PS019924-0113 PREL I M I NARY Foreword
Z8 Encore! XP® F64xx Series
Product Specification
ii
DO NOT USE THIS PRODUCT IN LIFE SUPPORT SYSTEMS.
LIFE SUPPORT POLICY
ZILOG’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE
SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF
THE PRESIDENT AND GENERAL COUNSEL OF ZILOG CORPORATION.
As used herein
Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b)
support or sustain life and whose failure to perform when properly used in accordance with instructions for
use provided in the labeling can be reasonably expected to result in a significant injury to the user. A criti-
cal compon ent is a ny comp onent in a life su pport dev ice or s ystem wh ose failu re to pe rform can be reason -
ably expected to cause the failure of the life support device or system or to affect its safety or effectiveness.
Document Disclaimer
©2013 Zilog, Inc. All rights reserved. Information in this publication concerning the devices, applications,
or technology described is intended to suggest possible uses and may be superseded. ZILOG, INC. DOES
NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF ACCURACY OF THE
INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED IN THIS DOCUMENT. ZILOG ALSO
DOES NOT ASSUME LIABILITY FOR INTELLECTUAL PROPERTY INFRING EMENT RELATED
IN ANY MANNER TO USE OF INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED
HEREIN OR OTHERWISE. The information contained within this document has been verified according
to the general principles of electrical and mechanical engineering.
Z8, Z8 Encore!, Z8 Encore! XP and Z8 Encore! MC are trademarks or registered trademarks of Zilog, Inc.
All other product or service names are the property of their respective owners.
Warning:
PS019924-0113 PR E L I M I NARY Revision History
Z8 Encore! XP® F64xx Series
Product Specification
iii
Revision History
Each instance in the Revision History table reflects a change to this document from its pre-
vious revision. For more details, refer to the corresponding pages or appropriate links
listed in the table below.
Date Revision
Level Description Page
Jan
2013 24 Restored 40-pin PDIP package to Signal and Pin Descriptions and Packag-
ing chapters . 7, 286
Feb
2012 23 Corrected formatting of IDDS section, Table 107; corrected language in the
General Purpose RAM section of Appendix A; 202, 248
Sep
2011 22 Revised Flash Sector Protect Register description; revised Packaging
chapter. 178, 286
Mar
2008 21 Changed title to Z8 Encore! XP F64xx Series. All
Feb
2008 20 Changed Z8 Encore! XP 64K Series Flash Microcontrollers to Z8 Encore!
XP F64xx Series Flash Microcontrollers. Deleted three sentences that men-
tioned Z8R642. Removed the 40 PDIP package. Added
ZENETSC0100ZACG to the end of the Ordering Information table.
Changed the flag status to unaffected for BIT, BSET, and BCLR in the eZ8
CPU Instruction Summary table.
287, 234
Dec
2007 19 Updated Zilog logo, Disclaimer section, and implemented style guide.
Updated Table 113. Changed Z8 Encore! 64K Series to Z8 Encore! XP 64K
Series Flash Microcontrollers throughout the document.
All
Dec
2006 18 Updated Flash Memory Electrical Characteristics and Timing table and
Ordering Information chapter. 213, 287
Nov
2006 17 Updated Part Number Suffix Designations section. 292
PS019924-0113 PR E L I M I NARY Table of Contents
Z8 Encore! XP® F64xx Series
Product Specification
iv
Table of Contents
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Part Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CPU and Peripheral Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General-Purpose Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Flash Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
10-Bit Analog-to-Digital Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
UARTs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
I2C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Serial Peripheral Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Interrupt Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Reset Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
On-Chip Debugger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DMA Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Signal and Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Available Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Pin Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Address Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Register File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Program Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Data Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Information Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Register File Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Reset and Stop Mode Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Reset Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Reset Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Voltage Brown-Out Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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Watchdog Timer Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
External Pin Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
On-Chip Debugger Initiated Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Stop Mode Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Stop Mode Recovery Using Watchdog Timer Time-Out . . . . . . . . . . . . . . . . . 33
Stop Mode Recovery Using a GPIO Port Pin Transition HALT . . . . . . . . . . . . 33
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
STOP Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
HALT Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
General-Purpose I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
GPIO Port Availability By Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
GPIO Alternate Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
GPIO Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
GPIO Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Port A–H Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Port A–H Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Port A–H Input Data Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Port A–H Output Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Interrupt Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Interrupt Vector Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Master Interrupt Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Interrupt Vectors and Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Interrupt Assertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Software Interrupt Assertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Interrupt Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Interrupt Request 0 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Interrupt Request 1 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Interrupt Request 2 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
IRQ0 Enable High and Low Bit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
IRQ1 Enable High and Low Bit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
IRQ2 Enable High and Low Bit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Interrupt Edge Select Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Interrupt Port Select Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Interrupt Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
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Z8 Encore! XP® F64xx Series
Product Specification
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Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Timer Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Reading the Timer Count Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Timer Output Signal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Timer Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Timer 0–3 High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Timer Reload High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Timer 0–3 PWM High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . 75
Timer 0–3 Control 0 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Timer 0–3 Control 1 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Watchdog Timer Refresh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Watchdog Timer Time-Out Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Watchdog Timer Reload Unlock Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Watchdog Timer Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Watchdog Timer Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Watchdog Timer Reload Upper, High and Low Byte Registers . . . . . . . . . . . . 85
Universal Asynchronous Receiver/Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Transmitting Data using the Polled Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Transmitting Data using the Interrupt-Driven Method . . . . . . . . . . . . . . . . . . . 90
Receiving Data using the Polled Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Receiving Data using the Interrupt-Driven Method . . . . . . . . . . . . . . . . . . . . . . 92
Clear To Send (CTS) Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
MULTIPROCESSOR (9-bit) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
External Driver Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
UART Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
UART Baud Rate Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
UART Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
UART Transmit Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
UART Receive Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
UART Status 0 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
UART Status 1 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
UART Control 0 and Control 1 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
UART Address Compare Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
UART Baud Rate High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . 105
Infrared Encoder/Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
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Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Transmitting IrDA Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Receiving IrDA Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Infrared Encoder/Decoder Control Register Definitions . . . . . . . . . . . . . . . . . . . . 112
Serial Peripheral Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
SPI Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
SPI Clock Phase and Polarity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Multimaster Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Slave Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Error Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
SPI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
SPI Baud Rate Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
SPI Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
SPI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
SPI Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
SPI Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
SPI Mode Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
SPI Diagnostic State Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
SPI Baud Rate High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . . 126
I2C Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
SDA and SCL Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
I2C Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Software Control of I2C Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Start and Stop Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Master Write and Read Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Address Only Transaction with a 7-bit Address . . . . . . . . . . . . . . . . . . . . . . . 133
Write Transaction with a 7-Bit Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Address Only Transaction with a 10-bit Address . . . . . . . . . . . . . . . . . . . . . . 135
Write Transaction with a 10-Bit Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Read Transaction with a 7-Bit Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Read Transaction with a 10-Bit Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
I2C Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
I2C Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
I2C Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
I2C Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
I2C Baud Rate High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . . 145
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viii
I2C Diagnostic State Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
I2C Diagnostic Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Direct Memory Access Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Configuring DMA0 and DMA1 for Data Transfer . . . . . . . . . . . . . . . . . . . . . 150
DMA_ADC Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Configuring DMA_ADC for Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
DMA Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
DMAx Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
DMAx I/O Address Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
DMAx Address High Nibble Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
DMAx Start/Current Address Low Byte Register . . . . . . . . . . . . . . . . . . . . . . 156
DMAx End Address Low Byte Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
DMA_ADC Address Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
DMA_ADC Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
DMA_ADC Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Analog-to-Digital Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Automatic Power-Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Single-Shot Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Continuous Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
DMA Control of the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
ADC Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
ADC Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
ADC Data High Byte Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
ADC Data Low Bits Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Information Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Timing Using the Flash Frequency Registers . . . . . . . . . . . . . . . . . . . . . . . . . 171
Flash Read Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Flash Write/Erase Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Byte Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Page Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Mass Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Flash Controller Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Flash Controller Behavior in Debug Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Flash Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Flash Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
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Flash Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Page Select Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Flash Sector Protect Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Flash Frequency High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . 179
Option Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Option Bit Configuration By Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Option Bit Address Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Flash Memory Address 0000H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Flash Memory Address 0001H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
On-Chip Debugger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
OCD Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
DEBUG Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
OCD Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
OCD Autobaud Detector/Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
OCD Serial Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Breakpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
On-Chip Debugger Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
On-Chip Debugger Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . 193
OCD Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
OCD Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
On-Chip Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Crystal Oscillator Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Oscillator Operation with an External RC Network . . . . . . . . . . . . . . . . . . . . . . . . 198
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
On-Chip Peripheral AC and DC Electrical Characteristics . . . . . . . . . . . . . . . . . . 211
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
General-Purpose I/O Port Input Data Sample Timing . . . . . . . . . . . . . . . . . . . 217
General-Purpose I/O Port Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
On-Chip Debugger Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
SPI Master Mode Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
SPI Slave Mode Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
I2C Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
UART Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
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eZ8 CPU Instruction Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Assembly Language Programming Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Assembly Language Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
eZ8 CPU Instruction Notation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Condition Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
eZ8 CPU Instruction Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
eZ8 CPU Instruction Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Flags Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Op Code Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Appendix A. Register Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
General Purpose RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Timer 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Universal Asynchronous Receiver/Transmitter (UART) . . . . . . . . . . . . . . . . . . . . 256
Inter-Integrated Circuit (I2C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Serial Peripheral Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Analog-to-Digital Converter (ADC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Direct Memory Access (DMA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Interrupt Request (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
General-Purpose Input/Output (GPIO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Part Number Suffix Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
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Z8 Encore! XP® F64xx Series
Product Specification
xi
List of Figures
Figure 1. Z8 Encore! XP F64xx Series Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 2. Z8 Encore! XP F64xx Series in 40-Pin Dual Inline Package (PDIP) . . . . . . 8
Figure 3. Z8 Encore! XP F64xx Series in 44-Pin Plastic Leaded Chip Carrier (PLCC) 9
Figure 4. Z8 Encore! XP F64xx Series in 44-Pin Low-Profile Quad Flat
Package (LQFP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 5. Z8 Encore! XP F64xx Series in 64-Pin Low-Profile Quad Flat
Package (LQFP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 6. Z8 Encore! XP F64xx Series in 68-Pin Plastic Leaded Chip
Carrier (PLCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 7. Z8 Encore! XP F64xx Series in 80-Pin Quad Flat Package (QFP) . . . . . . . 13
Figure 8. Power-On Reset Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 9. Voltage Brown-Out Reset Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 10. GPIO Port Pin Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 11. Interrupt Controller Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 12. Timer Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Figure 13. UART Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Figure 14. UART Asynchronous Data Format without Parity . . . . . . . . . . . . . . . . . . . 89
Figure 15. UART Asynchronous Data Format with Parity . . . . . . . . . . . . . . . . . . . . . . 89
Figure 16. UART Asynchronous MULTIPROCESSOR Mode Data Format . . . . . . . 93
Figure 17. UART Driver Enable Signal Timing (shown with 1 Stop Bit and Parity) . 95
Figure 18. UART Receiver Interrupt Service Routine Flow . . . . . . . . . . . . . . . . . . . . 97
Figure 19. Infrared Data Communication System Block Diagram . . . . . . . . . . . . . . 109
Figure 20. Infrared Data Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Figure 21. Infrared Data Reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Figure 22. SPI Configured as a Master in a Single-Master, Single-Slave System . . . 113
Figure 23. SPI Configured as a Master in a Single-Master, Multiple-Slave System . 114
Figure 24. SPI Configured as a Slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Figure 25. SPI Timing When PHASE is 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Figure 26. SPI Timing When PHASE is 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Figure 27. I2C Controller Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Figure 28. 7-Bit Address Only Transaction Format . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Figure 29. 7-Bit Addressed Slave Data Transfer Format . . . . . . . . . . . . . . . . . . . . . . 134
Figure 30. 10-Bit Address Only Transaction Format . . . . . . . . . . . . . . . . . . . . . . . . . 135
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Product Specification
xii
Figure 31. 10-Bit Addressed Slave Data Transfer Format . . . . . . . . . . . . . . . . . . . . . 136
Figure 32. Receive Data Transfer Format for a 7-Bit Addressed Slave . . . . . . . . . . . 138
Figure 33. Receive Data Format for a 10-Bit Addressed Slave . . . . . . . . . . . . . . . . . 139
Figure 34. Analog-to-Digital Converter Block Diagram . . . . . . . . . . . . . . . . . . . . . . 162
Figure 35. Flash Memory Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Figure 36. On-Chip Debugger Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Figure 37. Interfacing the On-Chip Debugger’s DBG Pin with an RS-232 Interface,
#1 of 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Figure 38. Interfacing the On-Chip Debugger’s DBG Pin with an RS-232 Interface,
#2 of 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Figure 39. OCD Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Figure 40. Recommended 20 MHz Crystal Oscillator Configuration . . . . . . . . . . . . . 197
Figure 41. Connecting the On-Chip Oscillator to an External RC Network . . . . . . . . 198
Figure 42. Typical RC Oscillator Frequency as a Function of the External
Capacitance with a 45 kΩ Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Figure 43. Typical Activ e Mode Idd vs. System Clock Frequency . . . . . . . . . . . . . . 205
Figure 44. Maximum Active Mode Idd vs. System Clock Frequency . . . . . . . . . . . . 206
Figure 45. Typical HALT Mode Idd vs. System Clock Frequency . . . . . . . . . . . . . . 207
Figure 46. Maximum HALT Mode Icc vs. System Clock Frequency . . . . . . . . . . . . 208
Figure 47. Maximum STOP Mode IDD with VBO Enabled vs. Power Supply
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Figure 48. Maximum STOP Mode IDD with VBO Disabled vs. Power Sup ply
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Figure 49. Analog-to-Digital Con verter Frequency Response . . . . . . . . . . . . . . . . . . 215
Figure 50. Port Input Sample Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Figure 51. GPIO Port Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Figure 52. On-Chip Debugger Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Figure 53. SPI Master Mode Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Figure 54. SPI Slave Mode Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Figure 55. I2C Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Figure 56. UART Timing with CTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Figure 57. UART Timing without CTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Figure 58. Flags Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Figure 59. Op Code Map Cell Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Figure 60. First Op Code Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Figure 61. Second Op Code Map after 1FH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
PS019924-0113 PR E L I M I NARY List of Tables
Z8 Encore! XP® F64xx Series
Product Specification
xiii
List of Tables
Table 1. Z8 Encore! XP F64xx Series Part Selection Guide . . . . . . . . . . . . . . . . . . . . 2
Table 2. Z8 Encore! XP F64xx Series Package Options . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 4. Pin Characteristics of the Z8 Encore! XP F64xx Series . . . . . . . . . . . . . . . 17
Table 5. Z8 Encore! XP F64xx Series Program Memory Maps . . . . . . . . . . . . . . . . 19
Table 6. Z8 Encore! XP F64xx Series Information Area Map . . . . . . . . . . . . . . . . . 21
Table 7. Z8 Encore! XP F64xx Series Register File Address Map . . . . . . . . . . . . . . 22
Table 8. Reset and Stop Mode Recovery Characteristics and Latency . . . . . . . . . . . 28
Table 9. Reset Sources and Resulting Reset Type . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 10. Stop Mode Recovery Sources and Resulting Action . . . . . . . . . . . . . . . . . . 33
Table 11. Port Availability by Device and Package Type . . . . . . . . . . . . . . . . . . . . . . 36
Table 12. Port Alternate Function Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 13. GPIO Port Registers and Subregisters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 14. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . . 40
Table 15. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 16. Port A–H Data Direction Subregisters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 17. Port A–H Alternate Function Subregisters . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 18. Port A–H Output Control Subregisters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 19. Port A–H High Drive Enable Subregisters . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 20. Port A–H Stop Mode Re covery Source Enable Subregisters . . . . . . . . . . . 45
Table 21. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 22. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 23. Interrupt Vectors in Order of Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 24. Interrupt Request 0 Register (IRQ0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 25. Interrupt Request 1 Register (IRQ1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 26. Interrupt Request 2 Register (IRQ2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 27. IRQ0 Enable and Priority Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 28. IRQ0 Enable High Bit Register (IRQ0ENH) . . . . . . . . . . . . . . . . . . . . . . . 55
Table 29. IRQ0 Enable Low Bit Register (IRQ0ENL) . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 30. IRQ1 Enable and Priority Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 31. IRQ1 Enable High Bit Register (IRQ1ENH) . . . . . . . . . . . . . . . . . . . . . . . 57
Table 32. IRQ1 Enable Low Bit Register (IRQ1ENL) . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 33. IRQ2 Enable and Priority Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
PS019924-0113 PR E L I M I NARY List of Tables
Z8 Encore! XP® F64xx Series
Product Specification
xiv
Table 34. IRQ2 Enable High Bit Register (IRQ2ENH) . . . . . . . . . . . . . . . . . . . . . . . 58
Table 35. IRQ2 Enable Low Bit Register (IRQ2ENL) . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 36. Interrupt Edge Select Register (IRQES) . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 37. Interrupt Port Select Register (IRQPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 38. Interrupt Control Register (IRQCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 39. Timer 0–3 High Byte Register (TxH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 40. Timer 0–3 Low Byte Register (TxL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 41. Timer 0–3 Reload High Byte Register (TxRH) . . . . . . . . . . . . . . . . . . . . . . 74
Table 42. Timer 0–3 Reload Low Byte Register (TxRL) . . . . . . . . . . . . . . . . . . . . . . 74
Table 43. Timer 0–3 PWM High Byte Register (TxPWMH) . . . . . . . . . . . . . . . . . . . 75
Table 44. Timer 0–3 PWM Low Byte Register (TxPWML) . . . . . . . . . . . . . . . . . . . . 75
Table 45. Timer 0–3 Control 0 Register (TxCTL0) . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Table 46. Timer 0–3 Control 1 Register (TxCTL1) . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 47. Watchdo g Timer Approximate Time-Out Delays . . . . . . . . . . . . . . . . . . . . 81
Table 48. Watchdog Timer Control Register (WDTCTL) . . . . . . . . . . . . . . . . . . . . . 84
Table 49. Watchdog Timer Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Table 50. Watchdog Timer Reload Upper Byte Register (WDTU) . . . . . . . . . . . . . . 85
Table 51. Watchdog Timer Reload High Byte Register (WDTH) . . . . . . . . . . . . . . . 86
Table 52. Watchdog Timer Reload Low Byte Register (WDTL) . . . . . . . . . . . . . . . . 86
Table 53. UART Transmit Data Register (UxTXD) . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Table 54. UART Receive Data Register (UxRXD) . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Table 55. UART Status 0 Register (UxSTAT0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Table 56. UART Status 1 Register (UxSTAT1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Table 57. UART Control 0 Register (UxCTL0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Table 58. UART Control 1 Register (UxCTL1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Table 59. UART Address Compare Register (UxADDR) . . . . . . . . . . . . . . . . . . . . . 105
Table 60. UART Baud Rate High Byte Register (UxBRH) . . . . . . . . . . . . . . . . . . . 106
Table 61. UART Baud Rate Low Byte Register (UxBRL) . . . . . . . . . . . . . . . . . . . . 106
Table 62. UART Baud Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Table 63. SPI Clock Phase (PHASE) and Clock Polarity (CLKPOL) Operation . . . 117
Table 64. SPI Data Register (SPIDATA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Table 65. SPI Control Register (SPICTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Table 66. SPI Status Register (SPISTAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Table 67. SPI Mode Register (SPIMODE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Table 68. SPI Diagnostic State Register (SPIDST) . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Table 69. SPI Baud Rate High Byte Register (SPIBRH) . . . . . . . . . . . . . . . . . . . . . 127
PS019924-0113 PR E L I M I NARY List of Tables
Z8 Encore! XP® F64xx Series
Product Specification
xv
Table 70. SPI Baud Rate Low Byte Register (SPIBRL) . . . . . . . . . . . . . . . . . . . . . . 127
Table 71. I2C Data Register (I2CDATA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Table 72. I2C Status Register (I2CSTAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Table 73. I2C Control Register (I2CCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Table 74. I2C Baud Rate Low Byte Register (I2CBRL) . . . . . . . . . . . . . . . . . . . . . . 146
Table 75. I2C Baud Rate High Byte Register (I2CBRH) . . . . . . . . . . . . . . . . . . . . . 146
Table 76. I2C Diagnostic State Register (I2CDST) . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Table 77. I2C Diagnostic Control Register (I2CDIAG) . . . . . . . . . . . . . . . . . . . . . . 149
Table 78. DMAx Control Register (DMAxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Table 79. DMAx I/O Address Register (DMAxIO) . . . . . . . . . . . . . . . . . . . . . . . . . 154
Table 80. DMAx Address High Nibble Register (DMAxH) . . . . . . . . . . . . . . . . . . . 155
Table 81. DMAx Start/Current Address Low Byte Register (DMAxSTART) . . . . . 156
Table 82. DMAx End Address Low Byte Register (DMAxEND) . . . . . . . . . . . . . . 156
Table 83. DMA_ADC Register File Address Example . . . . . . . . . . . . . . . . . . . . . . . 157
Table 84. DMA_ADC Control Register (DMAACTL) . . . . . . . . . . . . . . . . . . . . . . . 158
Table 85. DMA_ADC Address Register (DMAA_ADDR) . . . . . . . . . . . . . . . . . . . 158
Table 86. DMA_ADC Status Register (DMAA_STAT) . . . . . . . . . . . . . . . . . . . . . . 159
Table 87. ADC Control Register (ADCCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Table 88. ADC Data High Byte Register (ADCD_H) . . . . . . . . . . . . . . . . . . . . . . . . 167
Table 89. ADC Data Low Bits Register (ADCD_L) . . . . . . . . . . . . . . . . . . . . . . . . . 168
Table 90. Flash Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Table 91. Flash Memory Sector Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Table 92. Z8 Encore! XP F64xx Series Information Area Map . . . . . . . . . . . . . . . . 171
Table 93. Flash Control Register (FCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Table 94. Flash Status Register (FSTAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Table 95. Flash Sector Protect Register (FPROT) . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Table 96. Page Select Register (FPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Table 97. Flash Frequency High Byte Register (FFREQH) . . . . . . . . . . . . . . . . . . . 179
Table 98. Flash Frequency Low Byte Register (FFREQL) . . . . . . . . . . . . . . . . . . . . 179
Table 99. Flash Option Bits At Flash Memory Address 0000H . . . . . . . . . . . . . . . . 181
Table 100. Options Bits at Flash Memory Address 0001H . . . . . . . . . . . . . . . . . . . . . 182
Table 101. OCD Baud-Rate Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Table 102. On-Chip Debugger Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Table 103. OCD Control Register (OCDCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Table 104. OCD Status Register (OCDSTAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Table 105. Recommended Crystal Oscillator Specifications (20 MHz Operation) . . . 197
PS019924-0113 PR E L I M I NARY List of Tables
Z8 Encore! XP® F64xx Series
Product Specification
xvi
Table 106. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Table 107. DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Table 108. Power-On Reset and Voltage Brown-Out Electrical Characteristics
and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Table 109. Reset and Stop Mode Recovery Pin Timing . . . . . . . . . . . . . . . . . . . . . . . 212
Table 110. External RC Oscillator Electrical Characteristics and Timing . . . . . . . . . 212
Table 111. Flash Memory Electrical Characteristics and Timing . . . . . . . . . . . . . . . . 213
Table 112. Watchdog Timer Ele ctrical Characteristics and Timing . . . . . . . . . . . . . . 213
Table 113. Analog-to-Digital Converter Electrical Characteristics and Timing . . . . . 214
Table 114. AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Table 115. GPIO Port Input Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Table 116. GPIO Port Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Table 117. On-Chip Debugger Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Table 118. SPI Master Mode Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Table 119. SPI Slave Mode Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Table 120. I2C Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Table 121. UART Timing with CTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Table 122. UART Timing without CTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Table 123. Assembly Language Syntax Example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Table 124. Assembly Language Syntax Example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Table 125. Notational Shorthand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Table 126. Additional Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Table 127. Condition Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Table 128. Arithmetic Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Table 129. Bit Manipulation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Table 130. Block Transfer Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Table 131. CPU Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Table 132. Load Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Table 133. Logical Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Table 134. Program Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Table 135. Rotate and Shift Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Table 136. eZ8 CPU Instruction Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Table 137. Op Code Map Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Table 138. Timer 0–3 High Byte Register (TxH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Table 139. Timer 0–3 Low Byte Register (TxL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Table 140. Timer 0–3 Reload High Byte Register (TxRH) . . . . . . . . . . . . . . . . . . . . . 249
PS019924-0113 PR E L I M I NARY List of Tables
Z8 Encore! XP® F64xx Series
Product Specification
xvii
Table 141. Timer 0–3 Reload Low Byte Register (TxRL) . . . . . . . . . . . . . . . . . . . . . 249
Table 142. Timer 0–3 PWM High Byte Register (TxPWMH) . . . . . . . . . . . . . . . . . . 249
Table 143. Timer 0–3 PWM Low Byte Register (TxPWML) . . . . . . . . . . . . . . . . . . . 250
Table 144. Timer 0–3 Control 0 Register (TxCTL0) . . . . . . . . . . . . . . . . . . . . . . . . . 250
Table 145. Timer 0–3 Control 1 Register (TxCTL1) . . . . . . . . . . . . . . . . . . . . . . . . . 250
Table 146. Timer 0–3 High Byte Register (TxH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Table 147. Timer 0–3 Low Byte Register (TxL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Table 148. Timer 0–3 Reload High Byte Register (TxRH) . . . . . . . . . . . . . . . . . . . . . 251
Table 149. Timer 0–3 Reload Low Byte Register (TxRL) . . . . . . . . . . . . . . . . . . . . . 251
Table 150. Timer 0–3 PWM High Byte Register (TxPWMH) . . . . . . . . . . . . . . . . . . 251
Table 151. Timer 0–3 PWM Low Byte Register (TxPWML) . . . . . . . . . . . . . . . . . . . 252
Table 152. Timer 0–3 Control 0 Register (TxCTL0) . . . . . . . . . . . . . . . . . . . . . . . . . 252
Table 153. Timer 0–3 Control 1 Register (TxCTL1) . . . . . . . . . . . . . . . . . . . . . . . . . 252
Table 154. Timer 0–3 High Byte Register (TxH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Table 155. Timer 0–3 Low Byte Register (TxL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Table 156. Timer 0–3 Reload High Byte Register (TxRH) . . . . . . . . . . . . . . . . . . . . . 253
Table 157. Timer 0–3 Reload Low Byte Register (TxRL) . . . . . . . . . . . . . . . . . . . . . 253
Table 158. Timer 0–3 PWM High Byte Register (TxPWMH) . . . . . . . . . . . . . . . . . . 253
Table 159. Timer 0–3 PWM Low Byte Register (TxPWML) . . . . . . . . . . . . . . . . . . . 254
Table 160. Timer 0–3 Control 0 Register (TxCTL0) . . . . . . . . . . . . . . . . . . . . . . . . . 254
Table 161. Timer 0–3 Control 1 Register (TxCTL1) . . . . . . . . . . . . . . . . . . . . . . . . . 254
Table 162. Timer 0–3 High Byte Register (TxH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Table 163. Timer 0–3 Low Byte Register (TxL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Table 164. Timer 0–3 Reload High Byte Register (TxRH) . . . . . . . . . . . . . . . . . . . . . 255
Table 165. Timer 0–3 Reload Low Byte Register (TxRL) . . . . . . . . . . . . . . . . . . . . . 255
Table 166. Timer 0–3 PWM High Byte Register (TxPWMH) . . . . . . . . . . . . . . . . . . 255
Table 167. Timer 0–3 PWM Low Byte Register (TxPWML) . . . . . . . . . . . . . . . . . . . 256
Table 168. Timer 0–3 Control 0 Register (TxCTL0) . . . . . . . . . . . . . . . . . . . . . . . . . 256
Table 169. Timer 0–3 Control 1 Register (TxCTL1) . . . . . . . . . . . . . . . . . . . . . . . . . 256
Table 170. UART Transmit Data Register (UxTXD) . . . . . . . . . . . . . . . . . . . . . . . . . 257
Table 171. UART Receive Data Register (UxRXD) . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Table 172. UART Status 0 Register (UxSTAT0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Table 173. UART Control 0 Register (UxCTL0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Table 174. UART Control 1 Register (UxCTL1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Table 175. UART Status 1 Register (UxSTAT1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Table 176. UART Addre ss Compare Register (UxADDR) . . . . . . . . . . . . . . . . . . . . . 258
PS019924-0113 PR E L I M I NARY List of Tables
Z8 Encore! XP® F64xx Series
Product Specification
xviii
Table 177. UART Baud Rate High Byte Register (UxBRH) . . . . . . . . . . . . . . . . . . . 258
Table 178. UART Baud Rate Low Byte Register (UxBRL) . . . . . . . . . . . . . . . . . . . . 259
Table 179. UART Transmit Data Register (UxTXD) . . . . . . . . . . . . . . . . . . . . . . . . . 259
Table 180. UART Receive Data Register (UxRXD) . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Table 181. UART Status 0 Register (UxSTAT0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Table 182. UART Control 0 Register (UxCTL0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Table 183. UART Control 1 Register (UxCTL1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Table 184. UART Status 1 Register (UxSTAT1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Table 185. UART Addre ss Compare Register (UxADDR) . . . . . . . . . . . . . . . . . . . . . 260
Table 186. UART Baud Rate High Byte Register (UxBRH) . . . . . . . . . . . . . . . . . . . 261
Table 187. UART Baud Rate Low Byte Register (UxBRL) . . . . . . . . . . . . . . . . . . . . 261
Table 188. I2C Data Register (I2CDATA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Table 189. I2C Status Register (I2CSTAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Table 190. I2C Control Register (I2CCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Table 191. I2C Baud Rate High Byte Register (I2CBRH) . . . . . . . . . . . . . . . . . . . . . 262
Table 192. I2C Baud Rate Low Byte Register (I2CBRL) . . . . . . . . . . . . . . . . . . . . . . 262
Table 193. I2C Diagnostic State Register (I2CDST) . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Table 194. I2C Diagnostic Control Register (I2CDIAG) . . . . . . . . . . . . . . . . . . . . . . 263
Table 195. SPI Data Register (SPIDATA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Table 196. SPI Control Register (SPICTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Table 197. SPI Status Register (SPISTAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Table 198. SPI Mode Register (SPIMODE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Table 199. SPI Diagnostic State Register (SPIDST) . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Table 200. SPI Baud Rate High Byte Register (SPIBRH) . . . . . . . . . . . . . . . . . . . . . 265
Table 201. SPI Baud Rate Low Byte Register (SPIBRL) . . . . . . . . . . . . . . . . . . . . . . 265
Table 202. ADC Data High Byte Register (ADCD_H) . . . . . . . . . . . . . . . . . . . . . . . . 266
Table 203. ADC Data Low Bits Register (ADCD_L) . . . . . . . . . . . . . . . . . . . . . . . . . 266
Table 204. DMAx Control Register (DMAxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Table 205. DMAx I/O Address Register (DMAxIO) . . . . . . . . . . . . . . . . . . . . . . . . . 267
Table 206. DMAx Address High Nibble Regis ter (DMAxH) . . . . . . . . . . . . . . . . . . . 267
Table 207. DMAx Start/Current Address Low Byte Register (DMAxSTART) . . . . . 267
Table 208. DMAx End Address Low Byte Register (DMAxEND) . . . . . . . . . . . . . . 268
Table 209. DMAx Control Register (DMAxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Table 210. DMAx I/O Address Register (DMAxIO) . . . . . . . . . . . . . . . . . . . . . . . . . 268
Table 211. DMAx Address High Nibble Regis ter (DMAxH) . . . . . . . . . . . . . . . . . . . 269
Table 212. DMAx Start/Current Address Low Byte Register (DMAxSTART) . . . . . 269
PS019924-0113 PR E L I M I NARY List of Tables
Z8 Encore! XP® F64xx Series
Product Specification
xix
Table 213. DMAx End Address Low Byte Register (DMAxEND) . . . . . . . . . . . . . . 269
Table 214. DMA_ADC Addre ss Register (DMAA_ADDR) . . . . . . . . . . . . . . . . . . . 269
Table 215. DMA_ADC Control Register (DMAACTL) . . . . . . . . . . . . . . . . . . . . . . . 270
Table 216. DMA_ADC Status Register (DMAA_STAT) . . . . . . . . . . . . . . . . . . . . . . 270
Table 217. Interrupt Request 0 Register (IRQ0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Table 218. IRQ0 Enable High Bit Register (IRQ0ENH) . . . . . . . . . . . . . . . . . . . . . . 271
Table 219. IRQ0 Enable Low Bit Register (IRQ0ENL) . . . . . . . . . . . . . . . . . . . . . . . 271
Table 220. Interrupt Request 1 Register (IRQ1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Table 221. IRQ1 Enable High Bit Register (IRQ1ENH) . . . . . . . . . . . . . . . . . . . . . . 271
Table 222. IRQ1 Enable Low Bit Register (IRQ1ENL) . . . . . . . . . . . . . . . . . . . . . . . 272
Table 223. Interrupt Request 2 Register (IRQ2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Table 224. IRQ2 Enable High Bit Register (IRQ2ENH) . . . . . . . . . . . . . . . . . . . . . . 272
Table 225. IRQ2 Enable Low Bit Register (IRQ2ENL) . . . . . . . . . . . . . . . . . . . . . . . 272
Table 226. Interrupt Edge Select Register (IRQES) . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Table 227. Interrupt Port Select Register (IRQPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Table 228. Interrupt Control Register (IRQCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Table 229. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . 274
Table 230. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Table 231. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Table 232. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . 275
Table 233. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . 275
Table 234. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Table 235. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Table 236. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . 276
Table 237. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . 276
Table 238. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Table 239. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Table 240. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . 277
Table 241. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . 277
Table 242. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Table 243. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Table 244. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . 278
Table 245. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . 278
Table 246. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Table 247. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Table 248. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . 279
PS019924-0113 PR E L I M I NARY List of Tables
Z8 Encore! XP® F64xx Series
Product Specification
xx
Table 249. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . 279
Table 250. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Table 251. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Table 252. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . 280
Table 253. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . 280
Table 254. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Table 255. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Table 256. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . 281
Table 257. Port A–H GPIO Address Registers (PxADDR) . . . . . . . . . . . . . . . . . . . . 281
Table 258. Port A–H Control Registers (PxCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Table 259. Port A–H Input Data Registers (PxIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Table 260. Port A–H Output Data Register (PxOUT) . . . . . . . . . . . . . . . . . . . . . . . . . 282
Table 261. Watchdog Timer Control Register (WDTCTL) . . . . . . . . . . . . . . . . . . . . 282
Table 262. Watchdog Timer Reload Upper Byte Register (WDTU) . . . . . . . . . . . . . 282
Table 263. Watchdog Timer Reload High Byte Register (WDTH) . . . . . . . . . . . . . . 283
Table 264. Watchdog Timer Reload Low Byte Register (WDTL) . . . . . . . . . . . . . . . 283
Table 265. Flash Control Register (FCTL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Table 266. Flash Status Register (FSTAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Table 267. Page Select Register (FPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Table 268. Flash Frequency High Byte Register (FFREQH) . . . . . . . . . . . . . . . . . . . 285
Table 269. Flash Frequency Low Byte Register (FFREQL) . . . . . . . . . . . . . . . . . . . . 285
Table 270. Flash Sector Protect Register (FPROT) . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
Table 271. Z8 Encore! XP F64xx Series Ordering Matrix . . . . . . . . . . . . . . . . . . . . . 287
PS019924-0113 PRELIMI N A R Y Introduction
Z8 Encore! XP® F64xx Series
Product Specification
1
Introduction
Zilog’s Z8 Encore! XP F64xx Series MCU family of products are a line of Zilog micro-
controller products based upon the 8-bit eZ8 CPU. The Z8 Encore! XP F64xx Series adds
Flash memory to Zilog’s extensive line of 8-bit microcontrollers. The Flash in-circuit pro-
gramming capability allows for faster development time and program changes in the field.
The new eZ8 CPU is upward-compatible with existing Z8 instructions. The rich-periph-
eral set of the Z8 Encore! XP F64xx Series makes it suitable for a variety of applications
including motor control, security systems, home appliances, personal electronic devices,
and sensors.
Features
The features of Z8 Encore! XP F64xx Series include:
•
20 MHz eZ8 CPU
•
Up to 64 KB Flash with in-circuit programming capability
•
Up to 4 KB register RAM
•
12-channel, 10-bit Analog-to-Digital Converter (ADC)
•
Two full-duplex 9-bit UARTs with bus transceiver Driver Enable control
•
Inter-integrated circuit (I2C)
•
Serial Peripheral Interface (SPI)
•
Two Infrared Data Association (IrDA)-compliant infrared encoder/decoders
•
Up to four 16-bit timers with capture , compare and PWM capability
•
Watchdog Timer (WDT) with internal RC oscillator
•
Three-channel DMA
•
Up to 60 input/output (I/O) pins
•
24 interrupts with configurable priority
•
On-Chip Debugger
•
Voltage Brown-Out (VBO) Protection
•
Power-On Reset (POR)
•
Operating voltage of 3.0 V to 3.6 V with 5 V-tolerant inputs
•
0°C to +70°C, –40°C to +105°C, and –40°C to +125°C operating temperature ranges
PS019924-0113 PRELI M I N A R Y Part Selection Guide
Z8 Encore! XP® F64xx Series
Product Specification
2
Part Selection Guide
Table 1 identifies the basic features and package styles available for each device within the
Z8 Encore! XP product line.
Table 1. Z8 Encore! XP F64xx Series Part Selection Guide
Part
Number Flash
(KB) RAM
(KB) I/O
16-bit
Timers
with PWM ADC
Inputs UARTs
with IrDA I2C SPI
40-/
44-Pin
Package 64/68-Pin
Package 80-Pin
Package
Z8F1621 16 2 31 3 8 2 1 1 X
Z8F1622 16 2 46 4 12 2 1 1 X
Z8F2421 24 2 31 3 8 2 1 1 X
Z8F2422 24 2 46 4 12 2 1 1 X
Z8F3221 32 2 31 3 8 2 1 1 X
Z8F3222 32 2 46 4 12 2 1 1 X
Z8F4821 48 4 31 3 8 2 1 1 X
Z8F4822 48 4 46 4 12 2 1 1 X
Z8F4823 48 4 60 4 12 2 1 1 X
Z8F6421 64 4 31 3 8 2 1 1 X
Z8F6422 64 4 46 4 12 2 1 1 X
Z8F6423 64 4 60 4 12 2 1 1 X
Note: For die form sales, contact your local Zilog Sales Office.
PS019924-0113 PREL I M I N A R Y Block Diagram
Z8 Encore! XP® F64xx Series
Product Specification
3
Block Diagram
Figure 1 displays the architecture of the Z8 Encore! XP F64xx Series.
CPU and Peripheral Overview
The latest 8-bit eZ8 CPU meets the continuing demand for faster and more code-efficient
microcontrollers. The eZ8 CPU executes a superset of the original Z8 instruction set.
eZ8 CPU features include:
•
Direct register-to-register architecture allows each register to function as an accumula-
tor, improving execution time and decreasing the required program memory
Figure 1. Z8 Encore! XP F64xx Series Block Diagram
GPIO
IrDA
UARTs I
2
CTimers SPI ADC Flash
Controller
RAM
RAM
Controller
Flash
Interrupt
Controller
On-Chip
Debugger
eZ8
TM
CPU WDT with
RC Oscillator
POR/VBO
and Reset
Controller
XTAL/RC
Oscillator
Register Bus
Memory Busses
System
Clock
DMA
Memory
PS019924-0113 PREL I M I N A RY CPU and Peripheral Overview
Z8 Encore! XP® F64xx Series
Product Specification
4
•
Software stack allows much greater depth in subroutine calls and interrupts than hard-
ware stacks
•
Compatible with existing Z8 code
•
Expanded internal Register File allows access of up to 4 KB
•
New instructions improve execution efficiency for code developed using higher-level
programming languages, including C
•
Pipelined instruction fetch and execution
•
New instructions for improved performance including BIT, BSWAP, BTJ, CPC, LDC,
LDCI, LEA, MULT and SRL
•
New instructions support 12-bit linear addressing of the Register File
•
Up to 10 MIPS operation
•
C-Compiler friendly
•
2 to 9 clock cycles per instruction
For more information about the eZ8 CPU, refer to the eZ8 CPU Core User Manual
(UM0128), which is available for download on www.zilog.com.
General-Purpose Input/Output
The Z8 Encore! XP F64xx Series features seven 8-bit ports (ports A–G) and one 4-bit p ort
(Port H) for general-purpose input/output (GPIO). Each pin is individually prog rammable.
All ports (except B and H) support 5 V-tolerant inputs.
Flash Controller
The Flash Controller programs and erases the contents of Flash memory.
10-Bit Analog-to-Digital Converter
The Analog-to-Digital Converter converts an analog input signal to a 10-bit binary num-
ber. The ADC accepts inputs from up to 12 different analog input sources.
UARTs
Each UART is full-duplex and capable of handling asynchronous data transfers. The
UARTs support 8- and 9-bit data modes, selectable parity, and an efficient bus transceiver
Driver Enable signal for controlling a multitransceiver bus, such as RS-485.
PS019924-0113 PREL I M I N A RY CPU and Peripheral Overview
Z8 Encore! XP® F64xx Series
Product Specification
5
I2C
The I2C controller makes the Z8 Encore! XP F64xx Series compatible with the I2C proto-
col. The I2C controller consists of two bidirectional bus lines, a serial data (SDA) line and
a serial clock (SCL) line.
Serial Peripheral Interface
The serial peripheral interface allows the Z8 Encore! XP F64xx Series to exchange data
between other peripheral devices such as EEPROMs, A/D converters and ISDN devices.
The SPI is a full-duplex, synchronous, character-oriented channel that supports a four-wire
interface.
Timers
Up to four 16-bit reloadable timers can be used for timing/counting events or for motor
control operations. These timers provide a 16-bit programmable reload counter and oper-
ate in ONE-SHOT, CONTINUOUS, GATED, CAPTURE, COMPARE, CAPTURE AND
COMPARE and PWM modes. Only 3 timers (T imer 0– 2) are available in the 44-pin pack -
age.
Interrupt Controller
The Z8 Encore! XP F64xx Series products support up to 24 interrupts. These interrupts
consist of 12 internal an d 12 GPIO pins. The interrupt s have 3 levels of prog ra mmable
interrupt priority.
Reset Controller
The Z8 Encore! XP F64xx Series can be reset using the RESET pin, Power-On Reset,
Watchdog Timer, STOP Mode exit, or Voltage Brown-Out (VBO) warning signal.
On-Chip Debugger
The Z8 Encore! XP F64xx Series features an integrated On-Chip Debugger. The OCD
provides a rich set of debugging capabilities, such as reading and writing registers, pro-
gramming the Flash, setting breakpoints and executing code. A single-pin interface pro-
vides communication to the OCD.
PS019924-0113 PREL I M I N A RY CPU and Peripheral Overview
Z8 Encore! XP® F64xx Series
Product Specification
6
DMA Controller
The Z8 Encore! XP F64xx Series feature three channels of DMA. Two of the channels are
for register RAM to and from I/O operations. The third channel automatically controls the
transfer of data from the ADC to the memory.
PS019924-0113 PRELIMINA RY Signal and Pin Descript ion s
Z8 Encore! XP® F64xx Series
Product Specification
7
Signal and Pin Descriptions
The Z8 Encore! XP F64xx Series product are available in a variety of packages styles and
pin configurations. This chapter describes the signals and available pin configurations for
each of the package styles. For information about physical package specifications, see the
Packaging chapter on page 286.
Available Packages
Table 2 identifies the package styles that are available for each device within the Z8
Encore! XP F64xx Series product line.
Table 2. Z8 Encore! XP F64xx Series Package Options
Part Number 40-Pin
PDIP 44-Pin
LQFP 44-Pin
PLCC 64-Pin
LQFP 68-Pin
PLCC 80-Pin
QFP
Z8F1621 X X X
Z8F1622 X X
Z8F2421 X X X
Z8F2422 X X
Z8F3221 X X X
Z8F3222 X X
Z8F4821 X X X
Z8F4822 X X
Z8F4823 X
Z8F6421 X X X
Z8F6422 X X
Z8F6423 X
PS019924-0113 PREL I M I N A RY Pin Configurations
Z8 Encore! XP® F64xx Series
Product Specification
8
Pin Configurations
Figures 2 through 7 display the pin configurations for all of the packages available in the
Z8 Encore! XP F64xx Series. For signal descriptions, see Table 3 on page 14.
Timer 3 and T2OUT are not supported in the 40-pin PDIP package.
Figure 2. Z8 Encore! XP F64xx Series in 40-Pin Dual Inline Package (PDIP)
PD5/TXD1
PC4/MOSI
PA4/RXD0
PA5/TXD0
PA6/SCL
PA7/SDA
PD6/CTS1
PC3/SCK
VSS
PD4/RXD1
PD3/DE1
PC5/MISO
PA3/CTS0
PA2/DE0
PA1/T0OUT
PA0/T0IN
PC2/SS
140
VDD
RESET
PC6/T2IN
DBG
PC1/T1OUT
VSS
PD1
PD0 PC0/T1INXOUT AVSSXIN VREFAVDD PB2/ANA2
PB3/ANA3
PB7/ANA7
PB0/ANA0
PB1/ANA1
PB4/ANA4 20 21 PB6/ANA6PB5/ANA5
5
10
15
35
30
25
VDD
Note:
PS019924-0113 PREL I M I N A RY Pin Configurations
Z8 Encore! XP® F64xx Series
Product Specification
9
Timer 3 is not available in the 44-pin PLCC package.
Figure 3. Z8 Encore! XP F64xx Series in 44-Pin Plastic Leaded Chip Carrier (PLCC)
PA7/SDA
PD6/CTS1
PC3/SCK
VSS
VDD
VSS
PC7/T2OUT
PC6/T2IN
DBG
PA0/T0IN
PD2
PC2/SS
RESET
VDD
VSS
VDD
PD1
PD0
739
PC1/T1OUT
XOUT PC0/T1IN
XIN
PA1/T0OUT
PA2/DE0
PA3/CTS0
PC5/MISO
PD3/DE1
PD4/RXD1
PD5/TXD1
PC4/MOSI
PA4/RXD0
PA5/TXD0
PA6/SCL
AVDD
PB6/ANA6
PB5/ANA5
PB0/ANA0
PB1/ANA1
PB4/ANA4
PB7/ANA7
VREF
PB2/ANA2
PB3/ANA3
AVSS
6401
17 29
2818
12
23
34
Note:
PS019924-0113 PREL I M I N A RY Pin Configurations
Z8 Encore! XP® F64xx Series
Product Specification
10
Timer 3 is not available in the 44-pin LQFP package.
Figure 4. Z8 Encore! XP F64xx Series in 44-Pin Low-Profile Quad Flat Package (LQFP)
PA7/SDA
PD6/CTS1
PC3/SCK
VSS
VDD
VSS
PC7/T2OUT
PC6/T2IN
DBG
PA0/T0IN
PD2
PC2/SS
RESET
VDD
VSS
VDD
PD1
PD0
34 22
PC1/T1OUT
XOUT PC0/T1IN
XIN
PA1/T0OUT
PA2/DE0
PA3/CTS0
PC5/MISO
PD3/DE1
PD4/RXD1
PD5/TXD1
PC4/MOSI
PA4/RXD0
PA5/TXD0
PA6/SCL
AVDD
PB6/ANA6
PB5/ANA5
PB0/ANA0
PB1/ANA1
PB4/ANA4
PB7/ANA7
VREF
PB2/ANA2
PB3/ANA3
AVSS
33 23
44 12
111
28
39 17
6
Note:
PS019924-0113 PREL I M I N A RY Pin Configurations
Z8 Encore! XP® F64xx Series
Product Specification
11
Figure 5. Z8 Encore! XP F64xx Series in 64-Pin Low-Profile Quad Flat Package (LQFP)
PA7/SDA
PD6/CTS1
PC3/SCK
PD7/RCOUT
VSS
PE5
PE6
PE7
VDD
PA0/T0IN
PD2
PC2/SS
RESET
VDD
PE4
PE3
VSS
PE2
49 32
PG3PE1 VDD
PE0
PA1/T0OUT
PA2/DE0
PA3/CTS0
VSS
VDD
PF7
PC5/MISO
PD4/RXD1
PD5/TXD1
PC4/MOSI
VSS
PB1/ANA1
PB0/ANA0
AVDD
PH0/ANA8
PH1/ANA9
PB4/ANA4
PB7/ANA7
PB6/ANA6
PB5/ANA5
PB3/ANA3
48
1
PC7/T2OUT
PC6/T2IN
DBG
PC1/T1OUT
PC0/T1IN
17
PB2/ANA2
VREF
PH3/ANA11
PH2/ANA10
AVSS
16
VSS
PD1/T3OUT
PD0/T3IN
XOUT
XIN 64
PD3/DE1
VDD
PA4/RXD0
PA5/TXD0
PA6/SCL
33
VSS
56
40
25
8
PS019924-0113 PREL I M I N A RY Pin Configurations
Z8 Encore! XP® F64xx Series
Product Specification
12
Figure 6. Z8 Encore! XP F64xx Series in 68-Pin Plastic Leaded Chip Carrier (PLCC)
PA7/SDA
PD6/CTS1
PC3/SCK
PD7/RCOUT
VSS
PE5
PE6
PE7
VDD
PA0/T0IN
PD2
PC2/SS
RESET
VDD
PE4
PE3
VSS
PE2
10 60
PG3PE1 VDD
PE0
PA1/T0OUT
PA2/DE0
PA3/CTS0
VSS
VDD
PF7
PC5/MISO
PD4/RXD1
PD5/TXD1
PC4/MOSI
VSS
PB1/ANA1
PB0/ANA0
AVDD
PH0/ANA8
PB4/ANA4
PB7/ANA7
PB6/ANA6
PB5/ANA5
PB3/ANA3
9
27
PC7/T2OUT
PC6/T2IN
DBG
PC1/T1OUT
PC0/T1IN
PB2/ANA2
VREF
PH3/ANA11
PH2/ANA10
AVSS
VSS
VDD
PD1/T3OUT
PD0/T3IN
XOUT
PD3/DE1
VSS
PA4/RXD0
PA5/TXD0
VDD
PH1/ANA9
PA6/SCL
61
VSS
44
AVSS
43
XIN 26
1
VDD
18
35
52
PS019924-0113 PREL I M I N A RY Pin Configurations
Z8 Encore! XP® F64xx Series
Product Specification
13
Figure 7. Z8 Encore! XP F64xx Series in 80-Pin Quad Flat Package (QFP)
PA7/SDA
PD6/CTS1
PC3/SCK
PD7/RCOUT
PG0
VSS
PG1
PG2
PE5
PA0/T0IN
PD2
PC2/SS
PF6
RESET
VDD
PF5
PF4
PF3
164
PE6PE4 PE7
PE3
PA1/T0OUT
PA2/DE0
PA3/CTS0
VSS
VDD
PF7
PC5/MISO
PD4/RXD1
PD5/TXD1
PC4/MOSI
VSS
PB1/ANA1
PB0/ANA0
AVDD
PH0/ANA8
PB4/ANA4
PB7/ANA7
PB6/ANA6
PB5/ANA5
PB3/ANA3
80
25
VDD
PG3
PG4
PG5
PG6
PB2/ANA2
VREF
PH3/ANA11
PH2/ANA10
AVSS
VSS
PE2
PE1
PE0
VSS
PD3/DE1
VDD
PA4/RXD0
PA5/TXD0
PA6/SCL
VSS
PH1/ANA9
65
VDD
40
PF2 PG7
PF1 PC7/T2OUT
PC6/T2IN
DBG
PC1/T1OUT
PC0/T1IN
PF0
VDD
PD1/T3OUT
PD0/T3IN
XOUT VSS
41
XIN 24
5
10
15
20
30 35
45
50
55
60
70
75
PS019924-0113 PREL I M I N A R Y Signal Descriptions
Z8 Encore! XP® F64xx Series
Product Specification
14
Signal Descriptions
Table 3 lists the Z8 Encore! XP signals. To determine the available signals for a specific
package style, see the Pin Configurations section on page 8.
Table 3. Signal Descriptions
Signal
Mnemonic I/O Description
General-Purpose I/O Ports A–H
PA[7:0] I/O Port A[7:0]. These pins are used for gener al-purpose I/O a nd support 5 V -to ler-
ant inputs.
PB[7:0] I/O Port B[7:0]. These pins are used for general-purpose I/O.
PC[7:0] I/O Port C[7:0]. These pins are used for g eneral-purpose I/O. These pins are used
for general-purpose I/O and support 5 V-tolerant inputs
PD[7:0] I/O Port D[7:0]. These pins are used for g eneral-purpose I/O. These pins are used
for general-purpose I/O and support 5 V-tolerant inputs
PE[7:0] I/O Port E[7:0]. These pins are used for general- purpose I/O. These pins are used
for general-purpose I/O and support 5 V-tolerant inputs.
PF[7:0] I /O Port F[7:0]. These pins are used for general- purpose I/O. These pin s are used
for general-purpose I/O and support 5 V-tolerant inputs.
PG[7:0] I/O Port G[7:0]. These pins are used for general-purpose I/O. These pins are used
for general-purpose I/O and support 5 V-tolerant inputs.
PH[3:0] I/O Port H[3:0]. These pins are used for general-purpose I/O.
I2C Controller
SCL O Serial Clock. This is the output clock for the I2C. This pin is multiplexed with a
general-purpose I/O pin. When the general-purpose I/O pin is configured for
alternate function to enable the SCL function, this pin is open-drain.
SDA I/O Serial Data. This open-drain pin transfers data between the I2C and a slave.
This pin is multiplexed with a general-purpose I/O pin. When the general-pur-
pose I/O pin is configured for alternate function to enable the SDA function,
this pin is open-drain.
SPI Controller
SS I/O Slave Select. This signal can be an output or an input. If the Z8 Encore! XP
F64xx Series is the SPI master, this pin may be configured as the Slave Select
output. If the Z8 Encore! XP F64xx Series is the SPI slave, this pin is the input
slave select. It is multiplexed with a general-purpose I/O pin.
SCK I/O SPI Serial Clock. The SPI master supplies this pin. If the Z8 Encore! XP F64xx
Series is the SPI master, this pin is an output. If the Z8 Encore! XP F64xx
Series is the SPI slave, this pin is an input. It is multiplexed with a general-pur-
pose I/O pin.
PS019924-0113 PREL I M I N A R Y Signal Descriptions
Z8 Encore! XP® F64xx Series
Product Specification
15
SPI Controller (continued)
MOSI I/O Master-Out/Slave-In. This signal is the data output from the SPI master device
and the dat a inpu t to the SPI slave devi ce. It is multiplexed with a general-pur-
pose I/O pin.
MISO I/O Master-In/Slave-Out. This pin is the data input to the SPI master device and
the data output from the SPI slave device. It is multiplexed with a
general-purpose I/O pin.
UART Controllers
TXD0/TXD1 O Transmit Data. These signals are the transmit outputs from the UARTs. The
TxD signals are multiplexed with general-purpose I/O pins.
RXD0/RXD1 I Receive Data. These signa ls are the receiver input s for the UAR Ts and IrDAs.
The RxD signals are multiplexed with general-purpose I/O pins.
CTS0/CTS1 I Clear To Send. These signals are control inputs for the UARTs. The CTS sig-
nals are multiplexed with general-purpose I/O pins.
DE0/DE1 O Driver Enable. This signal allows automatic control of external RS-485 drivers.
This signal is approximately the in verse of the Transmit Empty (TXE) bit in the
UART Status 0 Register. The DE signal may be used to ensure an external
RS-485 driver is enabled when data is transmitted by the UART.
Timers
T0OUT/
T1OUT/
T2OUT/
T3OUT
O Timer Output 0-3. These signals are output pins from the timers. The timer
output signals are multiplexed with general-purpose I/O pins. T3OUT is not
available in 44-pin package devices.
T0IN/T1IN/
T2IN/T3IN I Timer Input 0-3. These signals are used as the capture, gating and counter
inputs. The timer input signals are multiplexed with general-purpose I/O pins.
T3IN is not available in 44-pin package devices.
Analog
ANA[11:0] I Analog Input. These signals are input s to the ADC. The ADC analog input s are
multiplexed with general-purpose I/O pins.
V
REF
I Analog-to-Digital converter reference voltage input. The V
REF
pin must be left
unconnected (or capacitively coupled to analog ground) if the inter nal voltage
reference is selected as the ADC reference voltage.
Table 3. Signal Descriptions (Continued)
Signal
Mnemonic I/O Description
PS019924-0113 PREL I M I N A R Y Signal Descriptions
Z8 Encore! XP® F64xx Series
Product Specification
16
Oscillators
X
IN
I External Crystal Input. This is the input pin to the crystal oscillator. A crystal
can be connected between it and the X
OUT
pin to form the oscillator. This sig-
nal is usable with external RC networks and an external clock driver.
X
OUT
O External Crystal Output. This pin is the output of the crystal oscillator. A crystal
can be connected between it and the X
IN
pin to form the oscillator. When the
system clock is referred to in this manual, it refers to the frequency of the sig-
nal at this pin. This pin must be left unconnected when not using a crystal.
RCOUT O RC Oscillator Output. This signal is the output of the RC oscillator. It is multi-
plexed with a general-purpose I/O pin. This signal must be left unconnected
when not using a crystal.
On-Chip Debugger
DBG I/O Debug. This pin is the control and data input and output to and from the On-
Chip Debugger. This pin is open-drain.
Caution: For operation of the On-Chip Debugger, all power pins (VDD and
AVDD) must be supplied with power and all ground pins (VSS and AVSS) must
be properly grounded. The DBG pin is open-drain and must have an external
pull-up resistor to ensure proper operation.
Reset
RESET I RESET. Generates a Reset when asserted (driven Low).
Power Supply
V
DD
I Power Supply.
AV
DD
I Analog Power Supply.
V
SS
I Ground.
AV
SS
I Analog Ground.
Table 3. Signal Descriptions (Continued)
Signal
Mnemonic I/O Description
PS019924-0113 PREL I M I N A R Y Pin Characteristics
Z8 Encore! XP® F64xx Series
Product Specification
17
Pin Characteristics
Table 4 lists the characteristic s for each pin available on the Z8 Encore! XP F64xx Series
products and the data is sorted alphabetically by the pin symb ol mn emonic.
Table 4. Pin Characteristics of the Z8 Encore! XP F64xx Series
Symbol
Mnemonic Direction Reset
Direction
Active Low
or
Active High Tri-State
Output
Internal
Pull-Up or
Pull-Down
Schmitt-
Trigger
Input Open-Drain
Output
AV
SS
N/A N/A N/A N/A No No N/A
AV
DD
N/A N/A N/A N/A No No N/A
DBG I/O I N/A Yes No Yes Yes
V
SS
N/A N/A N/A N/A No No N/A
PA[7:0] I/O I N/A Yes No Yes Yes,
programmable
PB[7:0] I/O I N/A Yes No Yes Yes,
programmable
PC[7:0] I/O I N/A Yes No Yes Yes,
programmable
PD[7:0] I/O I N/A Yes No Yes Yes,
programmable
PE7:0] I/O I N/A Yes No Yes Yes,
programmable
PF[7:0] I/O I N/A Yes No Yes Yes,
programmable
PG[7:0] I/O I N/A Yes No Yes Yes,
programmable
PH[3:0] I/O I N/A Yes No Yes Yes,
programmable
RESET I I Low N/A Pull-up Yes N/A
V
DD
N/A N/A N/A N/A No No N/A
X
IN
I I N/A N/A No No N/A
X
OUT
O O N/A Yes, in
STOP Mode No No No
Note: x represents integer 0, 1,... to indicate multiple pins with symbol mnemonics that differ only by the integer.
PS019924-0113 PR E L I M I NARY Address Space
Z8 Encore! XP® F64xx Series
Product Specification
18
Address Space
The eZ8 CPU can access three distinct address spaces:
•
The Register File contains addresses for the general-purpose registers and the eZ8
CPU, peripheral and general-pu rpose I/O port control registers
•
The program memory contains addresses for all memory locations having executable
code and/or data
•
The Data Memory consists of the addresses for all memory locations that hold only data
These three address spaces are covered briefly in the following sections. For more infor-
mation about the eZ8 CPU and its address space, refer to the eZ8 CPU Core User Manual
(UM0128), which is available for download on www.zilog.com.
Register File
The Register File address space in the Z8 Encore! XP F64xx Series is 4 KB (4096 bytes).
The Register File is composed of two sections: control registers and general-purpose reg-
isters. When instructions are executed, registers are read from when defined as sources
and written to when defined as destinations. The architecture of the eZ8 CPU allows all
general-purpose registers to function as accumu lators, address pointers, index registers,
stack areas, or scratch pad memory.
The upper 256 bytes of the 4 KB Register File address space are reserved for control of the
eZ8 CPU, the on-chip peripherals, and the I/O ports. These registers are located at
addresses from F00H to FFFH. Some of the addresses within the 256-byte control register
section are reserved (unavailable). Reading from an reserved Register File addresses
returns an undefined value. Writing to reserved Register File addresses is not recom-
mended and can produce unpredictable results.
The on-chip RAM always begins at address 000H in the Register File address space. The
Z8 Encore! XP F64xx Series provide 2 KB to 4 KB of on-chip RAM depending upon the
device. Reading from Register File addresses outside the available RAM addresses (and
not within the control register address space) returns an undefined value. Writing to these
Register File addresses produces no effect. To determine the amount of RAM available for
the specific Z8 Encore! XP F64xx Series device, see the Part Selection Guide section on
page 2.
PS019924-0113 PR E L IMINARY Program Memory
Z8 Encore! XP® F64xx Series
Product Specification
19
Program Memory
The eZ8 CPU supports 64 KB of program memory address space. The Z8 Encore! XP
F64xx Series contains 16 KB to 64 KB of on-chip Flash in the program memory address
space, depending upon the device. Reading from program memory addresses outside the
available Flash memory addresses returns FFH. Writing to these unimplemented program
memory addresses produces no effect. Table 5 describes the program memory maps for
the Z8 Encore! XP F64xx Series products.
Table 5. Z8 Encore! XP F64xx Series Program Memory Maps
Program Memory Address (Hex) Function
Z8F162x Products
0000-0001 Option Bits
0002-0003 Reset Vector
0004-0005 WDT Interrupt Vector
0006-0007 Illegal Instruction Trap
0008-0037 Interrupt Vectors*
0038-3FFF Program Memory
Z8F242x Products
0000-0001 Option Bits
0002-0003 Reset Vector
0004-0005 WDT Interrupt Vector
0006-0007 Illegal Instruction Trap
0008-0037 Interrupt Vectors*
0038-5FFF Program Memory
Z8F322x Products
0000-0001 Option Bits
0002-0003 Reset Vector
0004-0005 WDT Interrupt Vector
0006-0007 Illegal Instruction Trap
0008-0037 Interrupt Vectors*
0038-7FFF Program Memory
Z8F482x Products
0000-0001 Option Bits
0002-0003 Reset Vector
0004-0005 WDT Interrupt Vector
Note: *See Table 23 on page 48 for a list of the interrupt vectors.
PS019924-0113 PR E L IMINARY Data Memory
Z8 Encore! XP® F64xx Series
Product Specification
20
Data Memory
The Z8 Encore! XP F64xx Series does not use the eZ8 CPU’s 64 KB data memory address
space.
Information Area
Table 6 describes the Z8 Encore! XP F64xx Series’ Information Area. This 512-byte
Information Area is accessed by setting bit 7 of the Page Select Register to 1. When access
is enabled, the Information Area is mapped into program memory and o verlays the 512
bytes at addresses FE00H to FFFFH. When the Information Area access is enabled, execu-
tion of the LDC and LDCI instructions from these program memory addresses return the
Information Area data rather than the program memory data. Reads of these addresses
through the On-Chip Debugger also returns the Information Area data. Execution of code
from these addresses continues to correctly use program memory. Access to the Informa-
tion Area is read-only.
0006-0007 Illegal Instruction Trap
0008-0037 Interrupt Vectors*
0038-BFFF Program Memory
Z8F642x Products
0000-0001 Option Bits
0002-0003 Reset Vector
0004-0005 WDT Interrupt Vector
0006-0007 Illegal Instruction Trap
0008-0037 Interrupt Vectors*
0038-FFFF Program Memory
Table 5. Z8 Encore! XP F64xx Series Program Memory Maps (Continued)
Program Memory Address (Hex) Function
Note: *See Table 23 on page 48 for a list of the interrupt vectors.
PS019924-0113 PR E L I M I NARY Information Area
Z8 Encore! XP® F64xx Series
Product Specification
21
Table 6. Z8 Encore! XP F64xx Series Information Area Map
Program Memory
Address (Hex) Function
FE00H–FE3FH Reserved
FE40H–FE53H Part Number
20-character ASCII alphanumeric code
Left-justified and filled with zeros (ASCII Null character)
FE54H–FFFFH Reserved
PS019924-0113 PR E L I M I NARY Register File Address Map
Z8 Encore! XP® F64xx Series
Product Specification
22
Register File Address Map
Table 7 provides the address map for the Register File of the Z8 Encore! XP F64xx Series
products. Not all devices and package styles in the Z8 Encore! XP F64xx Series support
T imer 3 and all of the GPIO ports. Consider registers for unimplemented peripherals to be
reserved.
Table 7. Z8 Encore! XP F64xx Series Register File Address Map
Address (Hex) Register Description Mnemonic Reset (Hex) Page
General-Purpose RAM
000–EFF General-Purpose Register File RAM — XX
Timer 0
F00 Timer 0 High Byte T0H 00 72
F01 Timer 0 Low Byte T0L 01 72
F02 Timer 0 Reload High Byte T0RH FF 74
F03 Timer 0 Reload Low Byte T0RL FF 74
F04 Timer 0 PWM High Byte T0PWMH 00 75
F05 Timer 0 PWM Low Byte T0PWML 00 75
F06 Timer 0 Control 0 T0CTL0 00 76
F07 Timer 0 Control 1 T0CTL1 00 77
Timer 1
F08 Timer 1 High Byte T1H 00 72
F09 Timer 1 Low Byte T1L 01 72
F0A Timer 1 Reload High Byte T1RH FF 74
F0B Timer 1 Reload Low Byte T1RL FF 74
F0C Timer 1 PWM High Byte T1PWMH 00 75
F0D Timer 1 PWM Low Byte T1PWML 00 75
F0E Timer 1 Control 0 T1CTL0 00 76
F0F Timer 1 Control 1 T1CTL1 00 77
Timer 2
F10 Timer 2 High Byte T2H 00 72
F11 Timer 2 Low Byte T2L 01 72
F12 Timer 2 Reload High Byte T2RH FF 74
F13 Timer 2 Reload Low Byte T2RL FF 74
Note: XX = Undefined.
PS019924-0113 PR E L I M I NARY Register File Address Map
Z8 Encore! XP® F64xx Series
Product Specification
23
Timer 2 (continued)
F14 Timer 2 PWM High Byte T2PWMH 00 75
F15 Timer 2 PWM Low Byte T2PWML 00 75
F16 Timer 2 Control 0 T2CTL0 00 76
F17 Timer 2 Control 1 T2CTL1 00 77
Timer 3 (Unavailable in the 44-Pin Package)
F18 Timer 3 High Byte T3H 00 72
F19 Timer 3 Low Byte T3L 01 72
F1A Timer 3 Reload High Byte T3RH FF 74
F1B Timer 3 Reload Low Byte T3RL FF 74
F1C Timer 3 PWM High Byte T3PWMH 00 75
F1D Timer 3 PWM Low Byte T3PWML 00 75
F1E Timer 3 Control 0 T3CTL0 00 76
F1F Timer 3 Control 1 T3CTL1 00 77
20–3F Reserved — XX
UART 0
F40 UART0 Transmit Data U0TXD XX 98
UART0 Receive Data U0RXD XX 99
F41 UART0 Status 0 U0STAT0 0000011Xb 100
F42 UART0 Control 0 U0CTL0 00 102
F43 UART0 Control 1 U0CTL1 00 102
F44 UART0 Status 1 U0STAT1 00 100
F45 UART0 Address Compare Register U0ADDR 00 105
F46 UART0 Baud Rate High Byte U0BRH FF 105
F47 UART0 Baud Rate Low Byte U0BRL FF 105
UART 1
F48 UART1 Transmit Data U1TXD XX 98
UART1 Receive Data U1RXD XX 99
F49 UART1 Status 0 U1STAT0 0000011Xb 100
F4A UART1 Control 0 U1CTL0 00 102
F4B UART1 Control 1 U1CTL1 00 102
F4C UART1 Status 1 U1STAT1 0 0 100
Table 7. Z8 Encore! XP F64xx Series Register File Address Map (Continued)
Address (Hex) Register Description Mnemonic Reset (Hex) Page
Note: XX = Undefined.
PS019924-0113 PR E L I M I NARY Register File Address Map
Z8 Encore! XP® F64xx Series
Product Specification
24
UART 1 (continued)
F4D UART1 Address Compare Register U1ADDR 00 105
F4E UART1 Baud Rate High Byte U1BRH FF 105
F4F UART1 Baud Rate Low Byte U1BRL FF 105
I2C
F50 I2C Data I2CDATA 00 141
F51 I2C Status I2CSTAT 80 142
F52 I2C Control I2CCTL 00 144
F53 I2C Baud Rate High Byte I2CBRH FF 145
F54 I2C Baud Rate Low Byte I2CBRL FF 145
F55 I2C Diagnostic State I2CDST C0 147
F56 I2C Diagnostic Control I2CDIAG 00 149
F57–F5F Reserved — XX
Serial Peripheral Interface (SPI)
F60 SPI Data SPIDATA XX 121
F61 SPI Control SPICTL 00 122
F62 SPI Status SPISTAT 01 123
F63 SPI Mode SPIMODE 00 125
F64 SPI Diagnostic State SPIDST 00 126
F65 Reserved — XX
F66 SPI Baud Rate High Byte SPIBRH FF 126
F67 SPI Baud Rate Low Byte SPIBRL FF 126
F68–F6F Reserved — XX
Analog-to-Digital Converter
F70 ADC Control ADCCTL 20 165
F71 Reserved — XX
F72 ADC Data High Byte ADCD_H XX 167
F73 ADC Data Low Bits ADCD_L XX 168
F74–FAF Reserved — XX
DMA 0
FB0 DMA0 Control DMA0CTL 00 153
FB1 DMA0 I/O Address DMA0IO XX 154
Table 7. Z8 Encore! XP F64xx Series Register File Address Map (Continued)
Address (Hex) Register Description Mnemonic Reset (Hex) Page
Note: XX = Undefined.
PS019924-0113 PR E L I M I NARY Register File Address Map
Z8 Encore! XP® F64xx Series
Product Specification
25
DMA 0 (continued)
FB2 DMA0 End/Start Address High Nibble DMA0H XX 155
FB3 DMA0 Start Address Low Byte DMA0START XX 156
FB4 DMA0 End Address Low Byte DMA0END XX 156
DMA 1
FB8 DMA1 Control DMA1CTL 00 153
FB9 DMA1 I/O Address DMA1IO XX 154
FBA DMA1 End/Start Addre ss High Nibble DMA1H XX 155
FBB DMA1 Start Address Low Byte DMA1START XX 156
FBC DMA1 End Address Low Byte DMA1END XX 156
DMA ADC
FBD DMA_ADC Address DMAA_ADDR XX 157
FBE DMA_ADC Control DMAACTL 00 158
FBF DMA_ADC Status DMAASTAT 00 159
Interrupt Controller
FC0 Interrupt Request 0 IRQ0 00 51
FC1 IRQ0 Enable High Bit IRQ0ENH 00 55
FC2 IRQ0 Enable Low Bit IRQ0ENL 00 55
FC3 Interrupt Request 1 IRQ1 00 53
FC4 IRQ1 Enable High Bit IRQ1ENH 00 56
FC5 IRQ1 Enable Low Bit IRQ1ENL 00 56
FC6 Interrupt Request 2 IRQ2 00 54
FC7 IRQ2 Enable High Bit IRQ2ENH 00 58
FC8 IRQ2 Enable Low Bit IRQ2ENL 00 58
FC9–FCC Reserved — XX
FCD Interrupt Edge Select IRQES 00 60
FCE Interrupt Port Select IRQPS 00 60
FCF Interrupt Control IRQCTL 00 61
GPIO Port A
FD0 Port A Address PAADDR 00 40
FD1 Port A Control PACTL 00 41
FD2 Port A Input Data PAIN XX 46
Table 7. Z8 Encore! XP F64xx Series Register File Address Map (Continued)
Address (Hex) Register Description Mnemonic Reset (Hex) Page
Note: XX = Undefined.
PS019924-0113 PR E L I M I NARY Register File Address Map
Z8 Encore! XP® F64xx Series
Product Specification
26
GPIO Port A (continued)
FD3 Port A Output Data PAOUT 00 46
GPIO Port B
FD4 Port B Address PBADDR 00 40
FD5 Port B Control PBCTL 00 41
FD6 Port B Input Data PBIN XX 46
FD7 Port B Output Data PBOUT 00 46
GPIO Port C
FD8 Port C Address PCADDR 00 40
FD9 Port C Control PCCTL 00 41
FDA Port C Input Data PCIN XX 46
FDB Port C Output Data PCOUT 00 46
GPIO Port D
FDC Port D Address PDADDR 00 40
FDD Port D Control PDCTL 00 41
FDE Port D Input Data PDIN XX 46
FDF Port D Output Data PDOUT 00 46
GPIO Port E
FE0 Port E Address PEADDR 00 40
FE1 Port E Control PECTL 00 41
FE2 Port E Input Data PEIN XX 46
FE3 Port E Output Data PEOUT 00 46
GPIO Port F
FE4 Port F Address PFADDR 00 40
FE5 Port F Control PFCTL 00 41
FE6 Port F Input Dat a PFIN XX 46
FE7 Port F Output Data PF OUT 00 46
GPIO Port G
FE8 Port G Address PGADDR 00 40
FE9 Port G Control PGCTL 00 41
FEA Port G Input Data PGIN XX 46
FEB Port G Output Data PGOUT 00 46
Table 7. Z8 Encore! XP F64xx Series Register File Address Map (Continued)
Address (Hex) Register Description Mnemonic Reset (Hex) Page
Note: XX = Undefined.
PS019924-0113 PR E L I M I NARY Register File Address Map
Z8 Encore! XP® F64xx Series
Product Specification
27
GPIO Port H
FEC Port H Address PHADDR 00 40
FED Port H Control PHCTL 00 41
FEE Port H Input Data PHIN XX 46
FEF Port H Output Data PHOUT 00 46
Watchdog Timer
FF0 Watchdog Timer Control WDTCTL XXX00000b 83
FF1 Watchdog Timer Reload Upper Byte WDTU FF 85
FF2 Watchdog Timer Reload High Byte WDTH FF 85
FF3 Watchdog Timer Reload Low Byte WDTL FF 85
FF4–FF7 Reserved — XX
Flash Memory Controller
FF8 Flash Control FCTL 00 175
FF8 Flash Status FSTAT 00 177
FF9 Page Select FPS 00 177
FF9 (if
enabled) Flash Sector Protect FPROT 00 178
FFA Flash Programming Frequency High Byte FFREQH 00 179
FFB Flash Programming Frequency Low Byte FFREQL 00 179
eZ8 CPU
FFC Flags — XX Refer to the
eZ8 CPU
Core User
Manual
(UM0128)
FFD Register Pointer RP XX
FFE Stack Pointer High Byte SPH XX
FFF Stack Pointer Low Byte SPL XX
Table 7. Z8 Encore! XP F64xx Series Register File Address Map (Continued)
Address (Hex) Register Description Mnemonic Reset (Hex) Page
Note: XX = Undefined.
PS019924-0113 PR E L I M I NARY Reset and Stop Mode Recovery
Z8 Encore! XP® F64xx Series
Product Specification
28
Reset and Stop Mode Recovery
The Reset Controller within the Z8 Encore! XP F64xx Series controls Reset and Stop
Mode Recovery operation. In typical operation, the following events cause a Reset to
occur:
•
Power-On Reset
•
Voltage Brown-Out
•
Watchdog Timer time-out (when configured via the WDT_RES option bit to initiate a
Reset)
•
External RESET pin assertion
•
On-Chip Debugger initiated Reset (OCDCTL[0] set to 1)
When the Z8 Encore! XP F64xx Series devices are in STOP Mode, a Stop Mode Recovery
is initiated by either of the following events:
•
Watchdog Timer time-out
•
GPIO port input pin transition on an enabled Stop Mode Recovery source
•
DBG pin driven Low
Reset Types
The Z8 Encore! XP F64xx Series provides two different types of reset operation (system
reset and Stop Mode Recovery). The type of Reset is a function of both the current operat-
ing mode of the Z8 Encore! XP F64xx Series devices and the source of the Reset. Table 8
lists the types of Reset and their operating characteristics.
Table 8. Reset and Stop Mode Recovery Characteristics and Latency
Reset Type
Reset Characte ristics and Lat e nc y
Control Registers eZ8 CPU Reset Latency (Delay)
System reset Reset (as applicable) Reset 66 WDT Oscillator cycles + 16 System Clock cycles
Stop Mode
Recovery Unaffected, except
WDT_CTL Register Reset 66 WDT Oscillator cycles + 16 System Clock cycles
PS019924-0113 PREL I M I N A RY Reset Sources
Z8 Encore! XP® F64xx Series
Product Specification
29
System Reset
During a system reset, the Z8 Encore! XP F64xx Series devices are held in Reset for 66
cycles of the Watchdog T imer oscillator followed by 16 cycles of the system clock. At the
beginning of Reset, all GPIO pins are configured as inputs.
During Reset, the eZ8 CPU and on-chip peripherals are idle; however, the on-chip crystal
oscillator and Watchdog Timer oscillator continue to run. The system clock begins operat-
ing following the Watchdog Timer oscillator cycle count. The eZ8 CPU and on-chip
peripherals remain idle through the 16 cycles of the system clock.
Upon Reset, control registers within the Register File that have a defined Reset value are
loaded with their reset values. Other control registers (including the Sta ck Pointer, Regis-
ter Pointer, and Flags) and general-purpose RAM are undefined following Reset. The eZ8
CPU fetches the Reset vector at program memory addresses 0002H and 0003H and loads
that value into the Program Counter. Program execution begins at the Reset vector
address.
Reset Sources
Table 9 lists the reset sources as a function of the operating mode. The text following pro-
vides more detailed information about the individual Reset sources . A Power-On Reset/
Voltage Brown-Out event always takes priority over all other possible reset sources to
ensure a full system reset occurs.
Table 9. Reset Sources and Resulting Reset Type
Operating Mode Reset Source Reset Type
NORMAL or HALT
modes Power-On Reset/Voltage Brown-
Out system reset
Watchdog Timer time-out
when configured for Reset system reset
RESET pin assertion system reset
On-Chip Debugger initiated Reset
(OCDCTL[0] set to 1) system reset except the On-Chip Debugger is
unaffected by the reset
STOP Mode Power-On Reset/Voltage Brown-
Out system reset
RESET pin assertion system reset
DBG pin driven Low system reset
PS019924-0113 PREL I M I N A RY Reset Sources
Z8 Encore! XP® F64xx Series
Product Specification
30
Power-On Reset
Each device in the Z8 Encore! XP F64xx Series contains an internal Power-On Re set cir-
cuit. The POR circuit monitors the supply voltage and holds the device in the Reset state
until the supply voltage reaches a safe operating level. After the supply voltage exceeds
the POR voltage threshold (VPOR), the POR Counter is enabled and counts 66 cycles of
the Watchdog Timer oscillator. After the POR counter times out, the XTAL Counter is
enabled to count a total of 16 system clock pulses. The devices are held in the Reset state
until both the POR Counter and XTAL counter have timed out. After the Z8 Encore! XP
F64xx Series devices exit the Power -On Reset state, the eZ8 CPU fetches the Reset vector .
Following Power-On Reset, the POR status bit in the Watchdog Timer Control
(WDTCTL) Register is set to 1.
Figure 8 displays Power-On Reset operation. For the POR threshold voltage (VPOR), see
the Electrical Characteristics chapter on page 200.
Figure 8. Power-On Reset Operation
VCC = 0.0 V
VCC = 3.3V
VPOR
VVBO
Primary
Oscillator
Internal RESET
signal
Program
Execution
Oscillator
Start-up
XTAL
WDT Clock
POR counter delaycounter delay
PS019924-0113 PREL I M I N A RY Reset Sources
Z8 Encore! XP® F64xx Series
Product Specification
31
Voltage Brown-Out Reset
The devices in the Z8 Encore! XP F64xx Series provide low Voltage Brown-Out protec-
tion. The VBO circuit senses when the supply voltage drops to an unsafe level (below the
VBO threshold voltage) and forces the device into the Reset state. While the supply volt-
age remains below the Power-On Reset voltage threshold (VPOR), the VBO block holds
the device in the Reset state.
After the supply voltage again exceeds the Power -On Reset voltage threshold, the devices
progress through a full system reset sequence, as described in the Power-On Reset section.
Following Power-On Reset, the POR status bit in the Watchdog Timer Control
(WDTCTL) Register is set to 1. Figure 9 displays Voltage Brown-Out operation. For the
VBO and POR threshold voltages (VVBO and VPOR), see the Electrical Characteristics
chapter on page 200.
The Voltage Brown-Out circuit can be either enabled or disabled during STOP Mode.
Operation during STOP Mode is set by the VBO_AO option bit. For information about
configuring VBO_AO, see the Option Bits chapter on page 180.
Figure 9. Voltage Brown-Out Reset Operation
VCC = 3.3V
VPOR
VVBO
Internal RESET
Signal
Program
Execution
Program
Execution Voltage
Brown-Out
VCC = 3.3V
Primary
Oscillator
WDT Clock
XTALPOR Counter DelayCounter Delay
PS019924-0113 PR E L I M INARY Stop Mode Recovery
Z8 Encore! XP® F64xx Series
Product Specification
32
Watchdog Timer Reset
If the device is in normal or HALT Mode, the Watchdog Timer can initiate a system reset
at time-out if the WDT_RES option bit is set to 1. This capability is the default
(unprogrammed) setting of the WDT_RES option bit. The WDT status bit in the WDT
Control Register is set to signify that the reset was initiated by the Watchdog Timer.
External Pin Reset
The RESET pin has a Schmitt-triggered input, an internal pull-up, an analog filter and a
digital filter to reject noise. Once the RESET pin is asserted for at least 4 system clock
cycles, the devices progress through the system reset sequence. While the RESET input
pin is asserted Low, the Z8 Encore! XP F64xx Series devices continue to be held in the
Reset state. If the RESET pin is held Low beyond the system reset time-out, the devices
exit the Reset state immediately following RESET pin deassertion. Following a system
reset initiated by the external RESET pin, the EXT status bit in the Watchdog Timer Con-
trol (WDTCTL) Register is set to 1.
On-Chip Debugger Initiated Reset
A Power-On Reset can be initiated using the On-Chip Debugger by setting the RST bit in
the OCD Control Register. The On-Chip Debugger block is not reset but the rest of the
chip goes through a normal system reset. The RST bit automatically clears during the sys-
tem reset. Following the system reset the POR bit in the WDT Control Register is set.
Stop Mode Recovery
STOP Mode is entered by the eZ8 executing a stop instruction. For detailed STOP Mode
information, see the Low-Power Modes chapter on page 34. During S top Mo de Recovery,
the devices are held in reset for 66 cycles of the Watchdog T imer oscillator followed by 16
cycles of the system clock. S top Mode Recovery only affects the contents of the Watchdog
Timer Control Register. Stop Mode Recovery does not affect any other values in the Reg-
ister File, including the S tack Pointer, Register Pointer , Flags, peripheral control registers,
and general-purpose RAM.
The eZ8 CPU fetches the Reset vector at program memory addresses 0002H and 0003H
and loads that value into the Program Counter. Program execution begins at the Reset vec-
tor address. Following Stop Mode Recovery, the stop bit in the Watchdog Timer Control
Register is set to 1. Table 10 lists the Stop Mode Recovery sources and resulting actions.
PS019924-0113 PR E L I M INARY Stop Mode Recovery
Z8 Encore! XP® F64xx Series
Product Specification
33
Stop Mode Recovery Using Watchdog Timer Time-Out
If the Watchdog Timer times out during STOP Mode, the device undergoes a Stop Mode
Recovery sequence. In the Watchdog Timer Control Register, the WDT and stop bits are
set to 1. If the Watchdog Timer is configured to generate an interrupt upon time-out and
the Z8 Encore! XP F64xx Series devices are configured to respond to interrupts, the eZ8
CPU services the Watchdog Timer interrupt request following the normal Stop Mode
Recovery sequence.
Stop Mode Recovery Using a GPIO Port Pin Transition HALT
Each of the GPIO port pins may be co nfigured as a S to p Mode Recovery input sou rce. On
any GPIO pin enabled as a Stop Mode Recovery source, a change in the input pin value
(from High to Low or from Low to High) initiates Stop Mode Recovery. The GPIO Stop
Mode Recovery signals are filtered to reject pulses less than 10 ns (typical) in duration. In
the Watchdog Timer Control Register, the stop bit is set to 1.
In STOP Mode, the GPIO Port Input Data registers (PxIN) are disabled. The Port Input
Data registers record the Port transition only if the signal stays on the Port pin through
the end of the Stop Mode Recovery delay. Thus, short pulses on the Port pin can initiate
Stop Mode Recovery without being written to the Port Input Data Register or without ini-
tiating an interrupt (if enabled for that pin).
Table 10. Stop Mode Recovery Sources and Resulting Action
Operating Mode Stop Mode Recovery Source Action
STOP Mode Watchdog Timer time-out when configured
for Reset. Stop Mode Recovery.
Watchdog Timer time-out when configured
for interrupt. Stop Mode Recovery followed by
interrupt (if interrupts are enabled).
Data transition on any GPIO p ort pin enabled
as a Stop Mode Recovery source. Stop Mode Recovery.
Caution:
PS019924-0113 PR E L I M I NARY Low-Power Modes
Z8 Encore! XP® F64xx Series
Product Specification
34
Low-Power Modes
The Z8 Encore! XP F64xx Series products contain power-saving features. The highest
level of power reduction is provided by ST OP M ode. The next level of power red uction is
provided by HALT Mode.
STOP Mode
Execution of the eZ8 CPU’s stop instruction places the device into STOP Mode. In ST OP
Mode, the operating characteristics are:
•
Primary crystal oscillator is stopped; the XIN pin is driven High and the XOUT pin is
driven Low
•
System clock is stopped
•
eZ8 CPU is stopped
•
Program counter (PC) stops incrementing
•
The Watchdog Timer and its internal RC oscillator continue to operate, if enabled for
operation during STOP Mode
•
The Voltage Brown-Out protection circuit continues to operate, if enabled for operation
in STOP Mode using the a ssociated option bit
•
All other on-chip peripherals a r e idle
To minimize current in STOP Mode, all GPIO pins that are configured as digita l inputs
must be driven to one of the supply rails (VCC or GND), the Voltage Brown-Out protection
must be disabled, and the Watchdog Timer must be disabled. The devices can be brought
out of STOP Mode using Stop Mode Recovery. For more information about Stop Mode
Recovery, see the Re set and Stop Mode Recovery chapter on page 28.
STOP Mode must not be used when driving the Z8 Encore! XP F64xx Series devices
with an external clock driver source.
Caution:
PS019924-0113 PR E L I MINARY HALT Mode
Z8 Encore! XP® F64xx Series
Product Specification
35
HALT Mode
Execution of the eZ8 CPU’s HALT instruction places the device into HALT Mode. In
HALT Mode, the operating characteristics are:
•
Primary crystal oscillator is enabled and continues to operate
•
System clock is enabled and continues to operate
•
eZ8 CPU is stopped
•
Program Counter stops incrementing
•
Watchdog Timer’s internal RC oscillator continues to operate
•
The Watchdog Timer continues to opera te, if enabled
•
All other on-chip periph erals continue to operat e
The eZ8 CPU can be brought ou t of HALT Mode by any of the follo wing operations:
•
Interrupt
•
Watchdog Timer time-out (interrupt or reset)
•
Power-On Reset
•
Voltage Brown-Out Reset
•
External RESET pin assertion
To minimize current in HALT Mo de, all GPIO pins which are configured as inputs must
be driven to one of the supply rails (VCC or GND).
PS019924-0113 PR E L I M INARY General-Purpose I/O
Z8 Encore! XP® F64xx Series
Product Specification
36
General-Purpose I/O
The Z8 Encore! XP F64xx Series products support a maximum of seven 8-bit ports (ports
A–G) and one 4-bit port (Port H) for general-purpose input/output (GPIO) operations.
Each port consists of control and data registers. The GPIO control registers are used to
determine data direction, open-drain, output drive current and alternate pin functions.
Each port pin is individually prog rammable. All ports (except B and H) support 5 V-toler-
ant inputs.
GPIO Port Availability By Device
Table 11 lists the port pins available with each device and package type.
Table 11. Port Availability by Device and Package Type
Device Packages Port A Port B Port C Port D Port E Port F Port G Port H
Z8X162140-pin [7:0][7:0][7:0][6:3,1:0]––––
44-pin [7:0][7:0][7:0][6:0]––––
Z8X1622 64- and 68-pin [7:0] [7:0] [7:0] [7:0] [7:0] [7] [3] [3:0]
Z8X242140-pin [7:0][7:0][7:0][6:3,1:0]––––
44-pin [7:0][7:0][7:0][6:0]––––
Z8X2422 64- and 68-pin [7:0] [7:0] [7:0] [7:0] [7:0] [7] [3] [3:0]
Z8X322140-pin [7:0][7:0][7:0][6:3,1:0]––––
44-pin [7:0][7:0][7:0][6:0]––––
Z8X3222 64- and 68-pin [7:0] [7:0] [7:0] [7:0] [7:0] [7] [3] [3:0]
Z8X482140-pin [7:0][7:0][7:0][6:3,1:0]––––
44-pin [7:0][7:0][7:0][6:0]––––
Z8X4822 64- and 68-pin [7:0] [7:0] [7:0] [7:0] [7:0] [7] [3] [3:0]
Z8X4823 80-pin [7:0] [7:0] [7:0] [7:0] [7:0] [7:0] [7:0] [3:0]
Z8X642140-pin [7:0][7:0][7:0][6:3,1:0]––––
44-pin [7:0][7:0][7:0][6:0]––––
Z8X6422 64- and 68-pin [7:0] [7:0] [7:0] [7:0] [7:0] [7] [3] [3:0]
Z8X6423 80-pin [7:0] [7:0] [7:0] [7:0] [7:0] [7:0] [7:0] [3:0]
PS019924-0113 PRELIMINA R Y Architecture
Z8 Encore! XP® F64xx Series
Product Specification
37
Architecture
Figure 10 displays a simplified block diagram of a GPIO port pin. In this figure, the ability
to accommodate alternate functions and variable port current drive strength are not illus-
trated.
GPIO Alternate Functions
Many of the GPIO port pins can be used as both general-purpose I/O and to provide access
to on-chip peripheral functions such as the timers and serial communication devices. The
Port A–H Alternate Function subregisters configure these pins for either general-purpose
I/O or alternate function operation. When a pin is configured for alternate function, control
of the port pin direction (input/output) is passed from the Port A–H Data Direction regis-
ters to the alternate function assigned to this pin. Table 12 lists the alternate functions
associated with each port pin.
Figure 10. GPIO Port Pin Block Diagram
DQ
DQ
GND
VDD
Port Output Control
Port Data Directi o n
Port Output
Data Register
Port Input
Data Register
Port
Pin
DATA
Bus
System
Clock
System
Clock
Schmitt-Trigger
PS019924-0113 PR E L I M I NARY GPIO Alternate Functions
Z8 Encore! XP® F64xx Series
Product Specification
38
Table 12. Port Alternate Function Mapping
Port Pin Mnemonic Alternate Function Description
Port A PA0 T0IN Timer 0 Input
PA1 T0OUT Tim e r 0 Outp ut
PA2 DE0 UART 0 Driver Enable
PA3 CTS0 UART 0 Clear to Send
PA4 RXD0/IRRX0 UART 0/IrDA 0 Receive Data
PA5 TXD0/IRTX0 UART 0/IrDA 0 Transmit Data
PA6 SCL I2C Clock (automatically open-drain)
PA7 SDA I2C Data (automatically open-drain)
Port B PB0 ANA0 ADC analog input 0
PB1 ANA1 ADC analog input 1
PB2 ANA2 ADC analog input 2
PB3 ANA3 ADC analog input 3
PB4 ANA4 ADC analog input 4
PB5 ANA5 ADC analog input 5
PB6 ANA6 ADC analog input 6
PB7 ANA7 ADC analog input 7
Port C PC0 T1IN Timer 1 Input
PC1 T1OUT Timer 1 Ou tp ut
PC2 SS SPI Slave Select
PC3 SCK SPI Serial Clock
PC4 MOSI SPI Master Out/Slave In
PC5 MISO SPI Master In/Slave Out
PC6 T2IN Timer 2 In
PC7 T2OUT Timer 2 Ou t
Port D PD0 T3IN Timer 3 In (unavailable in the 44-pin package)
PD1 T3OUT Timer 3 Ou t (una va ilab l e in th e 44-p i n package)
PD2 N/A No alternate function
PD3 DE1 UART 1 Driver Enable
PD4 RXD1/IRRX1 UART 1/IrDA 1 Receive Data
PD5 TXD1/IRTX1 UART 1/IrDA 1 Transmit Data
PD6 CTS1 UART 1 Clear to Send
PD7 RCOUT Watchdog Timer RC Oscillator Output
Port E PE[7:0] N/A No alternate functions
PS019924-0113 PR E L I M INARY GPIO Interrupts
Z8 Encore! XP® F64xx Series
Product Specification
39
GPIO Interrupts
Many of the GPIO port pins can be used as interrupt sources. Some port pins may be con-
figured to generate an interrupt request on either the rising edge or falling edge of the pin
input signal. Other port pin interrupts generate an interrupt when any edge occurs (both
rising and falling). For more information about interrupts using the GPIO pins, see the
Interrupt Controller chapter on page 47.
GPIO Control Register Definitions
Four registers for each Port provide access to GPIO control, input data, and output data.
Table 13 lists these Port registers. Use the Port A–H Address and Control registers
together to provide access to subregisters for Port configuration and control.
Port F PF[7:0] N/A No alternate functions
Port G PG[7:0] N/A No alternate functions
Port H PH0 ANA8 ADC analog input 8
PH1 ANA9 ADC analog input 9
PH2 ANA10 ADC analog input 10
PH3 ANA11 ADC analog input 11
Table 13. GPIO Port Registers and Subregisters
Port Register
Mnemonic Port Register Name
PxADDR Port A–H Address Register (selects subregisters)
PxCTL Port A–H Control Register (provides access to subregisters)
PxIN Port A–H Input Data Register
PxOUT Port A–H Output Data Register
Port Subregister
Mnemonic Port Register Name
PxDD Data Direction
PxAF Alternate Function
PxOC Output Control (Open-Drain)
PxDD High Drive Enable
PxSMRE Stop Mode Recovery Source Enable
Table 12. Port Alternate Function Mapping (Continued)
Port Pin Mnemonic Alternate Function Description
PS019924-0113 PREL I M I N A RY GPIO Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
40
Port A–H Address Registers
The Port A–H Address registers, shown in Table 14, select the GPIO port functionality
accessible through the Port A–H Control registers. The Port A–H Address and Control
registers combine to provide access to all GPIO port control.
Table 14. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Bit Description
[7:0]
PADDR Port Address
This port address selects one of the subregisters accessible through the Port A–H Control
Registers.
00H = No function. Pro vid es som e pr ot ec tio n ag ainst ac cid ental port reco n fig ur at ion .
01H = Data Direction.
02H = Alternate Function.
03H = Output Control (Open-Drain).
04H = High Drive Enable.
05H = Stop Mode Recovery Source Enable.
06H–FFH = No function.
PS019924-0113 PREL I M I N A RY GPIO Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
41
Port A–H Control Registers
The Port A–H Control registers, shown in Table 15, set the GPIO port operation. The
value in the corresponding Port A–H Address Register determines the control subregisters
accessible using the Port A–H Control Register.
Port A–H Data Direction Subregisters
The Port A–H Data Direction Subregister , shown in Table 16, is accessed through the Port
A–H Control Register by writing 01H to the Port A–H Address Register.
Table 15. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Bit Description
[7:0]
PCTL Port Control
The Port Control Register provides access to all subregisters that configure the GPIO Port
operation.
Table 16. Port A–H Data Direction Subregisters
Bit 76543210
Field DD7 DD6 DD5 DD4 DD3 DD2 DD1 DD0
RESET 1
R/W R/W
Address See note.
Note: I f a 01H exists in the Port A–H Address Register, it is accessible through the Port A–H Control Register.
Bit Description
[7:0]
DDx Data Direction
These bits control the direction of the associated port pin. Port Alternate Function operation
overrides the Data Direction Register setting.
0 = Output. Data in the Port A–H Output Data Register is driven onto the port pin.
1 = Input. The port pin is sampled and the value written into the Port A–H Input Data Register.
The output driver is tri-s tated.
Note: x indicates register bits in the range [7:0].
PS019924-0113 PREL I M I N A RY GPIO Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
42
Port A–H Alternate Function Subregisters
The Port A–H Alternate Function Subregister, shown in Table 17, is accessed through the
Port A–H Control Register by writing 02H to the Port A–H Address Register. The Port A–
H Alternate Function subregisters select the alternate functions for the selected pins. To
determine the alternate function associated with each port pin, see the GPIO Alternate
Functions section on page 37.
Do not enable alternate function for GPIO port pins which do not have an associated al-
ternate function. Failure to follow this guideline may result in unpredictable operation.
Table 17. Port A–H Alternate Function Subregisters
Bit 76543210
Field AF7 AF6 AF5 AF4 AF3 AF2 AF1 AF0
RESET 0
R/W R/W
Address See note.
Note: I f a 02H exists in the Port A–H Address Register, it is accessible through the Port A–H Control Register.
Bit Description
[7:0]
AFx Port Alternate Function Enabled
0 = The port pin is in NORMAL Mode and the DDx bit in the Port A–H Data Direction Subregis-
ter determines the direction of the pin.
1 = The alternate function is selected. Port pin operation is controlled by the alternate function.
Note: x indicates register bits in the range [7:0].
Caution:
PS019924-0113 PREL I M I N A RY GPIO Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
43
Port A–H Output Control Subregisters
The Port A–H Output Control Subregister , shown in T able 18, is accessed through the Port
A–H Control Register by writing 03H to the Port A–H Address Register. Setting the bits in
the Port A–H Output Control subregisters to 1 configures the specified port pins for open-
drain operation. These subregisters affect the pins directly and, as a result, alternate func-
tions are also affected.
Table 18. Port A–H Output Control Subregisters
Bit 76543210
Field POC7 POC6 POC5 POC4 POC3 POC2 POC1 POC0
RESET 0
R/W R/W
Address See note.
Note: I f a 03H exists in the Port A–H Address Register, it is accessible through the Port A–H Control Register.
Bit Description
[7:0]
POCx Port Output Control
These bit s fu nctio n ind ep end ent ly of the alternate function bit and disables the drains if set to 1.
0 = The drains are enabled for any output mode.
1 = The drain of the associated pin is disabled (open-drain mode).
Note: x indicates register bits in the range [7:0].
PS019924-0113 PREL I M I N A RY GPIO Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
44
Port A–H High Drive Enable Subregisters
The Port A–H High Drive Enable Subregister, shown in Table 19, is accessed through the
Port A–H Control Register by writing 04H to the Port A–H Address Register. Setting the
bits in the Port A–H High Drive Enable subr egisters to 1 configures the specified port pins
for high-current o utput drive operation. The Port A–H High Drive Enable Subregister
affects the pins directly and, as a result, alternate functions are also affected.
Table 19. Port A–H High Drive Enable Subregisters
Bit 76543210
Field PHDE7 PHDE6 PHDE5 PHDE4 PHDE3 PHDE2 PHDE1 PHDE0
RESET 0
R/W R/W
Address See note.
Note: I f a 04H exists in the Port A–H Address Register, it is accessible through the Port A–H Control Register.
Bit Description
[7:0]
PHDEx Port High Drive Enabled
0 = The Port pin is configured for standard output current drive.
1 = The Port pin is configured for high output current drive.
Note: x indicates register bits in the range [7:0].
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Port A–H Stop Mode Recovery Source Enable Subregisters
The Port A–H Stop Mode Recovery Source Enable Subregister, shown in Table 20, is
accessed through the Port A–H Control Register by writing 05H to the Port A–H Address
Register. Setting the bits in the Port A–H Stop Mode Recovery Source Enable subregisters
to 1 configures the specified Port pins as a Stop Mode Recovery source. During STOP
Mode, any logic transition on a Port pin enabled as a Stop Mode Recovery source initiates
Stop Mode Recovery.
Table 20. Port A–H Stop Mode Recovery Source Enable Subregisters
Bit 76543210
Field PSMRE7 PSMRE6 PSMRE5 PSMRE4 PSMRE3 PSMRE2 PSMRE1 PSMRE0
RESET 0
R/W R/W
Address See note.
Note: I f a 05H exists in the Port A–H Address Register, it is accessible through the Port A–H Control Register.
Bit Description
[7:0]
PSMRE Port Stop Mode Recovery Source Enabled
0 = The port pin is not configured as a Stop Mode Recovery source. Transitions on this pin dur-
ing STOP Mode do not initiate Stop Mode Recovery.
1 = The por t pin is configur ed as a Stop Mode Recovery sou rce. Any logic transitio n on this pin
during STOP Mode initiates Stop Mode Recovery.
Note: x indicates register bits in the range [7:0].
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Port A–H Input Data Registers
Reading from the Port A–H Input Data registers, shown in Table 21, returns the sampled
values from the corresponding port pins. The Port A–H Input Data registers are read-only.
Port A–H Output Data Register
The Port A–H Output Data Register, shown in Table 22, writes output data to the pins.
Table 21. Port A–H Input Data Registers (P xIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
Bit Description
[7:0]
PxIN Port Input Data
Sampled data from the corresponding port pin input.
0 = Input data is logical 0 (Low).
1 = Input data is logical 1 (High).
Note: x indicates register bits in the range [7:0].
Table 22. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Bit Description
[7:0]
PxOUT Port Output Data
These bit s cont ain the dat a to be driven out from the port pins. The values are only d riven if the
corresponding pin is configure d as an output and the pin is not configured for alternate function
operation.
0 = Drive a logical 0 (Low).
1 = Drive a logical 1 (High). High value is not driven if the drain has been disabled by setting
the corresponding Port Output Control Register bit to 1.
Note: x indicates register bits in the range [7:0].
PS019924-0113 PREL I M I N A RY Interrupt Controller
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Product Specification
47
Interrupt Controller
The interrupt controller on the Z8 Encore! XP F64xx Series products prioritizes the inter-
rupt requests from the on-chip peripherals and the GPIO port pins. The features of the
interrupt controller include:
•
24 unique interrupt vectors:
–12 GPIO port pin interrupt sources
–12 on-chip peripheral interrupt sources
•
Flexible GPIO interrupts
–Eight selectable rising and falling edge GPIO interrupts
–Four dual-edge interrupts
•
Three levels of individually programmable interrupt priority
•
Watchdog Timer can be configured to generate an interrupt
Interrupt requests (IRQs) allow peripheral devices to suspend CPU operation in an orderly
manner and force the CPU to start an interrupt service routine (ISR). Usually this interrupt
service routine is involved with the exchange of data, status information, or control infor-
mation between the CPU and the interrupting peripheral. When the service routine is com-
pleted, the CP U retu rns to the operation from which it was interrupted.
The eZ8 CPU supports both vectored and polled interru pt handling. For polled interrupts,
the interrupt control has no effect on operation. For more information about interrupt ser-
vicing by the eZ8 CPU, refer to the eZ8 CPU Core User Manual (UM0128), which is
available for download on www.zilog.com.
Interrupt Vector Listing
Table 23 lists all of the interrupts available in order of priority. The interrupt vector is
stored with the most significant byte (MSB) at the even program memory address and the
least significant byte (LSB) at the following odd program memory address.
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Table 23. Interrupt Vectors in Order of Priority
Priority Program Memory
Vector Address Interrupt Source
Highest 0002H Reset (not an interrupt)
0004H Watchdog Timer (see the Watchdog Timer chapter on page 80)
0006H Illegal Instruction Trap (not an interrupt)
0008H Timer 2
000AH Timer 1
000CH Timer 0
000EH UART 0 receiver
0010H UART 0 transmitter
0012H I2C
0014H SPI
0016H ADC
0018H Port A7 or Port D7, rising or falling input edge
001AH Port A6 or Port D6, risin g or falling input edge
001CH Port A5 or Port D5, rising or falling input edge
001EH Port A4 or Port D4, risin g or falling input edge
0020H Port A3 or Port D3, rising or falling input edge
0022H Port A2 or Port D2, rising or falling input edge
0024H Port A1 or Port D1, rising or falling input edge
0026H Port A0 or Port D0, rising or falling input edge
0028H Timer 3 (not available in the 44-pin package)
002AH UART 1 receiver
002CH UART 1 transmitter
002EH DMA
0030H Port C3, both input edges
0032H Port C2, both input edges
0034H Port C1, both input edges
Lowest 0036H Port C0, both input edges
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Architecture
Figure 11 displays a block diagram of the interrupt controller.
Operation
This section describes the operational aspects of the followi ng functions.
Master Interrupt Enable: see page 49
Interrupt Vectors and Priority: see page 50
Interrupt Assertion: see page 50
Software Interrupt Assertion: see page 51
Master Interrupt Enable
The master interrupt enable bit (IRQE) in the Interrupt Control Register globally enables
and disables interrupts.
Interrupts are globally enabled by any of the following actions:
•
Executing an Enable Interrupt (EI) instruction
•
Executing an Return from Interrupt (IRET) instruction
Figure 11. Interrupt Controller Block Diagram
Vector
IRQ Request
High
Priority
Medium
Priority
Low
Priority
Priority
Mux
Interrupt Request Latches and Control
Port Interrupts
Internal Interrupts
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•
Writing a 1 to the IRQE bit in the Interrupt Control Register
Interrupts are globally disabled by any of the following operations:
•
Execution of a Disable Interrupt (DI) instruction
•
eZ8 CPU acknowledgement of an interrupt service request from the interrupt controller
•
Writing a 0 to the IRQE bit in the Interrupt Control Register
•
Reset
•
Executing a trap instruction
•
Illegal instruction trap
Interrupt Vectors and Priority
The interrupt controller supports three levels of interrupt priority. Level 3 is the highest
priority, Level 2 is the second highest priority, and Level 1 is the lowest priority. If all of
the interrupts were enabled with identical interrupt priority (all as Level 2 interrupts, for
example), then the interrupt priority would be assigned from highest to lowes t, as speci-
fied in Table 23. Level 3 interrupts always have higher priority than Level 2 interrupts
which, in turn, always have higher priority than Level 1 interrupts. Within each interrupt
priority level (Level 1, Level 2, or Level 3), priority is assigned as specified in Table 23.
Resets, Watchdog Timer inte rrupts (if enabled), and illegal instruction traps always have
highest priority.
Interrupt Assertion
Interrupt sources assert their interrupt requests for only a single system clock period (sin-
gle pulse). When the interrupt request is acknowledged by the eZ8 CPU, the correspond-
ing bit in the Interrupt Request Register is cleared until the next interrupt occurs. W riting a
0 to the corresponding bit in the Interrupt Request Register likewise clears the interrupt
request.
Zilog recommends not using a coding style that clears bits in the Interrupt Request reg-
isters. All incoming interrupts received between execution of the first LDX command
and the final LDX command are lost. See Example 1, whic h follows.
Example 1. A poor coding style that can result in lost interrupt requests:
LDX r0, IRQ0
AND r0, MASK
LDX IRQ0, r0
Caution:
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To avoid missing interrupts, use the coding style in Example 2 to clear bits in the Interrupt
Request 0 Register:
Example 2. A good coding style that avoids lost interrupt requests:
ANDX IRQ0, MASK
Software Interrupt Assertion
Program code can generate interrupts directly. Writing a 1 to the appropriate bit in the
Interrupt Request Register triggers an interrupt (assuming that interrupt is enabled). When
the interrupt request is acknowledged by the eZ8 CPU, the bit in the Interrupt Request
Register is automatically cleared to 0.
Zilog recommends not using a coding style to generate software interrupts by setting bits
in the Interrupt Request registers. All incoming interrupts received between execution of
the first LDX command and the final LDX command are lost. See Example 3, which fol-
lows.
Example 3. A poor coding style that can result in lost interrupt requests:
LDX r0, IRQ0
OR r0, MASK
LDX IRQ0, r0
To avoid missing interrupts, use the coding style in Example 4 to set bits in the Interrupt
Request registers:
Example 4. A good coding style that avoids lost interrupt requests:
ORX IRQ0, MASK
Interrupt Control Register Definitions
For all interrupts other than the Watchdog Timer interrupt, the interrupt control registers
enable individual interrupts, set interrupt priorities, and indicate interrupt requests.
Interrupt Request 0 Register
The Interrupt Request 0 (IRQ0) Register, shown in Table 24, stores the interrupt requests
for both vectored and polled interrupts. When a request is presented to the interrupt con-
troller, the corresponding bit in the IRQ0 Register becomes 1. If interrupts are globally
enabled (vectored interrupts), the interrupt controller passes an interrupt request to the eZ8
CPU. If interrupts are globally disabled (polled interrupts), the eZ8 CPU can read the
Interrupt Request 0 Register to determine if any interrupt requests are pending.
Caution:
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Table 24. Interrupt Request 0 Register (IRQ0)
Bit 76543210
Field T2I T1I T0I U0RXI U0TXI I2CI SPII ADCI
RESET 0
R/W R/W
Address FC0H
Bit Description
[7]
T2I Timer 2 Interrupt Request
0 = No interrupt request is pending for Timer 2.
1 = An interrupt request from Timer 2 is awaiting service.
[6]
T1I Timer 1 Interrupt Request
0 = No interrupt request is pending for Timer 1.
1 = An interrupt request from Timer 1 is awaiting service.
[5]
T0I Timer 0 Interrupt Request
0 = No interrupt request is pending for Timer 0.
1 = An interrupt request from Timer 0 is awaiting service.
[4]
U0RXI UART 0 Receiver Interrupt Request
0 = No interrupt request is pending for the UART 0 receiver.
1 = An interrupt request from the UART 0 receiver is awaiting service.
[3]
U0TXI UART 0 Transmitter Interrupt Request
0 = No interrupt request is pending for the UART 0 transmitter.
1 = An interrupt request from the UART 0 transmitter is awaiting service.
[2]
I2CI I2C Interrupt Request
0 = No interrupt request is pending for the I2C.
1 = An interrupt request from the I2C is awaiting service.
[1]
SPII SPI Interrupt Request
0 = No interrupt request is pending for the SPI.
1 = An interrupt request from the SPI is awaiting service.
[0]
ADCI ADC Interrupt Request
0 = No interrupt request is pending for the Analog-to-Digital Converter.
1 = An interrupt request from the Analog-to-Digital Converter is awaiting service.
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Interrupt Request 1 Register
The Interrupt Request 1 (IRQ1) Register, shown in Table 25, stores interrupt requests for
both vectored and polled interrupts. When a req uest is presented to the interrupt controller,
the corresponding bit in the IRQ1 Register becomes 1. If interrupts are globally enabled
(vectored interrupts), the interrupt controller passes an interrupt request to the eZ8 CPU. If
interrupts are globally disabled (polled interrupts), the eZ8 CPU can read the Interrupt
Request 1 Register to determine if any interrupt requests are pending.
For each pin, only 1 of either Port A or Port D can be e nabled for inte rrupts at any one
time. Port selection (A or D) is determined by the values in the Interrupt Port Select Regis-
ter (IRQPS): see page 60.
Table 25. Interrupt Request 1 Register (IRQ1)
Bit 76543210
Field PAD7I PAD6I PAD5I PAD4I PAD3I PAD2I PAD1I PAD0I
RESET 0
R/W R/W
Address FC3H
Bit Description
[7:0]
PADxI Port A or Port D Pin x Interrupt Request
0 = No interrupt request is pending for GPIO Port A or Port D pin x.
1 = An interrupt request from GPIO Port A or Port D pin x is awaiting service.
Note: x indicates the specific GPIO Port A or D pin in the range [7:0].
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Interrupt Request 2 Register
The Interrupt Request 2 (IRQ2) Register, shown in Table 26, stores interrupt requests for
both vectored and polled interrupts. When a req uest is presented to the interrupt controller,
the corresponding bit in the IRQ2 Register becomes 1. If interrupts are globally enabled
(vectored interrupts), the interrupt controller passes an interrupt request to the eZ8 CPU. If
interrupts are globally disabled (polled interrupts), the eZ8 CPU can read the Interrupt
Request 1 Register to determine if any interrupt requests are pending.
Table 26. Interrupt Request 2 Register (IRQ2)
Bit 76543210
Field T3I U1RXI U1TXI DMAI PC3I PC2I PC1I PC0I
RESET 0
R/W R/W
Address FC6H
Bit Description
[7]
T3I Timer 3 Interrupt Request
0 = No interrupt request is pending for Timer 3.
1 = An interrupt request from Timer 3 is awaiting service.
[6]
U1RXI UART 1 Receive Interrupt Request
0 = No interrupt request is pending for the UART1 receiver.
1 = An interrupt request from UART1 receiver is awaiting service.
[5]
U1TXI UART 1 Transmit Interrupt Request
0 = No interrupt request is pending for the UART 1 transmitter.
1 = An interrupt request from the UART 1 transmitter is awaiting service.
[4]
DMAI DMA Interrupt Request
0 = No interrupt request is pending for the DMA.
1 = An interrupt request from the DMA is awaiting service.
[3:0]
PCxI Port C Pin x Interrupt Request
0 = No interrupt request is pending for GPIO Port C pin x.
1 = An interrupt request from GPIO Port C pin x is awaiting service.
Note: x indicates the specific GPIO Port C pin in the range [3:0].
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IRQ0 Enable High and Low Bit Registers
Table 27 describes the priority control for IRQ0. The IRQ0 Enable High and Low Bit reg-
isters, shown in Tables 28 and 29, form a priority-encoded enabling for interrupts in the
Interrupt Request 0 Register. Priority is generated by setting bits in each register.
Table 27. IRQ0 Enable and Priority Encoding
IRQ0ENH[x]IRQ0ENL[x] Priority Description
0 0 Disabled Disabled
0 1 Level 1 Low
1 0 Level 2 Nominal
1 1 Level 3 High
Note: x indicates register bits in the range [7:0].
Table 28. IRQ0 Enable High Bit Register (IRQ0ENH)
Bit 76543210
Field T2ENH T1ENH T0ENH U0RENH U0TENH I2CENH SPIENH ADCENH
RESET 0
R/W R/W
Address FC1H
Bit Description
[7]
T2ENH Timer 2 Interrupt Request Enable High Bit
[6]
T1ENH Timer 1 Interrupt Request Enable High Bit
[5]
T0ENH Timer 0 Interrupt Request Enable High Bit
[4]
U0RENH UART 0 Receive Interrupt Request Enable High Bit
[3]
U0TENH UART 0 Transmit Interrupt Request Enable High Bit
[2]
I2CENH I2C Interrupt Request Enable High Bit
[1]
SPIENH SPI Interrupt Request Enable High Bit
[0]
ADCENH ADC Interrupt Request Enable High Bit
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IRQ1 Enable High and Low Bit Registers
Table 30 describes the priority control for IRQ1. The IRQ1 Enable High and Low Bit reg-
isters, shown in Tables 31 and 32, form a priority-encoded enabling for interrupts in the
Interrupt Request 1 Register. Priority is generated by setting bits in each register.
Table 29. IRQ0 Enable Low Bit Register (IRQ0ENL)
Bit 76543210
Field T2ENL T1ENL T0ENL U0RENL U0TENL I2CENL SPIENL ADCENL
RESET 0
R/W R/W
Address FC2H
Bit Description
[7]
T2ENL Timer 2 Interrupt Request Enable Low Bit
[6]
T1ENL Timer 1 Interrupt Request Enable Low Bit
[5]
T0ENL Timer 0 Interrupt Request Enable Low Bit
[4]
U0RENL UART 0 Receive Interrupt Request Enable Low Bit
[3]
U0TENL UART 0 Transmit Interrupt Request Enable Low Bit
[2]
I2CENL I2C Interrupt Request Enable Low Bit
[1]
SPIENL SPI Interrupt Request Enable Low Bit
[0]
ADCENL ADC Interrupt Request Enable Low Bit
Table 30. IRQ1 Enable and Priority Encoding
IRQ1ENH[x]IRQ1ENL[x] Priority Description
0 0 Disabled Disabled
0 1 Level 1 Low
1 0 Level 2 Nominal
1 1 Level 3 High
Note: x indicates register bits in the range [7:0].
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Table 31. IRQ1 Enable High Bit Register (IRQ1ENH)
Bit 76543210
Field PAD7ENH PAD6ENH PAD5ENH PAD4ENH PAD3ENH PAD2ENH PAD1ENH PAD0ENH
RESET 00000000
R/W R/WR/WR/WR/WR/WR/WR/WR/W
Address FC4H
Bit Description
[7:0]
PADxENH Port A or Port D Bit[x] Interrupt Request Enable High Bit
To select either Port A or Port D as the interrupt source, see the Interrupt Port Select Regis-
ter on page 60.
Note: x indicates register bits in the range [7:0].
Table 32. IRQ1 Enable Low Bit Register (IRQ1ENL)
Bit 76543210
Field PAD7ENL PAD6ENL PAD5ENL PAD4ENL PAD3ENL PAD2ENL PAD1ENL PAD0ENL
RESET 00000000
R/W R/WR/WR/WR/WR/WR/WR/WR/W
Address FC5H
Bit Description
[7:0]
PADxENL Port A or Port D Bit[x] Interrupt Request Enable Low Bit
To select either Port A or Port D as the interrupt source, see the Interrupt Port Select Regis-
ter on page 60.
Note: x indicates register bits in the range [7:0].
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IRQ2 Enable High and Low Bit Registers
Table 33 describes the priority control for IRQ2. The IRQ2 Enable High and Low Bit reg-
isters, shown in Tables 34 and 35, form a priority-encoded enabling for interrupts in the
Interrupt Request 2 Register. Priority is generated by setting bits in each register.
Table 33. IRQ2 Enable and Priority Encoding
IRQ2ENH[x]IRQ2ENL[x] Priority Description
0 0 Disabled Disabled
0 1 Level 1 Low
1 0 Level 2 Nominal
1 1 Level 3 High
Note: x indicates register bits in the range [7:0].
Table 34. IRQ2 Enable High Bit Register (IRQ2ENH)
Bit 76543210
Field T3ENH U1RENH U1TENH DMAENH C3ENH C2ENH C1ENH C0ENH
RESET 0
R/W R/W
Address FC7H
Bit Description
[7]
T3ENH Timer 3 Interrupt Request Enable High Bit
[6]
U1RENH UART 1 Receive Interrupt Request Enable High Bit
[5]
U1TENH UART 1 Transmit Interrupt Request Enable High Bit
[4]
DMAENH DMA Interrupt Request Enable High Bit
[3]
C3ENH Port C3 Interrupt Request Enable High Bit
[2]
C2ENH Port C2 Interrupt Request Enable High Bit
[1]
C1ENH Port C1 Interrupt Request Enable High Bit
[0]
C0ENH Port C0 Interrupt Request Enable High Bit
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Table 35. IRQ2 Enable Low Bit Register (IRQ2ENL)
Bit 76543210
Field T3ENL U1RENL U1TENL DMAENL C3ENL C2ENL C1ENL C0ENL
RESET 0
R/W R/W
Address FC8H
Bit Description
[7]
T3ENL Timer 3 Interrupt Request Enable Low Bit
[6]
U1RENL UART 1 Receive Interrupt Request Enable Low Bit
[5]
U1TENL UART 1 Transmit Interrupt Request Enable Low Bit
[4]
DMAENL DMA Interrupt Request Enable Low Bit
[3]
C3ENL Port C3 Interrupt Request Enable Low Bit
[2]
C2ENL Port C2 Interrupt Request Enable Low Bit
[1]
C1ENL Port C1 Interrupt Request Enable Low Bit
[0]
C0ENL Port C0 Interrupt Request Enable Low Bit
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Interrupt Edge Select Register
The Interrupt Edge Select (IRQES) Register, shown in Table 36, determines whether an
interrupt is generated for the rising edge or falling edge on the selected GPIO port input
pin. The Interrupt Port Select Register selects between Port A and Port D for the individ-
ual interrupts.
Interrupt Port Select Register
The Port Select (IRQPS) Register, shown in Table 37, determines the port pin that gener-
ates the PAx/PDx interrupts. This register allows either Port A or Port D pins to be used as
interrupts. The Interrupt Edge Select Register controls the ac tive interrupt edge.
Table 36. Interrupt Edge Select Register (IRQES)
Bit 76543210
Field IES7 IES6 IES5 IES4 IES3 IES2 IES1 IES0
RESET 0
R/W R/W
Address FCDH
Bit Description
[7:0]
IESx Interrupt Edge Select x
The minimum pulse width should be greater than 1 system clock to guarantee capture of the
edge triggered interrupt. Shorter pulses may be captured but not guaranteed.
0 = An interrupt request is generated on the falling edge of the PA x/PDx input.
1 = An interrupt request is generated on the rising edge of the PAx/PDx input.
Note: x indicates specific GPIO port pins in the range [7:0].
Table 37. Interrupt Port Select Register (IRQPS)
Bit 76543210
Field PAD7S PAD6S PAD5S PAD4S PAD3S PAD2S PAD1S PAD0S
RESET 0
R/W R/W
Address FCEH
Bit Description
[7:0]
PADxS PAx/PDx Selection
0 = PAx is used for the interrupt for PAx/PDx interrupt request.
1 = PDx is used for the interrupt for PAx/PDx interrupt request.
Note: x indicates specific GPIO port pins in the range [7:0].
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Interrupt Control Register
The Interrupt Control (IRQCTL) Register, shown in Table 38, contains the master enable
bit for all interrupts.
Table 38. Interrupt Control Register (IRQCTL)
Bit 76543210
Field IRQE Reserved
RESET 0
R/W R/W R
Address FCFH
Bit Description
[7]
IRQE Interrupt Request Enable
This bit is set to 1 by execution of an EI or IRET instruction, or by a direct register write of a 1
to this bit. It is reset to 0 by executing a DI instruction, eZ8 CPU acknowledgement of an inter-
rupt request, or a Reset.
0 = Interrupts are disabled.
1 = Interrupts are enabled.
[6:0] Reserved
These pins are reserved and must be programmed to 000000.
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Timers
The Z8 Encore! XP F64xx Series products contain up to four 16-bit reloadable timers that
can be used for timing, event counting or generation of pulse-width modulated signals.
The timers’ features include:
•
16-bit reload counter
•
Programmable prescaler with prescale values from 1 to 128
•
PWM output generation
•
Capture and compare capability
•
External input pin for timer input, clock gating, or capture signal. External input pin
signal frequency is limited to a maximum of one-fourth the system clock frequency.
•
Timer output pin
•
Timer interrupt
In addition to the timers described in this chapter, the baud rate generators for any unused
UART, SPI or I2C peripherals can also be used to provide basic timing functionality. For
information about using the baud rate generators as timers, see the respective serial com-
munication peripheral. Timer 3 is unavailable in the 44-pin package devices.
Architecture
Figure 12 displays the architecture of the timers.
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Operation
The timers are 16-bit up-counters. Minimum time-out delay is set by loading the value
0001H into the Timer Reload High and Low Byte registers and setting the prescale value
to 1. Maximum time-out delay is set by loading the value 0000H into the Timer Reload
High and Low Byte registers and setting the prescale value to 128. If the Timer reaches
FFFFH, the timer rolls over to 0000H and continues counting.
Timer Operating Modes
The timers can be configured to operate in the following modes:
ONE-SHOT Mode
In ONE-SHOT Mode, the timer counts up to the 16-bit reload value stored in the Timer
Reload High and Low Byte registers. The timer input is the system clock. Upon reaching
the reload value, the timer generates an interrupt and the count value in the Timer High
and Low Byte registers is reset to 0001H. Then, the timer is automatically disabled and
stops counting.
Also, if the timer output alternate function is enabled, the timer output pin changes state
for one system clock cycle (from Low to High or from High to Low) upon timer reload. If
Figure 12. Timer Block Diagram
16-Bit
PWM/Compare
16-Bit Counter
with Prescaler
16-Bit
Reload Register
Timer
Control
Compare Compare
Interrupt,
PWM,
and
Timer Output
Control
Timer
Timer
Timer Block
System
Timer
Data
Block
Interrupt
Output
Control
Bus
Clock
Input
Gate
Input
Capture
Input
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it is appropriate to have the timer output make a permanent state change upon a One-Shot
time-out, first set the TPOL bit in the Timer Control 1 Register to the start value before
beginning ONE-SHOT Mode. Then, after starting the timer, set TPOL to the opposite bit
value.
Observe the following procedure for configuring a timer for ONE-SHOT Mode and initi-
ating the count:
1. Write to the Timer Control 1 Register to:
–Disable the timer
–Configure the timer for ONE-SHOT Mode
–Set the prescale value
–If using the timer output alternate function, set the initial output level (High or
Low)
2. Write to the Timer High and Low Byte registers to set the starting count value.
3. Write to the Timer Reload High and Low Byte registers to set the reload value.
4. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
to the relevant interrupt registers.
5. If using the timer output function, configure the associated GPIO port pin for the timer
output alternate function.
6. Write to the Timer Control 1 Register to enable the timer and initiate counting.
In ONE-SHOT Mode, the system clock always provides the timer input. The timer period
is calculated using the following equation:
CONTINUOUS Mode
In CONTINUOUS Mode, the timer counts up to the 16-bit reload value stored in the
Timer Reload High and Low Byte registers. The timer input is the system clock. Upon
reaching the reload value, the timer generates an interrupt, the count value in the Timer
High and Low Byte registers is reset to 0001H and counting resumes. Also, if the timer
output alternate function is enabled, the timer output pin ch anges state (from Low to High
or from High to Low) upon timer reload.
Observe the following procedure for configuring a timer for CONTINUOUS Mode and
initiating the count:
1. Write to the Timer Control 1 Register to:
ONE-SHOT Mode Time-Out Period (s) Reload Value Start Value–Prescale
System Clock Frequency (Hz)
-------------------------------------------------------------------------------------------------=
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–Disable the timer
–Configure the timer for CONTINUOUS Mode
–Set the prescale value
–If using the timer output alternate function, set the initial output level (High or
Low)
2. W rite to the T imer Hi gh and Low Byte registers to set the starting count value (usually
0001H), affecting only the first pass in CONTINUOUS Mode. After the first timer
reload in CONTINUOUS Mode, counting always begins at the reset value of 0001H.
3. Write to the Timer Reload High and Low Byte registers to set the reload value.
4. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
to the relevant interrupt registers.
5. If using the timer output function, configure the associated GPIO port pin for the timer
output alternate function.
6. Write to the Timer Control 1 Register to enable the timer and initiate counting.
In CONTINUOUS Mode, the system clock always provides the timer input. The timer
period is calculated using the following equation:
If an initial starting value other than 0001H is loaded into the Timer High and Low Byte
registers, the ONE-SHOT Mode equation must be used to determine the first time-out
period.
COUNTER Mode
In COUNTER Mode, the timer counts input transitions from a GPIO port pin. The timer
input is taken from the GPIO port pin timer input alternate function. The TPOL bit in the
Timer Control 1 Register selects whether the count occurs on the rising edge or the falling
edge of the timer input signal. In COUNTER Mode, the prescaler is disabled.
The input frequency of the timer input signal must not exceed one-fourth the system
clock frequency.
Upon reaching the reload value stored in the Timer Reload High and Low Byte registers,
the timer generates an interrupt, the count value in the Timer High and Low Byte registers
is reset to 0001H and counting resumes. Also, if the timer output alternate function is
CONTINUOUS Mode Time-Out Period (s) Reload Value Prescale
System Clock Frequency (Hz)
------------------------------------------------------------------------=
Caution:
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enabled, the timer output pin changes state (from Low to High or from High to Low) at
timer reload.
Observe the following procedure for configuring a timer for COUNTER Mode and initiat-
ing the count:
1. Write to the Timer Control 1 Register to:
–Disable the timer.
–Configure the timer for COUNTER Mode.
–Select either the rising edge or falling edge of the timer input signal for the count.
This also sets the initial logic level (High or Low) for the tim er output alternate
function. However, the timer output function does not have to be enabled.
2. Write to the Timer High and Low Byte registers to set the starting count value. This
only affects the first pass in COUNTER Mode. After the first timer reload in COUN-
TER Mode, counting always begins at the reset value of 0001H. Generally, in COUN-
TER Mode the Timer High and Low Byte registers must be written with the value
0001H.
3. Write to the Timer Reload High and Low Byte registers to set the reload value.
4. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
to the relevant interrupt registers.
5. Configure the associated GPIO port pin for the timer input alternate function.
6. If using the timer output function, configure the associated GPIO port pin for the timer
output alternate function.
7. Write to the Timer Control 1 Register to enable the timer.
In COUNTER Mode, the number of timer input transitions since the timer start is calcu-
lated using the following equation:
PWM Mode
In PWM Mode, the timer outputs a Pulse-Width Modulator (PWM) output sign al th roug h
a GPIO port pin. The timer input is the system clock. The timer first counts up to the 16-
bit PWM match value stored in the Timer PWM High and Low Byte registers. When the
timer count value matches the PWM value, the timer output toggles. The timer continues
counting until it reaches the reload value stored in the Timer Reload High and Low Byte
registers. Upon reaching the reload value, the timer generates an interrupt, the count value
in the Timer High and Low Byte registers is reset to 0001H and counting resumes.
COUNTER Mode Timer Input Transitions Current Count Value Start Value–=
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If the TPOL bit in the Timer Control 1 Register is set to 1, the timer output signal begins
as a High (1) and then transitions to a Low (0) when the timer value matches the PWM
value. The timer output signal returns to a High (1) after the timer reaches the reload value
and is reset to 0001H.
If the TPOL bit in the Timer Control 1 Register is set to 0, the timer output signal begins
as a Low (0) and then transitions to a High (1) when the timer value matches the PWM
value. The timer output signal returns to a Low (0) after the timer reaches the reload value
and is reset to 0001h.
Observe the following procedure for configuring a timer for PWM Mode and initiating the
PWM operation:
1. Write to the Timer Control 1 Register to:
–Disable the timer
–Configure the timer for PWM Mode
–Set the prescale value
–Set the initial logic level (High or Low) and PWM High/Low transition for the
timer output alternate function
2. Write to the Timer High and Low Byte registers to set the starting count value (typi-
cally 0001H). This only af fects the first pass in PWM Mode. After the first timer reset
in PWM Mode, counting always begins at the reset value of 0001H.
3. Write to the PWM High and Low Byte registers to set the PWM value.
4. Write to the Timer Reload High and Low Byte registers to set the reload value (PWM
period). The reload value must be greater than the PWM value.
5. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
to the relevant interrupt registers.
6. Configure the associated GPIO port pin for the timer output alternate function.
7. Write to the Timer Control 1 Register to enable the timer and initiate counting.
The PWM period is calculated using the following equation:
If an initial starting value other than 0001H is loaded into the Timer High and Low Byte
registers, the ONE-SHOT Mode equation must be used to determine the first PWM time-
out period.
PWM Period (s) Reload Value Prescale
System Clock Frequency (Hz)
------------------------------------------------------------------------=
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If TPOL is set to 0, the ratio of the PWM output High time t o the t otal period is calculated
using the following equation:
If TPOL is set to 1, the ratio of the PWM output High time t o the t otal period is calculated
using the following equation:
CAPTURE Mode
In CAPTURE Mode, the current timer count valu e is recorded when the appropriate exter-
nal timer input transition occurs. The Capture count value is written to the Timer PWM
High and Low Byte Registers. The timer input is the system clock. The TPOL bit in the
Timer Control 1 Register determines if the Capture occurs on a rising edge or a falling
edge of the timer input signal. When the capture event occurs, an interrupt is generated
and the timer continues counting.
The timer continues counting up to the 16-bit reload value stored in the Timer Reload
High and Low Byte registers. Upon reaching the reload value, the timer generates an inter-
rupt and continues counting.
Observe the following procedure for configuring a timer for CAPTURE Mode and initiat-
ing the count:
1. Write to the Timer Control 1 Register to:
–Disable the timer
–Configure the timer for CAPTURE Mode
–Set the prescale value
–Set the Capture edge (rising or falling) for the timer input
2. Write to the Timer High and Low Byte registers to set the starting count value (typi-
cally 0001H).
3. Write to the Timer Reload High and Low Byte registers to set the reload value.
4. Clear the Timer PWM High and Low Byte registers to 0000H. This allows the soft-
ware to determine if interrupts were generated by either a capture event or a reload. If
the PWM High and Low Byte registers still contain 0000H after the interrupt, then the
interrupt was generated by a reload.
5. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
to the relevant interrupt registers.
PWM Output High Time Ratio (%) Reload Value PWM Value–
Reload Value
---------------------------------------------------------------------100=
PWM Output High Time Ratio (%) PWM Value
Reload Value
-------------------------------- 100=
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6. Configure the associated GPIO port pin for the timer input alternate function.
7. Write to the Timer Control 1 Register to enable the timer and initiate counting.
In CAPTURE Mode, the elapsed time from timer start to capture event can be calculated
using the following equation:
COMPARE Mode
In COMPARE Mode, the timer counts up to the 16-bit maximum compare value stored in
the Timer Reload High and Low Byte register s. The timer input is the system clock. Upon
reaching the compare value, the timer generates an interrupt and counting continues (the
timer value is not reset to 0001H). Also, if the timer output alternate function is enabled,
the timer output pin changes state (from Low to High or from High to Low) upon com-
pare.
If the Timer reaches FFFFH, the timer rolls over to 0000H and continue counting.
Observe the following procedure for configuring a timer for COMPARE Mode and initiat-
ing the count:
1. Write to the Timer Control 1 Register to:
–Disable the timer
–Configure the timer for COMPARE Mode
–Set the prescale value
–Set the initial logic level (High or Low) for the timer output alternate function, if
appropriate
2. Write to the Timer High and Low Byte registers to set the starting count value.
3. Write to the Timer Reload High and Low Byte registers to set the compare value.
4. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
to the relevant interrupt registers.
5. If using the timer output function, configure the associated GPIO port pin for the timer
output alternate function.
6. Write to the Timer Control 1 Register to enable the timer and initiate counting.
In COMPARE Mode, the system clock always provides the timer input. The compare time
is calculated using the following equation:
Capture Elapsed Time (s) Capture Value Start Value–Prescale
System Clock Frequency (Hz)
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GATED Mode
In GATED Mode, the timer counts only when the timer input signal is in its active state
(asserted), as determined by the TPOL bit in the Timer Control 1 Register . When the t imer
input signal is asserted, counting begins. A timer interrupt is generated when the timer
input signal is deasserted or a timer reload occurs. To determine if a timer input signal
deassertion generated the interrupt, read the associated GPIO input value and compare to
the value stored in the TPOL bit.
The timer counts up to the 16-bit reload value stored in the Timer Reload High and Low
Byte registers. The timer input is the system clock. When reaching the reload value, the
timer generates an interrupt, the count value in the Timer High and Low Byte registers is
reset to 0001H and counting resumes (assuming the timer input signal is still asserted).
Also, if the timer output alternate function is enabled, the timer output pin changes state
(from Low to High or from High to Low) at timer reset.
Observe the following procedure for configuring a timer for GATED Mode and initiating
the count:
1. Write to the Timer Control 1 Register to:
–Disable the timer
–Configure the timer for GATED Mode
–Set the prescale value
2. Write to the Timer High and Low Byte registers to set the starting count value. This
only affects the first pass in GATED Mode. After the first timer reset in GATED
Mode, counting always begins at the reset value of 0001H.
3. Write to the Timer Reload High and Low Byte registers to set the reload value.
4. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
to the relevant interrupt registers.
5. Configure the associated GPIO port pin for the timer input alternate function.
6. Write to the Timer Control 1 Register to enable the timer.
7. Assert the timer input signal to initiate the counting.
CAPTURE/COMPARE Mode
In CAPTURE/COMPARE Mode, the timer begins counting on the first external timer
input transition. The appropriate transition (rising edge or falling edge) is set by the TP OL
bit in the Timer Control 1 Register. The timer input is the system clock.
COMPARE Mode Time (s) Compare Value Start Value–Prescale
System Clock Frequency (Hz)
------------------------------------------------------------------------------------------------------=
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Every subsequent appropriate transition (after the first) of the timer input signal captures
the current count value. The Capture value is written to the Timer PWM High and Low
Byte Registers. When the capture event occurs, an interrupt is generated, the count value
in the Timer High and Low Byte registers is reset to 0001H, and counting resumes.
If no capture event occurs, the timer counts up to the 16-bit compare value stored in the
Timer Reload High and Low Byte registers. Upon reaching the compare value, the timer
generates an interrupt, the count value in the T imer High and Low Byte registers is reset to
0001H and counting resumes.
Observe the following procedure for configuring a timer for CAPTURE/COMPARE
Mode and initiating the count:
1. Write to the Timer Control 1 Register to:
–Disable the timer
–Configure the timer for CAPTURE/COMPARE Mode
–Set the prescale value
–Set the Capture edge (rising or falling) for the timer input
2. Write to the Timer High and Low Byte registers to set the starting count value (typi-
cally 0001H).
3. Write to the Timer Reload High and Low Byte registers to set the compare value.
4. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
to the relevant interrupt registers.
5. Configure the associated GPIO port pin for the timer input alternate function.
6. Write to the Timer Control 1 Register to enable the timer.
7. Counting begins on the first appropriate transition of the timer input signal. No inter-
rupt is generated by this first edge.
In COMPARE Mode, the elapsed time from timer start to capture event can be calculated
using the following equation:
Reading the Timer Count Values
The current count value in the timers can be read while counting (enabled). This capability
has no effect on timer operation. When the timer is enabled and the Timer High Byte Reg-
ister is read, the contents of the Timer Low Byte Register are placed in a holding register.
A subsequent read from the Timer Low Byte Register returns the value in the holding reg-
Capture Elapsed Time (s) Capture Value Start Value–Prescale
System Clock Frequency (Hz)
---------------------------------------------------------------------------------------------------
=
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ister. This operation allows accurate reads of the full 16-bit timer count value while
enabled. When the timers are not enabled, a read from the Timer Low Byte Register
returns the actual value in the counter.
Timer Output Signal Operation
A timer output is a GPIO port pin alternate function. Generally, the timer output is toggled
every time the counter is reloaded.
Timer Control Register Definitions
This section defines the features of the following Timer Control registers.
Timer 0–3 High and Low Byte Registers: see page 72
Timer Reload High and Low Byte Registers: see page 74
Timer 0–3 P WM High and Low Byte Registers: see page 75
Timer 0–3 Control 0 Registers: see page 76
Timer 0–3 Control 1 Registers: see page 77
Timers 0–2 are available in all packages. Time r 3 is only available in 64-, 68- and 80-pin
packages.
Timer 0–3 High and Low Byte Registers
The Timer 0–3 High and Low Byte (TxH and TxL) registers, shown in Tables 39 and 40,
contain the current 16-bit timer count value. When the timer is enabled, a read from TxH
causes the value in TxL to be stored in a temporary holding register. A read from TMRL
always returns this temporary register when the timers are enabled. When the timer is dis-
abled, reads from the TMRL read the register directly.
Writing to the Timer High and Low Byte registers while the timer is enabled is not recom-
mended. There are no temporary holding registers available for write operations, so simul-
taneous 16-bit writes are not possible. If either the Timer High or Low Byte registers are
written during counting, the 8-bit written value is placed in the counter (High or Low
Byte) at the next clock edge. The counter continues counting from the new value.
Timer 3 is unavailable in 44-pin packages.
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Table 39. Ti mer 0–3 High Byte Register (TxH)
Bit 76543210
Field TH
RESET 0
R/W R/W
Address F00H, F08H, F10H, F18H
Table 40. Timer 0–3 Low Byte Register (TxL)
Bit 76543210
Field TL
RESET 01
R/W R/W
Address F01H, F09H, F11H, F19H
Bit Description
[7:0]
TH, TL Timer High and Low Bytes
These 2 bytes, {TMRH[7:0], TMRL[7:0]}, contain the current 16-bit timer count value.
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Timer Reload High and Low Byte Registers
The Timer 0–3 Reload High and Low Byte (TxRH and TxRL) registers, shown in
Tables 41 and 42, store a 16-bit reload value, {TRH[7:0], TRL[7:0]}. Values written to the
T imer Reload High Byte Register are stored in a temporary holding register. When a write
to the Timer Reload Low Byte Register occurs, the temporary holding register value is
written to the Timer High Byte Register. This operation allows simultaneous updates of
the 16-bit timer reload value.
In COMPARE Mode, the T imer Reload High and Low Byte registers store the 16-bit com-
pare value.
Table 41. Ti mer 0–3 Reload High Byte Register (TxRH)
Bit 76543210
Field TRH
RESET 1
R/W R/W
Address F02H, F0AH, F12H, F1AH
Table 42. Timer 0–3 Reload Low Byte Register (TxRL)
Bit 76543210
Field TRL
RESET 1
R/W R/W
Address F03H, F0BH, F13H, F1BH
Bit Description
[7:0]
TRH,
TRL
Timer Reload Register High and Low
These two bytes form the 16-bit reload value, {TRH[7:0], TRL[7:0]}. This value sets the maxi-
mum count value which initiates a timer reload to 0001H. In COMPARE Mode, these two bytes
form the 16-bit compare value.
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Timer 0–3 PWM High and Low Byte Registers
The Timer 0–3 PWM High and Low Byte (TxPWMH and TxPWML) registers, shown in
Tables 43 and 44, are used for Pulse-W idth Modulator (PWM) oper ations. These registers
also store the capture values for the CAPTURE and CAPTURE/COMPARE modes.
Table 43. Timer 0–3 PWM High Byte Re gi st er (T xP WM H)
Bit 76543210
Field PWMH
RESET 0
R/W R/W
Address F04H, F0CH, F14H, F1CH
Table 44. Timer 0–3 PWM Low Byte Register (TxPWML)
Bit 76543210
Field PWML
RESET 0
R/W R/W
Address F05H, F0DH, F15H, F1DH
Bit Description
[7:0]
PWMH,
PWML
Pulse-Width Modulator High and Low Bytes
These two bytes, {PWMH[7:0], PWML[7:0]}, form a 16-bit value that is compared to the current
16-bit timer count. When a match occurs, the PWM output changes state. The PWM output
value is set by the TPOL bit in the Timer Control 1 Register (TxCTL1) Register. The TxPWMH
and TxPWML registers also sto re the 16-bit captur ed timer value when oper ating in CAPTURE
or CAPTURE/COMPARE modes.
PS019924-0113 PREL I M I N A R Y Timer Contr ol Register Definitions
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Timer 0–3 Control 0 Registers
The T imer 0–3 C ontrol 0 (TxCTL0) registers, sho wn in Tables 45 and 46, allow cascading
of the timers.
Table 45. Ti mer 0–3 Control 0 Register (TxCTL0)
Bit 76543210
Field Reserved CSC Reserved
RESET 0
R/W R/W
Address F06H, F0EH, F16H, F1EH
Bit Description
[7:5] Reserved
These bits are reserved and must be programmed to 000.
[4]
CSC Cascade Timers
0 = Timer input signal comes from the pin.
1 = For Timer 0, the input signal is connected to Timer 3 output.
For Timer 1, the input signal is connected to the Timer 0 output.
For Timer 2, the input signal is connected to the Timer 1 output.
For Timer 3, the input signal is connected to the Timer 2 output.
[3:0] Reserved
These bits are reserved and must be programmed to 0000.
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Timer 0–3 Control 1 Registers
The Timer 0–3 Control 1 (TxCTL1) registers enable/disable the timers, set the prescaler
value, and determine the timer operating mode.
Table 46. Ti mer 0–3 Control 1 Register (TxCTL1)
Bit 76543210
Field TEN TPOL PRES TMODE
RESET 0
R/W R/W
Address F07H, F0FH, F17H, F1FH
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Bit Description
[7]
TEN Timer Enable
0 = Timer is disabled.
1 = Timer enabled to count.
[6]
TPOL Timer Input/Output Polarity
Operation of this bit is a function of the current operating mode of the timer.
ONE-SHOT Mode
When the timer is disable d, the timer output sig nal is set to the value of this bit. When the timer
is enabled, the timer output signal is complemented upon ti me r re loa d .
CONTINUOUS Mode
When the timer is disable d, the timer output sig nal is set to the value of this bit. When the timer
is enabled, the timer output signal is complemented upon ti me r re loa d .
COUNTER Mode
When the timer is disable d, the timer output sig nal is set to the value of this bit. When the timer
is enabled, the timer output signal is complemented upon ti me r re loa d .
0 = Count occurs on the rising edge of the timer input signal.
1 = Count occurs on the falling edge of the timer input signal.
PWM Mode
0 = timer ou tput is forced Low (0) whe n the timer is disabled. When enabled, the timer output is
forced High (1) upon PWM count match and forced Low (0) upon reload.
1 = timer output is forced High (1) when the timer is disabled. When enabled, the timer output
is forced Low (0) upon PWM count match and forced High (1) upon reload.
CAPTURE Mode
0 = Count is captured on the rising edge of the timer input signal.
1 = Count is captured on the falling edge of the timer input signal.
COMPARE Mode
When the timer is disable d, the timer output sig nal is set to the value of this bit. When the timer
is enabled, the timer output signal is complemented upon ti me r re loa d .
GATED Mode
0 = Timer counts when the time r input signal is High (1) and interrupts are generated on the
falling edge of the timer input.
1 = Timer counts when the timer input sig nal is L ow ( 0) a nd inter rupts are generated on th e ri s-
ing edge of the timer inpu t.
CAPTURE/COMPARE Mode
0 = Counting is started on the first rising edge of the timer input signal. The current count is
captured on subsequent rising edges of the timer input signal.
1 = Counting is started on the first falling edge of the timer input signal. The current count is
captured on subsequent falling edges of the timer input signal.
Caution: When the timer output alternate function TxOUT on a GPIO port pin is enabled,
TxOUT will change to whatever state the TPOL bit is in. The timer does not need to be enabled
for that to happen. Also, the Port Data Direction Subregister is not needed to be set to output
on TxOUT. Changing the TPOL bit with the timer enabled and running does not immedi ately
change the TxOUT.
PS019924-0113 PREL I M I N A R Y Timer Contr ol Register Definitions
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Product Specification
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[5:3]
PRES Prescale Value
The timer input clock is divided by 2PRES, where PRES can be se t from 0 to 7. The prescaler is
reset each time the timer is disabled to ensure proper clock division each time the timer is
restarted.
000 = Divide by 1.
001 = Divide by 2.
010 = Divide by 4.
011 = Divide by 8.
100 = Divide by 16.
101 = Divide by 32.
110 = Divide by 64.
111 = Divide by 128.
[2:0]
TMODE TIMER Mode
000 = ONE-SHOT Mode.
001 = CONTINUOUS Mode.
010 = COUNTER Mode.
011 = PWM Mode.
100 = CAPTURE Mode.
101 = COMPARE Mode.
110 = GATED Mode.
111 = CAPTURE/COMPARE Mode.
Bit Description (Continued)
PS019924-0113 PR E L I MINARY Watchdog Timer
Z8 Encore! XP® F64xx Series
Product Specification
80
Watchdog Timer
The Watchdog Timer (WDT) helps protect against corrupt or unreliable software, power
faults and other system-level problems which can place the Z8 Encore! XP F64xx Series
MCU into unsuitable operating states. The features of the Watchdog Timer include:
•
On-chip RC oscillator
•
A selectable time-out response
•
WDT time-out response: Reset or interrupt
•
24-bit programmable time-out value
Operation
The Watchdog Timer is a retriggerable one-shot timer that resets or interrupts the Z8
Encore! XP F64xx Series devices when the WDT reaches its terminal coun t. The Watch-
dog T imer uses its own dedicated on-chip RC oscillator as its clock source. The Watchdog
Timer has only two modes of operation: ON and OFF. After it is enabled, it always counts
and must be refreshed to prevent a time-out. An enable can be performed by executing the
WDT instruction or by setting the WDT_AO option bit. This WDT_AO bit enables the
Watchdog Timer to operate continuously, even if a WDT instruction has not been exe-
cuted.
The Watchdog Timer is a 24-bit reloadable downcounter that uses three 8-bit registers in
the eZ8 CPU register space to set the reload value. The nominal WDT time-out period is
calculated using the following equation:
In the above equation, the WDT reload value is the decimal value of the 24-bit value pro-
vided by {WDTU[7:0], WDTH[7:0 ], WDTL[7:0 ]}; the typical Watchdog Timer RC oscil-
lator frequency is 10 kHz. The Watchdog Timer cannot be refreshed after it reaches
000002H. The WDT reload value must not be set to values below 000004H.
Table 47 lists approximate time-out delays for the minimum and maximum WDT reload
values.
WDT Time-out Period (ms) WDT Reload Value
10
------------------------------------------------
=
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Watchdog Timer Refresh
When first enabled, the Watchdog Timer is loaded with the value in the Watchdog Timer
Reload registers. The Watchdog Timer then counts down to 000000H unless a WDT
instruction is executed by the eZ8 CPU. Execution of the WDT instruction causes the
downcounter to be reloaded with the WDT reload value stored in the Watchdog Timer
Reload registers. Counting resumes following the reload operation.
When the Z8 Encore! XP F64xx Series devices are operating in DEBUG Mode (through
the On-Chip Debugger), the Watchdog Timer is continuously refreshed to prevent spuri-
ous Watchdog Timer time-outs.
Watchdog Timer Time-Out Response
The Watchdog Timer times out when the counter reaches 000000H. A time-out of the
Watchdog Timer generates either an interrupt or a Reset. The WDT_RES option bit deter-
mines the time-out response of the Watchdog Timer. For information about progra mming
of the WDT_RES option bit, see the Option Bits chapter on page 180.
WDT Interrupt in Normal Operation
If configured to generate an interrupt when a time-out occurs, the Watchdog Timer issues
an interrupt request to the interrupt controller and sets the WDT status bit in the Watchdog
Timer Control Register. If interrupts are enabled, the eZ8 CPU responds to the interrupt
request by fetching the Watchdog T imer interrupt vector and executing code from the vec-
tor address. After time-out and interrupt generation, the Watchdog Timer counter rolls
over to its maximum value of FFFFFH and continues counting. The Watchdog Timer
counter is not automatically returned to its reload value.
WDT Interrupt in STOP Mode
If configured to generate an interrupt when a time-out occurs and the Z8 Encore! XP
F64xx Series devices are in STOP Mode, the Watchdog Timer automatically initiates a
Stop Mode Recovery and generates an interrupt request. Both the WDT status bit and the
stop bit in the Watchdog Timer Control Register are set to 1 following WDT time-out in
Table 47. Watchdog Timer Approximate Time-Out Delays
WDT Reload
Value
(Hex)
WDT Reload
Value
(Decimal)
Approximate Time-Out Delay
(with 10 kHz typical WDT Oscillator Frequency)
Typical Description
000004 4 400 µs Minimum time-out delay
FFFFFF 16,777,215 1677.5 s Maximum time-out delay
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STOP Mode. For more information about Stop Mode Recovery, see the Reset and Stop
Mode Recovery chapter on page 28.
If interrupts are enabled, following completion of the Stop Mode Recovery the eZ8 CPU
responds to the interrupt request by fetching the Watchdog Timer interrupt vector and exe-
cuting code from the vector address.
WDT Reset in Normal Operation
If configured to generate a Reset when a time-out occurs, the Watchdog Timer forces the
device into the Reset state. The WDT status bit in the Watchdog T imer Control Register is
set to 1. For more information about Reset, see the Reset and Stop Mode Recovery chapter
on page 28.
WDT Reset in STOP Mode
If enabled in STOP Mode and configured to generate a Reset when a time-out occurs and
the device is in STOP Mode, the Watchdog Timer initiates a Stop Mode Recovery. Both
the WDT status bit and the stop bit in the Watchdog Timer Control Register are set to 1
following WDT time-out in STOP Mode. Default operation is for the WDT and its RC
oscillator to be enabled during STOP Mode.
WDT RC Disable in STOP Mode
To minimize power consumption in STOP Mode, the WDT and its RC oscillator can be
disabled in STOP Mode. The following sequence configures th e WDT to be disabled
when the Z8 Encore! XP F64xx Series devices enter STOP Mode following execution of a
stop instruction:
1. Write 55H to the Watchdog Timer Control Register (WDTCTL).
2. Write AAH to the Watchdog Timer Control Register (WDTCTL).
3. Write 81H to the Watchdog T imer Control Register (WDTCTL) to configure the WDT
and its oscillator to be disabled during STOP Mode. Alternatively, write 00H to the
Watchd og Timer Control Register (WDTCTL) as the third step in this sequence to
reconfigure the WDT and its oscillator to be enabled during STOP Mode.
This sequence only affects WDT operation in STOP Mode.
Watchdog Timer Reload Unlock Sequence
W riting the unlock sequence to the Watchdog T imer (WDTCTL) Control Register address
unlocks the three Watchdog T imer Reload Byte registers (WDTU, WDTH, and WDTL) to
allow changes to the time-out period. These write operations to the WDTCTL Register
address produce no effect on the bits in the WDTCTL Register. The locking mechanism
prevents spurious writes to the Reload registers. Observe the following procedure to
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Product Specification
83
unlock the Watchdog T imer Reload Byte registers (WDTU, WDTH, and WDTL) for write
access.
1. Write 55H to the Watchdog Timer Control Register (WDTCTL).
2. Write AAH to the Watchdog Timer Control Register (WDTCTL).
3. Write the Watchdog Timer Reload Upper Byte Register (WDTU).
4. Write the Watchdog Timer Reload High Byte Register (WDTH).
5. Write the Watchdog Timer Reload Low Byte Register (WDTL).
All steps of the Watchdog Timer reload unlock sequence must be written in the sequence
described above; there must be no other register writes between each of these operations.
If a register write occurs, the lock state machine resets and no further writes can occur,
unless the sequence is restarted. The value in the Watchdog Timer Reload registers is
loaded into the counter when the Watchdog Time r is first enabled and every time a WDT
instruction is executed.
Watchdog Timer Control Register Definitions
This section defines the features of the following Watchdog Timer Control registers.
Watchdog Timer Control Register: see page 83
Watchdog Timer Reload Upper, High and Low Byte Registers: see page 85
Watchdog Timer Control Register
The Watchdog Timer Control (WDTCTL) Register, shown in Table 48, is a read-only reg-
ister that indicates the source of the most recent Reset event, indicates a Stop Mode
Recovery event, and indicates a Watchdog T imer time-out. Reading this register resets the
upper four bits to 0.
Writing the 55H, AAH unlock sequence to the Watchdog Timer Control (WDTCTL) Regis-
ter address unlocks the three Watchdog T imer Reload Byte registers (WDTU, WDTH, and
WDTL) to allow changes to the time-out period. These write operations to the WDTCTL
Register address produce no effect on the bits in the WDTCTL Register. The locking
mechanism prevents spurious writes to the Reload registers.
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Table 48. Watchdog Timer Control Register (WDTCTL)
Bit 76543210
Field POR STOP WDT EXT Reserved SM
RESET See Table 49. 0
R/W R
Address FF0H
Bit Description
[7]
POR Power-On Reset Indicator
If this bit is set to 1, a Power-On Reset event occurred. This bit is reset to 0 if a WDT time-out
or Stop Mode Recove ry occurs. This bit is also reset to 0 when the register is read.
[6]
STOP Stop Mode Recovery Indicator
If this bit is set to 1, a Stop Mode Recovery occurred. If the sto p and WDT bi ts are both set to
1, the Stop Mode Recovery occurred due to a WDT time-out. If the stop bit is 1 and the WDT
bit is 0, the Stop Mode Recovery was not caused by a WDT time-out. This bit is reset by a
Power-On Reset or a WDT time-out that occurr ed while not in ST OP Mode. Reading this regis-
ter also resets this bit.
[5]
WDT Watchdog Timer Time-Out Indicator
If this bit is set to 1, a WDT time-out occurred. A Power-On Reset resets this pin. A S top Mode
Recovery from a change in an input pin also reset s this bit. Reading this register resets this bit.
[4]
EXT External Reset Ind ic ator
If this bit is set to 1, a Reset initiated by the external RESET pin occurred. A Power-On Reset
or a Stop Mode Recovery from a change in an input pin resets this bit. Reading this register
resets this bit.
[3:1] Reserved
These bits are reserved and must be programmed to 000.
[0]
SM STOP Mode Configuration Indicator
0 = Watchdog Timer and its internal RC oscillator will continue to operate in STOP Mode.
1 = Watchdog Timer and its internal RC oscillator will be disabled in STOP Mode.
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Watchdog Timer Reload Upper, High and Low Byte Registers
The Watchdog Timer Reload Upper, High and Low Byte (WDTU, WDTH, WDTL) regis-
ters, shown in Tables 50 through 52, form the 24-bit reload value that is loaded into the
Watchdog Timer when a WDT instruction executes. The 24-bit reload value is
{WDTU[7:0], WDTH[7:0], WDTL[7:0]}. Writing to these registers sets the appropriate
reload value. Reading from these registers returns the current Watchdog Timer co un t
value.
The 24-bit WDT reload value must not be set to a value less than 000004H.
Table 49. Watchdog Timer Events
Reset or Stop Mode Recovery Event POR STOP WDT EXT
Power-On Reset 1000
Reset using RESET pin assertion 0001
Reset using Watchdog Timer time-out 0010
Reset using the On-Chip Debugger (OCDCTL[1] set to 1)1000
Reset from STOP Mode using DBG Pin driven Low 1000
Stop Mode Recovery using GPIO pin transition 0100
Stop Mode Recovery using Watchdog Timer time-out 0110
Table 50. Watchdog Timer Reload Upper Byte Register (WDTU)
Bit 76543210
Field WDTU
RESET 1
R/W R/W*
Address FF1H
Note: *R/W = Read returns the current WDT count value; write sets the appropriate reload value.
Bit Description
[7:0]
WDTU WDT Reload Upper Byte
Most significant byte, bits[23:16] of the 24-bit WDT reload value.
Caution:
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Table 51. Watchdog Timer Reload High Byte Register (WDTH)
Bit 76543210
Field WDTH
RESET 1
R/W R/W*
Address FF2H
Note: *R/W = Read returns the current WDT count value; write sets the appropriate reload value.
Bit Description
[7:0]
WDTH WDT Reload High Byte
Middle byte, bits[15:8] of the 24-bit WDT reload value.
Table 52. Watchdog Timer Reload Low Byte Register (WDTL)
Bit 76543210
Field WDTL
RESET 1
R/W R/W*
Address FF3H
Note: *R/W = Read returns the current WDT count value; write sets the appropriate reload value.
Bit Description
[7:0]
WDTL WDT Reload Low
Least significant byte, bits[7:0] of the 24-bit WDT reload value.
PS019924-0113 PR E L I M I NARY Universal Asynchronous Receiver/
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Product Specification
87
Universal Asynchronous Receiver/
Transmitter
The Universal Asynchronous Receiver/Transmitter (UART) is a full-duplex communica-
tion channel capable of handling asynchronous data transfers. The UART uses a single
8-bit data mode with selectable parity. Features of the UART include:
•
8-bit asynchronous data transfer
•
Selectable even- and odd-parity generation and checking
•
Option of one or two stop bits
•
Separate transmit and receive interrupts
•
Framing, parity, overrun and break detection
•
Separate transmit and receive enables
•
16-bit Baud Rate Generator (BRG)
•
Selectable MULTIPROCESSOR (9-Bit) Mode with three configurable interrupt
schemes
•
Baud Rate Generator timer mode
•
Driver Enable output for external bus transceivers
Architecture
The UART consists of three primary functional blocks: Transmitter, Receiver and Baud
Rate Generator. The UART’s transmitter and receiver function independently, but employ
the same baud rate and data format. Figure 13 displays the UART architecture.
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Operation
The UART always transmits and receives data in an 8-bit data format, least significant bit
first. An even or odd parity bit can be optionally added to the data stream. Each character
begins with an active Low start bit and ends with either 1 or 2 active High stop bits.
Figures 14 and 15 display the asynchronous data format employed by the UART without
parity and with parity, respectively.
Figure 13. UART Block Diagram
Receive Shif te r
Receive Data
Transmit Data
Transmit Shift
TxD
RxD
System Bus
Parity Checker
Parity Generator
Receiver Control
Control Registers
Transmitter Control
CTS
Status Register
Register
Register
Register
Baud Rate
Generator
DE
with address compare
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Transmitting Data using the Polled Method
Observe the following procedure to transmit data using the polled method of operation:
1. W rite to the UART Baud Rate High and Low Byte registers to set the appropriate baud
rate.
2. Enable the UART pin functions by configuring the associated GPIO port pins for
alternate function operation.
3. If MULTIPROCESSOR Mode is appropriate, write to the UAR T Control 1 Register to
enable MULTIPROCESSOR (9-Bit) Mode functions.
–Set the MULTIPROCESSOR Mode Select (MPEN) to Enable MULTIPROCES-
SOR Mode
4. Write to the UART Control 0 Register to:
–Set the transmit enable bit (TEN) to enable the UART for data transmission
–If parity is appropriate and MULTIPROCESSOR Mode is not enabled, set the par-
ity enable bit (PEN) and select either Even or Odd parity (PSEL)
Figure 14. UART Asynchronous Data Format without Parity
Figure 15. UART Asynchronous Data For mat with Parity
Start Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7
Data Field
lsb msb
Idle State
of Line
Stop Bit(s)
1
2
1
0
Start Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Parity
Data Field
lsb msb
Idle State
of Line
Stop Bit(s)
1
2
1
0
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–Set or clear the CTSE bit to enable or disable control from the remote receiver
using the CTS pin
5. Check the TDRE bit in the UART Status 0 Register to determine if the Transmit Data
Register is empty (indicated by a 1). If empty, continue to Step 6. If the T ransmit Data
Register is full (indicated by a 0), continue to monitor the TDRE bit until t he T ransmit
Data Register becomes available to receive new data.
6. Write the UART Control 1 Register to select the outgoing address bit.
7. Set the MULTIPROCESSOR Bit Transmitter (MPBT) if sending an address byte;
clear it if sending a data byte.
8. Write the data byte to the UART Transmit Data Register. The transmitter automati-
cally transfers the data to the Transmit Shift Register and transmits the data.
9. If appropriate and MULTIPROCESSOR Mode is enabled, make any changes to the
MULTIPROCESSOR Bit Transmitter (MPBT) value.
10. To transmit additional bytes, return to Step 5.
Transmitting Data using the Interrupt-Driven Method
The UART transmitter interrupt indicates the availability of the Transmit Data Register to
accept new data for transmission. Observe the following procedure to configure the UAR T
for interrupt-driven data transmission:
1. W rite to the UART Baud Rate High and Low Byte registers to set the appropriate baud
rate.
2. Enable the UART pin functions by configuring the associated GPIO port pins for
alternate function operation.
3. Execute a DI instruction to disable interrupts.
4. Write to the Interrupt control registers to enable the UART Transmitter interrupt and
set the appropriate priority.
5. If MULTIPROCESSOR Mode is appropriate, write to the UAR T Control 1 Register to
enable MULTIPROCESSOR (9-Bit) Mode functions.
6. Set the MULTIPROCESSOR Mode Select (MPEN) to Enable MULTIPROCESSOR
Mode.
7. Write to the UART Control 0 Register to:
–Set the transmit enable bit (TEN) to enable the UART for data transmission
–Enable parity, if appropriate and if MULTIPROCESSOR Mode is not enabled,
and select either even or odd parity
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–Set or clear the CTSE bit to enable or disable control from the remote receiver via
the CTS pin
8. Execute an EI instruction to enable interrupts.
The UART is now configured for interrupt-driven data transmis sion. Because the UART
Transmit Data Register is empty, an interrupt is generated immediately. When the UART
transmit interrupt is detected, the associated interrupt service routine performs the follow-
ing functions:
1. Write the UART Control 1 Register to select the outgoing address bit:
–Set the MULTIPROCESSOR Bit Transmitter (MPBT) if sending an address byte;
clear it if sending a data byte.
2. Write the data byte to the UART Transmit Data Register. The transmitter automati-
cally transfers the data to the Transmit Shift Register and transmits the data.
3. Clear the UART transmit interrupt bit in the applicable Interrupt Request Register.
4. Execute the IRET instruction to return from the interrupt service routine and wait for
the T ransmit Data Register to again become empty.
Receiving Data using the Polled Method
Observe the following procedure to configure the UART for polled data reception:
1. W rite to the UART Baud Rate High and Low Byte registers to set the appropriate baud
rate.
2. Enable the UART pin functions by configuring the associated GPIO port pins for
alternate function operation.
3. Write to the UART Control 1 Register to enable MULTIPROCESSOR Mode func-
tions, if appropriate.
4. Write to the UART Control 0 Register to:
–Set the receive enable bit (REN) to enable the UART for data reception
–Enable parity, if appropriate and if MULTIPROCESSOR Mode is not enabled,
and select either even or odd parity
5. Check the RDA bit in the UART Status 0 Register to determine if the Receive Data
Register contains a valid data byte (indicated by a 1). If RDA is set to 1 to indicate
available data, continue to Step 6. If the Receive Data Register is empt y (indicated by
a 0), continue to monitor the RDA bit awaiting reception of the valid data.
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6. Read data from the UART Receive Data Register. If operat ing in MULTIPROCES-
SOR (9-Bit) Mode, further actions may be required depending on the MULTIPRO-
CESSOR Mode bits MPMD[1:0].
7. Return to Step 5 to receive additional data.
Receiving Data using the Interrupt-Driven Method
The UART Receiver interrupt indicates the availability of new data (as well as error con-
ditions). Observe the following procedure to configure the UART receiver for interrupt-
driven operation:
1. W rite to the UART Baud Rate High and Low Byte registers to set the appropriate baud
rate.
2. Enable the UART pin functions by configuring the associated GPIO port pins for
alternate function operation.
3. Execute a DI instruction to disable interrupts.
4. Write to the Interrupt control registers to enable the UART Receiver interrupt and set
the appropriate priority.
5. Clear the UART Receiver interrupt in the applicable Interrupt Request Register.
6. Write to the UART Control 1 Register to enable MULTIPROCESSOR (9-Bit) Mode
functions, if appropriate.
–Set the MULTIPROCESSOR Mode Select (MPEN) to enable MULTIPROCES-
SOR Mode.
–Set the MULTIPROCESSOR Mode bits, MPMD[1:0], to select the appropriate
address matching scheme.
–Configure the UART to interrupt on received data and errors or errors only (inter-
rupt on errors only is unlikely to be useful for Z8 Encore! XP devices without a
DMA block).
7. Write the device address to the Address Compare Register (automatic multiprocessor
modes only).
8. Write to the UART Control 0 Register to:
–Set the receive enable bit (REN) to enable the UART for data reception
–Enable parity, if appropriate and if MULTIPROCESSOR Mode is not enabled,
and select either even or odd parity
9. Execute an EI instruction to enable interrupts.
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The UART is now configured for interrupt-driven data reception. When the UART
Receiver interrupt is detected, the associated interrupt service routine performs the follow-
ing functions:
1. Check the UART Status 0 Register to determine the source of the interrupt: error,
break, or received data.
2. If the interrupt was caused by data available, read the data from the UART Receive
Data Register . If operating in MULTIPROCESSOR (9-Bit) Mode, further actions may
be required depending on the MULTIPROCESSOR Mode bits MPMD[1:0].
3. Clear the UART Receiver interrupt in the applicable Interrupt Request Register.
4. Execute the IRET instruction to return from the interrupt service routine and await
more data.
Clear To Send (CTS) Operation
The CTS pin, if enabled by the CTSE bit of the UART Control 0 Register, performs flow
control on the outgoing transmit datastream. The Clear To Send (CTS) input pin is sam-
pled one system clock before beginning any new character transmission. To delay trans-
mission of the next data character, an external receiver must deassert CTS at least one
system clock cycle before a new data transmission begins. For multiple character trans-
missions, this would typically be done during stop bit transmission. If CTS deasserts in the
middle of a character transmission, the current character is sent completely.
MULTIPROCESSOR (9-bit) Mode
The UART has a MULTIPROCESSOR (9-Bit) Mode that uses an extra (9th) bit for selec-
tive communication when a number of processors share a common UAR T bus. In MULTI-
PROCESSOR Mode (also referred to as 9-Bit mode), the multiprocessor bit (MP) is
transmitted immediately following the 8 bits of data and immediately preceding the stop
bit(s); the character format is displayed in Figure 16.
Figure 16. UART Asynchronous MULTIPROCESSOR Mode Data Format
Start Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 MP
Data Field
lsb msb
Idle State
of Line
Stop Bit(s)
1
2
1
0
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In MULTIPROCESSOR (9-Bit) Mode, the parity bit location (9th bit) becomes the MUL-
TIPROCESSOR control bit. The UART Control 1 and Status 1 registers provide MULTI-
PROCESSOR (9-Bit) Mode control and status information. If an automatic address
matching scheme is enabled, the UART Addres s Compare Register holds the network
address of the device.
MULTIPROCESSOR (9-bit) Mode Rece ive Interrupts
When MULTIPROCESSOR Mode is enabled, the UAR T only processes frames addressed
to it. The determination of whether a frame of data is addressed to the UAR T can be made
in hardware, software or some combination of the two, depending on the multiprocessor
configuration bits. In general, th e address compare feature reduces the load on the CPU,
since it does not need to access the UART when it receives data directed to other devices
on the multinode network. The following three MULTIPROCESSOR modes are available
in hardware:
•
Interrupt on all address bytes
•
Interrupt on matched address bytes and correctly framed data bytes
•
Interrupt only on correctly framed data bytes
These modes are selected with MPMD[1:0] in the UART Control 1 Register. For all
MULTIPROCESSOR modes, bit MPEN of the UART Control 1 Register must be set to 1.
The first scheme is enabled by writing 01b to MPMD[1:0]. In this mode, all incoming
address bytes cause an interrupt, while data bytes never cause an interrupt. The interrupt
service routine must manually check the address byte that caused triggered the interrupt. If
it matches the UART address, the software clears MPMD[0]. At this point, each new
incoming byte interrupts the CPU. The software is then responsible for determining the
end of the frame. It checks for end-of-frame by reading the MPRX bit of the UART Status
1 Register for each incoming byte. If MPRX=1, a new frame has begun. If the address of
this new frame is different from the UART’s address, then set MPMD[0] to 1 causing the
UART interrupts to go inactive until the next address byte. If the new frame’s address
matches the UART’s, the data in the new frame is processed as well.
The second scheme is enabled by setting MPMD[1:0] to 10b and writing the UART’s
address into the UART Address Compare Register. This mode introduces more hardware
control, interrupting only on frames that match the UART’s address. When an incoming
address byte does not match the UAR T’s address, it is ignored. All successive data bytes in
this frame are also ignored. When a matching address byte occurs, an interrupt is issued
and further interrupts now occur on each successive data byte. The first data byte in the
frame contains the NEWFRM = 1 in the UART Status 1 Register. When the next address
byte occurs, the hardware compares it to the UART’s address. If there is a match, the inter-
rupts continue sand the NEWFRM bit is set for the first byte of the new frame. If there is
no match, then the UART ignores all incoming bytes until the next address match.
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The third scheme is enabled by setting MPMD[1:0] to 11b and by writing the UART’s
address into the UART Address Compare Register. This mode is identical to the second
scheme, except that there are no interrupts on address bytes. The first data byte of each
frame is still accompanied by a NEWFRM assertion.
External Driver Enable
The UART provides a Driver Enable (DE) signal for off-chip bus transceivers. This fea-
ture reduces the software overhead associ ated with using a GPIO pin to control the trans-
ceiver when communicating on a multitransceiver bus, such as RS-485.
Driver Enable is an active High signal that envelopes the entire transmitted data frame
including parity and stop bits as displayed in Figure 17. The Driver Enable signal asserts
when a byte is written to the UART Transmit Data Register. The Driver Enable signal
asserts at least one UART bit period and no greater than two UART bit periods before the
start bit is transmitted. This timing allows a setup time to enable the transceiver. The
Driver Enable signal deasserts one system clock period after the last stop bit is transmit-
ted. This one system clock delay allows both time for data to clear the transceiver before
disabling it, as well as the ability to determine if another character follows the current
character. In the event of back to back characters (new data must be written to the Trans-
mit Data Register before the previous character is completely transmitted) the DE signal is
not deasserted between charac ters. The DEPOL bit in the UART Control Register 1 sets
the polarity of the Driver Enable signal.
The Driver Enable-to-start-bit set-up time is calculated as:
Figure 17. UART Driver Enable Signal Timing (shown with 1 Stop Bit and Parity)
Start Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Parity
Data Field
lsb msb
Idle State
of Line
Stop Bit
1
1
0
0
1
DE
1
Baud Rate (Hz)
-------------------------------------
DE to Start Bit Setup Time (s) 2
Baud Rate (Hz)
-------------------------------------
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UART Interrupts
The UART features separate interrupts for the transmitter and the receiver. In addition,
when the UART primary functionality is disabled, the Baud Rate Generator can also func-
tion as a basic timer with interrupt capability.
Transmitter Interrupts
The transmitter generates a single interrupt when the Transmit Data Register Empty bit
(TDRE) is set to 1. This indicates that the transmitter is ready to accept new data for trans-
mission. The TDRE interrupt occurs after the Transmit Shift Register has shifted the first
bit of data out. At this point, the Transmit Data Register can be written with the next char-
acter to send. This provides 7 bit-periods of latency to load the Transmit Data Register
before the Transmit Shift Register completes shifting the current character. Writing to the
UART Transmit Data Register clears the TDRE bit to 0.
Receiver Interrupts
The receiver generates an interrupt when any of the following events occ urs :
•
A data byte has been received and is available in the UAR T Receive Data Register. This
interrupt can be disabled independent of the other receiver interrupt sources. The re-
ceived data interrupt occurs once the receive character has been received and placed in
the Receive Data Register. Software must respond to this received data available con-
dition before the next character is completely received to avoid an overrun error.
In MULTIPROCESSOR Mode (MPEN = 1), the receive data interrupts are dependent on
the multiprocessor configuration and the most recent address byte.
•
A break is received
•
An overrun is detected
•
A data framing error is detected
UART Overrun Errors
When an overrun error condition occurs the UART prevents overwriting of the valid data
currently in the Receive Data Register. The Break Detect and Overrun status bits are not
displayed until after the valid data has been read.
After the valid data has been read, the UART Status 0 Register is updated to indicate the
overrun condition (and Break Detect, if applicable). The RDA bit is set to 1 to indicate that
the Receive Data Register contains a data byte. However, because the overrun error
occurred, this byte may not contain valid data and should be ignored. The BRKD bit indi-
cates if the overrun was caused by a break condition on the line. After reading the status
Note:
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byte indicating an overrun error, the Receive Data Register must be read again to clear the
error bits is the UART Status 0 Register. Updates to the Receive Data Register occur only
when the next data word is received.
UART Data and Error Handling Procedu re
Figure 18 displays the recommended procedur e for use in UAR T receiver interrupt service
routines.
Baud Rate Generator Interrupts
If the Baud Rate Generator interrupt enable is set, the UART Receiver interrupt asserts
when the UART Baud Rate Generator reloads. This action allows the Baud Rate Genera-
tor to function as an additional counter if the UART functionality is not employed.
Figure 18. UART Rece iv er In terrupt Service Routine Flow
Receiver
Errors?
No
Yes
Read Status
Discard Data
Read Data which
Interrupt
Receiver
Ready
clears RDA bit and
resets error bits
Read Data
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
98
UART Baud Rate Generator
The UART Baud Rate Generator crea te s a low er frequency baud rate clock for data trans-
mission. The input to the Baud Rate Generator is the system clock. The UART Baud Rate
High and Low Byte registers combine to create a 16-bit baud rate divisor value
(BRG[15:0]) that sets the data transmission rate (baud rate) of the UART. The UART data
rate is calculated using the following equation:
When the UART is disabled, the Baud Rate Generator can function as a basic 16-bit timer
with interrupt on time-out. To configure the Baud Rate Generator as a timer with interrupt
on time-out, complete the following procedure:
1. Disable the UART by clearing the REN and TEN bits in the UART Control 0 Register
to 0.
2. Load the appropriate 16-bit count value into the UART Baud Rate High and Low Byte
registers.
3. Enable the Baud Rate Generator timer function and associated interrupt by setting the
BRGCTL bit in the UART Control 1 Register to 1.
When configured as a general purpose timer, the interrupt interval is calculated using the
following equation:
UART Control Register Definitions
The UART control registers support the UART and the associated Infrared Encoder/
Decoders. For more information about the infrared operation, see the Infrared Encoder/
Decoder chapter on page 109.
UART Transmit Data Register
Data bytes written to the UAR T T ransmit Data Re gister , shown in Table 53, are shift ed out
on the TXDx pin. The write-only UART Transmit Data Register shares a Re gister File
address with the read-only UART Receive Data Register.
UART Data Rate (bits/s) System Clock Frequency (Hz)
16 UART Baud Rate Divisor Value
------------------------------------------------------------------------------------------
=
Interrupt Interval s System Clock Period (s) BRG 15:0=
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
99
UART Receive Data Register
Data bytes received th rough the RXD x pin are stored in the UART Receive Data Register ,
shown in Table 54. The read-only UART Receive Data Register shares a Register File
address with the write-only UART Transmit Data Register.
Table 53. UART Transmit Data Register (UxTXD)
Bit 76543210
Field TXD
RESET X
R/W W
Address F40H and F48H
Bit Description
[7:0]
TXD Transmit Data
UART transmitter data byte to be shifted out through the TXDx pin.
Table 54. UART Receive Data Register (UxRXD)
Bit 76543210
Field RXD
RESET X
R/W R
Address F40H and F48H
Bit Description
[7:0]
RXD Receive Data
UART receiver data byte from the RXDx pin.
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
100
UART Status 0 Register
The UART Status 0 Register, shown in Table 55, identifies the current UART operating
configuration and status.
Table 55. UAR T Status 0 Register (UxSTAT0)
Bit 76543210
Field RDA PE OE FE BRKD TDRE TXE CTS
RESET 01X
R/W R
Address F41H and F49H
Bit Description
[7]
RDA Receive Data Available
This bit indicates that the UART Receive Data Register has received data. Reading the UART
Receive Data Register clears this bit.
0 = The UART Receive Data Register is empty.
1 = There is a byte in the UART Receive Data Register.
[6]
PE Parity Error
This bit indicates that a parity error has occurred. Reading the UART Receive Data Register
clears this bit.
0 = No parity error occurred.
1 = A parity error occurred.
[5]
OE Overrun Error
This bit indicates that an overrun error has occurred. An overrun occurs when new data is
received and the UART Receive Data Register has not been read. If the RDA bit is reset to 0,
then reading the UART Receive Data Register clears this bit.
0 = No overrun error occurred.
1 = An overrun erro r oc cu rre d .
[4]
FE Framing Error
This bit indicates that a framing error (no stop bit following data reception) was detected. Read-
ing the UART Receive Data Register clears this bit.
0 = No framing error occ ur re d .
1 = A framing error occu rr ed .
[3]
BRKD Break Detect
This bit indicates that a break occurred. If the data bit s, parity/multiprocessor bit, and stop bit(s)
are all zeros then this bit is set to 1. Reading the UART Receive Data Register clears this bit.
0 = No break occurred.
1 = A break occurred.
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
101
UART Status 1 Register
The UART Status 1 Register, shown in Table 56, contains multiprocessor control and
UART status bits.
[2]
TDRE Transmitter Data Register Empty
This bit indicates that the UAR T T ransmit Dat a Register i s empty and ready for additional d ata.
Writing to the UART Transmit Data Register reset s this bit.
0 = Do not write to the UART Transmit Data Register.
1 = The UART Transmit Data Register is ready to receive an additional byte to be transmitted.
[1]
TXE Transmitter Empty
This bit indicates that the Transmit Shift Register is empty and character transmission is fin-
ished.
0 = Data is currently transmitting.
1 = Transmission is complete.
[0]
CTS CTS Signal
When this bit is read, it returns the level of the CTS signal.
Table 56. UAR T Status 1 Register (UxSTAT1)
Bit 76543210
Field Reserved NEWFRM MPRX
RESET 0
R/W RR/WR
Address F44H and F4CH
Bit Description
[7:2] Reserved
These bits are reserved and must be programmed to 000000.
[1]
NEWFRM New Frame
Status bit denoting the start of a new frame. Reading the UART Receive Data Register
resets this bit to 0.
0 = The current byte is not the first data byte of a new frame.
1 = The current byte is the first data byte of a new frame.
[0]
MPRX Multiprocessor Receive
Returns the value of the last multiprocessor bit received. Reading from the UART Receive
Data Register resets this bit to 0.
Bit Description (Continued)
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
102
UART Control 0 and Control 1 Registers
The UART Control 0 and Control 1 Registers, shown in Tables 57 and 58, configure the
properties of the UART’s transmit and receive operations. The UART Control registers
must not been written while the UART is enabled.
Table 57. UART Control 0 Register (UxCTL0)
Bit 76543210
Field TEN REN CTSE PEN PSEL SBRK STOP LBEN
RESET 0
R/W R/W
Address F42H and F4AH
Bit Description
[7]
TEN Transmit Enable
This bit enables or disables the transmitter. The enable is also controlled by the CTS signal
and the CTSE bit. If the CTS signal is low and the CTSE bit is 1, the transmitter is enabled.
0 = Transmitter disabled.
1 = Transmitter enabled.
[6]
REN Receive Enable
This bit enables or disables the receiver.
0 = Receiver disabled.
1 = Receiver enabled.
[5]
CTSE CTS Enable
0 = The CTS signal has no effect on the transmitter.
1 = The UART recognizes the CTS signal as an enable control from the transmitter.
[4]
PEN Parity Enable
This bit enables or disables parity. Even or odd is determined by the PSEL bit. It is overridden
by the MPEN bit.
0 = Parity is disabled.
1 = The transmitter sends data with an additional parity bit and the receiver receives an addi-
tional parity bit.
[3]
PSEL Parity Select
0 = Even parity is transmitted and expected on all received data.
1 = Odd parity is transmitted and expected on all received data.
[2]
SBRK Send Break
This bit pauses or breaks data transmission. Sending a break interrupts any tran smission in
progress, so ensure that the transmitter has finished sending data before setting this bit.
0 = No break is sent.
1 = The output of the transmitter is zero.
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
103
[1]
STOP Stop Bit Select
0 = The transmitter sends one stop bit.
1 = The transmitter sends two stop bits.
[0]
LBEN Loop Back Enable
0 = Normal operation.
1 = All transmitted data is looped back to the rece ive r.
Table 58. UART Control 1 Register (UxCTL1)
Bit 76543210
Field MPMD[1] MPEN MPMD[0] MPBT DEPOL BRGCTL RDAIRQ IREN
RESET 0
R/W R/W
Address F43H and F4BH
Bit Description
[7,5]
MPMD[1,0] MULTIPROCESSOR Mode
If MULTIPROCESSOR (9-Bit) Mode is enabled,
00 = The UART generates an interrupt request on all received bytes (data and address).
01 = The UART generates an interrupt request only on received address bytes.
10 = The UART generates an interrupt request when a received address byte matches the
value stored in the Address Compare Register and on all successive data bytes until
an address mismatch occurs.
11 = The UART ge nerates an interrup t request on all rece ived dat a bytes for which the most
recent address byte matched the value in the Address Compare Register.
[6]
MPEN MULTIPROCESSOR (9-bit) Enable
This bit is used to enable MULTIPROCESSOR (9-Bit) Mode.
0 = Disable MULTIPROCESSOR (9-Bit) Mode.
1 = Enable MULTIPRO CESS OR (9 -Bit ) Mo d e.
[4]
MPBT MULTIPROCESSOR Bit Transmit
This bit is applicable only when MULTIPROCESSOR (9-Bit) Mode is enabled.
0 = Send a 0 in the multiprocessor bit location of the data stream (9th bit).
1 = Send a 1 in the multiprocessor bit location of the data stream (9th bit).
[3]
DEPOL Driver Enable Polarity
0 = DE signal is Active High.
1 = DE signal is Active Low.
Bit Description (Continued)
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
104
[2]
BRGCTL Baud Rate Control
This bit causes different UART behavior depending on whether the UART receiver is
enabled (REN = 1 in the UAR T Control 0 Register). When the UART receive r is not enabled,
this bit determines whether the Baud Rate Generator issues interrupts.
0 = Reads from the Baud Rate High and Low Byte registers return the BRG reload value
1 = The Baud Rate Generator generates a receive interrupt when it counts down to 0.
Reads from the Baud Rate High and Low Byte registers return the current BRG count
value.
When the UART receiver is enabled, this bit allows reads from the Baud Rate Registers to
return the BRG count value instead of the reload value.
0 = Reads from the Baud Rate High and Low Byte registers return the BRG reload value.
1 = Reads from the Baud Rate High and Low Byte registers return the current BRG count
value. Unlike the timers, there is no mech anism to latch the High Byte when the Low
Byte is read.
[1]
RDAIRQ Receive Data Interrupt Enable
0 = Received data and receive r error s ge ne r ate s an interr up t re qu es t to th e Int er ru p t Con-
troller.
1 = Received data does not generate an interrupt request to the Interrupt Controller. Only
receiver errors generate an interrupt request.
[0]
IREN Infrared Encoder/Decoder Enable
0 = Infrared Encoder/Decoder is disabled. UART operates normally operation.
1 = Infrared Encoder/Decoder is enabled. The UART transmits and receives data through
the Infrared Encoder/Decoder.
Bit Description (Continued)
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
105
UART Address Compare Register
The UART Address Compare Register, shown in Table 59, stores the multinode network
address of the UART. When the MPMD[1] bit of UART Control Register 0 is set, all
incoming address bytes are compared to the value stored in the Address Compare Regis-
ter. Rece ive interrupts and RDA assertions only occur in the event of a match.
UART Baud Rate High and Low Byte Registers
The UART Baud Rate High and Low Byte registers, shown in Tables 60 and 61, combine
to create a 16-bit baud rate divisor value (BRG[15:0]) that sets the data transmission rate
(baud rate) of the UART. To configure the Baud Rate Generator as a timer with interrupt
on time-out, complete the following procedure:
1. Disable the UART by clearing the REN and TEN bits in the UART Control 0 Register
to 0.
2. Load the appropriate 16-bit count value into the UART Baud Rate High and Low Byte
registers.
3. Enable the Baud Rate Generator timer function and associated interrupt by setting the
BRGCTL bit in the UART Control 1 Register to 1.
When configured as a general-purpose timer, the UART BRG interrupt interval is calcu-
lated using the following equation:
Table 59. UART Address Compare Register (UxADDR)
Bit 76543210
Field COMP_ADDR
RESET 0
R/W R/W
Address F45H and F4DH
Bit Description
[7:0]
COMP_ADDR Compare Address
This 8-bit value is compared to the incoming address bytes.
UART BRG Interrupt Interval s System Clock Period (s) BRG 15:0=
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
106
For a given UART data rate, the integer baud rate divisor value is calculated using the fol-
lowing equation:
The baud rate error relative to the appropriate baud rate is calculated using the following
equation:
For reliable communication, the UART baud rate error must never exceed 5 percent.
Table 62 lists data rate errors for popular baud rates and commonly used crystal oscillator
frequencies.
Table 60. UART Baud Rate High Byte Register (UxBRH)
Bit 76543210
Field BRH
RESET 1
R/W R/W
Address F46H and F4EH
Table 61. UART Baud Rate Low Byte Register (UxBRL)
Bit7 76543210
Field BRL
RESET 1
R/W R/W
Address F47H and F4FH
UART Baud Rate Divisor Value (BRG) Round System Clock Frequency (Hz)
16 UART Data Rate (bits/s)
------------------------------------------------------------------------
=
UART Baud Rate Error (%) 100 Actual Data Rate Desired Data Rate–
Desired Data Rate
-------------------------------------------------------------------------------------------
=
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Z8 Encore! XP® F64xx Series
Product Specification
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Table 62. UART Baud Rates
20.0 MHz System Clock 18.432 MHz System Clock
Desired
Rate
(kHz)
BRG
Divisor
(Decimal) Actual Rate
(kHz) Error
(%)
Desired
Rate
(kHz)
BRG
Divisor
(Decimal) Actual Rate
(kHz) Error
(%)
1250.0 1 1250.0 0.00 1250.0 1 1152.0 –7.84%
625.0 2 625.0 0.00 625.0 2 576.0 –7.84%
250.0 5 250.0 0.00 250.0 5 230.4 –7.84%
115.2 11 113.6 –1.36 115.2 10 115.2 0.00
57.6 22 56.8 –1.36 57.6 20 57.6 0.00
38.4 33 37.9 –1.36 38.4 30 38.4 0.00
19.2 65 19.2 0.16 19.2 60 19.2 0.00
9.60 130 9.62 0.16 9.60 120 9.60 0.00
4.80 260 4.81 0.16 4.80 240 4.80 0.00
2.40 521 2.40 –0.03 2.40 480 2.40 0.00
1.20 1042 1.20 –0.03 1.20 960 1.20 0.00
0.60 2083 0.60 0.02 0.60 1920 0.60 0.00
0.30 4167 0.30 –0.01 0.30 3840 0.30 0.00
16.667 MHz System Clock 11.0592 MHz System Clock
Desired
Rate
(kHz)
BRG
Divisor
(Decimal) Actual Rate
(kHz) Error
(%)
Desired
Rate
(kHz)
BRG
Divisor
(Decimal) Actual Rate
(kHz) Error
(%)
1250.0 1 1041.69 –16.67 1250.0 N/A N/A N/A
625.0 2 520.8 –16.67 625.0 1 691.2 10.59
250.0 4 260.4 4.17 250.0 3 230.4 –7.84
115.2 9 115.7 0.47 115.2 6 115.2 0.00
57.6 18 57.87 0.47 57.6 12 57.6 0.00
38.4 27 38.6 0.47 38.4 18 38.4 0.00
19.2 54 19.3 0.47 19.2 36 19.2 0.00
9.60 109 9.56 –0.45 9.60 72 9.60 0.00
4.80 217 4.80 –0.83 4.80 144 4.80 0.00
2.40 434 2.40 0.01 2.40 288 2.40 0.00
1.20 868 1.20 0.01 1.20 576 1.20 0.00
0.60 1736 0.60 0.01 0.60 1152 0.60 0.00
0.30 3472 0.30 0.01 0.30 2304 0.30 0.00
PS019924-0113 PREL I M I N A RY UART Control Register Definitions
Z8 Encore! XP® F64xx Series
Product Specification
108
10.0 MHz System Clock 5.5296 MHz System Clock
Desired
Rate
(kHz)
BRG
Divisor
(Decimal) Actual Rate
(kHz) Error
(%)
Desired
Rate
(kHz)
BRG
Divisor
(Decimal) Actual Rate
(kHz) Error
(%)
1250.0 N/A N/A N/A 1250.0 N/A N/A N/A
625.0 1 625.0 0.00 625.0 N/A N/A N/A
250.0 3 208.33 –16.67 250.0 1 345.6 38.24
115.2 5 125.0 8.51 115.2 3 115.2 0.00
57.6 11 56.8 –1.36 57.6 6 57.6 0.00
38.4 16 39.1 1.73 38.4 9 38.4 0.00
19.2 33 18.9 0.16 19.2 18 19.2 0.00
9.60 65 9.62 0.16 9.60 36 9.60 0.00
4.80 130 4.81 0.16 4.80 72 4.80 0.00
2.40 260 2.40 –0.03 2.40 144 2.40 0.00
1.20 521 1.20 –0.03 1.20 288 1.20 0.00
0.60 1042 0.60 –0.03 0.60 576 0.60 0.00
0.30 2083 0.30 0.2 0.30 1152 0.30 0.00
3.579545 MHz System Clock 1.8432 MHz System Clock
Desired
Rate
(kHz)
BRG
Divisor
(Decimal) Actual Rate
(kHz) Error
(%)
Desired
Rate
(kHz)
BRG
Divisor
(Decimal) Actual Rate
(kHz) Error
(%)
1250.0 N/A N/A N/A 1250.0 N/A N/A N/A
625.0 N/A N/A N/A 625.0 N/A N/A N/A
250.0 1 223.72 –10.51 250.0 N/A N/A N/A
115.2 2 111.9 –2.90 115.2 1 115.2 0.00
57.6 4 55.9 –2.90 57.6 2 57.6 0.00
38.4 6 37.3 –2.90 38.4 3 38.4 0.00
19.2 12 18.6 –2.90 19.2 6 19.2 0.00
9.60 23 9.73 1.32 9.60 12 9.60 0.00
4.80 47 4.76 –0.83 4.80 24 4.80 0.00
2.40 93 2.41 0.23 2.40 48 2.40 0.00
1.20 186 1.20 0.23 1.20 96 1.20 0.00
0.60 373 0.60 –0.04 0.60 192 0.60 0.00
0.30 746 0.30 –0.04 0.30 384 0.30 0.00
Table 62. UART Baud Rates (Continued)
PS019924-0113 PR E L I M INARY Infrared Encoder/Decoder
Z8 Encore! XP® F64xx Series
Product Specification
109
Infrared Encoder/Decoder
The Z8 Encore! XP F64xx Series products contain two fully-functional, hig h-performance
UART-to-infrared encoders/decoders (endecs). Each infrared endec is integrated with an
on-chip UART to allow easy communication between the Z8 Encore! XP F64xx Series
and IrDA Physical Layer Specification Version 1.3-compliant infrared transceivers. Infra-
red communication provides secure, reliable, low-cost, point-to-point communication
between PCs, PDAs, cell phones, printers, and other infrared enabled devices.
Architecture
Figure 19 displays the architecture of the infrared endec.
Operation
When the infrared endec is enabled, the transmit data from the associated on-chip UART
is encoded as digital signals in accordance with the IrDA standard and output to the infra-
red transceiver via the TxD pin. Likewise, data received from the infrared transceiver is
passed to the infrared endec via the RxD pin, decoded by the infrared endec, and then
Figure 19. Infrared Data Communication System Block Diagram
Interrupt
Signal
RxD
TxD
Infrared
Encoder/Decoder
UART
RxD
TxD
System
Clock
I/O
Address Data
Infrared
Transceiver
RxD
TxD
Baud Rate
Clock (Endec)
Zilog
ZHX1810
PS019924-0113 PRELIMI N A R Y Operation
Z8 Encore! XP® F64xx Series
Product Specification
110
passed to the UART. Communication is half-duplex, whic h means simultaneous data
transmission and reception is not allowed.
The baud rate is set by the UART’ s Baud Rate Generator and supports IrDA standard baud
rates from 9600 baud to 115.2 KBaud. Higher baud rates are possible, but do not meet
IrDA specifications. The UART must be enabled to use the infrared endec. The infrared
endec data rate is calculated usin g the following equation:
Transmitting IrDA Data
The data to be transmitted using the infrared transceiver is first sent to the UART. The
UART’s transmit signal (TxD) and baud rate clock are used by the IrDA to generate the
modulation signal (IR_TXD) that drives the infrared transceiver. Each UART/Infrared
data bit is 16-clock wide. If the data to be transmitted is 1, the IR_TXD signal remains low
for the full 16-clock period. If the data to be transmit ted is 0, a 3-clock high pulse is output
following a 7-clock low period. After the 3-clock high pulse, a 6-clock low pulse is output
to complete the full 16-clock data period. Figure 20 displ ays IrDA data tran smission .
When the infrared endec is enabled, the UART’s TxD signal is internal to the Z8 Encore!
XP F64xx Series products while the IR_TXD signal is output through the TxD pin.
Figure 20. Infrared Data Transmission
Infrared Data Rate (bits/s) System Clock Frequency (Hz)
16 UART Baud Rate Divisor Value
------------------------------------------------------------------------------------------
=
Baud Rate
IR_TXD
UART’s
16-clock
period
Start Bit = 0 Data Bit 0 = 1 Data Bit 1 = 0 Data Bit 2 = 1 Data Bit 3 = 1
7-clock
delay
3-clock
pulse
TxD
Clock
PS019924-0113 PRELIMI N A R Y Operation
Z8 Encore! XP® F64xx Series
Product Specification
111
Receiving IrDA Data
Data received from the infrared transceiver via the IR_RXD signal through the RxD pin is
decoded by the infrared endec and passed to the UART. The UART’s baud rate clock is
used by the infrared endec to generate the demodulated signal (RxD) that drives the
UART. Each UART/Infrared data bit is 16-clocks wide. Figure 21 displays data reception.
When the infrared endec is enabled, the UART’s RxD signal is internal to the Z8 Encore!
XP F64xx Series products while the IR_RXD signal is received through the RxD pin.
The system clock frequency must be at least 1.0 MHz to ensure proper reception of the
1.6 µs minimum width pulses allowed by the IrDA standard.
Endec Receiver Synchronization
The IrDA receiver uses a local baud rate clock counter (0 to 15 clock periods) to generate
an input stream for the UART and to create a sampling window for detection of incoming
pulses. The genera ted UART input (UART RxD) is delayed by 8 baud rate clock periods
with respect to the incoming IrDA data stream. When a falling edge in the input data
stream is detected, the endec counter is reset. When the count reaches a value of 8, the
UART RxD value is updated to reflect the value of the decoded data. When the count
reaches 12 baud clock periods, the sampling window for the next incoming pulse opens.
The window remains open until the count again reaches 8 (i.e., 24 baud clock periods
Figure 21. Infrared Data Reception
Baud Rate
UART’s
IR_RXD
16-clock
period
Start Bit = 0 Data Bit 0 = 1 Data Bit 1 = 0 Data Bit 2 = 1 Data Bit 3 = 1
8-clock
delay
Clock
RxD
16-clock
period 16-clock
period 16-clock
period 16-clock
period
Start Bit = 0 Data Bit 0 = 1 Data Bit 1 = 0 Data Bit 2 = 1 Data Bit 3 = 1
min. 1.6µs
pulse
Caution:
PS019924-0113 PREL I M I N A RY Infrared Encoder/Decoder Control Register
Z8 Encore! XP® F64xx Series
Product Specification
112
since the previous pulse was detected). This gives the endec a sampling window of minus
four baud rate clocks to plus eight baud rate clocks around the expected time of an incom-
ing pulse. If an incoming pulse is detected inside this window this process is repeated. If
the incoming data is a logical 1 (no pulse), the endec returns to the initial state and waits
for the next falling edge. As each falling edge is detected, the endec clock counter is reset,
resynchronizing the endec to the incoming signal. This action allows the endec to tolerate
jitter and baud rate errors in the incoming data stream. Resynchronizing the endec does
not alter the operation of the UAR T, which ultimately receives the data. The UAR T is only
synchronized to the incoming data stream when a start bit is received.
Infrared Encoder/Decoder Control Register Definitions
All infrared endec configuration and status information is set by the UART control regis-
ters as defined in the UART Control Register Definitions section on page 98.
To prevent spurious signals during IrDA data transmission, set the IREN bit in the
UARTx Control 1 Register to 1 to enable the Infrared Encoder/Decoder before enabling
the GPIO Port alternate function for the corresponding pin.
Caution:
PS019924-0113 PREL I M I N A R Y Serial Peripheral Interface
Z8 Encore! XP® F64xx Series
Product Specification
113
Serial Peripheral Interface
The Serial Peripheral Interface is a synchronous interface allowing several SPI-type
devices to be interconnected. SPI-compatible devices include EEPROMs, Analog-to-Dig-
ital Converters, and ISDN devices. Features of the SPI include:
•
Full-duplex, synchronous, character-oriented communication
•
Four-wire interface
•
Data transfers rates up to a maximum of one-half the system clock frequency
•
Error detection
•
Dedicated Baud Rate Generator
Architecture
The SPI may be configured as either a Master (in single or multimaster systems) or a Slave
as displayed in Figures 22 through 24.
Figure 22. SPI Configured as a Master in a Single-Master, Single-Slave System
SPI Master
8-bit Shift Register
Bit 0 Bit 7
MISO
MOSI
SCK
SS
To Slave’s SS Pin
From Slave
To Slave
To Slave Baud Rate
Generator
PS019924-0113 PRELIMINA R Y Architecture
Z8 Encore! XP® F64xx Series
Product Specification
114
Figure 23. SPI Configured as a Master in a Single-Master, Multiple-Slave System
Figure 24. SPI Configured as a Slave
SPI Master
8-bit Shift Re g ist er
Bit 0 Bit 7
MISO
MOSI
SCK
GPIO
To Slave #2’s SS Pin
From Slave
To Slave
To Slave
SS
Baud Rate
Generator
VCC
GPIO
To Slave #1’s SS Pin
SPI Slave
8-bit Shift Register
Bit 7 Bit 0
MISO
MOSI
SCK
SSFrom Master
To Master
From Master
From Master
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Operation
The SPI is a full-duplex, synchronous, character-oriented channel that supports a four-wire
interface (serial clock, transmit, receive and Slave select). The SPI block consists of a
transmit/receive shift register, a baud rate (clock) generator and a control unit.
During an SPI transfer, data is sent and received simultaneously by both the Master and
the Slave SPI devices. Separate signals are required for data and the serial clock. When an
SPI transfer occurs, a multibit (typically 8-bit) character is shifted out one data pin and an
multibit character is simultaneously shifted in on a second data pin. An 8-bit shift register
in the Master and another 8-bit shift register in the Slave are connected as a circular buffer .
The SPI Shift Register is single-buffered in the transmit and receive directions. New data
to be transmitted cannot be written into the shift register until the previous transmission is
complete and receive data (if valid) has been read.
SPI Signals
The four basic SPI signals are:
•
Master-In/Slave-Out
•
Master-Out/Slave-In
•
Serial Clock
•
Slave Select
Each signal is described in both Master and Slave modes.
Master-In/Slave-Out
The Master-In/Slave-Out (MISO) pin is configured as an input in a Master device and as
an output in a Slave device. It is one of the two lines that transfer serial data, with the most
significant bit sent first. The MISO pin of a Slave device is placed in a high-impedance
state if the Slave is not selected. When the SPI is not enabled, this signal is in a high-
impedance state.
Master-Out/Slave-In
The Master -Out/S lave-In (MOS I) pin is configured as an output in a Master device and as
an input in a Slave device. It is one of the two lines that trans fer serial data, with the most
significant bit sent first. When the SPI is not enabled, this signal is in a high-impedance
state.
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Serial Clock
The Serial Clock (SCK) synchronizes data movement both in and out of the device
through its MOSI and MIS O pins. In MASTER Mo de, the S PI’s Baud Rate Generator cre-
ates the serial clock. The Master drives the serial clock out its own SCK pin to th e Slave’s
SCK pin. When the SPI is configured as a Slave, the SCK pin is an input and the clock sig-
nal from the Master synchronizes the data transfer between the Master and Slave devices.
Slave devices ignore the SCK signal, unless the SS pin is ass erted. When configured as a
slave, the SPI block requires a minimum SCK period of greater than or equal to 8 times
the system (XIN) clo ck peri od.
The Master and Slave are each capable of exchanging a character of data during a
sequence of NUMBITS clock cycles (see the NUMBITS fiel d in the SPI Mode Register
section on page 125). In both Master and Slave SPI devices, data is shifted on one edge of
the SCK and is sampled on the opposite edge where data is stable. Edge polarity is deter-
mined by the SPI phase and polarity control.
Slave Select
The active Low Slave Select (SS) input signal selects a Slave SPI device. SS must be Low
prior to all data communication to and from the Slave device. SS must stay Low for the
full duration of each character transferred. The SS signal may stay Low during the transfer
of multiple characters or may deassert between each character.
When the SPI is configured as the only Master in an SPI system, the SS pin can be set as
either an input or an output. Other GPIO output pins can also be employed to select exter-
nal SPI Slave devices.
When the SPI is configured as one Master in a multimaster SPI system, the SS pin must be
set as an input. The SS input signal on the Master must be High. If the SS signal goes Low
(indicating another Master is driving the SPI bus), a collision error flag is set in the SPI
Status Register.
SPI Clock Phase and Polarity Control
The SPI supports four combinations of serial clock phase and polarity using two bits in the
SPI Control Register. The clock polarity bit, CLKPOL, selects an active high or active
Low clock and has no effect on the transfer format. Table 63 lists the SPI Clock Phase and
Polarity Operation parameters. The clock phase bit, PHASE, selects one of two fundamen-
tally different transfer formats. For proper data transmission, the clock phase and polarity
must be identical for the SPI Master and the SPI Slave. The Master always places data on
the MOSI line a half-cycle before the receive clock edge (SCK signal), in order for the
Slave to latch the data.
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Transfer Format PHASE Equals Zero
Figure 25 displays the timing diagram for an SPI transfer in which PHASE is cleared to 0.
The two SCK waveforms show polarity with CLKPOL reset to 0 and with CLKPOL set to
one. The diagram may be interpreted as either a Master or Slave timing diagram because
the SCK Master-In/Slave-Out (M ISO) and Master-Out/Slave-In (MOSI) pins are directly
connected between the Master and the Slave.
Table 63. SPI Clock Phase (PHASE) and Clock Polarity (CLKPOL) Operation
PHASE CLKPOL SCK Transmit
Edge SCK Receive
Edge SCK Idle
State
0 0 Falling Rising Low
0 1 Rising Falling High
1 0 Rising Falling Low
1 1 Falling Rising High
Figure 25. SPI Timing When PHASE is 0
SCK
(CLKPOL = 0)
SCK
(CLKPOL = 1)
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0MOSI
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0MISO
Input Sample Time
SS
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Transfer Format PHASE Equals One
Figure 26 displays the timing diagram for an SPI transfer in which PHASE is 1. Two
waveforms are depicted for SCK, one for CLKPOL reset to 0 and another for CLKPOL
set to 1.
Multimaster Operation
In a multimaster SPI system, all SCK pins are tied together, all MOSI pins are tied
together and all MISO pins are tied together. All SPI pins must then be configured in
OPEN-DRAIN mode to prevent bus contention. At any one time, only one SPI device is
configured as the Master and all other SPI devices on the bus are configured as Slaves.
The Master enables a single Slave by asserting the SS pin on that Slave only. Then, the
single Master drives data out its SCK and MOSI pins to the SCK and MOSI pins on the
Slaves (including those which are not enabled). The enabled Slave drives data out its
MISO pin to the MISO Master pin.
For a Master device operating in a multimaster system, if the SS pin is configured as an
input and is driven Low by anoth er Master, the COL bit is set to 1 in the SPI Status Regis-
ter. The COL bit indicates the occurrence of a multimaster collision (mode fault error con-
dition).
Figure 26. SPI Timing When PHASE is 1
SCK
(CLKPOL = 0)
SCK
(CLKPOL = 1)
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0MOSI
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0MISO
Input Sample Time
SS
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Slave Operation
The SPI block is configured for SLAVE Mode operation by setting the SPIEN bit to 1 and
the MMEN bit to 0 in the SPICTL Register and setting the SSIO bit to 0 in the SPIMODE
Register. The IRQE, PHASE, CLKPOL, WOR bits in the SPICTL Register and the
NUMBITS field in the SPIMODE Register must be set to be consistent with the other SPI
devices. The STR bit in the SPICTL Register may be used if appropriate to force a start-
up interrupt. The BIRQ bit in the SPICTL Register and the SSV bit in the SPIMODE Reg-
ister are not used in SLAVE Mode. The SPI baud rate generator is not used in SLAVE
Mode so the SPIBRH and SPIBRL registers need not be initialized.
If the slave has data to send to the master , the data must be written to the SPIDAT Register
before the transaction starts (first edge of SCK when SS is asserted). If the SPIDAT Regis-
ter is not written prior to the slave transaction, the MISO pin outputs whatever value is
currently in the SPIDAT Register.
Due to the delay resulting from synchronization of the SPI input signals to the internal sys-
tem clock, the maximum SPICLK baud rate that can be supported in SLAVE Mode is the
system clock frequency (XIN) divided by 8. This rate is controlled by the SPI master.
Error Detection
The SPI contains error detectio n lo gic to sup port SPI communication protocols and recog-
nize when communication errors have occurred. The SPI Status Register indicates when a
data transmission error has been detec ted.
Overrun (Write Collision)
An overrun error (write collision) indicates that a write to the SPI Data Register was
attempted while a data transfer was in progress (in either MASTER or SLAVE modes). An
overrun sets the OVR bit in the SPI Status Register to 1. Writing a 1 to OVR clears this
error flag. The data register is not altered when a write occurs while data transfer is in
progress.
Mode Fault (Multimaster Collision)
A mode fault indicates when more than one Master is trying to communicate at the same
time (a multimaster collision). The mode fault is detected when the enabled Master’s SS
pin is asserted. A mode fault sets the COL bit in the SPI S tatus Register to 1. W riting a 1 to
COL clears this error flag.
Slave Mode Abort
In the SLAVE Mode of operation, if the SS pin deasserts before all bits in a character have
been transferred, the transaction is aborted. When this condition occurs, the ABT bit is set
in the SPISTAT Register as well as the IRQ bit (indicating the transaction is complete).
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The next time SS asserts, the MISO pin outputs SPIDAT[7], regardless of where the previ-
ous transaction left off. Writing a 1 to ABT clears this error flag.
SPI Interrupts
When SPI interrupts are enabled, the SPI generates an interrupt after character transmis-
sion/reception completes in both MASTER and SLAVE modes. A character can be
defined to be 1 through 8 bits by the NUMBITS field in the SPI Mode Register. In slave
mode it is not necessary for SS to deassert between characters to generate the interrupt.
The SPI in Slave mode can also generate an interrupt if the SS signal deasserts prior to
transfer of all the bits in a character (see description of slave abort error above). Writing a
1 to the IRQ bit in the SPI Status Register clears the pending SPI interrupt request. The
IRQ bit must be cleared to 0 by the Interrupt Service Routine to generate future interrupts.
To start the transfer process, an SPI interrupt may be forced by software writing a 1 to the
STR bit in the SPICTL Register.
If the SPI is disabled, an SPI interrupt can be generated by a Baud Rate Generator time-
out. This timer function must be enabled by setting the BIRQ bit in the SPICTL Register.
This Baud Rate Generator time-out does not set the IRQ bit in the SPISTAT Register , just
the SPI interrupt bit in the interrupt controller.
SPI Baud Rate Generator
In SPI Master Mode, the Baud Rate Generator creates a lower frequency serial clock
(SCK) for data transmission synchronization between the Master and the external Slave.
The input to the Baud Rate Generator is the system clock. The SPI Baud Rate High and
Low Byte registers combine to form a 16-bit reload value, BRG[15:0], for the SPI Baud
Rate Generator. The SPI baud rate is calculated using the following equation:
Minimum baud rate is obtained by setting BRG[15:0] to 0000H for a clock divisor value
of (2 X 65536 = 131072).
When the SPI is disabled, the Baud Rate Generator can function as a basic 16-bit timer
with interrupt on time-out. Observe the following procedure to configure the Baud Rate
Generator as a timer with interrupt on time-out:
1. Disable the SPI by clearing the SPIEN bit in the SPI Control Register to 0.
2. Load the appropriate 16-bit count value into the SPI Baud Rate High and Low Byte
registers.
3. Enable the Baud Rate Generator timer function and associated interrupt by setting the
BIRQ bit in the SPI Control Register to 1.
SPI Baud Rate (bits/s) System Clock Frequency (Hz)
2 BRG[15:0]
------------------------------------------------------------------------
=
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When configured as a general purpose timer, the interrupt interval is calculated using the
following equation:
SPI Control Register Definitions
This section defines the features of the following Serial Peripheral Interface registers.
SPI Data Register: see page 121
SPI Control Register: see page 122
SPI Status Register: see page 123
SPI Mode Register: see page 125
SPI Diagnostic State Register: see page 126
SPI Baud Rate High and Low Byte Registers: see page 126
SPI Data Register
The SPI Data Register, shown in Table 64, stores both the outgoing (transmit) data and the
incoming (receive) data. Reads from the SPI Data Register always return the current con-
tents of the 8-bit shift register. Data is shifted out starting with bit 7. The last bit received
resides in bit position 0.
With the SPI configured as a Master, writing a data byte to this register initiates the data
transmission. With the SPI configured as a Slave, writing a data byte to this register loads
the shift register in preparation for the next data transfer with the external Master. In either
the Master or Slave modes, if a transmission is already in progress, writes to this register
are ignored and the overrun error flag, OVR, is set in the SPI Status Register.
When the character length is less than 8 bits (as set by the NUMBITS field in the SPI
Mode Register), the transmit character must be left justified in the SPI Data Register. A
received character of less than 8 bits is right justified (last bit received is in bit position 0).
For example, if the SPI is configured for 4-bit characters, the transmit characters must be
written to SPIDATA[7:4] and the received characters are read from SPIDATA[3:0].
Interrupt Interval (s) System Clock Period (s) BRG[15:0]=
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SPI Control Register
The SPI Control Register, shown in Table 65, configures the SPI for transmit and receive
operations.
Table 64. SPI Data Register (SPIDATA)
Bit 76543210
Field DATA
RESET X
R/W R/W
Address F60H
Bit Description
[7:0]
DATA Data
Transmit and/or receive data.
Table 65. SPI Control Register (SPICTL)
Bit 76543210
Field IRQE STR BIRQ PHASE CLKPOL WOR MMEN SPIEN
RESET 0
R/W R/W
Address F61H
Bit Description
[7]
IRQE Interrupt Request Enable
0 = SPI interrupts are disabled. No interrupt requests are sent to the Interrupt Controller.
1 = SPI interrupts are enabled. Interrupt requests are sent to the Interrupt Controller.
[6]
STR Start an SPI Interrupt Request
0 = No effect.
1 = Setting this bit to 1 also sets the IRQ bit in the SPI Status Register to 1. Setting this bit
forces the SPI to send an interrupt request to the Interrupt Control. This bit can be used by
software for a function similar to transmit buffer empty in a UART. Writing a 1 to the IRQ bit
in the SPI Status Register clears this bit to 0.
[5]
BIRQ BRG Timer Interrupt Request
If the SPI is enabled, this bit has no effect. If the SPI is disabled:
0 = The Baud Rate Generator timer function is disabled.
1 = The Baud Rate Generator timer function and time-out interrupt are enabled.
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SPI Status Register
The SPI Status Register, shown in Table 66, indica tes the current state of the SPI. All bits
revert to their reset state if the SPIEN bit in the SPICTL Register = 0.
[4]
PHASE Phase Select
Sets the phase relationship of the data to the clock. For more information about operation of
the PHASE bit, see the SPI Clock Phase and Polarity Control section on page 116.
[3]
CLKPOL Clock Polarity
0 = SCK idles Low (0).
1 = SCK idle High (1).
[2]
WOR Wire-OR (OPEN-DRAIN) Mode Enabled
0 = SPI signal pins not configured for open-drain.
1 = All four SPI signal pins (SCK, SS, MISO, MOSI) configured for open-d rain function. This
setting is typically used for multimaster and/or multislave configurations.
[1]
MMEN SPI Master Mode Enable
0 = SPI configured in SLAVE Mode.
1 = SPI configured in MASTER Mode.
[0]
SPIEN SPI Enable
0 = SPI disabled.
1 = SPI enabled.
Table 66. SPI Status Register (SPISTAT)
Bit 7 6 5 4 3 2 1 0
Field IRQ OVR COL ABT Reserved TXST SLAS
RESET 01
R/W R/W* R
Address F62H
Note: R/W* = Read access. Write a 1 to clear the bit to 0.
Bit Description
[7]
IRQ Interrupt Request
If SPIEN = 1, this bit is set if the STR bit in the SPICTL Register is set, or upon completion of
an SPI master or slave transaction. This bit does not set if SPIEN = 0 and the SPI Baud Rate
Generator is used as a timer to generate the SPI interrupt.
0 = No SPI interrupt request pending.
1 = SPI interrupt request is pending.
[6]
OVR Overrun
0 = An overrun erro r ha s no t occ ur re d.
1 = An overrun erro r ha s be en de te cte d.
Bit Description (Continued)
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[5]
COL Collision
0 = A multimaster collision (mode fault) has not occurred.
1 = A multimaster collision (mode fault) has been detected.
[4]
ABT Slave Mode Tran s ac ti on Ab ort
This bit is set if the SPI is configured in slave mode, a transa ctio n is occu r rin g and SS deas-
serts before all bits of a character have bee n tr an sfer re d as de fin e d by th e NUM BIT S field of
the SPIMODE Register. The IRQ bit also sets, indicating the transaction has completed.
0 = A slave mode transaction abort has not occurred.
1 = A slave mode transaction abort has been detected.
[3:2] Reserved
These bits are reserved and must be programmed to 00.
[1]
TXST Transmit Status
0 = No data transmission currently in progress.
1 = Data transmission currently in progress.
[0]
SLAS Slave Select
If SPI enabled as a Slave, then the following conditions are tr ue:
0 = SS input pin is asserted (Low).
1 = SS input is not asserted (High).
If SPI enabled as a Master, this bit is not applicable.
Bit Description (Continued)
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SPI Mode Register
The SPI Mode Register, shown in Table 67, configures the character bit width and the
direction and value of the SS pin.
Table 67. SPI Mode Register (SPIMODE)
Bit 76543210
Field Reserved DIAG NUMBITS[2:0] SSIO SSV
RESET 0
R/W RR/W
Address F63H
Bit Description
[7:6] Reserved
These bits are reserved and must be programmed to 00.
[5]
DIAG Diagnostic Mode Control bit
This bit is for SPI diagnostics. Setting this bit allows the Baud Rate Generator value to be
read using the SPIBRH and SPIBRL Register locations.
0 = Reading SPIBRH, SPIBRL returns the value in the SPIBRH and SPIBRL registers.
1 = Reading SPIBRH returns bits [15:8] of the SPI Baud Rate Generator; and reading
SPIBRL returns bits [7:0] of the SPI Baud Ra te Counter . The Baud Rate Counter High
and Low byte values are not buffered.
Caution: Exercise caution if reading the values while the BRG is counting.
[4]
NUMBITS[2:0]
Number of Data Bits Per Character to Transfer
This field contains the number of bits to shift for each character transfer. For information
about valid bit positions when the character length is less than 8 bits, see the SPI Data
Register (SPIDATA) description.
000 = 8 bits.
001 = 1 bit.
010 = 2 bits.
011 = 3 bits.
100 = 4 bits.
101 = 5 bits.
110 = 6 bits.
111 = 7 bits.
[1]
SSIO Slave Select I/O
0 = SS pin configured as an input.
1 = SS pin configured as an output (Master mode only).
[0]
SSV Slave Select Value
If SSIO = 1 and SPI is configured as a Master, the following conditions are true:
0 = SS pin driven Low (0).
1 = SS pin driven High (1).
This bit has no effect if SSIO = 0 or if SPI is configured as a Slave.
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SPI Diagnostic State Register
The SPI Diagnostic State Register, shown in Table 68, provides observability of internal
state. This register is a read-only register that is used for SPI diagnostics.
SPI Baud Rate High and Low Byte Registers
The SPI Baud Rate High and Low Byte registers, shown in Tables 69 and 70, combine to
form a 16-bit reload value, BRG[15:0], for the SPI Baud Rate Generator.
When configured as a general purpose timer, the SPI BRG interrupt interval is calculated
using the following equation:
Table 68. SPI Diagnostic State Register (SPIDST)
Bit 76543210
Field SCKEN TCKEN SPISTATE
RESET 0
R/W R
Address F64H
Bit Description
[7]
SCKEN Shift Clock Enable
0 = The internal Shift Clock Enable signal is deas serted.
1 = The internal Shift Clock Enable signal is asserted (shift register is updates on next sys-
tem clock).
[6]
TCKEN Transmit Clock Enable
0 = The internal Transmit Clock Enable signal is deasserted.
1 = The internal Transmit Clock Enable signal is asserted. When this is asserted the serial
data out is updated on the next system clock (MOSI or MISO).
[5:0]
SPISTATE SPI State Machine
Defines the current state of the internal SPI State Machine.
SPI BRG Interrupt Interval (s) System Clock Period (s) BRG[15:0]=
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Table 69. SPI Baud Rate High Byte Register (SPIBRH)
Bit 76543210
Field BRH
RESET 1
R/W R/W
Address F66H
Bit Description
[7:0]
BRH SPI Baud Rate High Byte
Most significant byte, BRG[15:8], of the SPI Baud Rate Generator’s reload value.
Table 70. SPI Baud Rate Low Byte Register (SPIBRL)
Bit 76543210
Field BRL
RESET 1
R/W R/W
Address F67H
Bit Description
[7:0]
BRL SPI Baud Rate Low Byte
Least significant byte, BRG[7:0], of the SPI Baud Rate Generator’s reload value.
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I2C Controller
The I2C Controller makes the Z8 Encore! XP F64xx Series products bus-compatible with
the I2C protocol. The I2C Controller consists of two bidirectional bus lines: a serial data
signal (SDA) and a serial clock signal (SCL). Features of the I2C Controller include:
•
Transmit and Receive Operation in MASTER Mode
•
Maximum data rate of 400 kilobit/sec
•
7- and 10-bit addressing modes for Slaves
•
Unrestricted number of data bytes transmitted per transfer
The I2C Controller in the Z8 Encore! XP F64xx Series products does not operate in
SLAVE Mode.
Architecture
Figure 27 displays the architecture of the I2C Controller.
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Operation
The I2C Controller operates in MASTER Mode to transmit and receive data. Only a single
master is supported. Arbitration between two masters must be accomplished in software.
I2C supports the following operations:
•
Master transmits to a 7-bit slave
•
Master transmits to a 10-bit slave
•
Master receives from a 7-bit slave
•
Master receives from a 10-bit slave
Figure 27. I2C Controller Block Diagram
SDA
SCL
I2CCTL
ISHIFT
I2CDATA
I2CBRH
I2CBRL
Shift
Load
Tx/Rx State Machine
Baud Rate Generator
Receive
I2CSTAT
Register Bus
I2C Interrupt
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SDA and SCL Signals
I2C sends all addresses, data and acknowledge signals over the SDA line, most significant
bit first. SCL is the common clock for the I2C Controller. When the SDA and SCL pin
alternate functions are selected for their respective GPIO ports, the pins are automatically
configured for open-drain operation.
The master (I2C) is responsible for driving the SCL clock signal, although the clock signal
can become skewed by a slow slave device. During the low period of the clock, the slave
pulls the SCL signal Low to suspend the transaction. The master releases the clock at the
end of the low period and notices that the clock remains low instead of returning to a High
level. When the slave releases the clock, the I2C Controller continues the transaction. All
data is transferred in bytes and there is no limit to the amount of data transferred in one
operation. When transmitting data or acknowledging read data from the slave, the SDA
signal changes in the middle of the low period of SCL and is sampled in the middle of the
High period of SCL.
I2C Interrupts
The I2C Controller contains four sources of interrupts—Transmit, Receive, Not Acknowl-
edge and baud rate generator. These four interrupt sources are combined into a single
interrupt request signal to the Interrupt Controller. The transmit interrupt is enabled by the
IEN and TXI bits of the Control Register. The Receive and Not Acknowledge interrupts
are enabled by the IEN bit of the Control Register. The baud rate generator interrupt is
enabled by the BIRQ an d IEN bits of the Control Register.
Not Acknowledge interrupts occur when a Not Acknowledge condition is received from
the slave or sent by the I2C Controller and neither the start or stop bit is set. The Not
Acknowledge event sets the NCKI bit of the I2C Status Register and can only be cleared
by setting the start or stop bit in the I2C Control Register. When this interrupt occurs, the
I2C Controller waits until either the stop or start bit is set before performing any action. In
an interrupt service routine, the NCKI bit should always be checked prior to servicing
transmit or receive interrupt conditions because it indicates the transaction is being termi-
nated.
Receive interrupts occur when a byte of data has been received by the I2C Controller
(master reading data from slave). This procedure sets the RDRF bit of the I2C Status Reg-
ister. The RD RF bit is cleared by reading the I2C Data Register. The RDRF bit is set dur-
ing the acknowledge phase. The I2C Controller pauses after the acknowledge phase until
the receive interrupt is cleared before performing any other action.
Transmit interrupts occur when the TDRE bit of the I2C Status Register sets and the TXI
bit in the I2C Control Register is set. transmit interrupts occur under the following condi-
tions when the transmit data register is empty:
•
The I2C Controller is enabled
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•
The first bit of the byte of an address is shifting out and the RD bit of the I2C Status
Register is deasserted.
•
The first bit of a 10-bit address shifts out
•
The first bit of write data shifts out
W riting to the I2C Data Register always clears the TRDE bit to 0. When TDRE is asserted,
the I2C Controller pauses at the begin ning of the Acknowledge cy cle of the by te currently
shifting out. It does not resume until the Data Register is written with the next value to
send or until the stop or start bits are set, indicating that the current byte is the last one to
send.
The fourth interrupt source is the baud rate generator. If the I2C Controller is disabled
(IEN bit in the I2CCTL Register = 0) and the BIRQ bit in the I2CCTL Register = 1, an
interrupt is generated when the baud rate generator counts down to 1. This allows the I2C
baud rate generator to be u sed by software as a general purpose timer when IEN = 0.
Software Control of I2C Transactions
Software can control I2C transactions by using the I 2C Controller interrupt, by polling the
I2C Status Register or by DMA. Note that not all products include a DMA Controller.
To use interrupts, the I2C interrupt must be enabled in the Interrupt Controller . The TXI bit
in the I2C Control Register must be set to enable transmit interrupts.
To control transactions by polling, the interrupt bits (TDRE, RDRF and NCKI) in the I2C
Status Register should be polled. The TDRE bit asserts regardless of the state of the TXI
bit.
Either or both transmit and receiv e data movement can be controlled by the DMA Control-
ler. The DMA Controller channel(s) must be initialized to select the I2C transmit and
receive requests. Transmit DMA requests require that the TXI bit in the I2C Control Reg-
ister be set.
A transmit (write) DMA operation hangs if the slave responds with a Not Acknowledge
before the last byte has been sent. After receiving the Not Acknowledge, the I2C Control-
ler sets the NCKI bit in the St atus Register and pauses until either the stop or start bits in
the Control Register are set.
For a receive (read) DMA transaction to send a Not Acknowledge on the last byte, the
receive DMA must be set up to receive n-1 bytes, then software must set the NAK bit and
receive the last (nth) byte directly.
Note:
Caution:
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Start and Stop Conditions
The master (I2C) drives all Start and Stop signals and initiates all transactions. To start a
transaction, the I2C Controller generates a start condition by pulling the SDA signal Low
while SCL is High. To complete a transaction, the I2C Controller genera tes a Stop condi-
tion by creating a low-to-High transition of the SDA signal while the SCL signal is High.
The start and stop bits in the I2C Control Register control the sending of the Start and S top
conditions. A master is also a llowed to end one transaction and begin a new one by issuing
a Restart. This is accomplished by setting the start bit at the end of a transaction, rather
than the stop bit. Note that the Start condition not sent until the start bit is set and data has
been written to the I2C Data Register.
Master Write and Read Transactions
The following sections provide a recommended procedure for performing I2C write and
read transactions from the I2C Controller (master) to slave I2C devices. In general soft-
ware should rely on the TDRE , RDRF and NCKI bits of the status register (these bits gen-
erate interrupts) to initiate software actions. When using i nterrupts or DMA, the TXI bit is
set to start each transaction and cleared at the end of each transaction to eliminate a trail-
ing transmit interrupt.
Caution should be used in using the ACK status bit within a transaction because it is diffi-
cult for software to tell when it is updated by hardware.
When writing data to a slave, the I2C pauses at the beginning of the Acknowledge cycle if
the data register has not been written with the next value to be sent (TDRE bit in the I2C
Status Register = 1). In this scenario where software is not keeping up with the I2C bus
(TDRE asserted longer than one byte time), the Acknowledge clock cycle for byte n is
delayed until the Data Register is written with byte n + 1, and appears to be grouped with
the data clock cycles for byte n+1. If either the start or stop bit is set, the I2C does not
pause prior to the Acknowledge cycle because no additional data is sent.
When a Not Acknowledge condition is received during a write (either during the address
or data phases), the I2C Controller generates the Not Acknowledge interrupt (NCKI = 1)
and pause until either the stop or start bit is set. Unless the Not Acknowledge was received
on the last byte, the Data Register will already have been written with the next address or
data byte to send. In this case the flush bit of the Control Register should be set at the same
time the stop or start bit is set to remove the stale transmit data and enable subsequent
transmit interrupts.
When reading data from the slave, the I2C pauses after the data Acknowledge cycle until
the receive interrupt is serviced and the RDRF bit of the status register is cleared by read-
ing the I2C Data Register. Once the I2C data register has been read, the I2C reads the next
data byte.
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Address Only Transaction with a 7-bit Address
In the situation where software determines if a slave with a 7-bit address is responding
without sending or receiving data, a transaction can be done which only consists of an
address phase. Figure 28 displays this addr ess o nly transaction to determine if a slave with
a 7-bit address will acknowledge. As an example, this transaction can be used after a write
has been performed to an EEPROM to determine when the EEPROM completes its inter-
nal write operation and is again responding to I2C transactions. If the slave does not
Acknowledge, the transaction can be repeated until the slave does Acknowledge.
Observe the following procedure for an address only transaction to a 7-bit addressed slave:
1. Software asserts the IEN bit in the I2C Control Register.
2. Software asserts the TXI bit of the I2C Control Register to enable transmit interrupts.
3. The I2C interrupt asserts, because the I2C Data Register is empty (TDRE = 1)
4. Software responds to the TDRE bit by writing a 7-bit slave address plus write bit (= 0)
to the I2C Data Register. As an alternative this could be a read operation instead of a
write operation.
5. Software sets the start and stop bits of the I2C Control Register and clears the TXI bit.
6. The I2C Controller sends the start condition to the I2C slave.
7. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister.
8. Software polls the stop bit of the I2C Control Register. Hardware deasserts the stop bit
when the address only transaction is completed.
9. Software checks the ACK bit of the I2C Status Register. If the slave acknowledged,
the ACK bit is = 1. If the slave does not acknowledge, the ACK bit is = 0. The NCKI
interrupt does not occur in the not acknowledge case because the stop bit was set.
Write Transaction with a 7-Bit Address
Figure 29 displays the data transfer format for a 7-bit addressed slave. Shaded regions
indicate data transferred from the I2C Controller to slaves and unshaded regions indicate
data transferred from the slaves to the I2C Controller.
SSlave Address W = 0 A/A P
Figure 28. 7-Bit Address Only Transaction Format
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Observe the following procedure for a transmit operation to a 7-bit addressed slave:
1. Software asserts the IEN bit in the I2C Control Register.
2. Software asserts the TXI bit of the I2C Control Register to enable transmit interrupts.
3. The I2C interrupt asserts, because the I2C Data Register is empty
4. Software responds to the TDRE bit by writing a 7-bit slave address plus write bit (=0)
to the I2C Data Register.
5. Software asserts the start bit of the I2C Control Register.
6. The I2C Controller sends the start condition to the I2C slave.
7. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister.
8. After one bit of address has been shifted out by the SDA signal, the transmit interrupt
is asserted (TDRE = 1).
9. Software responds by writing the transmit data into the I2C Data Register.
10. The I2C Controller shifts the rest of the address and write bit out by the SDA signal.
11. If the I2C slave sends an acknowledge (by pulling the SDA signal Low) during the
next High period of SCL the I2C Controller sets the ACK bit in the I2C Status Regis-
ter. Continue with Step 12.
If the slave does not acknowledge, the Not Acknowledge interrupt occurs (NCKI bit is
set in the Status Register, ACK bit is cleared). Software responds to the Not Acknowl-
edge interrupt by setting the stop and flush bits and clearing the TXI bit. The I2C Con-
troller sends the stop condition on the bus and clears the stop and NCKI bits. The
transaction is complete (ignore the following steps).
12. The I2C Controller loads the contents of the I2C Shift Register with the contents of the
I2C Data Register.
13. The I2C Controller shifts the data out of using the SDA signal. After the first bit is
sent, the transmit interrupt is asserted.
14. If more bytes remain to be sent, return to Step 9.
15. Software responds by setting the stop bit of th e I2C Control Register (or start bit to ini-
tiate a new transaction). In the stop case, software clears the TXI bit of the I2C Control
Register at the same time.
SSlave Address W = 0 A Data A Data A Data A/A P/S
Figure 29. 7-Bit Addressed Slave Data Transfer Format
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16. The I2C Controller completes transmission of the data on the SDA signal.
17. The slave may either Acknowledge or Not Acknowledge the last byte. Because either
the stop or start bit is already set, the NCKI interrupt does not occur.
18. The I2C Controller sends the stop (or RESTAR T) condition to the I2C bus. The stop or
start bit is cleared.
Address Only Transaction with a 10-bit Address
In the situation where software wants to determine if a slave with a 10-bit address is
responding without sending or receiving data, a transaction can be done which only con-
sists of an address phase. Figure 30 displays this address only transaction to determine if a
slave with 10-bit address will acknowledge. As an example, this transaction can be us ed
after a write has been performed to an EEPROM to determine when the EEPROM com-
pletes its internal write operation and is again responding to I2C transactions. If the slave
does not Acknowledge the transaction can be repeated until the slave is able to Acknowl-
edge.
Observe the following procedure for an address only transaction to a 10-bit addressed
slave:
1. Software asserts the IEN bit in the I2C Control Register.
2. Software asserts the TXI bit of the I2C Control Register to enable transmit interrupts.
3. The I2C interrupt asserts, because the I2C Data Register is empty (TDRE = 1)
4. Software responds to the TDRE interrupt by writing the first slave address byte. The
least significant bit must be 0 for the write operation.
5. Software asserts the start bit of the I2C Control Register.
6. The I2C Controller sends the start condition to the I2C slave.
7. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister.
8. After one bit of address is shifted out by the SDA signal, the transmit interrupt is
asserted.
9. Software responds by writing the second byte of address into the contents of the I2C
Data Register.
SSlave Address
1st 7 bits W = 0 A/A Slave Address
2nd Byte A/A P
Figure 30. 10-Bit Address Only Transaction Format
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10. The I2C Controller shifts the rest of the first byte of address and write bit out the SDA
signal.
1 1 . If the I2C slave sends an acknowledge by pulling the SDA signal Low during the next
High period of SCL the I2C Controller sets the ACK bit in the I2C Status Register.
Continue with Step 12.
If the slave does not acknowledge the first address byte, the I2C Controller sets the
NCKI bit and clears the ACK bit in the I2C Status Register. Software responds to the
Not Acknowledge interrupt by setting the stop and flush bits and clearing the TXI bit.
The I2C Controller sends the stop condition on the bus and clears the stop and NCKI
bits. The transaction is complete (ignore following steps).
12. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister (2nd byte of address).
13. The I2C Controller shifts the second address byte out the SDA signal. After the first
bit has been sent, the transmit interrupt is asserted.
14. Software responds by setting the stop bit in the I2C Control Register. The TXI bit can
be cleared at the same time.
15. Software polls the stop bit of the I2C Control Register . Hardware deasserts the stop bit
when the transaction is completed (stop condition has been sent).
16. Software checks the ACK bit of the I2C Status Register. If the slave acknowledged,
the ACK bit is = 1. If the slave does not acknowledge, the ACK bit is = 0. The NCKI
interrupt do not occur because the stop bit was set.
Write Transaction with a 10-Bit Address
Figure 31 displays the data transfer format for a 10-bit addressed slave. Shaded regions
indicate data transferred from the I2C Controller to slaves and unshaded regions indicate
data transferred from the slaves to the I2C Controller.
The first seven bits transmitted in the first byte are 11110XX. The two bits XX are the two
most significant bits of the 10-bit address. The lowest bit of the first byte transferred is the
read/write control bit (=0). The transmit operation is carried out in the same manner as 7-
bit addressing.
Observe the following procedure for a transmit operation on a 10-bit addressed slave:
1. Software asserts the IEN bit in the I2C Control Register.
SSlave Address
1st 7 bits W = 0 A Slave Address
2nd Byte AData A Data A/A P/S
Figure 31. 10-Bit Addressed Slave Data Transfer Format
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2. Software asserts the TXI bit of the I2C Control Register to enable transmit interrupts.
3. The I2C interrupt asserts because the I2C Data Register is empty.
4. Software responds to the TDRE interrupt by writing the first slave address byte to the
I2C Data Register. The least significant bit must be 0 for the write operation.
5. Software asserts the start bit of the I2C Control Register.
6. The I2C Controller sends the start condition to the I2C slave.
7. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister.
8. After one bit of address is shifted out by the SDA signal, the transmit interrupt is
asserted.
9. Software responds by writing the second byte of address into the contents of the I2C
Data Register.
10. The I2C Controller shifts the rest of the first byte of address and write bit out the SDA
signal.
11. If the I2C slave acknowledges the first address byte by pulling the SDA signal Low
during the next High period of SCL, the I2C Controller sets the ACK bit in the I2C
Status Register. Continue with Ste p 12.
If the slave does not acknowledge the first address byte, the I2C Controller sets the
NCKI bit and clears the ACK bit in the I2C Status Register. Software responds to the
Not Acknowledge interrupt by setting the stop and flush bits and clearing the TXI bit.
The I2C Controller sends the stop condition on the bus and clears the stop and NCKI
bits. The transaction is complete (ignore the following steps).
12. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister.
13. The I2C Controller shifts the second address byte out the SDA signal. After the first
bit has been sent, the transmit interrupt is asserted.
14. Software responds by writing a data byte to the I2C Data Register.
15. The I2C Controller completes shifting the contents of the shift register on the SDA
signal.
16. If the I2C slave sends an acknowledge by pulling the SDA signal Low during the next
High period of SCL, the I2C Controller sets the ACK bit in the I2C Status Regi ster.
Continue with Step 17.
If the slave does not acknowledge the second address byte or one of the data bytes, the
I2C Controller sets the NCKI bit and clears the ACK bit in the I2C Status Register.
Software responds to the Not Acknowledge interrupt by setting the stop and flush bits
and clearing the TXI bit. The I2C Controller sends the stop condition on the bus and
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clears the stop and NCKI bits. The transaction is complete (ignore the following
steps).
17. The I2C Controller shifts the data out by the SDA signal. After the first bit is sent, the
transmit interrupt is asserted.
18. If more bytes remain to be sent, return to Step 14.
19. If the last byte is currently being sent, software sets the stop bit of the I2C Control
Register (or start bit to initiate a new transaction). In the stop case, software also clears
the TXI bit of the I2C Control Register at the same time.
20. The I2C Controller completes transmission of the last data byte on the SDA signal.
21. The slave may either Acknowledge or Not Acknowledge the last byte. Because either
the stop or start bit is already set, the NCKI interrupt does not occur.
22. The I2C Controller sends the stop (or RESTART) condition to the I2C bus and clears
the stop (or start) bit.
Read Transaction with a 7-Bit Address
Figure 32 displays the data transfer format for a read operation to a 7-bit addressed slave.
The shaded regions indicate data transferred from the I2C Controller to slaves and
unshaded regions indicate data transferred from the slaves to the I2C Controller.
Observe the following procedure for a read operation to a 7-bit addressed slave:
1. Software writes the I2C Data Register with a 7-bit slave address plus the read bit (= 1).
2. Software asserts the start bit of the I2C Control Register.
3. If this is a single byte transfer , Software asserts the NAK bit of the I2C Control Regis-
ter so that after the first byte of data has been read by the I2C Controller, a Not
Acknowledge is sent to the I2C slave.
4. The I2C Controller sends the start condition.
5. The I2C Controller shifts the address and read bit out the SDA signal.
6. If the I2C slave acknowledges the address by pulling the SDA signal Low during the
next High period of SCL, the I2C Controller sets the ACK bit in the I2C Status Regis-
ter. Continue with Step 7.
If the slave does not acknowledge, the Not Acknowledge interrupt occurs (NCKI bit is
SSlave Address R = 1 A Data ADataAP/S
Figure 32. Receive Data Transfer Format for a 7-Bit Addressed Slave
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set in the Status Register, ACK bit is cleared). Software responds to the Not Acknowl-
edge interrupt by setting the stop bit and clearing the TXI bit. The I2C Controller
sends the stop condition on the bus and clears the stop and NCKI bits. The transaction
is complete (ignore the following steps).
7. The I2C Controller shifts in the byte of data from the I2C slave on the SDA signal. The
I2C Controller sends a Not Acknowledge to the I2C slave if the NAK bit is set (last
byte), else it sends an Acknowle dge.
8. The I2C Controller asserts the receive interrupt (RDRF bit set in the Status Register).
9. Software responds by readin g the I2C Data Register which clears the RDRF bit. If
there is only one more byte to receive, set the NAK bit of the I2C Control Register.
10. If there are more bytes to transfer, return to Step 7.
11. After the last byte is shifted in, a Not Acknowledge interrupt is generated by the I2C
Controller.
12. Software responds by setting the stop bit of the I2C Control Register.
13. A stop condition is sent to the I2C slave, the stop and NCKI bits are cleared.
Read Transaction with a 10-Bit Address
Figure 33 displays the read transaction format for a 10-bit addressed slave. The shaded
regions indicate data transferred from the I2C Controller to slaves and unshaded regions
indicate data transferred from the slaves to the I2C Controller.
The first seven bits transmitted in the first byte are 11110XX. The two (XX) bits are the two
most significant bits of the 10-bit address. The lowest bit of the first byte transferred is the
write control bit.
Observe the following procedure for the data transfer for a read operation to a 10-bit
addressed slave:
1. Software writes 11110B followed by the two address bits and a 0 (write) to the I2C
Data Register.
2. Software asserts the start and TXI bits of the I2C Control Register.
3. The I2C Controller sends the Start condition.
4. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister.
SSlave Address
1st 7 bits W=0 A Slave Address
2nd Byte ASSlave Address
1st 7 bits R=1 A Data ADataA P
Figure 33. Receive Data Format for a 10-Bit Addres sed Slave
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5. After the first bit has been shifted out, a transmit interrupt is asserted.
6. Software responds by writing the lower eight bits of address to the I2C Data Register.
7. The I2C Controller completes shifting of the two address bits and a 0 (write).
8. If the I2C slave acknowledges the first address byte by pulling the SDA signal Low
during the next High period of SCL, the I2C Controller sets the ACK bit in the I2C
Status Register. Continue with Ste p 9.
If the slave does not acknowledge the first address byte, the I2C Controller sets the
NCKI bit and clears the ACK bit in the I2C Status Register. Software responds to the
Not Acknowledge interrupt by setting the stop and flush bits and clearing the TXI bit.
The I2C Controller sends the stop condition on the bus and clears the stop and NCKI
bits. The transaction is complete (ignore following steps).
9. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister (second address byte).
10. The I2C Controller shifts out the second address byte. After the first bit is shifted, the
I2C Controller generates a transmit interrupt.
11. Software responds by setting the start bit of the I2C Control Register to generate a
repeated start by clearing the TXI bit.
12. Software responds by writing 11110B followed by the 2-bit slave address and a 1
(read) to the I2C Data Register.
13. If only one byte is to be read, software sets the NAK bit of the I2C Control Register.
14. After the I2C Controller shifts out the 2nd address byte, the I2C slave sends an
acknowledge by pulling the SDA signal Low during the next High period of SCL, the
I2C Controller sets the ACK bit in the I2C Status Register. Continue with Step 15.
If the slave does not acknowledge the second address byte, the I2C Controller sets the
NCKI bit and clears the ACK bit in the I2C Status Register. Software responds to the
Not Acknowledge interrupt by setting the stop and flush bits and clearing the TXI bit.
The I2C Controller sends the stop condition on the bus and clears the stop and NCKI
bits. The transaction is complete (ignore the following steps).
15. The I2C Controller sends the repeated start condition.
16. The I2C Controller loads the I2C Shift Register with the contents of the I2C Data Reg-
ister (third address transfer).
17. The I2C Controller sends 11110B followed by the two most significant bits of the
slave read address and a 1 (read).
18. The I2C slave sends an acknowledge by pulling the SDA signal Low during the next
High period of SCL
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If the slave were to Not Acknowledge at this point (this should not happen because the
slave did acknowledge the first two address bytes), software would respond by setting
the stop and flush bits and clearing the TXI bit. The I 2C Controller sends the stop con-
dition on the bus and clears the stop and NCKI bits. The transaction is complete
(ignore the following steps).
19. The I2C Controller shifts in a byte of data from the I2C slave on the SDA signal. The
I2C Controller sends a Not Acknowledge to the I2C slave if the NAK bit is set (last
byte), else it sends an Acknowle dge.
20. The I2C Controller asserts the receive interrupt (RDRF bit set in the Status Register).
21. Software responds by reading th e I2C Data Register which clears the RDRF bit. If
there is only one more byte to receive, set the NAK bit of the I2C Control Register.
22. If there are one or more bytes to transfer, return to Step 19.
23. After the last byte is shifted in, a Not Acknowledge interrupt is generated by the I2C
Controller.
24. Software responds by setting the stop bit of the I2C Control Register.
25. A stop condition is sent to the I2C slave and the stop and NCKI bits are cleared.
I2C Control Register Definitions
This section defines the features of the following I2C Control registers.
I2C Data Register: see page 141
I2C St atus Register: see page 142
I2C Control Register: see page 144
I2C Baud Rate High and Low Byte Registers: see page 145
I2C Diagnostic State Register: see page 147
I2C Diagnostic Control Register: see page 149
I2C Data Register
The I2C Data Register, shown in Table 71, holds the data that is to be loaded into the I2C
Shift Register during a write to a slave. This register also holds data that is loaded from the
I2C Shift Register during a read from a slave. The I2C Shift Register is not accessible in
the Register File address space, but is used only to buffer incoming and outgoing data.
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I2C Status Register
The read-only I2C Status Register, shown in Table 72, indicates the status of the I2C Con-
troller.
Table 71. I2C Data Register (I2CDATA)
Bit 76543210
Field DATA
RESET 0
R/W R/W
Address F50H
Table 72 . I2C Status Register (I2CSTAT)
Bit 76543210
Field TDRE RDRF ACK 10B RD TAS DSS NCKI
RESET 10
R/W R
Address F51H
Bit Description
[7]
TDRE Transmit Data Register Empty
When the I2C Controller is enabled, this bit is 1 when the I2C Data Register is empty. When this
bit is set, an interrupt is generated if the TXI bit is set, except when the I2C Controller is shifting
in data dur ing the recep tion of a byte or when shif ting an address an d the RD bit is set. This bit
is cleared by writing to the I2CDATA Register.
[6]
RDRF Receive Data Register Full
This bit is set = 1 when the I2C Controller is enabled an d the I2C Controller has received a byte
of data. When asserted, this bit causes the I2C Controller to generate an interrupt. This bit is
cleared by reading the I2C Data Register (unless the read is perfor med using execution of the
On-Chip Debugger’s Read Register command).
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[5]
ACK Acknowledge
This bit indicates the st atus of the Acknowledg e for the last byte transmitted or received. When
set, this bit indicates that an Acknowledge occurred for the last byte transmitted or received.
This bit is cleared when IEN = 0 or when a Not Acknowledge occu rre d for the last byte trans-
mitted or received. It is not reset at the beginning of each tr ansaction and is not reset when this
register is read.
Caution: When making decisions based on this bit within a tr ansa cti on, s of t ware cann ot deter-
mine when the bit is updated by hardware. In the case of write transactions, the I2C pauses at
the beginning of the Acknowledge cycle if the next transmit data or address byte has not been
written (TDRE = 1) and stop and start = 0. In this case the ACK bit is not updated until the
transmit interrupt is serviced and the Acknowledge cycle for the previous byte completes. For
examples of how the ACK bit can be used, see the Address Only Transaction with a 7-bit
Address section on page 133 and the Address Only Transaction with a 10-bit Address section
on page 135.
[4]
10B 10-Bit Address
This bit indicates whether a 10- or 7- bit add re ss is being transmitted. After the st art bit is set, if
the five most significant bits of the address are 11110B, this bit is set. When set, it is reset
once the first byte of the address has been sent.
[3]
RD Read
This bit indicates the direction of transfer of the data. It is active High during a read. The status
of this bit is determined by the least significant bit of the I
2
C Shift Register after the start bit is
set.
[2]
TAS Transmit Address State
This bit is active High while the address is being shifted out of the I2C Shift Register.
[1]
DSS Data Shift State
This bit is active High while data is being shifted to or from the I2C Shift Register.
[0]
NCKI NACK Interrupt
This bit is set High when a Not Acknowledge condition is received or sent and neither the st art
nor the stop bit is active. When set, this bit generates an interrupt that can only be cleared by
setting the start or stop bit, allowing you to specify whether to perform a stop or a repeated
start.
Bit Description (Continued)
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I2C Control Register
The I2C Control Register, shown in Table 73, enables I2C operation.
Table 73. I2C Control Register (I2CCTL)
Bit 76543210
Field IEN START STOP BIRQ TXI NAK FLUSH FILTEN
RESET 0
R/W R/W R/W1 R/W1 R/W R/W R/W1 W1 R/W
Address F52H
Bit Description
[7]
IEN I2C Enable
1 = The I2C transmitter and receiver are enabled.
0 = The I2C transmitter and receiver are disabled.
[6]
START Send Start Condition
This bit sends the Start condition. Once asserted, it is cleared by the I2C Controller after it
sends the START condition or if the IEN bi t is deasserted. If this bit is 1, it ca nnot be cl eared to
0 by writing to the register. After this bit is set, the Start condition is sent if there is data in the
I2C Data Register or I2C Shift Register. If there is no data in one of these registers, the I2C
Controller waits until the Data Register is written. If this bit is set while the I2C Controller is
shifting out dat a, it gener ates a st art con dition af ter the byte sh if t s and the acknowledge p hase
completes. If the stop bit is also set, it also waits until the stop condition is sent before the
sending the start condition.
[5]
STOP Send Stop Condition
This bit causes the I2C Controller to issue a Stop condition after the byte in the I2C Shift Regis-
ter has completed transmission or after a byte has been received in a receive operation. AFter
it is set, this bit is reset by the I2C Controller after a Stop condition has been sent or by deas-
serting the IEN bit. If this bit is 1, it cannot be cleared to 0 by writing to the register.
[4]
BIRQ Baud Rate Generator Interrupt Request
This bit allows the I2C Controller to be used as an additional timer when the I2C Controller is
disabled. This bit is ignored when the I2C Controller is enabled.
1 = An interrupt occurs every time the baud rate generator counts down to one.
0 = No baud rate generator interrupt occurs.
[3]
TXI Enable TDRE Interrupts
This bit enables the transmit interrupt when the I2C Data Register is empty (TDRE = 1).
1 = Transmit interrupt (and DMA transmit request) is enabled.
0 = Transmit interrupt (and DMA transmit request) is disabled.
[2]
NAK Send NAK
This bit sends a Not Acknowledge condition after the next byte of data has been read from the
I2C slave. Once asserted, it is deasserted after a Not Acknowledge is sent or the IEN bit is
deasserted. If this bit is 1, it cannot be cleared to 0 by writing to th e regist er.
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I2C Baud Rate High and Low Byte Registers
The I2C Baud Rate High and Low Byte registers, shown in Tables 74 and 75, combine to
form a 16-bit reload value, BRG[15:0], for the I2C Baud Rate Generator.
When the I2C is disabled, the Baud Rate Generator can function as a basic 16-bit timer
with interrupt on time-out. To configure the Baud Rate Generator as a timer with interrupt
on time-out, complete the following procedure:
1. Disable the I2C by clearing the IEN bit in the I2C Control Register to 0.
2. Load the appropriate 16-bit count value into the I2C Baud Rate High and Low Byte
registers.
3. Enable the Baud Rate Generator timer function and associated interrupt by setting the
BIRQ bit in the I2C Control Register to 1.
When configured as a general purpose timer, the interrupt interval is calculated using the
following equation:
[1]
FLUSH Flush Data
Setting this bit to 1 clears the I2C Data Register and sets the TDRE bit to 1. This bit allows
flushing of the I2C Data Register when a Not Acknowledge interrupt is received after the data
has been sent to the I2C Data Register. Reading this bit always returns 0.
[0]
FILTEN I2C Signal Filter Enable
This bit enables low-pass digital filters on the SDA and SCL input signals. These filters reject
any input pulse with periods less than a full system clock cycle. The filters introduce a 3-sys-
tem clock cycle latency on the inputs.
1 = low-pass filters are enabled.
0 = low-pass filters are disabled.
Bit Description (Continued)
Interrupt Interval (s) System Clock Period (s) BRG 15:0=
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Table 74. I2C Baud Rate High Byte Register (I2CBRH)
Bit 76543210
Field BRH
RESET FFH
R/W R/W
Address F53H
Bit Description
[7:0]
BRH I2C Baud Rate High Byte
Most significant byte, BRG[15:8], of the I2C Baud Rate Generator’s reload value.
Note: If the DIAG bit in the I2C Diagnostic Control Register is set to 1, a read of the I2CBRH
Register returns the current value of the I2C Baud Rate Counter[15:8].
Table 75. I2C Baud Rate Low Byte Register (I2CBRL)
Bit 76543210
Field BRL
RESET FFH
R/W R/W
Address F54H
Bit Description
[7:0]
BRL I2C Baud Rate Low Byte
Least significant byte, BRG[7:0], of the I2C Baud Rate Generator’s reload value.
Note: If the DIAG bit in the I2C Diagnostic Control Register is set to 1, a read of the I2CBRL
Register returns the current value of the I2C Baud Rate Counter[7:0].
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I2C Diagnostic State Register
The I2C Diagnostic State Register, shown in Table 76, provides observability into the
internal state. This register is read-only; it is used for I2C diagnostics and manufacturing
test purposes.
Table 76. I2C Diagnostic State Register (I2CDST)
Bit 76543210
Field SCLIN SDAIN STPCNT TXRXSTATE
RESET X0
R/W R
Address F55H
Bit Description
[7]
SCLIN Serial Clock Input
Value of the Serial Clock input signal.
[6]
SDAIN Serial Data Input
Value of the Serial Dat a input signal.
[5]
STPCNT Stop Count
Value of the internal Stop Count control signal.
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[4:0]
TXRXSTATE Internal State
Value of the internal I2C state machine.
TXRXSTATE State Description
0_0000
0_0001
0_0010
0_0011
0_0100
0_0101
0_0110
0_0111
0_1000
0_1001
0_1010
0_1011
0_1100
0_1101
0_1110
0_1111
1_0000
1_0001
1_0010
1_0011
1_0100
1_0101
1_0110
1_0111
1_1000
1_1001
1_1010
1_1011
1_1100
1_1101
1_1110
1_1111
Idle State.
Star t State.
Send/Receive data bit 7.
Send/Receive data bit 6.
Send/Receive data bit 5.
Send/Receive data bit 4.
Send/Receive data bit 3.
Send/Receive data bit 2.
Send/Receive data bit 1.
Send/Receive data bit 0.
Data Acknowledge State.
Second half of data Acknowledge State used only for not acknowledge.
First part of stop state.
Second part of stop state.
10-bit addressing: Acknowledge State for 2nd address byte
7-bit addressing: Address Acknowledge State.
10-bit address: Bit 0 (Least significant bit) o f 2n d address byte
7-bit addres s: Bit 0 (Lea s t significant bit) (R/W) of ad dr es s byt e.
10-bit addressing: Bit 7 (Most significant bit) of 1st address byte.
10-bit addressing: Bit 6 of 1st address byte.
10-bit addressing: Bit 5 of 1st address byte.
10-bit addressing: Bit 4 of 1st address byte.
10-bit addressing: Bit 3 of 1st address byte.
10-bit addressing: Bit 2 of 1st address byte.
10-bit addressing: Bit 1 of 1st address byte.
10-bit addressing: Bit 0 (R/W) of 1st address byte.
10-bit addressing: Acknowledge state for 1st address byte.
10-bit addressing: Bit 7 of 2nd address byte
7-bit addres sin g: Bit 7 of add ress byte.
10-bit addressing: Bit 6 of 2nd address byte
7-bit addres sin g: Bit 6 of add ress byte.
10-bit addressing: Bit 5 of 2nd address byte
7-bit addres sin g: Bit 5 of add ress byte.
10-bit addressing: Bit 4 of 2nd address byte
7-bit addres sin g: Bit 4 of add ress byte.
10-bit addressing: Bit 3 of 2nd address byte
7-bit addres sin g: Bit 3 of add ress byte.
10-bit addressing: Bit 2 of 2nd address byte
7-bit addres sin g: Bit 2 of add ress byte.
10-bit addressing: Bit 1 of 2nd address byte
7-bit addres sin g: Bit 1 of add ress byte.
[4:0]
TXRXSTATE
(continued)
Bit Description (Continued)
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I2C Diagnostic Control Register
The I2C Diagnostic Register, shown in Table 77, provides control over diagnostic modes.
This register is a read/write register that is used for I2C diagnostics purposes.
Table 77. I2C Diagnostic Control Register (I2CDIAG)
Bit 76543210
Field Reserved DIAG
RESET 0
R/W RR/W
Address F56H
Bit Description
[7:1] Reserved
These bits are reserved and must be programmed to 0000000.
[0]
DIAG Diagnostic Control Bit
Selects read back value of the Baud Rate Reload registers.
0 = NORMAL Mode. Reading the Baud Rate High and Low Byte regi sters returns the baud rate
reload value.
1 = DIAGNOSTIC Mode. Reading the Baud Rate High and Low Byte registers returns the baud
rate counter value.
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Direct Memory Access Controller
The Z8 Encore! XP F64xx Series Direct Memory Access (DMA) Controller provides
three independent Direct Memory Access channels. Two of the channels, DMA0 and
DMA1, transfer data between the on-chip peripherals and the Register File. The third
channel, DMA_ADC, controls the ADC operation and transfers SINGLE-SHOT Mode
ADC output data to the Register File.
Operation
DMA0 and DMA1, referred to collectively as DMAx, transfer data either from the on-chip
peripheral control registers to the Register File, or from the Register File to the on-chip
peripheral control registers. The sequence of operations in a DMAx data transfer is:
1. DMAx trigger source requests a DMA data transfer.
2. DMAx requests control of the system bus (address and data) from the eZ8 CPU.
3. After the eZ8 CPU acknowledges the bus request, DMAx transfers either a single byte
or a two-byte word (depend ing upon configuration) and then returns system bus con-
trol to the eZ8 CPU.
4. If the Current Address equals the End Address, then the following conditions are true:
–DMAx reloads the original Start Address
–If configured to generate an interrupt, DMAx sends an interrupt request to the
Interrupt Controller
–If configured for single-pass operation, DMAx resets the DEN bit in the DMAx
Control Register to 0 and the DMA is disabled
If the Current Address does not equal the End Address, then the Current Address
increments by 1 (single-byte transfer) or 2 (two-byte word transfer).
Configuring DMA0 and DMA1 for Data Transfer
Observe the following procedure to configure and enable DMA0 or DMA1:
1. Write to the DMAx I/O Address Register to set the Register File address identifying
the on-chip peripheral control register. The upper nibble of the 12-bit address for on-
chip peripheral control registers is always FH. The full address is {FH,
DMAx_IO[7:0]}.
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2. Determine the 12-bit Start and End Register File addresses. The 12-bit Start Address
is provided by {DMAx_H[3:0], DMA_START[7:0]}. Th e 12-bit End Address is pro-
vided by {DMAx_H[7:4], DMA_END[7:0]}.
3. Write the Start and End Register File address high nibbles to the DMAx End/Start
Address High Nibble Register.
4. W rite the lower byte of the S tart Address to the DMAx S tart/Current Address Register.
5. Write the lower byte of the End Address to the DMAx End Address Register.
6. Write to the DMAx Control Register to complete the following operations:
–Select loop or single-pass mode operation
–Select the data transfer direction (either from the Register File RAM to the on-
chip peripheral control register; or from the on-chip peripheral control register to
the Register File RAM)
–Enable the DMAx interrupt request, if appropriate
–Select Word or Byte mode
–Select the DMAx request trigger
–Enable the DMAx channel
DMA_ADC Operation
DMA_ADC transfers data from the ADC to the Register File. The sequence of operations
in a DMA_ADC data transfer is:
1. ADC completes conversion on the current ADC input channel and signals the DMA
controller that two-bytes of ADC data are ready for transfer.
2. DMA_ADC requests control of the system bus (address and data) from the eZ8 CPU.
3. After the eZ8 CPU acknowledges the bus request, DMA_ADC transfers the two-byte
ADC output value to the Register File and then returns system bus control back to the
eZ8 CPU.
4. If the current ADC analog input is the highest-numbered input to be converted:
–The DMA_A DC resets the ADC analog input number to 0 and initiates data con-
version on ADC analog input 0
–If configured to generate an interrupt, the DMA_ADC sends an interrupt request
to the Interrupt Controller
If the current ADC analog input is not the highest-numbered input to be converted,
then the DMA_ADC initiates data conversion in the next higher-numbered ADC
analog input.
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Configuring DMA_ADC for Data Transfer
Observe the following procedure to configure and enable the DMA_ADC:
1. Write the DMA_ADC Address Register with the 7 most significant bits of the
Register File address for data transfers.
2. Write to the DMA_ADC Control Register to complete the following op eratio ns:
–Enable the DMA_ADC interrupt request, if appropriate
–Select the number of ADC analog inputs to convert
–Enable the DMA_ADC channel
When using the DMA_ADC to perform conversions on multiple ADC inputs, the Ana-
log-to-Digital Converter must be configured for SINGLE-SHOT Mode. If the ADC_IN
field in the DMA_ADC Control Register is greater than 000b, the ADC must be in SIN-
GLE-SHOT Mode.
CONTINUOUS Mode operation of the ADC can only be used in conjunction with the
DMA_ADC if the ADC_IN field in the DMA_ADC Control Register is reset to 000b to
enable conversion on ADC analog input 0 only.
DMA Control Register Definitions
This section defines the features of the following DMA Control registers.
DMAx Control Register: see page 153
DMAx I/O Address Register: see page 154
DMAx Address High Nibble Register: see page 155
DMAx Start/Current Address Low Byte Register: see page 156
DMAx End Address Low Byte Register: see page 156
DMA_ADC Address Register: see page 157
DMA_ADC Control Register: see page 158
DMA_ADC Status Register: see page 159
Caution:
PS019924-0113 PREL I M I N A R Y DMA Control Register Definitions
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DMAx Control Register
The DMAx Control Register, shown in Table 78, enables and selects the mode of opera-
tion for DMAx.
Table 78. DMAx Control Register (DMAxCTL)
Bit 76543210
Field DEN DLE DDIR IRQEN WSEL RSS
RESET 0
R/W R/W
Address FB0H, FB8H
Bit Description
[7]
DEN DMAx Enable
0 = DMAx is disabled and data transfer requests are disregarded.
1 = DMAx is enabled and initiates a data transfer upon receipt of a request from the trigger
source.
[6]
DLE DMAx Loop Enable
0 = DMAx reloads the original Start Address and is then d isabled af ter the End Addr ess dat a is
transferred.
1 = DMAx, after the End Address data is transferred, reloads the original Start Address and
continues operating.
[5]
DDIR DMAx Data Transfer Direction
0 = Register File → on-chip peripheral control register.
1 = On-chip peripheral control → Register File.
[4]
IRQEN DMAx Interrupt Enable
0 = DMAx does not generate any interrupts.
1 = DMAx generates an interrupt when the End Address data is transferred.
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DMAx I/O Address Register
The DMAx I/O Address Register, shown in Table 79, contains the low byte of the on-chip
peripheral address for data transfer. The full 12-bit Register File address is provided by
{FH, DMAx_IO[7:0]}. When the DMA is configured for two-byte word transfers, the
DMAx I/O Address Register must contain an even-num bered address.
[3]
WSEL Word Select
0 = DMAx transfers a single byte per request.
1 = DMAx transfers a two-byte word per request. The address for the on-chip peripheral con-
trol register must be an even address.
[2:0]
RSS Request Trigger Source Select
The Request Trigger Source Select field determines the peripheral that can initiate a DMA
transfer . The corresponding interrupts do not need to be enabled within the Interrupt Controller
to initiate a DMA transfer. However, if the Request T rigger Source can enable or disable the
interrupt request sent to the Interrupt Controller, the interrupt request must be enabled within
the Request Trigger Source block.
000 = Timer 0.
001 = Timer 1.
010 = Timer 2.
011 = Timer 3.
100 = DMA0 Control Register: UART0 Received Data Register contains valid data. DMA1
Control Register: UART0 Transmit Data Register empty.
101 = DMA0 Control Register: UART1 Received Data Register contains valid data. DMA1
Control Register: UART1 Transmit Data Register empty.
110 = DMA0 Control Register: I2C Receiver Interrupt. DMA1 Control Register: I2C Transmitter
Interrupt Register empty.
111 = Reser ved .
Table 79. DMAx I/O Address Register (DMA xIO)
Bit 76543210
Field DMA_IO
RESET X
R/W R/W
Address FB1H, FB9H
Bit Description
[7:0]
DMA_IO DMA On-Chip Peripheral Control Register Address
This byte sets the low byte of the on-chip peripheral control register address on Register File
Page FH (addresses F00H to FFFH).
Bit Description (Continued)
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DMAx Address High Nibble Register
The DMAx Address High Register, shown in Ta ble 80, specifies the upper four bits of
address for the Start/Current and End addresses of DMAx.
Table 80. DMAx Address High Nibble Register (DMAxH)
Bit 76543210
Field DMA_END_H DMA_START_H
RESET X
R/W R/W
Address FB2H, FBAH
Bit Description
[7:4]
DMA_END_H DMAx End Address High Nibble
These bits , used with th e DMAx End Address Low Reg ister, form a 12-bit End Address.
The full 12-bit address is provided by {DMA_END_H[3:0], DMA_END[7:0]}.
[3:0]
DMA_START_H DMAx Start/Current Address High Nibble
These bit s, used with the DMAx Start/Current Address Low Re gister, form a 12-bit Start/
Current Address. The full 12-bit address is provided by {DMA_START_H[3:0],
DMA_START[7:0]}.
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DMAx Start/Current Address Low Byte Register
The DMAx Start/Current Address Low Byte Register, shown in Table 81, in conjunction
with the DMAx Address High Nibble Register, shown in Table 80, forms a 12-bit Start/
Current Address. Writes to this register set the Start Address for DMA operations. Each
time the DMA completes a data transfer, the 12-bit Start/Current Address increments by
either 1 (single-byte transfer) or 2 (two-byte word transfer). Reads from this register return
the low byte of the current address to be used for the next DMA data transfer.
DMAx End Address Low Byte Register
The DMAx End Address Low Byte Register, show n in Table 82, forms a 12-bit End
Address.
Table 81. DMAx Start/Current Address Low Byte Register (DMAxSTART)
Bit 76543210
Field DMA_START
RESET X
R/W R/W
Address FB3H, FBBH
Bit Description
[7:0]
DMA_START DMAx Start/Current Address Low
These bits , with th e four lower bits of the DMAx_H Register, form the 12-bit Start/Current
address. The full 12-bit address is provided by {DMA_START_H[3:0], DMA_START[7:0] }.
Table 82 . D MA x End Address Low Byte Register ( DM AxEND)
Bit 76543210
Field DMA_END
RESET X
R/W R/W
Address FB4H, FBCH
Bit Description
[7]
DMA_END DMAx End Address Low
These bits, with the four upper bits of th e DMAx_H Register, for m a 12- bit add re ss. This
address is the ending location of the DMAx transfer. The full 12-bit ad d re ss is pro vid ed by
{DMA_END_H[3:0], DMA_END[7:0]}.
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DMA_ADC Address Register
The DMA_ADC Address Register, shown in Table 84, points to a block of the Register
File to store the ADC conversion values displayed in Table 83. This register contains the
seven most significant bits of the 12-bit Register File addresses. The five least significant
bits are calculated from the ADC analog input number (5-bit base address is equal to twice
the ADC analog input number). The 10-bit ADC conversion data is stored as two bytes
with the most significant byte of the ADC data stored at the even-numbered Register File
address.
Table 83 provides an example of the Register File addresses if the DMA_ADC Address
Register contains the value 72H.
Table 83. DMA_ADC Register File Address Example
ADC Analog Input Register File Address
(Hex)*
0 720H–721H
1 722H–723H
2 724H–725H
3 726H–727H
4 728H–729H
5 72AH–72BH
6 72CH–72DH
7 72EH–72FH
8 730H–731H
9 732H–733H
10 734H–735H
11 736H–737H
Note: *DMAA_ADDR is set to 72H.
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DMA_ADC Control Register
The DMA_ADC Control Register, shown in Table 85, enables and sets options (DMA
enable and interrupt enable) for ADC operation.
Table 84. DMA_ADC Address Register (DMAA_ADDR)
Bit 76543210
Field DMAA_ADDR Reserved
RESET X
R/W R/W
Address FBDH
Bit Description
[7:1]
DMAA_ADDR DMA_ADC Address
These bits specify the seven most significant bits of the 12-bit Register File addresses
used for storing the ADC output data. The ADC analog input Number defines the five
least significant bits of the Register File address. Full 12-bit address is
{DMAA_ADDR[7:1], 4-bit ADC analog input Number, 0}.
0Reserved
This bit is reserved and must be programmed to 0.
Table 85. DMA_ADC Control Register (DMAACTL)
Bit 76543210
Field DAEN IRQEN Reserved ADC_IN
RESET 0
R/W R/W
Address FBEH
Bit Description
[7]
DAEN DMA_ADC Enable
0 = DMA_ADC is disabled and the ADC analog input Number (ADC_IN) is reset to 0.
1 = DMA_ADC is enabled.
[6]
IRQEN Interrupt Enable
0 = DMA_ADC does not gen erat e an y inte rr up ts.
1 = DMA_ADC generates an interrupt after transferring dat a from the last ADC analog input
specified by the ADC_IN field.
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DMA_ADC Status Register
The DMA Status Register, shown in Table 86, indicates the DMA channel that generated
the interrupt and the ADC analog input that is currently undergoing conversion. Reads
from this register reset the Interrupt Request Indicator bits (IRQA, IRQ1, and IRQ0) to 0.
Therefore, software interrupt service routines that read this register must process all three
interrupt sources from the DMA.
[5:4] Reserved
These bits are reserved and must be programmed to 00.
[3:0]
ADC_IN ADC Analog Input Number
These bits set the number of ADC analog inputs to be used in the continuous update (data
conversion followed by DMA data transfer). The conversion always begins with ADC analog
input 0 and then progresses sequentially through the other selected ADC analog inputs.
0000 = ADC analog input 0 updated.
0001 = ADC analog inputs 0–1 updated.
0010 = ADC analog inputs 0–2 updated.
0011 = ADC analog inputs 0–3 updated.
0100 = ADC analog inputs 0–4 updated.
0101 = ADC analog inputs 0–5 updated.
0110 = ADC analog inputs 0–6 updated.
0111 = ADC analog inputs 0–7 updated.
1000 = ADC analog inputs 0–8 updated.
1001 = ADC analog inputs 0–9 updated.
1010 = ADC analog inputs 0–10 updated.
1011 = ADC analog inputs 0–11 updated.
1100–1111 = Reserved.
Table 86. DMA_ADC Status Register (DMAA_STAT)
Bit 76543210
Field CADC[3:0] Reserved IRQA IRQ1 IRQ0
RESET 0
R/W R
Address FBFH
Bit Description
[7:4]
CADC[3:0] Current ADC Analog Input
This field identifies the Analog Input that the ADC is currently converting.
[3] Reserved
This bit is reserved and must be programmed to 0.
Bit Description (Continued)
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[2]
IRQA DMA_ADC Interrupt Request Indicator
This bit is automatically reset to 0 each time a read from this register occurs.
0 = DMA_ADC is not the source of the interrupt from the DMA Controller.
1 = DMA_ADC completed transfer o f dat a from the last ADC analog input and gene rated an
interrupt.
[1]
IRQ1 DMA1 Interrupt Request Indicator
This bit is automatically reset to 0 each time a read from this register occurs.
0 = DMA1 is not the source of the interrupt from the DMA Controller.
1 = DMA1 completed transfer of data to/from the End Address and generated an interrupt.
[0]
IRQ0 DMA0 Interrupt Request Indicator
This bit is automatically reset to 0 each time a read from this register occurs.
0 = DMA0 is not the source of the interrupt from the DMA Controller.
1 = DMA0 completed transfer of data to/from the End Address and generated an interrupt.
Bit Description (Continued)
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Analog-to-Digital Converter
The Analog-to-Digital Converter (ADC) conv erts an analog input signal to a 10-bit binary
number. The features of the sigma-delta ADC include:
•
12 analog input sources are multiplexed with general-purpose I/O ports
•
Interrupt upon comp letion of conv ersion
•
Internal voltage reference generator
•
A Direct Memory Access (DMA) controller that can automatically initiate data conver-
sion and transfer the data from 1 to 12 analog inputs
Architecture
Figure 34 displays the three major functional blocks (converter, analog multiplexer, and
voltage reference generator) of the ADC. The ADC converts an analog input signal to its
digital representation. The 12-input analog multiplexer selects one of the 12 analog input
sources. The ADC requires an input reference voltage for the conversion. The voltage ref-
erence for the conversion may be input through the external VREF pin or generated inter-
nally by the voltage reference generator.
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The sigma-delta ADC architecture provides alias and image attenuation below the ampli-
tude resolution of the ADC in the frequency range of DC to one-half the ADC clock rate
(one-fourth the system clock rate). The ADC provides alias free conversion for frequen-
cies up to one-half the ADC clock rate. Therefore, the sigma-delta ADC exhibits high
noise immunity, which makes it ideal for embedded applications. In addition, monotonic-
ity (no missing codes) is guaranteed by design.
Figure 34. Analog-to-Digital Converter Block Diagram
Analog-to-Digital
Converter
ANA0
ANA1
ANA2
ANA3
ANA4
ANA5
ANA6
ANA7
ANA8
ANA9
ANA10
ANA11
Analog Input
Multiplexer
ANAIN[3:0]
Internal Voltage
Reference Ge nerator
VREF
Analog Input
Reference Input
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Operation
This section describes the operational aspects of the ADC’s power-down and conversion
features.
Automatic Power-Down
If the ADC is idle (i.e., no conversions are in progress) for 160 consecutive system clock
cycles, portions of the ADC are automatically powered down. From this powered-down
state, the ADC requires 40 system clock cycles to power up. The ADC powers up when a
conversion is requested using the ADC Control Register.
Single-Shot Conversion
When configured for single-shot conversion, the ADC performs a single analog-to-digital
conversion on the selected analog input channel. After completion of the conversion, the
ADC shuts down. Observe the following procedure for setting up the ADC and initiating a
single-shot conversion:
1. Enable the appropriate analog inputs by configuring the general-purpose I/O pins for
alternate function. This configuration disables the digital input and output drivers.
2. Write to the ADC Control Register to configure the ADC and begi n the conversion.
The bit fields in the ADC Control Register can be written simultaneously:
–Write to the ANAIN[3:0] field to select one of the 12 analog input sources
–Clear CONT to 0 to select a single-shot conversion
–Write to the VREF bit to enable or disable the internal voltage reference generator
–Set CEN to 1 to start the conversion
3. CEN remains 1 while the conversion is in progress. A single-shot conversion requires
5129 system clock cycles to complete. If a single-shot conversion is requested from an
ADC powered-down state, the ADC uses 40 additional clock cycles to power up
before beginning the 5129 cycle conversion.
4. When the conversion is complete, the ADC control logic performs the following oper -
ations:
–10-bit data result written to {ADCD_H[7:0], ADCD_L[7:6]}
–CEN resets to 0 to indicate the conversion is complete
–An interrupt request is sent to the Interrupt Controller
5. If the ADC remains idle for 160 consecutive system clock cycles, it is automatically
powered down.
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Continuous Conversion
When configured for continuous conversion, the ADC continuously performs an analog-
to-digital conversion on the selected analog input. Each new data value over-writes the
previous value stored in the ADC Data registers. An interrupt is generated after each con-
version.
In CONTINUOUS Mode, you must be aware that ADC updates are limited by the input
signal bandwidth of the ADC and the latency of the ADC and its digital filter . Step chang-
es at the input are not seen at the next output from the ADC. The response of the ADC
(in all modes) is limited by the input signal bandwidth and the latency.
Observe the following procedure for setting up the ADC and initiating continuous conver-
sion:
1. Enable the appropriate analog input by configuring the general-purpose I/O pins for
alternate function. This disables the digital input and output driver.
2. Write to the ADC Control Register to configure the ADC for continuous conversion.
The bit fields in the ADC Control Register ma y be written simultaneously:
–Write to the ANAIN[3:0] field to select one of the 12 analog input sources
–Set CONT to 1 to select continuous conversion
–Write to the VREF bit to enable or disable the internal voltage reference generator
–Set CEN to 1 to start the conversions
3. When the first conversion in continuous operation is complete (after 5129 system
clock cycles, plus the 40 cycles required to power up, if necessary), the ADC control
logic performs the following operations:
–CEN resets to 0 to indicate the first conversion is complete. CEN remains 0 for all
subsequent conversions in continuous operation
–An interrupt request is sent to the Interrupt Controller to indicate the conv ersion is
complete
4. Thereafter, the ADC writes a new 10-bit data result to {ADCD_H[7:0],
ADCD_L[7:6]} every 256 system clock cycles. An interrupt request is sent to the
Interrupt Controller when each conversion is complete.
5. To disable continuous conversion, clear the CONT bit in the ADC Control Register to
0.
Caution:
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DMA Control of the ADC
The Direct Memory Access (DMA) Controller can control operation of the ADC includ-
ing analog input selection and conversion enable. For more information about the DMA
and configuring for ADC operations, see the Direct Memory Access Controller chapter on
page 150.
ADC Control Register Definitions
This section defines the features of the following ADC Control registers.
ADC Control Register: see page 165
ADC Data High Byte Register: see page 167
ADC Data Low Bits Register: see page 168
ADC Control Register
The ADC Control Register selects the analog input channel and initiates the analog-to-dig-
ital conversion.
Table 87. ADC Control Register (ADCCTL)
Bit 76543210
Field CEN Reserved VREF CONT ANAIN[3:0]
RESET 01 0
R/W R/W
Address F70H
Bit Description
[7]
CEN Conversion Enable
0 = Conversion is complete. Writing a 0 produces no effect. The ADC automatically clears
this bit to 0 when a conversion has been completed.
1 = Begin conversion. Writing a 1 to this bit st arts a conversion. If a conversio n is a lre ady in
progress, the conversion restarts. This bit remains 1 until the conversion is complete.
[6] Reserved
This bit is reserved and must be programmed to 0.
[5]
VREF Voltage Reference
0 = Internal voltage refere nc e ge ne ra to r enable d . Th e VREF pin should be left unconnected
(or capaciti vely coupled to analog ground) if th e internal voltage re ference is selected as
the ADC reference voltage.
1 = Internal voltage refere nc e ge ne ra to r disab le d. An exte rn al vo ltage refere nce must be
provided through the VREF pin.
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[4]
CONT Conversion
0 = Single-shot conversion. ADC dat a is output once at co mpletion of the 5129 syste m clock
cycles.
1 = Continuous conversion. ADC data updated every 256 system clock cycles.
[3:0]
ANAIN[3:0] Analog Input Select
These bits select the analog input for co nversion. For information about the Port pins avail-
able with each package style, see the Signal and Pin Descriptions chapter on page 7. Do
not enable unavailable analog inputs.
0000 = ANA0.
0001 = ANA1.
0010 = ANA2.
0011 = ANA3.
0100 = ANA4.
0101 = ANA5.
0110 = ANA6.
0111 = ANA7.
1000 = ANA8.
1001 = ANA9.
1010 = ANA10.
1011 = ANA11.
11xx = Reserved.
Bit Description (Continued)
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ADC Data High Byte Register
The ADC Data High Byte Register , shown in Table 88, contains the upper eight bits of the
10-bit ADC output. During a single-shot conversion, this value is invalid. Access to the
ADC Data High Byte Register is read-only. The full 10-bit ADC result is provided by
{ADCD_H[7:0], ADCD_L[7:6]}. Reading the ADC Data High Byte Register latches data
in the ADC Low Bits Register.
Table 88. ADC Data High Byte Register (ADCD_H)
Bit 76543210
Field ADCD_H
RESET X
R/W R
Address F72H
Bit Description
[7:0]
ADCD_H ADC Data High Byte
This byte contains the up per eight bit s of the 10-bit ADC output. The se bits ar e not valid during
a single-shot conversion. During a continu ous conversion, the last co nversi on output is held in
this register. These bits are undefined after a Reset.
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ADC Data Low Bits Register
The ADC Data Low Bits Register, Table 89, contains the lower two bits of the conversion
value. The data in the ADC Data Low Bits Register is latched each time the ADC Data
High Byte Register is read. Reading this register always returns the lower two bits of the
conversion last read into the ADC High Byte Register. Access to the ADC Data Low Bits
Register is read-only. The full 10-bit ADC result is provided by {ADCD_H[7:0],
ADCD_L[7:6]}.
Table 89. ADC Data Low Bits Register (ADCD_L)
Bit 76543210
Field ADCD_L Reserved
RESET X
R/W R
Address F73H
Bit Description
[7:6]
ADCD_L ADC Data Low Bits
These are the least significant two bits of the 10-bit ADC output. These bits are undefined after
a Reset.
[5:0] Reserved
These bits are reserved and are always undefined.
PS019924-0113 PR E L IMINARY Flash Memory
Z8 Encore! XP® F64xx Series
Product Specification
169
Flash Memory
The products in the Z8 Encore! XP F64xx Series feature up to 64 KB (65,536 bytes) of
non-volatile Flash memory with read/write/erase capability. The Flash memory can be
programmed and erased in-circuit by either user code or through the On-Chip Debugger.
The Flash memory array is arranged in 512 byte per page. The 512 byte page is the mini-
mum Flash block size that can be erased. The Flash memory is also divided into 8 sectors
which can be protected from programming and erase operations on a per sector basis.
Table 90 describes the Flash memory configuration for each de vice in the Z8 Encore! XP
F64xx Series. Table 91 lists the sector address ranges. Figure 35 displays the Flash mem-
ory arrangement.
Table 90. Flash Memory Configurations
Part
Number Flash Size Number of
Pages Flash Memory
Addresses Sector Size Number of
Sectors Pages per
Sector
Z8F162x 16K (16,384) 32 0000H–3FFFH 2K (2048) 8 4
Z8F242x 24K (24,576) 48 0000H–5FFFH 4K (4096) 6 8
Z8F322x 32K (32,768) 64 0000H–7FFFH 4K (4096) 8 8
Z8F482x 48K (49,152) 96 0000H–BFFFH 8K (8192) 6 16
Z8F642x 64K (65,536) 128 0000H–FFFFH 8K (8192) 8 16
Table 91. Flash Memory Sector Addresses
Sector
Number
Flash Sector Address Ranges
Z8F162x Z8F242x Z8F322x Z8F482x Z8F642x
0 0000H–07FFH 0000H–0FFFH 0000H–0FFFH 0000H–1FFFH 0000H–1FFFH
1 0800H–0FFFH 1000H–1FFFH 1000H–1FFFH 2000H–3FFFH 2000H–3FFFH
2 1000H–17FFH 2000H–2FFFH 2000H–2FFFH 4000H–5FFFH 4000H–5FFFH
3 1800H–1FFFH 3000H–3FFFH 3000H–3FFFH 6000H–7FFFH 6000H–7FFFH
4 2000H–27FFH 4000H–4FFFH 4000H–4FFFH 8000H–9FFFH 8000H–9FFFH
5 2800H–2FFFH 5000H–5FFFH 5000H–5FFFH A000H–BFFFH A000H–BFFFH
6 3000H–37FFH N/A 6000H–6FFFH N/A C000H–DFFFH
7 3800H–3FFFH N/A 7000H–7FFFH N/A E000H–FFFFH
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170
Information Area
Table 92 describes the Z8 Encore! XP F64xx Series Information Area. This 512-byte
Information Area is accessed by setting bit 7 of the Page Select Register to 1. When access
is enabled, the Information Area is mapped into Flash memory and overlays the 512 bytes
at addresses FE00H to FFFFH. When the Information Area access is enabled, LDC instruc-
tions return data from the Information Area. CPU instruction fetches always comes from
Flash memory regardless of the Information Area access bit. Access to the Information
Area is read-only.
Figure 35. Flash Memory Arrangement
64KB Flash
Program Memory
0000H
128 Pages
512 Bytes per Page
01FFH
0200H
03FFH
FC00H
FDFFH
FE00H
FFFFH
0400H
05FFH
FA00H
FBFFH
Addresses
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Operation
The Flash Controller provides the proper signals and timing for the Byte Programming,
Page Erase, and Mass Erase operations within Flash memory. The Flash Controller con-
tains a protection mechanism, via the Flash Control Regist er (FCTL), to prevent acciden-
tal programming or erasure. The following subsections provide details about the Lock,
Unlock, Sector Protect, Byte Programming, Page Erase and Mass Erase operations.
Timing Using the Flash Frequency Registers
Before performing a program or erase operation in Flash memory, you must first configure
the Flash Frequency High and Low Byte registers. The Flash Frequency registers allow
programming and erasure of the Flash with system clock frequencies ranging from 20 kHz
through 20 MHz (the valid range is limited to the device operating frequencies).
The Flash Frequency High and Low Byte registers combine to form a 16-bit value,
FFREQ, to control timing for Flash program and erase operations. The 16-bit Flash Fre-
quency value must contain the system clock frequency in kHz. This value is calculated
using the following equation:.
Flash programming and erasure are not supported for system clock frequenc ies below
20 kHz, above 20 MHz, or outside of the devices’ operating frequency range. The Flash
Frequency High and Low Byte registers must be loaded with the correct value to ensure
proper Flash prog ramming and erase operations.
Table 92. Z8 Encore! XP F64xx Series Information Area Map
Flash Memory
Address (Hex) Function
FE00H–FE3FH Reserved
FE40H–FE53H Part Number
20-character ASCII alphanumeric code
Left-justified and filled with zeros
FE54H–FFFFH Reserved
FFREQ[15:0] System Clock Frequency (Hz)
1000
------------------------------------------------------------------------
=
Caution:
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Flash Read Protection
The user code contained within Flash memory can be protected from external access. Pro-
gramming the Flash Read Protect option bit prevents reading of user code by the On-Ch ip
Debugger or by using the Flash Controller Bypass mode . For more information, see the
Option Bits chapter on page 180 and the On-Chip Debugger chapter on page 183.
Flash Write/Erase Protection
The Z8 Encore! XP F64xx Series provides several levels of protection against accidental
program and erasure of the Flash memory contents. This protection is provided by the
Flash Controller unlock mechanism, the Flash Sector Protect Register , and the Flash W rite
Protect option bit.
Flash Controller Unlock Mechanism
At Reset, the Flash Controller locks to prevent accident al prog ram or erasure of Flash
memory. To program or erase Flash memory, the Flash Controller must be unlocked. After
unlocking the Flash Controller , the Flash can be programmed or erased. Any value written
by user code to the Flash Control Register or Page Select Register out of sequence will
lock the Flash Controller.
Observe the following procedure to unlock the Flash Controller from user code:
1. Write 00H to the Flash Control Register to reset the Flash Controller.
2. Write the page to be programmed or erased to the Page Select Register.
3. Write the first unlock command 73H to the Flash Control Register.
4. Write the second unlock command 8CH to the Flash Control Register.
5. Rewrite the page written in Step 2 to the Page Select Register.
Flash Sector Protection
The Flash Sector Protect Register can be configured to prevent sectors from being pro-
grammed or erased. After a sector is protected, it cannot be unprotected by user code. The
Flash Sector Protect Register is cleared after reset and any previously written protection
values is lost. User code must write this register in their initialization routine if they want
to enable sector protection.
The Flash Sector Protect Register shares its Register File address with the Page Select
Register. The Flash Sector Protect Register is accessed by writing the Flash Control Regis-
ter with 5EH. After the Flash Sector Protect Register is selected, it can be accessed at the
Page Select Register address. When user code writes the Flash Sector Protect Register,
bits can only be set to 1. Thus, sectors can be protected, but not unprotected, via register
write operations. Writing a value other than 5EH to the Flash Control Register deselects
the Flash Sector Protect Register and reenables access to the Page Select Register.
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Observe the following procedure to setup the Flash Sector Protect Register from us er
code:
1. Write 00H to the Flash Control Register to reset the Flash Controller.
2. Write 5EH to the Flash Control Register to select the Flash Sector Protect Register.
3. Read and/or write the Flash Sector Protect Register which is now at Register File
address FF9H.
4. Write 00H to the Flash Control Register to return the Flash Controller to its reset state.
Flash Write Protection Option Bit
The Flash Write Protect option bit can be enabled to block all program and erase opera-
tions from user code. For more information, see the Option Bits chapter on page 180.
Byte Programming
When the Flash Controller is unlocked, writes to Flash memory from user code will pro-
gram a byte into the Flash if the address is located in the unlocked page. An erased Flash
byte contains all ones (FFH). The programming operation can only be used to change bits
from one to zero. To change a Flash bit (or multiple bits) from zero to one requires a Page
Erase or Mass Erase operation.
Byte programming can be accomplished using the eZ8 CPU’s LDC or LDCI instructions.
For a description of the LDC and LDCI instructions, refer to the eZ8 CPU Core User Man-
ual (UM0128), which is available for download on www.zilog.com.
While the Flash Controller programs Flash memory, the eZ8 CPU idles but the system
clock and on-chip peripherals continue to operate. Interrupts that occur when a program-
ming operation is in progress are serviced after the programming operation is complete. T o
exit programming mode and lock the Flash Controller, write 00H to the Flash Control
Register.
User code cannot program Flash memory on a page that resides in a protected sector.
When user code writes memory locations, only addresses located in the unlocked page are
programmed. Memory writes outside of the unlocked page are ignored.
Each memory location must not be programmed more than twice before an erase occurs.
Observe the following procedure to program the Flash from user code:
1. Write 00H to the Flash Control Register to reset the Flash Controller.
2. Write the page of memory to be programmed to the Page Select Register.
3. Write the first unlock command 73H to the Flash Control Register.
Caution:
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4. Write the second unlock command 8CH to the Flash Control Register.
5. Rewrite the page written in Step 2 to the Page Select Register.
6. Write Flash memory using LDC or LDCI instructions to program the Flash.
7. Repeat Step 6 to program additional memory locations on the same page.
8. Write 00H to the Flash Control Register to lock the Flash Controller.
Page Erase
Flash memory can be erased one page (512 bytes) at a time. Page-erasing Flash memory
sets all bytes in a page to the value FFH. The Page Select Register identifies the page to be
erased. While the Flash Controller executes the Page Erase opera tion, the eZ8 CPU idles;
however, the system clock and on-chip peripherals continue to operate. The eZ8 CPU
resumes operation after the Page Erase operation completes. Interrupts that occur when
the Page Erase operation is in progress are serviced after the Page Erase operation is com-
plete. When the Page Erase operation is complete, the Flash Controller returns to its
locked state. Only pages located in unprotected sectors can be erased.
Observe the following procedure to perform a Page Erase operation:
1. Write 00H to the Flash Control Register to reset the Flash Controller.
2. Write the page to be erased to the Page Select Register.
3. Write the first unlock command 73H to the Flash Control Register.
4. Write the second unlock command 8CH to the Flash Control Register.
5. Rewrite the page written in Step 2 to the Page Select Register.
6. Write the Page Erase command 95H to the Flash Control Register.
Mass Erase
The Flash memory cannot be mass-erased by user code.
Flash Controller Bypass
The Flash Controller can be bypassed and the control signals for Flash memory can be
brought out to the GPIO pins. Bypassing the Flash Controller allows faster programming
algorithms by controlling the Flash programming signals directly.
Flash Controller Bypass is recommended for gang programming applications and large
volume customers who do not require in-circuit programming of Flash memory.
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Product Specification
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For more information about bypassing the Flash Controller, refer to the Third Party Flash
Programming Support for Z8 Encore! MCUs Application Note (AN0117), which is avail-
able for download at www.zilog.com.
Flash Controller Behavior in Debug Mode
The following changes in Flash Controller behavior occur when the Flash Controller is
accessed using the On-Chip Debugger:
•
The Flash Write Protect option bit is ignored
•
The Flash Sector Protect Register is ignored for programming and erase operations
•
Programming operations are not limited to the page selected in the Page Select Register
•
Bits in the Flash Sector Protect Register can be written to one or zero
•
The second write of the Page Select Register to unlock the Flash Controller is not nec-
essary
•
The Page Select Register can be written when the Flash Controller is unlocked
•
The Mass Erase command is enabled through the Flash Control Register
For security reasons, the Flash Controller allows only a single page to be opened for
write/erase operations. When writing multiple Flash pages, the Flash Controller must go
through the unlock sequence again to select another page.
Flash Control Register Definitions
This section defines the features of the following Flash Control registers.
Flash Control Register: see page 175
Flash Status Register: see page 177
Page Select Register: see page 177
Flash Sector Protect Register: see page 178
Flash Frequency High and Low Byte Registers: see page 179
Flash Control Register
The Flash Control Register, shown in Table 93, unlocks the Flash Controller for program-
ming and erase operations, or to select the Flash Sector Protect Register.
Caution:
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The write-only Flash Control Register shares its Register File address with the read-only
Flash Status Register.
Table 93. Flash Control Register (FCTL)
Bit 76543210
Field FCMD
RESET 0
R/W W
Address FF8H
Bit Description
[7:0]
FCMD Flash Command*
73H = First unlock command.
8CH = Second unlock command.
95H = Page erase command.
63H = Mass erase command
5EH = Flash Sector Protect Register select.
Note: *All other commands, or any command out of sequence, lock the Flash Controller.
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Flash Status Register
The Flash Status Register, shown in Table 94, indicates the current state of the Flash Con-
troller. This register can be read at any time. The read-only Flash Status Register shares its
Register File address with the write-only Flash Control Register.
Page Select Register
The Page Select (FPS) Register, shown in Table 95, selects one of the 128 available Flash
memory pages to be erased or program med. Each Flash page contains 512 bytes of Flash
memory. During a Page Erase operation, all Flash memory locations with the 7 most sig-
nificant bits of the address provided by the PAGE field are erased to FFH.
The Page Select Register shares its Register File address with the Flash Sector Protect
Register. The Page Select Register cannot be accessed when the Flash Sector Protect Reg-
ister is enabled.
Table 94. Flash Status Register (FSTAT)
Bit 76543210
Field Reserved FSTAT
RESET 0
R/W R
Address FF8H
Bit Description
[7:6] Reserved
These bits are reserved and must be programmed to 00.
[5:0]
FSTAT Flash Controller Status
00_0000 = Flash Controller locked.
00_0001 = First unlock command received.
00_0010 = Second unlock command received.
00_0011 = Flash Controller unlocked.
00_0100 = Flash Sector Protect Register selected.
00_1xxx = Program operation in progress.
01_0xxx = Page erase operation in progress.
10_0xxx = Mass erase operation in progress.
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Product Specification
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Flash Sector Protect Register
The Flash Se ctor Protect Registe r , show n in Table 96, protects Flash memory sectors from
being programmed or erased from user code. The Flash Sector Protect Register shares its
Register File address with the Page Select Register. The Flash Sector Protect Register can
be accessed only after writing the Flash Control Register with 5EH.
User code can only write bits in this register to 1 (bits cannot be cleared to 0 by user code).
To determine the appropriate Flash memory sector address range and sector number for
your Z8F64xx Series product, please refer to Table 91 on page 169.
Table 95. Page Select Register (FPS)
Bit 76543210
Field INFO_EN PAGE
RESET 0
R/W R/W
Address FF9H
Bit Description
[7]
INFO_EN Information Area Enable
0 = Information Area is not selected.
1 = Information Area is selected. The Information area is mapped into the Flash memory
address space at addresses FE00H through FFFFH.
[6:0]
PAGE Page Select
This 7-bit field select s the Flash memory page for pro gramming and Page Erase opera tions.
Flash Memory Address[15:9] = PAGE[6:0].
Table 96. Flash Sector Protect Register (FPROT)
Bit 76543210
Field SECT7 SECT6 SECT5 SECT4 SECT3 SECT2 SECT1 SECT0
RESET 0
R/W R/W*
Address FF9H
Note: *R/W = This register is accessible for read operations; it can be written to 1 only via user code.
Bit Description
[7:0]
SECTnSector Protect**
0 = Sector n can be programmed or erased from user code.
1 = Sector n is protected and cannot be programmed or erased from user code.
Note: **User code can only write bits from 0 to 1.
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Product Specification
179
Flash Frequency High and Low Byte Registers
The Flash Frequency High and Low Byte registers, shown in Tables 97 and 98, combine
to form a 16-bit value, FFREQ, to control timing for Flash program and erase operations.
The 16-bit Flash Frequency registers must be written with the system clock frequency in
kHz for Program and Erase operations. Calculate the Flash Frequency value using the fol-
lowing equation:
Flash programming and erasure is not supported for system clock frequencies below
20 kHz, above 20 MHz, or outside of the valid operating frequency range for the device.
The Flash Frequency High and Low Byte registers must be loaded with the correct value
to ensure proper program and erase times.
Table 97. Flash Frequency High Byte Register (FFREQH)
Bit 76543210
Field FFREQH
RESET 0
R/W R/W
Address FFAH
Table 98. Flash Frequency Low Byte Register (FFREQL)
Bit 76543210
Field FFREQL
RESET 0
R/W R/W
Address FFBH
Bit Description
[7:0]
FFREQH,
FFREQL
Flash Frequency High and Low Bytes
These 2 bytes, {FFREQH[7:0], FFREQL[7:0]}, contain the 16-bit Flash Frequency value.
FFREQ[15:0] FFREQH[7:0],FFREQL[7:0]
System Clock Frequency
1000
------------------------------------------------------------
==
Caution:
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Product Specification
180
Option Bits
Option bits allow user configuration of certain aspects of the Z8 Encore! XP F64xx Series
operation. The feature configuration data is stored in the Flash memory and read during
Reset. The features available for control via the option bits are:
•
Watchdog Timer time-out response selection–interrupt or Reset
•
Watchdog Timer enabled at Reset
•
The ability to prevent unwanted read access to user code in Flash memory
•
The ability to prevent accidental programming and erasure of the user code in Flash
memory
•
Voltage Brown-Out conf iguration is always enabled or disabled during STOP Mode to
reduce STOP Mode power consumption
•
Oscillator mode selection for high-, medium-, and low-power crystal oscillators or an
external RC oscillator
Operation
This section describes the type and configuration of the programmable Flash option bits.
Option Bit Configuration By Reset
Each time the option bits are programmed or erased, the device must be Reset for the
change to take place. During any reset operation (System Reset, Reset, or Stop Mode
Recovery), the option bits are automatically read from the Flash memory and written to
Option Configuration registers. The Option Configuration registers control operation of
the devices within the Z8 Encore! XP F64xx Series. Option bit control is established
before the device exits Reset and the eZ8 CPU begins code execution. The Option Config-
uration registers are not part of the Register File and are not accessible for read or write
access.
Option Bit Address Space
The first two bytes of Flash memory at addresses 0000H (see Table 99) and 0001H (see
Table 100) are reserved for the user option bits. The byte at Flas h memo ry add ress 0000H
configures user options. The byte at Flash memory address 0001H is reserved for future
use and must remain unprogrammed.
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Flash Memory Address 0000H
Table 99. Flash Option Bits At Flash Memory Address 0000H
Bit 7 6 5 4 3 2 1 0
Field WDT_RES WDT_AO OSC_SEL[1:0] VBO_AO RP Reserved FWP
RESET U
R/W R/W
Address Program Memory 0000H
Note: U = Unchanged by Reset; R/W = Read/Write.
Bit Description
[7]
WDT_RES Watchdog Timer Reset
0 = Watchdog Timer time-out generates an interrupt request. Interrupts must be globally
enabled for the eZ8 CPU to acknowledge the interrupt request.
1 = Watchdog Timer time-out causes a Short Reset. This setting is the default for unpro-
grammed (erased) Flash.
[6]
WDT_AO Watchdog Timer Always On
0 = Watchdog Timer is automatically enabled upon application of system power. Watch-
dog Timer can not be disabled except during STOP Mode (if configured to power
down during STOP Mode).
1 = Watchdog Timer is enabled upon execution of the WDT instruction. Once enabled,
the Watchdog Timer can only be disabled by a Reset or Stop Mode Recovery. This
setting is the default for unprogrammed (erased) Flash.
[5:4]
OSC_SEL[1:0] Oscillator Mode Selection
00 = On-chip oscillator configured for use with external RC networks (< 4 MHz).
01 = Minimum power for use with very low frequency crystals (32 kHz to 1.0 MHz).
10 = Medium power for use with medium frequency crystals or ceramic resonators
(0.5 MHz to 10.0 MHz).
11 = Maximum power for use with high frequency crystals (8.0 MHz to 20.0 MHz). This
setting is the default for unprogrammed (erased) Flash.
[3]
VBO_AO Voltage Brown-Out Protection Always On
0 = Voltage Brown-Out Protection is disabled in STOP Mode to reduce total power con-
sumption.
1 = Voltage Brown-Out Protection is always enabled including during STOP Mode. This
setting is the default for unprogrammed (erased) Flash.
[2]
RP Read Protect
0 = User program code is ina ccessible. Limited contr ol features are ava ilable through the
On-Chip Debu gg e r.
1 = User program code is accessible. All On-Chip Debugger commands are enabled.
This setting is the default for unprogrammed (erased) Flash.
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Flash Memory Address 0001H
[1] Reserved
This bit is reserved and must be programmed to 0.
[0]
FWP Flash Write Protect (Flash version only)
0 = Programming, Page Erase, and Mass Erase through User Code is disabled. Mass
Erase is available through the On-Chip Debugger.
1 = Programming, and Page Erase are enabled for all of Flash program memory.
Table 100. Options Bits at Flash Memory Address 0001H
Bit 76543210
Field Reserved
RESET U
R/W R/W
Address Program Memory 0001H
Note: U = Unchanged by Reset. R/W = Read/Write.
Bit Description
[7:0] Reserved
These option bits are reserved for future use and must always be 1. This setting is the default
for unprogrammed (erased) Flash.
Bit Description (Continued)
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183
On-Chip Debugger
The Z8 Encore! XP F64xx Series products contain an integrated On-Chip Debugger
(OCD) that provides advanced debugging features including:
•
Reading and writing of the Register File
•
Reading and writing of Program and Data memory
•
Setting of breakpoints
•
Execution of eZ8 CPU instructions
Architecture
The On-Chip Debugger consists of four primary functional blo cks: transmitter, receiver,
autobaud generator, and debug controller. Figure 36 displays the architecture of the On-
Chip Debugger.
Figure 36. On-Chip Debugger Block Diagram
Autobaud
Detector/Generator
Transmitter
Receiver
Debug Controller
System
Clock
DBG
Pin
eZ8
TM
CPU
Control
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Operation
The following section describes the operation of the OCD.
OCD Interface
The On-Chip Debugger us es the DBG pin for communication with an external host. This
one-pin interface is a bidirectional open-drain interface that transmits and receives data.
Data transmission is half-duplex, meaning that transmit and receive operations cannot
occur simultaneously. The serial data on the DBG pin is sent using the standard asynchro-
nous data format defined in RS-232. This pin can interface the Z8 Encore! XP F64xx
Series products to the serial port of a host PC using minimal external hardware.Two differ-
ent methods for connecting the DBG pin to an RS-232 interface are depicted in Figures 37
and 38.
For proper operation of the On-Ch ip Debugger , all power pins (VDD and AVDD) must be
supplied with power, and all ground pins (VSS and AVSS) must be properly grounded.
The DBG pin is open-drain and must always be connected to VDD through an external
pull-up resistor to ensure proper operation.
Figure 37. Interfacing the On-Chip Debugger’s DBG Pin with an RS-232 Interface, #1 of 2
Caution:
RS-232 TX
RS-232 RX
RS-232
Transceiver
V
DD
DBG Pin
10k
Ω
Diode
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185
DEBUG Mode
The operating characteristics of the Z8 Encore! XP F64xx Series devices in DEBUG
Mode are:
•
The eZ8 CPU fetch unit stops, idling the eZ8 CPU, unless directed by the OCD to ex-
ecute specific instructions
•
The system clock operates unless in STOP Mode
•
All enabled on-chip p eripherals operate unless in STOP Mode
•
Automatically exits HALT Mode
•
Constantly refreshes the Watchdog Timer, if enabled
Entering DEBUG Mode
The device enters DEBUG Mode following any of the following operations:
•
W riting the DBGMODE bit in the OCD Control Register to 1 using the OCD interface
•
eZ8 CPU execution of a breakpoint (BRK) instruction (when enabled)
•
If the DBG pin is Low when the device exits Reset, the On-Chip Debugger automati-
cally puts the device into DEBUG Mode
Exiting DEBUG Mode
The device exits DEBUG Mode following any of the following operations:
•
Clearing the DBGMODE bit in the OCD Control Register to 0
•
Power-On Reset
Figure 38. Interfacing the On-Chip Debugger’s DBG Pin with an RS-232 Interface, #2 of 2
RS-232 TX
RS-232 RX
RS-232
Transceiver
V
DD
DBG Pin
10k
Ω
Open-Drain
Buffer
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•
Voltage Brown-Out reset
•
Asserting the RESET pin Low to initiate a Reset
•
Driving the DBG pin Low while the device is in STOP Mode initiates a system reset
OCD Data Format
The OCD interface uses the asynchronous data format defined for RS-232. Each character
is transmitted as 1 start bit, 8 data bits (least significant bit first), and 1 stop bit, as shown
in Figure 39.
OCD Autobaud Detector/Generator
To run over a range of baud rates (bits per second) with various system clock frequencies,
the On-Chip Debugger has an Autobaud Detector/Generator. After a reset, the OCD is idle
until it receives data. The OCD requires that the first character sent from the host is the
character 80H. The character 80H has eight continuous bits Low (one start bit plus 7 data
bits). The Autobaud Detector measures this period and sets the OCD Baud Rate Generator
accordingly.
The Autobaud Detector/Generator is clocked by the system clock. The minimum baud rate
is the system clock frequency divided by 512. For optimal operation, the maximum rec-
ommended baud rate is the system clock frequency divided by 8. The theoretical maxi-
mum baud rate is the system clock frequency divided by 4. This theoretical maximum is
possible for low noise designs with clean signals. Table 101 lists minimum and recom-
mended maximum baud rates for sample crystal frequencies.
Figure 39. OCD Data Format
Table 101. OCD Baud-Rate Limits
System Clock
Frequency (MHz)
Recommended
Maximum Baud Rate
(kbits/s) Minimum Baud Rate
(kbits/s)
20.0 2500 39.1
1.0 125.0 1.96
0.032768 (32 kHz) 4.096 0.064
STARTD0D1D2D3D4D5D6D7STOP
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If the OCD receives a serial break (nine or more continuous bits Low) the Autobaud
Detector/Generator resets. The Autobaud Detector/Generator can then be reconfigured by
sending 80H.
OCD Serial Errors
The On-Chip Debugger can detect any of the following error conditions on the DBG pin:
•
Serial break (a minimum of nine continuous bits Low)
•
Framing error (received stop bit is Low)
•
Transmit collision (OCD and host simultaneous transmission detected by the OCD)
When the OCD detects one of these errors, it aborts any command currently in progress,
transmits a serial break 4096 system clock cycles long back to the host, and resets the
Autobaud Detector/Generator. A framing error or transmit collision may be caused by the
host sending a serial break to the OCD. Because of the open-drain nature of the interface,
returning a serial break back to the host only exte nds the length of the serial break if the
host releases the serial break early.
The host transmits a serial break on the DBG pin when first connecting to the Z8 Encore!
XP F64xx Series devices or when recovering from an error. A serial break from the host
resets the Autobaud Generator/Detector but does not reset the OCD Control Register. A
serial break leaves the device in DEBUG Mode if that is the current mode. The OCD is
held in Reset until the end of the serial break when the DBG pin returns High. Because of
the open-drain nature of the DBG pin, the host can send a serial break to the OCD even if
the OCD is transmitting a character.
Breakpoints
Execution breakpoints are generated using the BRK instruction (op code 00H). When the
eZ8 CPU decodes a BRK instruction, it signals the On-Chip Debugger. If breakpoints are
enabled, the OCD idles the eZ8 CPU and enters DEBUG Mode. If breakpoints are not
enabled, the OCD ignores the BRK signal and the BRK instruction operates as an NOP.
If breakpoints are enabled, the OCD can be configured to automatically enter DEBUG
Mode, or to loop on the break instruction. If the OCD is configured to loop on the BRK
instruction, then the CPU is still enabled to service DMA and interrupt requests.
The loop on BRK instruction can be used to service interrupts in the background. For
interrupts to be serviced in the background, there cannot be any breakpoints in the inter-
rupt service routine. Otherwise, the CPU stops on the breakpoint in the interrupt routine.
For interrupts to be serviced in the background, interrupts must also be enabled. Debug-
ging software should not automatically enable interrupts when using this feature, since
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interrupts are typically disabled during critical sections of code where interrupts should
not occur (such as adjusting the stack pointer or modifying shared data).
Software can poll the IDLE bit of the OCDSTAT Register to determine if the OCD is loop-
ing on a BRK instruction. When software stops the CPU on the BRK instruction that it is
looping on, it should not set the DBGMODE bit of the OCDCTL Register. The CPU may
have vectored to and be in the middle of an interrupt service routine when this bit gets set.
Instead, software must clear the BRKLP bit. This action allows the CPU to finish the inter -
rupt service routine it may be in and return the BRK instruction. When the CPU returns to
the BRK instruction it was previously looping on, it automatically sets the DBGMODE bit
and enters DEBUG Mode.
Software detects that the majority of the OCD commands are still disabled when the eZ8
CPU is looping on a BRK instruction . The eZ8 CPU must b e stopped an d the part must be
in DEBUG Mode before these commands can be issued.
Breakpoints in Flash Memory
The BRK instruction is op code 00H, which corresponds to the fully programmed state of
a byte in Flash memory. To implement a breakpoint, write 00H to the appropriate address,
overwriting the current instruction. To remove a breakpoint, the corresponding page of
Flash memory must be erased and reprogrammed with the original data.
On-Chip Debugger Commands
The host communicates to the On-Chip Debugger by sending OCD commands using the
DBG interface. During normal operation, only a subset of the OCD commands are a vail-
able. In DEBUG Mode, all OCD commands become available unless the user code and
control registers are protected by programming the Read Protect option bit (RP). The Read
Protect option bit prevents the code in memory from being read out of the Z8 Encore! XP
F64xx Series products. When this option is enabled, several of the OCD commands are
disabled.
Table 102 contains a summary of the On-Chip Debugger commands. Table 102 lists those
commands that operate when the device is not in DEBUG Mode (normal operation) and
those commands that are disabled by programming the Read Protect option bit.
Each OCD command is further described in the list that follows the table.
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In the following list of OCD commands, data and commands sent from the host to the On-
Chip Debugger are identified by DBG ← Command/Data. Data sent from the On-Chip
Debugger back to the host is identified by DBG → Data.
Read OCD Revision (00H). The Read OCD Revision command determines the version of
the On-Chip Debugger. If OCD comma nds are added, removed, or changed, this revision
number changes.
Table 102. On-Chip Debugger Commands
Debug Command Command
Byte
Enabled when
NOT in DEBUG
Mode? Disabled by Read Protect Option Bit
Read OCD Revision 00H Yes —
Read OCD Status
Register 02H Yes —
Read Runtime Counter 03H — —
Write OCD Control
Register 04H Yes Cannot clear DBGMODE bit
Read OCD Control
Register 05H Yes —
Write Program Counter 06H — Disabled
Read Program Counter 07H — Disabled
Write Register 08H — Only writes of the Flash memory control
registers are allowed. Additionally , only the
Mass Erase command is allowed to be
written to the Flash Control Register.
Read Register 09H — Disabled
Write Program Memory 0AH — Disabled
Read Program Memory 0BH — Disabled
Write Data Memory 0CH — Disabled
Read Data Memory 0DH — Disabled
Read Program Memory
CRC 0EH — —
Reserved 0FH — —
Step Instruction 10H — Disabled
Stuff Instruction 11H — Disabled
Execute Instruction 12H — Disabled
Reserved 13H–FFH — —
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DBG ← 00H
DBG OCDREV[15:8] (Major revision number)
DBG OCDREV[7:0] (Minor revision number)
Read OCD Status Register (02H). The Read OCD Status Register command reads the
OCDSTAT Register.
DBG ← 02H
DBG OCDSTAT[7:0]
Write OCD Control Register (04H). The Write OCD Control Register command writes
the data that follows to the OCDCTL Register. When the Read Protect option bit is
enabled, the DBGMODE bit (OCDCTL[7]) can only be set to 1, it cannot be cleared to 0
and the only method of putting the device back into normal operating mode is to reset the
device.
DBG ← 04H
DBG ← OCDCTL[7:0]
Read OCD Control Register (05H). The Read OCD Control Register command reads the
value of the OCDCTL Register.
DBG ← 05H
DBG OCDCTL[7:0]
Write Program Counter (06H). The Write Program Counter command writes the data
that follows to the eZ8 CPU’s Program Counter (PC). If the device is not in DEBUG
Mode or if the Read Protect option bit is enabled, the Program Counter (PC) values are
discarded.
DBG ← 06H
DBG ← ProgramCounter[15:8]
DBG ← ProgramCounter[7:0]
Read Program Counter (07H). The Read Program Counter command reads the value in
the eZ8 CPU’s Program Counter (PC). If the device is not in DEBUG Mode or if the Read
Protect option bit is enabled, this command returns FFFFH.
DBG ← 07H
DBG ProgramCounter[15:8]
DBG ProgramCounter[7:0]
Write Register (08H). The Write Register command writes data to the Register File. Data
can be written 1-256 bytes at a time (256 bytes can be written by setting size to zero). If
the device is not in DEBUG Mode, the address and data values are discarded. If the Read
Protect option bit is enabled, then only writes to the Flash Control Registers are allowed
and all other register write data values are discarded.
DBG ← 08H
DBG ← {4’h0,Register Address[11:8]}
DBG ← Register Address[7:0]
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DBG ← Size[7:0]
DBG ← 1-256 data bytes
Read Register (09H). The Read Register command reads data from the Register File.
Data can be read 1-256 bytes at a time (256 bytes can be read by setting size to zero). If the
device is not in DEBUG Mode or if the Read Protect option bit is enabled, this command
returns FFH for all the data values.
DBG ← 09H
DBG ← {4’h0,Register Address[11:8]
DBG ← Register Address[7:0]
DBG ← Size[7:0]
DBG 1-256 data bytes
Write Program Memory (0AH). The Write Program Memory command writes data to
program memory. This command is equivalent to the LDC and LDCI instructions. Data
can be written 1-65536 bytes at a time (65536 bytes can be written by setting size to zero).
The on-chip Flash Controller must be written to and unlocked for the programming opera-
tion to occur. If the Flash Controller is not unlocked, the data is discarded. If the device is
not in DEBUG Mode or if the Read Protect option bit is enabled, the data is discarded.
DBG ← 0AH
DBG ← Program Memory Address[15:8]
DBG ← Program Memory Address[7:0]
DBG ← Size[15:8]
DBG ← Size[7:0]
DBG ← 1-65536 data bytes
Read Program Memory (0BH). The Read Program Memory command reads data from
program memory. This command is equivalent to the LDC and LDCI instructions. Data
can be read 1-65536 bytes at a time (65536 bytes can be read by setting size to zero). If the
device is not in DEBUG Mode or if the Read Protect option bit is enabled, this command
returns FFH for the data.
DBG ← 0BH
DBG ← Program Memory Address[15:8]
DBG ← Program Memory Address[7:0]
DBG ← Size[15:8]
DBG ← Size[7:0]
DBG 1-65536 data bytes
Write Data Memory (0CH). The W rite Data Memory command writes data to Data Mem-
ory. This command is equivalent to the LDE and LDEI instructions. Data can be written 1-
65536 bytes at a time (65536 bytes can be written by setting size to zero). If the device is
not in DEBUG Mode or if the Read Protect option bit is enabled, the data is discarded.
DBG ← 0CH
DBG ← Data Memory Address[15:8]
DBG ← Data Memory Address[7:0]
DBG ← Size[15:8]
DBG ← Size[7:0]
DBG ← 1-65536 data bytes
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Read Data Memory (0DH). The Read Da ta Me mo ry command reads from Data Memory.
This command is equivalent to the LDE and LDEI instructions. Data can be read 1-65 53 6
bytes at a time (65536 bytes can be read by setting size to zero). If the device is not in
DEBUG Mode, this command returns FFH for the data.
DBG ← 0DH
DBG ← Data Memory Address[15:8]
DBG ← Data Memory Address[7:0]
DBG ← Size[15:8]
DBG ← Size[7:0]
DBG 1-65536 data bytes
Read Program Memory CRC (0EH). The Read Program Memory CRC command com-
putes and returns the CRC (cyclic redundancy check) of program memory using the 16-bit
CRC-CCITT polynomial. If the device is not in DEBUG Mode, this command returns
FFFFH for the CRC value. Unlike most other OCD Read commands, there is a delay from
issuing of the command until the OCD returns the data. The OCD reads program memory,
calculates the CRC value, and returns the result. The delay is a function of the program
memory size and is approximately equal to the system clock period multiplied by the num-
ber of bytes in program memory.
DBG ← 0EH
DBG CRC[15:8]
DBG CRC[7:0]
Step Instruction (10H). The Step Instruction command steps one assembly instruction at
the current Program Counter (PC) location. If the device is not in DEBUG Mode or the
Read Protect option bit is enabled, the OCD ignores this command.
DBG ← 10H
Stuff Instruction (11H). The Stuff Instruction command steps one assembly instruction
and allows specification of the first byte of the instruction. The remaining 0-4 bytes of the
instruction are read from program memory. This command is useful for stepping over
instructions where the first byte of t he instruction has b een overwritt en by a breakp oint. If
the device is not in DEBUG Mode or the Read Protect option bit is enabled, the OCD
ignores this command.
DBG ← 11H
DBG ← opcode[7:0]
Execute Instruction (12H). The Execute Instruction command allows sending an entire
instruction to be executed to the eZ8 CPU. This command can also step over breakpoin ts.
The number of bytes to send for the instruction depends on the op code. If the device is not
in DEBUG Mode or the Read Protect option bit is enabled, the OCD ignores this com-
mand
DBG ← 12H
DBG ← 1-5 byte opcode
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On-Chip Debugger Control Register Definitions
This section describes the features of the On-Chip Debugger Control and Status registers.
OCD Control Register
The OCD Control Register, shown in Table 103, controls the state of the On-Chip Debug-
ger. This register enters or exits DEBUG Mode and enables the BRK instruction.
A reset and stop function can be achieved by writing 81H to this register. A reset and go
function can be achieved by writing 41H to this register. If the device is operating in
DEBUG Mode, a run function can be implemented by writing 40H to this register.
Table 103. OCD Control Register (OCDCTL)
Bit 7 6 5 4 3 2 1 0
Field
DBGMODE
BRKEN DBGACK BRKLOOP Reserved RST
RESET 0
R/W R/W R R/W
Bit Description
[7]
DBGMODE
DEBUG Mode
Setting this bit to 1 causes the device to enter DEBUG Mode. When in DEBUG Mode, the
eZ8 CPU stops fetching new instructions. Clearing this bit causes the eZ8 CPU to start run-
ning again. This bit is automatically set when a BRK instruction is decoded a nd br eakpoints
are enabled. If the Read Protect option bit is enabled, this bit can only be cleared by reset-
ting the device, it cannot be written to 0.
0 = TheZ8 Encore! XP F64xx Series device is operating in NORMAL Mode.
1 = The Z8 Encore! XP F64xx Series device is in DEBUG Mode.
[6]
BRKEN Breakpoint Enable
This bit controls the behavior of the BRK instruction (op code 00H). By default, breakpoints
are disabled and the BRK instruction behaves like a NOP. If this bit is set to 1 and a BRK
instruction is decoded, the OCD takes action dependent upon the BRKLOOP bit.
0 = BRK instruction is disabled.
1 = BRK instruction is enabled.
[5]
DBGACK Debug Acknowledge
This bit enables the debug acknowledge feature. If this bit is set to 1, then the OCD sends
an Debug Acknowle dg e ch ar ac te r (F FH) to the host when a break po in t occu rs .
0 = Debug Acknowledge is disable d .
1 = Debug Acknowledg e is en ab led .
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OCD Status Register
The OCD S tatus Register , show n in Table 104, reports status information about the current
state of the debugger and the system.
[4]
BRKLOOP Breakpoint Loop
This bit determines what action the OCD takes when a BRK instruction is decoded if break-
points are en able d (BRKEN is 1). If th is bit is 0, then the DBGMODE bit is automatically set
to 1 and the OCD entered DEBUG Mode. If BRKLOOP is set to 1, then the
eZ8 CPU loops on the BRK instruction.
0 = BRK instruction sets DBGMODE to 1.
1 = eZ8 CPU loops on BRK instruction.
[3:1] Reserved
These bits are reserved and must be programmed to 000.
[0]
RST Reset
Setting this bit to 1 resets the Z8 Encore! XP F64xx Seri es devices. The devices go through
a normal Power-On Reset sequence with the exception that the On-Chip Debugger is not
reset. This bit is automatically cleared to 0 when the reset finishes.
0 = No effect.
1 = Reset the Z8 Encore! XP F64xx Series device.
Table 104. OCD Status Register (OCDSTAT)
Bit 76543210
Field IDLE HALT RPEN Reserved
RESET 0
R/W R
Bit Description
[7]
IDLE CPU Idle
This bit is set if the part is in DEBUG Mode (DBGMODE is 1), or if a BRK instruction occurred
since the last time OCDCTL was written. This can be used to determine if the CPU is running
or if it is idling.
0 = The eZ8 CPU is running.
1 = The eZ8 CPU is either stopped or looping on a BRK instruction.
[6]
HALT HALT Mode
0 = The device is not in HALT Mode.
1 = The device is in HALT Mode.
Bit Description (Continued)
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[5]
RPEN Read Protect Option Bit Enabled
0 = The Read Protect option bit is disabled (1).
1 = The Read Protect option bit is enabled (0), disabling many OCD commands.
[4:0] Reserved
These bits are reserved and must be programmed to 00000.
Bit Description (Continued)
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On-Chip Oscillator
The products in the Z8 Encore! XP F64xx Series feature an on-chip oscillator for use with
external crystals with frequencies from 32 kHz to 20 MHz. In addition, the oscillator can
support external RC networks with oscillation frequencies up to 4 MHz or ceramic resona-
tors with oscillation frequencies up to 20 MHz. This oscillator generates the primary sys-
tem clock for the internal eZ8 CPU and the majority of the on-chip peripherals.
Alternatively, the XIN input pin can also accept a CMOS-level clock input signal (32 kHz–
20 MHz). If an external clock generator is used, the XOUT pin must be left unconnected.
When configured for use with crystal oscillators or external clock dri vers, the frequency of
the signal on the XIN input pin determines the frequency of the system clock (that is, no
internal clock divider). In RC operation, the system clock is driven by a clock divider
(divide by 2) to ensure 50% duty cycle.
Operating Modes
The Z8 Encore! XP F64xx Series products support four different oscillator modes:
•
On-chip oscillator configured for use with external RC networks (< 4 MHz)
•
Minimum power for use with very low frequency crystals (32 kHz to 1.0 MHz)
•
Medium power for use with medium frequency crystals or ceramic resonators (0.5 MHz
to 10.0 MHz)
•
Maximum power for use with high frequency crystals or ceramic resonators (8.0 MHz
to 20.0 MHz)
The oscillator mode is selected through user-progr ammable option bits. For more informa-
tion, see the Option Bits chapter on page 180.
Crystal Oscillator Operation
Figure 40 displays a recommended configuration for connection with an external funda-
mental-mode, parallel-resonant crystal operating at 20 MHz. Recommended 20 MHz crys-
tal specifications are provided in Table 105. Resistor R1 is optional and limits total power
dissipation by the crystal. The printed circuit board layout must add no more than 4 pF of
stray capacitance to either the XIN or XOUT pins. If oscillation does not occur, reduce the
values of capacitors C1 and C2 to decrease loading.
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Figure 40. Recommended 20 MHz Crystal Oscillator Configuration
Table 105. Recommended Crystal Oscillator Specifications (20 MHz Operation)
Parameter Value Units Comments
Frequency 20 MHz
Resonance Parallel
Mode Fundamental
Series Resistance (RS) 25 W Maximum
Load Capacitance (CL)20 pF Maximum
Shunt Capacitance (C0) 7 pF Maximum
Drive Level 1 mW Maximum
C2 = 22pFC1 = 22pF
Crystal
X
OUT
X
IN
On-Chip Oscillator
R1 = 220
Ω
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Oscillator Operation with an External RC Network
The External RC Oscillator mode is applicable to timing-insensitive applications.
Figure 41 displays a recomm ended configuration for connection with an external resistor-
capacitor (RC) network.
An external resistance value of 45 kΩ is recommended for oscillator operation with an
external RC network. The minimum resistance value to ensure operation is 40 kΩThe
typical oscillator frequency can be estimated from the values of the resistor (R in kΩ) and
capacitor (C in pF) elements using the following equation:
Figure 42 displays the typical (3.3 V and 25°C) oscillator frequency as a function of the
capacitor (C in pF) employed in the RC network assuming a 45 kΩ external resistor. For
very small values of C, the parasitic capacitance of the oscillator XIN pin and the printed
circuit board should be included in the estimation of the oscillator frequency.
It is possible to operate the RC oscillator using only the parasitic capacitance of the pack-
age and printed circuit board. To minimize sensitivity to external parasitics, external
capacitance values in excess of 20 pF are recommended.
Figure 41. Connecting the On-Chip Oscillator to an External RC Network
C
XIN
R
VDD
Oscillator Frequency (kHz) 16
10
0.4 R C4C+
---------------------------------------------------------
=
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When using the external RC oscillator mode, the oscillator may stop oscillating if the
power supply drops below 2.7 V, but before the power supply dr ops to the voltage brown-
out threshold. The oscillator will resume oscillation as soon as the supply voltage exceeds
2.7 V.
Figure 42. Typical RC Oscillator Frequency as a Function of the External Capacitance
with a 45 kΩ Resistor
0
250
500
750
1000
1250
1500
1750
2000
2250
2500
2750
3000
3250
3500
3750
4000
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500
C (pF)
Frequ ency (kHz)
Caution:
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Electrical Characteristics
The data in this chapter represents all known data prior to qualification and characteriza-
tion of the Z8 Encore! XP F64xx Series of products, and is therefore subject to change.
Additional electrical characteristics may be found in the individual chapters of this docu-
ment.
Absolute Maximum Ratings
Stresses greater than those listed in Table 106 may cause permanent damage to the device.
These ratings are stress ratings only . Operation of the device at any condition outside those
indicated in the operational sections of these specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
For improved reliability, unused inputs must be tied to one of the supply voltages (VDD or
VSS).
Table 106. Absolute Maximum Ratings
Parameter Minimum Maximum Units Notes
Ambient temperature under bias –40 +125 C
Storage temper ature –65 +150 C
Voltage on any pin with respect to VSS –0.3 +5.5 V 1
Voltage on VDD pin with respect to VSS –0.3 +3.6 V
Maximum current on input and/or inactive output pin –5 +5 µA
Maximum output current from active output pin –2 5 +25 mA
80-pin QFP maximum ratings at –40°C to 70°C
Total power dissipation 550 mW
Maximum current into VDD or out of VSS 150 mA
80-pin QFP maximum ratings at 70°C to 125°C
Total power dissipation 200 mW
Maximum current into V DD or out of VSS 56 mA
68-pin PLCC maximum ratings at –40°C to 70°C
Total power dissipation 1000 mW
Maximum current into V DD or out of VSS 275 mA
68-pin PLCC maximum ratings at
7
0°C to 125°C
Total power dissipation 500 mW
Maximum current into V DD or out of VSS 140 mA
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64-pin LQFP maximum ratings at –40°C to 70°C
Total power dissipation 1000 mW
Maximum current into VDD or out of VSS 275 mA
64-pin LQFP maximum ratings at 70°C to 125°C
Total power dissipation 540 mW
Maximum current into V DD or out of VSS 150 mA
44-pin PLCC maximum ratings at –40°C to 70°C
Total power dissipation 750 mW
Maximum current into V DD or out of VSS 200 mA
44-pin PLCC maximum ratings at 70°C to 125°C
Total power dissipation 295 mW
Maximum current into V DD or out of VSS 83 mA
44-pin LQFP maximum ratings at –40°C to 70°C
Total power dissipation 750 mW
Maximum current into V DD or out of VSS 200 mA
44-pin LQFP maximum ratings at 70°C to 125°C
Total power dissipation 360 mW
Maximum current into V DD or out of VSS 100 mA
Note: This voltage applies to all pins, with the exception of VDD, AVDD, pins supporting analog input (ports B and H),
RESET, and where noted otherwise.
Table 106. Absolute Maximum Ratings (Continued)
Parameter Minimum Maximum Units Notes
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DC Characteristics
Table 107 lists the DC characteristics of the Z8 Encore! XP F64xx Series products. All
voltages are referenced to VSS, the primary system ground.
Table 107. DC Characteristics
Symbol Parameter
TA = –40°C to 125°C
Units ConditionsMinimum Typical Maximum
VDD Supply Voltage 3.0 – 3.6 V
VIL1 Low Level Input
Voltage –0.3 – 0.3*VDD V For all input pins except
RESET, DBG, X
IN
VIL2 Low Level Input
Voltage –0.3 – 0.2*VDD V For RESET, DBG, and
X
IN
.
VIH1 High Level Input
Voltage 0.7*VDD – 5.5 V Port A, C, D, E, F, and G
pins.
VIH2 High Level Input
Voltage 0.7*VDD –V
DD+0.3 V Port B and H pins.
VIH3 High Level Input
Voltage 0.8*VDD –V
DD+0.3 V RESET, DBG, and X
IN
pins
VOL1 Low Level Output
Voltage Standard Drive ––0.4VI
OL = 2 mA; V
DD
= 3.0 V
High Output Driv e dis-
abled.
VOH1 High Level Output
Voltage Standard Drive 2.4 – – V IOH = –2 mA; V
DD
= 3.0 V
High Output Driv e dis-
abled.
VOL2 Low Level Output
Voltage High Drive ––0.6VI
OL = 20 mA; V
DD
= 3.3 V
High Output Drive
enabled
TA = –40°C to +70°C
VOH2 High Level Output
Voltage
High Drive
2.4 – – V IOH = –20 mA; V
DD
= 3.3 V
High Output Drive
enabled;
TA = –40°C to +70°C
VOL3 Low Level Output
Voltage
High Drive
––0.6VI
OL = 15 mA; V
DD
= 3.3 V
High Output Drive
enabled;
TA = +70°C to +105°C
Notes:
1. This condition excludes all pins that have on-chip pull-ups, when driven Low.
2. These values are provided for design guidance only and are not tested in production.
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VOH3 High Level Output
Voltage
High Drive
2.4 – – V IOH = 15 mA; V
DD
= 3.3 V
High Output Drive
enabled;
TA = +70°C to +105°C
VRAM RAM Data Retention 0.7 – – V
IIL Input Leakage Cu rrent –5 – +5 µA VDD = 3.6 V;
VIN = V
DD
or V
SS
1
ITL Tri-State Lea k ag e
Current –5 – +5 µA VDD = 3.6 V
CPAD GPIO Port Pad
Capacitance –8.0
2–pF
CXIN X
IN
Pad Capacitance – 8.02–pF
CXOUT X
OUT
Pad Capacitance – 9.52–pF
IPU Weak Pull-up Current 30 100 350 mA VDD = 3.0–3.6 V
IDDA Active Mode Supply
Current; GPIO pins are
configured as outputs
(see Figure 43 on page
205 and Figure 44 on
page 206)
–1116mAV
DD = 3.6 V, FSYSCLK =
20 MHz
––12mAV
DD = 3.3 V
–911mAV
DD = 3.6 V, FSYSCLK =
10 MHz
––9mAV
DD = 3.3 V
IDDH HALT Mode Supply
Current; GPIO pins
configured as outputs
(see Figure 45 on page
207 and Figure 46 on
page 208)
–47mAV
DD = 3.6 V, FSYSCLK =
20 MHz
––5mAV
DD = 3.3 V
–35mAV
DD = 3.6 V, FSYSCLK =
10 MHz
––4mAV
DD = 3.3 V
Table 107. DC Characteristics (Continued)
Symbol Parameter
TA = –40°C to 125°C
Units ConditionsMinimum Typical Maximum
Notes:
1. This condition excludes all pins that have on-chip pull-ups, when driven Low.
2. These values are provided for design guidance only and are not tested in production.
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IDDS Stop Mode Supply
Current; GPIO pins
configured as outputs
(see Figure 47 on page
209 and Figure 48 on
page 210)
– 520 µA VBO and WDT enabled
700 VDD = 3.6 V
650 VDD = 3.3 V
– 10 µA VBO disabled,
WDT enabled,
T
A
= 0 to 70ºC
25 VDD = 3.6 V
20 VDD = 3.3 V
– – µA VBO disabled,
WDT enabled,
T
A
= –40 to +105ºC
80 VDD = 3.6 V
70 VDD = 3.3 V
– – µA VBO disabled,
WDT enabled,
T
A
= –40 to +125ºC
250 VDD = 3.6 V
150 VDD = 3.3 V
Table 107. DC Characteristics (Continued)
Symbol Parameter
TA = –40°C to 125°C
Units ConditionsMinimum Typical Maximum
Notes:
1. This condition excludes all pins that have on-chip pull-ups, when driven Low.
2. These values are provided for design guidance only and are not tested in production.
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Figure 43 displays the typical active mode current co nsumpti on wh ile operatin g at 25 ºC
plotted opposite the system clock frequency. All GPIO pins are configured as outputs and
driven High.
Figure 43. Typical Active Mode IDD vs. System Clock Frequency
0
3
6
9
12
15
05101520
System Clock Frequency (MHz)
Idd (mA
)
3.0V 3.3V 3.6V
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Figure 44 displays the maximum active mode current consumption across the full operat-
ing temperature range of the device and plotted opposite the system clock frequency. All
GPIO pins are configured as outputs and driven High.
Figure 44. Maximum Active Mode IDD vs. System Clock Frequency
0
3
6
9
12
15
0 5 10 15 20
System Clock Frequency (MHz)
Idd (mA)
3.0V 3.3V 3.6V
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Figure 45 displays the typical current consumption in HALT Mode while operating at
25ºC plotted opposite the system clock frequency. All GPIO pins are configured as outputs
and driven High.
Figure 45. Typical HALT Mode IDD vs. System Clock Frequency
0
1
2
3
4
5
0 5 10 15 20
System Clock Frequency (MHz)
HALT Idd (mA
)
3.0V 3.3V 3.6V
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Figure 46 displays the maximum HALT Mode current consumption across the full operat-
ing temperature range of the device and plotted opposite the system clock frequency. All
GPIO pins are configured as outputs and driven High.
Figure 46. Maximum HALT Mode ICC vs. System Clock Frequency
0
1
2
3
4
5
6
0 5 10 15 20
System Clock Frequency (M Hz)
Halt Id d ( mA)
3.0V 3.3V 3.6V
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Figure 47 displays the maximum cu rrent consumption in STOP Mode with the VBO and
Watc hdog Timer ena bled plotted opposite th e power supply voltage. All GPIO pins are
configured as outputs and driven High.
Figure 47. Maximum STOP Mode IDD with VBO Enabled vs. Power Supply Vo ltage
400
450
500
550
600
650
700
3.0 3.2 3.4 3.6
Vdd (V)
STOP Idd (microamperes)
-40/105C 0/70C 25C T ypical
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Figure 48 displays the maximum cu rrent consumption in STOP Mode with the VBO dis-
abled and Watchdog Timer enabled plotted opposite the power supply voltage. All GPIO
pins are configured as outputs and driven High. Disabling the Watchdog Timer and its
internal RC oscillator in STOP Mode will provide some additional reduction in STOP
Mode current consumption. This small current reduction would be indistinguishable on
the scale shown in the figure.
Figure 48. Maximum STOP Mode IDD with VBO Disabled vs. Power Supply Voltage
0.00
20.00
40.00
60.00
80.00
100.00
120.00
3.0 3.2 3.4 3.6
Vdd (V)
STOP Idd (microamperes)
25C T ypical 0/70C -40/105C -40/+125C
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On-Chip Peripheral AC and DC Electrical Characteristics
Table 108. Power-On Reset and Voltage Brown-Out Electrical Ch aracteristics and Timing
Symbol Parameter
TA = –40°C to 125°C
Units ConditionsMinimum Typical* Maximum
VPOR Power-On Reset
Voltage Threshold 2.40 2.70 2.90 V VDD = VPOR
VVBO Voltage Brown-Out
Reset Voltage
Threshold
2.30 2.60 2.85 V VDD = VVBO
VPOR to VVBO
hysteresis 50 100 – mV
Starting VDD voltage to
ensure valid Power-On
Reset.
–V
SS –V
TANA Power-On Reset
Analog Delay –50–µsV
DD > VPOR; TPOR Digital
Reset delay follows TANA
TPOR Power-On Reset Digital
Delay – 6.6 – ms 66 WDT Oscillator cycles
(10 kHz) + 16 System
Clock cycles (20 MHz)
TVBO Voltage Brown-Out
Pulse Rejection Period –10–µsV
DD < VVBO to ge nerate a
Reset.
TRAMP Time for V
DD
to
transition from VSS to
VPOR to ensure valid
Reset
0.10 – 100 ms
Note: *Data in the typical column is from characterization at 3.3 V and 0°C. These values are provided for design guid-
ance only and are not tested in production.
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Table 109. External RC Oscillator Electrical Characteristics and Timing
Symbol Parameter
TA = –40°C to 125°C
Units ConditionsMinimum Typical* Maximum
VDD Operating Voltage
Range 2.701––V
REXT External Resistance
from X
IN
to V
DD
40 45 200 kΩVDD = VVBO
CEXT External Capacitance
from X
IN
to V
SS
0 20 1000 pF
FOSC External RC Oscillation
Frequency ––4MHz
Note: *When using the external RC oscillator mode, the oscillator may stop oscillating if the power supply drops below
2.7 V, but before the power suppl y drops to the voltage brown-out threshold. The oscillator will resume oscilla-
tion as soon as the su pp l y vol ta g e exc ee d s 2.7 V.
Table 110. Reset and Stop Mode Recovery Pin Timing
Symbol Parameter
TA = –40°C to 125°C
Units ConditionsMinimum Typical Maximum
TRESET RESET pin assertion to
initiate a system reset. 4––T
CLK Not in STOP Mode.
TCLK = System Clock
period.
TSMR Stop Mode Recovery
pin Pulse Rejection
Period
10 20 40 ns RESET, DBG, and GPIO
pins configured as SMR
sources.
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Table 111 list the Flash memory electrical characteristics and timing.
Table 112 lists the Watchdog Timer electrical characteristics and timing.
Table 111. Flash Memory Electrical Characteristics and Timing
Parameter
VDD = 3.0–3.6 V
TA = –40°C to 125°C
Units NotesMinimum Typical Maximum
Flash Byte Read Time 50 – – ns
Flash Byte Program
Time 20 – 40 µs
Flash Page Erase Time 10 – – ms
Flash Mass Erase Time 200 – – ms
Writes to Single
Address Before Next
Erase
––2
Flash Row Program
Time – – 8 ms Cumulative program time for single
row cannot exceed limit before next
erase. This parameter is only an
issue when bypassing the Flash
Controller.
Data Retention 100 – – years 25°C
Endurance, –40°C to
105°C 10,000 – – cycles Program/erase cycles
Endurance, 106°C to
125°C 1,000 – – cycles Program/erase cycles
Table 112. Watch dog Timer Electrical Characteristics and Timing
Symbol Parameter
VDD = 3.0–3.6 V
TA = –40°C to 125°C
Units ConditionsMinimum Typical Maximum
FWDT WDT Oscillator
Frequency 51020kHz
IWDT WDT Oscillator Current
including internal RC
Oscillator
–< 15µA
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Table 113 provides electrical characteristics and timing information for the Analog-to-
Digital Converter. Figure 49 displays the input frequency response of the ADC.
Table 113. Analog-to-Digital Converter Electrical Characteristics and Timing
Symbol Parameter
VDD = 3.0 V–3.6 V
TA = –40°C to 125°C
Units ConditionsMinimum Typical Maximum
Resolution 10 – – bits Extern al V REF = 3.0 V;
Differential Nonlinearity
(DNL) –1.0 +1.0 lsb Guaranteed by design
Integral Nonlinearity
(INL) –3.0 +1.0 3 .0 lsb External VREF = 3.0 V
DC Offset Error –35 – 25 mV 80-pin QFP and 64-pin
LQFP packages.
DC Offset Error –50 – 25 mV 44-pin LQFP, 44-pin
PLCC, and 68-pin PLCC
packages.
VREF Internal Reference
Voltage 1.9 2.0 2.4 V VDD = 3.0 V–3.6 V
TA = –40°C to 105°C
VCREF Voltage Coefficient of
Internal Reference
Voltage
–78–mV/VV
REF variation as a func-
tion of AV
DD
.
TCREF Temperature
Coefficient of Internal
Reference Voltage
–1–mV/°C
Single-Shot
Conversion Period – 5129 – cycles System clock cycles
Continuous Conversion
Period – 256 – cycles System clock cycles
RSAnalog Source
Impedance – – 150 W Recommended
Zin Input Impedance 150 kΩ20MHz system clock.
Input impedance
increases with lower sys-
tem clock frequency.
VREF External Reference
Voltage AV
DD
VAV
DD
<= V
DD
. When
using an external refer-
ence voltage, decoupling
capacitance should be
placed from V
REF
to
AV
SS
.
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IREF Current draw into V
REF
pin when driving with
external source.
25.0 40.0 A
Figure 49. Analog-to-Digital Converter Frequency Response
Table 113. Analog-to-Digital Converter Electrical Characteristics and Timing (Continued)
Symbol Parameter
VDD = 3.0 V–3.6 V
TA = –40°C to 125°C
Units ConditionsMinimum Typical Maximum
Frequency (kHz)
0.9
0.8
0.7
0.6
0.3
0.4
0.2
0.1
0
Frequency Response
1
0.5
0 5 10 15 20 25 30
–6 dB
–3 dB
ADC Magnitude Transfer Function (Linear Scale)
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AC Characteristics
This section provides AC characteristics and timing data which assumes a standard load of
50 pF on all outputs. Table 114 lists the Z8 Encore! XP F64xx Series AC characteristics
and timing.
Table 114. AC Characteristics
Symbol Parameter
VDD = 3.0 V–3.6V
TA = –40°C to 125°C
Units ConditionsMinimum Maximum
FSYSCLK System Clock Frequency – 20.0 MHz Read-only from Flash memory.
0.032768 20.0 MH z Pr o gr am or er asure of Flash
memory.
FXTAL Crystal Oscillator Frequency 0.032768 20.0 MHz System clock frequencies
below the crystal oscillator mini-
mum require an external clock
driver.
TXIN Crystal Oscillator Clock
Period 50 – ns TCLK = 1/FSYSCLK
TXINH System Clock High Time 20 ns
TXINL System Clock Low Time 20 ns
TXINR System Clock Rise Time – 3 ns TCLK = 50 ns. Slower rise times
can be tolerated with longer
clock periods.
TXINF System Clock Fall Time – 3 ns TCLK = 50 ns. Slower fall times
can be tolerated with longer
clock periods.
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General-Purpose I/O Port Input Data Sample Timing
Figure 50 displays timing of the GPIO Port input sampling. Table 115 lists the GPIO port
input timing.
Figure 50. Port Input Sample Timing
Table 115. GPIO Port Input Timing
Parameter Abbreviation
Delay (ns)
Min Max
TS_PORT Port Input Transition to X
IN
Fall Setup Time (not pictured) 5 –
TH_PORT X
IN
Fall to Port Input Transition Hold Time (not pictured) 6 –
TSMR GPIO Port Pin Pulse Width to Insure Stop Mode Recovery (for
GPIO Port pins enabled as SMR sources) 1 s
System
TCLK
GPIO Pin
Port Value
Changes to 0
0 Latched
Into Port Input
Input Value
GPIO Input
Data Latch
Clock
Data Register
GPIO Data
Read on Data Bus
GPIO Data Register
Value 0 Read
by eZ8 CPU
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General-Purpose I/O Port Output Timing
Figure 51 and Table 116 provide timing information for GPIO port pins.
Figure 51. GPIO Port Output Timing
Table 116. GPIO Port Output Timing
Parameter Abbreviation
Delay (ns)
Minimum Maximum
GPIO port pins
T1X
IN
Rise to Port Output Valid Delay – 20
T2X
IN
Rise to Port Output Hold Time 2 –
X
IN
Port Output
TCLK
T1 T2
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On-Chip Debugger Timing
Figure 52 and Table 117 prov ide timing information for the DBG pin. The DBG pin tim-
ing specifications assume a 4 µs maximum rise and fall time.
Figure 52. On-Chip Debugger Timing
Table 117. On-Chip Debugger Timin g
Parameter Abbreviation
Delay (ns)
Minimum Maximum
DBG
T1X
IN
Rise to DBG Valid Delay – 30
T2X
IN
Rise to DBG Output Hold Time 2 –
T3DBG to X
IN
Rise Input Setup Time 10 –
T4DBG to X
IN
Rise Input Hold Time 5 –
DBG frequency System Clock/4
X
IN
DBG
TCLK
T1 T2
(Output)
DBG
T3 T4
(Input)
Output Data
Input Data
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SPI Master Mode Timing
Figure 53 and Table 118 provide timing information for SPI Master Mode pins. Timing is
shown with SCK rising edge used to source MOSI output data, SCK falling edge used to
sample MISO input data. Timing on the SS output pin(s) is controlled by software.
Figure 53. SPI Master Mode Timing
Table 118. SPI Master Mode Timing
Parameter Abbreviation
Delay (ns)
Min Max
SPI Master
T1SCK Rise to MOSI output Valid Delay –5 +5
T2MISO input to SCK (receive edge) Setup Time 20
T3MISO input to SCK (receive edge) Hold Time 0
SCK
MOSI
T1
(Output)
MISO
T2 T3
(Input)
Output Data
Input Data
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SPI Slave Mode Timing
Figure 54 and Table 119 provide timing information for the SPI slave mode pins. Timing
is shown with SCK rising edge used to source MISO output data, SCK falling edge used to
sample MOSI input data.
Figure 54. SPI Slave Mode Timing
Table 119. SPI Slave Mode Timing
Parameter Abbreviation
Delay (ns)
Minimum Maximum
SPI Slave
T1SCK (transmit edge) to MISO output Valid Delay 2 * X
IN
period 3 * X
IN
period +
20 nsec
T2MOSI input to SCK (receive edge) Setup Time 0
T3MOSI input to SCK (receive edge) Hold Time 3 * X
IN
period
T4SS input assertion to SCK setup 1 * X
IN
period
SCK
MISO
T1
(Output)
MOSI
T2 T3
(Input)
Output Data
Input Data
SS
(Input)
T4
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I2C Timing
Figure 55 and Table 120 provide timing information for I2C pins.
Figure 55. I2C Timing
Table 120. I2C Timing
Parameter Abbreviation
Delay (ns)
Minimum Maximum
I2C
T1SCL Fall to SDA output delay SCL period/4
T2SDA Input to SCL rising edge Setup Time 0
T3SDA Input to SCL falling edge Hold Time 0
SCL
SDA
T1
(Output)
SDA
T2
nput)
Output Data
Input Data
(Output)
T3
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UART Timing
Figure 56 and Table 121 provide timing information for UART pins for the case where the
Clear To Send input pin (CTS) is used for flow control. In this example, it is assumed that
the Driver Enable polarity has been configured to be Active Low and is represented here
by DE. The CTS to DE assertion delay (T1) assumes the UART Transmit Data Register
has been loaded with data prior to CTS assertion.
Figure 56. UART Timing with CTS
Table 121. UART Timin g with CTS
Parameter Abbreviation
Delay (ns)
Minimum Maximum
T1CTS Fall to DE Assertion Delay 2 * X
IN
period 2 * X
IN
period +
1 bit period
T2DE Assertion to TxD Falling Edge (Start) Delay 1 bit period 1 bit period +
1 * X
IN
period
T3End of stop bit(s) to DE Deass ertion Delay 1 * X
IN
period 2 * X
IN
period
T
1
T
2
TxD
(Output)
DE
(Output)
CTS
(Input)
Start Bit 0
T
3
Bit 7 Parity Stop
Bit 1
End of
Stop Bit(s)
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Figure 57 and Table 122 provide timing information for UART pins for the case where the
Clear To Send input signal (CTS) is not used for flow control. In this example, it is
assumed that the Driver Enable polarity has been configured to be Active Low and is rep-
resented here by DE. DE asserts after the UART Transmit Data Register has been written.
DE remains asserted for multiple characters as long as the Transmit Data Register is writ-
ten with the next character before the current character has completed.
Figure 57. UART Timing without CTS
Table 122. UART Timing without CTS
Parameter Abbreviation
Delay (ns)
Minimum Maximum
T1DE Assertion to TxD Falling Edge (Start) Delay 1 bit period 1 bit period +
1 * X
IN
period
T2End of stop bit(s) to DE Deass ertion Delay 1 * X
IN
period 2 * X
IN
period
T
1
TxD
(Output)
DE
(Output)
Start Bit 0
T
2
Bit 7 Parity Stop
Bit 1
End of
Stop Bit(s)
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eZ8 CPU Instruction Set
This chapter describes the following features of the eZ8 CPU instruction set:
Assembly Language Programming Introduction: see page 225
Assembly Language Syntax: see page 226
eZ8 CPU Instruction Notation: see page 227
eZ8 CPU Instruction Classes: see page 230
eZ8 CPU Instruction Summary: see page 234
Assembly Language Programming Introduction
The eZ8 CPU assembly language provides a means for writing an application program
without having to be concerned with actual memory addresses or machine instruction for-
mats. A program written in assembly language is called a source program. Assembly lan-
guage allows the use of symbolic addresses to identify memory locations. It also allows
mnemonic codes (op codes and operands ) to represent the instructions themselves. The op
codes identify the instruction while the operands represent memory locations, registers, or
immediate data values.
Each assembly language program consists of a series of symbolic commands called state-
ments. Each statement can contain labels, operations, operands and comments.
Labels can be assigned to a particular instruction step in a source program. The label iden-
tifies that step in the program as an entry point for use by other instructions.
The assembly language also includes assembler directives that supplement the machine
instruction. The assembler directives, or pseudo-ops, are not translated into a machine
instruction. Rather, the pseudo-ops are interpreted as directives that control or assist the
assembly process.
The source program is processed (assembled) by the assembler to obtain a machine lan-
guage program called the object code. The object code is executed by the eZ8 CPU. An
example segment of an assembly language program is detailed in the following example.
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Assembly Language Source Program Example
Assembly Language Syntax
For proper instruction execution, eZ8 CPU assembly language syntax requires that the
operands be written as destination, source. After assembly, the object code usually pres-
ents the operands in the source, destination order; however, ordering is op code-depen-
dent. The following instruction examples illustrate the format of some basic assembly
instructions and the resulting object code produced by the assembler. This binary format
must be followed if you prefer manual program coding or intend to implement your own
assembler.
Example 1. If the contents of Registers 43H and 08H are added and the result is stored in
43H, the assembly syntax and resulting object code result is shown in Ta ble 123.
Example 2. In general, when an instruction format requires an 8-bit register address, that
address can specify any register location in the range 0–255 or, using Escaped Mode
Addressing, a Working Register R0–R15. If the contents of Register 43H and Working
Register R8 are added and the result is stored in 43H, the assembly syntax and resulting
object code result is shown in Table 124.
JP START ; Everything after the semicolon is a comment.
START: ; A label called “START”. The first instruction
; (JP START) in this example causes program
; execution to jump to the point within the
; program where the START label occurs.
LD R4, R7 ; A Load (LD) instruction with two operands. The
; first operand, Working Register R4, is the
; destination. The second operand, Working
; Register R7, is the source. The contents of R7
; is written into R4.
LD 234H, #%01 ; Another Load (LD) instruction with two operands.
; The first operand, Extended Mode Register
; Address 234H, identifies the destination. The
; second operand, Immediate Data value 01H, is the
; source. The value 01H is written into the
; Register at address 234H.
Table 123. Assembly Language Syntax Example 1
Assembly Language Code ADD 43H, 08H (ADD dst, src)
Object Code 04 08 43 (OPC src, dst)
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Refer to the device-specific Product Specification to determine the exact register file range
available. The register file size varies, depending on the device type.
eZ8 CPU Instruction Notation
In the eZ8 CPU Instruction Summary and Description sections, the operands, condition
codes, status flags, and address mode s are represented by a notational shorthand that is
described in Table 125.
Table 124. Assembly Language Syntax Example 2
Assembly Language Code ADD 43H, R8 (ADD dst, src)
Object Code 04 E8 43 (OPC src, dst)
Table 125. Notational Shorthand
Notation Description Operand Range
b Bit b b represents a value from 0 to 7 (000B to 111B).
cc Condition Code — Refer to Condition Codes overview in the eZ8 CPU
User Manual.
DA Direct Address Addrs Addrs. represen ts a number in the range of 0000H to
FFFFH.
ER Extended Addressing Regis-
ter Reg Reg. represents a number in the range of 000H to
FFFH.
IM Immediate Data #Data Data is a number between 00H to FFH.
Ir Indirect Working Register @Rn n = 0 –15.
IR Indirect Register @Reg Reg. represents a number in the range of 00H to
FFH.
Irr Indirect Working Register
Pair @RRp p = 0, 2, 4, 6, 8, 10, 12, or 14.
IRR Indirect Register Pair @Reg Reg. represe nts an even number in the range 00H to
FEH.
p Polarity p Polarity is a single bit binary value of either 0B or 1B.
r Working Register Rn n = 0 – 15.
R Register Reg Reg. represents a number in the range of 00H to
FFH.
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Table 126 contains additional symbols that are used throughout the Instruction Summary
and Instruction Set Description sections.
Assignment of a value is indicated by an arrow, as shown in the following example.
dst ← dst + src
This example indicates that the source data is added to the destination data; the result is
stored in the destination location.
RA Relative Addre ss X X represents an index in the range of +127 to –128
which is an offset relative to the address of the next
instruction.
rr Working Register Pair RRp p = 0, 2, 4, 6, 8, 10, 12, or 14.
RR Register Pair Reg Reg. represents an even number in the range of 00H
to FEH.
Vector Vector Address Vector Vector represents a number in the range of 00H to
FFH.
X Indexed #Index The register or register pair to be indexed is offset by
the signed Index value (#Index) in a +127 to –128
range.
Table 126. Additional Symbols
Symbol Definition
dst Destination Operand
src Source Operand
@ I nd ire ct Ad dr es s Pref ix
SP Stack Pointer
PC Program Counter
FLAGS Flags Register
RP Register Pointer
# Immediate Operand Prefix
B Binary Number Suffix
% Hexadecimal Number Prefix
H Hexadecimal Number Suffix
Table 125. Notational Shorthand (Continued)
Notation Description Operand Range
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Condition Codes
The C, Z, S and V flags control the operation of the conditional jump (JP cc and JR cc)
instructions. Sixteen frequently useful functions of the flag settings are encoded in a 4-bit
field called the condition code (cc), which forms bits 7:4 of the conditional jump instruc-
tions. The condition codes are summarized in Table 127. Some binary condition codes can
be created using more than one assembly code mnemonic . The result of the flag test oper-
ation decides if the conditional jump is executed.
Table 127. Condition Codes
Binary Hex Assembly
Mnemonic Definition Flag Test Operation
0000 0 F Always False –
0001 1 LT Less Than (S XOR V) = 1
0010 2 LE Less Than or Equal (Z OR (S XOR V)) = 1
0011 3 ULE Unsigned Less Than or Equal (C OR Z) = 1
0100 4 OV Overflow V = 1
0101 5 Ml Minus S = 1
0110 6 Z Zero Z = 1
0110 6 EQ Equal Z = 1
0111 7 C Carry C = 1
0111 7 ULT Unsigned Less Than C = 1
1000 8 T (or blank) Always True –
1001 9 GE Greater Than or Equal (S XOR V) = 0
1010 A GT Greater Than (Z OR (S XOR V)) = 0
1011 B UGT Unsigned Greater Than (C = 0 AND Z = 0) = 1
1100 C NOV No Overflow V = 0
1101 D PL Plus S = 0
1110 E NZ Non-Zero Z = 0
1110 E NE Not Equal Z = 0
1111 F NC No Carry C = 0
1111 F UGE Unsigned Greater Than or Equal C = 0
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eZ8 CPU Instruction Classes
eZ8 CPU instructions can be divided functionally into the following groups:
•
Arithmetic
•
Bit Manipulation
•
Block Transfer
•
CPU Control
•
Load
•
Logical
•
Program Control
•
Rotate and Shift
Tables 128 through 135 contain the instructions belonging to each group and the number
of operands required for each instruction. Some instructions appear in more than one
table; these instructions can be considered to be a subset of more than one category.
Within these tables, the source operand is identified as src, the destination operand is dst
and a condition code is cc.
Table 128. Arithmetic Instructions
Mnemonic Operands Instruction
ADC dst, src Add with Ca rry
ADCX dst, src Add with Carry using Extended Addressing
ADD dst, src Add
ADDX dst, src Add using Extended Addressing
CP dst, src Compare
CPC dst, src Compare with Carry
CPCX dst, src Compare with Carry using Extended Addressing
CPX dst, src Compare using Extended Addressing
DA dst Decimal Adjust
DEC dst Decrement
DECW dst Decrement Word
INC dst Increment
INCW dst Increment Word
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MULT dst Multiply
SBC dst, src Subtract with Carry
SBCX dst, src Subtract with Carry using Extended Addressing
SUB dst, src Subtract
SUBX dst, src Subtract using Extended Addressing
Table 129. Bit Manipulation Instructions
Mnemonic Operands Instruction
BCLR b it, ds t Bit Clear
BIT p, bit, dst Bit Set or Clear
BSET bit, dst Bit Set
BSWAP dst Bit Swap
CCF — Complement Carry Flag
RCF — Reset Carry Flag
SCF — Set Carry Flag
TCM dst, src Test Complement Under Mask
TCMX dst, src Test Complement Under Mask using Extended Addressing
TM dst, src Test Under Mask
TMX dst, src Test Under Mask using Extended Addressing
Table 130. Block Transfer Instructions
Mnemonic Operands Instruction
LDCI dst, src Load Constant to/from program memory and Auto-Incre-
ment addresses
LDEI dst, src Load External Data to/from Data Memory and Auto-Incre-
ment addresses
Table 128. Arithmetic Instructions (Continued)
Mnemonic Operands Instruction
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Table 131. CPU Control Instructions
Mnemonic Operands Instruction
ATM — Atomic Execution
CCF — Complement Carry Flag
DI — Disable Interrupts
EI — Enable Interrupts
HALT — HALT Mode
NOP — No Operation
RCF — Reset Carry Flag
SCF — Set Carry Flag
SRP src Set Register Pointer
STOP — STOP Mode
WDT — Watchdog Timer Refresh
Table 132. Load Instructions
Mnemonic Operands Instruction
CLR dst Clear
LD dst, src Load
LDC dst, src Load Constant to/from program memory
LDCI dst, src Load Constant to/from program memory and Auto-Incre-
ment addresses
LDE dst, src Load External Data to/from Data Memory
LDEI dst, src Load External Data to/from Data Memory and Auto-Incre-
ment addresses
LDWX dst, src Load Word using Extended Addressing
LDX dst, src Load using Extended Addressing
LEA dst, X(src) Load Effective Address
POP dst Pop
POPX dst Pop using Extended Addressing
PUSH src Push
PUSHX src Push using Extended Addressing
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Table 133. Logical Instructions
Mnemonic Operands Instruction
AND dst, src Logical AND
ANDX dst, src Logical AND using Extended Addressing
COM dst Complement
OR dst, src Logical OR
ORX dst, src Logical OR using Extended Addressing
XOR dst, src Logical Exclusive OR
XORX dst, src Logical Exclusive OR using Extended Address-
ing
Table 134. Program Control Instructions
Mnemonic Operands Instruction
BRK — On-Chip Debugger Break
BTJ p, bit, src, DA Bit Test and Jump
BTJNZ bit, src, DA Bit Test and Jump if Non-Zero
BTJZ bit, src, DA Bit Test and Jump if Zero
CALL dst Call Procedure
DJNZ dst, src, RA Decrement and Jump Non-Zero
IRET — Interrupt Return
JP dst Jump
JP cc dst Jump Conditional
JR DA Jump Relative
JR cc DA Jump Relative Conditional
RET — Return
TRAP vector Software Trap
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eZ8 CPU Instruction Summary
Table 136 summarizes the eZ8 CPU instructions. The table identifies the addressing
modes employed by the instruction, the effect upon the Flags Register , the number of CPU
clock cycles required for the instruction fetch, and the number of CPU clock cycles
required for the instruction execution.
Table 135. Rotate and Shift Instructions
Mnemonic Operands Instruction
BSWAP dst Bit Swap
RL dst Rotate Left
RLC dst Rotate Left through Carry
RR dst Rotate Right
RRC dst Rotate Right through Carry
SRA dst Shift Right Arithmetic
SRL dst Shift Right Logical
SWAP dst Swap Nibbles
Table 136. eZ8 CPU Instruction Summary
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
ADC dst, src dst ← dst + src + C r r 12 * * * * 0 * 2 3
rIr 13 2 4
RR 14 3 3
RIR 15 3 4
RIM 16 3 3
IR IM 17 3 4
ADCX dst, src dst ← dst + src + C ER ER 18 * * * * 0 * 4 3
ER IM 19 4 3
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
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ADD dst, src dst ← dst + src r r 02 * * * * 0 * 2 3
rIr 03 2 4
RR 04 3 3
RIR 05 3 4
RIM 06 3 3
IR IM 07 3 4
ADDX dst, src dst ← dst + src ER ER 08 * * * * 0 * 4 3
ER IM 09 4 3
AND dst, src dst ← dst AND src r r 5 2 – * * 0 – – 2 3
rIr 53 2 4
RR 54 3 3
RIR 55 3 4
RIM 56 3 3
IR IM 57 3 4
ANDX dst, src dst ← dst AND src ER ER 58 – * * 0 – – 4 3
ER IM 59 4 3
ATM Block all interrupt and
DMA requests during
execution of the next 3
instructions
2F –––––– 1 2
BCLR bit, dst dst[bit] ← 0 r E2 – ––––– 2 2
BIT p, bit, dst dst[bit] ← p r E2 –––––– 2 2
BRK Debugger Break 00 – – – – – – 1 1
BSET bit, dst dst[bit] ← 1 r E2 –––– –– 2 2
BSWAP dst dst[7:0] ← dst[0:7] R D5 X * * 0 – – 2 2
BTJ p, bit, src,
dst if src[bit] = p
PC ← PC + X r F6 –––––– 3 3
Ir F7 3 4
Table 136. eZ8 CPU Instruction Summary (Continued)
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
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BTJNZ bit, src,
dst if src[bit] = 1
PC ← PC + X r F6 –––––– 3 3
Ir F7 3 4
BTJZ bit, src,
dst if src[bit] = 0
PC ← PC + X r F6 –––––– 3 3
Ir F7 3 4
CALL dst SP ← SP –2
@SP ← PC
PC ← dst
IRR D4 –––––– 2 6
DA D6 3 3
CCF C ← ~C EF *––––– 1 2
CLR dst dst ← 00H R B0 –––––– 2 2
IR B1 2 3
COM dst dst ← ~dst R 60 – * * 0 – – 2 2
IR 61 2 3
CP dst, src dst – src r r A2 * * * * – – 2 3
rIr A3 2 4
RR A4 3 3
RIR A5 3 4
RIM A6 3 3
IR IM A7 3 4
CPC dst, src dst – src – C r r 1F A2 * * * * – – 3 3
rIr 1F A3 3 4
RR 1F A4 4 3
RIR 1F A5 4 4
RIM 1F A6 4 3
IR IM 1F A7 4 4
CPCX dst, src dst – src – C ER ER 1F A8 * * * * – – 5 3
ER IM 1F A9 5 3
CPX dst, src dst – src ER ER A8 * * * * – – 4 3
ER IM A9 4 3
Table 136. eZ8 CPU Instruction Summary (Continued)
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
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DA dst dst ← DA(dst) R 40 * * * X – – 2 2
IR 41 2 3
DEC dst dst ← dst – 1 R 30 – * * * – – 2 2
IR 31 2 3
DECW dst dst ← dst – 1 RR 80 – * * * – – 2 5
IRR 81 2 6
DI IRQCTL[7] ← 0 8F –––––– 1 2
DJNZ dst, RA dst ← dst – 1
if dst 0
PC ← PC + X
r 0A–FA –––––– 2 3
EI IRQCTL[7] ← 1 9F –––––– 1 2
HALT HALT Mode 7F –––––– 1 2
INC dst dst ← dst + 1 R 20 – * * * – – 2 2
IR 21 2 3
r0E–FE 12
INCW dst dst ← dst + 1 RR A0 – * * * – – 2 5
IRR A1 2 6
IRET FLAGS ← @SP
SP ← SP + 1
PC ← @SP
SP ← SP + 2
IRQCTL[7] ← 1
BF ****** 1 5
JP dst PC ← dst DA 8D –––––– 3 2
IRR C4 2 3
JP cc, dst if cc is true
PC ← dst DA 0D–FD –––––– 3 2
JR dst PC ← PC + X DA 8B –––––– 2 2
JR cc, dst if cc is true
PC ← PC + X DA 0B–FB –––––– 2 2
Table 136. eZ8 CPU Instruction Summary (Continued)
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
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LD dst, rc dst ← src r IM 0C–FC –––––– 2 2
rX(r) C7 3 3
X(r) r D7 3 4
rIr E3 2 3
RR E4 3 2
RIR E5 3 4
RIM E6 3 2
IR IM E7 3 3
Ir r F3 2 3
IR R F5 3 3
LDC dst, src dst ← src r Irr C2 –––––– 2 5
Ir Irr C5 2 9
Irr r D2 2 5
LDCI dst, src dst ← src
r ← r + 1
rr ← rr + 1
Ir Irr C3 –––––– 2 9
Irr Ir D3 2 9
LDE dst, src dst ← src r Irr 82 –––––– 2 5
Irr r 92 2 5
LDEI dst, src dst ← src
r ← r + 1
rr ← rr + 1
Ir Irr 83 –––––– 2 9
Irr Ir 93 2 9
LDWX dst, src dst ← src ER ER 1F E8 –––––– 54
Table 136. eZ8 CPU Instruction Summary (Continued)
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
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LDX dst, src dst ← src r ER 84 –––––– 3 2
Ir ER 85 3 3
RIRR 86 3 4
IR IRR 87 3 5
r X(rr) 88 3 4
X(rr) r 89 3 4
ER r 94 3 2
ER Ir 95 3 3
IRR R 96 3 4
IRR IR 97 3 5
ER ER E8 4 2
ER IM E9 4 2
LEA dst, X(src) dst ← src + X r X(r) 98 –––––– 3 3
rr X(rr) 99 3 5
MULT dst dst[15:0] ←
dst[15:8] * dst[7:0] RR F4 –––––– 2 8
NOP No operation 0F – – – – – – 1 2
OR dst, src dst ← dst OR src r r 42 – * * 0 – – 2 3
rIr 43 2 4
RR 44 3 3
RIR 45 3 4
RIM 46 3 3
IR IM 47 3 4
ORX dst, src dst ← dst OR src ER ER 48 – * * 0 – – 4 3
ER IM 49 4 3
POP dst dst ← @SP
SP ← SP + 1 R 50 –––––– 2 2
IR 51 2 3
Table 136. eZ8 CPU Instruction Summary (Continued)
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
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POPX dst dst ← @SP
SP ← SP + 1 ER D8 –––––– 3 2
PUSH src SP ← SP – 1
@SP ← src R 70 –––––– 2 2
IR 71 2 3
IM 1F 70 3 2
PUSHX src SP ← SP – 1
@SP ← src ER C8 –––––– 3 2
RCF C ← 0 CF 0––––– 1 2
RET PC ← @SP
SP ← SP + 2 AF –––––– 1 4
RL dst R 90 * * * * – – 2 2
IR 91 2 3
RLC dst R 10 * * * * – – 2 2
IR 11 2 3
RR dst R E0 ****–– 2 2
IR E1 2 3
RRC dst R C0 * * * * – – 2 2
IR C1 2 3
SBC dst, src dst ← dst – src – C r r 32 * * * * 1 * 2 3
rIr 33 2 4
RR 34 3 3
RIR 35 3 4
RIM 36 3 3
IR IM 37 3 4
SBCX dst, src dst ← dst – src – C ER ER 38 * * * * 1 * 4 3
ER IM 39 4 3
SCF C ← 1 DF 1––––– 1 2
Table 136. eZ8 CPU Instruction Summary (Continued)
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
D7 D6 D5 D4 D3 D2 D1 D0
dst
C
D7 D6 D5 D4 D3 D2 D1 D0
dst
C
D7 D6 D5 D4 D3 D2 D1 D0
dst C
D7 D6 D5 D4 D3 D2 D1 D0
dst
C
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SRA dst R D0 * * * 0 – – 2 2
IR D1 2 3
SRL dst R 1F C0 * * 0 * – – 3 2
IR 1F C1 3 3
SRP src RP ← src IM 01 –––––– 2 2
STOP STOP Mode 6F –––––– 1 2
SUB dst, src dst ← dst – src r r 22 * * * * 1 * 2 3
rIr 23 2 4
RR 24 3 3
RIR 25 3 4
RIM 26 3 3
IR IM 27 3 4
SUBX dst, src dst ← dst – src ER ER 28 * * * * 1 * 4 3
ER IM 29 4 3
SWAP dst dst[7:4] dst[3:0] R F0 X * * X – – 2 2
IR F1 2 3
TCM dst, src (NOT dst) AND src r r 62 – * * 0 – – 2 3
rIr 63 2 4
RR 64 3 3
RIR 65 3 4
RIM 66 3 3
IR IM 67 3 4
TCMX dst, src (NOT dst) AND src ER ER 68 – * * 0 – – 4 3
ER IM 69 4 3
Table 136. eZ8 CPU Instruction Summary (Continued)
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
D7 D6 D5 D4 D3 D2 D1 D0
dst
C
D7 D6 D5 D4 D3 D2 D1 D0
dst
C0
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TM dst, src dst AND src r r 72 – * * 0 – – 2 3
rIr 73 2 4
RR 74 3 3
RIR 75 3 4
RIM 76 3 3
IR IM 77 3 4
TMX dst, src dst AND src ER ER 78 – * * 0 – – 4 3
ER IM 79 4 3
TRAP Vector SP ← SP – 2
@SP ← PC
SP ← SP – 1
@SP ← FLAGS
PC ← @Vector
Vecto
rF2 –––––– 2 6
WDT 5F –––––– 1 2
XOR dst, src dst ← dst XOR src r r B2 – * * 0 – – 2 3
rIr B3 2 4
RR B4 3 3
RIR B5 3 4
RIM B6 3 3
IR IM B7 3 4
XORX dst, src dst ← dst XOR src ER ER B8 – * * 0 – – 4 3
ER IM B9 4 3
Table 136. eZ8 CPU Instruction Summary (Continued)
Assembly
Mnemonic Symbolic Operation
Address
Mode Opcode(s)
(Hex)
Flags Fetch
Cycles Instr.
Cyclesdst src C Z S V D H
Note: F lags Notation:
* = Value is a function of the result of the operation.
– = Unaffected.
X = Undefined.
0 = Reset to 0.
1 = Set to 1.
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Flags Register
The Flags Register contains the status information regarding the most recent arithmetic,
logical, bit manipulation or rotate and shift operation. The Flags Register contains six bits
of status information that are set or cleared by CPU operations. Four of the bits (C, V, Z
and S) can be tested for use with conditional jump instructions. Two flags, H and D, can-
not be tested and are used for Binary-Coded Decimal (BCD) arithmetic.
The two remaining bits, user flags F1 and F2, are available as general-purpose status bits.
User flags are unaffected by arithmetic operations and must be set or cleared by instruc-
tions. The user flags cannot be used with conditional jumps. They are undefined at initial
power-up and are unaffected by Reset. Figure 58 displays the flags and their bit positions
in the Flags Register.
Interrupts, the software trap (TRAP) instruction, and illegal instruction traps all write the
value of the Flags Register to the stack. Executing an interrupt return (IRET) instruction
restores the value saved on the stack into the Flags Register.
Note:U = Undefined.
Figure 58. Flags Register
C Z S V D H F2 F1 Flags Register
Bit
0
Bit
7
Half Carry Flag
Decimal Adjust Flag
Overflow Flag
Sign Flag
Zero Flag
Carry Flag
User Flags
PS019924-0113 PR ELIMINA R Y Op Code Maps
Z8 Encore! XP® F64xx Series
Product Specification
244
Op Code Maps
A description of the op code map data and the abbreviations are provided in Figure 59 and
Table 137. Figures 60 and 61 provide information about each of the eZ8 CPU instructions.
Figure 59. Op Code Map Cell Description
Table 137. Op Code Map Abbreviations
Abbreviation Description Abbreviation Description
b Bit position IRR Indirect register pair
cc Condition code p Polarity (0 or 1)
X 8-bit signed index or displacement r 4-bit working register
DA Destination address R 8-bit register
ER Extended addressing register r1, R1, Ir1, Irr1,
IR1, rr1, RR1,
IRR1, ER1
Destination address
CP
3.3
R2,R1
A
4
Op Code
Lower Nibble
Second Operand
After Assembly
First Operand
After Assembly
Opcode
Upper Nibble
Instruction CyclesFetch Cycles
PS019924-0113 PR ELIMINA R Y Op Code Maps
Z8 Encore! XP® F64xx Series
Product Specification
245
IM Immediate data value r2, R2, Ir2, Irr2,
IR2, rr2, RR2,
IRR2, ER2
Source address
Ir Indirect working register RA Relative
IR Indirect registe r rr Working register pair
Irr Indirect working register pair RR Register pair
Table 137. Op Code Map Abbreviations (Continued)
Abbreviation Description Abbreviation Description
PS019924-0113 PR ELIMINA R Y Op Code Maps
Z8 Encore! XP® F64xx Series
Product Specification
246
Figure 60. First Op Code Map
CP
3.3
R2,R1 CP
3.4
IR2,R1
CP
2.3
r1,r2 CP
2.4
r1,Ir2 CPX
4.3
ER2,ER1 CPX
4.3
IM,ER1
CP
3.3
R1,IM CP
3.4
IR1,IM
RRC
2.2
R1 RRC
2.3
IR1
0123456789ABCDEF
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Lower Nibble (Hex)
Upper Nibble (Hex)
BRK
1.2 SRP
2.2
IM ADD
2.3
r1,r2 ADD
2.4
r1,Ir2 ADD
3.3
R2,R1 ADD
3.4
IR2,R1 ADD
3.3
R1,IM ADD
3.4
IR1,IM ADDX
4.3
ER2,ER1 ADDX
4.3
IM,ER1 DJNZ
2.3
r1,X JR
2.2
cc,X LD
2.2
r1,IM JP
3.2
cc,DA INC
1.2
r1 NOP
1.2
RLC
2.2
R1 RLC
2.3
IR1 ADC
2.3
r1,r2 ADC
2.4
r1,Ir2 ADC
3.3
R2,R1 ADC
3.4
IR2,R1 ADC
3.3
R1,IM ADC
3.4
IR1,IM ADCX
4.3
ER2,ER1 ADCX
4.3
IM,ER1
INC
2.2
R1 INC
2.3
IR1 SUB
2.3
r1,r2 SUB
2.4
r1,Ir2 SUB
3.3
R2,R1 SUB
3.4
IR2,R1 SUB
3.3
R1,IM SUB
3.4
IR1,IM SUBX
4.3
ER2,ER1 SUBX
4.3
IM,ER1
DEC
2.2
R1 DEC
2.3
IR1 SBC
2.3
r1,r2 SBC
2.4
r1,Ir2 SBC
3.3
R2,R1 SBC
3.4
IR2,R1 SBC
3.3
R1,IM SBC
3.4
IR1,IM SBCX
4.3
ER2,ER1 SBCX
4.3
IM,ER1
DA
2.2
R1 DA
2.3
IR1 OR
2.3
r1,r2 OR
2.4
r1,Ir2 OR
3.3
R2,R1 OR
3.4
IR2,R1 OR
3.3
R1,IM OR
3.4
IR1,IM ORX
4.3
ER2,ER1 ORX
4.3
IM,ER1
POP
2.2
R1 POP
2.3
IR1 AND
2.3
r1,r2 AND
2.4
r1,Ir2 AND
3.3
R2,R1 AND
3.4
IR2,R1 AND
3.3
R1,IM AND
3.4
IR1,IM ANDX
4.3
ER2,ER1 ANDX
4.3
IM,ER1
COM
2.2
R1 COM
2.3
IR1 TCM
2.3
r1,r2 TCM
2.4
r1,Ir2 TCM
3.3
R2,R1 TCM
3.4
IR2,R1 TCM
3.3
R1,IM TCM
3.4
IR1,IM TCMX
4.3
ER2,ER1 TCMX
4.3
IM,ER1
PUSH
2.2
R2 PUSH
2.3
IR2 TM
2.3
r1,r2 TM
2.4
r1,Ir2 TM
3.3
R2,R1 TM
3.4
IR2,R1 TM
3.3
R1,IM TM
3.4
IR1,IM TMX
4.3
ER2,ER1 TMX
4.3
IM,ER1
DECW
2.5
RR1 DECW
2.6
IRR1 LDE
2.5
r1,Irr2 LDEI
2.9
Ir1,Irr2 LDX
3.2
r1,ER2 LDX
3.3
Ir1,ER2 LDX
3.4
IRR2,R1 LDX
3.5
IRR2,IR1 LDX
3.4
r1,rr2,X LDX
3.4
rr1,r2,X
RL
2.2
R1 RL
2.3
IR1 LDE
2.5
r2,Irr1 LDEI
2.9
Ir2,Irr1 LDX
3.2
r2,ER1 LDX
3.3
Ir2,ER1 LDX
3.4
R2,IRR1 LDX
3.5
IR2,IRR1 LEA
3.3
r1,r2,X LEA
3.5
rr1,rr2,X
INCW
2.5
RR1 INCW
2.6
IRR1
CLR
2.2
R1 CLR
2.3
IR1 XOR
2.3
r1,r2 XOR
2.4
r1,Ir2 XOR
3.3
R2,R1 XOR
3.4
IR2,R1 XOR
3.3
R1,IM XOR
3.4
IR1,IM XORX
4.3
ER2,ER1 XORX
4.3
IM,ER1
LDC
2.5
r1,Irr2 LDCI
2.9
Ir1,Irr2
LDC
2.5
r2,Irr1 LDCI
2.9
Ir2,Irr1
JP
2.3
IRR1 LDC
2.9
Ir1,Irr2 LD
3.4
r1,r2,X PUSHX
3.2
ER2
SRA
2.2
R1 SRA
2.3
IR1 POPX
3.2
ER1
LD
3.4
r2,r1,X
CALL
2.6
IRR1 BSWAP
2.2
R1 CALL
3.3
DA
LD
3.2
R2,R1 LD
3.3
IR2,R1
BIT
2.2
p,b,r1 LD
2.3
r1,Ir2 LDX
4.2
ER2,ER1 LDX
4.2
IM,ER1
LD
3.2
R1,IM LD
3.3
IR1,IM
RR
2.2
R1 RR
2.3
IR1
MULT
2.8
RR1 LD
3.3
R2,IR1
TRAP
2.6
Vector LD
2.3
Ir1,r2 BTJ
3.3
p,b,r1,X BTJ
3.4
p,b,Ir1,X
SWAP
2.2
R1 SWAP
2.3
IR1
RCF
1.2
WDT
1.2
STOP
1.2
HALT
1.2
DI
1.2
EI
1.2
RET
1.4
IRET
1.5
SCF
1.2
CCF
1.2
Opcode
See 2nd
Map
1,2
ATM
PS019924-0113 PR ELIMINA R Y Op Code Maps
Z8 Encore! XP® F64xx Series
Product Specification
247
Figure 61. Second Op Code Map after 1FH
CPC
4.3
R2,R1 CPC
4.4
IR2,R1
CPC
3.3
r1,r2 CPC
3.4
r1,Ir2 CPCX
5.3
ER2,ER1 CPCX
5.3
IM,ER1
CPC
4.3
R1,IM CPC
4.4
IR1,IM
SRL
3.2
R1 SRL
3.3
IR1
0 1 2 3 4 5 6 7 8 9 A B C D E F
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Lower Nibble (Hex)
Upper Nibble (Hex)
3,2
PUSH
IM
5,4
LDWX
ER2,ER1
PS019924-0113 PR E L I M I NARY General Purpose RAM
Z8 Encore! XP® F64xx Series
Product Specification
248
Appendix B. Register Tables
For the read er’s convenience, this appendix lists all F64xx Series registers numerically by
hexadecimal ad dress.
General Purpose RAM
In the F64xx Series, the 000–FFF hexadecimal address range is partitioned for general-
purpose random access memory, as follows.
Hex Addresses: 000–7FF
This address range is reserved for 2 KB general-purpose register file RAM devices. For
more details, see the Register File section on page 18.
Hex Addresses: 000–FFF
This address range is reserved for 4 KB general-purpose register file RAM devices. For
more details, see the Register File section on page 18.
Timer 0
For more information about these Timer Control registers, see the Timer Control Register
Definitions section on page 72.
Hex Address: F00
Table 138. T imer 0–3 High Byte Register (TxH)
Bit 76543210
Field TH
RESET 0
R/W R/W
Address F00H, F08H, F10H, F18H
PS019924-0113 PR E L I M I NARY Timer 0
Z8 Encore! XP® F64xx Series
Product Specification
249
Hex Address: F01
Hex Address: F02
Hex Address: F03
Hex Address: F04
Table 139. T imer 0–3 Low Byte Register (TxL)
Bit 76543210
Field TL
RESET 01
R/W R/W
Address F01H, F09H, F11H, F19H
Table 140. Timer 0–3 Reload High Byte Register (TxRH)
Bit 76543210
Field TRH
RESET 1
R/W R/W
Address F02H, F0AH, F12H, F1AH
Table 141. Ti mer 0–3 Reload Low Byte Register (TxRL)
Bit 76543210
Field TRL
RESET 1
R/W R/W
Address F03H, F0BH, F13H, F1BH
Table 142. Ti mer 0–3 PWM High Byte Register (TxPWMH)
Bit 76543210
Field PWMH
RESET 0
R/W R/W
Address F04H, F0CH, F14H, F1CH
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Z8 Encore! XP® F64xx Series
Product Specification
250
Hex Address: F05
Hex Address: F06
Hex Address: F07
Hex Address: F08
Table 143. Timer 0–3 PWM Low Byte Register (TxPWML)
Bit 76543210
Field PWML
RESET 0
R/W R/W
Address F05H, F0DH, F15H, F1DH
Table 144 . Timer 0–3 Control 0 Re gister (TxCTL0 )
Bit 76543210
Field Reserved CSC Reserved
RESET 0
R/W R/W
Address F06H, F0EH, F16H, F1EH
Table 145 . Timer 0–3 Control 1 Re gister (TxCTL1 )
Bit 76543210
Field TEN TPOL PRES TMODE
RESET 0
R/W R/W
Address F07H, F0FH, F17H, F1FH
Table 146. T imer 0–3 High Byte Register (TxH)
Bit 76543210
Field TH
RESET 0
R/W R/W
Address F00H, F08H, F10H, F18H
PS019924-0113 PR E L I M I NARY Timer 0
Z8 Encore! XP® F64xx Series
Product Specification
251
Hex Address: F09
Hex Address: F0A
Hex Address: F0B
Hex Address: F0C
Table 147. T imer 0–3 Low Byte Register (TxL)
Bit 76543210
Field TL
RESET 01
R/W R/W
Address F01H, F09H, F11H, F19H
Table 148. Timer 0–3 Reload High Byte Register (TxRH)
Bit 76543210
Field TRH
RESET 1
R/W R/W
Address F02H, F0AH, F12H, F1AH
Table 149. Ti mer 0–3 Reload Low Byte Register (TxRL)
Bit 76543210
Field TRL
RESET 1
R/W R/W
Address F03H, F0BH, F13H, F1BH
Table 150. Ti mer 0–3 PWM High Byte Register (TxPWMH)
Bit 76543210
Field PWMH
RESET 0
R/W R/W
Address F04H, F0CH, F14H, F1CH
PS019924-0113 PR E L I M I NARY Timer 0
Z8 Encore! XP® F64xx Series
Product Specification
252
Hex Address: F0D
Hex Address: F0E
Hex Address: F0F
Hex Address: F10
Table 151. Timer 0–3 PWM Low Byte Register (TxPWML)
Bit 76543210
Field PWML
RESET 0
R/W R/W
Address F05H, F0DH, F15H, F1DH
Table 152 . Timer 0–3 Control 0 Re gister (TxCTL0 )
Bit 76543210
Field Reserved CSC Reserved
RESET 0
R/W R/W
Address F06H, F0EH, F16H, F1EH
Table 153 . Timer 0–3 Control 1 Re gister (TxCTL1 )
Bit 76543210
Field TEN TPOL PRES TMODE
RESET 0
R/W R/W
Address F07H, F0FH, F17H, F1FH
Table 154. T imer 0–3 High Byte Register (TxH)
Bit 76543210
Field TH
RESET 0
R/W R/W
Address F00H, F08H, F10H, F18H
PS019924-0113 PR E L I M I NARY Timer 0
Z8 Encore! XP® F64xx Series
Product Specification
253
Hex Address: F11
Hex Address: F12
Hex Address: F13
Hex Address: F14
Table 155. T imer 0–3 Low Byte Register (TxL)
Bit 76543210
Field TL
RESET 01
R/W R/W
Address F01H, F09H, F11H, F19H
Table 156. Timer 0–3 Reload High Byte Register (TxRH)
Bit 76543210
Field TRH
RESET 1
R/W R/W
Address F02H, F0AH, F12H, F1AH
Table 157. Ti mer 0–3 Reload Low Byte Register (TxRL)
Bit 76543210
Field TRL
RESET 1
R/W R/W
Address F03H, F0BH, F13H, F1BH
Table 158. Ti mer 0–3 PWM High Byte Register (TxPWMH)
Bit 76543210
Field PWMH
RESET 0
R/W R/W
Address F04H, F0CH, F14H, F1CH
PS019924-0113 PR E L I M I NARY Timer 0
Z8 Encore! XP® F64xx Series
Product Specification
254
Hex Address: F15
Hex Address: F16
Hex Address: F17
Hex Address: F18
Table 159. Timer 0–3 PWM Low Byte Register (TxPWML)
Bit 76543210
Field PWML
RESET 0
R/W R/W
Address F05H, F0DH, F15H, F1DH
Table 160 . Timer 0–3 Control 0 Re gister (TxCTL0 )
Bit 76543210
Field Reserved CSC Reserved
RESET 0
R/W R/W
Address F06H, F0EH, F16H, F1EH
Table 161 . Timer 0–3 Control 1 Re gister (TxCTL1 )
Bit 76543210
Field TEN TPOL PRES TMODE
RESET 0
R/W R/W
Address F07H, F0FH, F17H, F1FH
Table 162. T imer 0–3 High Byte Register (TxH)
Bit 76543210
Field TH
RESET 0
R/W R/W
Address F00H, F08H, F10H, F18H
PS019924-0113 PR E L I M I NARY Timer 0
Z8 Encore! XP® F64xx Series
Product Specification
255
Hex Address: F19
Hex Address: F1A
Hex Address: F1B
Hex Address: F1C
Table 163. T imer 0–3 Low Byte Register (TxL)
Bit 76543210
Field TL
RESET 01
R/W R/W
Address F01H, F09H, F11H, F19H
Table 164. Timer 0–3 Reload High Byte Register (TxRH)
Bit 76543210
Field TRH
RESET 1
R/W R/W
Address F02H, F0AH, F12H, F1AH
Table 165. Ti mer 0–3 Reload Low Byte Register (TxRL)
Bit 76543210
Field TRL
RESET 1
R/W R/W
Address F03H, F0BH, F13H, F1BH
Table 166. Ti mer 0–3 PWM High Byte Register (TxPWMH)
Bit 76543210
Field PWMH
RESET 0
R/W R/W
Address F04H, F0CH, F14H, F1CH
PS019924-0113 PR E L I M I NARY Universal Asynchronous Receiver/
Z8 Encore! XP® F64xx Series
Product Specification
256
Hex Address: F1D
Hex Address: F1E
Hex Address: F1F
Hex Addresses: F20–F39
This address range is reserved.
Universal Asynchronous Receiver/Transmitter (UART)
For more information about these UART Control registers, see the UART Control Regis-
ter Definitions section on page 98.
Table 167. Timer 0–3 PWM Low Byte Register (TxPWML)
Bit 76543210
Field PWML
RESET 0
R/W R/W
Address F05H, F0DH, F15H, F1DH
Table 168 . Timer 0–3 Control 0 Re gister (TxCTL0 )
Bit 76543210
Field Reserved CSC Reserved
RESET 0
R/W R/W
Address F06H, F0EH, F16H, F1EH
Table 169 . Timer 0–3 Control 1 Re gister (TxCTL1 )
Bit 76543210
Field TEN TPOL PRES TMODE
RESET 0
R/W R/W
Address F07H, F0FH, F17H, F1FH
PS019924-0113 PR E L I M I NARY Universal Asynchronous Receiver/
Z8 Encore! XP® F64xx Series
Product Specification
257
Hex Address: F40
Hex Address: F41
Hex Address: F42
Table 170. UART Transmit Dat a Register (UxTXD)
Bit 76543210
Field TXD
RESET X
R/W W
Address F40H and F48H
Table 171. UART Receive Data Register (UxRXD)
Bit 76543210
Field RXD
RESET X
R/W R
Address F40H and F48H
Table 172. UART Status 0 Register (UxSTAT0)
Bit 76543210
Field RDA PE OE FE BRKD TDRE TXE CTS
RESET 01X
R/W R
Address F41H and F49H
Table 173. UART Control 0 Register (UxCTL0)
Bit 76543210
Field TEN REN CTSE PEN PSEL SBRK STOP LBEN
RESET 0
R/W R/W
Address F42H and F4AH
PS019924-0113 PR E L I M I NARY Universal Asynchronous Receiver/
Z8 Encore! XP® F64xx Series
Product Specification
258
Hex Address: F43
Hex Address: F44
Hex Address: F45
Hex Address: F46
Table 174. UART Control 1 Register (UxCTL1)
Bit 76543210
Field MPMD[1] MPEN MPMD[0] MPBT DEPOL BRGCTL RDAIRQ IREN
RESET 0
R/W R/W
Address F43H and F4BH
Table 175. UART Status 1 Register (UxSTAT1)
Bit 76543210
Field Reserved NEWFRM MPRX
RESET 0
R/W RR/WR
Address F44H and F4CH
Table 176. UART Address Compare Register (UxADDR)
Bit 76543210
Field COMP_ADDR
RESET 0
R/W R/W
Address F45H and F4DH
Table 177. UART Baud Rate High Byte Register (UxBRH)
Bit 76543210
Field BRH
RESET 1
R/W R/W
Address F46H and F4EH
PS019924-0113 PR E L I M I NARY Universal Asynchronous Receiver/
Z8 Encore! XP® F64xx Series
Product Specification
259
Hex Address: F47
Hex Address: F48
Hex Address: F49
Table 178. UART Baud Rate Low Byte Register (UxBRL)
Bit7 76543210
Field BRL
RESET 1
R/W R/W
Address F47H and F4FH
Table 179. UART Transmit Dat a Register (UxTXD)
Bit 76543210
Field TXD
RESET X
R/W W
Address F40H and F48H
Table 180. UART Receive Data Register (UxRXD)
Bit 76543210
Field RXD
RESET X
R/W R
Address F40H and F48H
Table 181. UART Status 0 Register (UxSTAT0)
Bit 76543210
Field RDA PE OE FE BRKD TDRE TXE CTS
RESET 01X
R/W R
Address F41H and F49H
PS019924-0113 PR E L I M I NARY Universal Asynchronous Receiver/
Z8 Encore! XP® F64xx Series
Product Specification
260
Hex Address: F4A
Hex Address: F4B
Hex Address: F4C
Hex Address: F4D
Table 182. UART Control 0 Register (UxCTL0)
Bit 76543210
Field TEN REN CTSE PEN PSEL SBRK STOP LBEN
RESET 0
R/W R/W
Address F42H and F4AH
Table 183. UART Control 1 Register (UxCTL1)
Bit 76543210
Field MPMD[1] MPEN MPMD[0] MPBT DEPOL BRGCTL RDAIRQ IREN
RESET 0
R/W R/W
Address F43H and F4BH
Table 184. UART Status 1 Register (UxSTAT1)
Bit 76543210
Field Reserved NEWFRM MPRX
RESET 0
R/W RR/WR
Address F44H and F4CH
Table 185. UART Address Compare Register (UxADDR)
Bit 76543210
Field COMP_ADDR
RESET 0
R/W R/W
Address F45H and F4DH
PS019924-011 3 PRELI M I N A R Y Inter-Integ ra te d Circ uit (I2C)
Z8 Encore! XP® F64xx Series
Product Specification
261
Hex Address: F4E
Hex Address: F4F
Inter-Integrated Circuit (I2C)
For more information about these I2C Control registers, see the I2C Control Register Def-
initions section on page 141.
Hex Address: F50
Table 186. UART Baud Rate High Byte Register (UxBRH)
Bit 76543210
Field BRH
RESET 1
R/W R/W
Address F46H and F4EH
Table 187. UART Baud Rate Low Byte Register (UxBRL)
Bit7 76543210
Field BRL
RESET 1
R/W R/W
Address F47H and F4FH
Table 188. I2C Data Register (I2CDATA)
Bit 76543210
Field DATA
RESET 0
R/W R/W
Address F50H
PS019924-011 3 PRELI M I N A R Y Inter-Integ ra te d Circ uit (I2C)
Z8 Encore! XP® F64xx Series
Product Specification
262
Hex Address: F51
Hex Address: F52
Hex Address: F53
Hex Address: F54
Table 189. I2C Status Register (I2C STAT)
Bit 76543210
Field TDRE RDRF ACK 10B RD TAS DSS NCKI
RESET 10
R/W R
Address F51H
Table 190. I2C Control Register (I2CCTL)
Bit 76543210
Field IEN START STOP BIRQ TXI NAK FLUSH FILTEN
RESET 0
R/W R/W R/W1 R/W1 R/W R/W R/W1 W1 R/W
Address F52H
Table 191. I2C Baud Rate High Byte Register (I2CBRH)
Bit 76543210
Field BRH
RESET FFH
R/W R/W
Address F53H
Table 192 . I2C Baud Rate Low Byte Register (I2CBRL)
Bit 76543210
Field BRL
RESET FFH
R/W R/W
Address F54H
PS019924-0113 PREL I M I N A R Y Serial Peripheral Interface
Z8 Encore! XP® F64xx Series
Product Specification
263
Hex Address: F55
Hex Address: F56
Hex Addresses: F57–F5F
This address range is reserved.
Serial Peripheral Interface
For more information about these SPI Control registers, see the SPI Control Register Def-
initions section on page 121.
Hex Address: F60
Table 193 . I2C Diagnostic State Register (I2CDST)
Bit 76543210
Field SCLIN SDAIN STPCNT TXRXSTATE
RESET X0
R/W R
Address F55H
Table 194. I2C Diagnostic Control Register (I2CDIAG)
Bit 76543210
Field Reserved DIAG
RESET 0
R/W RR/W
Address F56H
Table 195. SPI Data Register (SPIDATA)
Bit 76543210
Field DATA
RESET X
R/W R/W
Address F60H
PS019924-0113 PREL I M I N A R Y Serial Peripheral Interface
Z8 Encore! XP® F64xx Series
Product Specification
264
Hex Address: F61
Hex Address: F62
Hex Address: F63
Table 196. SPI Control Register (SPICTL)
Bit 76543210
Field IRQE STR BIRQ PHASE CLKPOL WOR MMEN SPIEN
RESET 0
R/W R/W
Address F61H
Table 197. SPI Status Register (SPISTAT)
Bit 7 6 5 4 3 2 1 0
Field IRQ OVR COL ABT Reserved TXST SLAS
RESET 01
R/W R/W* R
Address F62H
Note: R/W* = Read access. Write a 1 to clear the bit to 0.
Table 198. SPI Mode Register (SPIMODE)
Bit 76543210
Field Reserved DIAG NUMBITS[2:0] SSIO SSV
RESET 0
R/W RR/W
Address F63H
PS019924-0113 PREL I M I N A R Y Serial Peripheral Interface
Z8 Encore! XP® F64xx Series
Product Specification
265
Hex Address: F64
Hex Address: F65
This address is reserved.
Hex Address: F66
Hex Address: F67
Hex Addresses: F68–F6F
This address range is reserved.
Table 199. SPI Diagnostic State Register (SPIDST)
Bit 76543210
Field SCKEN TCKEN SPISTATE
RESET 0
R/W R
Address F64H
Table 200. SPI Baud Rate High Byte Register (SPIBRH)
Bit 76543210
Field BRH
RESET 1
R/W R/W
Address F66H
Table 201. SPI Baud Rate Low Byte Register (SPIBRL)
Bit 76543210
Field BRL
RESET 1
R/W R/W
Address F67H
PS019924-0113 PREL I M I N A RY Analog-to-Digital Converter (ADC)
Z8 Encore! XP® F64xx Series
Product Specification
266
Analog-to-Digital Converter (ADC)
For more information about these ADC Control registers, see the ADC Control Register
Definitions section on page 165.
Hex Addresses: F70–F71
This address range is reserved.
Hex Address: F72
Hex Address: F73
Hex Addresses: F74–FAF
This address range is reserved.
Direct Memory Access (DMA)
For more information about these DMA Control registers, see the DMA Control Register
Definitions section on page 152.
Table 202. ADC Data High Byte Register (ADCD_H)
Bit 76543210
Field ADCD_H
RESET X
R/W R
Address F72H
Table 203. ADC Data Low Bits Register (ADCD_L)
Bit 76543210
Field ADCD_L Reserved
RESET X
R/W R
Address F73H
PS019924-0113 PR E L I M I NARY Direct Memory Access (DMA)
Z8 Encore! XP® F64xx Series
Product Specification
267
Hex Address: FB0
Hex Address: FB1
Hex Address: FB2
Hex Address: FB3
Table 204. DMAx Control Register (DMAxCTL)
Bit 76543210
Field DEN DLE DDIR IRQEN WSEL RSS
RESET 0
R/W R/W
Address FB0H, FB8H
Table 205 . DMA x I/O Address Register (DMAxIO)
Bit 76543210
Field DMA_IO
RESET X
R/W R/W
Address FB1H, FB9H
Table 206. DMAx Address High Nibble Register (DMA xH)
Bit 76543210
Field DMA_END_H DMA_START_H
RESET X
R/W R/W
Address FB2H, FBAH
Table 207. DMAx Start/Current Addr ess Low Byte Register (DMAxSTART)
Bit 76543210
Field DMA_START
RESET X
R/W R/W
Address FB3H, FBBH
PS019924-0113 PR E L I M I NARY Direct Memory Access (DMA)
Z8 Encore! XP® F64xx Series
Product Specification
268
Hex Address: FB4
Hex Addresses: FB5–FB7
This address range is reserved.
Hex Address: FB8
Hex Address: FB9
Table 208. DMAx End Address Low Byte Register (DMAxEND)
Bit 76543210
Field DMA_END
RESET X
R/W R/W
Address FB4H, FBCH
Table 209. DMAx Control Register (DMAxCTL)
Bit 76543210
Field DEN DLE DDIR IRQEN WSEL RSS
RESET 0
R/W R/W
Address FB0H, FB8H
Table 210 . DMA x I/O Address Register (DMAxIO)
Bit 76543210
Field DMA_IO
RESET X
R/W R/W
Address FB1H, FB9H
PS019924-0113 PR E L I M I NARY Direct Memory Access (DMA)
Z8 Encore! XP® F64xx Series
Product Specification
269
Hex Address: FBA
Hex Address: FBB
Hex Address: FBC
Hex Address: FBD
Table 211. DMAx Address High Nibble Register (DMAxH)
Bit 76543210
Field DMA_END_H DMA_START_H
RESET X
R/W R/W
Address FB2H, FBAH
Table 212. DMAx Start/Current Addr ess Low Byte Register (DMAxSTART)
Bit 76543210
Field DMA_START
RESET X
R/W R/W
Address FB3H, FBBH
Table 213. DMAx End Address Low Byte Register (DMAxEND)
Bit 76543210
Field DMA_END
RESET X
R/W R/W
Address FB4H, FBCH
Table 214. DMA_ADC Address Register (DMAA_ADDR)
Bit 76543210
Field DMAA_ADDR Reserved
RESET X
R/W R/W
Address FBDH
PS019924-0113 PR E L I M INARY Interrupt Request (IRQ)
Z8 Encore! XP® F64xx Series
Product Specification
270
Hex Address: FBE
Hex Address: FBF
Interrupt Request (IRQ)
For more information about these IRQ Control registers, see the Interrupt Control Register
Definitions section on page 51.
Hex Address: FC0
Table 215. DMA_ADC Control Register (DMAACTL)
Bit 76543210
Field DAEN IRQEN Reserved ADC_IN
RESET 0
R/W R/W
Address FBEH
Table 216. DMA_ADC Status Register (DMAA_STAT)
Bit 76543210
Field CADC[3:0] Reserved IRQA IRQ1 IRQ0
RESET 0
R/W R
Address FBFH
Table 217. Interrupt Request 0 Register (IRQ0)
Bit 76543210
Field T2I T1I T0I U0RXI U0TXI I2CI SPII ADCI
RESET 0
R/W R/W
Address FC0H
PS019924-0113 PR E L I M INARY Interrupt Request (IRQ)
Z8 Encore! XP® F64xx Series
Product Specification
271
Hex Address: FC1
Hex Address: FC2
Hex Address: FC3
Hex Address: FC4
Table 218. IRQ0 Enable High Bit Register (IRQ0ENH)
Bit 76543210
Field T2ENH T1ENH T0ENH U0RENH U0TENH I2CENH SPIENH ADCENH
RESET 0
R/W R/W
Address FC1H
Table 219. IRQ0 Enable Low Bit Register (IRQ0ENL)
Bit 76543210
Field T2ENL T1ENL T0ENL U0RENL U0TENL I2CENL SPIENL ADCENL
RESET 0
R/W R/W
Address FC2H
Table 220. Interrupt Request 1 Register (IRQ1)
Bit 76543210
Field PAD7I PAD6I PAD5I PAD4I PAD3I PAD2I PAD1I PAD0I
RESET 0
R/W R/W
Address FC3H
Table 221. IRQ1 Enable High Bit Register (IRQ1ENH)
Bit 76543210
Field PAD7ENH PAD6ENH PAD5ENH PAD4ENH PAD3ENH PAD2ENH PAD1ENH PAD0ENH
RESET 00000000
R/W R/WR/WR/WR/WR/WR/WR/WR/W
Address FC4H
PS019924-0113 PR E L I M INARY Interrupt Request (IRQ)
Z8 Encore! XP® F64xx Series
Product Specification
272
Hex Address: FC5
Hex Address: FC6
Hex Address: FC7
Hex Address: FC8
Table 222. IRQ1 Enable Low Bit Register (IRQ1ENL)
Bit 76543210
Field PAD7ENL PAD6ENL PAD5ENL PAD4ENL PAD3ENL PAD2ENL PAD1ENL PAD0ENL
RESET 00000000
R/W R/WR/WR/WR/WR/WR/WR/WR/W
Address FC5H
Table 223. Interrupt Request 2 Register (IRQ2)
Bit 76543210
Field T3I U1RXI U1TXI DMAI PC3I PC2I PC1I PC0I
RESET 0
R/W R/W
Address FC6H
Table 224. IRQ2 Enable High Bit Register (IRQ2ENH)
Bit 76543210
Field T3ENH U1RENH U1TENH DMAENH C3ENH C2ENH C1ENH C0ENH
RESET 0
R/W R/W
Address FC7H
Table 225. IRQ2 Enable Low Bit Register (IRQ2ENL)
Bit 76543210
Field T3ENL U1RENL U1TENL DMAENL C3ENL C2ENL C1ENL C0ENL
RESET 0
R/W R/W
Address FC8H
PS019924-0113 PR E L I M INARY Interrupt Request (IRQ)
Z8 Encore! XP® F64xx Series
Product Specification
273
Hex Addresses: FC9–FCC
This address range is reserved.
Hex Address: FCD
Hex Address: FCE
Hex Address: FCF
Table 226. Interrupt Edge Select Register (IRQES)
Bit 76543210
Field IES7 IES6 IES5 IES4 IES3 IES2 IES1 IES0
RESET 0
R/W R/W
Address FCDH
Table 227. Interrupt Port Select Register (IRQPS)
Bit 76543210
Field PAD7S PAD6S PAD5S PAD4S PAD3S PAD2S PAD1S PAD0S
RESET 0
R/W R/W
Address FCEH
Table 228. Interrupt Control Register (IRQCTL)
Bit 76543210
Field IRQE Reserved
RESET 0
R/W R/W R
Address FCFH
PS019924-0113 PR E L I M I NARY General-Purpose Input/Output (GPIO)
Z8 Encore! XP® F64xx Series
Product Specification
274
General-Purpose Input/Output (GPIO)
For more information about these GPIO Control registers, see the GPIO Control Register
Definitions section on page 39.
Hex Address: FD0
Hex Address: FD1
Hex Address: FD2
Table 229. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Table 23 0. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Table 231. Port A–H Input Data Registers (PxIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
PS019924-0113 PR E L I M I NARY General-Purpose Input/Output (GPIO)
Z8 Encore! XP® F64xx Series
Product Specification
275
Hex Address: FD3
Hex Address: FD4
Hex Address: FD5
Hex Address: FD6
Table 232. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Table 233. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Table 23 4. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Table 235. Port A–H Input Data Registers (PxIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
PS019924-0113 PR E L I M I NARY General-Purpose Input/Output (GPIO)
Z8 Encore! XP® F64xx Series
Product Specification
276
Hex Address: FD7
Hex Address: FD8
Hex Address: FD9
Hex Address: FDA
Table 236. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Table 237. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Table 23 8. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Table 239. Port A–H Input Data Registers (PxIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
PS019924-0113 PR E L I M I NARY General-Purpose Input/Output (GPIO)
Z8 Encore! XP® F64xx Series
Product Specification
277
Hex Address: FDB
Hex Address: FDC
Hex Address: FDD
Hex Address: FDE
Table 240. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Table 241. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Table 24 2. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Table 243. Port A–H Input Data Registers (PxIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
PS019924-0113 PR E L I M I NARY General-Purpose Input/Output (GPIO)
Z8 Encore! XP® F64xx Series
Product Specification
278
Hex Address: FDF
Hex Address: FE0
Hex Address: FE1
Hex Address: FE2
Table 244. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Table 245. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Table 24 6. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Table 247. Port A–H Input Data Registers (PxIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
PS019924-0113 PR E L I M I NARY General-Purpose Input/Output (GPIO)
Z8 Encore! XP® F64xx Series
Product Specification
279
Hex Address: FE3
Hex Address: FE4
Hex Address: FE5
Hex Address: FE6
Table 248. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Table 249. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Table 25 0. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Table 251. Port A–H Input Data Registers (PxIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
PS019924-0113 PR E L I M I NARY General-Purpose Input/Output (GPIO)
Z8 Encore! XP® F64xx Series
Product Specification
280
Hex Address: FE7
Hex Address: FE8
Hex Address: FE9
Hex Address: FEA
Table 252. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Table 253. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Table 25 4. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Table 255. Port A–H Input Data Registers (PxIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
PS019924-0113 PR E L I M I NARY General-Purpose Input/Output (GPIO)
Z8 Encore! XP® F64xx Series
Product Specification
281
Hex Address: FEB
Hex Address: FEC
Hex Address: FED
Hex Address: FEE
Table 256. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Table 257. Port A–H GPIO Address Registers (PxADDR)
Bit 76543210
Field PADDR[7:0]
RESET 00H
R/W R/W
Address FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
Table 25 8. Port A–H Control Registers (PxCTL)
Bit 76543210
Field PCTL
RESET 00H
R/W R/W
Address FD1H, FD5H, FD9H, FDDH, FE1H, FE5H, FE9H, FEDH
Table 259. Port A–H Input Data Registers (PxIN)
Bit 76543210
Field PIN7 PIN6 PIN5 PIN4 PIN3 PIN2 PIN1 PIN0
RESET X
R/W R
Address FD2H, FD6H, FDAH, FDEH, FE2H, FE6H, FEAH, FEEH
PS019924-0113 PR E L I MINARY Watchdog Timer
Z8 Encore! XP® F64xx Series
Product Specification
282
Hex Address: FEF
Watchdog Timer
For more information about these Watchdog Timer Control registers, see the Watchdog
Timer Control Register Definitions section on page 83.
Hex Address: FF0
Hex Address: FF1
Table 260. Port A–H Output Data Register (PxOUT)
Bit 76543210
Field POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
RESET 0
R/W R/W
Address FD3H, FD7H, FDBH, FDFH, FE3H, FE7H, FEBH, FEFH
Table 261. Watchdog Timer Control Register (WDTCTL)
Bit 76543210
Field POR STOP WDT EXT Reserved SM
RESET See Table 48 on page 84. 0
R/W R
Address FF0H
Table 262. Watchdog Timer Reload Upper Byte Register (WDTU)
Bit 76543210
Field WDTU
RESET 1
R/W R/W*
Address FF1H
Note: *R/W = Read returns the current WDT count value; write sets the appropriate reload value.
PS019924-0113 PR E L I MINARY Watchdog Timer
Z8 Encore! XP® F64xx Series
Product Specification
283
Hex Address: FF2
Hex Address: FF3
Hex Addresses: FF4–FF7
This address range is reserved.
Table 263. Watchdog Timer Reload High Byte Register (WDTH)
Bit 76543210
Field WDTH
RESET 1
R/W R/W*
Address FF2H
Note: *R/W = Read returns the current WDT count value; write sets the appropriate reload value.
Table 264. Watchdog Timer Reload Low Byte Register (WDTL)
Bit 76543210
Field WDTL
RESET 1
R/W R/W*
Address FF3H
Note: *R/W = Read returns the current WDT count value; write sets the appropriate reload value.
PS019924-0113 PRELIMINA R Y Flash
Z8 Encore! XP® F64xx Series
Product Specification
284
Flash
For more information about these Flash Control registers, see the Flash Control Register
Definitions section on page 175.
Hex Address: FF8
Hex Address: FF9
Table 265. Flash Control Register (FCTL)
Bit 76543210
Field FCMD
RESET 0
R/W W
Address FF8H
Table 266. Flash Status Register (FSTAT)
Bit 76543210
Field Reserved FSTAT
RESET 0
R/W R
Address FF8H
Table 267. Page Sel ec t Re gi st er (FPS)
Bit 76543210
Field INFO_EN PAGE
RESET 0
R/W R/W
Address FF9H
PS019924-0113 PRELIMINA R Y Flash
Z8 Encore! XP® F64xx Series
Product Specification
285
Hex Address: FFA
Hex Address: FFB
Hex Addresses: FFC–FFF
Refer to the eZ8 CPU Core User Manual (UM0128)
Table 268. Flash Sector Protect Register (FPROT)
Bit 76543210
Field SECT7 SECT6 SECT5 SECT4 SECT3 SECT2 SECT1 SECT0
RESET 0
R/W R/W*
Address FF9H
Note: *R/W = This register is accessible for read operations; it can be written to 1 only via user code.
Table 269. Flash Frequency High Byte Register (FFREQH)
Bit 76543210
Field FFREQH
RESET 0
R/W R/W
Address FFAH
Table 270. Flash Frequency Low Byte Register (FFREQL)
Bit 76543210
Field FFREQL
RESET 0
R/W R/W
Address FFBH
PS019924-0113 PREL I M I NA RY Packaging
Z8 Encore! XP® F64xx Series
Product Specification
286
Packaging
Zilog’s F6 4xx Series of MCUs includes the Z8F1621, Z8F2421, Z8F3 221, Z8F4821 and
Z8F6421 devices, which are available in the following packages:
•
40-pin Pin Dual Inline Package (PDIP)
•
44-pin Low Profile Quad Flat Package (LQFP)
•
44-pin Plastic Lead Chip Carrier (PLCC)
Zilog’s F64xx Series of MCUs also includes the Z8F1622, Z8F2422, Z8F3222, Z8F4822
and Z8F6422 devices, which are available in the following packages:
•
64-pin Low-Profile Quad Flat Package (LQFP)
•
68-pin Plastic Lead Chip Carrier (PLCC)
Lastly, Zilog’s F64xx Series of MCUs includes the Z8F48 23 and Z8F6423 devi ces, which
are available in the following package:
•
80-pin Quad Flat Package (QFP)
Current diagrams for each of these packages are published in Zilog’s Packaging Product
Specification (PS0072), which is available free for download from the Zilog website.
PS019924-0113 PR E L I M I NARY Ordering Information
Z8 Encore! XP® F64xx Series
Product Specification
287
Ordering Information
Order your F64xx Series produ cts from Zilo g using the part numbers shown in Table 271.
For more information about ordering, please consult your local Zilog sales office. The
Sales Location page on the Zilog website lists all regional offices.
Table 271. Z8 Encore! XP F64xx Series Ordering Matrix
Part Number Flash RAM
I/O Lines
Interrupts
16-Bit Timers w/PWM
10-Bit A/D Channels
I2C SPI
UARTs with IrDA
Description
Z8F642x with 64 KB Flash, 10-Bit Analog-to-Digital Converter
Standard Temperature: 0°C to 70°C
Z8F6421PM020SG 64 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F6421AN0 20 SG 64 KB 4 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F6421VN020SG 64 KB 4 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F6422AR0 20 SG 64 KB 4 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F6422VS020SG 64 KB 4 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Z8F6423FT020SG 64 KB 4 KB 60 24 4 12 1 1 2 QFP 80-pin package
Extended Temperature: –40°C to +105°C
Z8F6421PM020EG 64 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F6421AN0 20 EG 64 KB 4 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F6421VN020EG 64 KB 4 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F6422AR0 20 EG 64 KB 4 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F6422VS020EG 64 KB 4 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Z8F6423FT020EG 64 KB 4 KB 60 24 4 12 1 1 2 QFP 80-pin package
Automotive/Industrial Temperature: –40°C to +125°C
Z8F6421PM020AG 64 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F6421AN0 20 AG 64 KB 4 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F6421VN020AG 64 KB 4 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F6422AR0 20 AG 64 KB 4 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F6422VS020AG 64 KB 4 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Z8F6423FT020AG 64 KB 4 KB 60 24 4 12 1 1 2 QFP 80-pin package
PS019924-0113 PR E L I M I NARY Ordering Information
Z8 Encore! XP® F64xx Series
Product Specification
288
Z8F482x with 48 KB Flash, 10-Bit Analog-to-Digital Converter
Standard Temperature: 0°C to 70°C
Z8F4821PM020SG 48 KB 4 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F4821AN0 20 SG 48 KB 4 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F4821VN020SG 48 KB 4 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F4822AR0 20 SG 48 KB 4 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F4822VS020SG 48 KB 4 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Z8F4823FT020SG 48 KB 4 KB 60 24 4 12 1 1 2 QFP 80-pin package
Extended Temperature: –40°C to +105°C
Z8F4821PM020EG 48 KB 4 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F4821AN0 20 EG 48 KB 4 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F4821VN020EG 48 KB 4 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F4822AR0 20 EG 48 KB 4 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F4822VS020EG 48 KB 4 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Z8F4823FT020EG 48 KB 4 KB 60 24 4 12 1 1 2 QFP 80-pin package
Automotive/Industrial Temperature: –40°C to +125°C
Z8F4821PM020AG 48 KB 4 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F4821AN0 20 AG 48 KB 4 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F4821VN020AG 48 KB 4 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F4822AR0 20 AG 48 KB 4 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F4822VS020AG 48 KB 4 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Z8F4823FT020AG 48 KB 4 KB 60 24 4 12 1 1 2 QFP 80-pin package
Table 271. Z8 Encore! XP F64xx Series Ordering Matrix
Part Number Flash RAM
I/O Lines
Interrupts
16-Bit Timers w/PWM
10-Bit A/D Channels
I2C SPI
UARTs with IrDA
Description
PS019924-0113 PR E L I M I NARY Ordering Information
Z8 Encore! XP® F64xx Series
Product Specification
289
Z8F322x with 32 KB Flash, 10-Bit Analog-to-Digital Converter
Standard Temperature: 0°C to 70°C
Z8F3221PM020SG 32 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F3221AN0 20 SG 32 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F3221VN020SG 32 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F3222AR0 20 SG 32 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F3222VS020SG 32 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Extended Temperature: –40°C to 105°C
Z8F3221PM020EG 32 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F3221AN0 20 EG 32 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F3221VN020EG 32 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F3222AR0 20 EG 32 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F3222VS020EG 32 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Automotive/Industrial Temperature: –40°C to 125°C
Z8F3221PM020AG 32 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F3221AN0 20 AG 32 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F3221VN020AG 32 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F3222AR0 20 AG 32 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F3222VS020AG 32 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Table 271. Z8 Encore! XP F64xx Series Ordering Matrix
Part Number Flash RAM
I/O Lines
Interrupts
16-Bit Timers w/PWM
10-Bit A/D Channels
I2C SPI
UARTs with IrDA
Description
PS019924-0113 PR E L I M I NARY Ordering Information
Z8 Encore! XP® F64xx Series
Product Specification
290
Z8F242x with 24 KB Flash, 10-Bit Analog-to-Digital Converter
Standard Temperature: 0°C to 70°C
Z8F2421PM020SG 24 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F2421AN0 20 SG 24 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F2421VN020SG 24 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F2422AR0 20 SG 24 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F2422VS020SG 24 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Extended Temperature: –40°C to 105°C
Z8F2421PM020EG 24 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F2421AN0 20 EG 24 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F2421VN020EG 24 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F2422AR0 20 EG 24 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F2422VS020EG 24 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Automotive/Industrial Temperature: –40°C to 125°C
Z8F2421PM020AG 24 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F2421AN0 20 AG 24 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F2421VN020AG 24 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F2422AR0 20 AG 24 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F2422VS020AG 24 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Table 271. Z8 Encore! XP F64xx Series Ordering Matrix
Part Number Flash RAM
I/O Lines
Interrupts
16-Bit Timers w/PWM
10-Bit A/D Channels
I2C SPI
UARTs with IrDA
Description
PS019924-0113 PR E L I M I NARY Ordering Information
Z8 Encore! XP® F64xx Series
Product Specification
291
Z8F162x with 16 KB Flash, 10-Bit Analog-to-Digital Converter
Standard Temperature: 0°C to 70°C
Z8F1621PM020SG 16 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F1621AN0 20 SG 16 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F1621VN020SG 16 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F1622AR0 20 SG 16 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F1622VS020SG 16 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Extended Temperature: –40°C to +105°C
Z8F1621PM020EG 16 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F1621AN0 20 EG 16 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F1621VN020EG 16 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F1622AR0 20 EG 16 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F1622VS020EG 16 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Automotive/Industrial Temperature: –40°C to +125°C
Z8F1621PM020AG 16 KB 2 KB 29 23 3 8 1 1 2 PDIP 40-pin package
Z8F1621AN0 20 AG 16 KB 2 KB 31 23 3 8 1 1 2 LQF P 44 -p in package
Z8F1621VN020AG 16 KB 2 KB 31 23 3 8 1 1 2 PLCC 44-pin package
Z8F1622AR0 20 AG 16 KB 2 KB 46 24 4 12 1 1 2 LQFP 64-pin package
Z8F1622VS020AG 16 KB 2 KB 46 24 4 12 1 1 2 PLCC 68-pin package
Z8F64200100KITG Development Kit
ZUSBSC00100ZACG USB Smart Cable
Accessory Kit
ZUSBOPTSC01ZACG Opto-Isolated USB Smart
Cable Accessory Kit
ZENETSC0100ZACG Ethernet Smart Cable
Accessory Kit
Table 271. Z8 Encore! XP F64xx Series Ordering Matrix
Part Number Flash RAM
I/O Lines
Interrupts
16-Bit Timers w/PWM
10-Bit A/D Channels
I2C SPI
UARTs with IrDA
Description
PS019924-0113 PREL I M I N A RY Part Number Suffix Designations
Z8 Encore! XP® F64xx Series
Product Specification
292
Part Number Suffix Designations
Zilog part numbers consist of a number of component. In the following example, part num-
ber Z8F6421AN020SG is an 8-bit Flash MCU with 4 KB of program memory in a 44-pin
LQFP package, operating with a maximum 20 MHz external clock frequency over a 0ºC to
+70ºC temperature range and built using environmentally friendly (lead-free) solder.
Z8 F 64 21 A N 020 S C
Environmental Flow
G = Lead Free Package
Temperature Range (°C)
S = Standard, 0 to 70
E = Extended, –40 to +105
A = Automotive/Industrial, –40 to +125
Speed
020 = 20 MHz
Pin Count
M = 40 pins, N = 44 pins, R = 64 pins, S = 68
pins, T = 80 pins
Package
A = LQFP
F = QFP
P = PDIP
V = PLCC
Device Type
21 = Devices with 29 or 31 I/O lines, 23 inter-
rupts, 3 timers and 8 ADC channe ls
22 = Devices with 46 I/O Lines, 24 interrupt s,
4 Timers and 12 ADC channels
23 = Devices with 60 I/O Lines, 24 interrupt s,
4 Timers and 12 ADC channels
Memory Size
64 KB Flash, 4 KB RAM
48 KB Flash, 4 KB RAM
32 KB Flash, 2 KB RAM
24 KB Flash, 2 KB RAM
16 KB Flash, 2 KB RAM
Memory Type
F = Flash
Device Family
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
293
Index
Numerics
10-bit ADC 5
A
absolute maximum ratings 201
AC characteristics 217
ADC 231
architecture 162
automatic power-dow n 164
block diagram 163
continuous conver sion 165
control register 166
control register definitions 166
data high byte register 168
data low bits register 169
DMA control 166
electrical characteristics and timing 215
operation 164
single-shot conversion 164
ADCCTL register 166
ADCDH register 168
ADCDL register 169
ADCX 231
ADD 231
add - extended addressing 231
add with carry 231
add with carry - extended addressing 231
additional symbols 229
address space 19
ADDX 231
analog signals 16
analog-to-digital c onverter (ADC) 162
AND 234
ANDX 234
arithmetic instructions 231
assembly language programming 226
assembly language syntax 227
B
baud rate generator, UART 99
BCLR 232
binary number suffix 229
BIT 232
bit 228
clear 232
manipulation instructions 232
set 232
set or clear 232
swap 232
test and jump 234
test and jump if non-zero 234
test and jump if zero 234
bit jump and test if non-zero 234
bit swap 235
block diagram 4
block transfer instructions 232
BRK 234
BSET 232
BSWAP 232, 235
BTJ 234
BTJNZ 234
BTJZ 234
C
CALL procedure 234
capture mode 79
capture/compare mode 79
cc 228
CCF 233
characteristics, electrical 201
clear 233
clock phase (SPI) 117
CLR 233
COM 234
compare 79
compare - extended addressing 231
compare mode 79
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
294
compare with carry 231
compare with carry - extended addressing 231
complement 234
complement carry flag 232, 233
condition code 228
continuous conver sion (ADC) 165
continuous mode 79
control register definition, UART 99
control register, I2C 145
counter modes 79
CP 231
CPC 231
CPCX 231
CPU and peripheral overview 4
CPU control instructions 233
CPX 231
Customer Feedback Form 305
customer feedback form 294
Customer Information 305
D
DA 228, 231
data register, I2C 142
DC characteristics 203
debugger, on-chip 184
DEC 231
decimal adjust 231
decrement 231
decrement and jump non-zero 234
decrement word 231
DECW 231
destination oper and 229
device, port availability 37
DI 233
direct address 228
direct memory access controller 151
disable interrupts 233
DJNZ 234
DMA
address high nibble register 156
configuring DMA0-1 data transfer 151
configuring for DMA_ADC data transfer 153
control of ADC 166
control register 154
control register definitions 153
controller 6
DMA_ADC address register 158
DMA_ADC control register 159
DMA_ADC operation 152
end address low byte register 157
I/O address register 155
operation 151
start/current address low byte register 157
status register 160
DMAA_STAT register 160
DMAACTL register 159
DMAxCTL register 154, 268, 269
DMAxEND register 157, 269, 270
DMAxH register 156, 268, 270
DMAxI/O address (DMAxIO) 155, 268, 269
DMAxIO register 155, 268, 269
DMAxSTART register 157, 268, 270
dst 229
E
EI 233
electrical characteristics 201
ADC 215
flash memory and timing 214
GPIO input data sample timing 218
watch-dog timer 214
enable interrupt 233
ER 228
extended addressing register 228
external pin reset 33
external RC oscillator 21 3
eZ8 CPU features 4
eZ8 CPU instruction classes 231
eZ8 CPU instruction notation 228
eZ8 CPU instruction set 226
eZ8 CPU instruction summary 235
F
FCTL register 177, 285
features, Z8 Encore! 1
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
295
first opcode map 247
FLAGS 229
flags register 229
flash
controller 5
option bit address space 181
option bit configuration - reset 181
program memory address 0001H 183
flash memory
arrangement 171
byte programming 174
code protection 173
configurations 170
control register definitions 176
controller bypass 175
electrical characteristics and timing 214
flash control register 177, 285
flash status register 178
frequency high and low byte registers 180
mass erase 175
operation 172
operation timing 172
page erase 175
page select register 178
FPS register 178
FSTAT register 178
G
gated mode 79
general-purpose I/O 37
GPIO 5, 37
alternate functions 38
architecture 38
control register definitions 40
input data sample timing 218
interrupts 40
port A-H address registers 41
port A-H alternate function sub-registers 43
port A-H control registers 42
port A-H data direction sub -registers 42
port A-H high drive enable sub-registers 45
port A-H input data registers 47
port A-H output control su b-registers 44
port A-H output data registers 47
port A-H Stop Mode Recovery sub-regist ers 46
port availability by device 37
port input timing 218
port output timing 219
H
H 229
HALT 233
halt mode 36, 233
hexadecimal number prefix/suffix 229
I
I2C 5
10-bit address read transaction 140
10-bit address transaction 137
10-bit addressed slave data transfer format 137
10-bit receive data format 140
7-bit address transaction 134
7-bit address, reading a transaction 139
7-bit addressed slave data transfer format 134,
135, 136
7-bit receive data transfer format 139
baud high and low byte registers 146, 148, 150
C status register 143, 263
control register definitions 142
controller 129
controller signals 15
interrupts 131
operation 130
SDA and SCL signals 131
stop and start conditions 133
I2CBRH register 147, 148, 150, 263, 264
I2CBRL register 147, 263
I2CCTL register 145, 263
I2CDATA register 143, 262
I2CSTAT register 143, 263
IM 228
immediate data 228
immediate operand prefix 229
INC 231
increment 231
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
296
increment word 231
INCW 231
indexed 229
indirect address prefix 229
indirect register 228
indirect register pair 228
indirect working register 228
indirect working register pair 228
infrared encoder/decoder (IrDA) 110
instruction set, ez8 CPU 226
instructions
ADC 231
ADCX 231
ADD 231
ADDX 231
AND 234
ANDX 234
arithmetic 231
BCLR 232
BIT 232
bit manipulation 232
block transfer 232
BRK 234
BSET 232
BSWAP 232, 235
BTJ 234
BTJNZ 234
BTJZ 234
CALL 234
CCF 232, 233
CLR 233
COM 234
CP 231
CPC 231
CPCX 231
CPU control 233
CPX 231
DA 231
DEC 231
DECW 231
DI 233
DJNZ 234
EI 233
HALT 233
INC 231
INCW 231
IRET 234
JP 234
LD 233
LDC 233
LDCI 232, 233
LDE 233
LDEI 232
LDX 233
LEA 233
load 233
logical 234
MULT 232
NOP 233
OR 234
ORX 234
POP 233
POPX 233
program control 234
PUSH 233
PUSHX 233
RCF 232, 233
RET 234
RL 235
RLC 235
rotate and shift 235
RR 235
RRC 235
SBC 232
SCF 232, 233
SRA 235
SRL 235
SRP 233
STOP 233
SUB 232
SUBX 232
SWAP 235
TCM 232
TCMX 232
TM 232
TMX 232
TRAP 234
watch-dog timer refresh 233
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
297
XOR 234
XORX 234
instructions, eZ8 classes of 231
interrupt control register 62
interrupt controller 6, 48
architecture 48
interrupt assertion types 51
interrupt vectors and priority 51
operation 50
register definitions 52
software interrupt assertion 52
interrupt edge select register 61
interrupt port select register 61
interrupt request 0 register 52
interrupt request 1 register 54
interrupt request 2 register 55
interrupt return 234
interrupt vector listing 48
interrupts
not acknowledge 131
receive 131
SPI 121
transmit 131
UART 97
introduction 1
IR 228
Ir 228
IrDA
architecture 110
block diagram 110
control register definitions 113
operation 110
receiving data 112
transmitting data 111
IRET 234
IRQ0 enable high and low bit registers 56
IRQ1 enable high and low bit registers 57
IRQ2 enable high and low bit registers 59
IRR 228
Irr 228
J
JP 234
jump, conditional, relative, and relative conditional
234
L
LD 233
LDC 233
LDCI 232, 233
LDE 233
LDEI 232, 233
LDX 233
LEA 233
load 233
load constant 232
load constant to/from program memory 233
load constant with auto-increment addre sses 233
load effective ad dre s s 233
load external data 233
load external data to/from data memory and auto-
increment addresses 232
load external to/from data memory and auto-incre-
ment addresses 233
load instructions 233
load using extended addressing 233
logical AND 234
logical AND/extended addressing 234
logical exclusive OR 234
logical exclusive OR/extended addressing 234
logical instructions 234
logical OR 234
logical OR/extended addressing 234
low power modes 35
M
master interrupt enable 50
master-in, slave-out and-in 116
memory
program 20
MISO 116
mode
capture 79
capture/compare 79
continuous 79
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
298
counter 79
gated 79
one-shot 79
PWM 79
modes 79
MULT 232
multiply 232
multiprocessor mode, UART 94
N
NOP (no operation) 233
not acknowledge interru pt 131
notation
b 228
cc 228
DA 228
ER 228
IM 228
IR 228
Ir 228
IRR 228
Irr 228
p 228
R 228
r 228
RA 229
RR 229
rr 229
vector 229
X 229
notational shorthand 228
O
OCD
architecture 184
auto-baud detector/generator 187
baud rate limits 187
block diagram 184
breakpoints 188
commands 189
control register 194
data format 187
DBG pin to RS-232 Interface 185
debug mode 186
debugger break 234
interface 185
serial errors 188
status register 195
timing 220
OCD commands
execute instruction (12H) 193
read data memory (0DH) 193
read OCD control register (05H) 191
read OCD revision (00H) 190
read OCD status register (02H) 191
read program counter (07H) 191
read program memory (0BH) 192
read program memory CRC (0EH) 193
read register (09H) 192
step instruction (10H) 193
stuff instruction (11H) 193
write data memory (0CH) 192
write OCD control register (04H) 191
write program counter (06H) 191
write program memory (0AH) 192
write register (08H) 191
on-chip debugger 6
on-chip debugger (OCD) 184
on-chip debugger signals 17
on-chip oscillator 197
one-shot mode 79
opcode map
abbreviations 245
cell description 245
first 247
second after 1FH 248
OR 234
ordering information 288
ORX 234
oscillator signals 17
P
p 228
Packaging 287
part number description 293
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
299
part selection guide 2
PC 229
peripheral AC and DC electrical characteristics 212
PHASE=0 timing (SPI) 118
PHASE=1 timing (SPI) 119
pin characteristics 18
polarity 228
POP 233
pop using extended addressing 233
POPX 233
port availability, device 37
port input timing (GPIO) 218
port output timing, GPIO 219
power supply signals 17
power-down, automatic (ADC) 164
power-on and voltage bro wn- ou t 212
power-on reset (POR) 31
program control instructions 234
program counter 229
program memory 20
PUSH 233
push using extended addressing 233
PUSHX 233
PWM mode 79
PxADDR register 41, 275, 27 6, 277, 278, 279, 280,
281, 282
PxCTL register 42, 275, 276, 277, 278, 279, 280,
281, 282
R
R 228
r 228
RA register address 229
RCF 232, 233
receive
10-bit data format (I2C) 140
7-bit data transfer format (I2C) 139
IrDA data 112
receive interrupt 131
receiving UART data-interrupt-driven method 93
receiving UART data-polled method 92
register 126, 155, 228, 265, 268, 269
ADC control (ADCCTL) 166
ADC data high byte (ADCDH) 168
ADC data low bits (ADCDL) 169
baud low and high byte (I2C) 146, 148, 150
baud rate high and low byte (SPI) 127
control (SPI) 123
control, I2C 145
data, SPI 122
DMA status (DMAA_STAT) 160
DMA_ADC address 158
DMA_ADC control DMAACTL) 159
DMAx address high nibble (DMAxH) 156,
268, 270
DMAx control (DMAxCTL) 154, 268, 269
DMAx end/address low byte (DMAxEND)
157, 269, 270
DMAx start/current address low byte register
(DMAxSTART) 157, 268, 270
flash control (FCTL) 177, 285
flash high and low byte (FFREQH and FRE-
EQL) 180
flash page select (FPS) 178
flash status (FSTAT) 178
GPIO port A-H address (PxADDR) 41, 275,
276, 277, 278, 279, 280, 281, 282
GPIO port A-H alternate function sub-registers
43
GPIO port A-H control address (PxCTL) 42,
275, 276, 277, 278, 279, 280, 281, 282
GPIO port A-H data direction sub-registers 42
I2C baud rate high (I2CBRH) 147, 148, 150,
263, 264
I2C control (I2CCTL) 145, 263
I2C data (I2CDATA) 143, 262
I2C status 143, 263
I2C status (I2CSTAT) 143, 263
I2Cbaud rate low (I2CBRL) 147, 263
mode, SPI 126
OCD control 194
OCD status 195
SPI baud rate high byte (SPIBRH) 128, 266
SPI baud rate low byte (SPIBRL) 128, 266
SPI control (SPICTL) 123, 265
SPI data (SPIDATA) 123, 264
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
300
SPI status (SPISTAT) 124, 265
status, I2C 143
status, SPI 124
UARTx baud rate high byte (UxBRH) 107,
259, 262
UARTx baud rate low byte (UxBRL) 107, 260,
262
UARTx Control 0 (UxCTL0) 103, 106, 258,
259, 261
UARTx control 1 (UxCTL1) 104, 259, 261
UARTx receive data (UxRXD) 100, 258, 260
UARTx status 0 (UxSTAT0) 101, 258, 260
UARTx status 1 (UxSTAT1) 102, 259, 261
UARTx transmit data (UxTXD) 100, 258, 260
watchdog timer control (WDTCTL) 85, 283
watchdog timer reload high byte (WDTH) 87,
284
watchdog timer reload low byte (WDTL) 87,
284
watchdog timer reload upper byte (WDTU) 86,
283
register file 19
register file address map 23
register pair 229
register pointer 229
reset
and STOP mode characteristics 29
carry flag 232
controller 6
sources 30
RET 234
return 234
RL 235
RLC 235
rotate and shift instructions 235
rotate left 235
rotate left through carry 235
rotate right 235
rotate right through carry 235
RP 229
RR 229, 235
rr 229
RRC 235
S
SBC 232
SCF 232, 233
SDA and SCL (IrDA) signals 131
second opcode map after 1FH 248
serial clock 117
serial peripheral interface (SPI) 114
set carry flag 232, 233
set register pointer 233
shift right arithmetic 235
shift right logical 235
signal descriptions 15
single-shot conversion (ADC) 164
SIO 6
slave data transfer formats (I2C) 137
slave select 117
software trap 234
source operand 229
SP 229
SPI architecture 114
baud rate generator 121
baud rate high and low byte register 127
clock phase 117
configur ed as slave 115
control register 123
control register definitions 122
data register 122
error detection 120
interrupts 121
mode fault error 120
mode register 126
multi-master operation 119
operation 116
overrun error 120
signals 116
single master, multiple slave system 115
single master, single slave system 114
status register 124
timing, PHASE = 0 118
timing, PHASE=1 119
SPI controller signals 15
SPI mode (SPIMODE) 126, 265
SPIBRH register 128, 266
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
301
SPIBRL register 128, 266
SPICTL register 123, 265
SPIDATA register 123, 264
SPIMODE register 126, 265
SPISTAT register 124, 265
SRA 235
src 229
SRL 235
SRP 233
stack pointer 229
status register, I2C 143
STOP 233
STOP mode 35, 233
Stop Mode Recovery
sources 33
using a GPIO port pin transition 34
using watchdog timer time-out 34
SUB 232
subtract 232
subtract - extended addressing 232
subtract with carry 232
subtract with carry - extended addressing 232
SUBX 232
SWAP 235
swap nibbles 235
symbols, additional 229
system and core resets 30
T
TCM 232
TCMX 232
test complement under mask 232
test complement under mask - extended addressing
232
test under mask 232
test under mask - extended addressing 232
timer signals 16
timers 6, 63
architecture 63
block diagram 64
capture mode 69, 79
capture/compare mode 71, 79
compare mode 70, 79
continuous mode 65, 79
counter mode 66
counter modes 79
gated mode 71, 79
one-shot mode 64, 79
operating mode 64
PWM mode 67, 79
reading the timer count values 72
reload high and low byte registers 75
timer control register definitions 73
timer output signal operation 73
timers 0-3
control 0 registers 77
control 1 registers 78
high and low byte registers 73, 76
TM 232
TMX 232
transmit
IrDA data 111
transmit interrupt 131
transmitting UART data-interrupt-driven method
91
transmitting UART data-polled method 90
TRAP 234
U
UART 5, 88
architecture 88
asynchronous data format without/with parity
90
baud rate generator 99
baud rates table 108
control register definitions 99
controller signals 16
interrupts 97
multiprocessor mode 94
receiving data using interrupt-driven method 93
receiving data using the polled method 92
transmitting data using the interrupt-driven
method 91
transmitting data using the polled method 90
x baud rate high and low registers 106
x control 0 and control 1 registers 103
PS019924-0113 PREL I M I NARY Index
Z8 Encore! XP® F64xx Series
Product Specification
302
x status 0 and status 1 registers 101, 102
Universal Asynchronous Receiver/Transmitter 88
UxBRH register 107, 259, 262
UxBRL register 107, 260, 262
UxCTL0 register 103, 106, 258, 259, 261
UxCTL1 register 104, 259, 261
UxRXD register 100, 258, 260
UxSTAT0 register 101, 258, 260
UxSTAT1 register 102, 259, 261
UxTXD register 100, 258, 260
V
vector 229
voltage brownout reset (VBR) 32
W
watch-dog timer
approximate time-out delay 82
CNTL 32
control register 84
refresh 82
watchdog timer
electrical characteristics and timing 214
interrupt in normal operation 82
interrupt in STOP mode 82
refresh 233
reload unlock sequence 83
reload upper, high and low registers 86
reset 33
reset in normal operation 83
reset in STOP mode 83
time-out response 82
WDTCTL register 85, 283
WDTH register 87, 284
WDTL register 87, 284
working register 228
working register pair 229
WTDU register 86, 283
X
X 229
XOR 234
XORX 234
Z
Z8 Encore!
block diagram 4
features 1
introduction 1
part selection guide 2
PS019924-0113 PR E L I M INARY C ustomer Support
Z8 Encore! XP® F64xx Series
Product Specification
303
Customer Support
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Z8F2421VN020EG Z8F2421VN020SG Z8F2422VS020SG Z8F2422VS020EG Z8F2422AR020EG
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Z8F4822VS020SG Z8F4822VS020EG Z8F6422AR020EG Z8F2421AN020SG Z8F6422AR020SG
Z8F2421AN020EG Z8F4822AR020EG Z8F4822AR020SG Z8F6422VS020EG Z8F6422VS020SG
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Z8F6423FT020SG Z8F4823FT020SG Z8F4823FT020EG Z8F3221PM020SG Z8F3221PM020EG
Z8F6421PM020SG Z8F6421PM020EG Z8F4821PM020SG Z8F4821PM020EG Z8F3221AN020SG
Z8F3221AN020EG Z8F1621AN020SG Z8F1621AN020EG Z8F2421VN020SC Z8F2421PM020SC
Z8F2421AN020SC Z8F1621PM020SC
