Error High-Side.
GDSFHS
Filter
High-Side Driver
Error Low-Side.
Low-Side Driver
GDSFLS
Filter
LDx
GSRMOD1
BLDC Motor
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
724 Freescale Semiconductor
Figure 18-24. Desaturation Comparators and Phase Comparators in SR mode (LDx connected)1
18.4.6 Phase Comparators
The GDU module includes three phase comparators. The phase comparator s compares the voltage on the
HS[2:0] pins with one half voltage on HD pin. If VHSx is greater than 0.5 VHD the associated phase status
bit GPHS[2:0] is set. (see Figure 18-7) If the VHSx is less than 0.5 VHD the associated phase status bit
GPHS[2:0] is cleared. If a desaturation error is detected the state of the phase status bit GPHS[2:0] are
copied to the GDUPHL register. The phase flags get unlocked when the associated desaturation interrupt
flag is cleared.
1. LDx pins and the routing option of HSx or LDx to the desaturation comparator of the low-side driver controlled by
GSRMOD1 is only available on GDUV6.
hs_on
ls_on
HGx
HSx
LGx
Rsense
VHD
-
+
VHD/2
+
-
Vdesatls
GDSLLS[2:0]
=
Desat. Comp.
Phase Comp.
Desaturation
Phase Status
Vdesaths
GDSLHS[2:0]
Desat. Comp.
Desaturation
VDS2
T1
T2
High-Side FET
Low-Side FET
Pre-Driver
Pre-Driver
LSx
VDS1
-
+
=
HD
Error High-Side.
GDSFHS
Filter
High-Side Driver
Error Low-Side.
Low-Side Driver
GDSFLS
Filter
LDx
GSRMOD1
SR Motor
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 725
18.4.7 Fault Protection Features
The GDU includes a number of fault protection features against overvoltage, overcurrent, undervoltage
and power bridge faults like phase shorted to ground or supply. These fault protection features allow
selection of the appropriate low side and high side driver state in case of a fault condition, shown in
Table 18-25. In addition five fault outputs are provided to signal detected faults to other modules of the
MCU. For connectivity of the fault outputs see the device specific information. Table 18-24 shows the
logic equations for the five fault outputs.
Table 18-24. Fault Outputs Logic Equations(1)
1. Logic equations for Fault[3]and Faul t[4] are different on GDUV4,V5 and V6.
Fault Output Logic Equation
Fault[0] (GDLSIF[0] | GDHSIF[0]) | (GOCIF[0] & GOCA0) | (GOCIF[1] & GOCA1)
Fault[1] (GDLSIF[1] | GDHSIF[1]) | (GOCIF[0] & GOCA0) | (GOCIF[1] & GOCA1)
Fault[2] (GDLSIF[2] | GDHSIF[2]) | (GOCIF[0] & GOCA0) | (GOCIF[1] & GOCA1)
GDU V5 and V6
Fault[3] GLVLSF
Fault[4] GHHDF | (GOCIF[0] & ~GOCA0) | (GOCIF[1] & ~GOCA1)
GDUV4
Fault[3] GLVLSIF
Fault[4] GHHDIF | (GOCIF[0] & ~GOCA0) | (GOCIF[1] & ~GOCA1)
Chapter 18 Gate Drive Unit (GDU)
Freescale Semiconductor 726
Table 18-25. Fault Protection Features Summary
Prior
ity Condition GSUF GHHDF GOCIF0 GOCIF1 GLVLSF GDHSIF
[2:0]
GDLSIF
[2:0] HS2 HS1 HS0 LS2 LS1 LS0
low
high
normal operation,no error condition, FET
pre-driver driven by PMF module
0000 0000000
PWM
[4]
PWM
[2]
PWM
[0]
PWM
[5]
PWM
[3]
PWM
[1]
startup condition after reset deassert, no
error condition
1 0 0 0 0 000 000 off off off on/off
(1)
1. Startup condition of the low-side drivers LS[2:0] on GDUV6 depends on the flash option bit. On GDUV4 and V5 the low-side drivers are on out of reset.
on/off on/off
overvoltage on HD pin GOCA1=0 x 1 0 0 0 000 000 off off off on on on
overcurrent condition comparator 0
GOCA0=0
x x 1 x 0 000 000 off off off on on on
overcurrent condition comparator 1
GOCA1=0
x x x 1 0 000 000 off off off on on on
undervoltage condition on VLS_OUT pin x x x x 1 000 000 off off off off off off
overcurrent condition comparator 0
GOCA0=1
x x 1 x x 000 000 off off off off off off
overcurrent condition comparator 1
GOCA1=1
x x x 1 x 000 000 off off off off off off
desaturation error condition on high-side
FET pre-drivers
xxxx x001000PWM
[4]
PWM
[2]
off PWM
[5]
PWM
[3]
PWM
[1]
xxxx x010000PWM
[4]
off PWM
[0]
PWM
[5]
PWM
[3]
PWM
[1]
xxxx x100000offPWM
[2]
PWM
[0]
PWM
[5]
PWM
[3]
PWM
[1]
desaturation error condition on low-side
FET pre-drivers
xxxx x000001PWM
[4]
PWM
[2]
PWM
[0]
PWM
[5]
PWM
[3]
off
xxxx x000010PWM
[4]
PWM
[2]
PWM
[0]
PWM
[5]
off PWM
[1]
xxxx x000100PWM
[4]
PWM
[2]
PWM
[0]
off PWM
[3]
PWM
[1]
overvoltage on HD pin GOCA1=1 x 1 x x x xxx xxx off off off off off off
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 727
NOTE
Since all MOSFET transistors are turned off, VBSX can reach phase voltage
plus bootstrap voltage which may exceed allowable levels during high
supply voltage conditions. If such operating condition exist the application
must make sure that VBSX levels are clamped below maximum ratings for
example by using clamping diodes.
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
728 Freescale Semiconductor
Figure 18-25. Short to Supply Detection
Figure 18-26. Short to Ground Detection
LGx
HGx
HSx
Phase Status
Desat. Error
VHD
0.5 VHD
correct voltage on HSx
HSx shorted to supply
correct
fault
tBLANK
HGx
LGx
HSx
Phase Status
Desat. Error
VHD
0.5 VHD
correct voltage on HSx
HSx shorted to ground
correct
fault
tBLANK
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 729
18.4.8 Current Sense Amplifier and Overcurrent Comparator
The current sense amplifier is usually connected as a differential amplifier ( see Figure 18-27). It senses
the current flowing through the external power FET as a voltage across the current sense resistor Rsense.
In order to measure both positive and negative currents, an external reference has to be used. The output
of the current sense amplifier can be connected to an ADC channel. For more details on ADC channel
assignment, refer to Device Overview Internal Signal Mapping Section. The input offset voltage of the
current sense amplifier can be adjusted with the GCSO[2:0] bits in the GDUCSO register. (see Figure 18-
13) The output of the current sense amplifier is connected to the plus input of the overcurrent comparator.
The minus input is driven by the output voltage of a 6 Bit DA converter. The digital input of the DA
converter is {1 1,GOCTx[3:0]}. In order to use the overcurrent comparator GOCEx and GCSxE have to be
set.
NOTE
If both overcurrent comparators are used both action bits GOCA0 and
GOCA1 must have the same value. For example GOCA0=0 and GOCA1=1
is not allowed. Only GOCA0=GOCA1=1 or GOCA0=GOCA1=0 is
allowed.
Figure 18-27. Current Sense Amplifier Connected as Differential Amplifier
18.4.9 GDU DC Link Voltage Monitor
In addition to the feature described in Section 18.3.2.10, “GDU Phase Mux Register (GDUPHMUX) the
voltage on pin HD divide by 5 is routed to an ADC channel. See device specific information for ADC
channel number. This feature is only available if GFDE is set.
+
-
AMPP[0]
Rsense
Voffset
GCSO0[2:0]
=
AMPM[0]AMP[0]
Rn / aRn
Vref
=
Rp / a
Rp
Vsense
Output Voltage to ADC
VAMP = a Vsense + Vref
GCSE0
I
-
+
GOCEx
Voct
GOCTx[4:0]
Overcurrent Condition
a Vsense + Vref > Voct 6 bit
DAC
On GDUV4 only GOCTx[3:0] available.
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
730 Freescale Semiconductor
18.4.10 Boost Converter
The GDU module integrates the necessary hardware to build a boost converter with external components
in case of low voltage condition. The external components needed are two Schottky diodes, one coil, and
capacitors. See Figure 18-28. The boost converter clock which is driving the transistor T1 (see Figure 18-
28) is derived from the bus clock. This clock can be divided down as described in Table 18-10. The boost
converter also includes a circuit to limit the current through coil. This current limit can be adjusted with
the bits GBCL[3:0] in the GDUBCL register. See GDU electrical parameters.
The output voltage of the boost converter on VSUP pin is divided down and compared with a reference
voltage Vref . As long as the divided voltage VVSUP is below Vref the boost converter clock is enabled
assuming that GBOE (GDU Boost Option Enable) is set.
Figure 18-28. Boost Converter Option with external Components1
1. Diode D2 shown is optional if coil is connected behind reverse battery protection.
GBCL[3:0]
+
-
Vrefcl
=
R1
R2
+
-
VSSB
BST
=
VSUP
Vref
GBOCD[4:0]
GBOE
Clock Frequency
&
Duty Cycle
Bus Clock Input
Boost Converter Clock
Disable Enable
C1
D1
VBAT
D2
L
R
T1
Current Limitation
ICOIL
C2
Output Voltage Control
GBODC[1:0]
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 731
18.4.11 Interrupts
This section describes the interrupts generated in the GDU module. The interrupts are only available in
CPU run mode. Entering and exiting stop mode has no effect on the interrupt flags. The GDU module has
two interrupt vectors which are listed in Table 18-26. The low-side and high-side desaturation error flags
are combined into one interrupt line and the over and under voltage detection are combined into another
interrupt line. (see device specific section interrupt vector table)
Table 18-26. GDU Module Interrupt Sources
#GDU Module Interrupt
Source Module Internal Interrupt Source Local Enable
0 GDU desaturation error
interrupt
GDU low-side and high-side desaturation
error flags GDHSF[2:0] and GDLSF[2:0]
GDSEIE = 1
1 GDU over/under voltage
detection and overcurrent
detection interrupt
GDU low voltage condition on pin VLS
(GLVLSIF)
GLVLSIE = 1
GDU high voltage condition on pin HD
(GHHDIF)
GHHDIE = 1
GDU Overcurrent Condition
(GOCIF[1:0])
GOCIE[1:0]=11
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
732 Freescale Semiconductor
18.5 Application Information
18.5.1 FET Pre-Driver Details
The basic concept of the high-side driver is shown in Figure 18-29. If the FET pre-driver is switched on
the transistor T2 is driving the output HG. For on resistance Rgduon of transistor T2 refer to GDU
electricals. The output current is limited to IOUT which is derived from the reference current IREF. The
current source is controlled by the slew rate control bits GSRCHS[2:0]. If the FET pre-driver is switched
off transistors T3 and T4 are switched on. For on resistance R gduoffn and R gduoffp of transistors T3 and T4
refer to GDU electricals.
The reference current IREF is controlled by the slew rate control bits GSRCHS[2:0] :
•I
REF = 10uA + GSRCHS 10uA, [10uA, 20uA . . . 80uA]
Assuming an ideal op-amp the voltage across R1 is equal voltage across R2 and IOUT2 is given by:
•V
1 = V2 = IREF R1 = IOUT2 R2
•I
OUT2 = IREF (R1/R2)
With the ratio of the transistor sizes of T1 and T2 k=450, and the ratio of the resistors R1/R2=36, and
neglect the current through RHSpul the output current IOUT is:
•I
OUT1 = k IOUT2
•I
OUT = IOUT1 + IOUT2 = IREF (R1/R2) (1+k)
•I
OUT ~ IREF (R1/R2) k
Figure 18-29. FET Pre-Driver Concept for High-Side Driver
+
_
Rgduoffp
Rgduoffn
GSRCHS[2:0]
VBS
HG
HS
R1R2
Driver Off
Driver On
RHSpul
I
REF
I
out2
I
out1
I
out
T
1
T
2
T
3
T
4
V1V2
Rgduon
CG
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 733
NOTE
FET pre-driver concept shown in Figure 18-29 for the high-side driver
applies also to low-side driver . The reference current for the low-side driver
is controlled by GSRCLS[2:0].
18.5.2 GDU Intrinsic Dead Time
The basic point of dead time is to prevent cross conduction of the high-side and low-side power MOSFET s.
The GDU adds an amount of dead time to the PWM signals driving the high-side and low-side power
MOSFETs. A PWM signal applied to the input of the GDU does not appear instantly on the output. There
is propagation delay (tdelon, tdeloff) through the FET pre-drivers and it takes time to turn on and off the gates
of the power MOSFETs (tHGON, tHGOFF) (see Figure 18-30). The propagation delay and the turn on and
off time change over temperature. There are differences between propaga tion delay paths to the high-side
MOSFETs and low-side MOSFETs. Worst case must be considered. The turn on time tHGON depends also
on the setting of the slew rate control bits GSRCLS[2:0] and GSRCHS[2:0].
Figure 18-30. Driver on/off Delay and on/off Time1
Figure 18-31 shows examples of intrinsic dead times. For example assuming minimum values for tHGON
and tdelon for the high side gate HG0 and minimum values for tHGOFF and tdeloff for low-side gate LG0 no
additional dead time setting in the PMF module is required and the PWM channels can change at the same
time without cross conduction of the power MOSFETs.
1. Note that tHGON and tHGOFF is the turn on and turn off ti me for high-side and low -side gat e
tdelon tdeloff
tHGON tHGOFF
PWMx Channel
HGx/LGx
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
734 Freescale Semiconductor
Figure 18-31. Examples of Intrinsic Dead Time
PWM0
PWM1
tdelon_min
tHGOFF_max
dead time = tdelon_min - tdeloff_min - tHGOFF_min
tdelon_max
tdeloff_min
tdeloff_max
tHGOFF_min
tHGON_max
tHGON_min
HG0
min turn on delay
and min turn on time
HG0
max turn on delay
and max turn on time
LG0
min turn off delay
and min turn off time
LG0
max turn off delay
and max turn off time
dead time = tdelon_max - tdeloff_max - tHGOFF_max
dead time set in PMF
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 735
18.5.3 Calculation of Bootstrap Capacitor
The size of the bootstrap capacitor CBS depends on the total gate charge QG needed to turn on the power
FET used in the application. If the bootstrap capacitor is too small there can be a lar ge voltage drop due to
charge sharing betwee n bootstrap capacitor CBS and the total gate capaci tance of the power FET CG. The
resulting voltage on the gate of the power FET can be calculated as follow:
Eqn. 18-1
For example if CBS = 20 CG then the resulting gate voltage is VG = 0.95 VBS.
VGQBS
CBS CG
+
---------------------------VBS
1CG
CBS
------------
+
---------------------
==
Chapter 18 Gate Drive Unit (GDU)
MC9S12ZVM Family Reference Manual Rev. 2.2
736 Freescale Semiconductor
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 737
Chapter 19
LIN/HV Physical Layer (S12LINPHYV3)
Table 19-1. Revision History Table
19.1 Introduction
This chapter provides information for both the LIN physical interface and the HV interface. Devices
may include either a LINPHY or HVPHY module. The device overview section specifies the
LINPHY/HVPHY to device mapping.
The LIN (Local Interconnect Network) bus pin provides a physical layer for single-wire communication
in automotive applications. The LIN Physical Layer is designed to meet the LIN Physical Layer 2.2
specification from LIN consortium.
The HV physical interface provides a physical layer for single-wire communication. It can be used, among
other examples, for PWM applications since it can be connected to an internal timer.
NOTE
All references to LIN (e.g. names of bits, registers, signals, pins, interrupts,
etc.) apply to the HV physical interface as well. The same names have been
kept to highlight and facilitate the hardware and software compatibility
between both versions. Nevertheless, cases where particular LIN features do
not apply to the HV physical interface version are specifically mentioned.
Rev. No.
(Item No.)
Date
(Submitted By)
Sections
Affected Substantial Change(s)
V02.09 27 Jun 2013 Feature list - Added the SAE J2602-2 LIN compliance.
V02.10 21 Aug 2013
Overcurrent and
TxD-dominant
timeout interrupt
descriptions
- Specified the time after which the interrupt flags are set again after having
been cleared while the error condition is still present.
V02.11 19 Sep 2013 All - Removed preliminary note.
- Fixed grammar and spelling throughout the document.
V02.12 20 Sep 2013 Standby Mode - Clarified Standby mode behavior.
V02.13 8 Oct 2013 All - More grammar, spelling, and formating fixes throughout the document.
V03.01 08 May 2014 All - Added HV PHY feature.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
738 Freescale Semiconductor
19.1.1 Features
The LIN Physical Layer module includes the following distinctive features:
Compliant with LIN Physical Layer 2.2 specification.
Compliant with the SAE J2602-2 LIN standard.
Standby mode with glitch-filtered wake-up.
Slew rate selection optimized for the baud rates: 10.4 kbit/s, 20 kbit/s and Fast Mode (up to
250 kbit/s).
Switchable 34 k/330 k pullup resistors (in shutdown mode, 330 konly
Current limitation for LIN Bus pin falling edge.
Overcurrent protection.
LIN TxD-dominant timeout feature monitoring the LPTxD signal.
Automatic transmitter shutdown in case of an overcurrent or TxD-dominant timeout.
Fulfills the OEM “Hardware Requirements for LIN (CAN and FlexRay) Interfaces in Automotive
Applications” v1.3.
The HV Physical Layer module includes the following distinctive features:
Compliant with the ISO9141 (K-line) standard.
Standby mode with glitch-filtered wake-up.
Slew rate selection optimized for: 5.2 kHz, 10 kHz and Fast Mode (up to 125 kHz).
Switchable 34 k/330 k pullup resistors (in shutdown mode, 330 konly
Current limitation for LIN Bus pin falling edge.
Overcurrent protection.
The LIN/HV transmitter is a low-side MOSFET with current limitation and overcurrent transmitter
shutdown. A selectable internal pullup resistor with a serial diode structure is integrated, so no external
pullup components are required for the application in a slave node. T o be used as a master node, an external
resistor of 1 k must be placed in parallel between VLINSUP and the LIN Bus pin, with a diode between
VLINSUP and the resistor. The fall time from recessive to dominant and the rise time from dominant to
recessive is selectable and controlled to guarantee communication quality and reduce EMC emissions. The
symmetry between both slopes is guaranteed.
19.1.2 Modes of Operation
The LIN/HV Physical Layer can operate in the following four modes:
1. Shutdown Mode
The LIN/HV Physical Layer is fully disabled. No wake-up functionality is available. The internal
pullup resistor is replaced by a high ohmic one (330 k) to maintain the LIN Bus pin in the
recessive state. All registers are accessible.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 739
2. Normal Mode
The full functionality is available. Both receiver and transmitter are enabled.
3. Receive Only Mode
The transmitter is disabled and the receiver is running in full performance mode.
4. Standby Mode
The transmitter of the LIN/HV Physical Layer is disabled. If the wake-up feature is enabled, the
internal pullup resistor can be selected (330 k or 34 k). The receiver enters a low power mode
and optionally it can pass wake-up events to the Serial Communication Interface (SCI). If the
wake-up feature is enabled and if the LIN Bus pin is driven with a dominant level longer than
tWUFR followed by a rising edge, the LIN/HV Physical Layer sends a wake-up pulse to the SCI,
which requests a wake-up interrupt. (This feature is only available if the LIN/HV Physical Layer
is routed to the SCI).
19.1.3 Block Diagram
Figure 19-1 shows the block diagram of the LIN/HV Physical Layer. The module consists of a receiver
with wake-up control, a transmitter with slope and timeout control, a current sensor with overcurrent
protection as well as a registers control block.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
740 Freescale Semiconductor
Figure 19-1. LIN/HV Physical Layer Block Diagram
NOTE
The external 220 pF capacitance between LIN and LGND is strongly
recommended for correct operation.
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Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 741
19.2 External Signal Description
This section lists and describes the signals that connect off chip as well as internal supply nodes and special
signals.
19.2.1 LIN — LIN Bus Pin
This pad is connected to the single-wire LIN data bus.
19.2.2 LGND — LIN Ground Pin
This pin is the device LIN ground connection. It is used to sink currents related to the LIN Bus pin. A de-
coupling capacitor external to the device (typically 220 pF, X7R ceramic) between LIN and LGND can
further improve the quality of this ground and filter noise.
19.2.3 VLINSUP — Positive Power Supply
External power supply to the chip. The VLINSUP supply mapping is described in device level
documentation.
19.2.4 LPTxD — LIN Transmit Pin
This pin can be routed to the SCI, LPDR1 register bit, an external pin, or other options. Please refer to the
PIM chapter of the device specification for the available routing options.
In the HV Phy version, LPTxD can be used to send diagnostic feedback.
This input is only used in normal mode; in other modes the value of this pin is ignored.
19.2.5 LPRxD — LIN Receive Pin
This pin can be routed to the SCI, an external pin, or other options like a timer. Please refer to the PIM
chapter of the device specification for the available routing options.
In the HV Phy version, LPRxD can be used to receive control information since it can be connected to an
internal timer channel.
In standby mode this output is disabled, and sends only a short pulse in case the wake-up functionality is
enabled and a valid wake-up pulse was received in the LIN Bus.
19.3 Memory Map and Register Definition
This section provides a detailed description of all registers accessible in the LIN/HV Physical Layer.
19.3.1 Module Memory Map
A summary of the registers associated with the LIN/HV Physical Layer module is shown in Table 19-2.
Detailed descriptions of the registers and bits are given in the subsections that follow.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
742 Freescale Semiconductor
NOTE
Register Address = Module Base Address + Address Offset, where the
Module Base Address is defined at the MCU level and the Address Offset
is defined at the module level.
Address Offset
Register Name Bit 7654321Bit 0
0x0000
LPDR
R000000
LPDR1 LPDR0
W
0x0001
LPCR
R0000
LPE RXONLY LPWUE LPPUE
W
0x0002
Reserved
RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0003
LPSLRM
RLPDTDIS 00000
LPSLR1 LPSLR0
W
0x0004
Reserved
RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0005
LPSR
RLPDT0000000
W
0x0006
LPIE
RLPDTIE LPOCIE 000000
W
0x0007
LPIF
RLPDTIF LPOCIF 000000
W
Figure 19-2. Register Summary
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 743
19.3.2 Register Descriptions
This section describes all the registers of the LIN/HV Physical Layer and their individual bits.
19.3.2.1 Port LP Data Register (LPDR)
Table 19-2. LPDR Field Description
Module Base + Address 0x0000 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R000000
LPDR1 LPDR0
W
Reset00000011
= Unimplemented
Figure 19-3. Port LP Data Register (LPDR)
Field Description
1
LPDR1
Port LP Data Bit 1 The LPTxD input of the LIN/HV Physical Layer (see Figure 19-1) can be directly controlled
by this register bit. The routing of the LPTxD input is done in the Port Inetrgation Module (PIM). Please refer to
the device PIM description for more info.In the HV Phy version, this bit can be use to send diagnostic feedback.
0
LPDR0
Port LP Data Bit 0 — Read-only bit. The LIN Physical Layer LPRxD output state can be read at any time.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
744 Freescale Semiconductor
19.3.2.2 LIN Control Register (LPCR)
Table 19-3. LPCR Field Description
Module Base + Address 0x0001 Access: User read/write(1)
1. Read: Anytime
Write: Anytime,
76543210
R0 0 0 0 LPE RXONLY LPWUE LPPUE
W
Reset00000000
= Unimplemented
Figure 19-4. LIN Control Register (LPCR)
Field Description
3
LPE
LIN Enable Bit — If set, this bit enables the LIN Physical Layer.
0 The LIN Physical Layer is in shutdown mode. None of the LIN Physical Layer functions are available, except
that the bus line is held in its recessive state by a high ohmic (330k) resistor. All registers are normally
accessible.
1 The LIN Physical Layer is not in shutdown mode.
2
RXONLY
Receive Only Mode bit — This bit controls RXONLY mode.
0 The LIN Physical Layer is not in receive only mode.
1 The LIN Physical Layer is in receive only mode.
1
LPWUE
LIN Wake-Up Enable — This bit controls the wake-up feature in standby mode.
0 In standby mode the wake-up feature is disabled.
1 In standby mode the wake-up feature is enabled.
0
LPPUE
LIN Pullup Resistor Enable — Selects pullup resistor.
0 The pullup resistor is high ohmic (330 k).
1 The 34 kpullup is switched on (except if LPE=0 or when in standby mode with LPWUE=0)
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 745
19.3.2.3 Reserved Register
NOTE
This reserved register is designed for factory test purposes only, and is not
intended for general user access. Writing to this register when in special
mode can alter the module’s functionality.
19.3.2.4 LIN Slew Rate Mode Register (LPSLRM)
Module Base + Address 0x0002 Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode
76543210
RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
= Unimplemented
Figure 19-5. LIN Test register
Table 19-4. Reserved Register Field Description
Field Description
7-0
Reserved
These reserved bits are used for test purposes. Writing to these bits can alter the module functionality.
Module Base + Address 0x0003 Access: User read/write(1)
1. Read: Anytime
Write: Only in shutdown mode (LPE=0)
76543210
RLPDTDIS 00000
LPSLR1 LPSLR0
W
Reset00000000
= Unimplemented
Figure 19-6. LIN Slew Rate Mode Register (LPSLRM)
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
746 Freescale Semiconductor
Table 19-5. LPSLRM Field Description
19.3.2.5 Reserved Register
NOTE
This reserved register is designed for factory test purposes only, and is not
intended for general user access. Writing to this register when in special
mode can alter the module’s functionality.
Table 19-6. Reserved Register Field Description
Field Description
7
LPDTDIS
TxD-dominant timeout disable Bit This bit disables the TxD-dominant timeout feature. Disabling this feature
is only recommended for using the LIN Physical Layer for other applications than LIN protocol. It is only writable
in shutdown mode (LPE=0).
0 TxD-dominant timeout feature is enabled.
1 TxD-dominant timeout feature is disabled.
1-0
LPSLR[1:0]
Slew-Rate Bits Please see section 19.4.2 for details on how the slew rate control works. These bits are only
writable in shutdown mode (LPE=0).
00 Normal Slew Rate (optimized for 20 kbit/s).
01 Slow Slew Rate (optimized for 10.4 kbit/s).
10 Fast Mode Slew Rate (up to 250 kbit/s). This mode is not compliant with the LIN Protocol (LIN electrical
characteristics like duty cycles, reference levels, etc. are not fulfilled). It is only meant to be used for fast data
transmission. Please refer to section 19.4.2.2 for more details on fast mode.Please note that an external
pullup resistor stronger than 1 k might be necessary for the range 100 kbit/s to 250 kbit/s.
11 Reserved .
Module Base + Address 0x0004 Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode
76543210
RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
= Unimplemented
Figure 19-7. Reserved Register
Field Description
7-0
Reserved
These reserved bits are used for test purposes. Writing to these bits can alter the module functionality.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 747
19.3.2.6 LIN Status Register (LPSR)
19.3.2.7 LIN Interrupt Enable Register (LPIE)
Module Base + Address 0x0005 Access: User read/write(1)
1. Read: Anytime
Write: Never, writes to this register have no effect
76543210
RLPDT 0 0 0 0 0 0 0
W
Reset00000000
= Unimplemented
Figure 19-8. LIN Status Register (LPSR)
Table 19-7. LPSR Field Description
Field Description
7
LPDT
LIN Transmitter TxD-dominant timeout Status Bit — This read-only bit signals that the LPTxD pin is still
dominant after a TxD-dominant timeout. As long as the LPTxD is dominant after the timeout the LIN transmitter
is shut down and the LPTDIF is set again after attempting to clear it.
0 If there was a TxD-dominant timeout, LPTxD has ceased to be dominant after the timeout.
1 LPTxD is still dominant after a TxD-dominant timeout.
Module Base + Address 0x0006 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
RLPDTIE LPOCIE 000000
W
Reset00000000
= Unimplemented
Figure 19-9. LIN Interrupt Enable Register (LPIE)
Table 19-8. LPIE Field Description
Field Description
7
LPDTIE
LIN transmitter TxD-dominant timeout Interrupt Enable
0 Interrupt request is disabled.
1 Interrupt is requested if LPDTIF bit is set.
6
LPOCIE
LIN transmitter Overcurrent Interrupt Enable
0 Interrupt request is disabled.
1 Interrupt is requested if LPOCIF bit is set.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
748 Freescale Semiconductor
19.3.2.8 LIN Interrupt Flags Register (LPIF)
Table 19-9. LPIF Field Description
Module Base + Address 0x0007 Access: User read/write(1)
1. Read: Anytime
Write: Writing ‘1’ clears the flags, writing a ‘0’ has no effect
76543210
RLPDTIF LPOCIF 000000
W
Reset00000000
= Unimplemented
Figure 19-10. LIN Interrupt Flags Register (LPIF)
Field Description
7
LPDTIF
LIN Transmitter TxD-dominant timeout Interrupt Flag LPDTIF is set to 1 when LPTxD is still dominant (0)
after tTDLIM of the falling edge of LPTxD. For protection, the transmitter is disabled. This flag can only be
cleared by writing a 1. Writing a 0 has no effect. Please make sure that LPDTIF=1 before trying to clear it.
Clearing LPDTIF is not allowed if LPDTIF=0 already. If the LPTxD is still dominant after clearing the flag, the
transmitter stays disabled and this flag is set again (see 19.4.4.2 TxD-dominant timeout Interrupt).
If interrupt requests are enabled (LPDTIE= 1), LPDTIF causes an interrupt request.
0 No TxD-dominant timeout has occurred.
1 A TxD-dominant timeout has occurred.
6
LPOCIF
LIN Transmitter Overcurrent Interrupt Flag — LPOCIF is set to 1 when an overcurrent event happens. For
protection, the transmitter is disabled. This flag can only be cleared by writing a 1. Writing a 0 has no effect.
Please make sure that LPOCIF=1 before trying to clear it. Clearing LPOCIF is not allowed if LPOCIF=0 already.
If the overcurrent is still present or LPTxD is dominant after clearing the flag, the transmitter stays disabled and
this flag is set again (see19.4.4.1 Overcurrent Interrupt).
If interrupt requests are enabled (LPOCIE= 1), LPOCIF causes an interrupt request.
0 No overcurrent event has occurred.
1 Overcurrent event has occurred.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 749
19.4 Functional Description
19.4.1 General
The LIN/HV Physical Layer module implements the physical layer of the LIN/HV interface. In the LIN
version, this physical layer can be driven by the SCI (Serial Communication Interface) module or directly
through the LPDR register.In the HV Phy version, the input can be routed to an internal timer to measure
the frequency and duty cycle of the PWM input signal. If required, the output can directly be controlled
by the LPDR register, e.g. to send diagnostic feedback.
19.4.2 Slew Rate and LIN Mode Selection
The slew rate can be selected for Electromagnetic Compatibility (EMC) optimized operation at 10.4 kbit/s
and 20 kbit/s as well as at fast baud rate (up to 250 kbit/s) for test and programming. The slew rate can be
chosen with the bits LPSLR[1:0] in the LIN Slew Rate Mode Register (LPSLRM). The default slew rate
corresponds to 20 kbit/s.
In the HV Phy version, the TxD-dominant timeout must be disabled (LPDTDIS=1) in order e.g. to transmit
a PWM pulse.
Changing the slew rate (LPSLRM Register) during transmission is not allowed in order to avoid unwanted
effects. To change the register, the LIN/HV Physical Layer must first be disabled (LPE=0). Once it is
updated, the LIN/HV Physical Layer can be enabled again.
NOTE
For 20 kbit/s and Fast Mode communication speeds, the corresponding slew
rate MUST be set; otherwise, the communication is not guaranteed
(violation of the specified LIN duty cycles). For 10.4 kbit/s, the 20 kbit/s
slew rate can be set but the EMC performance is worse. The up to 250 kbit/s
slew rate must be chosen ONLY for fast mode, not for any of the 10.4 kbit/s
or 20 kbit/s LIN compliant communication speeds.
19.4.2.1 10.4 kbit/s and 20 kbit/s
When the slew rate is chosen for 10.4 kbit/s or 20 kbit/s communication, a control loop is activated within
the module to make the rise and fall times of the LIN bus independent from VLINSUP and the load on the
bus.
19.4.2.2 Fast Mode (not LIN compliant)
Choosing this slew rate allows baud rates up to 250 kbit/s by having much steeper edges (please refer to
electricals). As for the 10.4 kbit/s and 20 kbit/s modes, the slope control loop is also engaged. This mode
is used for fast communication only, and the LIN electricals are not supported (for example, the LIN duty
cycles).
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
750 Freescale Semiconductor
A stronger external pullup resistor might be necessary to sustain communication speeds up to
250 kbit/s. The signal on the LIN pin and the LPRxD signal might not b e symmetrical for high baud rates
with high loads on the bus.
Please note that if the bit time is smaller than the parameter tOCLIM (please refer to electricals), then no
overcurrent is reported nor does an overcurrent shutdown occur. However , the current limitation is always
engaged in case of a failure.
19.4.3 Modes
Figure 19-11 shows the possible mode transitions depending on control bits, stop mode, and error
conditions.
19.4.3.1 Shutdown Mode
The LIN/HV Physical Layer is fully disabled. No wake-up functionality is available. The internal pullup
resistor is high ohmic only (330 k) to maintain the LIN pin in the recessive state. LPTxD is not monitored
in this mode for a TxD-dominant timeout. All the registers are accessible.
Setting LPE causes the module to leave the shutdown mode and to enter the normal mode or receive only
mode (if RXONLY bit is set).
Clearing LPE causes the module to leave the normal or receive only modes and go back to shutdown mode.
19.4.3.2 Normal Mode
The full functionality is available. Both receiver and transmitter are enabled. The internal pullup resistor
can be chosen to be high ohmic (330 k) if LPPUE = 0, or LIN compliant (34 k if LPPUE = 1.
If RXONLY is set, the module leaves normal mode to enter receive only mode.
If the MCU enters stop mode, the LIN/HV Physical Layer enters standby mode.
19.4.3.3 Receive Only Mode
Entering this mode disables the transmitter and immediately stops any on-going transmission. LPTxD is
not monitored in this mode for a TxD-dominant timeout.
The receiver is running in full performance mode in all cases.
To return to normal mode, the RXONLY bit must be cleared.
If the device enters stop mode, the module leaves receive only mode to enter standby mode.
19.4.3.4 Standby Mode with Wake-Up Feature
The transmitter of the LIN/HV Physical Layer is disabled and the receiver enters a low power mode.
NOTE
Before entering standby mode, please ensure that no transmission is
ongoing.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 751
If LPWUE is not set, no wake up feature is available and the standby mode has the same electrical
properties as the shutdown mode. This allows a low-power consumption of the device in stop mode if the
wake-up feature is not needed.
If LPWUE is set, th e receiver is able to pass wake-up events to the SCI (Serial Communication Interface).
If the LIN/HV Physical Layer receives a dominant level longer than tWUFR followed by a rising edge, it
sends a pulse to the SCI which can generate a wake-up interrupt.
Once the device exits stop mode, the LIN/HV Physical Layer returns to normal or receive only mode
depending on the status of the RXONLY bit.
NOTE
Since the wake-up interrupt is requested by the SCI, the wake-up feature is
not available if LPRxD is not connected to the SCI..
The internal pullup resistor is selectable only if LPWUE = 1 (wake-up enabled). If LPWUE = 0, the
internal pullup resistor is not selectable and remains at 330 k regardless of the state of the LPPUE bit.
If LPWUE = 1, selecting the 330 k pullup resistor (LPPUE = 0) reduces the current consumption in
standby mode.
NOTE
The use of the LIN wake-up feature in combination with other non-LIN
device wake-up features (like a periodic time interrupt) must be handled
with care.
If the device leaves stop mode while the LIN bus is dominant, the LIN/HV
Physical Layer returns to normal or receive only mode and the LPRxD
signal is re-routed to the RxD pin of the SCI and triggers the edge detection
interrupt (if the interrupt’s priority of the hardware that awakes the MCU is
less than the priority of the SCI interrupt, then the SCI interrupt will execute
first). It is up to the software to decide what to do in this case because the
LIN/HV Physical Layer may not determine whether it was a valid wake-up
pulse.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
752 Freescale Semiconductor
Figure 19-11. LIN/HV Physical Layer Mode Transitions
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Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 753
19.4.4 Interrupts
The interrupt vector requested by the LIN/HV Physical Layer is listed in Table 19-10. Vector address and
interrupt priority is defined at the MCU level.
The module internal interrupt sources are combined into a single interrupt request at the device level.
19.4.4.1 Overcurrent Interrupt
The transmitter is protected against overcurrent. In case of an overcurrent condition occurring within a
time frame called tOCLIM starting from LPTxD falling edge, the current through the transmitter is limited
(the transmitter is not shut down). The masking of an overcurrent event within the time frame tOCLIM is
meant to avoid “false” overcurrent conditions that can happen during the dischar ging of the LIN bus. If an
overcurrent event occurs out of this time frame, the transmitter is disabled and the LPOCIF flag is set.
In order to re-enable the transmitter again, the following prerequisites must be met:
1) Overcurrent condition is over
2) LPTxD is recessive or the LIN/HV Physical Layer is in shutdown or receive only mode for a
minimum of a transmit bit time.
To re-enable the transmitter then, the LPOCIF flag must be cleared (by writing a 1).
NOTE
Please make sure that LPOCIF=1 before trying to clear it. It is not allowed
to try to clear LPOCIF if LPOCIF=0 already.
After clearing LPOCIF, if the overcurrent condition is still present or the LPTxD pin is dominant while
being in normal mode, the transmitter remains disabled and the LPOCIF flag is set again after a time to
indicate that the attempt to re-enable has failed. This time is equal to:
minimum 1 IRC period (1 us) + 2 bus periods
maximum 2 IRC periods (2 us) + 3 bus periods
If the bit LPOCIE is set in the LPIE register, an interrupt is requested.
Figure 19-12 shows the different scenarios for overcurrent interrupt handling.
Table 19-10. Interrupt Vectors
Module Interrupt Source Module Internal Interrupt
Source Local Enable
LIN Interrupt (LPI) LIN Txd-Dominant Timeout
Interrupt (LPDTIF)
LPDTIE = 1
LIN Overcurrent Interrupt
(LPOCIF)
LPOCIE = 1
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
754 Freescale Semiconductor
Figure 19-12. Overcurrent interrupt handling
19.4.4.2 TxD-dominant timeout Interrupt
NOTE
In order to perform PWM communication, the TxD-dominant timeout
feature must be disabled.
To protect the LIN bus from a network lock-up, the LIN Physical Layer implements a TxD-dominant
timeout mechanism. When the LPTxD signal has been dominant for more than tDTLIM the transmitter is
disabled and the LPDT status flag and the LPDTIF interrupt flag are set.
In order to re-enable the transmitter again, the following prerequisites must be met:
1) TxD-dominant condition is over (LPDT=0)
2) LPTxD is recessive or the LIN Physical Layer is in shutdown or receive only mode for a
minimum of a transmit bit time
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Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 755
To re-enable the transmitter then, the LPDTIF flag must be cleared (by writing a 1).
NOTE
Please make sure that LPDTIF=1 before trying to clear it. It is not allowed
to try to clear LPDTIF if LPDTIF=0 already.
After clearing LPDTIF, if the TxD-dominant timeout condition is still present or the LPTxD pin is
dominant while being in normal mode, the transmitter remains disabled and the LPDTIF flag is set after a
time again to indicate that the attempt to re-enable has failed. This time is equal to:
minimum 1 IRC period (1 us) + 2 bus periods
maximum 2 IRC periods (2 us) + 3 bus periods
If the bit LPDTIE is set in the LPIE register, an interrupt is requested.
Figure 19-13 shows the different scenarios of TxD-dominant timeout interrupt handling.
Figure 19-13. TxD-dominant timeout interrupt handling
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Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
756 Freescale Semiconductor
19.5 Application Information
19.5.1 Module Initialization
The following steps should be used to configure the module before starting the transmission:
In the LIN version, set the slew rate in the LPSLRM register to the desired transmission baud rate.
In the HV Phy version, de-activate the dominant timeout feature in the LPSLRM register if needed.
In most cases, the internal pullup should be enabled in the LPCR register.
Perform the correct routing settings in the PIM module:
In the LIN version, select the SCI as source, i.e. connect the TxD pin of the SCI to LPTxD, and
the RxD pin of the SCI to LPRxD.
In the HV Phy version, connect LPRxD to the internal timer (control information) and if
required, connect the LPDR1 bit of the LPDR register to LPTxD (diagnostic feedback). If the
wake-up feature is required, the RxD pin of the SCI must also be connected to LPRxD.
Select the transmit mode (Receive only mode or Normal mode) in the LPCR register.
If the RxD pin of the SCI is connected to LPRxD, activate the wake-up feature in the LPCR register
if needed for the application (SCI active edge interrupt must also be enabled).
Enable the LIN/HV Physical Layer in the LPCR register.
Wait for a minimum of a transmit bit.
Begin transmission if needed.
NOTE
It is not allowed to try to clear LPOCIF or LPDTIF if they are already
cleared. Before trying to clear an error flag, always make sure that it is
already set.
19.5.2 Interrupt handling in Interrupt Service Routine (ISR)
Both interrupts (TxD-dominant timeout and overcurrent) represent a failure in transmission. To avoid
more disturbances on the transmission line, the transmitter is de-activated in both cases. The interrupt
subroutine must take care of clearing the error condition and starting the routine that re-enables the
transmission. For that purpose, the following steps are recommended:
1. First, the cause of the interrupt must be cleared:
The overcurrent will be gone after the transmitter has been disabled.
The TxD-dominant timeout condition will be gone once the selected source for LPTxD has
turned recessive.
2. Clear the corresponding enable bit (LPDTIE or LPOCIE) to avoid entering the ISR again until the
flags are cleared.
3. Notify the application of the error condition (LIN Error handler) and leave the ISR.
In the LIN Error handler, the following sequence is recommended:
1. Disable the LIN/HV Physical Layer (LPCR) while re-configuring the transmission.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 757
If the receiver must remain enabled, set the LIN/HV Physical Layer into receive only mode
instead.
2. Do all required configurations (SCI, etc.) to re-enable the transmission.
3. Wait for a transmit bit (this is needed to successfully re-enable the transmitter).
4. Clear the error flag.
5. Enable the interrupts again (LPDTIE and LPOCIE).
6. Enable the LIN/HV Physical Layer or leave the receive only mode (LPCR register).
7. Wait for a minimum of a transmit bit before beginning transmission again.
If there is a problem re-enabling the transmitte r, then the error f lag will be set again during step 3 and the
ISR will be called again.
Chapter 19 LIN/HV Physical Layer (S12LINPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
758 Freescale Semiconductor
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 759
Chapter 20
Flash Module (S12ZFTMRZ)
20.1 Introduction
The P-Flash (Program Flash) and EEPROM memory sizes are specified at device level (Reference Manual
device overview chapter). The description in the following sections is valid for all P-Flash and EEPROM
memory sizes.
The Flash memory is ideal for single-supply applications allowing for field reprogramming without
requiring external high voltage sources for program or erase operations. The Flash module includes a
memory controller that executes commands to modify Flash memory contents. The user interface to the
memory controller consists of the indexed Flash Common Command Object (FCCOB) register which is
written to with the command, global address, data, and any required command parameters. The memory
controller must complete the execution of a command before the FCCOB register can be written to with a
new command.
CAUTION
A Flash word or phrase must be in the erased state before being
programmed. Cumulative programming of bits within a Flash word or
phrase is not allowed.
The Flash memory may be read as bytes and aligned words. Read access time is one bus cycle for bytes
and aligned words. For misaligned words access, the CPU has to perform twice the byte read access
command. For Flash memory, an erased bit reads 1 and a programmed bit reads 0.
Table 20-1. Revision History
Revision
Number
Revision
Date
Sections
Affected Description of Changes
V02.03 12 Apr 2012 20.3 Corrected many typo.
Changed caution note
V02.04 17 May 2012 20.3.2.6 - Removed flag DFDIE
V02.05 11 Jul 2012 - Added explanation about when MGSTAT[1:0] bits are cleared,
Section 20.3.2.7
- Added note about possibility of reading P-Flash and EEPROM
simultaneously, Section 20.4.6
V02.06 18 Mar 2013 - Standardized nomenclature in references to memory sizes
V02.07 24 May 2013 - Revised references to NVM Resource Area to improve readability
V02.8 12 Jun 2013 - Changed MLOADU Section 20.4.7.12 and MLOADF Section 20.4.7.13
FCCOB1 to FCCOB2
V02.9 15 Oct 2014 Created memory-size independent version of this module description
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 760
It is possible to read from P-Flash memory while some commands are executing on EEPROM memory. It
is not possible to read from EEPROM memory while a command is executing on P-Flash memory from
the same block. Simultaneous P-Flash and EEPROM operations are discussed in Section 20.4.6.
Both P-Flash and EEPROM memories are implemented with Error Correction Codes (ECC) that can
resolve single bit faults and detect double bit faults. For P-Flash memory, the ECC implementation
requires that programming be done on an aligned 8 byte basis (a Flash phrase). Since P-Flash memory is
always read by half-phrase, only one single bit fault in an aligned 4 byte half-phrase containing the byte
or word accessed will be corrected.
20.1.1 Glossary
Command Write Sequence — An MCU instruction sequence to execute built-in algorithms (including
program and erase) on the Flash memory.
EEPROM Memory — The EEPROM memory constitutes the nonvolatile memory store for data.
EEPROM Sector — The EEPROM sector is the smallest portion of the EEPROM memory that can be
erased. The EEPROM sector consists of 4 bytes.
NVM Command Mode — An NVM mode using the CPU to setup the FCCOB register to pass parameters
required for Flash command execution.
Phrase — An aligned group of four 16-bit words within the P-Flash memory. Each phrase includes two
sets of aligned double words with each set including 7 ECC bits for single bit fault correction and double
bit fault detection within each double word.
P-Flash Memory — The P-Flash memory constitutes the main nonvolatile memory store for applications.
P-Flash Sector — The P-Flash sector is the smallest portion of the P-Flash memory that can be erased.
Each P-Flash sector contains 512 bytes.
Program IFR — Nonvolatile information register located in the P-Flash block that contains the Version
ID, and the Program Once field.
20.1.2 Features
20.1.2.1 P-Flash Features
Derivatives featuring up to and including 128 KB of P-Flash include one P-Flash block
Derivatives featuring more than 128 KB of P-Flash include two Flash blocks
In each case the P-Flash sector size is 512 bytes
Single bit fault correction and double bit fault detection within a 32-bit double word during read
operations
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 761
Automated program and erase algorithm with verify and generation of ECC parity bits
Fast sector erase and phrase program operation
Ability to read the P-Flash memory while programming a word in the EEPROM memory
Flexible protection scheme to prevent accidental program or erase of P-Flash memory
20.1.2.2 EEPROM Features
The EEPROM memory is composed of one Flash block divided into sectors of 4 bytes
Single bit fault correction and double bit fault detection within a word during read operations
Automated program and erase algorithm with verify and generation of ECC parity bits
Fast sector erase and word program operation
Protection scheme to prevent accidental program or erase of EEPROM memory
Ability to program up to four words in a burst sequence
20.1.2.3 Other Flash Module Features
No external high-voltage power supply required for Flash memory program and erase operations
Interrupt generation on Flash command completion and Flash error detection
Security mechanism to prevent unauthorized access to the Flash memory
20.1.3 Block Diagram
The block diagrams of the Flash modules are shown in the following figures.
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
762 Freescale Semiconductor
Figure 20-1. FTMRZ Block Diagram (Single P-Flash Block plus EEPROM block)
sector 0
sector 1
final sector
Bus Clock
Divider
Clock
Command
Interrupt
Request
FCLK
Protection
Security
Registers
Flash
Interface
16bit
internal
bus P-Flash
Error
Interrupt
Request
CPU
sector 0
sector 1
final sector
EEPROM
Memory
Controller
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 763
Table 20-2. FTMRZ Block Diagram (Two P-Flash blocks plus EEPROM block)
20.2 External Signal Description
The Flash module contains no signals that connect off-chip.
sector 0
sector 1
final sector
Bus Clock
Divider
Clock
Command
Interrupt
Request
FCLK
Protection
Security
Registers
Flash
Interface
16bit
internal
bus P-Flash
Error
Interrupt
Request
CPU
sector 0
sector 1
final sector
EEPROM
Memory
Controller
sector 0
sector 1
final sector
P-Flash
HardBlock-0S
HardBlock-0N (P-Flash+EEPROM)
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
764 Freescale Semiconductor
20.3 Memory Map and Registers
This section describes the memory map and registers for the Flash module. Read data from unimplemented
memory space in the Flash module is undefined. Write access to unimplemented or reserved memory space
in the Flash module will be ignored by the Flash module.
CAUTION
Writing to the Flash registers while a Flash command is executing (that is
indicated when the value of flag CCIF reads as ’0’) is not allowed. If such
action is attempted, the result of the write operation will be unpredictable.
Writing to the Flash registers is allowed when the Flash is not busy
executing commands (CCIF = 1) and during initialization right after reset,
despite the value of flag CCIF in that case (refer to Section 20.6 for a
complete description of the reset sequence).
.
20.3.1 Module Memory Map
The P-Flash memory is located between global addresses 0x80_0000 and 0xFF_FFFF. The P-Flash is high
aligned from 0xFF_FFFF. Thus, for example, a 128 KB P-Flash extends from 0xFF_FFFF to 0xFE_0000.
The flash configuration field is mapped to the same addresses independent of the P-Flash memory size, as
shown in Figure 20-2.
The FPROT register , described in Section 20.3.2.9, can be set to protect regions in the Flash memory from
accidental program or erase. Three separate memory regions, one growing upward from global address
0xFF_8000 in the Flash memory (called the lower region), one growing downward from global address
0xFF_FFFF in the Flash memory (called the higher region), and the remaining addresses in the Flash
memory, can be activated for protection. The Flash memory addresses covered by these protectable
regions are shown in the P-Flash memory map. The higher address region is mainly targeted to hold the
boot loader code since it covers the vector space. Default protection settings as well as security information
that allows the MCU to restrict access to the Flash module are stored in the Flash configuration field as
described in Table 20-4.
Table 20-3. FTMRZ Memory Map
Global Address (in Bytes) Description
0x0_0000 – 0x0_0FFF Register Space
0x10_0000 – 0x1F_4000 EEPROM memory range. Allocation is device dependent.
0x1F_4000 – 0x1F_FFFF NVM Resource Area(1) (see Figure 20-3)
1. See NVM Resource area description in Section 20.4.4
0x80_0000 – 0xFD_FFFF P-Flash memory range (Hardblock 0S). Allocation is device dependent.
0xFE_0000 – 0xFF_FFFF P-Flash memory range (Hardblock 0N). Allocation is device dependent.
Chapter 20 Flash Module (S12ZFTMRZ)
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Table 20-4. Flash Configuration Field
Global Address Size
(Bytes) Description
0xFF_FE00-0xFF_FE07 8
Backdoor Comparison Key
Refer to Section 20.4.7.11, “Verify Backdoor Access Key Command,” and
Section 20.5.1, “Unsecuring the MCU using Backdoor Key Access
0xFF_FE08-0xFF_FE0912Protection Override Comparison Key. Refer to Section 20.4.7.17, “Protection
Override Command
0xFF_FE0A-
0xFF_FE0B(1)
1. 0xFF_FE08-0xFF_FE0F form a Flash phrase and must be programmed in a single command write sequence. Each byte
in the 0xFF_FE0A - 0xFF_FE0B reserved field should be programmed to 0xFF.
2Reserved
0xFF_FE0C11P-Flash Protection byte.
Refer to Section 20.3.2.9, “P-Flash Protection Register (FPROT)”
0xFF_FE0D11EEPROM Protection byte.
Refer to Section 20.3.2.10, “EEPROM Protection Register (DFPROT)”
0xFF_FE0E11Flash Nonvolatile byte
Refer to Section 20.3.2.11, “Flash Option Register (FOPT)”
0xFF_FE0F11Flash Security byte
Refer to Section 20.3.2.2, “Flash Security Register (FSEC)”
Chapter 20 Flash Module (S12ZFTMRZ)
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Figure 20-2. P-Flash Memory Map With Protection Alignment
Flash Configuration Field
0xFF_C000
Flash Protected/Unprotected Lower Region
1, 2, 4, 8 KB
0xFF_8000
0xFF_9000
0xFF_8400
0xFF_8800
0xFF_A000
P-Flash END = 0xFF_FFFF
0xFF_F800
0xFF_F000
0xFF_E000 Flash Protected/Unprotected Higher Region
2, 4, 8, 16 KB
Flash Protected/Unprotected Region
8 KB (up to 29 KB)
16 bytes (0xFF_FE00 - 0xFF_FE0F)
Flash Protected/Unprotected Region
Size is device dependent
P-Flash START
Protection
Protection
Protection
Movable End
Fixed End
Fixed End
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Table 20-5. Program IFR Fields
Global Address Size
(Bytes) Field Description
0x1F_C000 – 0x1F_C007 8 Reserved
0x1F_C008 – 0x1F_C0B5 174 Reserved
0x1F_C0B6 – 0x1F_C0B7 2 Version ID(1)
1. Used to track firmware patch versions, see Section 20.4.2
0x1F_C0B8 – 0x1F_C0BF 8 Reserved
0x1F_C0C0 – 0x1F_C0FF 64 Program Once Field
Refer to Section 20.4.7.6, “Program Once Command
Table 20-6. Memory Controller Resource Fields (NVM Resource Area(1))
1. See Section 20.4.4 for NVM Resources Area description.
Global Address Size
(Bytes) Description
0x1F_4000 – 0x1F_41FF 512 Reserved
0x1F_4200 – 0x1F_7FFF 15,872 Reserved
0x1F_8000 – 0x1F_97FF 6,144 Reserved
0x1F_9800 – 0x1F_BFFF 10,240 Reserved
0x1F_C000 0x1F_C0FF 256 P-Flash IFR (see Table 20-5)
0x1F_C100 – 0x1F_C1FF 256 Reserved.
0x1F_C200 – 0x1F_FFFF 15,872 Reserved.
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Figure 20-3. Memory Controller Resource Memory Map (NVM Resources Area)
20.3.2 Register Descriptions
The Flash module contains a set of 24 control and status registers located between Flash module base +
0x0000 and 0x0017.
In the case of the writable registers, the write accesses are forbidden during Flash command execution (for
more detail, see Caution note in Section 20.3).
A summary of the Flash module registers is given in Figure 20-4 with detailed descriptions in the
following subsections.
Address
& Name 76543210
0x0000
FCLKDIV
RFDIVLD FDIVLCK FDIV5 FDIV4 FDIV3 FDIV2 FDIV1 FDIV0
W
0x0001
FSEC
R KEYEN1 KEYEN0 RNV5 RNV4 RNV3 RNV2 SEC1 SEC0
W
0x0002
FCCOBIX
R0 0 0 0 0 CCOBIX2 CCOBIX1 CCOBIX0
W
Figure 20-4. FTMRZ128K512 Register Summary
P-Flash IFR 256 bytes
0x1F_C000
0x1F_41FF
0x1F_4000
Reserved 6 KB
Reserved 15872 bytes
0x1F_8000
0x1F_97FF
0x1F_C100 Reserved 16,128 bytes
Reserved 512 bytes
Reserved 10 KB
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0x0003
FPSTAT
RFPOVRD000000WSTATACK
W
0x0004
FCNFG
RCCIE 0 ERSAREQ IGNSF WSTAT[1:0] FDFD FSFD
W
0x0005
FERCNFG
R0000000
SFDIE
W
0x0006
FSTAT
RCCIF 0ACCERR FPVIOL MGBUSY RSVD MGSTAT1 MGSTAT0
W
0x0007
FERSTAT
R000000
DFDF SFDIF
W
0x0008
FPROT
RFPOPEN RNV6 FPHDIS FPHS1 FPHS0 FPLDIS FPLS1 FPLS0
W
0x0009
DFPROT(1)
RDPOPEN DPS6 DPS5 DPS4 DPS3 DPS2 DPS1 DPS0
W
0x000A
FOPT
R NV7 NV6 NV5 NV4 NV3 NV2 NV1 NV0
W
0x000B
FRSV1
R00000000
W
0x000C
FCCOB0HI
RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x000D
FCCOB0LO
RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x000E
FCCOB1HI
RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x000F
FCCOB1LO
RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x0010
FCCOB2HI
RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
Address
& Name 76543210
Figure 20-4. FTMRZ128K512 Register Summary (continued)
Chapter 20 Flash Module (S12ZFTMRZ)
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20.3.2.1 Flash Clock Divider Register (FCLKDIV)
The FCLKDIV register is used to control timed events in program and erase algorithms.
All bits in the FCLKDIV register are readable, bit 7 is not writable, bit 6 is write-once-hi and controls the
writability of the FDIV field in normal mode. In special mode, bits 6-0 are writable any number of times
but bit 7 remains unwritable.
0x0011
FCCOB2LO
RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x0012
FCCOB3HI
RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x0013
FCCOB3LO
RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x0014
FCCOB4HI
RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x0015
FCCOB4LO
RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x0016
FCCOB5HI
RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x0017
FCCOB5LO
RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
= Unimplemented or Reserved
1. Number of implemented DPS bits depends on EEPROM memory size.
Offset Module Base + 0x0000
76543210
RFDIVLD FDIVLCK FDIV[5:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 20-5. Flash Clock Divider Register (FCLKDIV)
Address
& Name 76543210
Figure 20-4. FTMRZ128K512 Register Summary (continued)
Chapter 20 Flash Module (S12ZFTMRZ)
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CAUTION
The FCLKDIV register should never be written while a Flash command is
executing (CCIF=0).
Table 20-7. FCLKDIV Field Descriptions
Field Description
7
FDIVLD
Clock Divider Loaded
0 FCLKDIV register has not been written since the last reset
1 FCLKDIV register has been written since the last reset
6
FDIVLCK
Clock Divider Locked
0 FDIV field is open for writing
1 FDIV value is locked and cannot be changed. Once the lock bit is set high, only reset can clear this bit and
restore writability to the FDIV field in normal mode.
5–0
FDIV[5:0]
Clock Divider Bits FDIV[5:0] must be set to effectively divide BUSCLK down to 1 MHz to control timed events
during Flash program and erase algorithms. Tab le 20 -8 shows recommended values for FDIV[5:0] based on the
BUSCLK frequency. Please refer to Section 20.4.5, “Flash Command Operations, for more information.
Table 20-8. FDIV values for various BUSCLK Frequencies
BUSCLK Frequency
(MHz) FDIV[5:0]
BUSCLK Frequency
(MHz) FDIV[5:0]
MIN(1) MAX(2) MIN1MAX2
1.0 1.6 0x00 26.6 27.6 0x1A
1.6 2.6 0x01 27.6 28.6 0x1B
2.6 3.6 0x02 28.6 29.6 0x1C
3.6 4.6 0x03 29.6 30.6 0x1D
4.6 5.6 0x04 30.6 31.6 0x1E
5.6 6.6 0x05 31.6 32.6 0x1F
6.6 7.6 0x06 32.6 33.6 0x20
7.6 8.6 0x07 33.6 34.6 0x21
8.6 9.6 0x08 34.6 35.6 0x22
9.6 10.6 0x09 35.6 36.6 0x23
10.6 11.6 0x0A 36.6 37.6 0x24
11.6 12.6 0x0B 37.6 38.6 0x25
12.6 13.6 0x0C 38.6 39.6 0x26
13.6 14.6 0x0D 39.6 40.6 0x27
14.6 15.6 0x0E 40.6 41.6 0x28
15.6 16.6 0x0F 41.6 42.6 0x29
16.6 17.6 0x10 42.6 43.6 0x2A
17.6 18.6 0x11 43.6 44.6 0x2B
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20.3.2.2 Flash Security Register (FSEC)
The FSEC register holds all bits associated with the security of the MCU and Flash module.
All bits in the FSEC register are readable but not writable.
During the reset sequence, the FSEC register is loaded with the contents of the Flash security byte in the
Flash configuration field at global address 0xFF_FE0F located in P-Flash memory (see Table 20-4) as
indicated by reset condition F in Figure 20-6. If a double bit fault is detected while reading the P-Flash
phrase containing the Flash security byte during the reset sequence, all bits in the FSEC register will be set
to leave the Flash module in a secured state with backdoor key access disabled.
18.6 19.6 0x12 44.6 45.6 0x2C
19.6 20.6 0x13 45.6 46.6 0x2D
20.6 21.6 0x14 46.6 47.6 0x2E
21.6 22.6 0x15 47.6 48.6 0x2F
22.6 23.6 0x16 48.6 49.6 0x30
23.6 24.6 0x17 49.6 50.6 0x31
24.6 25.6 0x18
25.6 26.6 0x19
1. BUSCLK is Greater Than this value.
2. BUSCLK is Less Than or Equal to this value.
Offset Module Base + 0x0001
76543210
R KEYEN[1:0] RNV[5:2] SEC[1:0]
W
Reset F(1)
1. Loaded from Flash configuration field, during reset sequence.
F1F1F1F1F1F1F1
= Unimplemented or Reserved
Figure 20-6. Flash Security Register (FSEC)
Table 20-8. FDIV values for various BUSCLK Frequencies
BUSCLK Frequency
(MHz) FDIV[5:0]
BUSCLK Frequency
(MHz) FDIV[5:0]
MIN(1) MAX(2) MIN1MAX2
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The security function in the Flash module is described in Section 20.5.
20.3.2.3 Flash CCOB Index Register (FCCOBIX)
The FCCOBIX register is used to indicate the amount of parameters loaded into the FCCOB registers for
Flash memory operations.
CCOBIX bits are readable and writable while remaining bits read 0 and are not writable.
Table 20-9. FSEC Field Descriptions
Field Description
7–6
KEYEN[1:0]
Backdoor Key Security Enable Bits — The KEYEN[1:0] bits define the enabling of backdoor key access to the
Flash module as shown in Table 20-10.
5–2
RNV[5:2]
Reserved Nonvolatile Bits — The RNV bits should remain in the erased state for future enhancements.
1–0
SEC[1:0]
Flash Security Bits — The SEC[1:0] bits define the security state of the MCU as shown in Table 20-11. If the
Flash module is unsecured using backdoor key access, the SEC bits are forced to 10.
Table 20-10. Flash KEYEN States
KEYEN[1:0] Status of Backdoor Key Access
00 DISABLED
01 DISABLED(1)
1. Preferred KEYEN state to disable backdoor key access.
10 ENABLED
11 DISABLED
Table 20-11. Flash Security States
SEC[1:0] Status of Security
00 SECURED
01 SECURED(1)
1. Preferred SEC state to set MCU to secured state.
10 UNSECURED
11 SECURED
Offset Module Base + 0x0002
76543210
R00000 CCOBIX[2:0]
W
Reset00000000
= Unimplemented or Reserved
Figure 20-7. FCCOB Index Register (FCCOBIX)
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20.3.2.4 Flash Protection Status Register (FPSTAT)
This Flash register holds the status of the Protection Override feature.
All bits in the FPSTAT register are readable but are not writable.
20.3.2.5 Flash Configuration Register (FCNFG)
The FCNFG register enables the Flash command complete interrupt, control generation of wait-states and
forces ECC faults on Flash array read access from the CPU.
Table 20-12. FCCOBIX Field Descriptions
Field Description
2–0
CCOBIX[1:0]
Common Command Register Index— The CCOBIX bits are used to indicate how many words of the FCCOB
register array are being read or written to. See Section 20.3.2.13, “Flash Common Command Object Registers
(FCCOB)“,” for more details.
Offset Module Base + 0x0003
76543210
R FPOVRD 0 0 0 0 0 0 WSTATACK
W
Reset00000001
= Unimplemented or Reserved
Figure 20-8. Flash Protection Status Register (FPSTAT)
Table 20-13. FPSTAT Field Descriptions
Field Description
7
FPOVRD
Flash Protection Override Status The FPOVRD bit indicates if the Protection Override feature is currently
enabled. See Section 20.4.7.17, “Protection Override Command” for more details.
0 Protection is not overridden
1 Protection is overridden, contents of registers FPROT and/or DFPROT (and effective protection limits
determined by their current contents) were determined during execution of command Protection Override
0
WSTATACK
Wait-State Switch Acknowledge — The WSTATACK bit indicates that the wait-state configuration is
effectively set according to the value configured on bits FCNFG[WSTAT] (see Section 20.3.2.5, “Flash
Configuration Register (FCNFG)”). WSTATACK bit is cleared when a change in FCNFG[WSTAT] is requested
by writing to those bits, and is set when the Flash has effectively switched to the new wait-state configuration.
The application must check the status of WSTATACK bit to make sure it reads as 1 before changing the
frequency setup (see Section 20.4.3, “Flash Block Read Access”).
0 Wait-State switch is pending, Flash reads are still happening according to the previous value of
FCNFG[WSTAT]
1 Wait-State switch is complete, Flash reads are already working according to the value set on
FCNFG[WSTAT]
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CCIE, IGNSF, WSTAT, FDFD, and FSFD bits are readable and writable, ERSAREQ bit is read only, and
remaining bits read 0 and are not writable.
Offset Module Base + 0x0004
76543210
RCCIE 0 ERSAREQ IGNSF WSTAT[1:0] FDFD FSFD
W
Reset00000000
= Unimplemented or Reserved
Figure 20-9. Flash Configuration Register (FCNFG)
Table 20-14. FCNFG Field Descriptions
Field Description
7
CCIE
Command Complete Interrupt Enable — The CCIE bit controls interrupt generation when a Flash command
has completed.
0 Command complete interrupt disabled
1 An interrupt will be requested whenever the CCIF flag in the FSTAT register is set (see Section 20.3.2.7)
5
ERSAREQ
Erase All Request — Requests the Memory Controller to execute the Erase All Blocks command and release
security. ERSAREQ is not directly writable but is under indirect user control. Refer to the Reference Manual for
assertion of the soc_erase_all_req input to the FTMRZ module.
0 No request or request complete
1 Request to:
a) run the Erase All Blocks command
b) verify the erased state
c) program the security byte in the Flash Configuration Field to the unsecure state
d) release MCU security by setting the SEC field of the FSEC register to the unsecure state as defined in
Table 20-9 of Section 20.3.2.2.
The ERSAREQ bit sets to 1 when soc_erase_all_req is asserted, CCIF=1 and the Memory Controller starts
executing the sequence. ERSAREQ will be reset to 0 by the Memory Controller when the operation is completed
(see Section 20.4.7.7.1).
4
IGNSF
Ignore Single Bit Fault — The IGNSF controls single bit fault reporting in the FERSTAT register (see
Section 20.3.2.8).
0 All single bit faults detected during array reads are reported
1 Single bit faults detected during array reads are not reported and the single bit fault interrupt will not be
generated
3–2
WSTAT[1:0]
Wait State control bits — The WSTAT[1:0] bits define how many wait-states are inserted on each read access
to the Flash as shown on Table 20-15.Right after reset the maximum amount of wait-states is set, to be later re-
configured by the application if needed. Depending on the system operating frequency being used the number
of wait-states can be reduced or disabled, please refer to the Data Sheet for details. For additional information
regarding the procedure to change this configuration please see Section 20.4.3. The WSTAT[1:0] bits should not
be updated while the Flash is executing a command (CCIF=0); if that happens the value of this field will not
change and no action will take place.
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20.3.2.6 Flash Error Configuration Register (FERCNFG)
The FERCNFG register enables the Flash error interrupts for the FERSTAT flags.
All assigned bits in the FERCNFG register are readable and writable.
1
FDFD
Force Double Bit Fault Detect The FDFD bit allows the user to simulate a double bit fault during Flash array
read operations. The FDFD bit is cleared by writing a 0 to FDFD.
0 Flash array read operations will set the DFDF flag in the FERSTAT register only if a double bit fault is detected
1 Any Flash array read operation will force the DFDF flag in the FERSTAT register to be set (see
Section 20.3.2.7)
0
FSFD
Force Single Bit Fault Detect The FSFD bit allows the user to simulate a single bit fault during Flash array
read operations and check the associated interrupt routine. The FSFD bit is cleared by writing a 0 to FSFD.
0 Flash array read operations will set the SFDIF flag in the FERSTAT register only if a single bit fault is detected
1 Flash array read operation will force the SFDIF flag in the FERSTAT register to be set (see Section 20.3.2.7)
and an interrupt will be generated as long as the SFDIE interrupt enable in the FERCNFG register is set (see
Section 20.3.2.6)
Table 20-15. Flash Wait-States control
WSTAT[1:0] Wait-State configuration
00 ENABLED, maximum number of cycles(1)
1. Reset condition. For a target of 100MHz core frequency /
50MHz bus frequency the maximum number required is 1
cycle.
01 reserved(2)
2. Value will read as 01 or 10, as written. In the current
implementation the Flash will behave the same as 00 (wait-
states enabled, maximum number of cycles).
10 reserved2
11 DISABLED
Offset Module Base + 0x0005
76543210
R0000000
SFDIE
W
Reset00000000
= Unimplemented or Reserved
Figure 20-10. Flash Error Configuration Register (FERCNFG)
Table 20-14. FCNFG Field Descriptions (continued)
Field Description
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20.3.2.7 Flash Status Register (FSTAT)
The FSTAT register reports the operational status of the Flash module.
CCIF, ACCERR, and FPVIOL bits are readable and writable, MGBUSY and MGSTAT bits are readable
but not writable, while remaining bits read 0 and are not writable.
Table 20-16. FERCNFG Field Descriptions
Field Description
0
SFDIE
Single Bit Fault Detect Interrupt Enable The SFDIE bit controls interrupt generation when a single bit fault
is detected during a Flash block read operation.
0 SFDIF interrupt disabled whenever the SFDIF flag is set (see Section 20.3.2.8)
1 An interrupt will be requested whenever the SFDIF flag is set (see Section 20.3.2.8)
Offset Module Base + 0x0006
76543210
RCCIF 0ACCERR FPVIOL MGBUSY RSVD MGSTAT[1:0]
W
Reset1000000
(1)
1. Reset value can deviate from the value shown if a double bit fault is detected during the reset sequence (see Section 20.6).
01
= Unimplemented or Reserved
Figure 20-11. Flash Status Register (FSTAT)
Table 20-17. FSTAT Field Descriptions
Field Description
7
CCIF
Command Complete Interrupt Flag — The CCIF flag indicates that a Flash command has completed. The
CCIF flag is cleared by writing a 1 to CCIF to launch a command and CCIF will stay low until command
completion or command violation.
0 Flash command in progress
1 Flash command has completed
5
ACCERR
Flash Access Error Flag — The ACCERR bit indicates an illegal access has occurred to the Flash memory
caused by either a violation of the command write sequence (see Section 20.4.5.2) or issuing an illegal Flash
command. While ACCERR is set, the CCIF flag cannot be cleared to launch a command. The ACCERR bit is
cleared by writing a 1 to ACCERR. Writing a 0 to the ACCERR bit has no effect on ACCERR.
0 No access error detected
1 Access error detected
4
FPVIOL
Flash Protection Violation Flag —The FPVIOL bit indicates an attempt was made to program or erase an
address in a protected area of P-Flash or EEPROM memory during a command write sequence. The FPVIOL
bit is cleared by writing a 1 to FPVIOL. Writing a 0 to the FPVIOL bit has no effect on FPVIOL. While FPVIOL
is set, it is not possible to launch a command or start a command write sequence.
0 No protection violation detected
1 Protection violation detected
3
MGBUSY
Memory Controller Busy Flag — The MGBUSY flag reflects the active state of the Memory Controller.
0 Memory Controller is idle
1 Memory Controller is busy executing a Flash command (CCIF = 0)
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20.3.2.8 Flash Error Status Register (FERSTAT)
The FERSTAT register reflects the error status of internal Flash operations.
All flags in the FERSTAT register are readable and only writable to clear the flag.
2
RSVD
Reserved Bit — This bit is reserved and always reads 0.
1–0
MGSTAT[1:0]
Memory Controller Command Completion Status Flag — One or more MGSTAT flag bits are set if an error
is detected during execution of a Flash command or during the Flash reset sequence. The MGSTAT bits are
cleared automatically at the start of the execution of a Flash command. See Section 20.4.7, “Flash Command
Description,” and Section 20.6, “Initialization” for details.
Offset Module Base + 0x0007
76543210
R000000
DFDF SFDIF
W
Reset00000000
= Unimplemented or Reserved
Figure 20-12. Flash Error Status Register (FERSTAT)
Table 20-18. FERSTAT Field Descriptions
Field Description
1
DFDF
Double Bit Fault Detect Flag — The setting of the DFDF flag indicates that a double bit fault was detected in
the stored parity and data bits during a Flash array read operation or that a Flash array read operation returning
invalid data was attempted on a Flash block that was under a Flash command operation.(1) The DFDF flag is
cleared by writing a 1 to DFDF. Writing a 0 to DFDF has no effect on DFDF.(2)
0 No double bit fault detected
1 Double bit fault detected or a Flash array read operation returning invalid data was attempted while command
running. See Section 20.4.3, “Flash Block Read Access” for details
1. In case of ECC errors the corresponding flag must be cleared for the proper setting of any further error, i.e. any new error will
only be indicated properly when DFDF and/or SFDIF are clear at the time the error condition is detected.
2. There is a one cycle delay in storing the ECC DFDF and SFDIF fault flags in this register. At least one NOP is required after
a flash memory read before checking FERSTAT for the occurrence of ECC errors.
0
SFDIF
Single Bit Fault Detect Interrupt Flag — With the IGNSF bit in the FCNFG register clear, the SFDIF flag
indicates that a single bit fault was detected in the stored parity and data bits during a Flash array read operation
or that a Flash array read operation returning invalid data was attempted on a Flash block that was under a Flash
command operation. The SFDIF flag is cleared by writing a 1 to SFDIF. Writing a 0 to SFDIF has no effect on
SFDIF.
0 No single bit fault detected
1 Single bit fault detected and corrected or a Flash array read operation returning invalid data was attempted
while command running
Table 20-17. FSTAT Field Descriptions (continued)
Field Description
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 779
20.3.2.9 P-Flash Protection Register (FPROT)
The FPROT register defines which P-Flash sectors are protected against program and erase operations.
The (unreserved) bits of the FPROT register are writable Normal Single Chip Mode with the restriction
that the size of the protected region can only be increased see Section 20.3.2.9.1, “P-Flash Protection
Restrictions,” and Table 20-23). All (unreserved) bits of the FPROT register are writable without
restriction in Special Single Chip Mode.
During the reset sequence, the FPROT register is loaded with the contents of the P-Flash protection byte
in the Flash configuration field at global address 0xFF_FE0C located in P-Flash memory (see Table 20-4)
as indicated by reset condition ‘F’ in Figure 20-13. To change the P-Flash protection that will be loaded
during the reset sequence, the upper sector of the P-Flash memory must be unprotected, then the P-Flash
protection byte must be reprogrammed. If a double bit fault is detected while reading the P-Flash phrase
containing the P-Flash protection byte during the reset sequence, the FPOPEN bit will be cleared and
remaining bits in the FPROT register will be set to leave the P-Flash memory fully protected.
Trying to alter data in any protected area in the P-Flash memory will result in a protection violation error
and the FPVIOL bit will be set in the FSTAT register. The block erase of a P-Flash block is not possible
if any of the P-Flash sectors contained in the same P-Flash block are protected.
Offset Module Base + 0x0008
76543210
RFPOPEN RNV6 FPHDIS FPHS[1:0] FPLDIS FPLS[1:0]
W
Reset F(1)
1. Loaded from Flash configuration field, during reset sequence.
F1F1F1F1F1F1F1
= Unimplemented or Reserved
Figure 20-13. Flash Protection Register (FPROT)
Table 20-19. FPROT Field Descriptions
Field Description
7
FPOPEN
Flash Protection Operation Enable — The FPOPEN bit determines the protection function for program or
erase operations as shown in Table 20-20 for the P-Flash block.
0 When FPOPEN is clear, the FPHDIS and FPLDIS bits define unprotected address ranges as specified by the
corresponding FPHS and FPLS bits
1 When FPOPEN is set, the FPHDIS and FPLDIS bits enable protection for the address range specified by the
corresponding FPHS and FPLS bits
6
RNV[6]
Reserved Nonvolatile Bit — The RNV bit should remain in the erased state for future enhancements.
5
FPHDIS
Flash Protection Higher Address Range Disable — The FPHDIS bit determines whether there is a
protected/unprotected area in a specific region of the P-Flash memory ending with global address 0xFF_FFFF.
0 Protection/Unprotection enabled
1 Protection/Unprotection disabled
4–3
FPHS[1:0]
Flash Protection Higher Address Size The FPHS bits determine the size of the protected/unprotected area
in P-Flash memory as shown inTable 20-21. The FPHS bits can only be written to while the FPHDIS bit is set.
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
780 Freescale Semiconductor
All possible P-Flash protection scenarios are shown in Figure 20-14 . Although the protection scheme is
loaded from the Flash memory at global address 0xFF_FE0C during the reset sequence, it can be changed
by the user. The P-Flash protection scheme can be used by applications requiring reprogramming in
normal single chip mode while providing as much protection as possible if reprogramming is not required.
2
FPLDIS
Flash Protection Lower Address Range Disable — The FPLDIS bit determines whether there is a
protected/unprotected area in a specific region of the P-Flash memory beginning with global address
0xFF_8000.
0 Protection/Unprotection enabled
1 Protection/Unprotection disabled
1–0
FPLS[1:0]
Flash Protection Lower Address SizeThe FPLS bits determine the size of the protected/unprotected area
in P-Flash memory as shown in Table 20-22. The FPLS bits can only be written to while the FPLDIS bit is set.
Table 20-20. P-Flash Protection Function
FPOPEN FPHDIS FPLDIS Function(1)
1. For range sizes, refer to Table 20-21 and Table 20-22.
1 1 1 No P-Flash Protection
1 1 0 Protected Low Range
1 0 1 Protected High Range
1 0 0 Protected High and Low Ranges
0 1 1 Full P-Flash Memory Protected
0 1 0 Unprotected Low Range
0 0 1 Unprotected High Range
0 0 0 Unprotected High and Low Ranges
Table 20-21. P-Flash Protection Higher Address Range
FPHS[1:0] Global Address Range Protected Size
00 0xFF_F800–0xFF_FFFF 2 KB
01 0xFF_F000–0xFF_FFFF 4 KB
10 0xFF_E000–0xFF_FFFF 8 KB
11 0xFF_C000–0xFF_FFFF 16 KB
Table 20-22. P-Flash Protection Lower Address Range
FPLS[1:0] Global Address Range Protected Size
00 0xFF_8000–0xFF_83FF 1 KB
01 0xFF_8000–0xFF_87FF 2 KB
10 0xFF_8000–0xFF_8FFF 4 KB
11 0xFF_8000–0xFF_9FFF 8 KB
Table 20-19. FPROT Field Descriptions (continued)
Field Description
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 781
Figure 20-14. P-Flash Protection Scenarios
7654
FPHS[1:0] FPLS[1:0]
3210
FPHS[1:0] FPLS[1:0]
FPHDIS = 1
FPLDIS = 1
FPHDIS = 1
FPLDIS = 0
FPHDIS = 0
FPLDIS = 1
FPHDIS = 0
FPLDIS = 0
Scenario
Scenario
Unprotected region Protected region with size
Protected region Protected region with size
defined by FPLS
defined by FPHSnot defined by FPLS, FPHS
0xFF_8000
0xFF_FFFF
0xFF_8000
0xFF_FFFF
FLASH START
FLASH START
FPOPEN = 1FPOPEN = 0
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
782 Freescale Semiconductor
20.3.2.9.1 P-Flash Protection Restrictions
In Normal Single Chip mode the general guideline is that P-Flash protection can only be added and not
removed. Table 20-23 specifies all valid transitions between P-Flash protection scenarios. Any attempt to
write an invalid scenario to the FPROT register will be ignored. The contents of the FPROT register reflect
the active protection scenario. See the FPHS and FPLS bit descriptions for additional restrictions.
20.3.2.10 EEPROM Protection Register (DFPROT)
The DFPROT register defines which EEPROM sectors are protected against program and erase
operations.
The (unreserved) bits of the DFPROT register are writable in Normal Single Chip mode with the
restriction that protection can be added but not removed. Writes in Normal Single Chip mode must
increase the DPS value and the DPOPEN bit can only be written from 1 (protection disabled) to 0
(protection enabled). If the DPOPEN bit is set, the state of the DPS bits is irrelevant. All DPOPEN/DPS
bit registers are writable without restriction in Special Single Chip Mode.
Table 20-23. P-Flash Protection Scenario Transitions
From
Protection
Scenario
To Protection Scenario(1)
1. Allowed transitions marked with X, see Figure 20-14 for a definition of the scenarios.
01234567
0XXXX
1XX
2XX
3X
4XX
5XXXX
6XXXX
7XXXXXXXX
Offset Module Base + 0x0009
76543210
RDPOPEN DPS[6:0](1)
1. The number of implemented DPS bits depends on the EEPROM memory size, as explained below.
W
Reset F(2)
2. Loaded from IFR Flash configuration field, during reset sequence.
F2F2F2F2F2F2F2
= Unimplemented or Reserved
Figure 20-15. EEPROM Protection Register (DFPROT)
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 783
During the reset sequence, fields DPOPEN and DPS of the DFPROT register are loaded with the contents
of the EEPROM protection byte in the Flash configuration field at global address 0xFF_FE0D located in
P-Flash memory (see Table 20-4) as indicated by reset condition F in Table 20-25. To change the
EEPROM protection that will be loaded during the reset sequence, the P-Flash sector containing the
EEPROM protection byte must be unprotected, then the EEPROM protection byte must be programmed.
If a double bit fault is detected while reading the P-Flash phrase containing the EEPROM protection byte
during the reset sequence, the DPOPEN bit will be cleared and DPS bits will be set to leave the EEPROM
memory fully protected.
Trying to alter data in any protected area in the EEPROM memory will result in a protection violation error
and the FPVIOL bit will be set in the FST AT register. Block erase of the EEPROM memory is not possible
if any of the EEPROM sectors are protected.
The number of DPS bits depends on the size of the implemented EEPROM. The whole implemented
EEPROM range can always be protected. Each DPS value increment increases the size of the protected
range by 32-bytes. Thus to protect a 1 KB range DPS[4:0] must be set (protected range of 32 x 32 bytes).
Table 20-24. DFPROT Field Descriptions
Field Description
7
DPOPEN
EEPROM Protection Control
0 Enables EEPROM memory protection from program and erase with protected address range defined by DPS
bits
1 Disables EEPROM memory protection from program and erase
6–0
DPS[6:0]
EEPROM Protection Size — The DPS bits determine the size of the protected area in the EEPROM memory
as shown inTable 20-25 .
Table 20-25. EEPROM Protection Address Range
DPS[6:0] Global Address Range Protected Size
0000000 0x10_0000 – 0x10_001F 32 bytes
0000001 0x10_0000 – 0x10_003F 64 bytes
0000010 0x10_0000 – 0x10_005F 96 bytes
0000011 0x10_0000 – 0x10_007F 128 bytes
0000100 0x10_0000 – 0x10_009F 160 bytes
The Protection Size goes on enlarging in step of 32 bytes, for each DPS
value increment
.
.
0001111 0x10_0000 – 0x10_01FF 512 bytes
0011111 0x10_0000 – 0x10_03FF 1K byte
0111111 0x10_0000 – 0x10_07FF 2K bytes
1111111 0x10_0000 – 0x10_0FFF 4K bytes
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
784 Freescale Semiconductor
20.3.2.11 Flash Option Register (FOPT)
The FOPT register is the Flash option register.
All bits in the FOPT register are readable but are not writable.
During the reset sequence, the FOPT register is loaded from the Flash nonvolatile byte in the Flash
configuration field at global address 0xFF_FE0E located in P-Flash memory (see Table 20-4) as indicated
by reset condition F in Figure 20-16. If a double bit fault is detected while reading the P-Flash phrase
containing the Flash nonvolatile byte during the reset sequence, all bits in the FOPT register will be set.
20.3.2.12 Flash Reserved1 Register (FRSV1)
This Flash register is reserved for factory testing.
All bits in the FRSV1 register read 0 and are not writable.
20.3.2.13 Flash Common Command Object Registers (FCCOB)
The FCCOB is an array of six words. Byte wide reads and writes are allowed to the FCCOB registers.
Offset Module Base + 0x000A
76543210
R NV[7:0]
W
Reset F(1)
1. Loaded from Flash configuration field, during reset sequence.
F1F1F1F1F1F1F1
= Unimplemented or Reserved
Figure 20-16. Flash Option Register (FOPT)
Table 20-26. FOPT Field Descriptions
Field Description
7–0
NV[7:0]
Nonvolatile Bits — The NV[7:0] bits are available as nonvolatile bits. Refer to the device overview for proper
use of the NV bits.
Offset Module Base + 0x000B
76543210
R00000000
W
Reset00000000
= Unimplemented or Reserved
Figure 20-17. Flash Reserved1 Register (FRSV1)
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 785
Offset Module Base + 0x000C
76543210
RCCOB[15:8]
W
Reset00000000
Figure 20-18. Flash Common Command Object 0 High Register (FCCOB0HI)
Offset Module Base + 0x000D
76543210
RCCOB[7:0]
W
Reset00000000
Figure 20-19. Flash Common Command Object 0 Low Register (FCCOB0LO)
Offset Module Base + 0x000E
76543210
RCCOB[15:8]
W
Reset00000000
Figure 20-20. Flash Common Command Object 1 High Register (FCCOB1HI)
Offset Module Base + 0x000F
76543210
RCCOB[7:0]
W
Reset00000000
Figure 20-21. Flash Common Command Object 1 Low Register (FCCOB1LO)
Offset Module Base + 0x0010
76543210
RCCOB[15:8]
W
Reset00000000
Figure 20-22. Flash Common Command Object 2 High Register (FCCOB2HI)
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
786 Freescale Semiconductor
Offset Module Base + 0x0011
76543210
RCCOB[7:0]
W
Reset00000000
Figure 20-23. Flash Common Command Object 2 Low Register (FCCOB2LO)
Offset Module Base + 0x0012
76543210
RCCOB[15:8]
W
Reset00000000
Figure 20-24. Flash Common Command Object 3 High Register (FCCOB3HI)
Offset Module Base + 0x0013
76543210
RCCOB[7:0]
W
Reset00000000
Figure 20-25. Flash Common Command Object 3 Low Register (FCCOB3LO)
Offset Module Base + 0x0014
76543210
RCCOB[15:8]
W
Reset00000000
Figure 20-26. Flash Common Command Object 4 High Register (FCCOB4HI)
Offset Module Base + 0x0015
76543210
RCCOB[7:0]
W
Reset00000000
Figure 20-27. Flash Common Command Object 4 Low Register (FCCOB4LO)
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 787
20.3.2.13.1 FCCOB - NVM Command Mode
NVM command mode uses the FCCOB registers to provide a command code and its relevant parameters
to the Memory Controller. The user first sets up all required FCCOB fields and then initiates the
command’s execution by writing a 1 to the CCIF bit in the FSTAT register (a 1 written by the user clears
the CCIF command completion flag to 0). When the user clears the CCIF bit in the FSTAT register all
FCCOB parameter fields are locked and cannot be changed by the user until the command completes (as
evidenced by the Memory Controller returning CCIF to 1). Some commands return information to the
FCCOB register array.
The generic format for the FCCOB parameter fields in NVM command mode is shown in Table 20-27.
The return values are available for reading after the CCIF flag in the FSTAT register has been returned to
1 by the Memory Controller. The value written to the FCCOBIX field must reflect the amount of CCOB
words loaded for command execution.
Table 20-27 shows the generic Flash command format. The high byte of the first word in the CCOB array
contains the command code, followed by the parameters for this specific Flash command. For details on
the FCCOB settings required by each command, see the Flash command descriptions in Section 20.4.7.
Offset Module Base + 0x0016
76543210
RCCOB[15:8]
W
Reset00000000
Figure 20-28. Flash Common Command Object 5 High Register (FCCOB5HI)
Offset Module Base + 0x0017
76543210
RCCOB[7:0]
W
Reset00000000
Figure 20-29. Flash Common Command Object 5 Low Register (FCCOB5LO)
Table 20-27. FCCOB - NVM Command Mode (Typical Usage)
CCOBIX[2:0] Register Byte FCCOB Parameter Fields (NVM Command Mode)
000 FCCOB0 HI FCMD[7:0] defining Flash command
LO Global address [23:16]
001 FCCOB1 HI Global address [15:8]
LO Global address [7:0]
010 FCCOB2 HI Data 0 [15:8]
LO Data 0 [7:0]
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
788 Freescale Semiconductor
20.4 Functional Description
20.4.1 Modes of Operation
The module provides the modes of operation normal and special. The operating mode is determined by
module-level inputs and affects the FCLKDIV, FCNFG, and DFPROT registers (see Table 20-29).
20.4.2 IFR Version ID Word
The version ID word is stored in the IFR at address 0x1F_C0B6. The contents of the word are defined in
Table 20-28.
VERNUM: Version number . The first version is number 0b_0001 with both 0b_0000 and 0b_1 1 1 1
meaning ‘none’.
20.4.3 Flash Block Read Access
If data read from the Flash block results in a double-bit fault ECC error (meaning that data is detected to
be in error and cannot be corrected), the read data will be tagged as invalid during that access (please look
into the Reference Manual for details). Forcing the DFDF status bit by setting FDFD (see Section 20.3.2.5)
has effect only on the DFDF status bit value and does not result in an invalid access.
To guarantee the proper read timing from the Flash array, the Flash will control (i.e. pause) the S12Z core
accesses, considering that the MCU can be configured to fetch data at a faster frequency than the Flash
011 FCCOB3 HI Data 1 [15:8]
LO Data 1 [7:0]
100 FCCOB4 HI Data 2 [15:8]
LO Data 2 [7:0]
101 FCCOB5 HI Data 3 [15:8]
LO Data 3 [7:0]
Table 20-28. IFR Version ID Fields
[15:4] [3:0]
Reserved VERNUM
Table 20-27. FCCOB - NVM Command Mode (Typical Usage)
CCOBIX[2:0] Register Byte FCCOB Parameter Fields (NVM Command Mode)
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 789
block can support. Right after reset the Flash will be configured to run with the maximum amount of wait-
states enabled; if the user application is setup to run at a slower frequency the control bits
FCNFG[WSTAT] (see Section 20.3.2.5) can be configured by the user to disable the generation of wait-
states, so it does not impose a performance penalty to the system if the read timing of the S12Z core is
setup to be within the margins of the Flash block. For a definition of the frequency values where wait-states
can be disabled please refer to the device electrical parameters.
The following sequence must be followed when the transition from a higher frequency to a lower
frequency is going to happen:
Flash resets with wait-states enabled;
system frequency must be configured to the lower target;
user writes to FNCNF[WSTAT] to disable wait-states;
user reads the value of FPSTAT[WSTATACK], the new wait-state configuration will be effective
when it reads as 1;
user must re-write FCLKDIV to set a new value based on the lower frequency.
The following sequence must be followed on the contrary direction, going from a lower frequency to a
higher frequency:
user writes to FCNFG[WSTAT] to enable wait-states;
user reads the value of FPSTAT[WSTATACK], the new wait-state configuration will be effective
when it reads as 1;
user must re-write FCLKDIV to set a new value based on the higher frequency;
system frequency must be set to the upper target.
CAUTION
If the application is going to require the frequency setup to change, the value
to be loaded on register FCLKDIV will have to be updated according to the
new frequency value. In this scenario the application must take care to avoid
locking the value of the FCLKDIV register: bit FDIVLCK must not be set
if the value to be loaded on FDIV is going to be re-written, otherwise a reset
is going to be required. Please refer to Section 20.3.2.1, “Flash Clock
Divider Register (FCLKDIV) and Section 20.4.5.1, “Writing the FCLKDIV
Register.
20.4.4 Internal NVM resource
IFR is an internal NVM resource readable by CPU. The IFR fields are shown in Table 20-5.
The NVM Resource Area global address map is shown in Table 20-6.
20.4.5 Flash Command Operations
Flash command operations are used to modify Flash memory contents.
The next sections describe:
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
790 Freescale Semiconductor
How to write the FCLKDIV register that is used to generate a time base (FCLK) derived from
BUSCLK for Flash program and erase command operations
The command write sequence used to set Flash command parameters and launch execution
Valid Flash commands available for execution, according to MCU functional mode and MCU
security state.
20.4.5.1 Writing the FCLKDIV Register
Prior to issuing any Flash program or erase command after a reset, the user is required to write the
FCLKDIV register to divide BUSCLK down to a target FCLK of 1 MHz. Table 20-8 shows recommended
values for the FDIV field based on BUSCLK frequency.
NOTE
Programming or erasing the Flash memory cannot be performed if the bus
clock runs at less than 0.8 MHz. Setting FDIV too high can destroy the Flash
memory due to overstress. Setting FDIV too low can result in incomplete
programming or erasure of the Flash memory cells.
When the FCLKDIV register is written, the FDIVLD bit is set automatically. If the FDIVLD bit is 0, the
FCLKDIV register has not been written since the last reset. If the FCLKDIV register has not been written,
any Flash program or erase command loaded during a command write sequence will not execute and the
ACCERR bit in the FSTAT register will set.
20.4.5.2 Command Write Sequence
The Memory Controller will launch all valid Flash commands entered using a command write sequence.
Before launching a command, the ACCERR and FPVIOL bits in the FSTAT register must be clear (see
Section 20.3.2.7) and the CCIF flag should be tested to determine the status of the current command wr ite
sequence. If CCIF is 0, the previous command write sequence is still active, a new command write
sequence cannot be started, and all writes to the FCCOB register are ignored.
20.4.5.2.1 Define FCCOB Contents
The FCCOB parameter fields must be loaded with all required parameters for the Flash command being
executed. The CCOBIX bits in the FCCOBIX register must reflect the amount of words loaded into the
FCCOB registers (see Section 20.3.2.3).
The contents of the FCCOB parameter fields are transferred to the Memory Controller when the user clears
the CCIF command completion flag in the FSTAT register (writing 1 clears the CCIF to 0). The CCIF flag
will remain clear until the Flash command has completed. Upon completion, the Memory Controller will
return CCIF to 1 and the FCCOB register will be used to communicate any results. The flow for a generic
command write sequence is shown in Figure 20-30.
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 791
Figure 20-30. Generic Flash Command Write Sequence Flowchart
Write to FCCOBIX register
Write: FSTAT register (to launch command)
Clear CCIF 0x80
Clear ACCERR/FPVIOL 0x30
Write: FSTAT register
yes
no
Access Error and
Protection Violation
Read: FSTAT register
START
Check
FCCOB
ACCERR/
FPVIOL
Set?
EXIT
Write: FCLKDIV register
Read: FCLKDIV register
yes
no
FDIV
Correct?
no
Bit Polling for
Command Completion
Check yes
CCIF Set?
to indicate number of parameters
to be loaded.
Write to FCCOB register
to load required command parameter.
yes
no
More
Parameters?
Availability Check
Results from previous Command
Note: FCLKDIV must be
set after each reset
Read: FSTAT register
no
yes
CCIF
Set?
no
yes
CCIF
Set?
Clock Divider
Value Check
Read: FSTAT register
Chapter 20 Flash Module (S12ZFTMRZ)
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792 Freescale Semiconductor
20.4.5.3 Valid Flash Module Commands
Table 20-29 present the valid Flash commands, as enabled by the combination of the functional MCU
mode (Normal SingleChip NS, Special Singlechip SS) with the MCU security state (Unsecured, Secured).
+
Table 20-29. Flash Commands by Mode and Security State
FCMD Command
Unsecured Secured
NS
(1)
1. Unsecured Normal Single Chip mode
SS(2)
2. Unsecured Special Single Chip mode.
NS
(3)
3. Secured Normal Single Chip mode.
SS(4)
4. Secured Special Single Chip mode.
0x01 Erase Verify All Blocks 
0x02 Erase Verify Block 
0x03 Erase Verify P-Flash Section 
0x04 Read Once 
0x06 Program P-Flash 
0x07 Program Once 
0x08 Erase All Blocks 
0x09 Erase Flash Block 
0x0A Erase P-Flash Sector 
0x0B Unsecure Flash 
0x0C Verify Backdoor Access Key 
0x0D Set User Margin Level 
0x0E Set Field Margin Level
0x10 Erase Verify EEPROM Section 
0x11 Program EEPROM 
0x12 Erase EEPROM Sector 
0x13 Protection Override 
Chapter 20 Flash Module (S12ZFTMRZ)
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Freescale Semiconductor 793
20.4.5.4 P-Flash Commands
Table 20-30 summarizes the valid P-Flash commands along with the effects of the commands on the P-
Flash block and other resources within the Flash module.
20.4.5.5 EEPROM Commands
Table 20-31 summarizes the valid EEPROM commands along with the effects of the commands on the
EEPROM block.
Table 20-30. P-Flash Commands
FCMD Command Function on P-Flash Memory
0x01 Erase Verify All
Blocks
Verify that all P-Flash (and EEPROM) blocks are erased.
0x02 Erase Verify Block Verify that a P-Flash block is erased.
0x03 Erase Verify P-
Flash Section
Verify that a given number of words starting at the address provided are erased.
0x04 Read Once Read a dedicated 64 byte field in the nonvolatile information register in P-Flash block that
was previously programmed using the Program Once command.
0x06 Program P-Flash Program a phrase in a P-Flash block.
0x07 Program Once Program a dedicated 64 byte field in the nonvolatile information register in P-Flash block
that is allowed to be programmed only once.
0x08 Erase All Blocks
Erase all P-Flash (and EEPROM) blocks.
An erase of all Flash blocks is only possible when the FPLDIS, FPHDIS, and FPOPEN
bits in the FPROT register and the DPOPEN bit in the DFPROT register are set prior to
launching the command.
0x09 Erase Flash Block
Erase a P-Flash (or EEPROM) block.
An erase of the full P-Flash block is only possible when FPLDIS, FPHDIS and FPOPEN
bits in the FPROT register are set prior to launching the command.
0x0A Erase P-Flash
Sector
Erase all bytes in a P-Flash sector.
0x0B Unsecure Flash Supports a method of releasing MCU security by erasing all P-Flash (and EEPROM)
blocks and verifying that all P-Flash (and EEPROM) blocks are erased.
0x0C Verify Backdoor
Access Key
Supports a method of releasing MCU security by verifying a set of security keys.
0x0D Set User Margin
Level
Specifies a user margin read level for all P-Flash blocks.
0x0E Set Field Margin
Level
Specifies a field margin read level for all P-Flash blocks (special modes only).
0x13 Protection
Override
Supports a mode to temporarily override Protection configuration (for P-Flash and/or
EEPROM) by verifying a key.
Chapter 20 Flash Module (S12ZFTMRZ)
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794 Freescale Semiconductor
20.4.6 Allowed Simultaneous P-Flash and EEPROM Operations
Only the operations marked ‘OK’ in Table 20-32 are permitted to be run simultaneously on combined
Program Flash and EEPROM blocks. Some operations cannot be executed simultaneously because certain
hardware resources are shared by the two memories. The priority has been placed on permitting Program
Flash reads while program and erase operations execute on the EEPROM, providing read (P-Flash) while
write (EEPROM) functionality. Any attempt to access P-Flash and EEPROM simultaneously when it is
not allowed will result in an illegal access that will trigger a machine exception in the CPU (see device
information for details). Please note that during the execution of each command there is a period, before
the operation in the Flash array actually starts, where reading is allowed and valid data is returned. Even
if the simultaneous operation is marked as not allowed the Flash will report an illegal access only in the
cycle the read collision actually happens, maximizing the time the array is available for reading.
If more than one hardblock exists on a device, then read operations on one hardblock are permitted whilst
program or erase operations are executed on the other hardblock.
Table 20-31. EEPROM Commands
FCMD Command Function on EEPROM Memory
0x01 Erase Verify All
Blocks
Verify that all EEPROM (and P-Flash) blocks are erased.
0x02 Erase Verify Block Verify that the EEPROM block is erased.
0x08 Erase All Blocks
Erase all EEPROM (and P-Flash) blocks.
An erase of all Flash blocks is only possible when the FPLDIS, FPHDIS, and FPOPEN
bits in the FPROT register and the DPOPEN bit in the DFPROT register are set prior to
launching the command.
0x09 Erase Flash Block
Erase a EEPROM (or P-Flash) block.
An erase of the full EEPROM block is only possible when DPOPEN bit in the DFPROT
register is set prior to launching the command.
0x0B Unsecure Flash Supports a method of releasing MCU security by erasing all EEPROM (and P-Flash)
blocks and verifying that all EEPROM (and P-Flash) blocks are erased.
0x0D Set User Margin
Level
Specifies a user margin read level for the EEPROM block.
0x0E Set Field Margin
Level
Specifies a field margin read level for the EEPROM block (special modes only).
0x10 Erase Verify
EEPROM Section
Verify that a given number of words starting at the address provided are erased.
0x11 Program
EEPROM
Program up to four words in the EEPROM block.
0x12 Erase EEPROM
Sector
Erase all bytes in a sector of the EEPROM block.
0x13 Protection
Override
Supports a mode to temporarily override Protection configuration (for P-Flash and/or
EEPROM) by verifying a key.
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 795
20.4.7 Flash Command Description
This section provides details of all available Flash commands launched by a command write sequence. The
ACCERR bit in the FSTAT register will be set during the command write sequence if any of the following
illegal steps are performed, causing the command not to be processed by the Memory Controller:
Starting any command write sequence that programs or erases Flash memory before initializing the
FCLKDIV register
Writing an invalid command as part of the command write sequence
For additional possible errors, refer to the error handling table provided for each command
If a Flash block is read during execution of an algorithm (CCIF = 0) on that same block, the read operation
may return invalid data resulting in an illegal access (as described on Section 20.4.6).
If the ACCERR or FPVIOL bits are set in the FSTAT register, the user must clear these bits before starting
any command write sequence (see Section 20.3.2.7).
CAUTION
A Flash word or phrase must be in the erased state before being
programmed. Cumulative programming of bits within a Flash word or
phrase is not allowed.
Table 20-32. Allowed P-Flash and EEPROM Simultaneous Operations on a single hardblock
EEPROM
Program Flash Read Margin
Read2Program Sector
Erase
Mass
Erase2
Read OK(1)
1. Strictly speaking, only one read of either the P-Flash or EEPROM can occur
at any given instant, but the memory controller will transparently arbitrate P-
Flash and EEPROM accesses giving uninterrupted read access whenever
possible.
OK OK OK
Margin Read(2)
2. A ‘Margin Read’ is any read after executing the margin setting commands ‘Set
User Margin Level’ or ‘Set Field Margin Level’ with anything but the ‘normal’
level specified. See the Note on margin settings in Section 20.4.7.12 and
Section 20.4.7.13.
Program
Sector Erase
Mass Erase(3)
3. The ‘Mass Erase’ operations are commands ‘Erase All Blocks’ and ‘Erase
Flash Block’
OK
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
796 Freescale Semiconductor
20.4.7.1 Erase Verify All Blocks Command
The Erase Verify All Blocks command will verify that all P-Flash and EEPROM blocks have been erased.
Upon clearing CCIF to launch the Erase Verify All Blocks command, the Memory Controller will verify
that the entire Flash memory space is erased. The CCIF flag will set after the Erase Verify All Blocks
operation has completed. If all blocks are not erased, it means blank check failed, both MGSTAT bits will
be set.
20.4.7.2 Erase Verify Block Command
The Erase Verify Block command allows the user to verify that an entire P-Flash or EEPROM block has
been erased.
Upon clearing CCIF to launch the Erase Verify Block command, the Memory Controller will verify that
the selected P-Flash or EEPROM block is erased. The CCIF flag will set after the Erase Verify Block
operation has completed.If the block is not erased, it means blank check failed, both MGSTAT bits will be
set.
Table 20-33. Erase Verify All Blocks Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x01 Not required
Table 20-34. Erase Verify All Blocks Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR Set if CCOBIX[2:0] != 000 at command launch
FPVIOL None
MGSTAT1 Set if any errors have been encountered during the reador if blank check failed .
MGSTAT0 Set if any non-correctable errors have been encountered during the read or if
blank check failed.
Table 20-35. Erase Verify Block Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x02 Global address [23:16] to
identify Flash block
FCCOB1 Global address [15:0] to identify Flash block
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 797
20.4.7.3 Erase Verify P-Flash Section Command
The Erase Verify P-Flash Section command will verify that a section of code in the P-Flash memory is
erased. The Erase Verify P-Flash Section command defines the starting point of the code to be verified and
the number of phrases.
Upon clearing CCIF to launch the Erase Verify P-Flash Section command, the Memory Controller will
verify the selected section of Flash memory is erased. The CCIF flag will set after the Erase Verify P-Flash
Section operation has completed. If the section is not erased, it means blank check failed, both MGSTAT
bits will be set.
Table 20-36. Erase Verify Block Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR Set if CCOBIX[2:0] != 001 at command launch
Set if an invalid global address [23:0] is supplied see Table 20-3)
FPVIOL None
MGSTAT1 Set if any errors have been encountered during the read or if blank check failed.
MGSTAT0 Set if any non-correctable errors have been encountered during the read or if
blank check failed.
Table 20-37. Erase Verify P-Flash Section Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x03 Global address [23:16] of
a P-Flash block
FCCOB1 Global address [15:0] of the first phrase to be verified
FCCOB2 Number of phrases to be verified
Table 20-38. Erase Verify P-Flash Section Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 010 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied see Table 20-3)
Set if a misaligned phrase address is supplied (global address [2:0] != 000)
Set if the requested section crosses a the P-Flash address boundary
FPVIOL None
MGSTAT1 Set if any errors have been encountered during the read or if blank check failed.
MGSTAT0 Set if any non-correctable errors have been encountered during the read or if
blank check failed.
Chapter 20 Flash Module (S12ZFTMRZ)
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798 Freescale Semiconductor
20.4.7.4 Read Once Command
The Read Once command provides read access to a reserved 64 byte field (8 phrases) located in the
nonvolatile information register of P-Flash. The Read Once field is programmed using the Program Once
command described in Section 20.4.7.6. The Read Once command must not be executed from the Flash
block containing the Program Once reserved field to avoid code runaway.
Upon clearing CCIF to launch the Read Once command, a Read Once phrase is fetched and stored in the
FCCOB indexed register. The CCIF flag will set after the Read Once operation has completed. Valid
phrase index values for the Read Once command range from 0x0000 to 0x0007. During execution of the
Read Once command, any attempt to read addresses within P-Flash block will return invalid data.
8
20.4.7.5 Program P-Flash Command
The Program P-Flash operation will program a previously erased phrase in the P-Flash memory using an
embedded algorithm.
CAUTION
A P-Flash phrase must be in the erased state before being programmed.
Cumulative programming of bits within a Flash phrase is not allowed.
Table 20-39. Read Once Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x04 Not Required
FCCOB1 Read Once phrase index (0x0000 - 0x0007)
FCCOB2 Read Once word 0 value
FCCOB3 Read Once word 1 value
FCCOB4 Read Once word 2 value
FCCOB5 Read Once word 3 value
Table 20-40. Read Once Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 001 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid phrase index is supplied
FPVIOL None
MGSTAT1 Set if any errors have been encountered during the read
MGSTAT0 Set if any non-correctable errors have been encountered during the read
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 799
Upon clearing CCIF to launch the Program P-Flash command, the Memory Controller will program the
data words to the supplied global address and will then proceed to verify the data words read back as
expected. The CCIF flag will set after the Program P-Flash operation has completed.
20.4.7.6 Program Once Command
The Program Once command restricts programming to a reserved 64 byte field (8 phrases) in the
nonvolatile information register located in P-Flash. The Program Once reserved field can be read using the
Read Once command as described in Section 20.4.7.4. The Program Once command must only be issued
once since the nonvolatile information register in P-Flash cannot be erased. The Program Once command
must not be executed from the Flash block containing the Program Once reserved field to avoid code
runaway.
Table 20-41. Program P-Flash Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x06 Global address [23:16] to
identify P-Flash block
FCCOB1 Global address [15:0] of phrase location to be programmed(1)
1. Global address [2:0] must be 000
FCCOB2 Word 0 program value
FCCOB3 Word 1 program value
FCCOB4 Word 2 program value
FCCOB5 Word 3 program value
Table 20-42. Program P-Flash Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 101 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied see Table 20-3)
Set if a misaligned phrase address is supplied (global address [2:0] != 000)
FPVIOL Set if the global address [17:0] points to a protected area
MGSTAT1 Set if any errors have been encountered during the verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the verify
operation
Table 20-43. Program Once Command FCCOB Requirements
CCOBIX[2:0] FCCOB Parameters
FCCOB0 0x07 Not Required
FCCOB1 Program Once phrase index (0x0000 - 0x0007)
FCCOB2 Program Once word 0 value
Chapter 20 Flash Module (S12ZFTMRZ)
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800 Freescale Semiconductor
Upon clearing CCIF to launch the Program Once command, the Memory Controller first verifies that the
selected phrase is erased. If erased, then the selected phrase will be programmed and then verified with
read back. The CCIF flag will remain clear, setting only after the Program Once operation has completed.
The reserved nonvolatile information register accessed by the Program Once command cannot be erased
and any attempt to program one of these phrases a second time will not be allowed. Valid phrase index
values for the Program Once command range from 0x0000 to 0x0007. During execution of the Program
Once command, any attempt to read addresses within P-Flash will return invalid data.
20.4.7.7 Erase All Blocks Command
The Erase All Blocks operation will erase the entire P-Flash and EEPROM memory space.
Upon clearing CCIF to launch the Erase All Blocks command, the Memory Controller will erase the entire
Flash memory space and verify that it is erased. If the Memory Controller verifies that the entire Flash
memory space was properly erased, security will be released. During the execution of this command
(CCIF=0) the user must not write to any Flash module register. The CCIF flag will set after the Erase All
Blocks operation has completed.
FCCOB3 Program Once word 1 value
FCCOB4 Program Once word 2 value
FCCOB5 Program Once word 3 value
Table 20-44. Program Once Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 101 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid phrase index is supplied
Set if the requested phrase has already been programmed(1)
1. If a Program Once phrase is initially programmed to 0xFFFF_FFFF_FFFF_FFFF, the Program Once command will
be allowed to execute again on that same phrase.
FPVIOL None
MGSTAT1 Set if any errors have been encountered during the verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the verify
operation
Table 20-45. Erase All Blocks Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x08 Not required
Table 20-43. Program Once Command FCCOB Requirements
CCOBIX[2:0] FCCOB Parameters
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 801
20.4.7.7.1 Erase All Pin
The functionality of the Erase All Blocks command is also available in an uncommanded fashion from the
soc_erase_all_req input pin on the Flash module. Refer to the Reference Manual for information on
control of soc_erase_all_req.
The erase-all function requires the clock divider register FCLKDIV (see Section 20.3.2.1) to be loaded
before invoking this function using soc_erase_all_req input pin. The FCLKDIV configuration for this
feature is described at device level. If FCLKDIV is not properly set the erase-all operation will not execute
and the ACCERR flag in FSTAT register will set. After the execution of the erase-all function the
FCLKDIV register will be reset and the value of register FCLKDIV must be loaded before launching any
other command afterwards.
Before invoking the erase-all function using the soc_erase_all_req pin, the ACCERR and FPVIOL flags
in the FSTAT register must be clear. When invoked from soc_erase_all_req the erase-all function will
erase all P-Flash memory and EEPROM memory space regardless of the protection settings. If the post-
erase verify passes, the routine will then release security by setting the SEC field of the FSEC register to
the unsecure state (see Section 20.3.2.2). The security byte in the Flash Configuration Field will be
programmed to the unsecure state (see Table 20-9). The status of the erase-all request is reflected in the
ERSAREQ bit in the FCNFG register (see Section 20.3.2.5). The ERSAREQ bit in FCNFG will be cleared
once the operation has completed and the normal FSTAT error reporting will be available as described
inTable 20-47.
At the end of the erase-all sequence Protection will remain configured as it was before executing the erase-
all function. If the application requires programming P-Flash and/or EEPROM after the erase-all function
completes, the existing protection limits must be taken into account. If protection needs to be disabled the
user may need to reset the system right after completing the erase-all function.
Table 20-46. Erase All Blocks Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR Set if CCOBIX[2:0] != 000 at command launch
Set if command not available in current mode (see Table 20-29)
FPVIOL Set if any area of the P-Flash or EEPROM memory is protected
MGSTAT1 Set if any errors have been encountered during the verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the verify
operation
Table 20-47. Erase All Pin Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR Set if command not available in current mode (see Table 20-29)
MGSTAT1 Set if any errors have been encountered during the erase verify operation, or
during the program verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the erase verify
operation, or during the program verify operation
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
802 Freescale Semiconductor
20.4.7.8 Erase Flash Block Command
The Erase Flash Block operation will erase all addresses in a P-Flash or EEPROM block.
Upon clearing CCIF to launch the Erase Flash Block command, the Memory Controller will erase the
selected Flash block and verify that it is erased. The CCIF flag will set after the Erase Flash Block
operation has completed.
20.4.7.9 Erase P-Flash Sector Command
The Erase P-Flash Sector operation will erase all addresses in a P-Flash sector.
Upon clearing CCIF to launch the Erase P-Flash Sector command, the Memory Controller will erase the
selected Flash sector and then verify that it is erased. The CCIF flag will be set after the Erase P-Flash
Sector operation has completed.
Table 20-48. Erase Flash Block Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x09 Global address [23:16] to
identify Flash block
FCCOB1 Global address [15:0] in Flash block to be erased
Table 20-49. Erase Flash Block Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 001 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied
Set if the supplied P-Flash address is not phrase-aligned or if the EEPROM
address is not word-aligned
FPVIOL Set if an area of the selected Flash block is protected
MGSTAT1 Set if any errors have been encountered during the verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the verify
operation
Table 20-50. Erase P-Flash Sector Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x0A Global address [23:16] to identify
P-Flash block to be erased
FCCOB1 Global address [15:0] anywhere within the sector to be erased.
Refer to Section 20.1.2.1 for the P-Flash sector size.
Chapter 20 Flash Module (S12ZFTMRZ)
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Freescale Semiconductor 803
20.4.7.10 Unsecure Flash Command
The Unsecure Flash command will erase the entire P-Flash and EEPROM memory space and, if the erase
is successful, will release security.
Upon clearing CCIF to launch the Unsecure Flash command, the Memory Controller will erase the entire
P-Flash and EEPROM memory space and verify that it is erased. If the Memory Controller verifies that
the entire Flash memory space was properly erased, security will be released. If the erase verify is not
successful, the Unsecure Flash operation sets MGSTAT1 and terminates without changing the security
state. During the execution of this command (CCIF=0) the user must not write to any Flash module
register. The CCIF flag is set after the Unsecure Flash operation has completed.
20.4.7.11 Verify Backdoor Access Key Command
The Verify Backdoor Access Key command will only execute if it is enabled by the KEYEN bits in the
FSEC register (see Table 20-10). The Verify Backdoor Access Key command releases security if user-
supplied keys match those stored in the Flash security bytes of the Flash configuration field (see Table 20-
Table 20-51. Erase P-Flash Sector Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 001 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied see Table 20-3)
Set if a misaligned phrase address is supplied (global address [2:0] != 000)
FPVIOL Set if the selected P-Flash sector is protected
MGSTAT1 Set if any errors have been encountered during the verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the verify
operation
Table 20-52. Unsecure Flash Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x0B Not required
Table 20-53. Unsecure Flash Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR Set if CCOBIX[2:0] != 000 at command launch
Set if command not available in current mode (see Table 20-29)
FPVIOL Set if any area of the P-Flash or EEPROM memory is protected
MGSTAT1 Set if any errors have been encountered during the verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the verify
operation
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
804 Freescale Semiconductor
4). The Verify Backdoor Access Key command must not be executed from the Flash block containing the
backdoor comparison key to avoid code runaway.
Upon clearing CCIF to launch the Verify Backdoor Access Key command, the Memory Controller will
check the FSEC KEYEN bits to verify that this command is enabled. If not enabled, the Memory
Controller sets the ACCERR bit in the FSTAT register and terminates. If the command is enabled, the
Memory Controller compares the key provided in FCCOB to the backdoor comparison key in the Flash
configuration field with Key 0 compared to 0xFF_FE00, etc. If the backdoor keys match, security will be
released. If the backdoor keys do not match, security is not released and all future attempts to execute the
Verify Backdoor Access Key command are aborted (set ACCERR) until a reset occurs. The CCIF flag is
set after the Verify Backdoor Access Key operation has completed.
20.4.7.12 Set User Margin Level Command
The Set User Margin Level command causes the Memory Controller to set the margin level for future read
operations of the P-Flash or EEPROM block.
Table 20-54. Verify Backdoor Access Key Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x0C Not required
FCCOB1 Key 0
FCCOB2 Key 1
FCCOB3 Key 2
FCCOB4 Key 3
Table 20-55. Verify Backdoor Access Key Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 100 at command launch
Set if an incorrect backdoor key is supplied
Set if backdoor key access has not been enabled (KEYEN[1:0] != 10, see
Section 20.3.2.2)
Set if the backdoor key has mismatched since the last reset
FPVIOL None
MGSTAT1 None
MGSTAT0 None
Table 20-56. Set User Margin Level Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x0D Global address [23:16] to identify Flash
block
FCCOB1 Global address [15:0] to identify Flash block
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 805
Upon clearing CCIF to launch the Set User Margin Level command, the Memory Controller will set the
user margin level for the targeted block and then set the CCIF flag.
NOTE
When the EEPROM block is targeted, the EEPROM user margin levels are
applied only to the EEPROM reads. However, when the P-Flash block is
targeted, the P-Flash user margin levels are applied to both P-Flash and
EEPROM reads. It is not possible to apply user margin levels to the P-Flash
block only.
Valid margin level settings for the Set User Margin Level command are defined in Table 20-57.
NOTE
User margin levels can be used to check that Flash memory contents have
adequate mar gin for normal leve l read operations. If unexpected results are
encountered when checking Flash memory contents at user margin levels, a
potential loss of information has been detected.
FCCOB2 Margin level setting.
Table 20-57. Valid Set User Margin Level Settings
FCCOB2 Level Description
0x0000 Return to Normal Level
0x0001 User Margin-1 Level(1)
1. Read margin to the erased state
0x0002 User Margin-0 Level(2)
2. Read margin to the programmed state
Table 20-58. Set User Margin Level Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 010 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied see Table 20-3)
Set if an invalid margin level setting is supplied
FPVIOL None
MGSTAT1 None
MGSTAT0 None
Table 20-56. Set User Margin Level Command FCCOB Requirements
Register FCCOB Parameters
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
806 Freescale Semiconductor
20.4.7.13 Set Field Margin Level Command
The Set Field Margin Level command, valid in special modes only, causes the Memory Controller to set
the margin level specified for future read operations of the P-Flash or EEPROM block.
Upon clearing CCIF to launch the Set Field Margin Level command, the Memory Controller will set the
field margin level for the targeted block and then set the CCIF flag.
NOTE
When the EEPROM block is targeted, the EEPROM field margin levels are
applied only to the EEPROM reads. However, when the P-Flash block is
targeted, the P-Flash field margin levels are applied to both P-Flash and
EEPROM reads. It is not possible to apply field margin levels to the P-Flash
block only.
Valid margin level settings for the Set Field Margin Level command are defined in Table 20-60.
Table 20-59. Set Field Margin Level Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x0E Global address [23:16] to identify Flash
block
FCCOB1 Global address [15:0] to identify Flash block
FCCOB2 Margin level setting.
Table 20-60. Valid Set Field Margin Level Settings
FCCOB2 Level Description
0x0000 Return to Normal Level
0x0001 User Margin-1 Level(1)
1. Read margin to the erased state
0x0002 User Margin-0 Level(2)
2. Read margin to the programmed state
0x0003 Field Margin-1 Level1
0x0004 Field Margin-0 Level2
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 807
CAUTION
Field margin levels must only be used during verify of the initial factory
programming.
NOTE
Field margin levels can be used to check that Flash memory contents have
adequate margin for data retention at the normal level setting. If unexpected
results are encountered when checking Flash memory contents at field
margin levels, the Flash memory contents should be erased and
reprogrammed.
20.4.7.14 Erase Verify EEPROM Section Command
The Erase Verify EEPROM Section command will verify that a section of code in the EEPROM is erased.
The Erase Verify EEPROM Section command defines the starting point of the data to be verified and the
number of words.
Upon clearing CCIF to launch the Erase Verify EEPROM Section command, the Memory Controller will
verify the selected section of EEPROM memory is erased. The CCIF flag will set after the Erase Verify
EEPROM Section operation has completed. If the section is not erased, it means blank check failed, both
MGSTAT bits will be set.
Table 20-61. Set Field Margin Level Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 010 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied see Table 20-3)
Set if an invalid margin level setting is supplied
FPVIOL None
MGSTAT1 None
MGSTAT0 None
Table 20-62. Erase Verify EEPROM Section Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x10
Global address [23:16] to
identify the EEPROM
block
FCCOB1 Global address [15:0] of the first word to be verified
FCCOB2 Number of words to be verified
Chapter 20 Flash Module (S12ZFTMRZ)
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808 Freescale Semiconductor
20.4.7.15 Program EEPROM Command
The Program EEPROM operation programs one to four previously erased words in the EEPROM block.
The Program EEPROM operation will confirm that the targeted location(s) were successfully programmed
upon completion.
CAUTION
A Flash word must be in the erased state before being programmed.
Cumulative programming of bits within a Flash word is not allowed.
Upon clearing CCIF to launch the Program EEPROM command, the user-supplied words will be
transferred to the Memory Controller and be programmed if the area is unprotected. The CCOBIX index
value at Program EEPROM command launch determines how many words will be programmed in the
EEPROM block. The CCIF flag is set when the operation has completed.
Table 20-63. Erase Verify EEPROM Section Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 010 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied
Set if a misaligned word address is supplied (global address [0] != 0)
Set if the requested section breaches the end of the EEPROM block
FPVIOL None
MGSTAT1 Set if any errors have been encountered during the read or if blank check failed.
MGSTAT0 Set if any non-correctable errors have been encountered during the read or if
blank check failed.
Table 20-64. Program EEPROM Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x11 Global address [23:16] to
identify the EEPROM block
FCCOB1 Global address [15:0] of word to be programmed
FCCOB2 Word 0 program value
FCCOB3 Word 1 program value, if desired
FCCOB4 Word 2 program value, if desired
FCCOB5 Word 3 program value, if desired
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 809
20.4.7.16 Erase EEPROM Sector Command
The Erase EEPROM Sector operation will erase all addresses in a sector of the EEPROM block.
Upon clearing CCIF to launch the Erase EEPROM Sector command, the Memory Controller will erase the
selected Flash sector and verify that it is erased. The CCIF flag will set after the Erase EEPROM Sector
operation has completed.
Table 20-65. Program EEPROM Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] < 010 at command launch
Set if CCOBIX[2:0] > 101 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied
Set if a misaligned word address is supplied (global address [0] != 0)
Set if the requested group of words breaches the end of the EEPROM block
FPVIOL Set if the selected area of the EEPROM memory is protected
MGSTAT1 Set if any errors have been encountered during the verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the verify
operation
Table 20-66. Erase EEPROM Sector Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x12 Global address [23:16] to identify
EEPROM block
FCCOB1 Global address [15:0] anywhere within the sector to be erased.
See Section 20.1.2.2 for EEPROM sector size.
Table 20-67. Erase EEPROM Sector Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 001 at command launch
Set if command not available in current mode (see Table 20-29)
Set if an invalid global address [23:0] is supplied see Table 20-3
Set if a misaligned word address is supplied (global address [0] != 0)
FPVIOL Set if the selected area of the EEPROM memory is protected
MGSTAT1 Set if any errors have been encountered during the verify operation
MGSTAT0 Set if any non-correctable errors have been encountered during the verify
operation
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
810 Freescale Semiconductor
20.4.7.17 Protection Override Command
The Protection Override command allows the user to temporarily override the protection limits, either
decreasing, increasing or disabling protection limits, on P-Flash and/or EEPROM, if the comparison key
provided as a parameter loaded on FCCOB matches the value of the key previously programmed on the
Flash Configuration Field (see Table 20-4). The value of the Protection Override Comparison Key must
not be 16’hFFFF, that is considered invalid and if used as argument will cause the Protection Override
feature to be disabled. Any valid key value that does not match the value programmed in the Flash
Configuration Field will cause the Protection Override feature to be disabled. Current status of the
Protection Override feature can be observed on FPSTAT FPOVRD bit (see Section 20.3.2.4, “Flash
Protection Status Register (FPSTAT)).
If the comparison key successfully matches the key programmed in the Flash Configuration Field the
Protection Override command will preserve the current values of registers FPROT and DFPROT stored in
an internal area and will override these regis ters as selected by the Protection Update Selection field with
the value(s) loaded on FCCOB parameters. The new values loaded into FPROT and/or DFPROT can
reconfigure protection without any restriction (by increasing, decreasing or disabling protection limits). If
the command executes successfully the FPSTAT FPOVRD bit will set.
If the comparison key does not match the key programmed in the Flash Configuration Field, or if the key
loaded on FCCOB is 16’hFFFF, the value of registers FPROT and DFPROT will be restored to their
original contents before executing the Protection Override command and the FPSTAT FPOVRD bit will
be cleared. If the contents of the Protection Override Comparison Key in the Flash Configuration Field is
left in the erased state (i.e. 16’hFFFF) the Protection Override feature is permanently disabled. If the
command execution is flagged as an error (ACCERR being set for incorrect command launch) the values
of FPROT and DFPROT will not be modified.
Table 20-68. Protection Override Command FCCOB Requirements
Register FCCOB Parameters
FCCOB0 0x13 Protection Update Selection
[1:0] See Table 20-69
FCCOB1 Comparison Key
FCCOB2 reserved New FPROT value
FCCOB3 reserved New DFPROT value
Table 20-69. Protection Override selection description
Protection Update
Selection code [1:0] Protection register selection
bit 0
Update P-Flash protection
0 - keep unchanged (do not update)
1 - update P-Flash protection with new FPROT value loaded on FCCOB
bit 1
Update EEPROM protection
0 - keep unchanged (do not update)
1 - update EEPROM protection with new DFPROT value loaded on FCCOB
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 811
The Protection Override command can be called multiple times and every time it is launched it will
preserve the current values of registers FPROT and DFPROT in a single-entry buffer to be restored later;
when the Protection Override command is launched to restore FPROT and DFPROT these registers will
assume the values they had before executing the Protection Override command on the last time. If contents
of FPROT and/or DFPROT registers were modified by direct register writes while protection is overridden
these modifications will be lost. Running Protection Override command to restore the contents of registers
FPROT and DFPROT will not force them to the reset values.
20.4.8 Interrupts
The Flash module can generate an interrupt when a Flash command operation has completed or when a
Flash command operation has detected an ECC fault.
NOTE
Vector addresses and their relative interrupt priority are determined at the
MCU level.
Table 20-70. Protection Override Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != (001, 010 or 011) at command launch.
Set if command not available in current mode (see Table 20-29).
Set if protection is supposed to be restored (if key does not match or is invalid) and
Protection Override command was not run previously (bit FPSTAT FPOVRD is 0),
so there are no previous valid values of FPROT and DFPROT to be re-loaded.
Set if Protection Update Selection[1:0] = 00 (in case of CCOBIX[2:0] = 010 or 011)
Set if Protection Update Selection[1:0] = 00, CCOBIX[2:0] = 001 and a valid
comparison key is loaded as a command parameter.
FPVIOL None
MGSTAT1 None
MGSTAT0 None
Table 20-71. Flash Interrupt Sources
Interrupt Source Interrupt Flag Local Enable Global (CCR)
Mask
Flash Command Complete CCIF
(FSTAT register)
CCIE
(FCNFG register)
I Bit
ECC Single Bit Fault on Flash Read SFDIF
(FERSTAT register)
SFDIE
(FERCNFG register)
I Bit
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
812 Freescale Semiconductor
20.4.8.1 Description of Flash Interrupt Operation
The Flash module uses the CCIF flag in combination with the CCIE interrupt enable bit to generate the
Flash command interrupt request. The Flash module uses the SFDIF flag in combination with the SFDIE
interrupt enable bits to generate the Flash error interrupt request. For a detailed description of the register
bits involved, refer to Section 20.3.2.5, “Flash Configuration Register (FCNFG)”, Section 20.3.2.6, “Flash
Error Configuration Register (FERCNFG)”, Section 20.3.2.7, “Flash Status Register (FSTAT)”, and
Section 20.3.2.8, “Flash Error Status Register (FERSTAT)”.
The logic used for generating the Flash module interrupts is shown in Figure 20-31.
Figure 20-31. Flash Module Interrupts Implementation
20.4.9 Wait Mode
The Flash module is not affected if the MCU enters wait mode. The Flash module can recover the MCU
from wait via the CCIF interrupt (see Section 20.4.8, “Interrupts”).
20.4.10 Stop Mode
If a Flash command is active (CCIF = 0) when the MCU requests stop mode, the current Flash operation
will be completed before the MCU is allowed to enter stop mode.
20.5 Security
The Flash module provides security information to the MCU. The Flash security state is defined by the
SEC bits of the FSEC register (see Table 20-11). During reset, the Flash module initializes the FSEC
register using data read from the security byte of the Flash configuration field at global address
0xFF_FE0F. The security state out of reset can be permanently changed by programming the security byte
assuming that the MCU is starting from a mode where the necessary P-Flash erase and program commands
are available and that the upper region of the P-Flash is unprotected. If the Flash security byte is
successfully programmed, its new value will take affect after the next MCU reset.
The following subsections describe these security-related subjects:
Unsecuring the MCU using Backdoor Key Access
Unsecuring the MCU in Special Single Chip Mode using BDM
Mode and Security Effects on Flash Command Availability
Flash Error Interrupt Request
CCIF
CCIE
SFDIF
SFDIE
Flash Command Interrupt Request
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 813
20.5.1 Unsecuring the MCU using Backdoor Key Access
The MCU may be unsecured by using the backdoor key access feature which requires knowledge of the
contents of the backdoor keys (four 16-bit words programmed at addresses 0xFF_FE00-0xFF_FE07). If
the KEYEN[1:0] bits are in the enabled state (see Section 20.3.2.2), the Verify Backdoor Access Key
command (see Section 20.4.7.11) allows the user to present four prospective keys for comparison to the
keys stored in the Flash memory via the Memory Controller. If the keys presented in the Verify Backdoor
Access Key command match the backdoor keys stored in the Flash memory, the SEC bits in the FSEC
register (see Table 20-11) will be changed to unsecure the MCU. Key values of 0x0000 and 0xFFFF are
not permitted as backdoor keys. While the Verify Backdoor Access Key command is active, P-Flash
memory and EEPROM memory will not be available for read access and will return invalid data.
The user code stored in the P-Flash memory must have a method of receiving the backdoor keys from an
external stimulus. This external stimulus would typically be through one of the on-chip serial ports.
If the KEYEN[1:0] bits are in the enabled state (see Section 20.3.2.2), the MCU can be unsecured by the
backdoor key access sequence described below:
1. Follow the command sequence for the Verify Backdoor Access Key command as explained in
Section 20.4.7.11
2. If the Verify Backdoor Access Key command is successful, the MCU is unsecured and the
SEC[1:0] bits in the FSEC register are forced to the unsecure state of 10
The Verify Backdoor Access Key command is monitored by the Memory Controller and an illegal key will
prohibit future use of the Verify Backdoor Access Key command. A reset of the MCU is the only method
to re-enable the Verify Backdoor Access Key command. The security as defined in the Flash security byte
(0xFF_FE0F) is not changed by using the Verify Backdoor Access Key command sequence. The backdoor
keys stored in addresses 0xFF_FE00-0xFF_FE07 are unaff ected by the Verify Backdoor Access Key
command sequence. The Verify Backdoor Access Key command sequence has no effect on the program
and erase protections defined in the Flash protection register, FPROT.
After the backdoor keys have been correctly matched, the MCU will be unsecured. After the MCU is
unsecured, the sector containing the Flash security byte can be erased and the Flash security byte can be
reprogrammed to the unsecure state, if desired. In the unsecure state, the user has full control of the
contents of the backdoor keys by programming addresses 0xFF_FE00-0xFF_FE07 in the Flash
configuration field.
20.5.2 Unsecuring the MCU in Special Single Chip Mode using BDM
A secured MCU can be unsecured in special single chip mode using an automated procedure described in
Section 20.4.7.7.1, “Erase All Pin”.
20.5.3 Mode and Security Effects on Flash Command Availability
The availability of Flash module commands depends on the MCU operating mode and security state as
shown in Table 20-29.
Chapter 20 Flash Module (S12ZFTMRZ)
MC9S12ZVM Family Reference Manual Rev. 2.2
814 Freescale Semiconductor
20.6 Initialization
On each system reset the flash module executes an initialization sequence which establishes initial values
for the Flash Block Configuration Parameters, the FPROT and DFPROT protection registers, and the
FOPT and FSEC registers. The initialization routine reverts to built-in default values that leave the module
in a fully protected and secured state if errors are encountered during execution of the reset sequence. If a
double bit fault is detected during the reset sequence, both MGSTAT bits in the FSTAT register will be set.
CCIF is cleared throughout the initialization sequence. The Flash module holds off all CPU access for a
portion of the initialization sequence. Flash reads are allowed once the hold is removed. Completion of the
initialization sequence is marked by setting CCIF high which enables user commands.
If a reset occurs while any Flash command is in progress, that command will be immediately aborted. The
state of the word being programmed or the sector/block being erased is not guaranteed.
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 815
Chapter 21
CAN Physical Layer (S12CANPHYV3)
Table 21-1. Revision History Table
NOTE
The information given in this section are preliminary and should be used as
a guide only. Values in this section cannot be guaranteed by Freescale and
are subject to change without notice.
21.1 Introduction
The CAN Physical Layer provides a physical layer for high speed CAN area network communication in
automotive applications. It serves as an integrated interface to the CAN bus lines for the internally
connected MSCAN controller through the pins CANH, CANL and SPLIT.
The CAN Physical Layer is designed to meet the CAN Physical Layer ISO 11898-2 and ISO 11898-5
standards.
21.1.1 Features
The CAN Physical Layer module includes these distinctive features:
High speed CAN interface for baud rates of up to 1 Mbit/s
ISO 11898-2 and ISO 11898-5 compliant for 12 V battery systems
SPLIT pin driver for bus recessive level stabilization
Low power mode with remote CAN wake-up handled by MSCAN module
Configurable wake-up pulse filtering
Over-current shutdown for CANH and CANL
Voltage monitoring on CANH and CANL
CPTXD-dominant timeout feature monitoring the CPTXD signal
Fulfills the OEM “Hardware Requirements for (LIN,) CAN (and FlexRay) Interfaces in
Automotive Applications” v1.3
Revision
Number Revision Date Sections
Affected Description of Changes
V02.00 05 Nov 2012 Added CPTXD-dominant timeout feature
V03.00 15 Apr 2013
Made transmit driver (CANH & CANL) independent of CPCHVL condition
Changed CPCLVL condition to disable CANL only
Added mode to cover separation of CANH and CANL drivers
Added configurable wake-up filter
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
816 Freescale Semiconductor
21.1.2 Modes of Operation
There are five modes the CAN Physical Layer can take (refer to 21.5.2 for details):
1. Shutdown mode
In shutdown mode the CAN Physical Layer is fully de-biased including the wake-up receiver.
2. Normal mode
In normal mode the transceiver is fully biased and functional. The SPLIT pin drives 2.5 V if
enabled.
3. Pseudo-normal mode
Same as normal mode with CANL driver disabled.
4. Listen-only mode
Same as normal mode with transmitter de-biased.
5. Standby mode with configurable wake-up feature
In standby mode the transceiver is fully de-biased. The wake-up receiver is enabled out of reset.
CPU Run Mode
The CAN Physical Layer is able to operate normally in modes 1 to 4.
CPU Wait Mode
The CAN Physical Layer operation is the same as in CPU run mode.
CPU Stop Mode
The CAN Physical Layer enters standby mode when the device voltage regulator switches to
reduced performance mode (“RPM”) after a CPU stop mode request.
If enabled, the wake-up pulse filtering mechanism is activated immediately at CPU stop mode
entry.
21.1.3 Block Diagram
Figure 21-1 shows a block diagram of the CAN Physical Layer. The module consists of a precision
receiver, a low-power wake-up receiver, an output driver and diagnostics.
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 817
Figure 21-1. CAN Physical Layer Block Diagram
21.2 External Signal Description
Table 21-2 shows the external pins associated with the CAN Physical Layer.
Table 21-2. CAN Physical Layer Signal Properties
Name Function
CANH CAN Bus High Pin
SPLIT 2.5 V Termination Pin
CANL CAN Bus Low Pin
VDDC Supply Pin for CAN Physical Layer
VSSC Ground Pin for CAN Physical Layer
VDDC
2.5V
CPRXD
CPTXD
CHOCIF
CLOCIF
0V
CANH
SPLIT
CANL
0V
5V
0V
5V
CLVL
CLVH
CHVL
CHVH
CAN BUS
Normal/Shutdown/
SPE
VSSC
Interrupt
Standby mode
intern.
mid
point
high-z
Time
out
CPDTIF
Generation
Precision
Receiver
Wake-up
Receiver
Standby
0
1
Mode
Status
Change
Status
Change
Status
Change
Status
Change
CLVLIF
CLVHIF
CHVLIF
CHVHIF
Wake-up
Filter
Standby
Mode
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
818 Freescale Semiconductor
21.2.1 CANH — CAN Bus High Pin
The CANH signal either connects directly to CAN bus high line or through an optional external common
mode choke.
21.2.2 CANL — CAN Bus Low Pin
The CANL signal either connects directly to CAN bus low line or through an optional external common
mode choke.
21.2.3 SPLIT — CAN Bus Termination Pin
The SPLIT pin can drive a 2.5 V bias for bus termination purpose (CAN bus middle point). Usage of this
pin is optional and depends on bus termination strategy for a given bus network.
21.2.4 VDDC — Supply Pin for CAN Physical Layer
The VDDC pin is used to supply the CAN Physical Layer with 5 V from an external source.
21.2.5 VSSC — Ground Pin for CAN Physical Layer
The VSSC pin is the return path for the 5 V supply (VDDC).
21.3 Internal Signal Description
21.3.1 CPTXD — TXD Input to CAN Physical Layer
CPTXD is the input signal to the CAN Physical Layer. A logic 1 on this input is considered CAN recessive
and a logic 0 as dominant level.
Per default, CPTXD is connected device-internally to the TXCAN transmitter output of the MSCAN
module. For optional routing options consult the device level documentation.
21.3.2 CPRXD — RXD Output of CAN Physical Layer
CPRXD is the output signal of the CAN Physical Layer. A logic 1 on this output represents CAN recessive
and a logic 0 a dominant level.
In stand-by mode the wake-up receiver is routed to this output. A dominant pulse filter can optionally be
enabled to increase robustness against false wake-up pulses. In any other mode this signal defaults to the
precision receiver without a pulse filter.
Per default, CPRXD is connected device-internally to the RXCAN receiver input of the MSCAN module.
For optional routing options consult the device level documentation.
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 819
21.4 Memory Map and Register Definition
This section provides a detailed description of all registers accessible in the CAN Physical Layer.
21.4.1 Module Memory Map
A summary of the registers associated with the CAN Physical Layer sub-block is shown in Table 21-3.
Detailed descriptions of the registers and bits are given in the following sections.
NOTE
Register Address = Module Base Address + Address Offset, where the
Module Base Address is defined at the MCU level and the Address Offset
is defined at the module level.
Address
Offset
Register
Name Bit 7654321Bit 0
0x0000 CPDR RCPDR700000
CPDR1 CPDR0
W
0x0001 CPCR RCPE SPE WUPE1-0 0SLR2-0
W
0x0002 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0003 CPSR R CPCHVH CPCHVL CPCLVH CPCLVL CPDT 0 0 0
W
0x0004 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0005 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0006 CPIE R0 0 0 CPVFIE CPDTIE 00
CPOCIE
W
0x0007 CPIF RCHVHIF CHVLIF CLVHIF CLVLIF CPDTIF 0CHOCIF CLOCIF
W
= Unimplemented or Reserved
Table 21-3. CAN Physical Layer Register Summary
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
820 Freescale Semiconductor
21.4.2 Register Descriptions
This section describes all CAN Physical Layer registers and their individual bits.
21.4.2.1 Port CP Data Register (CPDR)
Module Base + 0x0000 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
RCPDR700000
CPDR1 CPDR0
W
Reset10000011
Figure 21-2. Port CP Data Register (CPDR)
Table 21-4. CPDR Register Field Descriptions
Field Description
7
CPDR7
Port CP Data Bit 7
Read-only bit. The synchronized CAN Physical Layer wake-up receiver output can be read at any time.
1
CPDR1
Port CP Data Bit 1
The CAN Physical Layer CPTXD input can be directly controlled through this register bit if routed here (see
device-level specification). In this case the register bit value is driven to the pin.
0 CPTXD is driven low (dominant)
1 CPTXD is driven high (recessive)
0
CPDR0
Port CP Data Bit 0
Read-only bit. The synchronized CAN Physical Layer CPRXD output state can be read at any time.
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 821
21.4.2.2 CAN Physical Layer Control Register (CPCR)
Module Base + 0x0001 Access: User read/write(1)
1. Read: Anytime
Write: Anytime except CPE which is set once
76543210
RCPE SPE WUPE1-0 0SLR2-0
W
Reset00100000
Figure 21-3. CAN Physical Layer Control Register (CPCR)
Table 21-5. CPCR Register Field Descriptions
Field Description
7
CPE
CAN Physical Layer Enable
Set once. If set to 1, the CAN Physical Layer exits shutdown mode and enters normal mode.
0 CAN Physical Layer is disabled (shutdown mode)
1 CAN Physical Layer is enabled
6
SPE
Split Enable
If set to 1, the CAN Physical Layer SPLIT pin drives a 2.5 V bias in normal and listen-only mode.
0 SPLIT pin is high-impedance
1 SPLIT pin drives a 2.5 V bias
5-4
WUPE1-0
Wake-Up Receiver Enable and Filter Select
If WUPE[1:0]0, the CAN Physical Layer wake-up receiver is enabled when not in shutdown mode. To save
additional power, these bits should be set to 00, if the CAN bus is not used to wake up the device.
For robustness against false wake-up an optional pulse filter can be enabled.
00 Wake-up receiver is disabled
10 Wake-up receiver is enabled, no filtering
01 Wake-up receiver is enabled, first wake-up event is masked
11 Wake-up receiver is enabled, first two wake-up events are masked
2-0
SLR2-0
Slew Rate
The slew rate controls recessive to dominant and dominant to recessive transitions. This affects the delay time
from CPTXD to the bus and from the bus to CPRXD. The loop time is thus affected by the slew rate selection.
Six slew rates are available:
000 CAN Physical Layer slew rate 0
001 CAN Physical Layer slew rate 1
010 CAN Physical Layer slew rate 2
011 Reserved
100 CAN Physical Layer slew rate 4
101 CAN Physical Layer slew rate 5
110 CAN Physical Layer slew rate 6
111 R eserved
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
822 Freescale Semiconductor
21.4.2.3 Reserved Register
NOTE
This reserved register is designed for factory test purposes only and is not
intended for general user access. Writing to this register when in special
modes can alter the modules functionality.
21.4.2.4 CAN Physical Layer Status Register (CPSR)
Module Base + 0x0002 Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode
76543210
RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
Figure 21-4. Reserved Register
Module Base + 0x0003 Access: User read/write(1)
1. Read: Anytime
Write: Never
76543210
R CPCHVH CPCHVL CPCLVH CPCLVL CPDT 0 0 0
W
Reset00000000
Figure 21-5. CAN Physical Layer Status Register (CPSR)
Table 21-6. CPSR Register Field Descriptions
Field Description
7
CPCHVH
CANH Voltage Failure High Status Bit
This bit reflects the CANH voltage failure high monitor status.
0 Condition VCANH VH5
1 Condition VCANH VH5
6
CPCHVL
CANH Voltage Failure Low Status Bit
This bit reflects the CANH voltage failure low monitor status.
0 Condition VCANH VH0
1 Condition VCANH VH0
5
CPCLVH
CANL Voltage Failure High Status Bit
This bit reflects the CANL voltage failure high monitor status.
0 Condition VCANL VL5
1 Condition VCANL VL5
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 823
4
CPCLVL
CANL Voltage Failure Low Status Bit
This bit reflects the CANL voltage failure low monitor status.
0 Condition VCANL VL0
1 Condition VCANL VL0
3
CPDT
CPTXD-Dominant Timeout Status Bit
This bit is set to 1, if CPTXD is dominant for longer than tCPTXDDT. It signals a timeout event and remains set
until CPTXD returns to recessive level for longer than 1 s.
0 No CPTXD-timeout occurred or CPTXD has ceased to be dominant after timeout
1 CPTXD-dominant timeout occurred and CPTXD is still dominant
Table 21-6. CPSR Register Field Descriptions
Field Description
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
824 Freescale Semiconductor
21.4.2.5 Reserved Register
21.4.2.6 Reserved Register
21.4.2.7 CAN Physical Layer Interrupt Enable Register (CPIE)
Module Base + 0x0004 Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode
NOTE
This reserved register is designed for factory test purposes only and is not
intended for general user access. Writing to this register when in special
modes can alter the modules functionality.
76543210
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
Figure 21-6. Reserved Register
Module Base + 0x0005 Access: User read/write(1)
1. Read: Anytime
Write: Only in special mode
NOTE
This reserved register is designed for factory test purposes only and is not
intended for general user access. Writing to this register when in special
modes can alter the modules functionality.
76543210
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
Resetxxxxxxxx
Figure 21-7. Reserved Register
Module Base + 0x0006 Access: User read/write(1)
1. Read: Anytime
Write: Anytime
76543210
R0 0 0 CPVFIE CPDTIE 00
CPOCIE
W
Reset00000000
Figure 21-8. CAN Physical Layer Interrupt Enable Register (CPIE)
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 825
21.4.2.8 CAN Physical Layer Interrupt Flag Register (CPIF)
If any of the flags is asserted an error interrupt is pending if enabled. A flag can be cleared by writing a
logic level 1 to the corresponding bit location. Writing a 0 has no effect.
Table 21-7. CPIE Register Field Descriptions
Field Description
4
CPVFIE
CAN Physical Layer Voltage-Failure Interrupt Enable
If enabled, the CAN Physical Layer generates an interrupt if any of the CAN Physical Layer voltage failure
interrupt flags assert.
0 Voltage failure interrupt is disabled
1 Voltage failure interrupt is enabled
3
CPDTIE
CPTXD-Dominant Timeout Interrupt Enable
If enabled, the CAN Physical Layer generates an interrupt if the CPTXD-dominant timeout interrupt flag asserts.
0 CPTXD-dominant timeout interrupt is disabled
1 CPTXD-dominant timeout interrupt is enabled
0
CPOCIE
CAN Physical Layer Over-current Interrupt Enable
If enabled, the CAN Physical Layer generates an interrupt if any of the CAN Physical Layer over-current interrupt
flags assert.
0 Over-current interrupt is disabled
1 Over-current interrupt is enabled
Module Base + 0x0007 Access: User read/write(1)
1. Read: Anytime
Write: Anytime, write 1 to clear
76543210
RCHVHIF CHVLIF CLVHIF CLVLIF CPDTIF 0CHOCIF CLOCIF
W
Reset00000000
Figure 21-9. CAN Physical Layer Interrupt Flag Register (CPIF)
Table 21-8. CPIF Register Field Descriptions
Field Description
7
CHVHIF
CANH Voltage Failure High Interrupt Flag
This flag is set to 1 when the CPCHVH bit in the CAN Physical Layer Status Register (CPSR) changes.
0 No change in CPCHVH
1 CPCHVH has changed
6
CHVLIF
CANH Voltage Failure Low Interrupt Flag
This flag is set to 1 when the CPCHVL bit in the CAN Physical Layer Status Register (CPSR) changes.
0 No change in CPCHVL
1 CPCHVL has changed
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5
CLVHIF
CANL Voltage Failure High Interrupt Flag
This flag is set to 1 when the CPCLVH bit in the CAN Physical Layer Status Register (CPSR) changes.
0 No change in CPCLVH
1 CPCLVH has changed
4
CLVLIF
CANL Voltage Failure Low Interrupt Flag
This flag is set to 1 when the CPCLVL bit in the CAN Physical Layer Status Register (CPSR) changes.
0 No change in CPCLVL
1 CPCLVL has changed
3
CPDTIF
CAN CPTXD-Dominant Timeout Interrupt Flag
This flag is set to 1 when CPTXD is dominant longer than tCPTXDDT. It signals a timeout event and entry of
listen-only mode disabling the transmitter.
Exit of listen-only mode which was entered at timeout is requested by clearing CPDTIF when CPDT is clear after
setting CPTXD to recessive state. It takes 1 to 2 s to return to normal mode.
If CPTXD is dominant or dominant timeout status is still active (CPDT=1) when clearing the flag, the CAN
Physical Layer remains in listen-only mode and this flag is set again after a delay (see 21.5.4.2, “CPTXD-
Dominant Timeout Interrupt”).
0 No CPTXD-dominant timeout has occurred
1 CPTXD-dominant timeout has occurred
1
CHOCIF
CANH Over-Current Interrupt Flag
This flag is set to 1 if an over current condition was detected on CANH when driving a dominant bit to the CAN
bus. While this flag is asserted the CAN Physical Layer remains in listen-only mode.
0 Normal current level ICANH < ICANHOC
1 Error event ICANH ICANHOC occurred
0
CLOCIF
CANL Over-Current Interrupt Flag
This flag is set to 1 if an over current condition was detected on CANL when driving a dominant bit to the CAN
bus. While this flag is asserted the CAN Physical Layer remains in listen-only mode.
0 Normal current level ICANL < ICANLOC
1 Error event ICANL ICANLOC occurred
Table 21-8. CPIF Register Field Descriptions
Field Description
Chapter 21 CAN Physical Layer (S12CANPHYV3)
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21.5 Functional Description
21.5.1 General
The CAN Physical Layer provides an interface for the SoC-integrated MSCAN controller.
21.5.2 Modes
Figure 21-10 shows the possible mode transitions depending on control bit CPE, device reduced
performance mode (“RPM”; refer to “Low Power Modes” section in device overview) and bus error
conditions.
Figure 21-10. CAN Physical Layer Mode Transitions
21.5.2.1 Shutdown Mode
Shutdown mode is a low power mode and entered out of reset. The transceiver, wake-up, bus error
diagnostic, dominant timeout and interrupt functionality are disabled. CANH and CANL lines are pulled
Normal
TRM: On, REC: On, WUP: WUPE
CANH, CANL: Driver on
SPLIT: SPE
Listen-only
TRM: Off, REC: On, WUP: WUPE
CANH, CANL: Driver off
SPLIT: SPE
A
A & CPCLVL
Shutdown
Reset
TRM: Off, REC: Off, WUP: Off
CANH,CANL: 30Kterm. to VSSC
SPLIT: High-impedance
Standby
TRM: Off, REC: Off, WUP: WUPE
CANH,CANL: 30K term. to VSSC
SPLIT: High-impedance
TRM: Transmitter
REC: Receiver
WUP: Wake-up receiver
CPE = 1
RPM
RPM & A & CPCLVL
A = (CPCHVH| CPCLVH| CHOCIF | CLOCIF| CPDTIF1)
RPM RPM & A
1: A delay after clearing CPDTIF must be accounted for (see description)
Pseudo-Normal
TRM: On, REC: On, WUP: WUPE
CANH: Driver on, CANL: Driver off
SPLIT: SPE
CPCLVL CPCLVL
RPM
RPM & A & CPCLVL
A
A & CPCLVL
& CPTXD=1
& CPTXD=1
RPM: Reduced performance mode
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to VSSC via high-ohmic input resistors of the receiver. The SPLIT pin as well as the internal mid-point
reference are set to high-impedance.
Shutdown mode cannot be re-entered until reset.
21.5.2.2 Normal Mode
In normal mode the full transceiver functionality is available. In this mode, the CAN bus is controlled by
the CPTXD input and the CAN bus state (recessive, dominant) is reported on the CPRXD output. The
voltage failure, over-current and CPTXD-dominant timeout monitors are enabled. The SPLIT pin is
driving a 2.5 V bias if enabled. The internal mid-point reference is set to 2.5 V.
If CPTXD is high, the transmit driver is set into recessive state, and CANH and CANL lines are biased to
the voltage set at VDDC divided by 2, approx. 2.5 V.
If CPTXD is low, the transmit driver is set into dominant state, and CANH and CANL drivers are active.
CANL is pulled low and CANH is pulled high.
The receiver reports the bus state on CPRXD. If the differential voltage VCANH minus VCANL at CANH
and CANL is below the internal threshold, the bus is recessive and CPRXD is set high, otherwise a
dominant bus is detected and CPRXD is set low.
When detecting a voltage high failure, over-current or CPTXD-dominant timeout event the CAN Physical
Layer enters listen-only mode. A voltage low failure on CANL results in entering pseudo-normal mode.
A voltage low failure on CANH maintains normal mode.
NOTE
After entering normal mode from shutdown or standby mode a settling time
of tCP_set must have passed until flags can be considered as valid.
21.5.2.3 Pseudo-Normal Mode
Pseudo-normal mode is identical to normal mode except for CANL driver being disabled as a result of a
voltage low failure that has been detected on the CANL bus line (CPCLVL=1). CANH remains functional
in this mode to allow transmission. Normal mode will automatically be re-entered after the error condition
has ceased.
21.5.2.4 Listen-only Mode
Listen-only mode is entered upon detecting a CAN bus error condition (except for CPCLVL=1) or
CPTXD-dominant timeout event. The entire transmitter is forced off. All other functions of the normal
mode are maintained.
Application software action is required to re-enter normal mode by clearing the related flags if the bus error
condition was caused by an over-current (refer to 21.6.3). In case of a voltage failure, normal mode will
automatically be re-entered if the condition has passed. If the listen-only mode was caused by CPTXD-
dominant timeout event, the related flag can only be cleared after the CPTXD has returned to recessive
level.
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21.5.2.5 Standby Mode
Standby is a reduced current consumption mode and is entered during RPM following a stop mode request.
The transceiver and bus error diagnostics are disabled. The CPTXD-dominant timeout counter is stopped.
CANH and CANL lines are pulled to VSSC via high-ohmic input resistors of the receiver. The SPLIT pin
is set to high-impedance. The internal mid-point reference is set to 0V. All voltage failure and over-current
monitors are disabled.
Standby is left as soon as the device returns from RPM.
21.5.3 Configurable Wake-Up
If the wake-up function is enabled, the CAN Physical Layer provides an asynchronous path through
CPRXD to the MSCAN to support wake-up from stop mode. The CPRXD signal is switched from
precision receiver to the low-power wake-up receiver as long as the device resides in RPM.
In order to avoid false wake-up after entering stop mode, a pulse filter can be enabled and configured to
mask the first or first two wake-up events from the MSCAN input. The CPRXD output is held at recessive
level until the selected number of wake-up events have been detected as shown in Figure 21-11.
A valid wakeup-event is defined as a dominant level with a length of min. tCPWUP followed by a recessive
level of length tCPWUP.
The wake-up filter specification tWUP of the MSCAN applies to wake-up the MSCAN from sleep mode.
Refer to MSCAN chapter .After wake-up the CAN Physical Layer automatically returns to the mode where
stop mode was requested.
Refer to 21.6.2, “Wake-up Mechanism” for setup information.
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Figure 21-11. Wake-up Event Filtering
21.5.4 Interrupts
This section describes the interrupt generated by the CAN Physical Layer and its individual sources.
Vector addresses and interrupt priorities are defined at MCU level. The module internal interrupt sources
are combined (OR-ed) into one module interrupt output CPI with a single local enable bit each for voltage
failure and over-current errors.
Table 21-9. CAN Physical Layer Interrupt Sources
Module Interrupt Source Module Internal Interrupt Source Local Enable
CAN Physical Layer Interrupt (CPI) CANH Voltage Failure High Interrupt (CHVHIF) CPVFIE = 1
CANH Voltage Failure Low Interrupt (CHVLIF)
CANL Voltage Failure High Interrupt (CLVHIF)
CANL Voltage Failure Low Interrupt (CLVLIF)
CPTXD-Dominant Timeout Interrupt (CPDTIF) CPDTIE = 1
CANH Over-Current Interrupt (CHOCIF) CPOCIE = 1
CANL Over-Current Interrupt (CLOCIF)
Wake-up Receiver
Case B: CPRXD
Case C: CPRXD
Case D: CPRXD
Case A: CPRXD
tCPWUP tCPWUP tCPWUP tCPWUP
DOMINANT RECESSIVE
CANPHY Wake-up Event 1. 2.
MSCAN Wake-up
BCD
(CPCR[WUPE]=b00)
(CPCR[WUPE]=b10)
(CPCR [WUPE]=b01)
(CPCR [WUPE]=b11)
(CANCTL0[WUPE]=1
tWUP tWUP tWUP
CANPHY wake-up pulse specification:
MSCAN wake-up pulse specification:
(disables CPRXD mask)
Output
& CANCTL1[WUPM]=1)
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21.5.4.1 Voltage Failure Interrupts
A voltage failure error is detected if voltage levels on the CAN bus lines exceed the specified limits.
The voltages on both lines CANH and CANL are monitored continuously for crossing the lower and
higher thresholds, VH0, VH5 and VL0, VL5, respectively.
A comparator output transition to error level results in setting the corresponding status bit in CAN Physical
Layer Status Register (CPSR). A change of a status bit sets the related interrupt flag in CAN Physical
Layer Interrupt Flag Register (CPIF).
The flags are used as interrupt sources of which either of the four can generate a CPI interrupt if the
common enable bit CPVFIE in CAN Physical Layer Interrupt Enable Register (CPIE) is set.
21.5.4.2 CPTXD-Dominant Timeout Interrupt
For network lock-up protection of the CAN bus, the CAN physical layer features a permanent CPTXD-
dominant timeout monitor. When the CPTXD signal has been dominant for more than tCPTXDDT the
transmitter is disabled by entering listen-only mode and the bus is released to recessive state. The CPDT
status and CPDTIF interrupt flags are both set.
To re-enable the transmitter, the CPDTIF flag must be cleared. If the CPTXD input is dominant or
dominant timeout status is still active (CPDT=1), the CAN Physical Layer stays in listen-only mode and
CPDTIF is set again after some microseconds to indicate that the attempt has failed. If CPTXD is recessive
and CPDT=0 it takes 1 to 2 s after clearing CPDTIF for returning to normal mode.
The flag is used as an interrupt source to generate a CPI interrupt if the enable bit CPDTIE in CAN
Physical Layer Interrupt Enable Register (CPIE) is set.
21.5.4.3 Over-Current Interrupt
An over- current error is detected if current levels on the CAN bus lines exceed the specified limits while
driving a dominant bit.
The current levels on both lines CANH and CANL are monitored continuously for crossing the thresholds
ICANHOC and ICANLOC, respectively.
A comparator output transition to error level results in setting the corresponding interrupt flag in CAN
Physical Layer Interrupt Flag Register (CPIF).
The flags are the direct interrupt sources of which either of the two can generate a CPI interrupt if the
common enable bit CPOCIE in CAN Physical Layer Interrupt Enable Register (CPIE) is set.
21.6 Initialization/Application Information
21.6.1 Initialization Sequence
Setup for immediate CAN communication:
1. Enable and configure MSCAN
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2. Configure CAN Physical Layer slew rate
3. Enable CAN Physical Layer interrupts
4. Optionally enable SPLIT pin
5. Configure wake-up filter or disable wake-up receiver in case of other wake-up sources
6. Enable CAN Physical Layer to enter normal mode
7. Start CAN communication
21.6.2 Wake-up Mechanism
In stop mode the CAN Physical Layer passes CAN bus states to CPRXD if the wake-up function is enabled
(CPCR[WUPE1:WUPE0]0). In order to wake up the device from stop mode, the wake-up interrupt of
the connected MSCAN module is used.
If CPCR[WUPE1:WUPE0]=b10 the CAN Physical Layer is transparent in stop mode and the MSCAN can
be used with or without its integrated low-pass filter for wake-up. Refer to the MSCAN chapter for details
on configuring and enabling the wake-up function.
For increased robustness against false wake-up, a CAN Physical Layer pulse filter can optionally be
enabled to mask the first (CPCR[WUPE1:WUPE0]=b01) or first two (CPCR[WUPE1:WUPE0]=b11)
wake-up events after entering stop mode. The appropriate number of masked pulses depends on the
individual CAN bus network topology.
Note that the MSCAN can generate a wake-up interrupt immediately after it acknowledges sleep mode
(CANCTL1[SPLAK]=1) whereas the CAN Physical Layer pulse filter takes effect only after entering stop
mode. To avoid a false wake-up in between these two events, the MSCAN low-pass filter should also be
activated (CANCTL1[WUPM]=1). After sleep mode acknowledge the CPU STOP instruction should be
executed before the expiration of tWUP(min) to enable the CAN Physical Layer pulse filter in time.
21.6.3 Bus Error Handling
Upon CAN bus error voltage high failures and over-current events listen-only is entered immediately and
the transmitter is turned off. This mode is maintained as long as voltage failure conditions persist or, in
case of over-current events, application software re-enables the transmit driver by clearing the related
flags.
All high and low voltage levels for both CAN bus lines are continuously reflected in their related voltage
failure status bits. A change in a status bit sets the corresponding flag and generates an interrupt if enabled.
As long as any of the voltage failure high status bits is set, the transmit driver remains off. It will be turned
on again automatically as soon as all voltage failure conditions have disappeared. In case of a voltage
failure low condition on CANL only the CANL driver is disabled. A voltage failure low condition on
CANH has no effect on the transmitter.
Voltage failure errors have informational purpose. If the application detects frequent CAN protocol errors
it is advisable to take the appropriate action. No software action is need to re-enable the transmit driver.
An over-current event on either CAN bus line sets the related flag and turns off the transmit driver. This
error can only be detected while driving the bus dominant. In contrast to the voltage failure the over-current
Chapter 21 CAN Physical Layer (S12CANPHYV3)
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condition instantaneously disappears as soon as the transmit driver is automatically being turned of f. This
state is locked and the application software must account for re-enabling the driver.
The recommended procedure to handle an over-current related bus error is:
1. On interrupt abort any scheduled transmissions
2. Read interrupt flag register to determine over-current source(s)
3. Clear related interrupt flag(s)
4. Retry CAN transmission
5. On interrupt abort any scheduled transmissions
6. Read interrupt flag register to determine over-current source(s)
7. If the same over-current error persists do not retry and run appropriate custom diagnostics
21.6.4 CPTXD-Dominant Timeout Recovery
Recovery from a CPTXD-dominant timeout error is attempted with the following sequence:
1. On CPTXD-dominant timeout interrupt set CPTXD input to recessive state
2. Wait until CPDT clear; exit loop if waiting for longer than 3 s and report malfunction
3. Clear CPDTIF
4. Wait for min. 2 s before attempting new transmission
Chapter 21 CAN Physical Layer (S12CANPHYV3)
MC9S12ZVM Family Reference Manual Rev. 2.2
834 Freescale Semiconductor
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 835
Chapter 22
Pulse-Width Modulator (S12PWM8B8CV2)
22.1 Introduction
The Version 2 of S12 PWM module is a channel scalable and optimized implementation of S12
PWM8B8C Version 1. The channel is scalable in pairs from PWM0 to PWM7 and the available channel
number is 2, 4, 6 and 8. The shutdown feature has been removed and the flexibility to select one of four
clock sources per channel has improved. If the corresponding channels exist and shutdown feature is not
used, the Version 2 is fully software compatible to Version 1.
22.1.1 Features
The scalable PWM block includes these distinctive features:
Up to eight independent PWM channels, scalable in pairs (PWM0 to PWM7)
Available channel number could be 2, 4, 6, 8 (refer to device specification for exact number)
Programmable period and duty cycle for each channel
Dedicated counter for each PWM channel
Programmable PWM enable/disable for each channel
Software selection of PWM duty pulse polarity for each channel
Period and duty cycle are double buffered. Change takes effect when the end of the effective period
is reached (PWM counter reaches zero) or when the channel is disabled.
Programmable center or left aligned outputs on individual channels
Up to eight 8-bit channel or four 16-bit channel PWM resolution
Four clock sources (A, B, SA, and SB) provide for a wide range of frequencies
Programmable clock select logic
22.1.2 Modes of Operation
There is a software programmable option for low power consumption in wait mode that disables the input
clock to the prescaler.
Table 22-1. Revision History
Revision
Number Revision Date Sections
Affected Description of Changes
v02.00 Feb. 20, 2009 All Initial revision of scalable PWM. Started from pwm_8b8c (v01.08).
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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In freeze mode there is a software programmable option to disable the input clock to the prescaler. This is
useful for emulation.
Wait: The prescaler keeps on running, unless PSWAI in PWMCTL is set to 1.
Freeze: The prescaler keeps on running, unless PFRZ in PWMCTL is set to 1.
22.1.3 Block Diagram
Figure 22-1 shows the block diagram for the 8-bit up to 8-channel scalable PWM block.
Figure 22-1. Scalable PWM Block Diagram
22.2 External Signal Description
The scalable PWM module has a selected number of external pins. Refer to device specification for exact
number.
Period and Duty Counter
Channel 6
Clock Select PWM Clock
Period and Duty Counter
Channel 5
Period and Duty Counter
Channel 4
Period and Duty Counter
Channel 3
Period and Duty Counter
Channel 2
Period and Duty Counter
Channel 1
Alignment
Polarity
Control
PWM8B8C
PWM6
PWM5
PWM4
PWM3
PWM2
PWM1
Enable
PWM Channels
Period and Duty Counter
Channel 7
Period and Duty Counter
Channel 0
PWM0
PWM7
Clock
Maximum possible c hanne ls, scalable in pairs from PWM0 to PWM7.
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22.2.1 PWM7 - PWM0 — PWM Channel 7 - 0
Those pins serve as waveform output of PWM channel 7 - 0.
22.3 Memory Map and Register Definition
22.3.1 Module Memory Map
This section describes the content of the registers in the scalable PWM module. The base address of the
scalable PWM module is determined at the MCU level when the MCU is defined. The register decode map
is fixed and begins at the first address of the module address offset. The figure below shows the registers
associated with the scalable PWM and their relative offset from the base address. The register detail
description follows the order they appear in the register map.
Reserved bits within a register will always read as 0 and the write will be unimplemented. Unimplemented
functions are indicated by shading the bit.
NOTE
Register Address = Base Address + Address Offset, where the Base Address
is defined at the MCU level and the Address Of fset is defined at the module
level.
22.3.2 Register Descriptions
This section describes in detail all the registers and register bits in the scalable PWM module.
Register
Name Bit 76 5 4321Bit 0
0x0000
PWME(1) RPWME7 PWME6 PWME5 PWME4 PWME3 PWME2 PWME1 PWME0
W
0x0001
PWMPOL1RPPOL7 PPOL6 PPOL5 PPOL4 PPOL3 PPOL2 PPOL1 PPOL0
W
0x0002
PWMCLK1RPCLK7 PCLKL6 PCLK5 PCLK4 PCLK3 PCLK2 PCLK1 PCLK0
W
0x0003
PWMPRCLK
R0 PCKB2 PCKB1 PCKB0 0PCKA2 PCKA1 PCKA0
W
0x0004
PWMCAE1RCAE7 CAE6 CAE5 CAE4 CAE3 CAE2 CAE1 CAE0
W
0x0005
PWMCTL1RCON67 CON45 CON23 CON01 PSWAI PFRZ 00
W
= Unimplemented or Reserved
Figure 22-2. The scalable PWM Register Summary (Sheet 1 of 4)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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838 Freescale Semiconductor
0x0006
PWMCLKAB
1
R
PCLKAB7 PCLKAB6 PCLKAB5 PCLKAB4 PCLKAB3 PCLKAB2 PCLKAB1 PCLKAB0
W
0x0007
RESERVED
R00 0 00000
W
0x0008
PWMSCLA
RBit 7 6 5 4 3 2 1 Bit 0
W
0x0009
PWMSCLB
RBit 7 6 5 4 3 2 1 Bit 0
W
0x000A
RESERVED
R00 0 00000
W
0x000B
RESERVED
R00 0 00000
W
0x000C
PWMCNT0
(2)
RBit 7 6 5 4 3 2 1 Bit 0
W00 0 00000
0x000D
PWMCNT12RBit 7 6 5 4 3 2 1 Bit 0
W00 0 00000
0x000E
PWMCNT22RBit 7 6 5 4 3 2 1 Bit 0
W00 0 00000
0x000F
PWMCNT32RBit 7 6 5 4 3 2 1 Bit 0
W00 0 00000
0x0010
PWMCNT42RBit 7 6 5 4 3 2 1 Bit 0
W00 0 00000
0x0011
PWMCNT52RBit 7 6 5 4 3 2 1 Bit 0
W00 0 00000
0x0012
PWMCNT62RBit 7 6 5 4 3 2 1 Bit 0
W00 0 00000
0x0013
PWMCNT72RBit 7 6 5 4 3 2 1 Bit 0
W00 0 00000
Register
Name Bit 76 5 4321Bit 0
= Unimplemented or Reserved
Figure 22-2. The scalable PWM Register Summary (Sheet 2 of 4)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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Freescale Semiconductor 839
0x0014
PWMPER02RBit 7 6 5 4 3 2 1 Bit 0
W
0x0015
PWMPER12RBit 7 6 5 4 3 2 1 Bit 0
W
0x0016
PWMPER22RBit 7 6 5 4 3 2 1 Bit 0
W
0x0017
PWMPER32RBit 7 6 5 4 3 2 1 Bit 0
W
0x0018
PWMPER42RBit 7 6 5 4 3 2 1 Bit 0
W
0x0019
PWMPER52RBit 7 6 5 4 3 2 1 Bit 0
W
0x001A
PWMPER62RBit 7 6 5 4 3 2 1 Bit 0
W
0x001B
PWMPER72RBit 7 6 5 4 3 2 1 Bit 0
W
0x001C
PWMDTY02RBit 7 6 5 4 3 2 1 Bit 0
W
0x001D
PWMDTY12RBit 7 6 5 4 3 2 1 Bit 0
W
0x001E
PWMDTY22RBit 7 6 5 4 3 2 1 Bit 0
W
0x001F
PWMDTY32RBit 7 6 5 4 3 2 1 Bit 0
W
0x0010
PWMDTY42RBit 7 6 5 4 3 2 1 Bit 0
W
0x0021
PWMDTY52RBit 7 6 5 4 3 2 1 Bit 0
W
0x0022
PWMDTY62RBit 7 6 5 4 3 2 1 Bit 0
W
Register
Name Bit 76 5 4321Bit 0
= Unimplemented or Reserved
Figure 22-2. The scalable PWM Register Summary (Sheet 3 of 4)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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840 Freescale Semiconductor
22.3.2.1 PWM Enable Register (PWME)
Each PWM channel has an enable bit (PWMEx) to start its waveform output. When any of the PWMEx
bits are set (PWMEx = 1), the associated PWM output is enabled imme diately. However , the actual PWM
waveform is not available on the associated PWM output until its clock source begins its next cycle due
to the synchronization of PWMEx and the clock source.
NOTE
The first PWM cycle after enabling the channel can be irregular.
An exception to this is when channels are concatenated. Once concatenated mode is enabled (CONxx bits
set in PWMCTL register), enabling/disabling the corresponding 16-bit PWM channel is controlled by the
low order PWMEx bit. In this case, the high order bytes PWMEx bits have no effect and their
corresponding PWM output lines are disabled.
While in run mode, if all existing PWM channels are disabled (PWMEx–0 = 0), the prescaler counter shuts
off for power savings.
Read: Anytime
Write: Anytime
0x0023
PWMDTY72RBit 7 6 5 4 3 2 1 Bit 0
W
0x0024
RESERVED
R00 0 00000
W
0x0025
RESERVED
R00 0 00000
W
0x0026
RESERVED
R00 0 00000
W
0x0027
RESERVED
R00 0 00000
W
1. The related bit is available only if corresponding channel exists.
2. The register is available only if corresponding channel exists.
Module Base + 0x0000
76543210
RPWME7 PWME6 PWME5 PWME4 PWME3 PWME2 PWME1 PWME0
W
Reset00000000
Figure 22-3. PWM Enable Register (PWME)
Register
Name Bit 76 5 4321Bit 0
= Unimplemented or Reserved
Figure 22-2. The scalable PWM Register Summary (Sheet 4 of 4)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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22.3.2.2 PWM Polarity Register (PWMPOL)
The starting polarity of each PWM channel waveform is determined by the associated PPOLx bit in the
PWMPOL register. If the polarity bit is one, the PWM channel output is high at the beginning of the cycle
and then goes low when the duty count is reached. Conversely, if the polarity bit is zero, the output starts
low and then goes high when the duty count is reached.
Table 22-2. PWME Field Descriptions
Note: Bits related to available channels have functional significance. Writing to unavailable bits has no effect. Read from
unavailable bits return a zero
Field Description
7
PWME7
Pulse Width Channel 7 Enable
0 Pulse width channel 7 is disabled.
1 Pulse width channel 7 is enabled. The pulse modulated signal becomes available at PWM output bit 7 when
its clock source begins its next cycle.
6
PWME6
Pulse Width Channel 6 Enable
0 Pulse width channel 6 is disabled.
1 Pulse width channel 6 is enabled. The pulse modulated signal becomes available at PWM output bit 6 when
its clock source begins its next cycle. If CON67=1, then bit has no effect and PWM output line 6 is disabled.
5
PWME5
Pulse Width Channel 5 Enable
0 Pulse width channel 5 is disabled.
1 Pulse width channel 5 is enabled. The pulse modulated signal becomes available at PWM output bit 5 when
its clock source begins its next cycle.
4
PWME4
Pulse Width Channel 4 Enable
0 Pulse width channel 4 is disabled.
1 Pulse width channel 4 is enabled. The pulse modulated signal becomes available at PWM, output bit 4 when
its clock source begins its next cycle. If CON45 = 1, then bit has no effect and PWM output line 4 is disabled.
3
PWME3
Pulse Width Channel 3 Enable
0 Pulse width channel 3 is disabled.
1 Pulse width channel 3 is enabled. The pulse modulated signal becomes available at PWM, output bit 3 when
its clock source begins its next cycle.
2
PWME2
Pulse Width Channel 2 Enable
0 Pulse width channel 2 is disabled.
1 Pulse width channel 2 is enabled. The pulse modulated signal becomes available at PWM, output bit 2 when
its clock source begins its next cycle. If CON23 = 1, then bit has no effect and PWM output line 2 is disabled.
1
PWME1
Pulse Width Channel 1 Enable
0 Pulse width channel 1 is disabled.
1 Pulse width channel 1 is enabled. The pulse modulated signal becomes available at PWM, output bit 1 when
its clock source begins its next cycle.
0
PWME0
Pulse Width Channel 0 Enable
0 Pulse width channel 0 is disabled.
1 Pulse width channel 0 is enabled. The pulse modulated signal becomes available at PWM, output bit 0 when
its clock source begins its next cycle. If CON01 = 1, then bit has no effect and PWM output line 0 is disabled.
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
842 Freescale Semiconductor
Read: Anytime
Write: Anytime
NOTE
PPOLx register bits can be written anytime. If the polarity is changed while
a PWM signal is being generated, a truncated or stretched pulse can occur
during the transition
22.3.2.3 PWM Clock Select Register (PWMCLK)
Each PWM channel has a choice of four clocks to use as the clock source for that channel as described
below.
Read: Anytime
Write: Anytime
NOTE
Register bits PCLK0 to PCLK7 can be written anytime. If a clock select is
changed while a PWM signal is being generated, a truncated or stretched
pulse can occur during the transition.
Module Base + 0x0001
76543210
RPPOL7 PPOL6 PPOL5 PPOL4 PPOL3 PPOL2 PPOL1 PPOL0
W
Reset00000000
Figure 22-4. PWM Polarity Register (PWMPOL)
Table 22-3. PWMPOL Field Descriptions
Note: Bits related to available channels have functional significance. Writing to unavailable bits has no effect. Read from
unavailable bits return a zero
Field Description
7–0
PPOL[7:0]
Pulse Width Channel 7–0 Polarity Bits
0 PWM channel 7–0 outputs are low at the beginning of the period, then go high when the duty count is reached.
1 PWM channel 7–0 outputs are high at the beginning of the period, then go low when the duty count is reached.
Module Base + 0x0002
76543210
RPCLK7 PCLKL6 PCLK5 PCLK4 PCLK3 PCLK2 PCLK1 PCLK0
W
Reset00000000
Figure 22-5. PWM Clock Select Register (PWMCLK)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 843
The clock source of each PWM channel is determined by PCLKx bits in PWMCLK and PCLKABx bits
in PWMCLKAB (see Section 22.3.2.7, “PWM Clock A/B Select Register (PWMCLKAB)). For Channel
0, 1, 4, 5, the selection is shown in Table 22-5; For Channel 2, 3, 6, 7, the selection is shown in Table 22-6.
Table 22-5. PWM Channel 0, 1, 4, 5 Clock Source Selection
Table 22-6. PWM Channel 2, 3, 6, 7 Clock Source Selection
22.3.2.4 PWM Prescale Clock Select Register (PWMPRCLK)
This register selects the prescale clock source for clocks A and B independently.
Read: Anytime
Write: Anytime
NOTE
PCKB2–0 and PCKA2–0 register bits can be written anytime. If the clock
pre-scale is changed while a PWM signal is being generated, a truncated or
stretched pulse can occur during the transition.
Table 22-4. PWMCLK Field Descriptions
Note: Bits related to available channels have functional significance. Writing to unavailable bits has no effect. Read from
unavailable bits return a zero
Field Description
7-0
PCLK[7:0]
Pulse Width Channel 7-0 Clock Select
0 Clock A or B is the clock source for PWM channel 7-0, as shown in Table 22-5 and Table 22-6.
1 Clock SA or SB is the clock source for PWM channel 7-0, as shown in Table 22-5 and Table 22-6.
PCLKAB[0,1,4,5] PCLK[0,1 ,4,5] Clock Source Selection
0 0 Clock A
0 1 Clock SA
1 0 Clock B
1 1 Clock SB
PCLKAB[2,3,6,7] PCLK[2,3,6 ,7] Clock Source Selection
0 0 Clock B
0 1 Clock SB
1 0 Clock A
1 1 Clock SA
Module Base + 0x0003
76543210
R0 PCKB2 PCKB1 PCKB0 0PCKA2 PCKA1 PCKA0
W
Reset00000000
= Unimplemented or Reserved
Figure 22-6. PWM Prescale Clock Select Register (PWMPRCLK)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
844 Freescale Semiconductor
s
22.3.2.5 PWM Center Align Enable Register (PWMCAE)
The PWMCAE register contains eight control bits for the selection of center aligned outputs or left aligned
outputs for each PWM channel. If the CAEx bit is set to a one, the corresponding PWM output will be
center aligned. If the CAEx bit is cleared, the corresponding PWM output will be left aligned. See
Section 22.4.2.5, “Left Aligned Outputs” and Section 22.4.2.6, “Center Aligned Outputs” for a more
detailed description of the PWM output modes.
Read: Anytime
Write: Anytime
NOTE
Write these bits only when the corresponding channel is disabled.
Table 22-7. PWMPRCLK Field Descriptions
Field Description
6–4
PCKB[2:0]
Prescaler Select for Clock BClock B is one of two clock sources which can be used for all channels. These
three bits determine the rate of clock B, as shown in Table 22-8.
2–0
PCKA[2:0]
Prescaler Select for Clock AClock A is one of two clock sources which can be used for all channels. These
three bits determine the rate of clock A, as shown in Table 22-8.
Table 22-8. Clock A or Clock B Prescaler Selects
PCKA/B2 PCKA/B1 PCKA/B0 Value of Clock A/B
0 0 0 bus clock
0 0 1 bus clock / 2
0 1 0 bus clock / 4
0 1 1 bus clock / 8
1 0 0 bus clock / 16
1 0 1 bus clock / 32
1 1 0 bus clock / 64
1 1 1 bus clock / 128
Module Base + 0x0004
76543210
RCAE7 CAE6 CAE5 CAE4 CAE3 CAE2 CAE1 CAE0
W
Reset00000000
Figure 22-7. PWM Center Align Enable Register (PWMCAE)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 845
22.3.2.6 PWM Control Register (PWMCTL)
The PWMCTL register provides for various control of the PWM module.
Read: Anytime
Write: Anytime
There are up to four control bits for concatenation, each of which is used to concatenate a pair of PWM
channels into one 16-bit channel. If the corresponding channels do not exist on a particular derivative, then
writes to these bits have no effect and reads will return zeroes. When channels 6 and 7are concatenated,
channel 6 registers become the high order bytes of the double byte channel. When channels 4 and 5 are
concatenated, channel 4 registers become the high order bytes of the double byte channel. When channels
2 and 3 are concatenated, channel 2 registers become the high order bytes of the double byte channel.
When channels 0 and 1 are concatenated, channel 0 registers become the high order bytes of the double
byte channel.
See Section 22.4.2.7, “PWM 16-Bit Functions” for a more detailed description of the concatenation PWM
Function.
NOTE
Change these bits only when both corresponding channels are disabled.
Table 22-9. PWMCAE Field Descriptions
Note: Bits related to available channels have functional significance. Writing to unavailable bits has no effect. Read from
unavailable bits return a zero
Field Description
7–0
CAE[7:0]
Center Aligned Output Modes on Channels 7–0
0 Channels 7–0 operate in left aligned output mode.
1 Channels 7–0 operate in center aligned output mode.
Module Base + 0x0005
76543210
RCON67 CON45 CON23 CON01 PSWAI PFRZ 00
W
Reset00000000
= Unimplemented or Reserved
Figure 22-8. PWM Control Register (PWMCTL)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
846 Freescale Semiconductor
22.3.2.7 PWM Clock A/B Select Register (PWMCLKAB)
Each PWM channel has a choice of four clocks to use as the clock source for that channel as described
below.
Table 22-10. PWMCTL Field Descriptions
Note: Bits related to available channels have functional significance. Writing to unavailable bits has no effect. Read from
unavailable bits return a zero
Field Description
7
CON67
Concatenate Channels 6 and 7
0 Channels 6 and 7 are separate 8-bit PWMs.
1 Channels 6 and 7 are concatenated to create one 16-bit PWM channel. Channel 6 becomes the high order
byte and channel 7 becomes the low order byte. Channel 7 output pin is used as the output for this 16-bit
PWM (bit 7 of port PWMP). Channel 7 clock select control-bit determines the clock source, channel 7 polarity
bit determines the polarity, channel 7 enable bit enables the output and channel 7 center aligned enable bit
determines the output mode.
6
CON45
Concatenate Channels 4 and 5
0 Channels 4 and 5 are separate 8-bit PWMs.
1 Channels 4 and 5 are concatenated to create one 16-bit PWM channel. Channel 4 becomes the high order
byte and channel 5 becomes the low order byte. Channel 5 output pin is used as the output for this 16-bit
PWM (bit 5 of port PWMP). Channel 5 clock select control-bit determines the clock source, channel 5 polarity
bit determines the polarity, channel 5 enable bit enables the output and channel 5 center aligned enable bit
determines the output mode.
5
CON23
Concatenate Channels 2 and 3
0 Channels 2 and 3 are separate 8-bit PWMs.
1 Channels 2 and 3 are concatenated to create one 16-bit PWM channel. Channel 2 becomes the high order
byte and channel 3 becomes the low order byte. Channel 3 output pin is used as the output for this 16-bit
PWM (bit 3 of port PWMP). Channel 3 clock select control-bit determines the clock source, channel 3 polarity
bit determines the polarity, channel 3 enable bit enables the output and channel 3 center aligned enable bit
determines the output mode.
4
CON01
Concatenate Channels 0 and 1
0 Channels 0 and 1 are separate 8-bit PWMs.
1 Channels 0 and 1 are concatenated to create one 16-bit PWM channel. Channel 0 becomes the high order
byte and channel 1 becomes the low order byte. Channel 1 output pin is used as the output for this 16-bit
PWM (bit 1 of port PWMP). Channel 1 clock select control-bit determines the clock source, channel 1 polarity
bit determines the polarity, channel 1 enable bit enables the output and channel 1 center aligned enable bit
determines the output mode.
3
PSWAI
PWM Stops in Wait Mode — Enabling this bit allows for lower power consumption in wait mode by disabling
the input clock to the prescaler.
0 Allow the clock to the prescaler to continue while in wait mode.
1 Stop the input clock to the prescaler whenever the MCU is in wait mode.
2
PFRZ
PWM Counters Stop in Freeze Mode — In freeze mode, there is an option to disable the input clock to the
prescaler by setting the PFRZ bit in the PWMCTL register. If this bit is set, whenever the MCU is in freeze mode,
the input clock to the prescaler is disabled. This feature is useful during emulation as it allows the PWM function
to be suspended. In this way, the counters of the PWM can be stopped while in freeze mode so that once normal
program flow is continued, the counters are re-enabled to simulate real-time operations. Since the registers can
still be accessed in this mode, to re-enable the prescaler clock, either disable the PFRZ bit or exit freeze mode.
0 Allow PWM to continue while in freeze mode.
1 Disable PWM input clock to the prescaler whenever the part is in freeze mode. This is useful for emulation.
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 847
Read: Anytime
Write: Anytime
NOTE
Register bits PCLKAB0 to PCLKAB7 can be written anytime. If a clock
select is changed while a PWM signal is being generated, a truncated or
stretched pulse can occur during the transition.
Module Base + 0x00006
76543210
RPCLKAB7 PCLKAB6 PCLKAB5 PCLKAB4 PCLKAB3 PCLKAB2 PCLKAB1 PCLKAB0
W
Reset00000000
Figure 22-9. PWM Clock Select Register (PWMCLK)
Table 22-11. PWMCLK Field Descriptions
Note: Bits related to available channels have functional significance. Writing to unavailable bits has no effect. Read from
unavailable bits return a zero
Field Description
7
PCLKAB7
Pulse Width Channel 7 Clock A/B Select
0 Clock B or SB is the clock source for PWM channel 7, as shown in Table 22-6.
1 Clock A or SA is the clock source for PWM channel 7, as shown in Table 22-6.
6
PCLKAB6
Pulse Width Channel 6 Clock A/B Select
0 Clock B or SB is the clock source for PWM channel 6, as shown in Table 22-6.
1 Clock A or SA is the clock source for PWM channel 6, as shown in Table 22-6.
5
PCLKAB5
Pulse Width Channel 5 Clock A/B Select
0 Clock A or SA is the clock source for PWM channel 5, as shown in Table 22-5.
1 Clock B or SB is the clock source for PWM channel 5, as shown in Table 22-5.
4
PCLKAB4
Pulse Width Channel 4 Clock A/B Select
0 Clock A or SA is the clock source for PWM channel 4, as shown in Table 22-5.
1 Clock B or SB is the clock source for PWM channel 4, as shown in Table 22-5.
3
PCLKAB3
Pulse Width Channel 3 Clock A/B Select
0 Clock B or SB is the clock source for PWM channel 3, as shown in Table 22-6.
1 Clock A or SA is the clock source for PWM channel 3, as shown in Table 22-6.
2
PCLKAB2
Pulse Width Channel 2 Clock A/B Select
0 Clock B or SB is the clock source for PWM channel 2, as shown in Table 22-6.
1 Clock A or SA is the clock source for PWM channel 2, as shown in Table 22-6.
1
PCLKAB1
Pulse Width Channel 1 Clock A/B Select
0 Clock A or SA is the clock source for PWM channel 1, as shown in Table 22-5.
1 Clock B or SB is the clock source for PWM channel 1, as shown in Table 22-5.
0
PCLKAB0
Pulse Width Channel 0 Clock A/B Select
0 Clock A or SA is the clock source for PWM channel 0, as shown in Table 22-5.
1 Clock B or SB is the clock source for PWM channel 0, as shown in Table 22-5.
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
848 Freescale Semiconductor
The clock source of each PWM channel is determined by PCLKx bits in PWMCLK (see Section 22.3.2.3,
“PWM Clock Select Register (PWMCLK)) and PCLKABx bits in PWMCLKAB as shown in Table 22-5
and Table 22-6.
22.3.2.8 PWM Scale A Register (PWMSCLA)
PWMSCLA is the programmable scale value used in scaling clock A to generate clock SA. Clock SA is
generated by taking clock A, dividing it by the value in the PWMSCLA register and dividing that by two.
Clock SA = Clock A / (2 * PWMSCLA)
NOTE
When PWMSCLA = $00, PWMSCLA value is considered a full scale value
of 256. Clock A is thus divided by 512.
Any value written to this register will cause the scale counter to load the new scale value (PWMSCLA).
Read: Anytime
Write: Anytime (causes the scale counter to load the PWMSCLA value)
22.3.2.9 PWM Scale B Register (PWMSCLB)
PWMSCLB is the programmable scale value used in scaling clock B to generate clock SB. Clock SB is
generated by taking clock B, dividing it by the value in the PWMSCLB register and dividing that by two.
Clock SB = Clock B / (2 * PWMSCLB)
NOTE
When PWMSCLB = $00, PWMSCLB value is considered a full scale value
of 256. Clock B is thus divided by 512.
Any value written to this register will cause the scale counter to load the new scale value (PWMSCLB).
Read: Anytime
Write: Anytime (causes the scale counter to load the PWMSCLB value).
Module Base + 0x0008
76543210
RBit 7 6 5 4 3 2 1 Bit 0
W
Reset00000000
Figure 22-10. PWM Scale A Register (PWMSCLA)
Module Base + 0x0009
76543210
RBit 7 6 5 4 3 2 1 Bit 0
W
Reset00000000
Figure 22-11. PWM Scale B Register (PWMSCLB)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 849
22.3.2.10 PWM Channel Counter Registers (PWMCNTx)
Each channel has a dedicated 8-bit up/down counter which runs at the rate of the selected clock source.
The counter can be read at any time without affecting the count or the operation of the PWM channel. In
left aligned output mode, the counter counts from 0 to the value in the period register - 1. In center aligned
output mode, the counter counts from 0 up to the value in the period register and then back down to 0.
Any value written to the counter causes the counter to reset to $00, the counter direction to be set to up,
the immediate load of both duty and period registers with values from the buffers, and the output to change
according to the polarity bit. The counter is also cleared at the end of the effective period (see
Section 22.4.2.5, “Left Aligned Outputs” and Section 22.4.2.6, “Center Aligned Outputs” for more
details). When the channel is disabled (PWMEx = 0), the PWMCNTx register does not count. When a
channel becomes enabled (PWMEx = 1), the associated PWM counter starts at the count in the
PWMCNTx register. For more detailed information on the operation of the counters, see Section 22.4.2.4,
“PWM Timer Counters”.
In concatenated mode, writes to the 16-bit counter by using a 16-bit access or writes to either the low or
high order byte of the counter will reset the 16-bit counter. Reads of the 16-bit counter must be made by
16-bit access to maintain data coherency.
NOTE
Writing to the counter while the channel is enabled can cause an irregular
PWM cycle to occur.
1This register is available only when the corresponding channel exists and is reserved if that channel does not exist. Writes to
a reserved register have no functional effect. Reads from a reserved register return zeroes.
Read: Anytime
Write: Anytime (any value written causes PWM counter to be reset to $00).
22.3.2.11 PWM Channel Period Registers (PWMPERx)
There is a dedicated period register for each channel. The value in this register determines the period of
the associated PWM channel.
The period registers for each channel are double buffered so that if they change while the channel is
enabled, the change will NOT take effect until one of the following occurs:
The effective period ends
Module Base + 0x000C = PWMCNT0, 0x000D = PWMCNT1, 0x000E = PWMCNT2, 0x000F = PWMCNT3
Module Base + 0x0010 = PWMCNT4, 0x0011 = PWMCNT5, 0x0012 = PWMCNT6, 0x0013 = PWMCNT7
76543210
RBit 7 6 5 4 3 2 1 Bit 0
W00000000
Reset00000000
Figure 22-12. PWM Channel Counter Registers (PWMCNTx)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
850 Freescale Semiconductor
The counter is written (counter resets to $00)
The channel is disabled
In this way , the output of the PWM will always be either the old waveform or the new waveform, not some
variation in betwee n. If the channel is not enable d, then writes to the period register will go directly to the
latches as well as the buffer.
NOTE
Reads of this register return the most recent value written. Reads do not
necessarily return the value of the currently active period due to the double
buffering scheme.
See Section 22.4.2.3, “PWM Period and Duty” for more information.
To calculate the output period, take the selected clock source period for the channel of interest (A, B, SA,
or SB) and multiply it by the value in the period register for that channel:
Left aligned output (CAEx = 0)
PWMx Period = Channel Clock Period * PWMPERx
Center Aligned Output (CAEx = 1)
PWMx Period = Channel Clock Period * (2 * PWMPERx)
For boundary case programming values, please refer to Section 22.4.2.8, “PWM Boundary Cases”.
1This register is available only when the corresponding channel exists and is reserved if that channel does not exist. Writes to
a reserved register have no functional effect. Reads from a reserved register return zeroes.
Read: Anytime
Write: Anytime
22.3.2.12 PWM Channel Duty Registers (PWMDTYx)
There is a dedicated duty register for each channel. The value in this register determines the duty of the
associated PWM channel. The duty value is compared to the counter and if it is equal to the counter value
a match occurs and the output changes state.
The duty registers for each channel are double buffered so that if they change while the channel is enabled,
the change will NOT take effect until one of the following occurs:
The effective period ends
The counter is written (counter resets to $00)
Module Base + 0x0014 = PWMPER0, 0x0015 = PWMPER1, 0x0016 = PWMPER2, 0x0017 = PWMPER3
Module Base + 0x0018 = PWMPER4, 0x0019 = PWMPER5, 0x001A = PWMPER6, 0x001B = PWMPER7
76543210
RBit 7 6 5 4 3 2 1 Bit 0
W
Reset11111111
Figure 22-13. PWM Channel Period Registers (PWMPERx)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 851
The channel is disabled
In this way , the output of the PWM will always be either the old duty waveform or the new duty waveform,
not some variation in between. If the channel is not enabled, then writes to the duty register will go directly
to the latches as well as the buffer.
NOTE
Reads of this register return the most recent value written. Reads do not
necessarily return the value of the currently active duty due to the double
buffering scheme.
See Section 22.4.2.3, “PWM Period and Duty” for more information.
NOTE
Depending on the polarity bit, the duty registers will contain the count of
either the high time or the low time. If the polarity bit is one, the output starts
high and then goes low when the duty count is reached, so the duty registers
contain a count of the high time. If the polarity bit is zero, the output starts
low and then goes high when the duty count is reached, so the duty registers
contain a count of the low time.
To calculate the output duty cycle (high time as a% of period) for a particular channel:
Polarity = 0 (PPOL x =0)
Duty Cycle = [(PWMPERx-PWMDTYx)/PWMPERx] * 100%
Polarity = 1 (PPOLx = 1)
Duty Cycle = [PWMDTYx / PWMPERx] * 100%
For boundary case programming values, please refer to Section 22.4.2.8, “PWM Boundary Cases”.
1This register is available only when the corresponding channel exists and is reserved if that channel does not exist. Writes to
a reserved register have no functional effect. Reads from a reserved register return zeroes.
Read: Anytime
Write: Anytime
Module Base + 0x001C = PWMDTY0, 0x001D = PWMDTY1, 0x001E = PWMDTY2, 0x001F = PWMDTY3
Module Base + 0x0020 = PWMDTY4, 0x0021 = PWMDTY5, 0x0022 = PWMDTY6, 0x0023 = PWMDTY7
76543210
RBit 7 6 5 4 3 2 1 Bit 0
W
Reset11111111
Figure 22-14. PWM Channel Duty Registers (PWMDTYx)
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
852 Freescale Semiconductor
22.4 Functional Description
22.4.1 PWM Clock Select
There are four available clocks: clock A, clock B, clock SA (scaled A), and clock SB (scaled B). These
four clocks are based on the bus clock.
Clock A and B can be software selected to be 1, 1/2, 1/4, 1/8,..., 1/64, 1/128 times the bus clock. Clock SA
uses clock A as an input and divides it further with a reloadable counter. Similarly, clock SB uses clock B
as an input and divides it further with a reloadable counter. The rates available for clock SA are software
selectable to be clock A divided by 2, 4, 6, 8,..., or 512 in increments of divide by 2. Similar rates are
available for clock SB. Each PWM channel has the capability of selecting one of four clocks, clock A,
Clock B, clock SA or clock SB.
The block diagram in Figure 22-15 shows the four different clocks and how the scaled clocks are created.
22.4.1.1 Prescale
The input clock to the PWM prescaler is the bus clock. It can be disabled whenever the part is in freeze
mode by setting the PFRZ bit in the PWMCTL register. If this bit is set, whenever the MCU is in freeze
mode (freeze mode signal active) the input clock to the prescaler is disabled. This is useful for emulation
in order to freeze the PWM. The input clock can also be disabled when all available PWM channels are
disabled (PWMEx-0 = 0). This is useful for reducing power by disabling the prescale counter.
Clock A and clock B are scaled values of the input clock. The value is software selectable for both clock
A and clock B and has options of 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, or 1/128 times the bus clock. The value
selected for clock A is dete rmined by the PCKA2, PCKA1, PCKA0 bits in the PWMPRCLK register . The
value selected for clock B is determined by the PCKB2, PCKB1, PCKB0 bits also in the PWMPRCLK
register.
22.4.1.2 Clock Scale
The scaled A clock uses clock A as an input and divides it further with a user programmable value and
then divides this by 2. The scaled B clock uses clock B as an input and divides it further with a user
programmable value and then divides this by 2. The rates available for clock SA are software selectable
to be clock A divided by 2, 4, 6, 8,..., or 512 in increments of divide by 2. Similar rates are available for
clock SB.
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 853
Figure 22-15. PWM Clock Select Block Diagram
128248163264
PCKB2
PCKB1
PCKB0
M
U
X
Clock A
Clock B
Clock SA
Clock A/2, A/4, A/6,....A/512
Prescale Scale
Divide by
PFRZ
Freeze Mode Signal
Clock
Clock Select
M
U
X
Clock to
PWM Ch 0
M
U
X
Clock to
PWM Ch 2
M
U
X
Clock to
PWM Ch 1
M
U
X
Clock to
PWM Ch 4
M
U
X
Clock to
PWM Ch 5
M
U
X
Clock to
PWM Ch 6
M
U
X
Clock to
PWM Ch 7
M
U
X
Clock to
PWM Ch 3
Load
DIV 2PWMSCLB Clock SB
Clock B/2, B/4, B/6,....B/512
M
U
X
PCKA2
PCKA1
PCKA0
PWME7-0
Count = 1
Load
DIV 2PWMSCLA
Count = 1
8-Bit Down
Counter
8-Bit Down
Counter
Prescaler Taps:
Maximum possible channels, scalable in pairs from PW M0 to PWM7.
PCLK0 PCLKAB0
PCLK1 PCLKAB1
PCLK7 PCLKAB7
PCLK6 PCLKAB6
PCLK5 PCLKAB5
PCLK4 PCLKAB4
PCLK3 PCLKAB3
PCLK2 PCLKAB2
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
854 Freescale Semiconductor
Clock A is used as an input to an 8-bit down counter. This down counter loads a user programmable scale
value from the scale register (PWMSCLA). When the down counter reaches one, a pulse is output and the
8-bit counter is re-loaded. The output signal from this circuit is further divided by two. This gives a greater
range with only a slight reduction in granularity. Clock SA equals clock A divided by two times the value
in the PWMSCLA register.
NOTE
Clock SA = Clock A / (2 * PWMSCLA)
When PWMSCLA = $00, PWMSCLA value is considered a full scale value
of 256. Clock A is thus divided by 512.
Similarly , clock B is used as an input to an 8-bit down counter followed by a divide by two producing clock
SB. Thus, clock SB equals clock B divided by two times the value in the PWMSCLB register.
NOTE
Clock SB = Clock B / (2 * PWMSCLB)
When PWMSCLB = $00, PWMSCLB value is considered a full scale value
of 256. Clock B is thus divided by 512.
As an example, consider the case in which the user writes $FF into the PWMSCLA register. Clock A for
this case will be bus clock divided by 4. A pulse will occur at a rate of once every 255x4 bus cycles. Passing
this through the divide by two circuit produces a clock signal at an bus clock divided by 2040 rate.
Similarly, a value of $01 in the PWMSCLA register when clock A is bus clock divided by 4 will produce
a clock at an bus clock divided by 8 rate.
Writing to PWMSCLA or PWMSCLB causes the associated 8-bit down counter to be re-loaded.
Otherwise, when changing rates the counter would have to count down to $01 before counting at the proper
rate. Forcing the associated counter to re-load the scale register value every time PWMSCLA or
PWMSCLB is written prevents this.
NOTE
Writing to the scale registers while channels are operating can cause
irregularities in the PWM outputs.
22.4.1.3 Clock Select
Each PWM channel has the capability of selecting one of four clocks, clock A, clock SA, clock B or clock
SB. The clock selection is done with the PCLKx control bits in the PWMCLK register and PCLKABx
control bits in PWMCLKAB register. For backward compatibility consideration, the reset value of
PWMCLK and PWMCLKAB configures following default clock selection.
For channels 0, 1, 4, and 5 the clock choices are clock A.
For channels 2, 3, 6, and 7 the clock choices are clock B.
NOTE
Changing clock control bits while channels are operating can cause
irregularities in the PWM outputs.
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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22.4.2 PWM Channel Timers
The main part of the PWM module are the actual timers. Each of the timer channels has a counter , a period
register and a duty register (each are 8-bit). The wavefo rm output period is controlled by a match between
the period register and the value in the counter. The duty is controlled by a match between the duty register
and the counter value and causes the state of the output to change during the period. The starting polarity
of the output is also selectable on a per channel basis. Shown below in Figure 22-16 is the block diagram
for the PWM timer.
Figure 22-16. PWM Timer Channel Block Diagram
22.4.2.1 PWM Enable
Each PWM channel has an enable bit (PWMEx) to start its waveform output. When any of the PWMEx
bits are set (PWMEx = 1), the associated PWM output signal is enabled immediately. However , the actual
PWM waveform is not available on the associated PWM output until its clock source begins its next cycle
due to the synchronization of PWMEx and the clock source. An exception to this is when channels are
concatenated. Refer to Section 22.4.2.7, “PWM 16-Bit Functions” for more detail.
NOTE
The first PWM cycle after enabling the channel can be irregular.
Clock Source
T
R
Q
Q
PPOLx
From Port PWMP
Data Register
PWMEx
To P in
Driver
Gate
8-bit Compare =
PWMDTYx
8-bit Compare =
PWMPERx
CAEx
T
R
Q
Q
8-Bit Counter
PWMCNTx
M
U
X
M
U
X
(Clock Edge
Sync)
Up/Down Reset
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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856 Freescale Semiconductor
On the front end of the PWM timer , the clock is enabled to the PWM circuit by the PWMEx bit being high.
There is an edge-synchronizing circuit to guarantee that the clock will only be enabled or disabled at an
edge. When the channel is disabled (PWMEx = 0), the counter for the channel does not count.
22.4.2.2 PWM Polarity
Each channel has a polarity bit to allow starting a waveform cycle with a high or low signal. This is shown
on the block diagram Figure 22-16 as a mux select of either the Q output or the Q output of the PWM
output flip flop. When one of the bits in the PWMPOL register is set, the associated PWM channel output
is high at the beginning of the waveform, then goes low when the duty count is reached. Conversely, if the
polarity bit is zero, the output starts low and then goes high when the duty count is reached.
22.4.2.3 PWM Period and Duty
Dedicated period and duty registers exist for each channel and are double buffered so that if they change
while the channel is enabled, the change will NOT take effect until one of the following occurs:
The effective period ends
The counter is written (counter resets to $00)
The channel is disabled
In this way , the output of the PWM will always be either the old waveform or the new waveform, not some
variation in between. If the channel is not enabled, then writes to the period and duty registers will go
directly to the latches as well as the buffer.
A change in duty or period can be forced into effect “immediately” by writing the new value to the duty
and/or period registers and then writing to the counter. This forces the counter to reset and the new duty
and/or period values to be latched. In addition, since the counter is readable, it is possible to know where
the count is with respect to the duty value and software can be used to make adjustments
NOTE
When forcing a new period or duty into effect immediately, an irregular
PWM cycle can occur.
Depending on the polarity bit, the duty registers will contain the count of
either the high time or the low time.
22.4.2.4 PWM Timer Counters
Each channel has a dedicated 8-bit up/down counter which runs at the rate of the selected clock source (see
Section 22.4.1, “PWM Clock Select” for the available clock sources and rates). The counter compares to
two registers, a duty register and a period register as shown in Figure 22-16. When the PWM counter
matches the duty register, the output flip-flop changes state, causing the PWM waveform to also change
state. A match between the PWM counter and the period register behaves differently depending on what
output mode is selected as shown in Figure 22-16 and described in Section 22.4.2.5, “Left Aligned
Outputs” and Section 22.4.2.6, “Center Aligned Outputs”.
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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Freescale Semiconductor 857
Each channel counter can be read at anytime without affecting the count or the operation of the PWM
channel.
Any value written to the counter causes the counter to reset to $00, the counter direction to be set to up,
the immediate load of both duty and period registers with values from the buffers, and the output to change
according to the polarity bit. When the channel is disabled (PWMEx = 0), the counter stops. When a
channel becomes enabled (PWMEx = 1), the associated PWM counter continues from the count in the
PWMCNTx register. This allows the waveform to continue where it left off when the channel is re-
enabled. When the channel is disabled, writing “0” to the period register will cause the counter to reset on
the next selected clock.
NOTE
If the user wants to start a new “clean” PWM waveform without any
“history” from the old waveform, the user must write to channel counter
(PWMCNTx) prior to enabling the PWM channel (PWMEx = 1).
Generally, writes to the counter are done prior to enabling a channel in order to start from a known state.
However, writing a counter can also be done while the PWM channel is enabled (counting). The effect is
similar to writing the counter when the channel is disabled, except that the new period is started
immediately with the output set according to the polarity bit.
NOTE
Writing to the counter while the channel is enabled can cause an irregular
PWM cycle to occur.
The counter is cleared at the end of the ef fective period (see Section 22.4.2.5, “Left Aligned Outputs” and
Section 22.4.2.6, “Center Aligned Outputs” for more details).
22.4.2.5 Left Aligned Outputs
The PWM timer provides the choice of two types of outputs, left aligned or center aligned. They are
selected with the CAEx bits in the PWMCAE register. If the CAEx bit is cleared (CAEx = 0), the
corresponding PWM output will be left aligned.
In left aligned output mode, the 8-bit counter is configured as an up counter only. It compares to two
registers, a duty register and a period register as shown in the block diagram in Figure 22-16. When the
PWM counter matches the duty register the output flip-flop changes state causing the PWM waveform to
also change state. A match between the PWM counter and the period register resets the counter and the
output flip-flop, as shown in Figure 22-16, as well as performing a load from the double buf fer period and
duty register to the associated registers, as described in Section 22.4.2.3, “PWM Period and Duty”. The
counter counts from 0 to the value in the period register – 1.
Table 22-12. PWM Timer Counter Conditions
Counter Clears ($00) Counter Counts Counter Stops
When PWMCNTx register written to
any value
When PWM channel is enabled
(PWMEx = 1). Counts from last value in
PWMCNTx.
When PWM channel is disabled
(PWMEx = 0)
Effective period ends
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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858 Freescale Semiconductor
NOTE
Changing the PWM output mode from left aligned to center aligned output
(or vice versa) while channels are operating can cause irregularities in the
PWM output. It is recommended to program the output mode before
enabling the PWM channel.
Figure 22-17. PWM Left Aligned Output Waveform
To calculate the output frequency in left aligned output mode for a particular channel, take the selected
clock source frequency for the channel (A, B, SA, or SB) and divide it by the value in the period register
for that channel.
PWMx Frequency = Clock (A, B, SA, or SB) / PWMPERx
PWMx Duty Cycle (high time as a% of period):
Polarity = 0 (PPOLx = 0)
Duty Cycle = [(PWMPERx-PWMDTYx)/PWMPERx] * 100%
Polarity = 1 (PPOLx = 1)
Duty Cycle = [PWMDTYx / PWMPERx] * 100%
As an example of a left aligned output, consider the following case:
Clock Source = bus clock, where bus clock = 10 MHz (100 ns period)
PPOLx = 0
PWMPERx = 4
PWMDTYx = 1
PWMx Frequency = 10 MHz/4 = 2.5 MHz
PWMx Period = 400 ns
PWMx Duty Cycle = 3/4 *100% = 75%
The output waveform generated is shown in Figure 22-18.
PWMDTYx
Period = PWMPERx
PPOLx = 0
PPOLx = 1
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 859
Figure 22-18. PWM Left Aligned Output Example Waveform
22.4.2.6 Center Aligned Outputs
For center aligned output mode selection, set the CAEx bit (CAEx = 1) in the PWMCAE register and the
corresponding PWM output will be center aligned.
The 8-bit counter operates as an up/down counter in this mode and is set to up whenever the counter is
equal to $00. The counter compares to two registers, a duty register and a period register as shown in the
block diagram in Figure 22-16. When the PWM counter matches the duty register, the output flip-flop
changes state, causing the PWM waveform to also change state. A match between the PWM counter and
the period register changes the counter direction from an up-count to a down-count. When the PWM
counter decrements and matches the duty register again, the output flip-flop changes state causing the
PWM output to also change state. When the PWM counter decrements and reaches zero, the counter
direction changes from a down-count back to an up-count and a load from the double buffer period and
duty registers to the associated registers is performed, as described in Section 22.4.2.3, “PWM Period and
Duty”. The counter counts from 0 up to the value in the period register and then back down to 0. Thus the
effective period is PWMPERx*2.
NOTE
Changing the PWM output mode from left aligned to center aligned output
(or vice versa) while channels are operating can cause irregularities in the
PWM output. It is recommended to program the output mode before
enabling the PWM channel.
Figure 22-19. PWM Center Aligned Output Waveform
Period = 400 ns
E = 100 ns
Duty Cycle = 75%
PPOLx = 0
PPOLx = 1
PWMDTYx PWMDTYx
Period = PWMPERx*2
PWMPERx
PWMPERx
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
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860 Freescale Semiconductor
To calculate the output frequency in center aligned output mode for a particular channel, take the selected
clock source frequency for the channel (A, B, SA, or SB) and divide it by twice the value in the period
register for that channel.
PWMx Frequency = Clock (A, B, SA, or SB) / (2*PWMPERx)
PWMx Duty Cycle (high time as a% of period):
Polarity = 0 (PPOLx = 0)
Duty Cycle = [(PWMPERx-PWMDTYx)/PWMPERx] * 100%
Polarity = 1 (PPOLx = 1)
Duty Cycle = [PWMDTYx / PWMPERx] * 100%
As an example of a center aligned output, consider the following case:
Clock Source = bus clock, where bus clock= 10 MHz (100 ns period)
PPOLx = 0
PWMPERx = 4
PWMDTYx = 1
PWMx Frequency = 10 MHz/8 = 1.25 MHz
PWMx Period = 800 ns
PWMx Duty Cycle = 3/4 *100% = 75%
Shown in Figure 22-20 is the output waveform generated.
Figure 22-20. PWM Center Aligned Output Example Waveform
22.4.2.7 PWM 16-Bit Functions
The scalable PWM timer als o has the option of generating up to 8-channels of 8-bits or 4-channels of 16-
bits for greater PWM resolution. This 16-bit channel option is achieved through the concatenation of two
8-bit channels.
The PWMCTL register contains four control bits, each of which is used to concatenate a pair of PWM
channels into one 16-bit channel. Channels 6 and 7 are concatenated with the CON67 bit, channels 4 and
5 are concatenated with the CON45 bit, channels 2 and 3 are concatenated with the CON23 bit, and
channels 0 and 1 are concatenated with the CON01 bit.
NOTE
Change these bits only when both corresponding channels are disabled.
When channels 6 and 7 are concatenated, channel 6 registers become the high order bytes of the double
byte channel, as shown in Figure 22-21. Similarly, when channels 4 and 5 are concatenated, channel 4
E = 100 ns
DUTY CYCLE = 75%
E = 100 ns
PERIOD = 800 ns
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 861
registers become the high order bytes of the double byte channel. When channels 2 and 3 are concatenated,
channel 2 registers become the high order bytes of the double byte channel. When channels 0 and 1 are
concatenated, channel 0 registers become the high order bytes of the double byte channel.
When using the 16-bit concatenated mode, the clock source is determined by the low order 8-bit channel
clock select control bits. That is channel 7 when channels 6 and 7 are concatenated, channel 5 when
channels 4 and 5 are concatenated, channel 3 when channels 2 and 3 are concatenated, and channel 1 when
channels 0 and 1 are concatenated. The resulting PWM is output to the pins of the corresponding low order
8-bit channel as also shown in Figure 22-21. The polarity of the resulting PWM output is controlled by the
PPOLx bit of the corresponding low order 8-bit channel as well.
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
862 Freescale Semiconductor
Figure 22-21. PWM 16-Bit Mode
Once concatenated mode is enabled (CONxx bits set in PWMCTL register), enabling/disabling the
corresponding 16-bit PWM channel is controlled by the low order PWMEx bit. In this case, the high order
bytes PWMEx bits have no effect and their corresponding PWM output is disabled.
PWMCNT6 PWMCNT7
PWM7
Clock Source 7 High Low
Period/Duty Compare
PWMCNT4 PWMCNT5
PWM5
Clock Source 5
High Low
Period/Duty Compare
PWMCNT2 PWMCNT3
PWM3
Clock Source 3
High Low
Period/Duty Compare
PWMCNT0 PWMCNT1
PWM1
Clock Source 1
High Low
Period/Duty Compare
Maximum possible 16-bit channels
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 863
In concatenated mode, writes to the 16-bit counter by using a 16-bit access or writes to either the low or
high order byte of the counter will reset the 16-bit counter. Reads of the 16-bit counter must be made by
16-bit access to maintain data coherency.
Either left aligned or center aligned output mode can be used in concatenated mode and is controlled by
the low order CAEx bit. The high order CAEx bit has no effect.
Table 22-13 is used to summarize which channels are used to set the various control bits when in 16-bit
mode.
22.4.2.8 PWM Boundary Cases
Table 22-14 summarizes the boundary conditions for the PWM regardless of the output mode (left aligned
or center aligned) and 8-bit (normal) or 16-bit (concatenation).
22.5 Resets
The reset state of each individual bit is listed within the Section 22.3.2, “Register Descriptions” which
details the registers and their bit-fields. All special functions or modes which are initialized during or just
following reset are described within this section.
The 8-bit up/down counter is configured as an up counter out of reset.
All the channels are disabled and all the counters do not count.
Table 22-13. 16-bit Concatenation Mode Summary
Note: Bits related to available channels have functional significance.
CONxx PWMEx PPOLx PCLKx CAEx PWMx
Output
CON67 PWME7 PPOL7 PCLK7 CAE7 PWM7
CON45 PWME5 PPOL5 PCLK5 CAE5 PWM5
CON23 PWME3 PPOL3 PCLK3 CAE3 PWM3
CON01 PWME1 PPOL1 PCLK1 CAE1 PWM1
Table 22-14. PWM Boundary Cases
PWMDTYx PWMPERx PPOLx PWMx Output
$00
(indicates no duty)
>$00 1 Always low
$00
(indicates no duty)
>$00 0 Always high
XX $00(1)
(indicates no period)
1. Counter = $00 and does not count.
1 Always high
XX $001
(indicates no period)
0 Always low
>= PWMPERx XX 1 Always high
>= PWMPERx XX 0 Always low
Chapter 22 Pulse-Width Modulator (S12PWM8B8CV2)
MC9S12ZVM Family Reference Manual Rev. 2.2
864 Freescale Semiconductor
For channels 0, 1, 4, and 5 the clock choices are clock A.
For channels 2, 3, 6, and 7 the clock choices are clock B.
22.6 Interrupts
The PWM module has no interrupt.
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 865
Appendix A
MCU Electrical Specifications
A.1 General
This section contains the most accurate electrical information for the qualifi ed derivatives S12ZVML128,
S12ZVMC128, S12ZVML64, S12ZVMC64 and S12ZVML32 available at the time of publication.
The specifications relating to the ZVMC256, ZVML31, ZVM32 and ZVM16 are preliminary.
A.1.1 Parameter Classification
The electrical parameters shown in the appendices are guaranteed by various methods.
The parameter classification is documented in the PPAP.
The parameter classification columns are for Freescale internal use only.
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
866 Freescale Semiconductor
Table A-1. Power Supplies
A.1.2 Pins
There are 4 groups of functional pins.
A.1.2.1 General Purpose I/O Pins (GPIO)
The I/O pins have a level in the range of 4.5V to 5.5V. This class of pins is comprised of all port I/O pins,
BKGD and the RESET pins.
A.1.2.2 High Voltage Pins
These consist of the LIN, BST, HD, VCP, CP, VLS_OUT, VLS[2:0], VBS[2:0], HG[2:0], HS[2:0],
LG[2:0], LD[2:0], PL0, CANH0, CANL0, SPLIT0, VDDS1, VDDS2, BCTLS1, BCTLS2, SNPS1,
Mnemonic Nominal Voltage Description
VDD 1.8 V 1.8V core supply voltage generated by on chip voltage regulator
VSS1 0 V Ground pin for 2.8V flash supply voltage generated by on chip voltage regulator
VSS2 0 V Ground pin for 1.8V core supply voltage generated by on chip voltage regulator
VDDF 2.8 V 2.8V flash supply voltage generated by on chip voltage regulator
VDDX1 (1)
1. All VDDX pins are internally connected by metal
NOTE
VDDA is connected to VDDX pins by diodes for ESD protection such that
VDDX must not exceed VDDA by more than a diode voltage drop. VSSA
and VSSX are connected by anti-parallel diodes for ESD protection.
5.0 V 5V power supply output for I/O drivers generated by on chip voltage regulator
VSSX10 V Ground pin for I/O drivers
VDDX2 5.0 V 5V power supply output for I/O drivers generated by on chip voltage regulator
VDDA 5.0 V 5V Power supply for the analog-to-digital converter and for the reference circuit of the
internal voltage regulator
VSSA 0 V Ground pin for VDDA analog supply
LGND 0 V Ground pin for LIN physical interface
HD 12 V GDU Highside Drain. Also used as LIN supply, VLINSUP.
VSUP 12 V/18 V External power supply for voltage regulator
VDDC 5 V Power supply output for CANPHY
VDDS2 5 V Power supply output (5V) for external sensors
VDDS1 5 V Power supply output (5V) for external sensors
VLS_OUT 11 V GDU voltage regulator output for low side FET-predriver power supply.
VSSB 0 V Ground pin for boost supply.
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 867
SNPS2 pins. These pins are intended to interface to external components operating in the automotive
battery range. They have nominal voltages above the standard 5V I/O voltage range.
A.1.2.3 Oscillator
If the designated EXTAL and XTAL pins are configured for external oscillator operation then these pins
have a nominal voltage of 1.8 V.
A.1.2.4 TEST
This pin is used for production testing only. The TEST pin must be tied to ground in all applications.
A.1.3 Current Injection
Power supply must maintain regulation within operating VDDX or VDD range during instantaneous and
operating maximum current conditions. Figure A-1. shows a 5 V GPIO pad driver and the on chip voltage
regulator with VDDX output. It shows also the power and ground pins VSUP, VDDX, VSSX and VSSA.
Px represents any 5 V GPIO pin. Assume Px is configured as an input. The pad driver transistors P1 and
N1 are switched off (high impedance). If the voltage Vin on Px is greater than VDDX a positive injection
current Iin will flow through diode D1 into VDDX node. If this injection current Iin is greater than ILoad,
the internal power supply VDDX may go out of regulation. Ensure the external VDDX load will shunt
current greater than maximum inje ction current. This is the greatest ris k when the MCU is not consuming
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
868 Freescale Semiconductor
power; e.g., if no system clock is present, or if the clock rate is very low which would reduce overall power
consumption.
Figure A-1. Current Injection on GPIO Port if Vin > VDDX
A.1.4 Absolute Maximum Ratings
Absolute maximum ratings are stress ratings only. A functional operation outside these ranges is not
guaranteed. Stress beyo nd these limits may af fect the reliability or cause permanent damage of the device.
This device contains circuitry protecting against damage due to high static voltage or electrical fields;
however, it is advised that normal precautions be taken to avoid application of any voltages higher than
maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused
inputs are tied to an appropriate logic voltage level.
The CANPHY maximum ratings are specified in Appendix H.1
Table A-2. Absolute Maximum Ratings
Num Rating Symbol Min Max Unit
1 Voltage regulator and LINPHY supply voltage VSUP -0.3 42 V
2 DC voltage on LIN VLIN -32 42 V
3 DC voltage on HVI pin PL0 VHVI -27 42 V
4 Core logic supply voltage VDD -0.3 2.16 V
VBG Pad Driver
VDDX
VSSX
VSSA
VSUP
Vin > VDDX
Iin
Iin
Voltage Regulator
D1
P1
N1
CLoad
ISUP
ILoad
IDDX
P2
Px
+
_
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 869
A.1.5 ESD Protection and Latch-up Immunity
All ESD testing is in conformity with CDF-AEC-Q100 stress test qualification for automotive grade
integrated circuits. During the device qualification ESD stresses were performed for the Human Body
Model (HBM) and the Charged-Device Model.
5 Flash supply voltage VDDF -0.3 3.6 V
6 FET-Predriver High-Side Drain VHD -0.3 42 V
7 FET-Predriver Bootstrap Capacitor Connection VVBS -0.3 42 V
8 FET-Predriver High-Side Gate(1) VHG -5 42 V
9 FET-Predriver High-Side Source(1) VHS -5 42 V
10 Generated FET-Predriver Low-Side Supply VVLS_OUT -0.3 42 V
11 FET-Predriver Low-Side Supply Inputs VVLS -0.3 42 V
12 FET-Predriver Low-Side Gate(1) VLG -5 42 V
13 FET-Predriver Low-Side Source(1) VLS -5 42 V
14 FET-Predriver Low-Side Drain VLD -5 42 V
15 FET-Predriver Charge Pump Output VCP -0.3 42 V
16 FET-Predriver Charge Pump Input VVCP -0.3 42 V
17 FET-Predriver Boost Converter Connection VBST -0.3 42 V
18 FET-Predriver Boost Converter Ground VVSSB -0.3 0.3 V
19 Voltage Regulator Ballast Connection VBCTL -0.3 42 V
20 Supplies VDDA, VDDC, VDDX, VDDS1, VDDS2 VVDDACX -0.3 6 V
21 Base connection of bipolar for CANPHY supply VBCTLC -0.3 42 V
22 Voltage difference VDDX to VDDA(2) VDDX –0.3 0.3 V
23 Voltage difference VSSX to VSSA VSSX –0.3 0.3 V
24 Digital I/O input voltage VIN –0.3 6.0 V
25 EXTAL, XTAL (3) VILV –0.3 2.16 V
26 TEST input VTEST –0.3 10.0 V
27 Instantaneous current. Single pin limit for all digital I/O pins(4) ID–25 +25 mA
28 Instantaneous maximum current on EVDD1 IEVDD1 -80 +25 mA
29 Instantaneous maximum current. Single pin limit for EXTAL, XTAL IDL –25 +25 mA
30 Storage temperature range Tstg –65 155 C
1. Negative limit for pulsed operation only
2. VDDX and VDDA must be shorted
3. EXTAL, XTAL pins configured for external oscillator operation only
4. All digital I/O pins are internally clamped to VSSX and VDDX, or VSSA and VDDA.
Table A-2. Absolute Maximum Ratings
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
870 Freescale Semiconductor
A device will be defined as a failure if after exposure to ESD pulses the device no longer meets the device
specification. Complete DC parametric and functional testing is performed per the applicable device
specification at room temperature followed by hot temperature, unless specified otherwise.
For better immunity to ESD events, the PCB test point for the BST pin should be located at a distance from
the device to increase the track length to the BST pin, but the diode should be located close to the device.
This may require a track branch on the PCB to ensure that the test point is further away from the device
than the diode.
Table A-3. ESD and Latch-up Test Conditions
Model Spec Description Symbol Value Unit
Human Body JESD22-A114 Series Resistance R 1500
Storage Capacitance C 100 pF
Number of Pulses per pin
positive
negative
--
1
1
Charged-
Device
JESD22-C101 Series Resistance R 0
Storage Capacitance C 4 pF
Latch-up for 5V
GPIOs
Minimum Input Voltage Limit -2.5 V
Maximum Input Voltage Limit +7.5 V
Latch-up for HD,
VCP, BST, LIN,
BCTL, BCTLC
Minimum Input Voltage Limit -7 V
Maximum Input Voltage Limit +27 V
Latch-up for
CANH,CANL,
SPLIT
Minimum Input Voltage Limit -7 V
Maximum Input Voltage Limit +21 V
Latch-up for
HG,HS
Minimum Input Voltage Limit -5 V
Maximum Input Voltage Limit (VBS=10V) 15 V
Latch-up for
LG,LS, LD
Minimum Input Voltage Limit -5 V
Maximum Input Voltage Limit (VLS=10V) 15 V
Table A-4. ESD Protection and Latch-up Characteristics
Num C Rating Symbol Min Max Unit
1 Human Body Model (HBM):
- LIN versus LGND
- CANH, CANL, SPLIT, PL0
- All other pins
VHBM
VHBM
VHBM
+/-6
+/-4
+/-2
-
-
-
KV
2 Charged-Device Model (CDM): Corner Pins VCDM +/-750 - V
3 Charged-Device Model (CDM): All other pins VCDM +/-500 - V
4 Direct Contact Discharge IEC61000-4-2 with and with out 220pF
capacitor (R=330, C=150pF):
LIN versus LGND, CANH, CANL
VESDIEC
+/-6 - KV
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 871
A.1.6 Recommended Capacitor Values
A.1.7 Operating Conditions
This section describes the operating conditions of the device. Unless otherwise noted these conditions
apply to the following electrical parameters.
5 Latch-up Current of 5V GPIOs at T=125C
positive
negative
ILAT
+100
-100
-mA
6 Latch-up Current (VCP, BST, LIN, HD, HS, HG, LG, LS, LD)
T=125C
positive
negative
ILAT
+100
-100
-mA
7 Latch-up Current of 5V GPIOs at 27C
positive
negative
ILAT
+200
-200
-mA
8 Latch-up Current (VCP, BST, LIN, HD, HS, HG, LG, LS, LD)
T= 27C
positive
negative
ILAT
+200
-200
-mA
Table A-5. Recommended Capacitor Values (nominal component values)
Num Characteristic Symbol Typical Unit
1 VDDX decoupling capacitor (1) (2)
1. X7R ceramic
2. One capacitor per VDDX pin
CVDDX1,2 100-220 nF
2 VDDA decoupling capacitor (1) CVDDA 100-220 nF
3 VDDX stability capacitor (3) (4)
3. 4.7F ceramic or 10F tantalum
4. Can be placed anywhere on the 5V supply node (VDDA, VDDX)
CVDD5 4.7-10 F
4 VDDC stability capacitor CVDDC 4.7-10 F
5 VDDS[2:1] stability capacitor CVDDS 4.7-10 F
6 VLS decoupling capacitor (1) (5)
5. One capacitor per each VLS[2:0] pin
CVLS0,1,2 100-220 nF
7 VLS stability capacitor (3) (6)
6. Can be placed anywhere on the VLS node
CVLS 4.7-10 F
8 VDD decoupling capacitor (1) CVDD 100-220 nF
9 VDDF decoupling capacitor (1) CVDDF 100-220 nF
10 LIN decoupling capacitor (1) CLIN 220 pF
Table A-4. ESD Protection and Latch-up Characteristics
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
872 Freescale Semiconductor
NOTE
Please refer to the temperature rating of the device with regards to the
ambient temperature TA and the junction temperature TJ. For power
dissipation calculations refer to Section A.1.8, “Power Dissipation and
Thermal Characteristics”.
NOTE
Operation is guaranteed when powering down until low voltage reset
assertion.
A.1.8 Power Dissipation and Thermal Characteristics
Power dissipation and thermal characteristics are closely related. The user must assure that the maximum
operating junction temperature is not exceeded. The average chip-junction temperature (TJ) in C can be
obtained from:
Table A-6. Operating Conditions
Num Rating Symbol Min Typ Max Unit
1 Voltage regulator and LINPHY supply voltage(1)
1. Normal operating range is 5.5 V - 18 V. Continuous operation at 40 V is not allowed. Only Transient Conditions (Load Dump)
single pulse tmax<400 ms. Operation down to 3.5V is guaranteed without reset, however some electrical parameters are
specified only in the range above 4.5 V. Operation in the range 20V<VSUP<26.5V is limited to 1 hour over lifetime of the
device. In this range the device continues to function but electrical parameters are degraded.
VSUP 3.5 12 40 V
2 Voltage difference VDDX to VDDA VDDX –0.1 0.1 V
3 Voltage difference VSSX to VSSA VSSX –0.1 0.1 V
Digital logic supply voltage VDD 1.72 1.8 1.98 V
4 Oscillator fosc 4—20MHz
5 Bus frequency(2)
-40C < Tj < 150C
150C < Tj < 175C (Temp option W only)
2. The flash program and erase operations must configure fNVMOP as specified in the NVM electrical section.
fbus (4)
4. Refer to fATDCLK for minimum ADC operating frequency. This is derived from the bus clock.
50
40
MHz
6 Bus frequency without flash wait states
-40C < Tj < 150C
150C < Tj < 175C (Temp option W only)
fWSTAT
25
20
MHz
7a Operating junction temperature range
Operating ambient temperature range(3) (option V)
3. Please refer to Section A.1.8, “Power Dissipation and Thermal Characteristics” for more details about the relation between
ambient temperature TA and device junction temperature TJ.
TJ
TA
–40
–40
125
105
C
7b Operating junction temperature range
Operating ambient temperature range(3) (option M)
TJ
TA
–40
–40
150
125
C
7c Operating junction temperature range
Operating ambient temperature range(3) (option W)
TJ
TA
–40
–40
175
150
C
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 873
The total power dissipation PD can be calculated from the equation below . Table A-7 below lists the power
dissipation components. Figure A-2 provides an overview of power pin connectivity.
Table A-7. Power Dissipation Components
Power Component Description
PVSUP = VSUP ISUP Internal Power through VSUP pin
PBCTL = VBCTL IBCTL Internal Power through BCTL pin
PINT = VDDX IVDDX + VDDA IVDDA Internal Power through VDDX/A pins.
PGPIO = VI/O II/O Power dissipation of external load driven by GPIO Port.
Assuming the load is connected between GPIO and
ground. This power component is included in PINT and
is subtracted from overall MCU power dissipation PD
PLIN = VLIN ILIN Power dissipation of LINPHY
PGDU(1) = (-VVLS_OUT IVLS_OUT) + (VVBS IVBS) +
(VVCPIVCP) + (VVLSn IVLSn)
1. No switching. GDU power consumption is very load dependent.
Power dissipation of FET-Predriver without the outputs
switching
TJTAPDJA
+=
TJJunction Temperature, [C=
TAAmbient Temperature, [C=
PDTotal Chip Power Dissipation, [W]=
JA Package Thermal Resistance, [ C/W]=
PD = PVSUP + PBCTL + PINT - PGPIO + PLIN - PEVDD1 + PGDU
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
874 Freescale Semiconductor
Figure A-2. Supply Currents Overview
Table A-8. 80LQFP-EP Thermal Package Characteristics
Num C(1)
1. The values for thermal resistance are achieved by package simulations
Rating Symbol Min Typ Max Unit
1 Thermal resistance, single sided PCB(2) Natural
Convection
2. Junction to ambient thermal resistance, JA was simulated to be equivalent to JEDEC JESD51-2 with the single layer board
(JESD51-3) horizontal.
JA —TBD—C/W
2 Thermal resistance, double sided PCB(3)
with 2 internal planes. Natural Convection.
JA —TBD—C/W
3 Thermal resistance, single sided PCB(3)
(@200 ft./min)
JA —TBD—C/W
4 Thermal resistance, double sided PCB(3)
with 2 internal planes (@200 ft./min).
3. Junction to ambient thermal resistance, JA was simulated to be equivalent to the JEDEC specification JESD51-6 with the
board (JESD51-7) horizontal.
JA —TBD—C/W
5 Junction to Board (4)
4. Thermal resistance between the die and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on
the top surface of the board near the package.
JB —TBD—C/W
6 Junction to Case Top (5) JCtop —TBD—C/W
7 Junction to Case Bottom (6) JCbottom —TBD—C/W
8 Junction to Package Top (7) JT —TBD—C/W
VSUP
VCP
VBS[2:0]
VDDA
VDDX1
VDDX2
VSSX1
LIN
EVDD1
VBAT
ISUP
IEVDD
ILIN
GND
GPIO
II/O
VI/O
VDDX RL1
RL2
MC9S12ZVM-Family
L Package Option
BCTL
VLS_OUT
IRBATP
IVDDX VLS[2:0]
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 875
Table A-9. 64LQFP-EP Thermal Package Characteristics (ZVML31, ZVM32, ZVM16 devices)
5. Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL SPEC-883 Method
1012.1).
6. Thermal resistance between the die and the solder pad on the bottom of the package based on simulation without any interface
resistance
7. Thermal characterization parameter indicating the temperature difference between package top and the junction temperature
per JEDEC JESD51-2. A single layer board is used for this simulation.
Num C(1)
1. The values for thermal resistance are achieved by package simulations
Rating Symbol Min Typ Max Unit
1 Thermal resistance 64LQFP-EP, single sided PCB(2)
Natural Convection
2. Junction to ambient thermal resistance, JA was simulated to be equivalent to JEDEC JESD51-2 with the single layer board
(JESD51-3) horizontal.
JA —71—C/W
2 Thermal resistance 64LQFP-EP, double sided PCB(3)
with 2 internal planes. Natural Convection.
JA —32—C/W
3 Thermal resistance 64LQFP-EP, single sided PCB(3)
(@200 ft./min)
JA —58—C/W
4 Thermal resistance 64LQFP-EP, double sided PCB(3)
with 2 internal planes (@200 ft./min).
3. Junction to ambient thermal resistance, JA was simulated to be equivalent to the JEDEC specification JESD51-6 with the
board (JESD51-7) horizontal.
JA —27—C/W
5 Junction to Board 64LQFP-EP(4)
4. Thermal resistance between the die and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on
the top surface of the board near the package.
JB —16—C/W
6 Junction to Case Top 64LQFP-EP(5)
5. Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL SPEC-883 Method
1012.1).
JCtop —19—C/W
7 Junction to Case Bottom 64LQFP-EP(6)
6. Thermal resistance between the die and the solder pad on the bottom of the package based on simulation without any interface
resistance
JCbottom —1.8—C/W
8 Junction to Package Top 64LQFP-EP(7)
7. Thermal characterization parameter indicating the temperature difference between package top and the junction temperature
per JEDEC JESD51-2. A single layer board is used for this simulation.
JT —4—C/W
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
876 Freescale Semiconductor
Table A-10. 64LQFP-EP Thermal Package Characteristics (All other devices)
Table A-11. 48LQFP-EP Thermal Package Characteristics
Num C(1)
1. The values for thermal resistance are achieved by package simulations
Rating Symbol Min Typ Max Unit
1 Thermal resistance 64LQFP-EP, single sided PCB(2)
Natural Convection
2. Junction to ambient thermal resistance, JA was simulated to be equivalent to JEDEC JESD51-2 with the single layer board
(JESD51-3) horizontal.
JA —64—C/W
2 Thermal resistance 64LQFP-EP, double sided PCB(3)
with 2 internal planes. Natural Convection.
JA —30—C/W
3 Thermal resistance 64LQFP-EP, single sided PCB(3)
(@200 ft./min)
JA —51—C/W
4 Thermal resistance 64LQFP-EP, double sided PCB(3)
with 2 internal planes (@200 ft./min).
3. Junction to ambient thermal resistance, JA was simulated to be equivalent to the JEDEC specification JESD51-6 with the
board (JESD51-7) horizontal.
JA —24—C/W
5 Junction to Board 64LQFP-EP(4)
4. Thermal resistance between the die and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on
the top surface of the board near the package.
JB —13—C/W
6 Junction to Case Top 64LQFP-EP(5)
5. Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL SPEC-883 Method
1012.1).
JCtop —16—C/W
7 Junction to Case Bottom 64LQFP-EP(6)
6. Thermal resistance between the die and the solder pad on the bottom of the package based on simulation without any interface
resistance
JCbottom —1.6—C/W
8 Junction to Package Top 64LQFP-EP(7)
7. Thermal characterization parameter indicating the temperature difference between package top and the junction temperature
per JEDEC JESD51-2. A single layer board is used for this simulation.
JT —4—C/W
Num C(1)
1. The values for thermal resistance are achieved by package simulations
Rating Symbol Min Typ Max Unit
1 Thermal resistance 48LQFP-EP, single sided PCB(2)
Natural Convection
JA —74—C/W
2 Thermal resistance 48LQFP-EP, double sided PCB(2)
with 2 internal planes. Natural Convection.
JA —35—C/W
3 Thermal resistance 48LQFP-EP, single sided PCB(3)
(@200 ft./min)
JA —61—C/W
4 Thermal resistance 48LQFP-EP, double sided PCB(3)
with 2 internal planes (@200 ft./min).
JA —29—C/W
5 Junction to Board 48LQFP-EP(4) JB —15—C/W
6 Junction to Case Top 48LQFP-EP(5) JCtop —25—C/W
7 Junction to Case Bottom 48LQFP-EP(6) JCbottom —1.9—C/W
8 Junction to Package Top 48LQFP-EP(7) JT —4.8—C/W
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 877
2. Per JEDEC JESD51-2 with natural convection for horizontally orientated board. Board meets JESD51-9 specification for 1s or
2s2p board, respectively.
3. Per JEDEC JESD51-6 with natural convection for horizontally orientated board. Board meets JESD51-9 specification for 1s or
2s2p board, respectively.
4. Thermal resistance between the die and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on
the top surface of the board near the package.
5. Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL SPEC-883 Method
1012.1).
6. Thermal resistance between the die and the solder pad on the bottom of the package based on simulation without any interface
resistance
7. Thermal characterization parameter indicating the temperature difference between package top and the junction temperature
per JEDEC JESD51-2. A single layer board is used for this simulation.
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
878 Freescale Semiconductor
A.1.9 General Purpose I/O Characteristics
Table A-12. 5V I/O Characteristics
Conditions are 4.5 V < VDDX< 5.5 V , -40C < Tj < 175C for all GPIO pins (defined in A.1.2.1/A-866) unless otherwise noted.
Num C Rating Symbol Min Typ Max Unit
1 Input high voltage, 3.13 V < VDDX< 5.5 V VIH 0.65*VDDX ——V
2 Input high voltage VIH ——V
DDX+0.3 V
3 Input low voltage, 3.13 V < VDDX< 5.5 V VIL 0.35*VDDX V
4 Input low voltage VIL VSSX–0.3 V
5 Input hysteresis VHYS 250 mV
6a Input leakage current. All pins except PAD8 , PP0. (1)
Vin = VDDX or VSSX
Iin -1 1 A
6b Input leakage current. PAD8, PP0 (1)
Vin = VDDX or VSSX
Iin -2.5 2.5 A
6c Input leakage current. PAD8, PP0 (1)
-40C < Tj < 150C, Vin = VDDX or VSSX
1. Pins in high impedance input mode. Maximum leakage current occurs at maximum operating temperature. Current
decreases by approximately one-half for each 8°C to 12°C in the temperature range from 50C to 125C.
Iin -1 1 A
7 Output high voltage (All GPIO except EVDD1)
IOH = –4 mA
VOH VDDX – 0.8 V
8a Output high voltage (EVDD1), VDDX > 4.85V
Partial Drive IOH = –2 mA
Full Drive IOH = –20mA
VOH VDDX – 0.8 V
8b Output high voltage (EVDD1), VDDX > 4.85V
Full Drive IOH = –10mA
VOH VDDX – 0.1 V
9 Output low voltage (All GPIO except EVDD1)
IOL = +4mA
VOL ——0.8V
10 Output low voltage (EVDD1) Partial drive I
OL = +2mA
or Full drive IOL = +20mA
VOL ——0.8V
11 Maximum allowed continuous current on EVDD1 IEVDD1 -20 10 mA
12 Over-current Detect Threshold EVDD1 IOCD -80 -40 mA
13 Internal pull up current (All GPIO except RESET)
VIH min > input voltage > VIL max
IPUL -10 -130 A
14 Internal pull up resistance (RESET pin) RPUL 2.5 5 10 K
15 Internal pull down current, VIH min > Vin > VIL max IPDH 10 130 A
16 Input capacitance Cin —7—pF
17a Injection current(2) Single pin limit (all GPIO pins)
Total device limit, sum of all injected currents
2. For better ADC accuracy, the application should avoid current injection into pin PAD8/VREFH. Refer to Section A.1.3,
“Current Injection” for more details
IICS
IICP
–2.5
–25
—2.5
25
mA
17b Injection current single pin (HG,HS,LG,LS pins)(3) IICS –2.5 2.5 mA
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 879
A.1.10 High Voltage Input Electrical Characteristics
A.1.11 HV Physical Interface Characteristics
The HV Physical Interface specification is included in the LINPHY electrical section.
3. For better ADC accuracy, the application should avoid current injection into pin HS0 and HG0 during ADC conversions. This
can be achieved by correct synchronization of ADC and FET switching..
Table A-13. Pin Timing Characteristics (Junction Temperature From -40C To +175C)
Conditions are 4.5 V < VDDX< 5.5 V unless otherwise noted. I/O Characteristics for all GPIO pins (defined in A.1.2.1/A-866).
Num C Rating Symbol Min Typ Max Unit
1 Port P, S, AD interrupt input pulse filtered
(STOP mode )
tP_MASK —— 3s
2 Port P, S, AD interrupt input pulse passed
(STOP mode )
tP_PASS 10 s
3 Port P, S, AD interrupt input pulse filtered (STOP) in
number of bus clock cycles of period 1/fbus
nP_MASK —— 3
4 Port P, S, AD interrupt input pulse passed (STOP) in
number of bus clock cycles of period 1/fbus
nP_PASS 4—
5IRQ
pulse width, edge-sensitive mode (STOP) in
number of bus clock cycles of period 1/fbus
nIRQ 1—
6 RESET pin input pulse filtered RP_MASK ——12ns
7 RESET pin input pulse passed RP_PASS 18 ns
Table A-14. High Voltage Input Electrical Characteristics (Junction Temperature From -40C To +175C)
Conditions are 5.5V < VSUP< 18V unless otherwise noted.
Num C Rating Symbol Min Typ Max Unit
1 Digital Input Threshold
• VSUP >6.5V
• 5.5V< VSUP < 6.5V
VTH_HVI
2.8
2.0
3.5
2.5
4.5
3.8
V
V
2 Input Hysteresis VHYS_HVI 250 mV
3 Pin Input Divider Ratio with external series REXT_HVI
Ratio = VHVI / VInternal(ADC)
RatioL_HVI
RatioH_HVI
2
6
4 Analog Input Matching
Absolute Error on VADC
• Compared to VHVI / RatioL_HVI, (1V < VHVI < 7V)
• Compared to VHVI / RatioH_HVI, (3V < VHVI < 21V)
• Direct Mode (PTADIRL=1), (0.5V < VHVI < 3.5V)
AIML_HVI
AIMH_HVI
AIMD_HVI
+/- 2
+/- 2
+/- 2
+/- 5
+/- 5
+/- 5
%
%
%
5 High Voltage Input Series Resistor REXT_HVI —10—K
6 Enable Uncertainty Time tUNC_HVI —1—s
7 Input capacitance CIN_HVI —8—pF
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
880 Freescale Semiconductor
A.1.12 Supply Currents
This section describes the current consumption characteristics of the device as well as the conditions for
the measurements.
A.1.12.1 Measurement Conditions
Current is measured on VSUP. VDDX is connected to VDDA. It does not include the current to drive
external loads. Unless otherwise noted the currents are measured in special single chip mode and the CPU
code is executed from RAM. For Run and Wait current measurements PLL is on and the reference clock
is the IRC1M trimmed to 1MHz. For the junction temperature range from -40°C to +150°C the bus
frequency is 50MHz. For the temperature range from +150°C to +175°C, the bus frequency is 40MHz.
Table A-15, Table A-16 and Table A-17 show the configuration of the CPMU module and the peripherals
for Run, Wait and Stop current measurement.
Table A-15. CPMU Configuration for Pseudo Stop Current Measurement
CPMU REGISTER Bit settings/Conditions
CPMUCLKS PLLSEL=0, PSTP=1, CSAD=0,
PRE=PCE=RTIOSCSEL=1
COPOSCSEL[1:0]=01
CPMUOSC OSCE=1, Quartz oscillator fEXTAL=4MHz
CPMURTI RTDEC=0, RTR[6:4]=111, RTR[3:0]=1111
CPMUCOP WCOP=1, CR[2:0]=111
Table A-16. CPMU Configuration for Run/Wait and Full Stop Current Measurement
CPMU REGISTER Bit settings/Conditions
CPMUSYNR VCOFRQ[1:0]= 3,SYNDIV[5:0] = 49
CPMUPOSTDIV POSTDIV[4:0]=0
CPMUCLKS PLLSEL=1, CSAD=0
CPMUOSC OSCE=0,
Reference clock for PLL is fref=firc1m trimmed to 1MHz
API settings for STOP current measurement
CPMUAPICTL APIEA=0, APIFE=1, APIE=0
CPMUACLKTR trimmed to >=20Khz
CPMUAPIRH/RL set to 0xFFFF
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 881
Table A-17. Peripheral Configurations for Run & Wait Current Measurement
Peripheral Co nfiguration
SCI Continuously transmit data (0x55) at speed of 19200 baud
SPI Configured to master mode, continuously transmit data (0x55) at 1Mbit/s
ADC The peripheral is configured to operate at its maximum specified frequency and to
continuously convert voltages on a single input channel
MSCAN Configured in loop back mode with a bit rate of 500kbit/s.
DBG The module is disabled, as in typical final applications
PTU The module is enabled, bits TG1EN and TG0EN are set. PTUFRE is also set to generate
automatic reload events.
PMF The module is configured with a modulus rate of 10 kHz
TIM The peripheral is configured to output compare mode,
GDU LDO enabled. Charge pump enabled. Current sense0 enabled. Boost disabled. No
output activity (too load dependent)
COP & RTI Enabled
BATS Enabled
LINPHY Connected to SCI and continuously transmit data (0x55) at speed of 19200 baud
CANPHY (ZVMC256) Enabled and connected to MSCAN module
Table A-18. Run and Wait Current Characteristics
Conditions see Ta bl e A- 16 and Tab l e A- 1 7, VSUP=18 V
Num C Rating Symbol Min Typ Max Unit
1 Run Current, -40°C < TJ < 150°C, fbus= 50MHz
ZVMC256
Other devices
ISUPR
64
53
80
66
mA
2 Wait Current, -40°C < TJ < 150°C, fbus= 50MHz
ZVMC256
Other devices
ISUPW
50
42
66
55
mA
3 Run Current, TJ =175°C, fbus= 40MHz
ZVMC256
Other devices
ISUPR
TBD
45
TBD
55
mA
4 Wait Current, TJ = 175°C, fbus= 40MHz
ZVMC256
Other devices
ISUPW
TBD
36
TBD
45
mA
Table A-19. Stop Current Characteristics
Conditions are: VSUP=12 V(1) (2)
Num C Rating(3) Symbol Min Typ Max Unit
Stop Current all modules off
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
882 Freescale Semiconductor
A.1.13 ADC Calibration Configuration
The reference voltage VBG is measured under the conditions shown in Table A-21. The values stored in
the IFR are the average of eight consecutive conversions at Tj=150 °C and eight consecutive conversions
at Tj=-40 °C. The code is executed from RAM. The result is programmed to the IFR, otherwise there is no
flash activity.
1TA = TJ= -40°C
ZVMC256
Other devices
ISUPS
25
20
40
35
A
2T
A = TJ= 150C
ZVMC256
Other devices
ISUPS
800
350
2400
1050
A
3T
A = TJ = 25C
ZVMC256
Other devices
ISUPS
32
25
50
40
A
4T
A = TJ = 85C
ZVMC256
Other devices
ISUPS
120
95
A
5T
A = TJ = 105C
ZVMC256
Other devices
ISUPS
140
105
250
A
Stop Current API enabled & LINPHY in standby
6T
A = TJ = 25C
ZVMC256
Other devices
ISUPS
TBD
35
TBD
45
A
1. This is the total current flowing into the VSUP and HD pins. HD is the LINPHY supply on masksets 0N95G, 1N95G
2. Stop current values for ZVMC256 are subject to change following characterization.
3. If MCU is in Stop mode long enough then TA = TJ . Die self heating due to stop current can be ignored.
Table A-20. Pseudo Stop Current Characteristics
Conditions are: VSUP=12V, API, COP & RTI enabled
Num C Rating Symbol Min Typ Max Unit
1T
J = 25C
ZVMC256
Other devices
ISUPPS
TBD
265
TBD
300
A
Table A-19. Stop Current Characteristics
Conditions are: VSUP=12 V(1) (2)
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 883
Table A-21. Measurement Conditions
Description Symbol Value Unit
Regulator Supply Voltage at VSUP VSUP 5V
Supply Voltage at VDDX and VDDA VDDX,A 5V
ADC reference voltage high VRH 5V
ADC reference voltage low VRL 0V
ADC clock fATDCLK 2MHz
ADC sample time tSMP 4 ADC clock cycles
Bus clock frequency fbus 48 MHz
Junction temperature Tj-40 and 150 C
Appendix A MCU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
884 Freescale Semiconductor
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 885
Appendix B
CPMU Electrical Specifications (VREG, OSC, IRC, PLL)
B.1 VREG Electrical Specifications
Table B-1. Voltage Regulator Electrical Characteristics
(Junction Temperature From –40C To +175C unless otherwise stated)
Note: VDDA and VDDX must be shorted on the application board.
Num C Characteristic Symbol Min Typical Max Unit
1 Input Voltages VSUP 3.5 4 0 V
2 Output Voltage Core
Full Performance Mode
Reduced Power Mode (stop mode)
VDD 1.72
1.84
1.6
1.98
V
V
3 Output Voltage Flash
Full Performance Mode
Reduced Power Mode (stop mode)
VDDF 2.6
2.82
1.6
2.9
V
V
4a Output Voltage VDDX (with external PNP, ZVMC256)
Full Performance Mode VSUP > =6V
Full Performance Mode 5.5V <= VSUP <=6V
Full Performance Mode 3.5V <= VSUP <=5.5V
Reduced Performance Mode (stop) VSUP > =3.5V
VDDX 4.90
4.50
3.13
2.5
5.0
5.0
5.5
5.10
5.10
5.10
5.75
V
V
V
V
4b Output Voltage VDDX (with external PNP, other parts)
Full Performance Mode VSUP > =6V
Full Performance Mode 5.5V <= VSUP <=6V
Full Performance Mode 3.5V <= VSUP <=5.5V
Reduced Performance Mode (stop) VSUP > =3.5V
VDDX 4.85
4.50
3.13
2.5
5.0
5.0
5.5
5.15
5.15
5.15
5.75
V
V
V
V
4c Output Voltage VDDX (without external PNP)(1)
Full Performance Mode VSUP > =6V
Full Performance Mode 5.5V <= VSUP <=6V
Full Performance Mode 3.5V <= VSUP <=5.5V
Reduced Performance Mode (stop) VSUP > =3.5V
VDDX 4.80
4.50
3.13
2.5
4.95
4.95
5.5
5.10
5.10
5.10
5.75
V
V
V
V
4d VDDX dependence on temperature and VSUP input
VSUP > 6V. No external PNP.
VDDX —5080mV
5a Load Current VDDX(2)(3) without external PNP
Full Performance Mode, VSUP > 6V, -40C < TJ < 150CI
DDX 0—70mA
5b Load Current VDDX(2)(3) without external PNP
Full Performance Mode VSUP > 6V
Full Performance Mode 3.5V <= VSUP <=6V
Reduced Performance Mode (stop) VSUP > =3.5V
IDDX 0
0
0
55
20
5
mA
mA
mA
Appendix B CPMU Electrical Specifications (VREG, OSC, IRC, PLL)
MC9S12ZVM Family Reference Manual Rev. 2.2
886 Freescale Semiconductor
5c Load Current VDDX(2)(3) without external PNP
Full Performance Mode 3.5V <= VSUP <=6V
-40C < TJ < 150C
IDDX 0—25mA
5d Short Circuit VDDX fall back current VDDX <=0.5V IDDX 100 mA
6 Output Voltage VDDC with external PNP(4)
Full Performance Mode VSUP > =6V
Full Performance Mode 5.5V <= VSUP <=6V
Full Performance Mode 3.5V <= VSUP <=5.5V
Reduced Performance Mode (stop) VSUP > =3.5V
VDDC 4.85
4.50
3.13
2.5
5.0
5.0
5.5
5.15
5.15
5.15
5.75
V
V
V
V
7 Load Current VDDC
Reduced Performance Mode (stop mode) IDDC 0—2.5mA
8 Low Voltage Interrupt Assert Level(5)
Low Voltage Interrupt Deassert Level
VLVIA
VLVID
4.04
4.19
4.23
4.38
4.40
4.49
V
V
9a VDDX Low Voltage Reset deassert(6) V
LVRXD 3.05 3.13 V
9b VDDX Low Voltage Reset assert (7) V
LVRXA 2.95 3.02 V
10 Trimmed ACLK output frequency fACLK —20—KHz
11 Trimmed ACLK internal clock f / fnominal (8) dfACLK - 6% + 6%
12 The first period after enabling the counter by APIFE
might be reduced by API start up delay
tsdel ——100s
13 Temperature Sensor Slope dVHT 4.8 5.05 5.3 mV/oC
14 Temperature Sensor output voltage (150oC) untrimmed VHT —2.33—V
15 High Temperature Interrupt Assert(9)
High Temperature Interrupt Deassert
THTIA
THTID
120
110
132
122
144
134
oC
oC
16 Bandgap output voltage VBG 1.14 1.20 1.28 V
17 Bandgap output voltage VSUP dependency
3.5 < VSUP < 18V
VBGV -5(10) —5
(10) mV
18 Bandgap output voltage temperature dependency
VSUP =12V, -40C < TJ < 150C
VBGT -20(10) —20
(10) mV
19a Max. Base Current For External PNP (VDDX)(11)
-40C < TJ < 150C
IBCTLMAX 2.3 mA
19b Max. Base Current For External PNP (VDDX)(11)
150C < TJ < 175C
IBCTLMAX 1.5 mA
20a Max. Base Current For External PNP (VDDC)(11)
-40C < TJ < 150C
IBCTLCMAX 2.3 mA
20b Max. Base Current For External PNP (VDDC)(11)
150C < TJ < 175C
IBCTLCMAX 1.5 mA
Table B-1. Voltage Regulator Electrical Characteristics
(Junction Temperature From –40C To +175C unless otherwise stated)
Note: VDDA and VDDX must be shorted on the application board.
Num C Characteristic Symbol Min Typical Max Unit
Appendix B CPMU Electrical Specifications (VREG, OSC, IRC, PLL)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 887
Table B-2. VDDS Regulators (ZVMC256 only. Preliminary until characterized)
B.2 Reset and Stop Timing Characteristics
Table B-3. Reset and Stop Timing Characteristics
1. External PNP regulator has a higher regulation point to ensure that the current flows through the PNP when the application
fails to disable the internal regulator by clearing INTXON.
2. Please note that the core current is derived from VDDX
3. Further limitation may apply due to maximum allowable TJ
4. Maximum load current depends on the current gain of the external PNP and available base current
5. LVI is monitored on the VDDA supply domain
6. LVRX is monitored on the VDDX supply domain only active during full performance mode. During reduced performance mode
(stop mode) voltage supervision is solely performed by the POR block monitoring core VDD.
7. For the given maximum load currents and VSUP input voltages, the MCU will stay out of reset.
8. The ACLK trimming must be set that the minimum period equals to 0.2ms
9. CPMUHTTR=0x88
10. This parameter value is subject to change following further characterization.
11. This is the minimum base current that can be guaranteed when the external PNP is delivering maximum current.
Num C Characteristic Symbol Min Typ Max Unit
1 VDDS to VDDA differential (with external PNP)(1)
Full Performance Mode only (disabled in RPM)
-40C < TJ < 150C
1. Measured directly at VDDS/VDDA pins. Static load current on VDDS.
VDDS —075mV
2a Max. Base Current For External PNP (VDDS)(2)
-40C < TJ < 150C
2. This is the minimum base current that can be guaranteed when the external PNP is delivering maximum current.
IBCTLSMAX 2.3 mA
2b Max. Base Current For External PNP (VDDS)
150C < TJ < 175C
IBCTLSMAX 1.5 mA
3 VDDS monitor under voltage assert VDDSMA VDDS
-0.2
—V
4 VDDS monitor under voltage de-assert VDDSMD VDDS
-0.2
—V
5 SNPS monitor threshold (VSNPS - VDDS)V
SNPSM 80 100 140 mV
Num C Rating Symbol Min Typ Max Unit
1a Startup from Reset (normal mode). ZVMC256 nSTARTUP 402 510 tbus
1a Startup from Reset (normal mode). All devices except ZVMC256 nSTARTUP 396 504 tbus
1b Startup from Reset (special mode) nSTARTUP 555 555 tbus
2 Recovery time from STOP tSTP_REC —23 s
Appendix B CPMU Electrical Specifications (VREG, OSC, IRC, PLL)
MC9S12ZVM Family Reference Manual Rev. 2.2
888 Freescale Semiconductor
B.3 IRC and OSC Electrical Specifications
Table B-4. IRC electrical characteristics
Table B-5. OSC electrical characteristics (Junction Temperature From –40C To +175C)
B.4 Phase Locked Loop
B.4.1 Jitter Information
With each transition of the feedback clock, the deviation from the reference clock is measured and the
input voltage to the VCO is adjusted accordingly.The adjustment is done continuously with no abrupt
changes in the VCOCLK frequency. Noise, voltage, temperature and other factors cause slight variations
in the control loop resulting in a clock jitter. This jitter affects the real minimum and maximum clock
periods as illustrated in Figure B-1..
Num C Rating Symbol Min Typ Max Unit
1a Junction Temperature - 40 to 150 Celsius
Internal Reference Frequency, factory trimmed
fIRC1M_TRIM 0.9895 1.002 1.0145 MHz
1b Junction Temperature 150 to 175 Celsius
Internal Reference Frequency, factory trimmed
fIRC1M_TRIM 0.9855 1.0145 MHz
Num C Rating Symbol Min Typ Max Unit
1 Nominal crystal or resonator frequency fOSC 4.0 20 MHz
2 Startup Current iOSC 100 A
3a Oscillator start-up time (4MHz)(1)
1. These values apply for carefully designed PCB layouts with capacitors that match the crystal/resonator requirements.
tUPOSC —210ms
3b Oscillator start-up time (8MHz)1tUPOSC —1.68ms
3c Oscillator start-up time (16MHz)1tUPOSC —15ms
3d Oscillator start-up time (20MHz)1tUPOSC —14ms
4 Clock Monitor Failure Assert Frequency fCMFA 200 450 1200 KHz
5 Input Capacitance (EXTAL, XTAL pins) CIN —7pF
6 EXTAL Pin Input Hysteresis VHYS,EXTAL —120mV
7 EXTAL Pin oscillation amplitude (loop controlled
Pierce)
VPP,EXTAL —1.0V
8 EXTAL Pin oscillation required amplitude(2)
2. Needs to be measured at room temperature on the application board using a probe with very low (<=5pF) input capacitance.
VPP,EXTAL 0.8 1.5 V
Appendix B CPMU Electrical Specifications (VREG, OSC, IRC, PLL)
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 889
Figure B-1. Jitter Definitions
The relative deviation of tnom is at its maximum for one clock period, and decreases towards zero for larger
number of clock periods (N).
Defining the jitter as:
The following equation is a good fit for the maximum jitter:
Figure B-2. Maximum Bus Clock Jitter Approximation (N = number of bus cycles)
23 N-1N1
0
tnom
tmax1
tmin1
tmaxN
tminN
JN max 1
tmax N
Nt
nom
-----------------------
1
tmin N
Nt
nom
-----------------------
,



=
JN j1
NPOSTDIV 1+
--------------------------------------------------=
1 5 10 20 N
J(N)
Appendix B CPMU Electrical Specifications (VREG, OSC, IRC, PLL)
MC9S12ZVM Family Reference Manual Rev. 2.2
890 Freescale Semiconductor
NOTE
Peripheral module prescalers eliminate the effect of jitter to a large extent.
Table B-6. PLL Characteristics (Junction Temperature From –40C To +175C)
Conditions are 4.5 V < VDDX< 5.5 V unless otherwise noted
Num C Rating Symbol Min Typ Max Unit
1 VCO frequency during system reset fVCORST 8—32MHz
2 VCO locking range fVCO 32 100 MHz
3 Reference Clock fREF 1—MHz
4 Lock Detection Threshold Lock|0 1.5%
(1)
1. % deviation from target frequency
5 Un-Lock Detection Threshold unl| 0.5 2.5 %1
6 Time to lock tlock 150 +
256/fREF
s
7a Jitter fit parameter 1(2), 40C < TJ < 150C
2. fREF = 1MHz, fBUS = 50MHz
j1—— 2%
7b Jitter fit parameter 1, 150C < TJ < 175Cj
1—— 2%
8 PLL Clock Monitor Failure assert frequency fPMFA 0.45 1.1 1.6 MHz
Appendix C ADC Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 891
Appendix C
ADC Electrical Specifications
This section describes the characteristics of the analog-to-digital converter.
NOTE: ADC1 is only tested to 10-bit accuracy in the 48LQFP-EP package options.
NOTE: VRL_0 is the preferred reference for low noise.
C.1 ADC Operating Characteristics
The Table C-1 shows conditions under which the ADC operates.
The following constraints exist to obtain full-scale, full range results:
VSSA VRLVINVRHVDDA
This constraint exists since the sample buffer ampl ifier can not drive beyond the power supply levels that
it ties to. If the input level goes outside of this range it will effectively be clipped.
Table C-1. ADC Operating Characteristics
Supply voltage 4.5 V < VDDA < 5.5 V, Junction Temperature From –40×oC To +175oC
Num C Rating Symbol Min Typ Max Unit
1 Reference potential
Low
High
VRL
VRH
VSSA
VDDA/2
VDDA/2
VDDA
V
V
2 Voltage difference VDDX to VDDA VDDX -0.1 0 0.1 V
3 Voltage difference VSSX to VSSA VSSX –0.1 0 0.1 V
4 Differential reference voltage(1)
1. Full accuracy is not guaranteed when differential voltage is less than 4.50 V
VRH-VRL 3.13 5.0 5.5 V
5 ADC Clock Frequency (derived from bus clock via the
prescaler).
fATDCLK 0.25 8.33 MHz
6 Buffer amplifier turn on time (delay after module
start/recovery from Stop mode)
tREC —— 1s
7 ADC disable time tDISABLE —— 3bus
clock
cycles
8
ADC Conversion Period (2)
12 bit resolution:
10 bit resolution:
8 bit resolution:
2. The minimum time assumes a sample time of 4 ATD clock cycles. The maximum time assumes a sample time of 24 ATD clock
cycles.
NCONV12
NCONV10
NCONV8
19
18
16
39
38
36
ADC
clock
cycles
Appendix C ADC Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
892 Freescale Semiconductor
C.1.1 Factors Influencing Accuracy
Source resistance, source capacitance and current injection have an influence on the accuracy of the ADC
.Figure C-1. A further factor is that PortAD pins that are configured as output drivers switching.
C.1.1.1 Port AD Output Drivers Switching
PortAD output drivers switching can adversely affect the ADC accuracy whilst converting the analog
voltage on other PortAD pins because the output drivers are supplied from the VDDA/VSSA ADC supply
pins. Although internal design measures are implemented to minimize the ef fect of output driver noise, it
is recommended to configure PortAD pins as outputs only for low frequency , low load outputs. The impact
on ADC accuracy is load dependent and not specified. The values specified are valid under condition that
no PortAD output drivers switch during conversion.
C.1.1.2 Source Resistance
Due to the input pin leakage current as specified in conjunction with the source resistance there will be a
voltage drop from the signal source to the ADC input. The maximum source resistance RS specifies results
in an error (10-bit resolution) of less than 1/2 LSB (2.5 mV) at the maximum leakage current. If device or
operating conditions are less than worst case or leakage induced error is acceptable, larger values of source
resistance of up to 10Kohm are allowed.
C.1.1.3 Source Capacitance
When sampling an additional internal capacitor is switched to the input. This can cause a voltage drop due
to charge sharing with the external and the pin capacitance. For a maximum sampling error of the input
voltage 1LSB (10-bit resolution), then the external filter capacitor, Cf 1024 * (CINS–CINN).
C.1.1.4 Current Injection
There are two cases to consider.
1. A current is injected into the channel being converted. The channel being stressed has conversion
values of 0x3FF (in 10-bit mode) for analog inputs greater than VRH and 0x000 for values less than
VRL unless the current is higher than specified as a disruptive condition.
2. Current is injected into pins in the neighborhood of the channel being converted. A portion of this
current is picked up by the channel (coupling ratio K), This additional current impacts the accuracy
of the conversion depending on the source resistance.
The additional input voltage error on the converted channel can be calculated as:
VERR = K * RS * IINJ
with IINJ being the sum of the currents injected into the two pins adjacent to the converted channel.
Appendix C ADC Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 893
Figure C-1.
Table C-2. ADC Electrical Characteristics (Junction Temperature From –40C To +175C)
Supply voltage 3.13 V < VDDA < 5.5 V
Num C Rating Symbol Min Typ Max Unit
1 Max input source resistance RS—— 1K
2 Total input capacitance Non sampling
Total input capacitance Sampling
CINN
CINS
10
16
pF
3a Input internal Resistance
Junction temperature from –40×oC to +150oC
RINA —59.9k
3b Input internal Resistance
Junction temperature from 150oC to +175oC
RINA ——12k
4 Disruptive analog input current INA -2.5 2.5 mA
5 Coupling ratio positive current injection Kp——1E-4A/A
6 Coupling ratio negative current injection Kn——5E-3A/A
PADn
VDDA
VSSA
T
jmax
=150
o
C
I
leakp
< 1
A
I
leakn
< 1
A
C
bottom
3.7pF < S/H Cap < 6.2pF
(incl parasitics)
920
< R
INA
< 12K
(incl parasitics)
direct sampling time is 2 to 22 adc clock cycles of
0.25MHz to 8.34MHz -> 88
s >= tsample >= 240ns
Switch resistance depends on input voltage, corner ranges are shown.
Leakage current is guaranteed by specification.
connected to low ohmic
supply during sampling
C
top
+
-
sampling via buffer amp 2 adc clock cycles
Cstray < 1.8pF
Appendix C ADC Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
894 Freescale Semiconductor
C.1.2 ADC Accuracy
Table C-3. specifies the ADC conversion performance excluding any errors due to current injection,
input capacitance and source resistance.
C.1.2.1 ADC Accuracy Definitions
For the following definitions see also Figure C-2..
Differential non-linearity (DNL) is defined as the difference between two adjacent switching steps.
The integral non-linearity (INL) is defined as the sum of all DNLs:
DNL i ViVi1
1LSB
-------------------------- 1=
INL n DNL i
i1=
n
VnV0
1LSB
---------------------n==
Appendix C ADC Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 895
Figure C-2. ADC Accuracy Definitions
1
5Vin
mV
10 15 20 25 30 35 40 85 90 95 100 105 110 115 12065 70 75 8060
0
3
2
5
4
7
6
45
$3F7
$3F9
$3F8
$3FB
$3FA
$3FD
$3FC
$3FE
$3FF
$3F4
$3F6
$3F5
8
9
1
2
$FF
$FE
$FD
$3F3
10-Bit Resolution
8-Bit Resolution
Ideal Transfer Curve
10-Bit Transfer Curve
8-Bit Transfer Curve
55
10-Bit Absolute Error Boundary
8-Bit Absolute Error Boundary
LSB
Vi-1 Vi
DNL
5000 +
Appendix C ADC Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
896 Freescale Semiconductor
Table C-3. ADC Conversion Performance 5 V range (Junction Temperature From –40C To +150C)
Table C-4. ADC Conversion Performance 5 V range (Junction Temperature From 150C To +175C)
Supply voltage 4.5 V < VDDA < 5.5 V, 4.5V < VREF < 5.5 V. ( VREF= VRH - VRL ). fADCCLK = 8.0 MHz
The values are tested to be valid with no PortAD output drivers switching simultaneous with conversions.
Num C Rating(1)
1. The 8-bit and 10-bit mode operation is structurally tested in production test. Absolute values are tested in 12-bit mode.
Symbol Min Typ Max Unit
1 Resolution (VREF = 5.12V) 12-Bit LSB 1.25 mV
2 Differential Nonlinearity 12-Bit DNL -4 2 4 counts
3 Integral Nonlinearity 12-Bit INL -5 2.5 5 counts
4 Absolute Error(2)
2. These values include the quantization error which is inherently 1/2 count for any A/D converter.
12-Bit AE -7 4 7 counts
5 Resolution (VREF = 5.12V) 10-Bit LSB 5 mV
6 Differential Nonlinearity 10-Bit DNL -1 0.5 1 counts
7 Integral Nonlinearity 10-Bit INL -2 1 2 counts
8 Absolute Error 10-Bit AE -3 2 3 counts
9 Resolution (VREF = 5.12V) 8-Bit LSB 20 mV
10 Differential Nonlinearity 8-Bit DNL -0.5 0.3 0.5 counts
11 Integral Nonlinearity 8-Bit INL -1 0.5 1 counts
12 Absolute Error 8-Bit AE -1.5 1 1.5 counts
Supply voltage 4.5 V < VDDA < 5.5 V, 4.5V < VREF < 5.5 V. ( VREF= VRH - VRL ). fADCCLK = 8.0 MHz
The values are tested to be valid with no PortAD output drivers switching simultaneous with conversions.
Num C Rating(1)
1. The 8-bit and 10-bit mode operation is structurally tested in production test. Absolute values are tested in 12-bit mode.
Symbol Min Typ Max Unit
1 Resolution (VREF = 5.12V) 12-Bit LSB 1.25 mV
2 Differential Nonlinearity 12-Bit DNL -4 2 4 counts
3 Integral Nonlinearity 12-Bit INL -5 2.5 5 counts
4 Absolute Error(2)
2. These values include the quantization error which is inherently 1/2 count for any A/D converter.
12-Bit AE -7 4 7 counts
5 Resolution (VREF = 5.12V) 10-Bit LSB 5 mV
6 Differential Nonlinearity 10-Bit DNL -1 0.5 1 counts
7 Integral Nonlinearity 10-Bit INL -2 1 2 counts
8 Absolute Error 10-Bit AE -3 2 3 counts
9 Resolution (VREF = 5.12V) 8-Bit LSB 20 mV
10 Differential Nonlinearity 8-Bit DNL -0.5 0.3 0.5 counts
11 Integral Nonlinearity 8-Bit INL -1 0.5 1 counts
12 Absolute Error 8-Bit AE -1.5 1 1.5 counts
Appendix D LIN/HV PHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 897
Appendix D
LIN/HV PHY Electrical Specifications
D.1 Static Electrical Characteristics
Table D-1. Static electrical characteristics of the LIN/HV PHY (Junction Temperature From -40C To +175C)
Characteristics noted under conditions 5.5V <= VLINSUP <= 18V unless otherwise noted(1) (2) (3). Typical values noted reflect
the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
1. For 3.5V<= VLINSUP <5V, the LIN/HV PHY is still working but with degraded parametrics.
2. For 5V<= VLINSUP <5.5V, characterization showed that all parameters generally stay within the indicated specification, except
the duty cycles D2 and D4 which may increase and potentially go beyond their maximum limits for highly loaded buses.
3. The VLINSUP voltage is provided by the VLINSUP supply. This supply mapping is described in device level documentation.
Num C Ratings Symbol Min Typ Max Unit
1V
LINSUP range for LIN compliant electrical
characteristics
VLINSUP_LIN 5.51 2 12 18 V
2 Current limitation into the LIN pin in dominant state(4)
VLIN = VLINSUP_LIN_MAX
ILIN_LIM 40 200 mA
3 Input leakage current in dominant state, driver off,
internal pull-up on
(VLIN = 0V, VLINSUP = 12V)
ILIN_PAS_dom -1 mA
4 Input leakage current in recessive state, driver off
(5V<VLINSUP<18V, 5V<VLIN<18V, VLIN => VLINSUP )
ILIN_PAS_rec ——20A
5 Input leakage current when ground disconnected
(GNDDevice = VLINSUP, 0V<VLIN<18V, VLINSUP = 12V)
ILIN_NO_GND -1 1 mA
6 Input leakage current when battery disconnected
(VLINSUP = GND, 0<VLIN<18V)
ILIN_NO_BAT ——30A
7 Receiver dominant state VLINdom ——0.4V
LINSUP
8 Receiver recessive state VLINrec 0.6 VLINSUP
9V
LIN_CNT =(Vth_dom+ Vth_rec)/2 VLIN_CNT 0.475 0.5 0.525 VLINSUP
10 VHYS = Vth_rec -Vth_dom VHYS 0.175 VLINSUP
11 Maximum capacitance allowed on slave node Cslave 220 250 pF
12a Capacitance of LIN pin -40C < TJ < 150C,
Recessive state
Cint —20 pF
12b Capacitance of LIN pin -40C < TJ < 150C,
Recessive state
Cint ——45 pF
12c Capacitance of LIN pin 150C < TJ < 175C,
Recessive state
Cint ——39 pF
13 Internal pull-up (slave) Rslave 27 34 40 k
Appendix D LIN/HV PHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
898 Freescale Semiconductor
D.2 Dynamic Electrical Characteristics
Table D-2. Dynamic electrical characteristics of the LIN/HV PHY
4. At temperatures above 25C the current may be naturally limited by the driver, in this case the limitation circuit is not engaged
and the flag is not set.
Characteristics noted under conditions 5.5V V LINSUP 18 V unless otherwise noted(1) (2) (3). Typical values noted reflect
the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
Num C Ratings Symbol Min Typ Max Unit
1 Minimum duration of wake-up pulse generating a
wake-up interrupt
tWUFR 56 72 120 s
2 TxD-dominant timeout (in IRC clock periods) (4) tDTLIM 16388 16389 tIRC
3 Propagation delay of receiver trx_pd —— 6s
4 Symmetry of receiver propagation delay rising edge
w.r.t. falling edge
trx_sym -2 2 s
LIN PHYSICAL LAYER: DRIVER CHARACTERISTICS FOR NOMINAL SLEW RATE - 20.0KBIT/S
5 Rising/falling edge time (min to max / max to min) trise —6.5s
6 Over-current masking window (IRC trimmed at 1MHz) tOCLIM 15 16 s
7 M Duty cycle 1
THRec(max) = 0.744 x VLINSUP
THDom(max) = 0.581 x VLINSUP
VLINSUP = 5.5V...18V
tBit = 50us
D1 = tBus_rec(min) / (2 x tBit)
D1 0.396
(5) ——
8 M Duty cycle 2
THRec(min) = 0.422 x VLINSUP
THDom(min) = 0.284 x VLINSUP
VLINSUP = 5.5V...18V
tBit = 50us
D2 = tBus_rec(max) / (2 x tBit)
D2 0.5815
LIN PHYSICAL LAYER: DRIVER CHARACTERISTICS FOR SLOW SLEW RATE - 10.4KBIT/S
9 Rising/falling edge time (min to max / max to min) trise —13s
10 Over-current masking window (IRC trimmed at 1MHz) tOCLIM 31 32 s
11 M Duty cycle 3
THRec(max) = 0.778 x VLINSUP
THDom(max) = 0.616 x VLINSUP
VLINSUP = 5.5V...18V
tBit = 96us
D3 = tBus_rec(min) / (2 x tBit)
D3 0.4175——
Appendix D LIN/HV PHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 899
12 M Duty cycle 4
THRec(min) = 0.389 x VLINSUP
THDom(min) = 0.251 x VLINSUP
VLINSUP = 5.5V...18V
tBit = 96us
D4 = tBus_rec(max) / (2 x tBit)
D4 0.5905
LIN PHYSICAL LAYER: DRIVER CHARACTERISTICS FOR FAST MODE SLEW RATE - 100KBIT/S UP TO 250KBIT/S
13 Rising/falling edge time (min to max / max to min) trise —0.5s
14 Over-current masking window (IRC trimmed at 1MHz) tOCLIM 5—6s
1. For 3.5V<= VLINSUP <5V, the LIN/HV PHY is still working but with degraded parametrics.
2. For 5V<= VLINSUP <5.5V, characterization showed that all parameters generally stay within the indicated specification, except
the duty cycles D2 and D4 which may increase and potentially go beyond their maximum limits for highly loaded buses.
3. The VLINSUP voltage is provided by the VLINSUP supply. This supply mapping is described in device level documentation.
4. Can be disabled for the HV Phy version.
5. Does not apply to the HV Phy version.
Characteristics noted under conditions 5.5V V LINSUP 18 V unless otherwise noted(1) (2) (3). Typical values noted reflect
the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
Num C Ratings Symbol Min Typ Max Unit
Appendix D LIN/HV PHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
900 Freescale Semiconductor
Appendix E GDU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 901
Appendix E
GDU Electrical Specifications
NOTE
It is necessary to consider the power dissipa tio n of the FET channel versus
the power dissipation in the FET-Predriver.
FET-Predriver dissipation is Power VSUP x f(PWM) x C(FET-GATE)
FET channel power dissipation is a function of channel current and voltage.
Reducing the RDSON of the external FET to reduce the FET power
dissipation increases the FET gate capacitance.
At a certain FET level, further reduction of FET RDSON actually in creases
overall power consumption because the increased charging and dischar ging
power dissipation due to increased gate capacitance outweighs the FET
power reduction due to RDSON reduction.
E.1 GDU specifications for devices featuring GDU V4 or V6
Table E-1. GDU Electrical Characteristics (Junction Temperature From –40C To +175C)
4.85V<=VDDX,VDDA<=5.15V
Num C Characteristic Symbol Min Typ Max Unit
1 VSUP Supply range VVSUP -0.3 40 V
2a VSUP, HD Supply range FETs can be turned on(1)
(normal range)
VVSUP/VHD 71420V
2b VSUP, HD Supply range FETs can be turned on(2)
(extended range)
VVSUP/VHD 71426.6V
3 External FET Vgs drive with boost(3) (7V < VRBATP < 20V) VVGS 99.612V
4 External FET Vgs drive without boost(4) VVGS 59.612V
5 External FET total gate charge @ 10V(5) QG 75 nC
6 Highside desaturation threshold (8 steps of 0.15V) Vdesaths HD - 1.4 HD - 0.35 V
7a Lowside desaturation threshold (8 steps of 0.15V) Vdesatls 0.35 1.4 V
7b LD pin desaturation threshold (8 steps of 0.15V) (GDUV6 only) Vdesatls 0.35 1.4 V
8 Pull resistance between HGx and HSx RHSpul 60 80 120 
9 Pull resistance between LGx and LSx RLSpul 60 80 120 
10a VLS output voltage for Vsup >=12.5V, Iout=30mA
-40C < Tj < 150C
VVLS_OUT 10.5 11 11.5 V
10b VLS output voltage for Vsup >=12.5V, Iout=30mA
150C < Tj < 175C
VVLS_OUT 10.0 10.6 11.5 V
11 VLS current limit threshold ILIMVLS 60 77 100 mA
12a VLS low voltage monitor trippoint assert
(GDUV6 with GVLSLVL=1 or GDUV4)
VLVLSHA 6.2 6.5 7 V
12b VLS low voltage monitor trippoint deassert
(GDUV6 with GVLSLVL=1 or GDUV4)
VLVLSHD 6.2 6.58 7 V
12c VLS low voltage monitor trippoint assert
(GDUV6 with GVLSLVL=0)
VLVLSLA 5.2 5.5 6 V
Appendix E GDU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
902 Freescale Semiconductor
12d VLS low voltage monitor trippoint deassert
(GDUV6 with GVLSLVL=0)
VLVLSLD 5.2 5.55 6 V
13a HD high voltage monitor assert trippoint low VHVHDLA 20 21 22 V
13b HD high voltage monitor deassert trippoint low VHVHDLD 19.5 20.5 21.6 V
14a HD high voltage monitor assert trippoint high VHVHDHA 26.6 28.3 29.4 V
14b HD high voltage monitor deassert trippoint high VHVHDHD 26.2 27.9 29 V
15 HD high voltage monitor filter time constant(6) HVHD —2.7 4s
16 HG/LG turn on time vs 10nF load (fastest slew)(7) tHGON 120 190 340 ns
17 HG/LG turn on time vs 10nF load (slowest slew)(7) tHGON 350 560 980 ns
18a HG/LG turn off time vs 10nF load(8), -40C < Tj < 150Ct
HGOFF 55 90 180 ns
18b HG/LG turn off time vs 10nF load(8) , 150C < Tj < 175Ct
HGOFF 55 90 190 ns
19 PMF control to HG/LG start of turn on delay tdelon 0.52 0.75 0.98 s
20 PMF control to HG/LG start of turn off delay tdeloff 0.31 0.45 0.59 s
21 Minimum PMF driver on/off pulse width (fastest slew) tminpulse 2—s
22a VBS to HG, VLSx to LGx RDSon (driver on state)(9)
-40C < Tj < 150C
Rgduon 6.3 11.6
22b VBS to HG, VLSx to LGx RDSon (driver on state)(9)
150C < Tj < 175C
Rgduon 8.4 13.6
23a HGx to HSx, LGx to LSx RDSon (driver off state)(10)
nmos part, -40C < Tj < 150C
Rgduoffn —4 9
23b HGx to HSx, LGx to LSx RDSon (driver off state)(10) nmos part,
150C < Tj < 175C
Rgduoffn —711
24a HGx to HSx, LGx to LSx RDSon (driver off state)(11) pmos part,
-40C < Tj < 150C
Rgduoffp —1622
24b HGx to HSx, LGx to LSx RDSon (driver off state)(11)
pmos part, 150C < Tj < 175C
Rgduoffp —2026
25 VSUP boost turn on trip point VBSTON 9.5 10.1 10.6 V
26 VSUP boost turn off trip point VBSTOFF 9.75 10.3 10.8 V
27a Boost coil current limit (GDUBCL=0x0), -40C < Tj < 150CI
COIL0 80 190 350 mA
27b Boost coil current limit (GDUBCL=0x0), 150C < Tj < 175CI
COIL0 70 160 250 mA
28a Boost coil current limit (GDUBCL=0x8), -40C < Tj < 150CI
COIL8 230 380 640 mA
28b Boost coil current limit (GDUBCL=0x8), 150C < Tj < 175CI
COIL8 210 330 450 mA
29a Boost coil current limit (GDUBCL=0xF), -40C < Tj < 150CI
COIL15 370 530 870 mA
29b Boost coil current limit (GDUBCL=0xF), 150C < Tj < 175CI
COIL15 350 485 620 mA
30 Phase signal division ratio 3V < VHSx < 20V AHSDIV 5.7 6 6.3
31a HD signal division ratio 6V < VHD < 20V AHDDIV 4.9 5 5.1
31b HD signal division ratio through phase mux. AHDDIV —12—
32a CP driver RDSon highside(12), -40C < Tj < 150CR
CPHS —4490
32b CP driver RDSon highside(12), 150C < Tj < 175CR
CPHS —71100
33a CP driver RDSon lowside(12), -40C < Tj < 150CR
CPLS —11.530
33b CP driver RDSon lowside(12), 150C < Tj < 175CR
CPLS —2035
34 Current Sense Amplifier input voltage range (AMPP/AMPM) VCSAin 0 VDDA -
1.2
V
35 Current Sense Amplifier output voltage range VCSAout 0 VDDA V
Table E-1. GDU Electrical Characteristics (Junction Temperature From –40C To +175C)
4.85V<=VDDX,VDDA<=5.15V
Appendix E GDU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 903
E.2 Preliminary GDU specifications for devices featuring GDU V5
36 Current Sense Amplifier open loop gain AVCSA 100000
37 Current Sense Amplifier common mode rejection ratio CMRRCSA —400—
38 Current Sense Amplifier input offset VCSAoff -15 15 mV
39 Max effective Current Sense Amplifier output resistance [0.1V
.. VDDA - 0.2V]
RCSAout —— 2
40 Min Current Sense Amplifier output current
[0.1V .. VDDA - 0.2V](13) ICSAout -750 750 
41 Current Sense Amplifier large signal settling time tcslsst —2.9—s
42 Over Current Comparator filter time constant(14) OCC 3510s
43 Over Current Comparator threshold tolerance VOCCtt -75 75 mV
44 HD input current when GDU is enabled IHD —130 +
VHD/63K
—A
45 VLS regulator minimum RDSon (VSUP >= 6V) RVLSmin ——40
46 VCP to VBSx switch resistance RVCPVBS 600 1000
47 VBSx current whilst high side inactive IVBS ——310
1. Without using the boost option. The minimum level can be relaxed when the boost option is used. The lower limit is sensed on
VLS, the upper limit is sensed on HD.
2. Without using the boost option. The minimum level can be relaxed when the boost option is used. The lower limit is sensed on
VLS, the upper limit is sensed on HD. Operation beyond 20V is limited to 1 hour over lifetime of the device
3. For high side, the performance of external diodes may influence this parameter.
4. If VSUP is lower than 11.2V, external FET gate drive will diminish and roughly follow VSUP - 2* Vbe
5. Total gate charge spec is only a recommendation. FETs with higher gate charge can be used when resulting slew rates are
tolerable by the application and resulting power dissipation does not lead to thermal overload.
6. Blanking time for assert (maskset 1N95G)
7. (VBSx - HSx) = 10V respectively VLSx=10V, measured from 1V to 9V HGx/LGx vs HSx/LSx
8. (VBSx - HSx) = 10V respectively VLSx=10V, measured from 9V to 1V HGx/LGx vs HSx/LSx
9. V(VBSx) - V(VLSx) > 9V, resp VLSx > 9V
10. V(VBSx) - V(VLSx) > 9V, resp VLSx > 9V, nmos branch only
11. V(VBSx) - V(VLSx) > 9V, resp VLSx > 9V, pmos branch only
12. VLS > 6V
13. Output current range for which the effective output resistance specification applies
14. Av=10, no frequency compensation in feedback network, 90% output swing
Table E-2. GDU Electrical Characteristics (Junction Temperature From –40C To +175C)
4.85V<=VDDX,VDDA<=5.15V
Num C Characteristic Symbol Min Typ Max Unit
1 VSUP Supply range VVSUP -0.3 40 V
2a VSUP, HD Supply range FETs can be turned on(1)
(normal range)
VVSUP/VHD 71420V
2b VSUP, HD Supply range FETs can be turned on(2)
(extended range)
VVSUP/VHD 71426.6V
3 External FET Vgs drive with boost(3) (7V < VRBATP < 20V) VVGS 99.612V
4 External FET Vgs drive without boost(4) VVGS 59.612V
Table E-1. GDU Electrical Characteristics (Junction Temperature From –40C To +175C)
4.85V<=VDDX,VDDA<=5.15V
Appendix E GDU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
904 Freescale Semiconductor
5 External FET total gate charge @ 10V(5) QG 50 nC
6 Highside desaturation threshold (8 steps of 0.15V) Vdesaths HD - 1.4 HD - 0.35 V
7 Lowside desaturation threshold (8 steps of 0.15V) Vdesatls 0.35 1.4 V
8 Pull resistance between HGx and HSx RHSpul 60 80 120 
9 Pull resistance between LGx and LSx RLSpul 60 80 120 
10a VLS output voltage for Vsup >=12.5V, Iout=30mA
-40C < Tj < 150C
VVLS_OUT 10.5 11 11.5 V
10b VLS output voltage for Vsup >=12.5V, Iout=30mA
150C < Tj < 175C
VVLS_OUT 10.0 10.6 11.5 V
11 VLS current limit threshold ILIMVLS 60 77 100 mA
12a VLS low voltage monitor trippoint assert (GVLSLVL=1) VLVLSHA 6.2 6.5 7 V
12b VLS low voltage monitor trippoint deassert (GVLSLVL=1) VLVLSHD 6.2 6.58 7 V
12c VLS low voltage monitor trippoint assert (GVLSLVL=0) VLVLSLA 5.2 5.5 6 V
12d VLS low voltage monitor trippoint deassert (GVLSLVL=0) VLVLSLD 5.2 5.55 6 V
13a HD high voltage monitor assert trippoint low VHVHDLA 20 21 22 V
13b HD high voltage monitor deassert trippoint low VHVHDLD 19.5 20.5 21.6 V
14a HD high voltage monitor assert trippoint high VHVHDHA 26.6 28.3 29.4 V
14b HD high voltage monitor deassert trippoint high VHVHDHD 26.2 27.9 29 V
15 HD high voltage monitor filter time constant(6) HVHD —2.7 4s
16 HG/LG turn on time vs 10nF load (fastest slew)(7) tHGON 150 275 550 ns
17 HG/LG turn on time vs 10nF load (slowest slew)(7) tHGON 740 1170 1800 ns
18a HG/LG turn off time vs 10nF load(8), -40C < Tj < 150Ct
HGOFF 60 120 230 ns
18b HG/LG turn off time vs 10nF load(8) , 150C < Tj < 175Ct
HGOFF 130 190 250 ns
19 PMF control to HG/LG start of turn on delay tdelon 0.350 0.8 1.26 s
20 PMF control to HG/LG start of turn off delay tdeloff 0.125 0.185 0.275 s
21 Minimum PMF driver on/off pulse width (fastest slew) tminpulse 2—s
22a VBS to HG, VLSx to LGx RDSon (driver on state)(9)
-40C < Tj < 150C
Rgduon 9.5 17.4
22b VBS to HG, VLSx to LGx RDSon (driver on state)(9)
150C < Tj < 175C
Rgduon 12.6 20.5
23a HGx to HSx, LGx to LSx RDSon (driver off state)(10)
nmos part, -40C < Tj < 150C
Rgduoffn —614
23b HGx to HSx, LGx to LSx RDSon (driver off state)(10) nmos
part, 150C < Tj < 175C
Rgduoffn —10.517
24a HGx to HSx, LGx to LSx RDSon (driver off state)(11) pmos
part, -40C < Tj < 150C
Rgduoffp —2435
24b HGx to HSx, LGx to LSx RDSon (driver off state)(11)
pmos part, 150C < Tj < 175C
Rgduoffp —3039.5
25 VSUP boost turn on trip point VBSTON 9.5 10.1 10.6 V
26 VSUP boost turn off trip point VBSTOFF 9.75 10.3 10.8 V
27a Boost coil current limit (GDUBCL=0x0), -40C < Tj < 150CI
COIL0 80 190 350 mA
27b Boost coil current limit (GDUBCL=0x0), 150C < Tj < 175CI
COIL0 70 160 250 mA
28a Boost coil current limit (GDUBCL=0x8), -40C < Tj < 150CI
COIL8 230 380 640 mA
28b Boost coil current limit (GDUBCL=0x8), 150C < Tj < 175CI
COIL8 210 330 450 mA
Table E-2. GDU Electrical Characteristics (Junction Temperature From –40C To +175C)
4.85V<=VDDX,VDDA<=5.15V
Appendix E GDU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 905
29a Boost coil current limit (GDUBCL=0xF), -40C < Tj < 150CI
COIL15 370 530 870 mA
29b Boost coil current limit (GDUBCL=0xF), 150C < Tj < 175CI
COIL15 350 485 620 mA
30 Phase signal division ratio 3V < VHSx < 20V AHSDIV 5.7 6 6.3
31a HD signal division ratio 6V < VHD < 20V AHDDIV 4.9 5 5.1
31b HD signal division ratio through phase mux. AHDDIV —12—
32a CP driver RDSon highside(12), -40C < Tj < 150CR
CPHS —4490
32b CP driver RDSon highside(12), 150C < Tj < 175CR
CPHS —71100
33a CP driver RDSon lowside(12), -40C < Tj < 150CR
CPLS —11.530
33b CP driver RDSon lowside(12), 150C < Tj < 175CR
CPLS —2035
34 Current Sense Amplifier input voltage range
(AMPP/AMPM)
VCSAin 0 VDDA -
1.2
V
35 Current Sense Amplifier output voltage range VCSAout 0 VDDA V
36 Current Sense Amplifier open loop gain AVCSA 100000
37 Current Sense Amplifier common mode rejection ratio CMRRCSA —400—
38 Current Sense Amplifier input offset VCSAoff -15 15 mV
39 Max effective Current Sense Amplifier output resistance
[0.1V .. VDDA - 0.2V]
RCSAout —— 2
40 Min Current Sense Amplifier output current
[0.1V .. VDDA - 0.2V](13) ICSAout -750 750 
41 Current Sense Amplifier large signal settling time tcslsst —2.9—s
42 Over Current Comparator filter time constant(14) OCC 3510s
43 Over Current Comparator threshold tolerance VOCCtt -75 75 mV
44 HD input current when GDU is enabled IHD —130 +
VHD/63K
—A
45 VLS regulator minimum RDSon (VSUP >= 6V) RVLSmin ——40
46 VCP to VBSx switch resistance RVCPVBS 600 1000
47 VBSx current whilst high side inactive IVBS TBD 260 TBD 
1. Without using the boost option. The minimum level can be relaxed when the boost option is used. The lower limit is sensed on
VLS, the upper limit is sensed on HD.
2. Without using the boost option. The minimum level can be relaxed when the boost option is used. The lower limit is sensed on
VLS, the upper limit is sensed on HD. Operation beyond 20V is limited to 1 hour over lifetime of the device
3. For high side, the performance of external diodes may influence this parameter.
4. If VSUP is lower than 11.2V, external FET gate drive will diminish and roughly follow VSUP - 2* Vbe
5. Total gate charge spec is only a recommendation. FETs with higher gate charge can be used when resulting slew rates are
tolerable by the application and resulting power dissipation does not lead to thermal overload.
6. Blanking time for assert (maskset 1N95G)
7. (VBSx - HSx) = 10V respectively VLSx=10V, measured from 1V to 9V HGx/LGx vs HSx/LSx
8. (VBSx - HSx) = 10V respectively VLSx=10V, measured from 9V to 1V HGx/LGx vs HSx/LSx
9. V(VBSx) - V(VLSx) > 9V, resp VLSx > 9V
10. V(VBSx) - V(VLSx) > 9V, resp VLSx > 9V, nmos branch only
11. V(VBSx) - V(VLSx) > 9V, resp VLSx > 9V, pmos branch only
12. VLS > 6V
13. Output current range for which the effective output resistance specification applies
14. Av=10, no frequency compensation in feedback network, 90% output swing
Table E-2. GDU Electrical Characteristics (Junction Temperature From –40C To +175C)
4.85V<=VDDX,VDDA<=5.15V
Appendix E GDU Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
906 Freescale Semiconductor
Appendix F NVM Electrical Parameters
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 907
Appendix F
NVM Electrical Parameters
F.1 NVM Timing Parameters
The time base for all NVM program or erase operations is derived from the bus clock using the FCLKDIV
register. The frequency of this derived clock must be set within the limits specified as fNVMOP. The NVM
module does not have any means to monitor the frequency and will not prevent program or erase operation
at frequencies above or below the specified minimum. When attempting to program or erase the NVM
module at a lower frequency, a full program or erase transition is not assured.
The device bus frequency, below which the flash wait states can be disabled, fWSTAT, is specified in the
device operating conditions table in Table A-6.
The following sections provide equations which can be used to determine the time required to execute
specific flash commands. All timing parameters are a function of the bus clock frequency, fNVMBUS. All
program and erase times are also a function of the NVM operating frequency, fNVMOP.
Timing parameters for the ZVMC128, ZVML128, ZVMC64, ZVML64 and ZVML32 devices are
specified in Table F-1 and Table F-2.
Timing parameters for the ZVML31, ZVM32 and ZVM16 are specified in Table F-3 and Table F-4.
Timing parameters for the ZVMC256 are specified in Table F-5
Appendix F NVM Electrical Parameters
MC9S12ZVM Family Reference Manual Rev. 2.2
908 Freescale Semiconductor
Table F-1. FTMRZ128K512 NVM Timing Characteristics (Junction Temperature From –40C To +150C)
Derivatives ZVML128, ZVMC128, ZVML64, ZVMC64, ZVML32
Num C Command fNVMOP
cycle
fNVMBUS
cycle Symbol Min(1)
1. Minimum times are based on maximum fNVMOP and maximum fNVMBUS
Typ(2)
2. Typical times are based on typical fNVMOP and typical fNVMBUS
Max(3)
3. Maximum times are based on typical fNVMOP and typical fNVMBUS plus aging
Worst
(4)
4. Worst times are based on minimum fNVMOP and minimum fNVMBUS plus aging
Unit
1 Bus frequency 1 fNVMBUS 1505050MHz
2 NVM Operating frequency 1 fNVMOP 0.8 1.0 1.05 1.05 MHz
3 Erase Verify All Blocks 0 33760 tRD1ALL 0.68 0.68 1.35 67.52 ms
4 Erase Verify Block (Pflash) 0 33320 tRD1BLK_P 0.67 0.67 1.33 66.64 ms
5 Erase Verify Block (EEPROM) 0 823 tRD1BLK_D 0.02 0.02 0.03 1.65 ms
6 Erase Verify P-Flash Section 0 505 tRD1SEC 0.01 0.01 0.04 2.02 ms
7 Read Once 0 481 tRDONCE 9.62 9.62 9.62 481.00 us
8 Program P-Flash (4 Word) 164 3077 tPGM_4 0.22 0.23 0.41 12.51 ms
9 Program Once 164 3054 tPGMONCE 0.22 0.23 0.23 3.26 ms
10 Erase All Blocks 100066 34223 tERSALL 95.99 100.75 101.43 193.53 ms
11 Erase Flash Block (Pflash) 100060 33681 tERSBLK_P 95.97 100.73 101.41 192.44 ms
12 Erase Flash Block (EEPROM) 100060 1154 tERSBLK_D 95.32 100.08 100.11 127.38 ms
13 Erase P-Flash Sector 20015 914 tERSPG 19.08 20.03 20.05 26.85 ms
14 Unsecure Flash 100066 34288 tUNSECU 95.99 100.75 101.44 193.66 ms
15 Verify Backdoor Access Key 0 493 tVFYKEY 9.86 9.86 9.86 493.00 us
16 Set User Margin Level 0 427 tMLOADU 8.54 8.54 8.54 427.00 us
17 Set Factory Margin Level 0 436 tMLOADF 8.72 8.72 8.72 436.00 us
18 Erase Verify EEPROM Sector 0 583 tDRD1SEC 0.01 0.01 0.05 2.33 ms
19 Program EEPROM (1 Word) 68 1657 tDPGM_1 0.10 0.10 0.20 6.71 ms
20 Program EEPROM (2 Word) 136 2660 tDPGM_2 0.18 0.19 0.35 10.81 ms
21 Program EEPROM (3 Word) 204 3663 tDPGM_3 0.27 0.28 0.50 14.91 ms
22 Program EEPROM (4 Word) 272 4666 tDPGM_4 0.35 0.37 0.65 19.00 ms
23 Erase EEPROM Sector 5015 810 tDERSPG 4.79 5.03 20.34 38.85 ms
24 Protection Override 0 475 tPRTOVRD 9.50 9.50 9.50 475.00 us
Appendix F NVM Electrical Parameters
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 909
Table F-2. FTMRZ128K512 NVM Timing Characteristics (Junction Temperature From 150C To 175C)
Derivatives ZVML128, ZVMC128, ZVML64, ZVMC64, ZVML32
Num C Command fNVMOP
cycle
fNVMBUS
cycle Symbol Min(1)
1. Minimum times are based on maximum fNVMOP and maximum fNVMBUS
Typ(2)
2. Typical times are based on typical fNVMOP and typical fNVMBUS
Max(3)
3. Maximum times are based on typical fNVMOP and typical fNVMBUS plus aging
Worst
(4)
4. Worst times are based on minimum fNVMOP and minimum fNVMBUS plus aging
Unit
1 Bus frequency 1 fNVMBUS 1404040MHz
2 NVM Operating frequency 1 fNVMOP 0.8 1.0 1.05 1.05 MHz
3 Erase Verify All Blocks 0 33760 tRD1ALL 0.84 0.84 1.69 67.52 ms
4 Erase Verify Block (Pflash) 0 33320 tRD1BLK_P 0.83 0.83 1.67 66.64 ms
5 Erase Verify Block (EEPROM) 0 823 tRD1BLK_D 0.02 0.02 0.04 1.65 ms
6 Erase Verify P-Flash Section 0 505 tRD1SEC 0.01 0.01 0.03 1.01 ms
7 Read Once 0 481 tRDONCE 12.03 12.03 12.03 481.00 us
8 Program P-Flash (4 Word) 164 3077 tPGM_4 0.23 0.24 0.47 12.51 ms
9 Program Once 164 3054 tPGMONCE 0.23 0.24 0.24 3.26 ms
10 Erase All Blocks 100066 34223 tERSALL 96.16 100.92 101.78 193.53 ms
11 Erase Flash Block (Pflash) 100060 33681 tERSBLK_P 96.14 100.90 101.74 192.44 ms
12 Erase Flash Block (EEPROM) 100060 1154 tERSBLK_D 95.32 100.09 100.12 127.38 ms
13 Erase P-Flash Sector 20015 914 tERSPG 19.08 20.04 20.06 26.85 ms
14 Unsecure Flash 100066 34288 tUNSECU 96.16 100.92 101.78 193.66 ms
15 Verify Backdoor Access Key 0 493 tVFYKEY 12.33 12.33 12.33 493.00 us
16 Set User Margin Level 0 427 tMLOADU 10.68 10.68 10.68 427.00 us
17 Set Factory Margin Level 0 436 tMLOADF 10.90 10.90 10.90 436.00 us
18 Erase Verify EEPROM Sector 0 583 tDRD1SEC 0.01 0.01 0.03 1.17 ms
19 Program EEPROM (1 Word) 68 1657 tDPGM_1 0.11 0.11 0.23 6.71 ms
20 Program EEPROM (2 Word) 136 2660 tDPGM_2 0.20 0.20 0.40 10.81 ms
21 Program EEPROM (3 Word) 204 3663 tDPGM_3 0.29 0.30 0.57 14.91 ms
22 Program EEPROM (4 Word) 272 4666 tDPGM_4 0.38 0.39 0.74 19.00 ms
23 Erase EEPROM Sector 5015 810 tDERSPG 4.80 5.04 20.40 38.85 ms
24 Protection Override 0 475 tPRTOVRD 11.88 11.88 11.88 475.00 us
Appendix F NVM Electrical Parameters
MC9S12ZVM Family Reference Manual Rev. 2.2
910 Freescale Semiconductor
Table F-3. FTMRZ32K128 NVM Timing Characteristics (Junction Temperature From –40C To +150C)
Derivatives ZVML31, ZVM32, ZVM16
Num C Command fNVMOP
cycle
fNVMBUS
cycle Symbol Min(1)
1. Minimum times are based on maximum fNVMOP and maximum fNVMBUS
Typ(2)
2. Typical times are based on typical fNVMOP and typical fNVMBUS
Max(3)
3. Maximum times are based on typical fNVMOP and typical fNVMBUS plus aging
Worst
(4)
4. Worst times are based on minimum fNVMOP and minimum fNVMBUS plus aging
Unit
1 Bus frequency 1 fNVMBUS 1505050MHz
2 NVM Operating frequency 1 fNVMOP 0.8 1.0 1.05 1.05 MHz
3 Erase Verify All Blocks 0 8992 tRD1ALL 0.18 0.18 0.36 17.98 ms
4 Erase Verify Block (Pflash) 0 8750 tRD1BLK_P 0.18 0.18 0.35 17.50 ms
5 Erase Verify Block (EEPROM) 0 631 tRD1BLK_D 0.01 0.01 0.03 1.26 ms
6 Erase Verify P-Flash Section 0 511 tRD1SEC 0.01 0.01 0.02 1.02 ms
7 Read Once 0 481 tRDONCE 9.62 9.62 9.62 481.00 us
8 Program P-Flash (4 Word) 164 3136 tPGM_4 0.22 0.23 0.41 12.75 ms
9 Program Once 164 3107 tPGMONCE 0.22 0.23 0.23 3.31 ms
10 Erase All Blocks 100066 9455 tERSALL 95.49 100.26 100.44 143.99 ms
11 Erase Flash Block (Pflash) 100060 9119 tERSBLK_P 95.48 100.24 100.42 143.31 ms
12 Erase Flash Block (EEPROM) 100060 970 tERSBLK_D 95.31 100.08 100.10 127.02 ms
13 Erase P-Flash Sector 20015 927 tERSPG 19.08 20.03 20.05 26.87 ms
14 Unsecure Flash 100066 9533 tUNSECU 95.49 100.26 100.45 144.15 ms
15 Verify Backdoor Access Key 0 493 tVFYKEY 9.86 9.86 9.86 493.00 us
16 Set User Margin Level 0 439 tMLOADU 8.78 8.78 8.78 439.00 us
17 Set Factory Margin Level 0 448 tMLOADF 8.96 8.96 8.96 448.00 us
18 Erase Verify EEPROM Sector 0 583 tDRD1SEC 0.01 0.01 0.02 1.17 ms
19 Program EEPROM (1 Word) 68 1678 tDPGM_1 0.10 0.10 0.20 6.80 ms
20 Program EEPROM (2 Word) 136 2702 tDPGM_2 0.18 0.19 0.35 10.98 ms
21 Program EEPROM (3 Word) 204 3726 tDPGM_3 0.27 0.28 0.50 15.16 ms
22 Program EEPROM (4 Word) 272 4750 tDPGM_4 0.35 0.37 0.65 19.34 ms
23 Erase EEPROM Sector 5015 817 tDERSPG 4.79 5.03 20.34 38.96 ms
24 Protection Override 0 475 tPRTOVRD 9.50 9.50 9.50 475.00 us
Appendix F NVM Electrical Parameters
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 911
Table F-4. FTMRZ32K128 NVM Timing Characteristics (Junction Temperature From 150C To +175C)
Derivatives ZVML31, ZVM32, ZVM16
Num C Command fNVMOP
cycle
fNVMBUS
cycle Symbol Min(1)
1. Minimum times are based on maximum fNVMOP and maximum fNVMBUS
Typ(2)
2. Typical times are based on typical fNVMOP and typical fNVMBUS
Max(3)
3. Maximum times are based on typical fNVMOP and typical fNVMBUS plus aging
Worst
(4)
4. Worst times are based on minimum fNVMOP and minimum fNVMBUS plus aging
Unit
1 Bus frequency 1 fNVMBUS 1404040MHz
2 NVM Operating frequency 1 fNVMOP 0.8 1.0 1.05 1.05 MHz
3 Erase Verify All Blocks 0 8992 tRD1ALL 0.22 0.22 0.45 17.98 ms
4 Erase Verify Block (Pflash) 0 8750 tRD1BLK_P 0.22 0.22 0.44 17.50 ms
5 Erase Verify Block (EEPROM) 0 631 tRD1BLK_D 0.02 0.02 0.03 1.26 ms
6 Erase Verify P-Flash Section 0 511 tRD1SEC 0.01 0.01 0.03 1.02 ms
7 Read Once 0 481 tRDONCE 12.03 12.03 12.03 481.00 us
8 Program P-Flash (4 Word) 164 3136 tPGM_4 0.23 0.24 0.48 12.75 ms
9 Program Once 164 3107 tPGMONCE 0.23 0.24 0.24 3.31 ms
10 Erase All Blocks 100066 9455 tERSALL 95.54 100.30 100.54 143.99 ms
11 Erase Flash Block (Pflash) 100060 9119 tERSBLK_P 95.52 100.29 100.52 143.31 ms
12 Erase Flash Block (EEPROM) 100060 970 tERSBLK_D 95.32 100.08 100.11 127.02 ms
13 Erase P-Flash Sector 20015 927 tERSPG 19.09 20.04 20.06 26.87 ms
14 Unsecure Flash 100066 9533 tUNSECU 95.54 100.30 100.54 144.15 ms
15 Verify Backdoor Access Key 0 493 tVFYKEY 12.33 12.33 12.33 493.00 us
16 Set User Margin Level 0 439 tMLOADU 10.98 10.98 10.98 439.00 us
17 Set Factory Margin Level 0 448 tMLOADF 11.20 11.20 11.20 448.00 us
18 Erase Verify EEPROM Sector 0 583 tDRD1SEC 0.01 0.01 0.03 1.17 ms
19 Program EEPROM (1 Word) 68 1678 tDPGM_1 0.11 0.11 0.24 6.80 ms
20 Program EEPROM (2 Word) 136 2702 tDPGM_2 0.20 0.20 0.41 10.98 ms
21 Program EEPROM (3 Word) 204 3726 tDPGM_3 0.29 0.30 0.58 15.16 ms
22 Program EEPROM (4 Word) 272 4750 tDPGM_4 0.38 0.39 0.75 19.34 ms
23 Erase EEPROM Sector 5015 817 tDERSPG 4.80 5.04 20.41 38.96 ms
24 Protection Override 0 475 tPRTOVRD 11.88 11.88 11.88 475.00 us
Appendix F NVM Electrical Parameters
MC9S12ZVM Family Reference Manual Rev. 2.2
912 Freescale Semiconductor
Table F-5. FTMRZ256K1KNVM Timing Characteristics (Junction Temperature From –40C To +150C)
Derivative ZVMC256
Num C Command fNVMOP
cycle
fNVMBUS
cycle Symbol Min(1)
1. Minimum times are based on maximum fNVMOP and maximum fNVMBUS
Typ(2)
2. Typical times are based on typical fNVMOP and typical fNVMBUS
Max(3)
3. Maximum times are based on typical fNVMOP and typical fNVMBUS plus aging
Worst
(4)
4. Worst times are based on minimum fNVMOP and minimum fNVMBUS plus aging
Unit
1 Bus frequency 1 fNVMBUS 1505050MHz
2 NVM Operating frequency 1 fNVMOP 0.8 1.0 1.05 1.05 MHz
3 Erase Verify All Blocks 0 66973 tRD1ALL 1.34 1.34 2.68 133.95 ms
4 Erase Verify Block (Pflash) 0 66284 tRD1BLK_P 1.33 1.33 2.65 132.57 ms
5 Erase Verify Block (EEPROM) 0 1101 tRD1BLK_D 0.02 0.02 0.04 2.20 ms
6 Erase Verify P-Flash Section 0 640 tRD1SEC 0.01 0.01 0.03 1.28 ms
7 Read Once 0 512 tRDONCE 10.24 10.24 10.24 512.00 us
8 Program P-Flash (4 Word) 164 3221 tPGM_4 0.22 0.23 0.42 13.09 ms
9 Program Once 164 3138 tPGMONCE 0.22 0.23 0.23 3.34 ms
10 Erase All Blocks 200126 67786 tERSALL 191.95 201.48 202.84 385.73 ms
11 Erase Flash Block (Pflash) 200120 66855 tERSBLK_P 191.93 201.46 202.79 383.86 ms
12 Erase Flash Block (EEPROM) 100060 1401 tERSBLK_D 95.32 100.09 100.12 127.88 ms
13 Erase P-Flash Sector 20015 1022 tERSPG 19.08 20.04 20.06 27.06 ms
14 Unsecure Flash 200126 67864 tUNSECU 191.95 201.48 202.84 385.89 ms
15 Verify Backdoor Access Key 0 524 tVFYKEY 10.48 10.48 10.48 524.00 us
16 Set User Margin Level 0 477 tMLOADU 9.54 9.54 9.54 477.00 us
17 Set Factory Margin Level 0 486 tMLOADF 9.72 9.72 9.72 486.00 us
18 Erase Verify EEPROM Sector 0 613 tDRD1SEC 0.01 0.01 0.02 1.23 ms
19 Program EEPROM (1 Word) 68 1694 tDPGM_1 0.10 0.10 0.20 6.86 ms
20 Program EEPROM (2 Word) 136 2718 tDPGM_2 0.18 0.19 0.35 11.04 ms
21 Program EEPROM (3 Word) 204 3742 tDPGM_3 0.27 0.28 0.50 15.22 ms
22 Program EEPROM (4 Word) 272 4766 tDPGM_4 0.35 0.37 0.65 19.40 ms
23 Erase EEPROM Sector 5015 839 tDERSPG 4.79 5.03 20.35 39.34 ms
24 Protection Override 0 506 tPRTOVRD 10.12 10.12 10.12 506.00 us
Appendix F NVM Electrical Parameters
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 913
Table F-6. FTMRZ256K1KNVM Timing Characteristics (Junction Temperature From +150C To +175C)
Derivative ZVMC256
Num C Command fNVMOP
cycle
fNVMBUS
cycle Symbol Min(1)
1. Minimum times are based on maximum fNVMOP and maximum fNVMBUS
Typ(2)
2. Typical times are based on typical fNVMOP and typical fNVMBUS
Max(3)
3. Maximum times are based on typical fNVMOP and typical fNVMBUS plus aging
Worst
(4)
4. Worst times are based on minimum fNVMOP and minimum fNVMBUS plus aging
Unit
1 Bus frequency 1 fNVMBUS 1404040MHz
2 NVM Operating frequency 1 fNVMOP 0.8 1.0 1.05 1.05 MHz
3 Erase Verify All Blocks 0 66973 tRD1ALL 1.67 1.67 3.35 133.95 ms
4 Erase Verify Block (Pflash) 0 66284 tRD1BLK_P 1.66 1.66 3.31 132.57 ms
5 Erase Verify Block (EEPROM) 0 1101 tRD1BLK_D 0.03 0.03 0.06 2.20 ms
6 Erase Verify P-Flash Section 0 640 tRD1SEC 0.02 0.02 0.03 1.28 ms
7 Read Once 0 512 tRDONCE 12.80 12.80 12.80 512.00 us
8 Program P-Flash (4 Word) 164 3221 tPGM_4 0.24 0.24 0.49 13.09 ms
9 Program Once 164 3138 tPGMONCE 0.23 0.24 0.24 3.34 ms
10 Erase All Blocks 200126 67786 tERSALL 192.29 201.82 203.52 385.73 ms
11 Erase Flash Block (Pflash) 200120 66855 tERSBLK_P 192.26 201.79 203.46 383.86 ms
12 Erase Flash Block (EEPROM) 100060 1401 tERSBLK_D 95.33 100.10 100.13 127.88 ms
13 Erase P-Flash Sector 20015 1022 tERSPG 19.09 20.04 20.07 27.06 ms
14 Unsecure Flash 200126 67864 tUNSECU 192.29 201.82 203.52 385.89 ms
15 Verify Backdoor Access Key 0 524 tVFYKEY 13.10 13.10 13.10 524.00 us
16 Set User Margin Level 0 477 tMLOADU 11.93 11.93 11.93 477.00 us
17 Set Factory Margin Level 0 486 tMLOADF 12.15 12.15 12.15 486.00 us
18 Erase Verify EEPROM Sector 0 613 tDRD1SEC 0.02 0.02 0.03 1.23 ms
19 Program EEPROM (1 Word) 68 1694 tDPGM_1 0.11 0.11 0.24 6.86 ms
20 Program EEPROM (2 Word) 136 2718 tDPGM_2 0.20 0.20 0.41 11.04 ms
21 Program EEPROM (3 Word) 204 3742 tDPGM_3 0.29 0.29 0.58 15.22 ms
22 Program EEPROM (4 Word) 272 4766 tDPGM_4 0.38 0.39 0.75 19.40 ms
23 Erase EEPROM Sector 5015 839 tDERSPG 4.80 5.04 20.42 39.34 ms
24 Protection Override 0 506 tPRTOVRD 12.65 12.65 12.65 506.00 us
Appendix F NVM Electrical Parameters
MC9S12ZVM Family Reference Manual Rev. 2.2
914 Freescale Semiconductor
F.2 NVM Reliability Parameters
The reliability of the NVM blocks is guaranteed by stress test during qualification, constant process
monitors and burn-in to screen early life failures.
The data retention and program/erase cycling failure rates are specified at the operating conditions noted.
The program/erase cycle count on the sector is incremented every time a sector or mass erase event is
executed.
F.3 NVM Factory Shipping Condition
Devices are shipped from the factory with flash and EEPROM in the erased state. Data retention
specifications begin at time of this erase operation. For additional information on how Freescale defines
Typical Data Retention, please refer to Engineering Bulletin EB618.
Table F-7. NVM Reliability Characteristics
NUM C Rating Symbol Min Typ Max Unit
Program Flash Arrays
1 Data retention at an average junction temperature of TJavg = 85C(1)
after up to 10,000 program/erase cycles
1. TJavg does not exceed 85C in a typical temperature profile over the lifetime of a consumer, industrial or automotive application.
tNVMRET 20 100(2)
2. Typical data retention values are based on intrinsic capability of the technology measured at high temperature and de-rated to
25C using the Arrhenius equation. For additional information on how Freescale defines Typical Data Retention, please refer
to Engineering Bulletin EB618
Years
2 Program Flash number of program/erase cycles
(-40C Tj 175C
nFLPE 10K 100K(3)
3. Spec table quotes typical endurance evaluated at 25C for this product family. For additional information on how Freescale
defines Typical Endurance, please refer to Engineering Bulletin EB619.
Cycles
EEPROM Array
3 Data retention at an average junction temperature of TJavg = 85C1
after up to 100,000 program/erase cycles
tNVMRET 5100
2 Years
4 Data retention at an average junction temperature of TJavg = 85C1
after up to 10,000 program/erase cycles
tNVMRET 10 1002 Years
5 Data retention at an average junction temperature of TJavg = 85C1
after less than 100 program/erase cycles
tNVMRET 20 1002 Years
6 EEPROM number of program/erase cycles (-40C Tj 175CnFLPE 100K 500K3 Cycles
Appendix G BATS Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 915
Appendix G
BATS Electrical Specifications
G.1 Static Electrical Characteristics
Table G-1. Static Electrical Characteristics - BATS (Junction Temperature From -40C To +175C)
Characteristics noted under conditions 5.5V VSUP 18 V, unless otherwise noted. Typical values noted reflect the
approximate parameter mean at TA = 25°C(1) under nominal conditions unless otherwise noted.
1. TA: Ambient Temperature
Num C Ratings Symbol Min Typ Max Unit
1 Low Voltage Warning (LBI 1)
Assert (Measured on VSUP pin, falling edge)
Deassert (Measured on VSUP pin, rising edge)
Hysteresis (measured on VSUP pin)
VLBI1_A
VLBI1_D
VLBI1_H
4.75
5.5
0.4
6
6.5
V
V
V
2 Low Voltage Warning (LBI 2)
Assert (Measured on VSUP pin, falling edge)
Deassert (Measured on VSUP pin, rising edge)
Hysteresis (measured on VSUP pin)
VLBI2_A
VLBI2_D
VLBI2_H
6
6.75
0.4
7.25
7.75
V
V
V
3 Low Voltage Warning (LBI 3)
Assert (Measured on VSUP pin, falling edge)
Deassert (Measured on VSUP pin, rising edge)
Hysteresis (measured on VSUP pin)
VLBI3_A
VLBI3_D
VLBI3_H
7
7.75
0.4
8.5
9
V
V
V
4 Low Voltage Warning (LBI 4)
Assert (Measured on VSUP pin, falling edge)
Deassert (Measured on VSUP pin, rising edge)
Hysteresis (measured on VSUP pin)
VLBI4_A
VLBI4_D
VLBI4_H
8
9
0.4
10
10.5
V
V
V
5 High Voltage Warning (HBI 1)
Assert (Measured on VSUP pin, rising edge)
Deassert (Measured on VSUP pin, falling edge)
Hysteresis (measured on VSUP pin)
VHBI1_A
VHBI1_D
VHBI1_H
14.5
14
16.5
1.0
18
V
V
V
6 High Voltage Warning (HBI 2)
Assert (Measured on VSUP pin, rising edge)
Deassert (Measured on VSUP pin, falling edge)
Hysteresis (measured on VSUP pin)
VHBI2_A
VHBI2_D
VHBI2_H
25
24
27.5
1.0
30
V
V
V
7 Pin Input Divider Ratio(2)
RatioVSUP = VSUP / VADC
5.5V < VSUP < 29 V
2. VADC: Voltage accessible at the ADC input channel
RatioVSUP –9––
8 Analog Input Matching
Absolute Error on VADC
- compared to VSUP / RatioVSUP
AIMatching +-2% +-5%
Appendix G BATS Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
916 Freescale Semiconductor
G.2 Dynamic Electrical Characteristics
Table G-2. Dynamic Electrical Characteristics - (BATS).
Characteristics noted under conditions 5.5V VSUP 18 V, unless otherwise noted. Typical values noted reflect the
approximate parameter mean at TA = 25°C(1) under nominal conditions..
1. TA: Ambient Temperature
Num C Ratings Symbol Min Typ Max Unit
1 Enable Uncertainty Time TEN_UNC –1–us
2 Voltage Warning Low Pass Filter fVWLP_filter –0.5–Mhz
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 917
Appendix H
S12CANPHY Electrical Specifications
H.1 Maximum Ratings
H.2 Static Electrical Characteristics
Table H-1. Maximum Ratings
Characteristics noted under conditions 5.5V VSUP 18 V, -40°C TJ 150°C unless otherwise noted. Typical values
noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
Num Ratings Symbol Value Unit
1 DC voltage on CANL, CANH, SPLIT VBUS -32 to +40 V
2 Continuous current on CANH and CANL ILH 200 mA
3 ESD on CANH, CANL and SPLIT (HBM) VESDCH 4000 V
4 ESD on CANH, CANL (IEC61000-4, Czap = 150 pF,
Rzap = 330 )
VESDIEC 6000 V
Table H-2. Static Electrical Characteristics
Characteristics noted under conditions 5.5V VSUP 18 V, -40°C TJ 150°C unless otherwise noted. Typical values
noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
Num Ratings Symbol Min Typ Max Unit
CAN TRANSCEIVER CURRENT
1 Supply Current of CANPHY
Normal mode, Bus Recessive State
Normal mode, Bus Dominant State without Bus Load
Standby mode
Shutdown mode
IRES
IDOM
ISTB
ISDN
—1.7
3.8
0.022
0
—mA
PINS (CANH AND CANL)
2 Bus Pin Common Mode Voltage VCOM -12 12 V
3a Differential Input Voltage (Normal mode)
Recessive State at RXD
Dominant State at RXD
VCANH -
VCANL -1.0
0.9
—0.5
5.0
V
3b Differential Input Voltage (Standby mode)
Recessive State at RXD
Dominant State at RXD
VCANH -
VCANL -1.0
1.1
—0.4
5.0
V
4 Differential Input Hysteresis VHYS 175 mV
Appendix H S12CANPHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
918 Freescale Semiconductor
5 Input Resistance RIN 532.550k
6 Differential Input Resistance RIND 10 65 100 k
7 Common mode input resistance matching RINM -3 0 +3 %
8 CANH Output Voltage (RL = 60), (Normal mode)
TXD Dominant State
TXD Recessive State
VCANH
2.75
2.0
3.5
2.5
4.5
3.0
V
V
9 CANL Output Voltage (RL = 60), (Normal mode)
TXD Dominant State
TXD Recessive State
VCANL 0.5
2.0
1.5
2.5
2.25
3.0
V
V
10 Differential Output Voltage (RL = 60), (Normal mode)
TXD Dominant State
TXD Recessive State
VOH -
VOL
1.5
-0.5
2.0
0
3.0
0.05
V
V
11 CANH, CANL driver symmetry (Normal mode)
(VCANH + VCANL) / VDDC VSYM 0.9 1 1.1
12 Output Current Capability (Dominant State)
CANH
CANL
ICANH
ICANL
—55
55
—mA
mA
13 CANH, CANL Overcurrent Detection (Tj >=25oC)
CANH
CANL
ICANHOC
ICANLOC
70
70
85
85
100
100
mA
mA
14 CANH, CANL Output Voltage (no load, Standby mode)
CANH
CANL
VCANH
VCANL
-0.1
-0.1
0
0
0.1
0.1
V
V
15 CANH and CANL Input Current (Standby mode)
VCANH, VCANL from 0 V to 5.0 V
VCANH, VCANL = - 2.0 V
VCANH, VCANL = 7.0 V
ICAN1 ——20
-75
250
uA
uA
uA
16 CANH and CANL Input Current (Device unsupplied)
(VSUP tied to ground or left open)
VCANH, VCANL from 0V to 5 V
VCANH, VCANL = - 2.0 V
VCANH, VCANL = 7.0 V
ICAN2 ——10
-75
250
uA
uA
uA
17 CANH, CANL Input capacitance (Normal mode)
CANH
CANL
CCANH
CCANL
—14
16
—pF
pF
18 CANH to CANL differential capacitance (Normal mode) CHLDIFF —6—pF
DIAGNOSTIC INFORMATION (CANH AND CANL)
15 CANL to 0 V Threshold VL0 -0.75 -0.15 0 V
16 CANH to 0 V Threshold VH0 -0.75 -0.15 0 V
Table H-2. Static Electrical Characteristics
Characteristics noted under conditions 5.5V VSUP 18 V, -40°C TJ 150°C unless otherwise noted. Typical values
noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
Num Ratings Symbol Min Typ Max Unit
Appendix H S12CANPHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 919
17 CANL to 5.0 V Threshold VL5 VDDC VDDC
+0.15
VDDC
+ 0.75
V
18 CANH to 5.0 V Threshold VH5 VDDC VDDC
+0.15
VDDC
+0.75
V
SPLIT
19 Output voltage
Loaded condition ISPLIT= +/- 500 uA
Unloaded condition Rmeasure > 1 M
VSPLIT
0.3
0.45
0.5
0.5
0.7
0.55
VDDC
20 Leakage current
-12 V < VSPLIT < +12 V
-22 V < VSPLIT < +35 V
ILSPLIT
-
-
0
-
5
25
uA
uA
Table H-2. Static Electrical Characteristics
Characteristics noted under conditions 5.5V VSUP 18 V, -40°C TJ 150°C unless otherwise noted. Typical values
noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
Num Ratings Symbol Min Typ Max Unit
Appendix H S12CANPHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
920 Freescale Semiconductor
H.3 Dynamic Electrical Characteristics
Table H-3. Dynamic Electrical Characteristics
Characteristics noted under conditions 5.5V VSUP 18 V, -40°C TJ 150°C unless otherwise noted. Typical values
noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
Num Ratings Symbol Min Typ Max Unit
SIGNAL EDGE RISE AND FALL TIMES (CANH, CANL)
1 Propagation Loop Delay TXD to RXD (Recessive to
Dominant)
Slew Rate 6
Slew Rate 5
Slew Rate 4
Slew Rate 2
Slew Rate 1
Slew Rate 0
tLRD
—146
112
89
83
72
64 (255)
ns
2 Propagation Delay TXD to CAN (Recessive to
Dominant)
Slew Rate 6
Slew Rate 5
Slew Rate 4
Slew Rate 2
Slew Rate 1
Slew Rate 0
tTRD
—98
63
43
38
28
23
ns
3 Propagation Delay CAN to RXD (Recessive to
Dominant, using slew rate 0)
tRRD —42—ns
4 Propagation Loop Delay TXD to RXD (Dominant to
Recessive)
Slew Rate 6
Slew Rate 5
Slew Rate 4
Slew Rate 2
Slew Rate 1
Slew Rate 0
tLDR
—366
224
153
139
114
102 (255)
ns
5 Propagation Delay TXD to CAN (Dominant to
Recessive)
Slew Rate 6
Slew Rate 5
Slew Rate 4
Slew Rate 2
Slew Rate 1
Slew Rate 0
tTDR
—280
152
90
81
56
46
ns
6 Propagation Delay CAN to RXD (Dominant to
Recessive, using slew rate 0)
tRDR —56—ns
Appendix H S12CANPHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 921
7 Non-Differential Slew Rate (CANL or CANH)
Slew Rate 6
Slew Rate 5
Slew Rate 4
Slew Rate 2
Slew Rate 1
Slew Rate 0
tSL6
tSL5
tSL4
tSL2
tSL1
tSL0
—6
10
19
23
35
55
—V/µs
8 Bus Communication Rate tBUS 1.0 M bps
9 Settling time after entering Normal mode tCP_set ——10s
10 CPTXD-dominant timeout tCPTXDDT —2—ms
11 CANPHY wake-up dominant pulse filtered tCPWUP ——1.5s
12 CANPHY wake-up dominant pulse pass tCPWUP 5—s
Table H-3. Dynamic Electrical Characteristics
Characteristics noted under conditions 5.5V VSUP 18 V, -40°C TJ 150°C unless otherwise noted. Typical values
noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted.
Num Ratings Symbol Min Typ Max Unit
Appendix H S12CANPHY Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
922 Freescale Semiconductor
Appendix I SPI Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 923
Appendix I
SPI Electrical Specifications
This section provides electrical parametrics and ratings for the SPI.
In Figure I-1. the measurement conditions are listed.
I.1 Master Mode
In Figure I-2. the timing diagram for master mode with transmission format CPHA=0 is depicted.
Figure I-2. SPI Master Timing (CPHA=0)
In Figure I-3. the timing diagram for master mode with transmission format CPHA=1 is depicted.
Figure I-1. Measurement Conditions
Description Value Unit
Drive mode full drive mode
Load capacitance CLOAD(1),
on all outputs
1. Timing specified for equal load on all SPI output pins. Avoid asymmetric load.
50 pF
Thresholds for delay
measurement points (35% / 65%) VDDX V
SCK
(OUTPUT)
SCK
(OUTPUT)
MISO
(INPUT)
MOSI
(OUTPUT)
SS1
(OUTPUT)
1
9
5 6
MSB IN2
BIT 6 . . . 1
LSB IN
MSB OUT2LSB OUT
BIT 6 . . . 1
11
4
4
2
10
(CPOL 0)
(CPOL 1)
3
13
13
1. If enabled.
2. LSBFE = 0. For LSBFE = 1, bit order is LSB, bit 1, ..., bit 6, MSB.
12
12
Appendix I SPI Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
924 Freescale Semiconductor
Figure I-3. SPI Master Timing (CPHA=1)
Table I-1. SPI Master Mode Timing Characteristics (Junction Temperature From -40C To +175C)
Num C Characteristic Symbol Unit
Min Typ Max
1 SCK Frequency fsck 1/2048 12(1)(2)
1. See Figure I-4.
2. fbus max is 40MHz at temperatures above 150C
fbus
1SCK Period t
sck 2 2048 tbus
2 Enable Lead Time tlead —1/2—t
sck
3 Enable Lag Time tlag —1/2—t
sck
4 Clock (SCK) High or Low Time twsck —1/2—t
sck
5 Data Setup Time (Inputs) tsu 4—
ns
6 Data Hold Time (Inputs) thi 5—
ns
9 Data Valid after SCK Edge tvsck ——10
ns
10 Data Valid after SS fall (CPHA=0) tvss —— 9
ns
11 Data Hold Time (Outputs) tho -1.2 ns
12 Rise and Fall Time Inputs trfi —— 8
ns
13 Rise and Fall Time Outputs trfo —— 8
ns
SCK
(OUTPUT)
SCK
(OUTPUT)
MISO
(INPUT)
MOSI
(OUTPUT)
1
5 6
MSB IN2
BIT 6 . . . 1
LSB IN
MASTER MSB OUT2MASTER LSB OUT
BIT 6 . . . 1
4
4
9
12 13
11
(CPOL 0)
(CPOL 1)
SS1
(OUTPUT)
212 13 3
1. If enabled.
2. LSBFE = 0. For LSBFE = 1, bit order is LSB, bit 1, ..., bit 6, MSB.
Appendix I SPI Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 925
Figure I-4. Derating of maximum fSCK to fbus ratio in Master Mode
In Master Mode the allowed maximum fSCK to fbus ratio (= minimum Baud Rate Divisor, pls. see SPI
Block Guide) derates with increasing fbus, please see Figure I-4..
I.1.1 Slave Mode
In Figure I-1. the timing diagram for slave mode with transmission format CPHA=0 is depicted.
Figure I-5. SPI Slave Timing (CPHA=0)
In Figure I-6. the timing diagram for slave mode with transmission format CPHA=1 is depicted.
1/2
1/4
fSCK/fbus
fbus [MHz]
10 20 30 40
15 25 355
SCK
(INPUT)
SCK
(INPUT)
MOSI
(INPUT)
MISO
(OUTPUT)
SS
(INPUT)
1
9
5 6
MSB IN
BIT 6 . . . 1
LSB IN
SLAVE MSB SLAVE LSB OUT
BIT 6 . . . 1
11
4
4
2
7
(CPOL 0)
(CPOL 1)
3
13
NOTE: Not defined!
12
12
11
see
13
note
8
10
see
note
Appendix I SPI Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
926 Freescale Semiconductor
Figure I-6. SPI Slave Timing (CPHA=1)
Table I-2. SPI Slave Mode Timing Characteristics -40C to 175C
Num C Characteristic Symbol Unit
Min Typ Max
1 SCK Frequency fsck DC 14(1)
1. fbus max is 40MHz at temperatures above 150C
fbus
1SCK Period t
sck 4— t
bus
2 Enable Lead Time tlead 4— t
bus
3 Enable Lag Time tlag 4— t
bus
4 Clock (SCK) High or Low Time twsck 2tbus -
(trfi + trfo)
——ns
5 Data Setup Time (Inputs) tsu 3— ns
6 Data Hold Time (Inputs) thi 2— ns
7 Slave Access Time (time to data active) ta—— 28ns
8 Slave MISO Disable Time tdis —— 26ns
9a Data Valid after SCK Edge (-40C < Tj < 150C) tvsck —— (2)
2. 0.5tbus added due to internal synchronization delay
ns
9b Data Valid after SCK Edge (150C <Tj < 175C)(1) tvsck —— (2
)ns
10a Data Valid after SS fall (-40C < Tj < 150C) tvss —— (2
)ns
10b Data Valid after SS fall (150C < Tj < 175C)(1) tvss —— (2
)ns
11 Data Hold Time (Outputs) tho 22 ns
12 Rise and Fall Time Inputs trfi —— 8ns
13 Rise and Fall Time Outputs trfo —— 8ns
SCK
(INPUT)
SCK
(INPUT)
MOSI
(INPUT)
MISO
(OUTPUT)
1
5 6
MSB IN
BIT 6 . . . 1
LSB IN
MSB OUT SLAVE LSB OUT
BIT 6 . . . 1
4
4
9
12 13
11
(CPOL 0)
(CPOL 1)
SS
(INPUT)
212 13 3
NOTE: Not defined!
SLAVE
7
8
see
note
23 0.5 tbus
+
25 0.5 tbus
+
23 0.5 tbus
+
25 0.5 tbus
+
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 927
Appendix J
MSCAN Electrical Specifications
J.1 MSCAN Wake-up Pulse Timing
Table J-1. MSCAN Wake-up Pulse Characteristics (Junction Temperature From –40C To +175C)
Conditions are 4.5 V < VDDX< 5.5 V, unless otherwise noted.
Num C Rating Symbol Min Typ Max Unit
1MSCAN wake-up dominant pulse filtered tWUP ——1.5s
2MSCAN wake-up dominant pulse pass tWUP 5—s
Appendix J MSCAN Electrical Specifications
MC9S12ZVM Family Reference Manual Rev. 2.2
928 Freescale Semiconductor
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 929
Appendix K Package Information
Freescale’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C.
For Peak Package Reflow T emperature and Moisture Sensitivity Levels (MSL), Go to www .freescale.com,
search by part number and review parametrics.
K.1 48LQFP-EP Mechanical Information
Figure K-1. 48LQFP-EP Mechanical Information
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
930 Freescale Semiconductor
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 931
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
932 Freescale Semiconductor
K.2 64LQFP-EP Mechanical Information
Figure K-2. 64LQFP-EP Mechanical Information
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 933
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
934 Freescale Semiconductor
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 935
K.3 80LQFP-EP Mechanical Information
Figure K-3. 80LQFP-EP
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
936 Freescale Semiconductor
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 937
Appendix K Package Information
MC9S12ZVM Family Reference Manual Rev. 2.2
938 Freescale Semiconductor
Appendix L Ordering Information
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 939
Appendix L
Ordering Information
Customers can choose either the mask-specific partnumber or the generic, mask-independent partnumber.
Ordering a mask-specific partnumber enables the customer to specify which particular maskset they
receive whereas ordering the generic partnumber means that the currently preferred maskset (which may
change over time) is shipped. In either case, the marking on the device always shows the generic, mask-
independent partnumber and the mask set number. The below figure illustrates the structure of a typical
mask-specific ordering number.
NOTES
Not every combination is offered. Table 1.2.1 lists available derivatives.
The mask identifier suffix and the Tape & Reel suffix are always both
omitted from the partnumber which is actually marked on the device.
S 9 12Z VM L 12 F0 M KH R
Package Option:
Temperature Option:
Device Title
Controller Family
V = -40°C to 105°C
KH = 64LQFP-EP
Status / Partnumber type:
S or SC = Maskset specific partnumber
MC = Generic / mask-independent partnumber
P or PC = prototype status (pre qualification)
Main Memory Type:
9 = Flash
Maskset identifier Suffix:
First digit usually references wafer fab
Second digit usually differentiates mask rev
(This suffix is omitted in generic partnumbers)
Tape & Reel:
R = Tape & Reel
No R = No Tape & Reel
M = -40°C to 125°C
W = -40°C to 150°C
Memory Size
12 = 128K Flash
64 = 64K Flash
31, 32 = 32K Flash
Bondout Option:
L = LINPHY
C = CAN VREG
No letter = HV PHY
16 = 16K Flash
KF = 48LQFP-EP
25 = 256K Flash
Appendix L Ordering Information
MC9S12ZVM Family Reference Manual Rev. 2.2
940 Freescale Semiconductor
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 941
Appendix M
Detailed Register Address Map
Registers listed are a superset of all registers in the S12ZVM-Family.
The device overview section specifies module (version) assignment to individual devices.
M.1 0x0000–0x0003 Part ID
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0x0000 PARTID0 R00000000
W
0x0001 PARTID1 R0001Derivative Dependent (see Table 1-6)
W
0x0002 PARTID2 R00000000
W
0x0003 PARTID3 R Revision Dependent
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
942 Freescale Semiconductor
M.3 0x0070-0x00FF S12ZMMC
M.2 0x0010–0x001F S12ZINT
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0010
IVBR
RIVB_ADDR[15:8]
W
0x0011 RIVB_ADDR[7:1] 0
W
0x0012-
0x0016
ReservedR00000000
W
0x0017 INT_CFADDR R0 INT_CFADDR[6:3] 000
W
0x0018 INT_CFDATA0 R00000 PRIOLVL[2:0]
W
0x0019 INT_CFDATA1 R00000 PRIOLVL[2:0]
W
0x001A INT_CFDATA2 R00000 PRIOLVL[2:0]
W
0x001B INT_CFDATA3 R00000 PRIOLVL[2:0]
W
0x001C INT_CFDATA4 R00000 PRIOLVL[2:0]
W
0x001D INT_CFDATA5 R00000 PRIOLVL[2:0]
W
0x001E INT_CFDATA6 R00000 PRIOLVL[2:0]
W
0x001F INT_CFDATA7 R00000 PRIOLVL[2:0]
W
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0070 MODE R MODC 0000000
W
0x0071-
0x007F
Reserved R 0 0 0 0 0 0 0 0
W
0x0080 MMCECH R ITR[3:0] TGT[3:0]
W
0x0081 MMCECL R ACC[3:0] ERR[3:0]
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 943
0x0082 MMCCCRH R CPUU 0 0 0 0 0 0 0
W
0x0083 MMCCCRL R 0 CPUX 0 CPUI 0 0 0 0
W
0x0084 Reserved R 0 0 0 0 0 0 0 0
W
0x0085 MMCPCH R CPUPC[23:16]
W
0x0086 MMCPCM R CPUPC[15:8]
W
0x0087 MMCPCL R CPUPC[7:0]
W
0x0088-
0x00FF
Reserved R 0 0 0 0 0 0 0 0
W
M.4 0x0100-0x017F S12ZDBG
AddressNameBit 7654321Bit 0
0x0100 DBGC1 RARM 0reserved BDMBP BRKCPU reserved EEVE1 EEVE0(2)
WTRIG
0x0101 DBGC2 R0 0 0 0 CDCM(2) ABCM
W
0x0102 DBGTCRH
(2)
Rreserved TSOURCE TRANGE TRCMOD TALIGN
W
0x0103 DBGTCRL
(2)
R0 0 0 PREND(1) DSTAMP PDOE PROFILE STAMP
W
0x0104 DBGTBH
(2)
R Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
0x0105 DBGTBL
(2)
RBit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
W
0x0106 DBGCNT
(2)
R0 CNT
W
0x0107 DBGSCR1 RC3SC1 C3SC0 C2SC1(2) C2SC0(2) C1SC1 C1SC0 C0SC1 C0SC0
W
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
944 Freescale Semiconductor
0x0108 DBGSCR2 RC3SC1 C3SC0 C2SC1(2) C2SC0(2) C1SC1 C1SC0 C0SC1 C0SC0
W
0x0109 DBGSCR3 RC3SC1 C3SC0 C2SC1(2) C2SC0(2) C1SC1 C1SC0 C0SC1 C0SC0
W
0x010A DBGEFR RPTBOVF
(2) TRIGF 0 EEVF ME3 ME2(2) ME1 ME0
W
0x010B DBGSR RTBF
(2) 0 0 PTACT(2) 0 SSF2 SSF1 SSF0
W
0x010C-
0x010F Reserved R00000000
W
0x0110 DBGACTL R0 NDB INST 0RW RWE reserved COMPE
W
0x0111-
0x0114 Reserved R00000000
W
0x0115 DBGAAH RDBGAA[23:16]
W
0x0116 DBGAAM RDBGAA[15:8]
W
0x0117 DBGAAL RDBGAA[7:0]
W
0x0118 DBGAD0 RBit 31 30 29 28 27 26 25 Bit 24
W
0x0119 DBGAD1 RBit 23 22 21 20 19 18 17 Bit 16
W
0x011A DBGAD2 RBit 15 14 13 12 11 10 9 Bit 8
W
0x011B DBGAD3 RBit 7654321Bit 0
W
0x011C DBGADM0 RBit 31 30 29 28 27 26 25 Bit 24
W
0x011D DBGADM1 RBit 23 22 21 20 19 18 17 Bit 16
W
0x011E DBGADM2 RBit 15 14 13 12 11 10 9 Bit 8
W
0x011F DBGADM3 RBit 7654321Bit 0
W
0x0120 DBGBCTL R0 0 INST 0RW RWE reserved COMPE
W
M.4 0x0100-0x017F S12ZDBG
AddressNameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 945
0x0121-
0x0124 Reserved R00000000
W
0x0125 DBGBAH RDBGBA[23:16]
W
0x0126 DBGBAM RDBGBA[15:8]
W
0x0127 DBGBAL RDBGBA[7:0]
W
0x0128-
0x012F Reserved R00000000
W
0x0130 DBGCCTL
(2)
R0 NDB INST 0RW RWE reserved COMPE
W
0x0131-
0x0134 Reserved R00000000
W
0x0135 DBGCAH
(2)
RDBGCA[23:16]
W
0x0136 DBGCAM
(2)
RDBGCA[15:8]
W
0x0137 DBGCAL
(2)
RDBGCA[7:0]
W
0x0138 DBGCD0
(2)
RBit 31 30 29 28 27 26 25 Bit 24
W
0x0139 DBGCD1
(2)
RBit 23 22 21 20 19 18 17 Bit 16
W
0x013A DBGCD2
(2)
RBit 15 14 13 12 11 10 9 Bit 8
W
0x013B DBGCD3
(2)
RBit 7654321Bit 0
W
0x013C DBGCDM0
(2)
RBit 31 30 29 28 27 26 25 Bit 24
W
0x013D DBGCDM1
(2)
RBit 23 22 21 20 19 18 17 Bit 16
W
0x013E DBGCDM2
(2)
RBit 15 14 13 12 11 10 9 Bit 8
W
0x013F DBGCDM3
(2)
RBit 7654321Bit 0
W
0x0140 DBGDCTL R0 0 INST 0RW RWE reserved COMPE
W
M.4 0x0100-0x017F S12ZDBG
AddressNameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
946 Freescale Semiconductor
0x0141-
0x0144 Reserved R00000000
W
0x0145 DBGDAH RDBGDA[23:16]
W
0x0146 DBGDAM RDBGDA[15:8]
W
0x0147 DBGDAL RDBGDA[7:0]
W
0x0148-
0x017F Reserved R00000000
W
1. Only included on S12ZVM256
2. Not included on S12ZVM32 or S12ZVM16 devices
M.4 0x0100-0x017F S12ZDBG
AddressNameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 947
M.5 0x0200-0x02FF PIM (See footnotes for part specific information)
Global
Address
Register
Name Bit 7654321Bit 0
0x0200 MODRR0
R0 0
SPI0SSRR SPI0RR SCI1RR S0L0RR2-0(1)
W
0x0201 MODRR1
R
M0C0RR2-0(2) PWMPRR1-0(3) PWM54RR PWM32RR PWM10RR
W
0x0202 MODRR2
R
T0C2RR1-0(4) T0C1RR(4) RESERVED T0IC3RR1-0 T0IC1RR T0IC1RR0(4)
W
0x0203–
0x0207 Reserved
R00000000
W
0x0208 ECLKCTL
R
NECLK
0000000
W
0x0209 IRQCR
R
IRQE IRQEN
000000
W
0x020A PIMMISC
R000000
OCPE1
0
W
0x020B–
0x020C Reserved
R00000000
W
0x020D Reserved
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x020E Reserved
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x020F Reserved
R
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0210–
0x025F Reserved
R00000000
W
0x0260 PTE
R000000
PTE1 PTE0
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
948 Freescale Semiconductor
0x0261 Reserved
R00000000
W
0x0262 PTIE
R000000PTIE1PTIE0
W
0x0263 Reserved
R00000000
W
0x0264 DDRE
R000000
DDRE1 DDRE0
W
0x0265 Reserved
R00000000
W
0x0266 PERE
R000000
PERE1 PERE0
W
0x0267 Reserved
R00000000
W
0x0268 PPSE
R000000
PPSE1 PPSE0
W
0x0269–
0x027F Reserved
R00000000
W
0x0280 PTADH
R
PTADH72PTADH62PTADH52PTADH42PTADH32PTADH22PTADH12PTADH0
W
0x0281 PTADL
R
PTADL7 PTADL6 PTADL5 PTADL4 PTADL3 PTADL2 PTADL1 PTADL0
W
0x0282 PTIADH
R PTIADH72PTIADH62PTIADH52PTIADH42PTIADH32PTIADH22PTIADH1(2) PTIADH0
W
0x0283 PTIADL
R PTIADL7 PTIADL6 PTIADL5 PTIADL4 PTIADL3 PTIADL2 PTIADL1 PTIADL0
W
Global
Address
Register
Name Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 949
0x0284 DDRADH
R
DDRADH72DDRADH62DDRADH52DDRADH42DDRADH32DDRADH22DDRADL12DDRADH0
W
0x0285 DDRADL
R
DDRADL7 DDRADL6 DDRADL5 DDRADL4 DDRADL3 DDRADL2 DDRADL1 DDRADL0
W
0x0286 PERADH
R
PERADH72PERADH62PERADH52PERADH42PERADH32PERADH22PERADH12PERADH0
W
0x0287 PERADL
R
PERADL7 PERADL6 PERADL5 PERADL4 PERADL3 PERADL2 PERADL1 PERADL0
W
0x0288 PPSADH
R
PPSADH72PPSADH62PPSADH52PPSADH42PPSADH32PPSADH22PPSADH12PPSADH0
W
0x0289 PPSADL
R
PPSADL7 PPSADL6 PPSADL5 PPSADL4 PPSADL3 PPSADL2 PPSADL1 PPSADL0
W
0x028A–
0x028B Reserved
R00000000
W
0x028C PIEADH
R
PIEADH72PIEADH62PIEADH52PIEADH42PIEADH32PIEADH22PIEADH12PIEADH0
W
0x028D PIEADL
R
PIEADL7 PIEADL6 PIEADL5 PIEADL4 PIEADL3 PIEADL2 PIEADL1 PIEADL0
W
0x028E PIFADH
R
PIFADH72PIFADH62PIFADH52PIFADH42PIFADH32PIFADH22PIFADH12PIFADH0
W
0x028F PIFADL
R
PIFADL7 PIFADL6 PIFADL5 PIFADL4 PIFADL3 PIFADL2 PIFADL1 PIFADL0
W
0x0290–
0x0297 Reserved
R00000000
W
0x0298 DIENADH
RDIENADH72DIENADH62DIENADH52DIENADH42DIENADH32DIENADH22DIENADH12DIENADH0
W
0x0299 DIENADL
R
DIENADL7 DIENADL6 DIENADL5 DIENADL4 DIENADL3 DIENADL2 DIENADL1 DIENADL0
W
Global
Address
Register
Name Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
950 Freescale Semiconductor
0x029A–
0x02BF Reserved
R00000000
W
0x02C0 PTT
R0000
PTT3 PTT2 PTT1 PTT0
W
0x02C1 PTIT
R0000PTIT3PTIT2PTIT1PTIT0
W
0x02C2 DDRT
R0000
DDRT3 DDRT2 DDRT1 DDRT0
W
0x02C3 PERT
R0000
PERT3 PERT2 PERT1 PERT0
W
0x02C4 PPST
R0000
PPST3 PPST2 PPST1 PPST0
W
0x02C5–
0x02CF Reserved
R00000000
W
0x02D0 PTS
R0 0
PTS5(5) PTS4(5) PTS3 PTS2 PTS1 PTS0
W
0x02D1 PTIS
R0 0 PTIS5
(5) PTIS4(5) PTIS3 PTIS2 PTIS1 PTIS0
W
0x02D2 DDRS
R0 0
DDRS5(5) DDRS4(5) DDRS3 DDRS2 DDRS1 DDRS0
W
0x02D3 PERS
R0 0
PERS5(5) PERS4(5) PERS3 PERS2 PERS1 PERS0
W
0x02D4 PPSS
R0 0
PPSS5(5) PPSS4(5) PPSS3 PPSS2 PPSS1 PPSS0
W
0x02D5 Reserved
R00000000
W
Global
Address
Register
Name Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 951
0x02D6 PIES
R0 0
PIES5(5) PIES4(5) PIES3 PIES2 PIES1 PIES0
W
0x02D7 PIFS
R0 0
PIFS5(5) PIFS4(5) PIFS3 PIFS2 PIFS1 PIFS0
W
0x02D8–
0x02DE Reserved
R00000000
W
0x02DF WOMS
R0 0
WOMS5(5) WOMS4(5) WOMS3 WOMS2 WOMS1 WOMS0
W
0x02E0–
0x02EF Reserved
R00000000
W
0x02F0 PTP
R00000
PTP2(5) PTP1 PTP0
W
0x02F1 PTIP
R00000PTIP2
(5) PTIP1 PTIP0
W
0x02F2 DDRP
R00000
DDRP2(5) DDRP1 DDRP0
W
0x02F3 PERP
R00000
PERP2(5) PERP1 PERP0
W
0x02F4 PPSP
R00000
PPSP2(5) PPSP1 PPSP0
W
0x02F5 Reserved
R00000000
W
0x02F6 PIEP
R
OCIE1
0000
PIEP2(5) PIEP1 PIEP0
W
0x02F7 PIFP
R
OCIF1
0000
PIFP2(5) PIFP1 PIFP0
W
Global
Address
Register
Name Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
952 Freescale Semiconductor
0x02F8–
0x02FC Reserved
R00000000
W
0x02FD RDRP
R0000000
RDRP0
W
0x02FE–
0x0330 Reserved
R00000000
W
0x0331 PTIL2R0000000PTIL0
W
0x0332 Reserved
R00000000
W
0x0333 PTPSL2R0000000
PTPSL0
W
0x0334 PPSL2R0000000
PPSL0
W
0x0335 Reserved
R00000000
W
0x0336 PIEL2R0000000
PIEL0
W
0x0337 PIFL2R0000000
PIFL0
W
Global
Address
Register
Name Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 953
0x0338–
0x0339 Reserved
R00000000
W
0x033A PTABYPL2R0000000
PTABYPL0
W
0x033B PTADIRL2R0000000
PTADIRL0
W
0x033C DIENL2R0000000
DIENL0
W
0x033D PTAENL2R0000000
PTAENL0
W
0x033E PIRL2R0000000
PIRL0
W
0x033F PTTEL2R0000000
PTTEL0
W
1. Only available for ZVML128, ZVML64, ZVML32, and ZVML31
2. Only available for ZVMC256
3. PWMPRR[1] only writable for ZVMC256
4. Only available for ZVMC256, ZVML31, ZVM32, ZVM16
5. Not available for ZVMC256
M.6 0x0380-0x039F FTMRZ128K512
AddressName 76543210
0x0380 FCLKDIV RFDIVLD FDIVLCK FDIV5 FDIV4 FDIV3 FDIV2 FDIV1 FDIV0
W
0x0381 FSEC R KEYEN1 KEYEN0 RNV5 RNV4 RNV3 RNV2 SEC1 SEC0
W
0x0382 FCCOBIX R00000
CCOBIX2 CCOBIX1 CCOBIX0
W
0x0383 FPSTAT RFPOVRD000000
WSTAT
ACK
W
0x0384 FCNFG RCCIE 0 ERSAREQ IGNSF WSTAT[1:0] FDFD FSFD
W
Global
Address
Register
Name Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
954 Freescale Semiconductor
0x0385 FERCNFG R0000000
SFDIE
W
0x0386 FSTAT RCCIF 0ACCERR FPVIOL MGBUSY RSVD MGSTAT1 MGSTAT0
W
0x0387 FERSTAT R000000
DFDF SFDIF
W
0x0388 FPROT RFPOPEN RNV6 FPHDIS FPHS1 FPHS0 FPLDIS FPLS1 FPLS0
W
0x0389 DFPROT RDPOPEN 000
DPS3 DPS2 DPS1 DPS0
W
0x038A FOPT R NV7 NV6 NV5 NV4 NV3 NV2 NV1 NV0
W
0x038B FRSV1 R00000000
W
0x038C FCCOB0HI RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x038D FCCOB0LO RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x038E FCCOB1HI RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x038F FCCOB1LO RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x0390 FCCOB2HI RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x0391 FCCOB2LO RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x0392 FCCOB3HI RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x0393 FCCOB3LO RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
0x0394 FCCOB4HI RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x0395 FCCOB4LO RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
M.6 0x0380-0x039F FTMRZ128K512 (continued)
AddressName 76543210
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 955
0x0396 FCCOB5HI RCCOB15 CCOB14 CCOB13 CCOB12 CCOB11 CCOB10 CCOB9 CCOB8
W
0x0397 FCCOB5LO RCCOB7 CCOB6 CCOB5 CCOB4 CCOB3 CCOB2 CCOB1 CCOB0
W
M.7 0x03C0-0x03CF SRAM_ECC_32D7P
Address Name Bit 7654321Bit 0
0x03C0 ECCSTAT R0000000RDY
W
0x03C1 ECCIE R0000000
SBEEIE
W
0x03C2 ECCIF R0000000
SBEEIF
W
0x03C3 -
0x03C6 Reserved R00000000
W
0x03C7 ECCDPTRH RDPTR[23:16]
W
0x03C8 ECCDPTRM RDPTR[15:8]
W
0x03C9 ECCDPTRL RDPTR[7:1] 0
W
0x03CA -
0x03CB Reserved R00000000
W
0x03CC ECCDDH RDDATA[15:8]
W
0x03CD ECCDDL RDDATA[7:0]
W
0x03CE ECCDE R0 0 DECC[5:0]
W
0x03CF ECCDCMD RECCDRR 00000
ECCDW ECCDR
W
M.6 0x0380-0x039F FTMRZ128K512 (continued)
AddressName 76543210
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
956 Freescale Semiconductor
M.8 0x0400-0x042F TIM1
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0400 TIM1TIOS RIOS1 IOS0
W
0x0401 TIM1CFORC R00
WFOC1 FOC0
0x0402 Reserved R
W
0x0403 Reserved R
W
0x0404 TIM1TCNTH RTCNT15 TCNT14 TCNT13 TCNT12 TCNT11 TCNT10 TCNT9 TCNT8
W
0x0405 TIM1TCNTL RTCNT7 TCNT6 TCNT5 TCNT4 TCNT3 TCNT2 TCNT1 TCNT0
W
0x0406 TIM1TSCR1 RTEN TSWAI TSFRZ TFFCA PRNT 000
W
0x0407 TIM1TTOV RTOV1 TOV0
W
0x0408 TIM1TCTL1 R
W
0x0409 TIM1TCTL2 ROM1 OL1 OM0 OL0
W
0x040A TIM1TCTL3 R
W
0x040B TIM1TCTL4 REDG1B EDG1A EDG0B EDG0A
W
0x040C TIM1TIE RC1I C0I
W
0x040D TIM1TSCR2 RTOI 000 PR2 PR1 PR0
W
0x040E TIM1TFLG1 RC1F C0F
W
0x040F TIM1TFLG2 RTOF 0000000
W
0x0410 TIM1TC 0H RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
0x0411 TIM1TC0L RBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 957
0x0412 TIM1TC 1H RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
0x0413 TIM1TC1L RBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
0x0414–
0x042B Reserved R
W
0x042C TIM1OCPD ROCPD1 OCPD0
W
0x042D Reserved R
W
0x042E TIM1PTPSR RPTPS7 PTPS6 PTPS5 PTPS4 PTPS3 PTPS2 PTPS1 PTPS0
W
0x042F Reserved R
W
M.9 0x0480-0x04AF PWM0
Address NameBit 7654321Bit 0
0x0480 PWME RPWME7 PWME6 PWME5 PWME4 PWME3 PWME2 PWME1 PWME0
W
0x0481 PWMPOL RPPOL7 PPOL6 PPOL5 PPOL4 PPOL3 PPOL2 PPOL1 PPOL0
W
0x0482 PWMCLK RPCLK7 PCLKL6 PCLK5 PCLK4 PCLK3 PCLK2 PCLK1 PCLK0
W
0x0483 PWMPRCLK R0 PCKB2 PCKB1 PCKB0 0PCKA2 PCKA1 PCKA0
W
0x0484 PWMCAE RCAE7 CAE6 CAE5 CAE4 CAE3 CAE2 CAE1 CAE0
W
0x0485 PWMCTL RCON67 CON45 CON23 CON01 PSWAI PFRZ 00
W
0x0486 PWMCLKAB RPCLKAB7 PCLKAB6 PCLKAB5 PCLKAB4 PCLKAB3 PCLKAB2 PCLKAB1 PCLKAB0
W
0x0487 RESERVED R00000000
W
0x0488 PWMSCLA RBit 7 6 5 4 3 2 1 Bit 0
W
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
958 Freescale Semiconductor
0x0489 PWMSCLB RBit 7 6 5 4 3 2 1 Bit 0
W
0x048A -
0x048B RESERVED R00000000
W
0x048C PWMCNT0 RBit 7 6 5 4 3 2 1 Bit 0
W00000000
0x048D PWMCNT1 RBit 7 6 5 4 3 2 1 Bit 0
W00000000
0x048E PWMCNT2 RBit 7 6 5 4 3 2 1 Bit 0
W00000000
0x048F PWMCNT3 RBit 7 6 5 4 3 2 1 Bit 0
W00000000
0x0490 PWMCNT4 RBit 7 6 5 4 3 2 1 Bit 0
W00000000
0x0491 PWMCNT5 RBit 7 6 5 4 3 2 1 Bit 0
W00000000
0x0492 PWMCNT6 RBit 7 6 5 4 3 2 1 Bit 0
W00000000
0x0493 PWMCNT7 RBit 7 6 5 4 3 2 1 Bit 0
W00000000
0x0494 PWMPER0 RBit 7 6 5 4 3 2 1 Bit 0
W
0x0495 PWMPER1 RBit 7 6 5 4 3 2 1 Bit 0
W
0x0496 PWMPER2 RBit 7 6 5 4 3 2 1 Bit 0
W
0x0497 PWMPER3 RBit 7 6 5 4 3 2 1 Bit 0
W
0x0498 PWMPER4 RBit 7 6 5 4 3 2 1 Bit 0
W
0x0499 PWMPER5 RBit 7 6 5 4 3 2 1 Bit 0
W
0x049A PWMPER6 RBit 7 6 5 4 3 2 1 Bit 0
W
M.9 0x0480-0x04AF PWM0
Address NameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 959
0x049B PWMPER7 RBit 7 6 5 4 3 2 1 Bit 0
W
0x049C PWMDTY0 RBit 7 6 5 4 3 2 1 Bit 0
W
0x049D PWMDTY1 RBit 7 6 5 4 3 2 1 Bit 0
W
0x049E PWMDTY2 RBit 7 6 5 4 3 2 1 Bit 0
W
0x049F PWMDTY32 RBit 7 6 5 4 3 2 1 Bit 0
W
0x04A0 PWMDTY42 RBit 7 6 5 4 3 2 1 Bit 0
W
0x04A1 PWMDTY52 RBit 7 6 5 4 3 2 1 Bit 0
W
0x04A2 PWMDTY62 RBit 7 6 5 4 3 2 1 Bit 0
W
0x04A3 PWMDTY72 RBit 7 6 5 4 3 2 1 Bit 0
W
0x04A4 -
0x04AF RESERVED R00000000
W
M.10 0x0500-x053F PMF15B6C
Address NameBit 7654321Bit 0
0x0500 PMFCFG0 RWP MTG EDGEC EDGEB EDGEA INDEPC INDEPB INDEPA
W
0x0501 PMFCFG1 R0 ENCE BOTNEGC TOPNEGC BOTNEGB TOPNEGB BOTNEGA TOPNEGA
W
0x0502 PMFCFG2 RREV1 REV0 MSK5 MSK4 MSK3 MSK2 MSK1 MSK0
W
0x0503 PMFCFG3 RPMFWAI PMFFRZ 0VLMODE PINVC PINVB PINVA
W
0x0504 PMFFEN R0 FEN5 0FEN4 FEN3 FEN2 FEN1 FEN0
W
0x0505 PMFFMOD R0 FMOD5 0FMOD4FMOD3FMOD2FMOD1FMOD0
W
M.9 0x0480-0x04AF PWM0
Address NameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
960 Freescale Semiconductor
0x0506 PMFFIE R0 FIE5 0FIE4 FIE3 FIE2 FIE1 FIE0
W
0x0507 PMFFIF R0 FIF5 0FIF4 FIF3 FIF2 FIF1 FIF0
W
0x0508 PMFQSMP0 R0 0 0 0 QSMP5 QSMP4
W
0x0509 PMFQSMP1 RQSMP3 QSMP2 QSMP1 QSMP0
W
0x050A-
0x050B Reserved R00000000
W
0x050C PMFOUTC R0 0 OUTCTL5 OUTCTL4 OUTCTL3 OUTCTL2 OUTCTL1 OUTCTL0
W
0x050D PMFOUTB R0 0 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0
W
0x050E PMFDTMS R 0 0 DT5 DT4 DT3 DT2 DT1 DT0
W
0x050F PMFCCTL R0 0 ISENS 0IPOLC IPOLB IPOLA
W
0x0510 PMFVAL0 RPMFVAL0
W
0x0511 PMFVAL0 RPMFVAL0
W
0x0512 PMFVAL1 RPMFVAL1
W
0x0513 PMFVAL1 RPMFVAL1
W
0x0514 PMFVAL2 RPMFVAL2
W
0x0515 PMFVAL2 RPMFVAL2
W
0x0516 PMFVAL3 RPMFVAL3
W
0x0517 PMFVAL3 RPMFVAL3
W
M.10 0x0500-x053F PMF15B6C
Address NameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 961
0x0518 PMFVAL4 RPMFVAL4
W
0x0519 PMFVAL4 RPMFVAL4
W
0x051A PMFVAL5 RPMFVAL5
W
0x051B PMFVAL5 RPMFVAL5
W
0x051C PMFROIE R00000
PMFROIE
C
PMFROIE
B
PMFROIE
A
W
0x051D PMFROIF R00000
PMFROIF
C
PMFROIF
B
PMFROIF
A
W
0x051E PMFICCTL R0 0 PECC PECB PECA ICCC ICCB ICCA
W
0x051F PMFCINV R0 0 CINV5 CINV4 CINV3 CINV2 CINV1 CINV0
W
0x0520 PMFENCA RPWMENA GLDOKA 000
RSTRTA LDOKA PWMRIEA
W
0x0521 PMFFQCA RLDFQA HALFA PRSCA PWMRFA
W
0x0522 PMFCNTA R 0 PMFCNTA
W
0x0523 PMFCNTA RPMFCNTA
W
0x0524 PMFMODA R0 PMFMODA
W
0x0525 PMFMODA RPMFMODA
W
0x0526 PMFDTMA R0 0 0 0 PMFDTMA
W
0x0527 PMFDTMA RPMFDTMA
W
0x0528 PMFENCB RPWMENB GLDOKB 000
RSTRTB LDOKB PWMRIEB
W
M.10 0x0500-x053F PMF15B6C
Address NameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
962 Freescale Semiconductor
0x0529 PMFFQCB RLDFQB HALFB PRSCB PWMRFB
W
0x052A PMFCNTB R0 PMFCNTB
W
0x052B PMFCNTB R PMFCNTB
W
0x052C PMFMODB R0 PMFMODB
W
0x052D PMFMODB RPMFMODB
W
0x052E PMFDTMB R0 0 0 0 PMFDTMB
W
0x052F PMFDTMB RPMFDTMB
W
0x0530 PMFENCC RPWMENC GLDOKC 000
RSTRTC LDOKC PWMRIEC
W
0x0531 PMFFQCC RLDFQC HALFC PRSCC PWMRFC
W
0x0532 PMFCNTC R0 PMFCNTC
W
0x0533 PMFCNTC R PMFCNTC
W
0x0534 PMFMODC R0 PMFMODC
W
0x0535 PMFMODC RPMFMODC
W
0x0536 PMFDTMC R0 0 0 0 PMFDTMC
W
0x0537 PMFDTMC RPMFDTMC
W
0x0538 PMFDMP0 RDMP05 DMP04 DMP03 DMP02 DMP01 DMP00
W
0x0539 PMFDMP1 RDMP15 DMP14 DMP13 DMP12 DMP11 DMP10
W
M.10 0x0500-x053F PMF15B6C
Address NameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 963
0x053A PMFDMP2 RDMP25 DMP24 DMP23 DMP22 DMP21 DMP20
W
0x053B PMFDMP3 RDMP35 DMP34 DMP33 DMP32 DMP31 DMP30
W
0x053C PMFDMP4 RDMP45 DMP44 DMP43 DMP42 DMP41 DMP40
W
0x053D PMFDMP5 RDMP55 DMP54 DMP53 DMP52 DMP51 DMP50
W
0x053E PMFOUTF R0 0 OUTF5 OUTF4 OUTF3 OUTF2 OUTF1 OUTF0
W
0x053F Reserved R00000000
W
M.11 0x0580-0x059F PTU
Address Name Bit 7654321Bit 0
0x0580 PTUE R0 PTUFRZ 0000
TG1EN TG0EN
W
0x0581 PTUC R0000000
PTULDOK
W
0x0582 PTUIEH R0000000
PTUROIE
W
0x0583 PTUIEL RTG1AEIE TG1REIE TG1TEIE TG1DIE TG0AEIE TG0REIE TG0TEIE TG0DIE
W
0x0584 PTUIFH R000000
PTUDEEF PTUROIF
W
0x0585 PTUIFL RTG1AEIF TG1REIF TG1TEIF TG1DIF TG0AEIF TG0REIF TG0TEIF TG0DIF
W
0x0586 TG0LIST R0000000
TG0LIST
W
0x0587 TG0TNUM R 0 0 0 TG0TNUM[4:0]
W
0x0588 TG0TVH R TG0TV[15:8]
W
M.10 0x0500-x053F PMF15B6C
Address NameBit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
964 Freescale Semiconductor
0x0589 TG0TVL R TG0TV[7:0]
W
0x058A TG1LIST R0000000
TG1LIST
W
0x058B TG1TNUM R 0 0 0 TG1TNUM4:0]
W
0x058C TG1TVH R TG1TV[15:8]
W
0x058D TG1TVL R TG1TV[7:0]
W
0x058E PTUCNTH R PTUCNT[15:8]
W
0x058F PTUCNTL R PTUCNT[7:0]
W
0x0590 Reserved R00000000
W
0x0591 PTUPTRH RPTUPTR[23:16]
W
0x0592 PTUPTRM RPTUPTR[15:8]
W
0x0593 PTUPTRL RPTUPTR[7:1] 0
W
0x0594 TG0L0IDX R00000000
W
0x0595 TG0L1IDX R0 TG0L1IDX[6:0]
W
0x0596 TG1L0IDX R0 TG1L0IDX[6:0]
W
0x0597 TG1L1IDX R0 TG1L1IDX[6:0]
W
0x0598 -
0x059E Reserved R00000000
W
0x059F PTUDEBUG R0 PTUREPE PTUT1PE PTUT0PE 0000
WPTUFRE TG1FTE TG0FTE
M.11 0x0580-0x059F PTU
Address Name Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 965
M.12 0x05C0-0x05FF TIM0
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x05C0 TIM0TIOS RIOS3 IOS2 IOS1 IOS0
W
0x05C1 TIM0CFORC R00000000
WFOC3 FOC2 FOC1 FOC0
0x05C2 Reserved R
W
0x05C3 Reserved R
W
0x05C4 TIM0TCNTH RTCNT15 TCNT14 TCNT13 TCNT12 TCNT11 TCNT10 TCNT9 TCNT8
W
0x05C5 TIM0TCNTL RTCNT7 TCNT6 TCNT5 TCNT4 TCNT3 TCNT2 TCNT1 TCNT0
W
0x05C6 TIM0TSCR1 RTEN TSWAI TSFRZ TFFCA PRNT 000
W
0x05C7 TIM0TTOV RTOV3 TOV2 TOV1 TOV0
W
0x05C8 TIM0TCTL1 R
W
0x05C9 TIM0TCTL2 ROM3 OL3 OM2 OL2 OM1 OL1 OM0 OL0
W
0x05CA TIM0TCTL3 R
W
0x05CB TIM0TCTL4 REDG3B EDG3A EDG2B EDG2A EDG1B EDG1A EDG0B EDG0A
W
0x05CC TIM0TIE RC3I C2I C1I C0I
W
0x05CD TIM0TSCR2 RTOI 000 PR2 PR1 PR0
W
0x05CE TIM0TFLG1 RC3F C2F C1F C0F
W
0x05CF TIM0TFLG2 RTOF 0000000
W
0x05D0 TIM0TC 0H RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
0x05D1 TIM0TC0L RBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
966 Freescale Semiconductor
0x05D2 TIM0TC 1H RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
0x05D3 TIM0TC1L RBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
0x05D4 TIM0TC 2H RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
0x05D5 TIM0TC2L RBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
0x05D6 TIM0TC3H RBit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
0x05D7 TIM0TC3L RBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
0x05D8–
0x05DF Reserved R
W
0x05E0 Reserved R
W
0x05E1 Reserved R
W
0x05E2 Reserved R
W
0x05E3 Reserved R
W
0x05E4–
0x05EB Reserved R
W
0x05EC TIM0OCPD ROCPD3 OCPD2 OCPD1 OCPD0
W
0x05ED Reserved R
W
0x05EE TIM0PTPSR RPTPS7 PTPS6 PTPS5 PTPS4 PTPS3 PTPS2 PTPS1 PTPS0
W
0x05EF Reserved R
W
M.12 0x05C0-0x05FF TIM0
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 967
M.13 0x0600-0x063F ADC0
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0600 ADC0CTL_0 RADC_EN ADC_SR FRZ_MOD SWAI ACC_CFG[1:0] STR_SEQ
A
MOD_CF
G
W
0x0601 ADC0CTL_1 RCSL_BMO
D
RVL_BMO
D
SMOD_A
CC
AUT_RST
A
0000
W
0x0602 ADC0STS RCSL_SEL RVL_SEL
DBECC_E
RR Reserved READY 000
W
0x0603 ADC0TIM R0 PRS[6:0]
W
0x0604 ADC0FMT RDJM 0000 SRES[2:0]
W
0x0605 ADC0FLWCTL RSEQA TRIG RSTA LDOK 0000
W
0x0606 ADC0EIE RIA_EIE CMD_EIE EOL_EIE Reserved TRIG_EIE RSTAR_EI
ELDOK_EIE 0
W
0x0607 ADC0IE RSEQAD_I
E
CONIF_OI
EReserved 00000
W
0x0608 ADC0EiF RIA_EIF CMD_EIF EOL_EIF Reserved TRIG_EIF RSTAR_EI
FLDOK_EIF 0
W
0x0609 ADC0IF RSEQAD_I
F
CONIF_OI
FReserved 00000
W
0x060A ADC0CONIE_0 RCON_IE[15:8]
W
0x060B ADC0CONIE_1 RCON_IE[7:1] EOL_IE
W
0x060C ADC0CONIF_0 RCON_IF[15:8]
W
0x060D ADC0CONIF_1 RCON_IF[7:1] EOL_IF
W
0x060E ADC0IMDRI_0 R CSL_IMD RVL_IMD 0 0 0 0 0 0
0x060F ADC0IMDRI_1 R0 0 RIDX_IMD
W
0x0610 ADC0EOLRI RCSL_EOLRVL_EOL000000
W
0x0611 Reserved R00000000
W
0x0612 Reserved R00000000
W
0x0613 Reserved R Reserved 0 0
W
0x0614 ADC0CMD_0 RCMD_SEL 00 INTFLG_SEL[3:0]
W
0x0615 ADC0CMD_1 RVRH_SEL VRL_SEL CH_SEL[5:0]
W
0x0616 ADC0CMD_2 RSMP[4:0] 00
Reserved
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
968 Freescale Semiconductor
0x0617 ADC0CMD_3 R Reserved Reserved Reserved
W
0x0618 Reserved R Reserved
W
0x0619 Reserved R Reserved
W
0x061A Reserved R Reserved
W
0x061B Reserved R Reserved
W
0x061C ADC0CIDX R 0 0 CMD_IDX[5:0]
W
0x061D ADC0CBP_0 RCMD_PTR[23:16]
W
0x061E ADC0CBP_1 RCMD_PTR[15:8]
W
0x061F ADC0CBP_2 RCMD_PTR[7:2] 00
W
0x0620 ADC0RIDX R 0 0 RES_IDX[5:0]
W
0x0621 ADC0RBP_0 R0000 RES_PTR[19:16]
W
0x0622 ADC0RBP_1 RRES_PTR[15:8]
W
0x0623 ADC0RBP_2 RRES_PTR[7:2] 00
W
0x0624 ADC0CROFF0 R 0 CMDRES_OFF0[6:0]
W
0x0625 ADC0CROFF1 R0 CMDRES_OFF1[6:0]
W
0x0626 Reserved R0000 Reserved
W
0x0627 Reserved RReserved
W
0x0628 Reserved RReserved 00
W
0x0629 Reserved R Reserved 0 Reserved
W
0x062A-
0x063F Reserved R00000000
W
M.13 0x0600-0x063F ADC0
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 969
M.14 0x0640-0x067F ADC1
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0640 ADC1CTL_0 RADC_EN ADC_SR FRZ_MOD SWAI ACC_CFG[1:0] STR_SEQ
A
MOD_CF
G
W
0x0641 ADC1CTL_1 RCSL_BMO
D
RVL_BMO
D
SMOD_A
CC
AUT_RST
A
0000
W
0x0642 ADC1STS RCSL_SEL RVL_SEL
DBECC_E
RR Reserved READY 0 0 0
W
0x0643 ADC1TIM R0 PRS[6:0]
W
0x0644 ADC1FMT RDJM 0000 SRES[2:0]
W
0x0645 ADC1FLWCTL RSEQA TRIG RSTA LDOK 0000
W
0x0646 ADC1EIE RIA_EIE CMD_EIE EOL_EIE Reserved TRIG_EIE RSTAR_EI
ELDOK_EIE 0
W
0x0647 ADC1IE RSEQAD_I
E
CONIF_OI
EReserved 00000
W
0x0648 ADC1EiF RIA_EIF CMD_EIF EOL_EIF Reserved TRIG_EIF RSTAR_EI
FLDOK_EIF 0
W
0x0649 ADC1IF RSEQAD_I
F
CONIF_OI
FReserved 00000
W
0x064A ADC1CONIE_0 RCON_IE[15:8]
W
0x064B ADC1CONIE_1 RCON_IE[7:1] EOL_IE
W
0x064C ADC1CONIF_0 RCON_IF[15:8]
W
0x064D ADC1CONIF_1 RCON_IF[7:1] EOL_IF
W
0x064E ADC1IMDRI_0 R CSL_IMD RVL_IMD 0 0 0 0 0 0
0x064F ADC1IMDRI_1 R0 0 RIDX_IMD
W
0x0650 ADC1EOLRI RCSL_EOLRVL_EOL000000
W
0x0651 Reserved R00000000
W
0x0652 Reserved R00000000
W
0x0653 Reserved R00000000
W
0x0654 ADC1CMD_0 RCMD_SEL 00 INTFLG_SEL[3:0]
W
0x0655 ADC1CMD_1 RVRH_SEL VRL_SEL CH_SEL[5:0]
W
0x0656 ADC1CMD_2 RSMP[4:0] 00
Reserved
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
970 Freescale Semiconductor
0x0657 ADC1CMD_3 R Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0658 Reserved R Reserved
W
0x0659 Reserved R Reserved
W
0x065A Reserved R Reserved
W
0x065B Reserved R Reserved
W
0x065C ADC1CIDX R 0 0 CMD_IDX[5:0]
W
0x065D ADC1CBP_0 RCMD_PTR[23:16]
W
0x065E ADC1CBP_1 RCMD_PTR[15:8]
W
0x065F ADC1CBP_2 RCMD_PTR[7:2] 00
W
0x0660 ADC1RIDX R 0 0 RES_IDX[5:0]
W
0x0661 ADC1RBP_0 R0000 RES_PTR[19:16]
W
0x0662 ADC1RBP_1 RRES_PTR[15:8]
W
0x0663 ADC1RBP_2 RRES_PTR[7:2] 00
W
0x0664 ADC1CROFF0 R 0 CMDRES_OFF0[6:0]
W
0x0665 ADC1CROFF1 R0 CMDRES_OFF1[6:0]
W
0x0666 Reserved R0000 Reserved
W
0x0667 Reserved RReserved
W
0x0668 Reserved RReserved 00
W
0x0669 Reserved R Reserved 0 Reserved
W
0x066A-
0x067F Reserved R00000000
W
M.14 0x0640-0x067F ADC1
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 971
M.15 0x06A0-0x06BF GDU
Address Name Bit 7654321Bit 0
0x06A0 GDUE RGWP 0EPRES(1) GCS1E GBOE GCS0E GCPE GFDE
W
0x06A1 GDUCTR RGHHDLVL GVLSLVL
(2) GBKTIM2[3:0] GBKTIM1[1:0]
W
0x06A2 GDUIE R000 GOCIE[1:0] GDSEIE GHHDIE GLVLSIE
W
0x06A3 GDUDSE R0 GDHSIF[2:0] 0GDLSIF[2:0]
W
0x06A4 GDUSTAT R GPHS[2:0] GOCS[1:0] GHHDS GLVLSS
W
0x06A5 GDUSRC R0 GSRCHS[2:0] 0GSRCLS[2:0]
W
0x06A6 GDUF RGSUF GHHDF GLVLSF GOCIF[1:0] 0GHHDIF GLVLSIF
W
0x06A7 GDUCLK1 R0 GBOCD[4:0] GBODC[1:0]
W
0x06A8 GDUBCL R0000 GBCL[3:0]
W
0x06A9 GDUPHMUX R000000 GPHMX[1:0]
W
0x06AA GDUCSO R0 GCSO1[2:0] 0GCSO0[2:0]
W
0x06AB GDUDSLVL(1) RGDSFHS
(2) GDSLHS[2:0] GDSFLS
(2) GDSLLS[2:0]
W
0x06AC GDUPHL R00000 GPHL[2:0]
W
0x06AD GDUCLK2 R0000 GCPCD[3:0]
W
0x06AE GDUOC0 RGOCA0 GOCE0 0GOCT0[4:0](3)
W
0x06AF GDUOC1 RGOCA1 GOCE1 0GOCT1[4:0](4)
W
0x06B0 GDUCTR1 RGSRMOD[1:0](5) 000000
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
972 Freescale Semiconductor
0x06B1-
0x06BF Reserved R
W
1. Only on GDU V4
2. Not available on GDUV4
3. On GDUV4 only GOCT0[3:0] available
4. On GDUV4 only GOCT1[3:0] available
5. Not available on GDUV4 and V5
M.16 0x06C0-0x06DF CPMU
AddressName Bit 7654321Bit 0
0x06C0 CPMU
RESERVED00
R00 000000
W
0x06C1 CPMU
RESERVED01
R00 000000
W
0x06C2 CPMU
RESERVED02
R00 000000
W
0x06C3 CPMURFLG R0 PORF LVRF 0COPRF 0OMRF PMRF
W
0x06C4 CPMU
SYNR
RVCOFRQ[1:0] SYNDIV[5:0]
W
0x06C5 CPMU
REFDIV
RREFFRQ[1:0] 00 REFDIV[3:0]
W
0x06C6 CPMU
POSTDIV
R000 POSTDIV[4:0]
W
0x06C7 CPMUIFLG RRTIF 00
LOCKIF LOCK 0 OSCIF UPOSC
W
0x06C8 CPMUINT RRTIE 00
LOCKIE 00
OSCIE 0
W
0x06C9 CPMUCLKS RPLLSEL PSTP CSAD COP
OSCSEL1 PRE PCE RTI
OSCSEL
COP
OSCSEL0
W
0x06CA CPMUPLL R0 0 FM1 FM0 0000
W
0x06CB CPMURTI RRTDEC RTR6 RTR5 RTR4 RTR3 RTR2 RTR1 RTR0
W
0x06CC CPMUCOP
R
WCOP RSBCK
000
CR2 CR1 CR0
WWRTMAS
K
0x06CD RESERVED
CPMUTEST0
R00000000
W
M.15 0x06A0-0x06BF GDU
Address Name Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 973
0x06CE RESERVED
CPMUTEST1
R00000000
W
0x06CF CPMU
ARMCOP
R00000000
W Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0x06D0 CPMU
HTCTL
R0 0 VSEL 0HTE HTDS HTIE HTIF
W
0x06D1 CPMU
LVCTL
R0 0 0 0 VDDSIE LVDS LVIE LVIF
W
0x06D2 CPMU
APICTL
RAPICLK 00
APIES APIEA APIFE APIE APIF
W
0x06D3 CPMUACLKT
R
RACLKTR5 ACLKTR4 ACLKTR3 ACLKTR2 ACLKTR1 ACLKTR0 00
W
0x06D4 CPMUAPIRH RAPIR15 APIR14 APIR13 APIR12 APIR11 APIR10 APIR9 APIR8
W
0x06D5 CPMUAPIRL RAPIR7 APIR6 APIR5 APIR4 APIR3 APIR2 APIR1 APIR0
W
0x06D6 RESERVED
CPMUTEST3
R 0 0 0 0 0 0 0 0
W
0x06D7 CPMUHTTR RHTOE 000
HTTR3 HTTR2 HTTR1 HTTR0
W
0x06D8 CPMU
IRCTRIMH
RTCTRIM[4:0] 0IRCTRIM[9:8]
W
0x06D9 CPMU
IRCTRIML
RIRCTRIM[7:0]
W
0x06DA CPMUOSC ROSCE Reserved Reserved Reserved
W
0x06DB CPMUPROT R0000000
PROT
W
0x06DC RESERVED
CPMUTEST2
R000 0 0 0 0 0
W
0x06DD CPMU
VREGCTL
RVRH2EN VRH1EN EXTS2ON EXTS1ON 0EXTCON EXTXON INTXON
W
0x06DE CPMUOSC2 R00 0000
OMRE OSCMOD
W
0x06DF CPMUVDDS R SCS2 SCS1 L VDS2 LVDS1 SCS2IF SCS1IF LVS2IF LVS1IF
W
M.16 0x06C0-0x06DF CPMU
AddressName Bit 7654321Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
974 Freescale Semiconductor
M.17 0x06F0-0x06F7 BATS
Address Name Bit 7654321Bit 0
0x06F0 BATE R0 BVHS BVLS[1:0] BSUAE BSUSE 00
W
0x06F1 BATSR R000000BVHCBVLC
W
0x06F2 BATIE R000000
BVHIE BVLIE
W
0x06F3 BATIF R000000
BVHIF BVLIF
W
0x06F4 -
0x06F5 Reserved R00000000
W
0x06F6 -
0x06F7 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
M.18 0x0700-0x0707 SCI0
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0700 SCI0BDH1RSBR15 SBR14 SBR13 SBR12 SBR11 SBR10 SBR9 SBR8
W
0x0701 SCI0BDL1RSBR7 SBR6 SBR5 SBR4 SBR3 SBR2 SBR1 SBR0
W
0x0702 SCI0CR11RLOOPS SCISWAI RSRC M WAKE ILT PE PT
W
0x0700 SCI0ASR12RRXEDGIF 0000BERRV
BERRIF BKDIF
W
0x0701 SCI0ACR12RRXEDGIE 00000
BERRIE BKDIE
W
0x0702 SCI0ACR22RIREN TNP1 TNP0 00
BERRM1 BERRM0 BKDFE
W
0x0703 SCI0CR2 RTIE TCIE RIE ILIE TE RE RWU SBK
W
0x0704 SCI0SR1 R TDRE TC RDRF IDLE OR NF FE PF
W
0x0705 SCI0SR2 RAMAP 00
TXPOL RXPOL BRK13 TXDIR RAF
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 975
0x0706 SCI0DRH RR8 T8 000000
W
0x0707 SCI0DRL RR7R6R5R4R3R2R1R0
WT7T6T5T4T3T2T1T0
1 These registers are accessible if the AMAP bit in the SCISR2 register is set to zero.
2 These registers are accessible if the AMAP bit in the SCISR2 register is set to one.
M.19 0x0710-0x0717 SCI1
Address Name Bit 7 6 5 4 3 2 1 Bit 0
0x0710 SCI1BDH1RSBR15 SBR14 SBR13 SBR12 SBR11 SBR10 SBR9 SBR8
W
0x0711 SCI1BDL1RSBR7 SBR6 SBR5 SBR4 SBR3 SBR2 SBR1 SBR0
W
0x0712 SCI1CR11RLOOPS SCISWAI RSRC M WAKE ILT PE PT
W
0x0710 SCI1ASR12RRXEDGIF 0000BERRV
BERRIF BKDIF
W
0x0711 SCI1ACR12RRXEDGIE 00000
BERRIE BKDIE
W
0x0712 SCI1ACR22RIREN TNP1 TNP0 00
BERRM1 BERRM0 BKDFE
W
0x0713 SCI1CR2 RTIE TCIE RIE ILIE TE RE RWU SBK
W
0x0714 SCI1SR1 R TDRE TC RDRF IDLE OR NF FE PF
W
0x0715 SCI1SR2 RAMAP 00
TXPOL RXPOL BRK13 TXDIR RAF
W
0x0716 SCI1DRH RR8 T8 000000
W
0x0717 SCI1DRL RR7R6R5R4R3R2R1R0
WT7T6T5T4T3T2T1T0
1 These registers are accessible if the AMAP bit in the SCISR2 register is set to zero.
2 These registers are accessible if the AMAP bit in the SCISR2 register is set to one.
M.18 0x0700-0x0707 SCI0
Address Name Bit 7 6 5 4 3 2 1 Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
976 Freescale Semiconductor
M.20 0x0780-0x0787 SPI0
Address Register
Name Bit 7654321Bit 0
0x0780 SPI0CR1 RSPIE SPE SPTIE MSTR CPOL CPHA SSOE LSBFE
W
0x0781 SPI0CR2 R0 XFRW 0MODFEN BIDIROE 0SPISWAI SPC0
W
0x0782 SPI0BR R0 SPPR2 SPPR1 SPPR0 0SPR2 SPR1 SPR0
W
0x0783 SPI0SR R SPIF 0 SPTEF MODF 0 0 0 0
W
0x0784 SPI0DRH R R15 R14 R13 R12 R11 R10 R9 R8
T15 T14 T13 T12 T11 T10 T9 T8W
0x0785 SPI0DRL RR7R6R5R4R3R2R1R0
T7 T6 T5 T4 T3 T2 T1 T0W
0x0786 Reserved R
W
0x0787 Reserved R
W
M.21 0x0800–0x083F CAN0
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0x0800 CAN0CTL0 RRXFRM RXACT CSWAI SYNCH TIME WUPE SLPRQ INITRQ
W
0x0801 CAN0CTL1 RCANE CLKSRC LOOPB LISTEN BORM WUPM SLPAK INITAK
W
0x0802 CAN0BTR0 RSJW1 SJW0 BRP5 BRP4 BRP3 BRP2 BRP1 BRP0
W
0x0803 CAN0BTR1 RSAMP TSEG22 TSEG21 TSEG20 TSEG13 TSEG12 TSEG11 TSEG10
W
0x0804 CAN0RFLG RWUPIF CSCIF RSTAT1 RSTAT0 TSTAT1 TSTAT0 OVRIF RXF
W
0x0805 CAN0RIER RWUPIE CSCIE RSTATE1 RSTATE0 TSTATE1 TSTATE0 OVRIE RXFIE
W
0x0806 CAN0TFLG R00000
TXE2 TXE1 TXE0
W
0x0807 CAN0TIER R00000
TXEIE2 TXEIE1 TXEIE0
W
0x0808 CAN0TARQ R00000
ABTRQ2 ABTRQ1 ABTRQ0
W
0x0809 CAN0TAAK R00000ABTAK2ABTAK1ABTAK0
W
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
Freescale Semiconductor 977
0x080A CAN0TBSEL R00000
TX2 TX1 TX0
W
0x080B CAN0IDAC R0 0 IDAM1 IDAM0 0 IDHIT2 IDHIT1 IDHIT0
W
0x080C Reserved R00000000
W
0x080D CAN0MISC R0000000
BOHOLD
W
0x080E CAN0RXERR R RXERR7 RXERR6 RXERR5 RXERR4 RXERR3 RXERR2 RXERR1 RXERR0
W
0x080F CAN0TXERR R TXERR7 TXERR6 TXERR5 TXERR4 TXERR3 TXERR2 TXERR1 TXERR0
W
0x0810–
0x0813
CAN0IDAR0–
CAN0IDAR3
RAC7 AC6 AC5 AC4 AC3 AC2 AC1 AC0
W
0x0814–
0x0817
CAN0IDMR0–
CAN0IDMR3
RAM7AM6AM5AM4AM3AM2AM1AM0
W
0x0818–
0x081B
CAN0IDAR4–
CAN0IDAR7
RAC7 AC6 AC5 AC4 AC3 AC2 AC1 AC0
W
0x081C–
0x081F
CAN0IDMR4–
CAN0IDMR7
RAM7AM6AM5AM4AM3AM2AM1AM0
W
0x0820–
0x082F CAN0RXFG R FOREGROUND RECEIVE BUFFER
W
0x0830–
0x083F CAN0TXFG RFOREGROUND TRANSMIT BUFFER
W
M.21 0x0800–0x083F CAN0
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Appendix M Detailed Register Address Map
MC9S12ZVM Family Reference Manual Rev. 2.2
978 Freescale Semiconductor
M.22 0x0980-0x0987 LINPHY0
M.23 0x0990-0x0997 CANPHY
Address Name Bit 7654321Bit 0
0x0980 LP0DR R000000
LPDR1 LPDR0
W
0x0981 LP0CR R0000
LPE RXONLY LPWUE LPPUE
W
0x0982 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0983 LP0SLRM RLPDTDIS00000
LPSLR1 LPSLR0
W
0x0984 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0985 LP0SR RLPDT0000000
W
0x0986 LP0IE RLPDTIE LPOCIE 000000
W
0x0987 LP0IF RLPDTIF LPOCIF 000000
W
Address Register
Name Bit 7654321Bit 0
0x0990 CPDR RCPDR700000
CPDR1 CPDR0
W
0x0991 CPCR RCPE SPE WUPE1-0 0SLR2-0
W
0x0992 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0993 CPSR R CPCHVH CPCHVL CPCLVH CPCLVL CPDT 0 0 0
W
0x0994 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0995 Reserved RReserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
W
0x0996 CPIE R0 0 0 CPVFIE CPDTIE 00
CPOCIE
W
0x0997 CPIF RCHVHIF CHVLIF CLVHIF CLVLIF CPDTIF 0CHOCIF CLOCIF
W
= Unimplemented or Reserved
MC9S12ZVMRMV1
Rev. 2.2
27 APR 2015
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