2005-2013 Microchip Technology Inc. DS40001270F
PIC10F220/222
Data Sheet
High-Performance Microcontrollers
with 8-Bit A/D
DS40001270F-page 2 2005-2013 Microchip Technology Inc.
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Printed on recycled paper.
ISBN: 9781620775912
2005-2013 Microchip Technology Inc. DS40001270F-page 1
PIC10F220/222
Device Included In This Data Sheet:
•PIC10F220
•PIC10F222
High-Performance RISC CPU:
• Only 33 Single-Word Instructions to Learn
• All Single-Cycle Instructions Except for Program
Branches which are Two-Cycle
• 12-bit Wide Instructions
• 2-Level Deep Hardware Stack
• Direct, Indirect and Relative Addressing modes
for Data and Instructions
• 8-bit Wide Data Path
• 8 Special Function Hardware Registers
• Operating Speed:
- 500 ns instruction cycle with 8 MHz internal
clock
-1s instruction cycle with 4 MHz internal
clock
Special Microcontroller Features:
• 4 or 8 MHz Precision Internal Oscillator:
- Factory calibrated to ±1%
• In-Circuit Serial Programming™ (ICSP™)
• In-Circuit Debugging (ICD) Support
• Power-On Reset (POR)
• Short Device Reset Timer, DRT (1.125 ms typical)
• Watchdog Timer (WDT) with Dedicated On-Chip
RC Oscillator for Reliable Operation
• Programmable Code Protection
• Multiplexed MCLR Input Pin
• Internal Weak Pull-Ups on I/O Pins
• Power-Saving Sleep mode
• Wake-up from Sleep on Pin Change
Low-Power Features/CMOS Technology:
• Operating Current:
-< 175A @ 2V, 4 MHz
• Standby Current:
- 100 nA @ 2V, typical
• Low-Power, High-Speed Flash Technology:
- 100,000 Flash endurance
- > 40-year retention
• Fully Static Design
• Wide Operating Voltage Range: 2.0V to 5.5V
• Wide Temperature Range:
- Industrial: -40C to +85C
- Extended: -40C to +125C
Peripheral Features:
• 4 I/O Pins:
- 3 I/O pins with individual direction control
- 1 input only pin
- High current sink/source for direct LED drive
- Wake-on-change
- Weak pull-ups
• 8-bit Real-Time Clock/Counter (TMR0) with 8-bit
Programmable Prescaler
• Analog-to-Digital (A/D) Converter:
- 8-bit resolution
- 2 external input channels
- 1 internal input channel dedicated
Device
Program Memory Data Memory
I/O Timers
8-bit 8-Bit A/D (ch)
Flash (words) SRAM (bytes)
PIC10F220 256 16 4 1 2
PIC10F222 512 23 4 1 2
6-Pin, 8-Bit Flash Microcontrollers
PIC10F220/222
DS40001270F-page 2 2005-2013 Microchip Technology Inc.
6-Lead SOT-23 Pin Diagram
8-Lead DIP Pin Diagram
8-Lead DFN Pin Diagram
PIC10F220/222
1
2
3
6
5
4
GP0/AN0/ICSPDAT
VSS
GP1/AN1/ICSPCLK
GP3/MCLR/VPP
VDD
GP2/T0CKI/FOSC4
GP2/T0CKI/FOSC4
N/C
N/C
PIC10F220/222
1
2
3
4
8
7
6
5
VDD
GP3/MCLR/VPP
VSS
GP0/AN0/ICSPDAT
GP1/AN1/ICSPCLK
N/C
GP3/MCLR/VPP
VSS
GP0/AN0/ICSPDAT
N/C
GP2/T0CKI/FOSC4
VDD
GP1/AN1/ICSPCLK
1
2
3
4
8
7
6
5
PIC10F220/222
2005-2013 Microchip Technology Inc. DS40001270F-page 3
PIC10F220/222
Table of Contents
1.0 General Description...................................................................................................................................................................... 5
2.0 Device Varieties .......................................................................................................................................................................... 7
3.0 Architectural Overview ................................................................................................................................................................. 9
4.0 Memory Organization ................................................................................................................................................................. 13
5.0 I/O Port ....................................................................................................................................................................................... 21
6.0 TMR0 Module and TMR0 Register............................................................................................................................................. 25
7.0 Analog-to-Digital (A/D) converter ............................................................................................................................................... 29
8.0 Special Features Of The CPU.................................................................................................................................................... 33
9.0 Instruction Set Summary ............................................................................................................................................................ 43
10.0 Electrical Characteristics............................................................................................................................................................ 51
11.0 Development Support................................................................................................................................................................. 61
12.0 DC and AC Characteristics Graphs and Charts ......................................................................................................................... 69
13.0 Packaging Information................................................................................................................................................................ 73
Index .................................................................................................................................................................................................... 81
The Microchip Web Site....................................................................................................................................................................... 83
Customer Change Notification Service ................................................................................................................................................ 83
Customer Support ................................................................................................................................................................................ 83
Product Identification System .............................................................................................................................................................. 85
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PIC10F220/222
DS40001270F-page 4 2005-2013 Microchip Technology Inc.
NOTES:
2005-2013 Microchip Technology Inc. DS40001270F-page 5
PIC10F220/222
1.0 GENERAL DESCRIPTION
The PIC10F220/222 devices from Microchip
Technology are low-cost, high-performance, 8-bit, fully-
static Flash-based CMOS microcontrollers. They
employ a RISC architecture with only 33 single-word/
single-cycle instructions. All instructions are single-
cycle (1 s) except for program branches, which take
two cycles. The PIC10F220/222 devices deliver perfor-
mance in an order of magnitude higher than their com-
petitors in the same price category. The 12-bit wide
instructions are highly symmetrical, resulting in a
typical 2:1 code compression over other 8-bit
microcontrollers in its class. The easy-to-use and easy
to remember instruction set reduces development time
significantly.
The PIC10F220/222 products are equipped with spe-
cial features that reduce system cost and power
requirements. The Power-on Reset (POR) and Device
Reset Timer (DRT) eliminates the need for the external
Reset circuitry. INTOSC Internal Oscillator mode is pro-
vided, thereby, preserving the limited number of I/O
available. Power-Saving Sleep mode, Watchdog Timer
and code protection features improve system cost,
power and reliability.
The PIC10F220/222 devices are available in cost-
effective Flash, which is suitable for production in any
volume. The customer can take full advantage of
Microchip’s price leadership in Flash programmable
microcontrollers while benefiting from the Flash
programmable flexibility.
The PIC10F220/222 products are supported by a full-
featured macro assembler, a software simulator, an in-
circuit debugger, a ‘C’ compiler, a low-cost
development programmer and a full featured program-
mer. All the tools are supported on IBM® PC and
compatible machines.
1.1 Applications
The PIC10F220/222 devices fit in applications ranging
from personal care appliances and security systems to
low-power remote transmitters/receivers. The Flash
technology makes customizing application programs
(transmitter codes, appliance settings, receiver fre-
quencies, etc.) extremely fast and convenient. The
small footprint packages, for through hole or surface
mounting, make these microcontrollers well suited for
applications with space limitations. Low-cost, low-
power, high-performance, ease-of-use and I/O flexibil-
ity make the PIC10F220/222 devices very versatile,
even in areas where no microcontroller use has been
considered before (e.g., timer functions, logic and
PLDs in larger systems and coprocessor applications).
TABLE 1-1: PIC10F220/222 DEVICES(1), (2)
PIC10F220 PIC10F222
Clock Maximum Frequency of Operation (MHz) 8 8
Memory Flash Program Memory 256 512
Data Memory (bytes) 16 23
Peripherals Timer Module(s) TMR0 TMR0
Wake-up from Sleep on pin change Yes Yes
Analog inputs 2 2
Features I/O Pins 3 3
Input Only Pins 1 1
Internal Pull-ups Yes Yes
In-Circuit Serial Programming™ Yes Yes
Number of instructions 33 33
Packages 6-pin SOT-23,
8-pin DIP, DFN
6-pin SOT-23,
8-pin DIP, DFN
Note 1: The PIC10F220/222 devices have Power-on Reset, selectable Watchdog Timer, selectable code-protect, high I/O
current capability and precision internal oscillator.
2: The PIC10F220/222 devices use serial programming with data pin GP0 and clock pin GP1.
PIC10F220/222
DS40001270F-page 6 2005-2013 Microchip Technology Inc.
NOTES:
2005-2013 Microchip Technology Inc. DS40001270F-page 7
PIC10F220/222
2.0 DEVICE VARIETIES
A variety of packaging options are available. Depend-
ing on application and production requirements, the
proper device option can be selected using the
information in this section. When placing orders, please
use the PIC10F220/222 Product Identification System
at the back of this data sheet to specify the correct part
number.
2.1 Quick Turn Programming (QTP)
Devices
Microchip offers a QTP programming service for
factory production orders. This service is made
available for users who choose not to program
medium-to-high quantity units and whose code
patterns have stabilized. The devices are identical to
the Flash devices but with all Flash locations and fuse
options already programmed by the factory. Certain
code and prototype verification procedures do apply
before production shipments are available. Please
contact your local Microchip Technology sales office for
more details.
2.2 Serialized Quick Turn
ProgrammingSM (SQTPSM) Devices
Microchip offers a unique programming service, where
a few user-defined locations in each device are
programmed with different serial numbers. The serial
numbers may be random, pseudo-random or
sequential.
Serial programming allows each device to have a
unique number, which can serve as an entry-code,
password or ID number.
PIC10F220/222
DS40001270F-page 8 2005-2013 Microchip Technology Inc.
NOTES:
2005-2013 Microchip Technology Inc. DS40001270F-page 9
PIC10F220/222
3.0 ARCHITECTURAL OVERVIEW
The high performance of the PIC10F220/222 devices
can be attributed to a number of architectural features
commonly found in RISC microprocessors. To begin
with, the PIC10F220/222 devices use a Harvard archi-
tecture in which program and data are accessed on
separate buses. This improves bandwidth over tradi-
tional von Neumann architectures where program and
data are fetched on the same bus. Separating program
and data memory further allows instructions to be sized
differently than the 8-bit wide data word. Instruction
opcodes are 12 bits wide, making it possible to have all
single-word instructions. A 12-bit wide program mem-
ory access bus fetches a 12-bit instruction in a single
cycle. A two-stage pipeline overlaps fetch and execu-
tion of instructions. Consequently, all instructions (33)
execute in a single cycle (1 s @ 4 MHz or 500 ns @
8 MHz) except for program branches.
The table below lists program memory (Flash) and data
memory (RAM) for the PIC10F220/222 devices.
The PIC10F220/222 devices can directly or indirectly
address its register files and data memory. All Special
Function Registers (SFR), including the PC, are
mapped in the data memory. The PIC10F220/222
devices have a highly orthogonal (symmetrical) instruc-
tion set that makes it possible to carry out any opera-
tion, on any register, using any addressing mode. This
symmetrical nature and lack of “special optimal situa-
tions” make programming with the PIC10F220/222
devices simple, yet efficient. In addition, the learning
curve is reduced significantly.
The PIC10F220/222 devices contain an 8-bit ALU and
working register. The ALU is a general purpose arith-
metic unit. It performs arithmetic and Boolean functions
between data in the working register and any register
file.
The ALU is 8-bits wide and capable of addition, sub-
traction, shift and logical operations. Unless otherwise
mentioned, arithmetic operations are two’s comple-
ment in nature. In two-operand instructions, one oper-
and is typically the W (working) register. The other
operand is either a file register or an immediate
constant. In single operand instructions, the operand is
either the W register or a file register.
The W register is an 8-bit working register used for ALU
operations. It is not an addressable register.
Depending on the instruction executed, the ALU may
affect the values of the Carry (C), Digit Carry (DC) and
Zero (Z) bits in the STATUS register. The C and DC bits
operate as a borrow and digit borrow out bit, respec-
tively, in subtraction. See the SUBWF and ADDWF
instructions for examples.
A simplified block diagram is shown in Figure 3-1 with
the corresponding device pins described in Table 3-1.
Device
Memory
Program Data
PIC10F220 256 x 12 16 x 8
PIC10F222 512 x 12 23 x 8
PIC10F220/222
DS40001270F-page 10 2005-2013 Microchip Technology Inc.
FIGURE 3-1: BLOCK DIAGRAM
TABLE 3-1: PINOUT DESCRIPTION
Name Function Input
Type
Output
Type Description
GP0/AN0/ICSPDAT GP0 TTL CMOS Bidirectional I/O pin. Can be software programmed for internal weak
pull-up and wake-up from Sleep on pin change.
AN0 AN — Analog Input
ICSPDAT ST CMOS In-Circuit programming data
GP1/AN1/ICSPCLK GP1 TTL CMOS Bidirectional I/O pin. Can be software programmed for internal weak
pull-up and wake-up from Sleep on pin change.
AN1 AN — Analog Input
ICSPCLK ST — In-Circuit programming clock
GP2/T0CKI/FOSC4 GP2 TTL CMOS Bidirectional I/O pin
T0CKI ST — Clock input to TMR0
FOSC4 — CMOS Oscillator/4 output
GP3/MCLR/VPP GP3 TTL — Input pin. Can be software programmed for internal weak pull-up and
wake-up from Sleep on pin change.
MCLR ST — Master Clear (Reset). When configured as MCLR, this pin is an
active-low Reset to the device. Voltage on MCLR/VPP must not
exceed VDD during normal device operation or the device will enter
Programming mode.
VPP HV — Programming voltage input
VDD VDD P — Positive supply for logic and I/O pins
VSS VSS P — Ground reference for logic and I/O pins
Legend: I = Input, O = Output, I/O = Input/Output, P = Power, — = Not used, TTL = TTL input,
ST = Schmitt Trigger input, AN = Analog Input
Flash
Program
Memory
9-10 Data Bus 8
12
Program
Bus
Instruction Reg
Program Counter
RAM
File
Registers
Direct Addr 5
RAM Addr 9
Addr MUX
Indirect
Addr
FSR Reg
STATUS Reg
MUX
ALU
W Reg
Device Reset
Power-on
Reset
Watchdog
Timer
Instruction
Decode &
Control
Timing
Generation
MCLR
VDD, VSS
Timer0
GPIO
8
8
GP3/MCLR/VPP
GP2/T0CKI/FOSC4
GP1/AN1/ICSPCLK
GP0/AN0/ICSPDAT
5-7
3
STACK1
STACK2
23 or 16
Internal RC
Clock
512 x 12 or
bytes
Timer
256 x 12
ADC
AN1
AN0
Absolute
Voltage
Reference
2005-2013 Microchip Technology Inc. DS40001270F-page 11
PIC10F220/222
3.1 Clocking Scheme/Instruction
Cycle
The clock is internally divided by four to generate four
non-overlapping quadrature clocks, namely Q1, Q2,
Q3 and Q4. Internally, the PC is incremented every Q1,
and the instruction is fetched from program memory
and latched into the Instruction Register (IR) in Q4. It is
decoded and executed during Q1 through Q4. The
clocks and instruction execution flow is shown in
Figure 3-2 and Example 3-1.
3.2 Instruction Flow/Pipelining
An instruction cycle consists of four Q cycles (Q1, Q2,
Q3 and Q4). The instruction fetch and execute are
pipelined such that fetch takes one instruction cycle,
while decode and execute takes another instruction
cycle. However, due to the pipelining, each instruction
effectively executes in one cycle. If an instruction
causes the PC to change (e.g., GOTO) then two cycles
are required to complete the instruction (Example 3-1).
A fetch cycle begins with the PC incrementing in Q1.
In the execution cycle, the fetched instruction is latched
into the Instruction Register in cycle Q1. This instruc-
tion is then decoded and executed during the Q2, Q3
and Q4 cycles. Data memory is read during Q2
(operand read) and written during Q4 (destination
write).
FIGURE 3-2: CLOCK/INSTRUCTION CYCLE
EXAMPLE 3-1: INSTRUCTION PIPELINE FLOW
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
Q1
Q2
Q3
Q4
PC PC PC + 1 PC + 2
Fetch INST (PC)
Execute INST (PC - 1) Fetch INST (PC + 1)
Execute INST (PC) Fetch INST (PC + 2)
Execute INST (PC + 1)
Internal
phase
clock
All instructions are single cycle, except for any program branches. These take two cycles, since the fetch instruction
is “flushed” from the pipeline, while the new instruction is being fetched and then executed.
1. MOVLW 03H Fetch 1 Execute 1
2. MOVWF GPIO Fetch 2 Execute 2
3. CALL SUB_1 Fetch 3 Execute 3
4. BSF GPIO, BIT1 Fetch 4 Flush
Fetch SUB_1 Execute SUB_1
PIC10F220/222
DS40001270F-page 12 2005-2013 Microchip Technology Inc.
NOTES:
2005-2013 Microchip Technology Inc. DS40001270F-page 13
PIC10F220/222
4.0 MEMORY ORGANIZATION
The PIC10F220/222 memories are organized into pro-
gram memory and data memory. Data memory banks
are accessed using the File Select Register (FSR).
4.1 Program Memory Organization for
the PIC10F220
The PIC10F220 devices have a 9-bit Program Counter
(PC) capable of addressing a 512 x 12 program
memory space.
Only the first 256 x 12 (0000h-00FFh) for the
PIC10F220 are physically implemented (see
Figure 4-1). Accessing a location above these
boundaries will cause a wrap-around within the first
256 x 12 space (PIC10F220). The effective Reset
vector is at 0000h, (see Figure 4-1). Location 00FFh
(PIC10F220) contains the internal clock oscillator
calibration value. This value should never be
overwritten.
FIGURE 4-1: PROGRAM MEMORY MAP
AND STACK FOR THE
PIC10F220
4.2 Program Memory Organization for
the PIC10F222
The PIC10F222 devices have a 10-bit Program
Counter (PC) capable of addressing a 1024 x 12
program memory space.
Only the first 512 x 12 (0000h-01FFh) for the Mem-
High are physically implemented (see Figure 4-2).
Accessing a location above these boundaries will
cause a wrap-around within the first 512 x 12 space
(PIC10F222). The effective Reset vector is at 0000h,
(see Figure 4-2). Location 01FFh (PIC10F222) con-
tains the internal clock oscillator calibration value.
This value should never be overwritten.
FIGURE 4-2: PROGRAM MEMORY MAP
AND STACK FOR THE
PIC10F222
CALL, RETLW
PC<7:0>
Stack Level 1
Stack Level 2
User Memory
Space
9
0000h
01FFh
On-chip Program
Memory
Reset Vector(1)
Note 1: Address 0000h becomes the
effective Reset vector. Location 00FFh
contains the MOVLW XX internal oscillator
calibration value.
256 Word 00FFh
0100h
<8:0>
CALL, RETLW
PC<8:0>
Stack Level 1
Stack Level 2
User Memory
Space
10
0000h
02FFh
Reset Vector(1)
Note 1: Address 0000h becomes the effective
Reset vector. Location 01FFh contains the
MOVLW XX internal oscillator calibration
value.
512 Words 01FFh
0200h
On-chip Program
Memory
<9:0>
PIC10F220/222
DS40001270F-page 14 2005-2013 Microchip Technology Inc.
4.3 Data Memory Organization
Data memory is composed of registers or bytes of
RAM. Therefore, data memory for a device is specified
by its register file. The register file is divided into two
functional groups: Special Function Registers (SFR)
and General Purpose Registers (GPR).
The Special Function Registers include the TMR0 reg-
ister, the Program Counter (PCL), the STATUS register,
the I/O register (GPIO) and the File Select Register
(FSR). In addition, Special Function Registers are used
to control the I/O port configuration and prescaler
options.
The General Purpose Registers are used for data and
control information under command of the instructions.
For the PIC10F220, the register file is composed of 9
Special Function Registers and 16 General Purpose
Registers (Figure 4-3, Figure 4-4).
For the PIC10F222, the register file is composed of 9
Special Function Registers and 23 General Purpose
Registers (Figure 4-4).
4.3.1 GENERAL PURPOSE REGISTER
FILE
The General Purpose Register file is accessed, either
directly or indirectly, through the File Select Register
(FSR). See Section 4.9 “Indirect Data Addressing;
INDF and FSR Registers”.
FIGURE 4-3: PIC10F220 REGISTER
FILE MAP
FIGURE 4-4: PIC10F222 REGISTER
FILE MAP
4.3.2 SPECIAL FUNCTION REGISTERS
The Special Function Registers (SFRs) are registers
used by the CPU and peripheral functions to control the
operation of the device (Table 4-1).
The Special Function Registers can be classified into
two sets. The Special Function Registers associated
with the “core” functions are described in this section.
Those related to the operation of the peripheral
features are described in the section for each
peripheral feature.
File Address
00h
01h
02h
03h
04h
05h
06h
07h
10h
INDF(1)
TMR0
PCL
STATUS
FSR
OSCCAL
GPIO
General
Purpose
Registers
Note 1: Not a physical register. See Section 4.9
“Indirect Data Addressing; INDF and
FSR Registers”.
2: Unimplemented, read as 00h.
08h
ADCON0
0Fh
1Fh
Unimplemented(2)
ADRES
09h
File Address
00h
01h
02h
03h
04h
05h
06h
07h
1Fh
INDF(1)
TMR0
PCL
STATUS
FSR
OSCCAL
GPIO
Note 1: Not a physical register. See Section 4.9
“Indirect Data Addressing; INDF and
FSR Registers”.
08h ADRES
09h
ADCON0
General
Purpose
Registers
2005-2013 Microchip Technology Inc. DS40001270F-page 15
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TABLE 4-1: SPECIAL FUNCTION REGISTER (SFR) SUMMARY
4.4 STATUS Register
This register contains the arithmetic status of the ALU,
the Reset status and the page preselect bit.
The STATUS register can be the destination for any
instruction, as with any other register. If the STATUS
register is the destination for an instruction that affects
the Z, DC or C bits, then the write to these three bits is
disabled. These bits are set or cleared according to the
device logic. Furthermore, the TO and PD bits are not
writable. Therefore, the result of an instruction with the
STATUS register as destination may be different than
intended.
For example, CLRF STATUS will clear the upper three
bits and set the Z bit. This leaves the STATUS register
as 000u u1uu (where u = unchanged).
Therefore, it is recommended that only BCF, BSF and
MOVWF instructions be used to alter the STATUS regis-
ter. These instructions do not affect the Z, DC or C bits
from the STATUS register. For other instructions, which
do affect Status bits, see Instruction Set Summary.
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
Power-On
Reset(2)
Page #
00h INDF Uses contents of FSR to address data memory (not a physical register) xxxx xxxx 20
01h TMR0 8-Bit Real-Time Clock/Counter xxxx xxxx 25
02h PCL(1) Low Order 8 Bits of PC 1111 1111 19
03h STATUS GPWUF ——TOPD ZDCC0--1 1xxx(3) 15
04h FSR Indirect Data Memory Address Pointer 111x xxxx 20
05h OSCCAL CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 FOSC4 1111 1110 18
06h GPIO — — — — GP3 GP2 GP1 GP0 ---- xxxx 21
07h ADCON0 ANS1 ANS0 —— CHS1 CHS0 GO/DONE ADON 11-- 1100 30
08h ADRES Result of Analog-to-Digital Conversion xxxx xxxx 31
N/A TRISGPIO — — — — I/O Control Register ---- 1111 23
N/A OPTION GPWU GPPU T0CS T0SE PSA PS2 PS1 PS0 1111 1111 17
Legend: – = unimplemented, read as ‘0’, x = unknown, u = unchanged, q = value depends on condition.
Note 1: The upper byte of the Program Counter is not directly accessible. See Section 4.7 “Program Counter” for an
explanation of how to access these bits.
2: Other (non Power-up) Resets include external Reset through MCLR, Watchdog Timer and wake-up on pin change
Reset.
3: See Table 8-1 for other Reset specific values.
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REGISTER 4-1: STATUS REGISTER (ADDRESS: 03h)
R/W-0 R/W-0 R/W-0 R-1 R-1 R/W-x R/W-x R/W-x
GPWUF ——TOPD ZDCC
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 GPWUF: GPIO Reset bit
1 = Reset due to wake-up from Sleep on pin change
0 = After power-up or other Reset
bit 6 Reserved: Do not use. Use of this bit may affect upward compatibility with future products.
bit 5 Reserved: Do not use. Use of this bit may affect upward compatibility with future products.
bit 4 TO: Time-out bit
1 = After power-up, CLRWDT instruction or SLEEP instruction
0 = A WDT time-out occurred
bit 3 PD: Power-down bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
bit 2 Z: Zero bit
1 = The result of an arithmetic or logic operation is zero
0 = The result of an arithmetic or logic operation is not zero
bit 1 DC: Digit carry/borrow bit (for ADDWF and SUBWF instructions)
ADDWF:
1 = A carry to the 4th low-order bit of the result occurred
0 = A carry to the 4th low-order bit of the result did not occur
SUBWF:
1 = A borrow from the 4th low-order bit of the result did not occur
0 = A borrow from the 4th low-order bit of the result occurred
bit 0 C: Carry/borrow bit (for ADDWF, SUBWF and RRF, RLF instructions)
ADDWF: SUBWF: RRF or RLF:
1 = A carry occurred 1 = A borrow did not occur Load bit with LSb or MSb, respectively
0 = A carry did not occur 0 = A borrow occurred
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4.5 OPTION Register
The OPTION register is a 8-bit wide, write-only register,
which contains various control bits to configure the
Timer0/WDT prescaler and Timer0.
The OPTION register is not memory mapped and is
therefore only addressable by executing the OPTION
instruction, the contents of the W register will be trans-
ferred to the OPTION register. A Reset sets the
OPTION<7:0> bits.
Note: If TRIS bit is set to ‘0’, the wake-up on
change and pull-up functions are disabled
for that pin (i.e., note that TRIS overrides
Option control of GPPU and GPWU).
Note: If the T0CS bit is set to ‘1’, it will override
the TRIS function on the T0CKI pin.
REGISTER 4-2: OPTION REGISTER
W-1 W-1 W-1 W-1 W-1 W-1 W-1 W-1
GPWU GPPU T0CS T0SE PSA PS2 PS1 PS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 GPWU: Enable Wake-up On Pin Change bit (GP0, GP1, GP3)
1 = Disabled
0 = Enabled
bit 6 GPPU: Enable Weak Pull-ups bit (GP0, GP1, GP3)
1 = Disabled
0 = Enabled
bit 5 T0CS: Timer0 Clock Source Select bit
1 = Transition on T0CKI pin (overrides TRIS on the T0CKI pin)
0 = Transition on internal instruction cycle clock, FOSC/4
bit 4 T0SE: Timer0 Source Edge Select bit
1 = Increment on high-to-low transition on the T0CKI pin
0 = Increment on low-to-high transition on the T0CKI pin
bit 3 PSA: Prescaler Assignment bit
1 = Prescaler assigned to the WDT
0 = Prescaler assigned to Timer0
bit 2-0 PS<2:0>: Prescaler Rate Select bits
000
001
010
011
100
101
110
111
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
Bit Value Timer0 Rate WDT Rate
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4.6 OSCCAL Register
The Oscillator Calibration (OSCCAL) register is used to
calibrate the internal precision 4/8 MHz oscillator. It
contains seven bits for calibration.
After you move in the calibration constant, do not
change the value. See Section 8.2.2 “Internal 4/8 MHz
Oscillator”.
Note: Erasing the device will also erase the pre-
programmed internal calibration value for
the internal oscillator. The calibration
value must be read prior to erasing the
part so it can be reprogrammed correctly
later.
REGISTER 4-3: OSCCAL – OSCILLATOR CALIBRATION REGISTER (ADDRESS: 05h)
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-0
CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 FOSC4
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-1 CAL<6:0>: Oscillator Calibration bits
0111111 = Maximum frequency
•
•
•
0000001
0000000 = Center frequency
1111111
•
•
•
1000000 = Minimum frequency
bit 0 FOSC4: INTOSC/4 Output Enable bit(1)
1 = INTOSC/4 output onto GP2
0 = GP2/T0CKI applied to GP2
Note 1: Overrides GP2/T0CKI control registers when enabled.
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4.7 Program Counter
As a program instruction is executed, the Program
Counter (PC) will contain the address of the next
program instruction to be executed. The PC value is
increased by one every instruction cycle, unless an
instruction changes the PC.
For a GOTO instruction, bits 8:0 of the PC are provided
by the GOTO instruction word. The PC Latch (PCL) is
mapped to PC<7:0>.
For a CALL instruction or any instruction where the PCL
is the destination, bits 7:0 of the PC again are provided
by the instruction word. However, PC<8> does not
come from the instruction word, but is always cleared
(Figure 4-5).
Instructions where the PCL is the destination or Modify
PCL instructions, include MOVWF PC, ADDWF PC and
BSF PC, 5.
FIGURE 4-5: LOADING OF PC
BRANCH INSTRUCTIONS
4.7.1 EFFECTS OF RESET
The PC is set upon a Reset, which means that the PC
addresses the last location in program memory (i.e.,
the oscillator calibration instruction). After executing
MOVLW XX, the PC will roll over to location 0000h and
begin executing user code.
4.8 Stack
The PIC10F220 device has a 2-deep, 8-bit wide
hardware PUSH/POP stack.
The PIC10F222 device has a 2-deep, 9-bit wide
hardware PUSH/POP stack.
A CALL instruction will PUSH the current value of stack
1 into stack 2 and then PUSH the current PC value,
incremented by one, into stack level 1. If more than two
sequential CALL’s are executed, only the most recent
two return addresses are stored.
A RETLW instruction will POP the contents of stack level
1 into the PC and then copy stack level 2 contents into
level 1. If more than two sequential RETLW’s are exe-
cuted, the stack will be filled with the address
previously stored in level 2.
Note: Because PC<8> is cleared in the CALL
instruction or any Modify PCL instruction,
all subroutine calls or computed jumps are
limited to the first 256 locations of any
program memory page (512 words long).
PC
87 0
PCL
Instruction Word
GOTO Instruction
CALL or Modify PCL Instruction
PC
87 0
PCL
Instruction Word
Reset to ‘0’
Note 1: The W register will be loaded with the lit-
eral value specified in the instruction. This
is particularly useful for the implementa-
tion of data look-up tables within the
program memory.
2: There are no Status bits to indicate stack
overflows or stack underflow conditions.
3: There are no instructions mnemonics
called PUSH or POP. These are actions
that occur from the execution of the CALL
and RETLW instructions.
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4.9 Indirect Data Addressing; INDF
and FSR Registers
The INDF register is not a physical register. Addressing
INDF actually addresses the register whose address is
contained in the FSR register (FSR is a pointer). This is
indirect addressing.
4.9.1 INDIRECT ADDRESSING
• Register file 09 contains the value 10h
• Register file 0A contains the value 0Ah
• Load the value 09 into the FSR register
• A read of the INDF register will return the value
of 10h
• Increment the value of the FSR register by one
(FSR = 0A)
• A read of the INDR register now will return the
value of 0Ah.
Reading INDF itself indirectly (FSR = 0) will produce
00h. Writing to the INDF register indirectly results in a
no-operation (although Status bits may be affected).
A simple program to clear RAM locations 10h-1Fh
using Indirect addressing is shown in Example 4-1.
EXAMPLE 4-1: HOW TO CLEAR RAM
USING INDIRECT
ADDRESSING
The FSR is a 5-bit wide register. It is used in conjunc-
tion with the INDF register to indirectly address the data
memory area.
The FSR<4:0> bits are used to select data memory
addresses 00h to 1Fh.
FIGURE 4-6: DIRECT/INDIRECT ADDRESSING
Note: Do not use banking. FSR <7:5> are
unimplemented and read as ‘1’s.
MOVLW 0x10 ;initialize pointer
MOVWF FSR ;to RAM
NEXT CLRF INDF ;clear INDF
;register
INCF FSR,F ;inc pointer
BTFSC FSR,4 ;all done?
GOTO NEXT ;NO, clear next
CONTINUE
: ;YES, continue
:
Note 1: For register map detail, see Section 4.3 “Data Memory Organization”.
Location Select
Location Select
Indirect Addressing
Direct Addressing
Data
Memory(1) 0Fh
10h
Bank 0
0
4(FSR)
00h
1Fh
(opcode) 04
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5.0 I/O PORT
As with any other register, the I/O register(s) can be
written and read under program control. However, read
instructions (e.g., MOVF GPIO, W) always read the I/O
pins independent of the pin’s Input/Output modes. On
Reset, all I/O ports are defined as input (inputs are at
high-impedance) since the I/O control registers are all
set.
5.1 GPIO
GPIO is an 8-bit I/O register. Only the low-order 4 bits
are used (GP<3:0>). Bits 7 through 4 are unimple-
mented and read as ‘0’s. Please note that GP3 is an
input only pin. Pins GP0, GP1 and GP3 can be config-
ured with weak pull-ups and also for wake-up on
change. The wake-up on change and weak pull-up
functions are not individually pin selectable. If GP3/
MCLR is configured as MCLR, a weak pull-up can be
enabled via the Configuration Word. Configuring GP3
as MCLR disables the wake-up on change function for
this pin.
5.2 TRIS Registers
The Output Driver Control register is loaded with the
contents of the W register by executing the TRIS f
instruction. A ‘1’ from a TRIS register bit puts the corre-
sponding output driver in a High-Impedance mode. A
‘0’ puts the contents of the output data latch on the
selected pins, enabling the output buffer. The excep-
tions are GP3, which is input only, and the GP2/T0CKI/
FOSC4 pin, which may be controlled by various
registers. See Table 5-1.
The TRIS registers are “write-only” and are set (output
drivers disabled) upon Reset.
5.3 I/O Interfacing
The equivalent circuit for an I/O port pin is shown in
Figure 5-1. All port pins, except GP3, which is input
only, may be used for both input and output operations.
For input operations, these ports are non-latching. Any
input must be present until read by an input instruction
(e.g., MOVF GPIO, W). The outputs are latched and
remain unchanged until the output latch is rewritten. To
use a port pin as output, the corresponding direction
control bit in TRIS must be cleared (= 0). For use as an
input, the corresponding TRIS bit must be set. Any I/O
pin (except GP3) can be programmed individually as
input or output.
FIGURE 5-1: EQUIVALENT CIRCUIT
FOR A SINGLE I/O PIN
TABLE 5-1: ORDER OF PRECEDENCE FOR PIN FUNCTIONS
TABLE 5-2: REQUIREMENTS TO MAKE PINS AVAILABLE IN DIGITAL MODE
Note: A read of the ports reads the pins, not the
output data latches. That is, if an output
driver on a pin is enabled and driven high,
but the external system is holding it low, a
read of the port will indicate that the pin is
low.
Data
Bus
Q
D
Q
CK
Q
D
Q
CK P
N
WR
Port
TRIS ‘f’
Data
TRIS
RD Port
VSS
VDD
I/O
pin
W
Reg
Latch
Latch
Reset
Note 1: I/O pins have protection diodes to VDD and
VSS.
2: See Table 3-1 for buffer type.
VSS
VDD
(2)
(1)
Priority GP0 GP1 GP2 GP3
1 AN0 AN1 FOSC4 MCLR
2 TRIS GPIO TRIS GPIO T0CKI —
3—— TRIS GPIO —
Bit GP0 GP1 GP2 GP3
FOSC4 — — 0—
T0CS — — 0—
ANS1 —0— —
ANS0 0— — —
MCLRE ——— 0
Legend: — = Condition of bit will have no effect on the setting of the pin to Digital mode.
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FIGURE 5-2: BLOCK DIAGRAM OF GP0
AND GP1
FIGURE 5-3: BLOCK DIAGRAM OF GP2
FIGURE 5-4: BLOCK DIAGRAM OF GP3
Data
Bus
QD
Q
CK
QD
Q
CK
WR
Port
TRIS ‘f’
Data
TRIS
RD Port
W
Reg
Latch
Latch
Reset
Note 1: I/O pins have protection diodes to VDD and
VSS.
D
CK
Q
Mis-Match
GPPU
ADC
I/O Pin(1)
Analog Enable
Data
Bus
QD
Q
CK
QD
Q
CK
WR
Port
TRIS ‘f’
Data
TRIS
RD Port
W
Reg
Latch
Latch
Reset
Note 1: I/O pins have protection diodes to VDD and
VSS.
T0CKI
I/O Pin(1)
T0CS
FOSC4
OSCCAL<0>
Data Bus
RD Port
Note 1: GP3/MCLR pin has a protection diode to VSS
only.
GPPU
D
CK
Q
Mis-match
MCLRE
Reset
I/O Pin(1)
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TABLE 5-3: SUMMARY OF PORT REGISTERS
5.4 I/O Programming Considerations
5.4.1 BIDIRECTIONAL I/O PORTS
Some instructions operate internally as read followed
by write operations. The BCF and BSF instructions, for
example, read the entire port into the CPU, execute the
bit operation and re-write the result. Caution must be
used when these instructions are applied to a port
where one or more pins are used as input/outputs. For
example, a BSF operation on bit 2 of GPIO will cause
all eight bits of GPIO to be read into the CPU, bit 2 to
be set and the GPIO value to be written to the output
latches. If another bit of GPIO is used as a bidirectional
I/O pin (say bit 0) and it is defined as an input at this
time, the input signal present on the pin itself would be
read into the CPU and rewritten to the data latch of this
particular pin, overwriting the previous content. As long
as the pin stays in the Input mode, no problem occurs.
However, if bit 0 is switched into Output mode later on,
the content of the data latch may now be unknown.
Example 5-1 shows the effect of two sequential
Read-Modify-Write instructions (e.g., BCF, BSF, etc.)
on an I/O port.
A pin actively outputting a high or a low should not be
driven from external devices at the same time in order
to change the level on this pin (“wired-or”, “wired-and”).
The resulting high output currents may damage the
chip.
EXAMPLE 5-1: I/O PORT READ-MODIFY-
WRITE INSTRUCTIONS
5.4.2 SUCCESSIVE OPERATIONS ON I/O
PORTS
The actual write to an I/O port happens at the end of an
instruction cycle, whereas for reading, the data must be
valid at the beginning of the instruction cycle (Figure 5-5).
Therefore, care must be exercised if a write followed by
a read operation is carried out on the same I/O port. The
sequence of instructions should allow the pin voltage to
stabilize (load dependent) before the next instruction
causes that file to be read into the CPU. Otherwise, the
previous state of that pin may be read into the CPU rather
than the new state. When in doubt, it is better to separate
these instructions with a NOP or another instruction not
accessing this I/O port.
FIGURE 5-5: SUCCESSIVE I/O OPERATION
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
Power-On
Reset
Value on
All Other Resets
N/A TRISGPIO — — — — I/O Control Registers ---- 1111 ---- 1111
N/A OPTION GPWU GPPU T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
03h STATUS GPWUF — — TO PD ZDC C0001 1xxx q00q quuu(1)
06h GPIO — — — — GP3 GP2 GP1 GP0 ---- xxxx ---- uuuu
Legend: Shaded cells not used by PORT registers, read as ‘0’, – = unimplemented, read as ‘0’, x = unknown, u = unchanged,
q = depends on condition.
Note 1: If Reset was due to wake-up on pin change, then bit 7 = 1. All other Resets will cause bit 7 = 0.
;Initial GPIO Settings
;GPIO<3:2> Inputs
;GPIO<1:0> Outputs
;
; GPIO latch GPIO pins
; ---------- ----------
BCF GPIO, 1 ;---- pp01 ---- pp11
BCF GPIO, 0 ;---- pp10 ---- pp11
MOVLW 007h;
TRIS GPIO ;---- pp10 ---- pp11
;
Note: The user may have expected the pin values to
be ---- pp00. The second BCF caused GP1
to be latched as the pin value (High).
PC PC + 1 PC + 2 PC + 3
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Instruction
Fetched
GP<2:0>
MOVWF GPIO NOP
Port pin
sampled here
NOP
MOVF GPIO, W
Instruction
Executed MOVWF GPIO
(Write to GPIO)
NOPMOVF GPIO,W
This example shows a write to GPIO followed
by a read from GPIO.
Data setup time = (0.25 TCY – TPD)
where: TCY = instruction cycle
TPD = propagation delay
Therefore, at higher clock frequencies, a
write followed by a read may be problematic.
(Read GPIO)
Port pin
written here
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6.0 TMR0 MODULE AND TMR0
REGISTER
The Timer0 module has the following features:
• 8-bit timer/counter register, TMR0
• Readable and writable
• 8-bit software programmable prescaler
• Internal or external clock select:
- Edge select for external clock
Figure 6-1 is a simplified block diagram of the Timer0
module.
Timer mode is selected by clearing the T0CS bit
(OPTION<5>). In Timer mode, the Timer0 module will
increment every instruction cycle (without prescaler). If
TMR0 register is written, the increment is inhibited for
the following two cycles (Figure 6-2 and Figure 6-3).
The user can work around this by writing an adjusted
value to the TMR0 register.
Counter mode is selected by setting the T0CS bit
(OPTION<5>). In this mode, Timer0 will increment
either on every rising or falling edge of pin T0CKI. The
T0SE bit (OPTION<4>) determines the source edge.
Clearing the T0SE bit selects the rising edge. Restric-
tions on the external clock input are discussed in detail
in Section 6.1 “Using Timer0 With An External
Clock”.
The prescaler may be used by either the Timer0
module or the Watchdog Timer, but not both. The
prescaler assignment is controlled in software by the
control bit PSA (OPTION<3>). Clearing the PSA bit will
assign the prescaler to Timer0. The prescaler is not
readable or writable. When the prescaler is assigned to
the Timer0 module, prescale values of 1:2, 1:4, 1:256
are selectable. Section 6.2 “Prescaler” details the
operation of the prescaler.
A summary of registers associated with the Timer0
module is found in Table 6-1.
FIGURE 6-1: TIMER0 BLOCK DIAGRAM
FIGURE 6-2: TIMER0 TIMING: INTERNAL CLOCK/NO PRESCALE
Note 1: Bits T0CS, T0SE, PSA, PS2, PS1 and PS0 are located in the OPTION register.
2: The prescaler is shared with the Watchdog Timer (Figure 6-5).
0
1
1
0
T0CS(1)
FOSC/4
Programmable
Prescaler(2)
Sync with
Internal
Clocks
TMR0 Reg
PSOUT
(2 TCY delay)
PSOUT
Data Bus
8
PSA(1)
PS2, PS1, PS0(1)
3
Sync
T0SE
GP2/T0CKI
Pin
PC-1
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Instruction
Fetch
Timer0
PC PC + 1 PC + 2 PC + 3 PC + 4 PC + 6
T0 T0 + 1 T0 + 2 NT0 NT0 + 1 NT0 + 2
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
Write TMR0
executed
Read TMR0
reads NT0 Read TMR0
reads NT0 Read TMR0
reads NT0
Read TMR0
reads NT0 + 1 Read TMR0
reads NT0 + 2
Instruction
Executed
PC + 5
PC
(Program
Counter)
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FIGURE 6-3: TIMER0 TIMING: INTERNAL CLOCK/PRESCALE 1:2
TABLE 6-1: REGISTERS ASSOCIATED WITH TIMER0
6.1 Using Timer0 With An External
Clock
When an external clock input is used for Timer0, it must
meet certain requirements. The external clock require-
ment is due to internal phase clock (TOSC) synchroniza-
tion. Also, there is a delay in the actual incrementing of
Timer0 after synchronization.
6.1.1 EXTERNAL CLOCK
SYNCHRONIZATION
When no prescaler is used, the external clock input is
the same as the prescaler output. The synchronization
of T0CKI with the internal phase clocks is accom-
plished by sampling the prescaler output on the Q2 and
Q4 cycles of the internal phase clocks (Figure 6-4).
Therefore, it is necessary for T0CKI to be high for at
least 2T
OSC (and a small RC delay of 2Tt0H) and low
for at least 2T
OSC (and a small RC delay of 2Tt0H).
Refer to the electrical specification of the desired
device.
When a prescaler is used, the external clock input is
divided by the asynchronous ripple counter-type
prescaler, so that the prescaler output is symmetrical.
For the external clock to meet the sampling require-
ment, the ripple counter must be taken into account.
Therefore, it is necessary for T0CKI to have a period of
at least 4T
OSC (and a small RC delay of 4Tt0H) divided
by the prescaler value. The only requirement on T0CKI
high and low time is that they do not violate the
minimum pulse width requirement of Tt0H. Refer to
parameters 40, 41 and 42 in the electrical specification
of the desired device.
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
Power-On
Reset
Value on
All Other
Resets
01h TMR0 Timer0 – 8-Bit Real-Time Clock/Counter xxxx xxxx uuuu uuuu
N/A OPTION GPWU GPPU T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
N/A TRISGPIO(1) — — ——I/O Control Register ---- 1111 ---- 1111
Legend: Shaded cells not used by Timer0, – = unimplemented, x = unknown, u = unchanged.
Note 1: The TRIS of the T0CKI pin is overridden when T0CS = 1
PC-1
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Instruction
Fetch
Timer0
PC PC + 1 PC + 2 PC + 3 PC + 4 PC + 6
T0 T0 + 1 NT0 NT0 + 1
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
Write TMR0
executed
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0 + 1 Read TMR0
reads NT0 + 2
Instruction
Executed
PC + 5
PC
(Program
Counter)
2005-2013 Microchip Technology Inc. DS40001270F-page 27
PIC10F220/222
6.1.2 TIMER0 INCREMENT DELAY
Since the prescaler output is synchronized with the
internal clocks, there is a small delay from the time the
external clock edge occurs to the time the Timer0 mod-
ule is actually incremented. Figure 6-4 shows the delay
from the external clock edge to the timer incrementing.
FIGURE 6-4: TIMER0 TIMING WITH EXTERNAL CLOCK
6.2 Prescaler
An 8-bit counter is available as a prescaler for the
Timer0 module or as a postscaler for the Watchdog
Timer (WDT), respectively (see Section 8.6 “Watch-
dog Timer (WDT)”). For simplicity, this counter is
being referred to as “prescaler” throughout this data
sheet.
The PSA and PS<2:0> bits (OPTION<3:0>) determine
prescaler assignment and prescale ratio.
When assigned to the Timer0 module, all instructions
writing to the TMR0 register (e.g., CLRF 1,
MOVWF 1, BSF 1,x, etc.) will clear the prescaler.
When assigned to WDT, a CLRWDT instruction will clear
the prescaler along with the WDT. The prescaler is
neither readable nor writable. On a Reset, the
prescaler contains all ‘0’s.
Increment Timer0 (Q4)
External Clock Input or
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Timer0 T0 T0 + 1 T0 + 2
Small pulse
misses sampling
External Clock/Prescaler
Output After Sampling
(3)
Prescaler Output(2)
(1)
Note 1: Delay from clock input change to Timer0 increment is 3TOSC to 7TOSC. (Duration of Q = TOSC).
Therefore, the error in measuring the interval between two edges on Timer0 input = ±4TOSC max.
2: External clock if no prescaler selected; prescaler output otherwise.
3: The arrows indicate the points in time where sampling occurs.
Note: The prescaler may be used by either the
Timer0 module or the WDT, but not both.
Thus, a prescaler assignment for the
Timer0 module means that there is no
prescaler for the WDT and vice-versa.
PIC10F220/222
DS40001270F-page 28 2005-2013 Microchip Technology Inc.
6.2.1 SWITCHING PRESCALER
ASSIGNMENT
The prescaler assignment is fully under software
control (i.e., it can be changed “on-the-fly” during pro-
gram execution). To avoid an unintended device Reset,
the following instruction sequence (Example 6-1) must
be executed when changing the prescaler assignment
from Timer0 to the WDT.
EXAMPLE 6-1: CHANGING PRESCALER
(TIMER0 WDT)
To change prescaler from the WDT to the Timer0
module, use the sequence shown in Example 6-2. This
sequence must be used even if the WDT is disabled. A
CLRWDT instruction should be executed before
switching the prescaler.
EXAMPLE 6-2: CHANGING PRESCALER
(WDTTIMER0)
FIGURE 6-5: BLOCK DIAGRAM OF THE TIMER0/WDT PRESCALER
CLRWDT ;Clear WDT
CLRF TMR0 ;Clear TMR0 & Prescaler
MOVLW ‘00xx1111’b ;These 3 lines (5, 6, 7)
OPTION ;are required only if
;desired
CLRWDT ;PS<2:0> are 000 or 001
MOVLW ‘00xx1xxx’b ;Set Postscaler to
OPTION ;desired WDT rate
CLRWDT ;Clear WDT and
;prescaler
MOVLW ‘xxxx0xxx’ ;Select TMR0, new
;prescale value and
;clock source
OPTION
TCY (= FOSC/4)
Sync
2
Cycles
TMR0 Reg
8-bit Prescaler
8-to-1 MUX
M
MUX
Watchdog
Timer
PSA(1)
01
0
1
WDT
Time-Out
PS<2:0>(1)
8
PSA(1)
WDT Enable bit
0
1
0
1
Data Bus
8
PSA(1)
T0CS(1)
M
U
XM
U
X
U
X
T0SE(1)
GP2/T0CKI(2)
Pin
Note 1: T0CS, T0SE, PSA, PS<2:0> are bits in the OPTION register.
2: T0CKI is shared with pin GP2 on the PIC10F220/222.
2005-2013 Microchip Technology Inc. DS40001270F-page 29
PIC10F220/222
7.0 ANALOG-TO-DIGITAL (A/D)
CONVERTER
The A/D converter allows conversion of an analog
signal into an 8-bit digital signal.
7.1 Clock Divisors
The A/D Converter has a single clock source setting,
INTOSC/4. The A/D Converter requires 13 TAD periods
to complete a conversion. The divisor values do not
affect the number of TAD periods required to perform a
conversion. The divisor values determine the length of
the TAD period.
7.2 Voltage Reference
Due to the nature of the design, there is no external
voltage reference allowed for the A/D Converter.
The A/D Converter reference voltage will always be
VDD.
7.3 Analog Mode Selection
The ANS<1:0> bits are used to configure pins for ana-
log input. Upon any Reset ANS<1:0> defaults to 11.
This configures pins AN0 and AN1 as analog inputs.
Pins configured as analog inputs are not available for
digital output. Users should not change the ANS bits
while a conversion is in process. ANS bits are active
regardless of the condition of ADON.
7.4 A/D Converter Channel Selection
The CHS bits are used to select the analog channel to
be sampled by the A/D Converter. The CHS bits
should not be changed during a conversion. To
acquire an analog signal, the CHS selection must
match one of the pin(s) selected by the ANS bits. The
Internal Absolute Voltage Reference can be selected
regardless of the condition of the ANS bits. All channel
selection information will be lost when the device
enters Sleep.
7.5 The GO/DONE bit
The GO/DONE bit is used to determine the status of a
conversion, to start a conversion and to manually halt a
conversion in process. Setting the GO/DONE bit starts
a conversion. When the conversion is complete, the A/
D Converter module clears the GO/DONE bit. A con-
version can be terminated by manually clearing the
GO/DONE bit while a conversion is in process. Manual
termination of a conversion may result in a partially
converted result in ADRES.
The GO/DONE bit is cleared when the device enters
Sleep, stopping the current conversion. The A/D Con-
verter does not have a dedicated oscillator, it runs off of
the system clock.
The GO/DONE bit cannot be set when ADON is clear.
7.6 Sleep
This A/D Converter does not have a dedicated A/D
Converter clock and therefore no conversion in Sleep
is possible. If a conversion is underway and a Sleep
command is executed, the GO/DONE and ADON bit
will be cleared. This will stop any conversion in process
and power-down the A/D Converter module to con-
serve power. Due to the nature of the conversion pro-
cess, the ADRES may contain a partial conversion. At
least 1 bit must have been converted prior to Sleep to
have partial conversion data in ADRES. The CHS bits
are reset to their default condition and CHS<1:0> = 11.
For accurate conversions, T
AD must meet the following:
• 500 ns < TAD < 50 s
•TAD = 1/(FOSC/divisor)
TABLE 7-1: EFFECTS OF SLEEP AND WAKE ON ADCON0
Note: Due to the fixed clock divisor, a conversion
will complete in 13 CPU instruction cycles.
Note: The A/D Converter module consumes
power when the ADON bit is set even
when no channels are selected as analog
inputs. For low-power applications, it is
recommended that the ADON bit be
cleared when the A/D Converter is not in
use.
ANS1 ANS0 CHS1 CHS0 GO/DONE ADON
Prior to Sleep xxxx00
Prior to Sleep xxxx11
Entering Sleep Unchanged Unchanged 1100
Wake 111100
PIC10F220/222
DS40001270F-page 30 2005-2013 Microchip Technology Inc.
7.7 Analog Conversion Result
Register
The ADRES register contains the results of the last
conversion. These results are present during the sam-
pling period of the next analog conversion process.
After the sampling period is over, ADRES is cleared (=
0). A ‘leading one’ is then right shifted into the ADRES
to serve as an internal conversion complete bit. As
each bit weight, starting with the MSb, is converted, the
leading one is shifted right and the converted bit is
stuffed into ADRES. After a total of 9 right shifts of the
‘leading one’ have taken place, the conversion is com-
plete; the ‘leading one’ has been shifted out and the
GO/DONE bit is cleared.
If the GO/DONE bit is cleared in software during a con-
version, the conversion stops. The data in ADRES is
the partial conversion result. This data is valid for the bit
weights that have been converted. The position of the
‘leading one’ determines the number of bits that have
been converted. The bits that were not converted
before the GO/DONE was cleared are unrecoverable.
7.8 Internal Absolute Voltage
Reference
The function of the Internal Absolute Voltage Refer-
ence is to provide a constant voltage for conversion
across the devices VDD supply range. The A/D Con-
verter is ratiometric with the conversion reference
voltage being VDD. Converting a constant voltage of
0.6V (typical) will result in a result based on the voltage
applied to VDD of the device. The result of conversion
of this reference across the VDD range can be
approximated by: Conversion Result = 0.6V/(VDD/256)
Note: The actual value of the Absolute Voltage
Reference varies with temperature and
part-to-part variation. The conversion is
also susceptible to analog noise on the
VDD pin and noise generated by the sink-
ing or sourcing of current on the I/O pins.
REGISTER 7-1: ADCON0: A/D CONVERTER 0 REGISTER
R/W-1 R/W-1 U-0 U-0 R/W-1 R/W-1 R/W-0 R/W-0
ANS1 ANS0 —— CHS1 CHS0 GO/DONE ADON
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 ANS1: ADC Analog Input Pin Select bit
1 = GP1/AN1 configured for analog input
0 = GP1/AN1 configured as digital I/O
bit 6 ANS0: ADC Analog Input Pin Select bit(1), (2)
1 = GP0/AN0 configured as an analog input
0 = GP0/AN0 configured as digital I/O
bit 5-4 Unimplemented: Read as ‘0’
bit 3-2 CHS<1:0>: ADC Channel Select bits(3)
00 = Channel 00 (GP0/AN0)
01 = Channel 01 (GP1/AN1)
1X = 0.6V absolute Voltage reference
bit 1 GO/DONE: ADC Conversion Status bit(4)
1 = ADC conversion in progress. Setting this bit starts an ADC conversion cycle. This bit is automatically cleared
by hardware when the ADC is done converting.
0 = ADC conversion completed/not in progress. Manually clearing this bit while a conversion is in process
terminates the current conversion.
bit 0 ADON: ADC Enable bit
1 = ADC module is operating
0 = ADC module is shut-off and consumes no power
Note 1: When the ANS bits are set, the channel(s) selected are automatically forced into analog mode regardless of the pin
function previously defined.
2: The ANS<1:0> bits are active regardless of the condition of ADON
3: CHS<1:0> bits default to 11 after any Reset.
4: If the ADON bit is clear, the GO/DONE bit cannot be set.
2005-2013 Microchip Technology Inc. DS40001270F-page 31
PIC10F220/222
REGISTER 7-2: ADRES: ANALOG CONVERSION RESULT REGISTER
R-X R-X R-X R-X R-X R-X R-X R-X
ADRES7 ADRES6 ADRES5 ADRES4 ADRES3 ADRES2 ADRES1 ADRES0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 ADRES<7:0>
PIC10F220/222
DS40001270F-page 32 2005-2013 Microchip Technology Inc.
7.9 A/D Acquisition Requirements
For the ADC to meet its specified accuracy, the charge
holding capacitor (CHOLD) must be allowed to fully
charge to the input channel voltage level. The Analog
Input model is shown in Figure 7-1. The source
impedance (RS) and the internal sampling switch (RSS)
impedance directly affect the time required to charge the
capacitor CHOLD. The sampling switch (RSS) impedance
varies over the device voltage (VDD), see Figure 7-1.
The maximum recommended impedance for analog
sources is 10 k. As the source impedance is
decreased, the acquisition time may be decreased.
After the analog input channel is selected (or changed),
an A/D acquisition must be done before the conversion
can be started. To calculate the minimum acquisition
time, Equation 7-1 may be used. This equation
assumes that 1/2 LSb error is used (256 steps for the
ADC). The 1/2 LSb error is the maximum error allowed
for the ADC to meet its specified resolution.
EQUATION 7-1: ACQUISITION TIME EXAMPLE
FIGURE 7-1: ANALOG INPUT MODULE
Note 1: The charge holding capacitor (CHOLD) is not discharged after each conversion.
2: The maximum recommended impedance for analog sources is 10 k. This is required to meet the pin
leakage specification.
Assumptions:
Temperature = 50°C and external impedance of 10 k
5.0V VDD
Tacq = Amplifier Settling Time + Hold Capacitor Charging Time + Temperature Coefficient
=T
AMP + TC + TCOFF
=2
s + TC + [(Temperature - 25°C)(0.05
s/°C)]
Solving for Tc:
Tc = CHOLD (RIC + RSS + RS) In(1/512)
= -25pF (l k
+ 7 k
+ 10 k
) In(0.00196)
=2.81
s
Therefore:
Tacq = 2
s + 2.81
s + [(50°C-25°C)(0.0 5
s/°C)]
=6.06
s
CPIN
VA
Rs ANx
5 pF
VDD
VT = 0.6V
VT = 0.6V I LEAKAGE
RIC 1k
Sampling
Switch
SS Rss
CHOLD = 25 pF
VSS/VREF-
6V
Sampling Switch
5V
4V
3V
2V
567891011
(k)
VDD
± 500 nA
RSS
Legend: CPIN = Input Capacitance
VT= Threshold Voltage
ILEAKAGE = Leakage current at the pin due
to various junctions
RIC = Interconnect Resistance
SS = Sampling Switch
CHOLD = Sample/Hold Capacitance
2005-2013 Microchip Technology Inc. DS40001270F-page 33
PIC10F220/222
8.0 SPECIAL FEATURES OF THE
CPU
What sets a microcontroller apart from other proces-
sors are special circuits that deal with the needs of real-
time applications. The PIC10F220/222 microcontrol-
lers have a host of such features intended to maximize
system reliability, minimize cost through elimination of
external components, provide power-saving operating
modes and offer code protection. These features are:
• Reset:
- Power-on Reset (POR)
- Device Reset Timer (DRT)
- Watchdog Timer (WDT)
- Wake-up from Sleep on pin change
• Sleep
• Code Protection
• ID Locations
• In-Circuit Serial Programming™
•Clock Out
The PIC10F220/222 devices have a Watchdog Timer,
which can be shut off only through Configuration bit
WDTE. It runs off of its own RC oscillator for added reli-
ability. When using DRT, there is an 1.125 ms (typical)
delay only on VDD power-up. With this timer on-chip,
most applications need no external Reset circuitry.
The Sleep mode is designed to offer a very low current
Power-Down mode. The user can wake-up from Sleep
through a change on input pins or through a Watchdog
Timer time-out.
8.1 Configuration Bits
The PIC10F220/222 Configuration Words consist of 12
bits. Configuration bits can be programmed to select
various device configurations. One bit is the Watchdog
Timer enable bit, one bit is the MCLR enable bit and
one bit is for code protection (see Register 8-1).
REGISTER 8-1: CONFIG: CONFIGURATION WORD(1)
— — — — — — — MCLRE CP WDTE MCPU IOSCFS
bit 11 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 11-5 Unimplemented: Read as ‘0’
bit 4 MCLRE: GP3/MCLR Pin Function Select bit
1 = GP3/MCLR pin function is MCLR
0 = GP3/MCLR pin function is digital I/O, MCLR internally tied to VDD
bit 3 CP: Code Protection bit
1 = Code protection off
0 = Code protection on
bit 2 WDTE: Watchdog Timer Enable bit
1 = WDT enabled
0 = WDT disabled
bit 1 MCPU: Master Clear Pull-up Enable bit(2)
1 = Pull-up disabled
0 = Pull-up enabled
bit 0 IOSCFS: Internal Oscillator Frequency Select bit
1 = 8 MHz
0 = 4 MHz
Note 1: Refer to the “PIC10F220/222 Memory Programming Specification” (DS41266), to determine how to
access the Configuration Word. The Configuration Word is not user addressable during device operation.
2: MCLRE must be a ‘1’ to enable this selection.
PIC10F220/222
DS40001270F-page 34 2005-2013 Microchip Technology Inc.
8.2 Oscillator Configurations
8.2.1 OSCILLATOR TYPES
The PIC10F220/222 devices are offered with internal
oscillator mode only.
• INTOSC: Internal 4/8 MHz Oscillator
8.2.2 INTERNAL 4/8 MHz OSCILLATOR
The internal oscillator provides a 4/8 MHz (nominal)
system clock (see Section 10.0 “Electrical Charac-
teristics” for information on variation over voltage and
temperature).
In addition, a calibration instruction is programmed into
the last address of memory, which contains the calibra-
tion value for the internal oscillator. This location is
always uncode protected, regardless of the code-pro-
tect settings. This value is programmed as a MOVLW XX
instruction where XX is the calibration value and is
placed at the Reset vector. This will load the W register
with the calibration value upon Reset and the PC will
then roll over to the users program at address 0x000.
The user then has the option of writing the value to the
OSCCAL Register (05h) or ignoring it.
OSCCAL, when written to with the calibration value, will
“trim” the internal oscillator to remove process variation
from the oscillator frequency.
8.3 Reset
The device differentiates between various kinds of
Reset:
• Power-on Reset (POR)
•MCLR
Reset during normal operation
•MCLR
Reset during Sleep
• WDT Time-out Reset during normal operation
• WDT Time-out Reset during Sleep
• Wake-up from Sleep on pin change
Some registers are not reset in any way, they are
unknown on POR and unchanged in any other Reset.
Most other registers are reset to “Reset state” on
Power-on Reset (POR), MCLR, WDT or Wake-up on
pin change Reset during normal operation. They are
not affected by a WDT Reset during Sleep or MCLR
Reset during Sleep, since these Resets are viewed as
resumption of normal operation. The exceptions to this
are TO, PD and GPWUF bits. They are set or cleared
differently in different Reset situations. These bits are
used in software to determine the nature of Reset. See
Table 8-1 for a full description of Reset states of all
registers.
TABLE 8-1: RESET CONDITIONS FOR REGISTERS – PIC10F220/222
Note: Erasing the device will also erase the pre-
programmed internal calibration value for
the internal oscillator. The calibration
value must be read prior to erasing the
part so it can be reprogrammed correctly
later.
Register Address Power-on Reset MCLR Reset, WDT Time-out, Wake-up On Pin Change,
W—qqqq qqqu(1) qqqq qqqu(1)
INDF 00h xxxx xxxx uuuu uuuu
TMR0 01h xxxx xxxx uuuu uuuu
PC 02h 1111 1111 1111 1111
STATUS 03h 0--1 1xxx q00q quuu
FSR 04h 111x xxxx 111u uuuu
OSCCAL 05h 1111 1110 uuuu uuuu
GPIO 06h ---- xxxx ---- uuuu
ADCON0 07h 11-- 1100 11-- 1100
ADRES 08h xxxx xxxx uuuu uuuu
OPTION — 1111 1111 1111 1111
TRIS — ---- 1111 ---- 1111
Legend: u = unchanged, x = unknown, – = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: Bits <7:2> of W register contain oscillator calibration values due to MOVLW XX instruction at top of memory.
2005-2013 Microchip Technology Inc. DS40001270F-page 35
PIC10F220/222
TABLE 8-2: RESET CONDITION FOR SPECIAL REGISTERS
8.3.1 MCLR ENABLE
This Configuration bit, when unprogrammed (left in the
‘1’ state), enables the external MCLR function. When
programmed, the MCLR function is tied to the internal
VDD and the pin is assigned to be a I/O. See Figure 8-1.
FIGURE 8-1: MCLR SELECT
8.4 Power-on Reset (POR)
The PIC10F220/222 devices incorporate an on-chip
Power-on Reset (POR) circuitry, which provides an
internal chip Reset for most power-up situations.
The on-chip POR circuit holds the chip in Reset until
VDD has reached a high enough level for proper oper-
ation. To take advantage of the internal POR, program
the GP3/MCLR/VPP pin as MCLR and tie through a
resistor to VDD, or program the pin as GP3. An internal
weak pull-up resistor is implemented using a transistor
(refer to Table 10-1 for the pull-up resistor ranges). This
will eliminate external RC components usually needed
to create a Power-on Reset.
When the devices start normal operation (exit the
Reset condition), device operating parameters (volt-
age, frequency, temperature,...) must be met to ensure
operation. If these conditions are not met, the devices
must be held in Reset until the operating parameters
are met.
A simplified block diagram of the on-chip Power-on
Reset circuit is shown in Figure 8-2.
The Power-on Reset circuit and the Device Reset
Timer (see Section 8.5 “Device Reset Timer (DRT)”)
circuit are closely related. On power-up, the Reset latch
is set and the DRT is reset. The DRT timer begins
counting once it detects MCLR to be high. After the
time-out period, which is typically 1.125 ms, it will reset
the Reset latch and thus end the on-chip Reset signal.
A power-up example where MCLR is held low is shown
in Figure 8-3. VDD is allowed to rise and stabilize before
bringing MCLR high. The chip will actually come out of
Reset TDRT msec after MCLR goes high.
In Figure 8-4, the on-chip Power-on Reset feature is
being used (MCLR and VDD are tied together or the pin
is programmed to be GP3). The VDD is stable before
the Start-up timer times out and there is no problem in
getting a proper Reset. However, Figure 8-5 depicts a
problem situation where VDD rises too slowly. The time
between when the DRT senses that MCLR is high and
when MCLR and VDD actually reach their full value, is
too long. In this situation, when the start-up timer times
out, VDD has not reached the VDD (min) value and the
chip may not function correctly. For such situations, we
recommend that external RC circuits be used to
achieve longer POR delay times (Figure 8-4).
For additional information on design considerations
related to the use of PIC10F220/222 devices with their
short device Reset timer, refer to Application Notes
AN522, “Power-Up Considerations” (DS00522) and
AN607, “Power-up Trouble Shooting” (DS00607).
STATUS Addr: 03h PCL Addr: 02h
Power-on Reset 0--1 1xxx 1111 1111
MCLR Reset during normal operation 0--u uuuu 1111 1111
MCLR Reset during Sleep 0--1 0uuu 1111 1111
WDT Reset during Sleep 0--0 0uuu 1111 1111
WDT Reset normal operation 0--0 uuuu 1111 1111
Wake-up from Sleep on pin change 1--1 0uuu 1111 1111
Legend: u = unchanged, x = unknown, – = unimplemented bit, read as ‘0’.
GP3/MCLR/VPP
MCLRE Internal MCLR
GPWU Weak Pull-up
Note: When the devices start normal operation
(exit the Reset condition), device operat-
ing parameters (voltage, frequency, tem-
perature, etc.) must be met to ensure
proper operation. If these conditions are
not met, the device must be held in Reset
until the operating conditions are met.
PIC10F220/222
DS40001270F-page 36 2005-2013 Microchip Technology Inc.
FIGURE 8-2: SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
FIGURE 8-3: TIME-OUT SEQUENCE ON POWER-UP (MCLR PULLED LOW)
FIGURE 8-4: TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): FAST VDD RISE
TIME
SQ
RQ
VDD
GP3/MCLR/VPP
Power-up
Detect POR (Power-on
WDT Reset CHIP Reset
MCLRE
Wake-up on pin Change Reset
Start-up Timer
WDT Time-out
Pin Change
Sleep
MCLR Reset
1.125 ms
Reset)
VDD
MCLR
Internal POR
DRT Time-out
Internal Reset
TDRT
VDD
MCLR
Internal POR
DRT Time-out
Internal Reset
TDRT
2005-2013 Microchip Technology Inc. DS40001270F-page 37
PIC10F220/222
FIGURE 8-5: TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): SLOW VDD RISE
TIME
VDD
MCLR
Internal POR
DRT Time-out
Internal Reset
TDRT
V1
Note: When VDD rises slowly, the TDRT time-out expires long before VDD has reached its final
value. In this example, the chip will reset properly if, and only if, V1 VDD min.
PIC10F220/222
DS40001270F-page 38 2005-2013 Microchip Technology Inc.
8.5 Device Reset Timer (DRT)
On the PIC10F220/222 devices, the DRT runs any time
the device is powered up.
The DRT operates on an internal oscillator. The pro-
cessor is kept in Reset as long as the DRT is active.
The DRT delay allows VDD to rise above VDD min. and
for the oscillator to stabilize.
The on-chip DRT keeps the devices in a Reset condi-
tion for approximately 1.125 ms after MCLR has
reached a logic high (VIH MCLR) level. Programming
GP3/MCLR/VPP as MCLR and using an external RC
network connected to the MCLR input is not required in
most cases. This allows savings in cost-sensitive and/
or space restricted applications, as well as allowing the
use of the GP3/MCLR/VPP pin as a general purpose
input.
The Device Reset Time delays will vary from chip-to-
chip due to VDD, temperature and process variation.
See AC parameters for details.
Reset sources are POR, MCLR, WDT time-out and
wake-up on pin change. See Section 8.9.2 “Wake-up
from Sleep”, Notes 1, 2 and 3.
TABLE 8-3: DRT (DEVICE RESET TIMER
PERIOD)
8.6 Watchdog Timer (WDT)
The Watchdog Timer (WDT) is a free running on-chip
RC oscillator, which does not require any external
components. This RC oscillator is separate from the
internal 4/8 MHz oscillator. This means that the WDT
will run even if the main processor clock has been
stopped, for example, by execution of a SLEEP instruc-
tion. During normal operation or Sleep, a WDT Reset or
wake-up Reset, generates a device Reset.
The TO bit (STATUS<4>) will be cleared upon a
Watchdog Timer Reset.
The WDT can be permanently disabled by program-
ming the configuration WDTE as a ‘0’ (see Section 8.1
“Configuration Bits”). Refer to the PIC10F220/222
Programming Specification to determine how to access
the Configuration Word.
8.6.1 WDT PERIOD
The WDT has a nominal time-out period of 18 ms, (with
no prescaler). If a longer time-out period is desired, a
prescaler with a division ratio of up to 1:128 can be
assigned to the WDT (under software control) by writ-
ing to the OPTION register. Thus, a time-out period of
a nominal 2.3 seconds can be realized. These periods
vary with temperature, VDD and part-to-part process
variations (see DC specs).
Under worst-case conditions (VDD = Min., Temperature
= Max., max. WDT prescaler), it may take several
seconds before a WDT time-out occurs.
8.6.2 WDT PROGRAMMING
CONSIDERATIONS
The CLRWDT instruction clears the WDT and the
postscaler, if assigned to the WDT, and prevents it from
timing out and generating a device Reset.
The SLEEP instruction resets the WDT and the
postscaler, if assigned to the WDT. This gives the
maximum Sleep time before a WDT wake-up Reset.
POR Reset Subsequent Resets
1.125 ms (typical) 10 s (typical)
2005-2013 Microchip Technology Inc. DS40001270F-page 39
PIC10F220/222
FIGURE 8-6: WATCHDOG TIMER BLOCK DIAGRAM
TABLE 8-4: SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
8.7 Time-out Sequence, Power-down
and Wake-up from Sleep Status
Bits (TO/PD/GPWUF/CWUF)
The TO, PD and GPWUF bits in the STATUS register
can be tested to determine if a Reset condition has
been caused by a Power-up condition, a MCLR,
Watchdog Timer (WDT) Reset or wake-up on pin
change.
TABLE 8-5: TO/PD/GPWUF STATUS AFTER RESET
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
Power-On
Reset
Value on
All Other
Resets
N/A OPTION GPWU GPPU T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
Legend: Shaded boxes = Not used by Watchdog Timer, – = unimplemented, read as ‘0’, u = unchanged.
(Figure 6-5)
Postscaler
Note 1: T0CS, T0SE, PSA, PS<2:0> are bits in the OPTION register.
WDT Time-out
Watchdog
Timer
From Timer0 Clock Source
WDT Enable
Configuration
Bit
PSA
Postscaler
8-to-1 MUX PS<2:0>
(Figure 6-4)
To Timer0
0
1M
U
X
1
0
PSA
MUX
3
GPWUF TO PD Reset Caused By
000WDT wake-up from Sleep
00uWDT time-out (not from Sleep)
010MCLR wake-up from Sleep
011Power-up
0uuMCLR not during Sleep
110Wake-up from Sleep on pin change
Legend: u = unchanged, x = unknown, – = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: The TO, PD and GPWUF bits maintain their status (u) until a Reset occurs. A low-pulse on the MCLR
input does not change the TO, PD or GPWUF Status bits.
PIC10F220/222
DS40001270F-page 40 2005-2013 Microchip Technology Inc.
8.8 Reset on Brown-out
A Brown-out is a condition where device power (VDD)
dips below its minimum value, but not to zero, and then
recovers. The device should be reset in the event of a
Brown-out.
To reset PIC10F220/222 devices when a Brown-out
occurs, external Brown-out protection circuits may be
built, as shown in Figure 8-7 and Figure 8-8.
FIGURE 8-7: BROWN-OUT
PROTECTION CIRCUIT 1
FIGURE 8-8: BROWN-OUT
PROTECTION CIRCUIT 2
FIGURE 8-9: BROWN-OUT
PROTECTION CIRCUIT 3
8.9 Power-down Mode (Sleep)
A device may be powered down (Sleep) and later
powered up (wake-up from Sleep).
8.9.1 SLEEP
The Power-Down mode is entered by executing a
SLEEP instruction.
If enabled, the Watchdog Timer will be cleared but
keeps running, the TO bit (STATUS<4>) is set, the PD
bit (STATUS<3>) is cleared and the oscillator driver is
turned off. The I/O ports maintain the status they had
before the SLEEP instruction was executed (driving
high, driving low or high-impedance).
For lowest current consumption while powered down,
the T0CKI input should be at VDD or VSS and the GP3/
MCLR/VPP pin must be at a logic high level if MCLR is
enabled.
Note 1: This circuit will activate Reset when VDD goes
below Vz + 0.7V (where Vz = Zener voltage).
2: Pin must be configured as MCLR.
33k
10k
40k(1)
VDD
MCLR(2) PIC10F22X
VDD
Q1
Note 1: This brown-out circuit is less expensive,
although less accurate. Transistor Q1 turns
off when VDD is below a certain level such
that:
2: Pin must be configured as MCLR.
VDD •
R1
R1 + R2
= 0.7V
R2 40k(1)
VDD
MCLR(2) PIC10F22X
R1
Q1
VDD
Note: A Reset generated by a WDT time-out
does not drive the MCLR pin low.
Note 1: This Brown-out Protection circuit employs
Microchip Technology’s MCP809 micro-
controller supervisor. There are 7 different
trip point selections to accommodate 5V to
3V systems.
2: Pin must be configured as MCLR.
MCLR(2)
PIC10F22X
VDD
VDD
VSS
RST
MCP809
VDD
Bypass
Capacitor
2005-2013 Microchip Technology Inc. DS40001270F-page 41
PIC10F220/222
8.9.2 WAKE-UP FROM SLEEP
The device can wake-up from Sleep through one of the
following events:
1. An external Reset input on GP3/MCLR/VPP pin,
when configured as MCLR.
2. A Watchdog Timer Time-out Reset (if WDT was
enabled).
3. A change on input pin GP0, GP1 or GP3 when
wake-up on change is enabled.
These events cause a device Reset. The TO, PD
GPWUF bits can be used to determine the cause of a
device Reset. The TO bit is cleared if a WDT time-out
occurred (and caused wake-up). The PD bit, which is
set on power-up, is cleared when SLEEP is invoked.
The GPWUF bit indicates a change in state while in
Sleep at pins GP0, GP1 or GP3 (since the last file or bit
operation on GP port).
8.10 Program Verification/Code
Protection
If the Code Protection bit has not been programmed,
the on-chip program memory can be read out for
verification purposes.
The first 64 locations and the last location (Reset
Vector) can be read, regardless of the code protection
bit setting.
8.11 ID Locations
Four memory locations are designated as ID locations
where the user can store checksum or other code
identification numbers. These locations are not
accessible during normal execution, but are readable
and writable during program/verify.
Use only the lower 4 bits of the ID locations and always
program the upper 8 bits as ‘1’s.
8.12 In-Circuit Serial Programming™
The PIC10F220/222 microcontrollers can be serially
programmed while in the end application circuit. This is
simply done with two lines for clock and data, and three
other lines for power, ground and the programming
voltage. This allows customers to manufacture boards
with unprogrammed devices and then program the
microcontroller just before shipping the product. This
also allows the most recent firmware, or a custom
firmware, to be programmed.
The devices are placed into a Program/Verify mode by
holding the GP1 and GP0 pins low while raising the
MCLR (VPP) pin from VIL to VIHH (see programming
specification). GP1 becomes the programming clock
and GP0 becomes the programming data. Both GP1
and GP0 are Schmitt Trigger inputs in this mode.
After Reset, a 6-bit command is then supplied to the
device. Depending on the command, 16 bits of program
data are then supplied to or from the device, depending
if the command was a Load or a Read. For complete
details of serial programming, please refer to the
PIC10F220/222 Programming Specifications.
A typical In-Circuit Serial Programming connection is
shown in Figure 8-10.
FIGURE 8-10: TYPICAL IN-CIRCUIT
SERIAL
PROGRAMMING™
CONNECTION
Caution: Right before entering Sleep, read the
input pins. When in Sleep, wake up
occurs when the values at the pins
change from the state they were in at the
last reading. If a wake-up on change
occurs and the pins are not read before
re-entering Sleep, a wake-up will occur
immediately even if no pins change
while in Sleep mode.
Note: The WDT is cleared when the device
wakes from Sleep, regardless of the wake-
up source.
External
Connector
Signals
To N or ma l
Connections
To N or ma l
Connections
PIC10F22X
VDD
VSS
MCLR/VPP
GP1
GP0
+5V
0V
VPP
CLK
Data I/O
VDD
PIC10F220/222
DS40001270F-page 42 2005-2013 Microchip Technology Inc.
NOTES:
2005-2013 Microchip Technology Inc. DS40001270F-page 43
PIC10F220/222
9.0 INSTRUCTION SET SUMMARY
The PIC16 instruction set is highly orthogonal and is
comprised of three basic categories.
•Byte-oriented operations
•Bit-oriented operations
•Literal and control operations
Each PIC16 instruction is a 12-bit word divided into an
opcode, which specifies the instruction type, and one
or more operands which further specify the operation
of the instruction. The formats for each of the catego-
ries is presented in Figure 9-1, while the various
opcode fields are summarized in Table 9-1.
For byte-oriented instructions, ‘f’ represents a file reg-
ister designator and ‘d’ represents a destination desig-
nator. The file register designator specifies which file
register is to be used by the instruction.
The destination designator specifies where the result of
the operation is to be placed. If ‘d’ is ‘0’, the result is
placed in the W register. If ‘d’ is ‘1’, the result is placed
in the file register specified in the instruction.
For bit-oriented instructions, ‘b’ represents a bit field
designator which selects the number of the bit affected
by the operation, while ‘f’ represents the number of the
file in which the bit is located.
For literal and control operations, ‘k’ represents an
8 or 9-bit constant or literal value.
TABLE 9-1: OPCODE FIELD
DESCRIPTIONS
All instructions are executed within a single instruction
cycle, unless a conditional test is true or the program
counter is changed as a result of an instruction. In this
case, the execution takes two instruction cycles. One
instruction cycle consists of four oscillator periods.
Thus, for an oscillator frequency of 4 MHz, the normal
instruction execution time is 1 s. If a conditional test is
true or the program counter is changed as a result of an
instruction, the instruction execution time is 2 s.
Figure 9-1 shows the three general formats that the
instructions can have. All examples in the figure use
the following format to represent a hexadecimal
number:
‘0xhhh’
where ‘h’ signifies a hexadecimal digit.
FIGURE 9-1: GENERAL FORMAT FOR
INSTRUCTIONS
Field Description
f Register file address (0x00 to 0x7F)
W Working register (accumulator)
b Bit address within an 8-bit file register
k Literal field, constant data or label
x Don’t care location (= 0 or 1)
The assembler will generate code with x = 0. It is the
recommended form of use for compatibility with all
Microchip software tools.
d Destination select;
d = 0 (store result in W)
d = 1 (store result in file register ‘f’)
Default is d = 1
label Label name
TOS Top-of-Stack
PC Program Counter
WDT Watchdog Timer counter
TO Time-out bit
PD Power-down bit
dest Destination, either the W register or the specified
register file location
[ ] Options
( ) Contents
Assigned to
< > Register bit field
In the set of
italics User defined term (font is courier)
Byte-oriented file register operations
11 6 5 4 0
d = 0 for destination W
OPCODE d f (FILE #)
d = 1 for destination f
f = 5-bit file register address
Bit-oriented file register operations
11 8 7 5 4 0
OPCODE b (BIT #) f (FILE #)
b = 3-bit address
f = 5-bit file register address
Literal and control operations (except GOTO)
11 8 7 0
OPCODE k (literal)
k = 8-bit immediate value
Literal and control operations – GOTO instruction
11 9 8 0
OPCODE k (literal)
k = 9-bit immediate value
PIC10F220/222
DS40001270F-page 44 2005-2013 Microchip Technology Inc.
TABLE 9-2: INSTRUCTION SET SUMMARY
Mnemonic,
Operands Description Cycles 12-Bit Opcode Status
Affected Notes
MSb LSb
ADDWF
ANDWF
CLRF
CLRW
COMF
DECF
DECFSZ
INCF
INCFSZ
IORWF
MOVF
MOVWF
NOP
RLF
RRF
SUBWF
SWAPF
XORWF
f, d
f, d
f
–
f, d
f, d
f, d
f, d
f, d
f, d
f, d
f
–
f, d
f, d
f, d
f, d
f, d
Add W and f
AND W with f
Clear f
Clear W
Complement f
Decrement f
Decrement f, Skip if 0
Increment f
Increment f, Skip if 0
Inclusive OR W with f
Move f
Move W to f
No Operation
Rotate left f through Carry
Rotate right f through Carry
Subtract W from f
Swap f
Exclusive OR W with f
1
1
1
1
1
1
1(2)
1
1(2)
1
1
1
1
1
1
1
1
1
0001
0001
0000
0000
0010
0000
0010
0010
0011
0001
0010
0000
0000
0011
0011
0000
0011
0001
11df
01df
011f
0100
01df
11df
11df
10df
11df
00df
00df
001f
0000
01df
00df
10df
10df
10df
ffff
ffff
ffff
0000
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
0000
ffff
ffff
ffff
ffff
ffff
C,DC,Z
Z
Z
Z
Z
Z
None
Z
None
Z
Z
None
None
C
C
C,DC,Z
None
Z
1,2,4
2,4
4
2,4
2,4
2,4
2,4
2,4
2,4
1,4
2,4
2,4
1,2,4
2,4
2,4
BIT-ORIENTED FILE REGISTER OPERATIONS
BCF
BSF
BTFSC
BTFSS
f, b
f, b
f, b
f, b
Bit Clear f
Bit Set f
Bit Test f, Skip if Clear
Bit Test f, Skip if Set
1
1
1(2)
1(2)
0100
0101
0110
0111
bbbf
bbbf
bbbf
bbbf
ffff
ffff
ffff
ffff
None
None
None
None
2,4
2,4
LITERAL AND CONTROL OPERATIONS
ANDLW
CALL
CLRWDT
GOTO
IORLW
MOVLW
OPTION
RETLW
SLEEP
TRIS
XORLW
k
k
k
k
k
k
–
k
–
f
k
AND literal with W
Call subroutine
Clear Watchdog Timer
Unconditional branch
Inclusive OR Literal with W
Move Literal to W
Load OPTION register
Return, place Literal in W
Go into standby mode
Load TRIS register
Exclusive OR Literal to W
1
2
1
2
1
1
1
2
1
1
1
1110
1001
0000
101k
1101
1100
0000
1000
0000
0000
1111
kkkk
kkkk
0000
kkkk
kkkk
kkkk
0000
kkkk
0000
0000
kkkk
kkkk
kkkk
0100
kkkk
kkkk
kkkk
0010
kkkk
0011
0fff
kkkk
Z
None
TO, PD
None
Z
None
None
None
TO, PD
None
Z
1
3
Note 1: The 9th bit of the program counter will be forced to a ‘0’ by any instruction that writes to the PC except for
GOTO. See Section 4.7 “Program Counter”.
2: When an I/O register is modified as a function of itself (e.g., MOVF PORTB, 1), the value used will be that
value present on the pins themselves. For example, if the data latch is ‘1’ for a pin configured as input and
is driven low by an external device, the data will be written back with a ‘0’.
3: The instruction TRIS f, where f = 6 causes the contents of the W register to be written to the tri-state
latches of PORTB. A ‘1’ forces the pin to a high-impedance state and disables the output buffers.
4: If this instruction is executed on the TMR0 register (and, where applicable, d = 1), the prescaler will be
cleared (if assigned to TMR0).
2005-2013 Microchip Technology Inc. DS40001270F-page 45
PIC10F220/222
9.1 Instruction Description
ADDWF Add W and f
Syntax: [ label ] ADDWF f,d
Operands: 0 f 31
d
Operation: (W) + (f) (destination)
Status Affected: C, DC, Z
Description: Add the contents of the W register
and register ‘f’. If ‘d’ is ‘0’, the result
is stored in the W register. If ‘d’ is
‘1’, the result is stored back in
register ‘f’.
ANDLW AND literal with W
Syntax: [ label ] ANDLW k
Operands: 0 k 255
Operation: (W).AND. (k) (W)
Status Affected: Z
Description: The contents of the W register are
AND’ed with the eight-bit literal ‘k’.
The result is placed in the W
register.
ANDWF AND W with f
Syntax: [ label ] ANDWF f,d
Operands: 0 f 31
d [0,1]
Operation: (W) AND (f) (destination)
Status Affected: Z
Description: The contents of the W register are
AND’ed with register ‘f’. If ‘d’ is ‘0’,
the result is stored in the W register.
If ‘d’ is ‘1’, the result is stored back
in register ‘f’.
BCF Bit Clear f
Syntax: [ label ] BCF f,b
Operands: 0 f 31
0 b 7
Operation: 0 (f<b>)
Status Affected: None
Description: Bit ‘b’ in register ‘f’ is cleared.
BSF Bit Set f
Syntax: [ label ] BSF f,b
Operands: 0 f 31
0 b 7
Operation: 1 (f<b>)
Status Affected: None
Description: Bit ‘b’ in register ‘f’ is set.
BTFSC Bit Test f, Skip if Clear
Syntax: [ label ] BTFSC f,b
Operands: 0 f 31
0 b 7
Operation: skip if (f<b>) = 0
Status Affected: None
Description: If bit ‘b’ in register ‘f’ is ‘0’, then the
next instruction is skipped.
If bit ‘b’ is ‘0’, then the next instruc-
tion fetched during the current
instruction execution is discarded,
and a NOP is executed instead,
making this a two-cycle instruction.
PIC10F220/222
DS40001270F-page 46 2005-2013 Microchip Technology Inc.
BTFSS Bit Test f, Skip if Set
Syntax: [ label ] BTFSS f,b
Operands: 0 f 31
0 b < 7
Operation: skip if (f<b>) = 1
Status Affected: None
Description: If bit ‘b’ in register ‘f’ is ‘1’, then the
next instruction is skipped.
If bit ‘b’ is ‘1’, then the next instruc-
tion fetched during the current
instruction execution, is discarded
and a NOP is executed instead,
making this a two-cycle instruction.
CALL Subroutine Call
Syntax: [ label ] CALL k
Operands: 0 k 255
Operation: (PC) + 1 Top of Stack;
k PC<7:0>;
(Status<6:5>) PC<10:9>;
0 PC<8>
Status Affected: None
Description: Subroutine call. First, return
address (PC + 1) is pushed onto
the stack. The eight-bit immediate
address is loaded into PC bits
<7:0>. The upper bits PC<10:9>
are loaded from STATUS<6:5>,
PC<8> is cleared. CALL is a two-
cycle instruction.
CLRF Clear f
Syntax: [ label ] CLRF f
Operands: 0 f 31
Operation: 00h (f);
1 Z
Status Affected: Z
Description: The contents of register ‘f’ are
cleared and the Z bit is set.
CLRW Clear W
Syntax: [ label ] CLRW
Operands: None
Operation: 00h (W);
1 Z
Status Affected: Z
Description: The W register is cleared. Zero bit
(Z) is set.
CLRWDT Clear Watchdog Timer
Syntax: [ label ] CLRWDT k
Operands: None
Operation: 00h WDT;
0 WDT prescaler (if assigned);
1 TO;
1 PD
Status Affected: TO, PD
Description: The CLRWDT instruction resets the
WDT. It also resets the prescaler, if
the prescaler is assigned to the
WDT and not Timer0. Status bits
TO and PD are set.
COMF Complement f
Syntax: [ label ] COMF f,d
Operands: 0 f 31
d [0,1]
Operation: (f) (dest)
Status Affected: Z
Description: The contents of register ‘f’ are
complemented. If ‘d’ is ‘0’, the
result is stored in the W register. If
‘d’ is ‘1’, the result is stored back in
register ‘f’.
2005-2013 Microchip Technology Inc. DS40001270F-page 47
PIC10F220/222
DECF Decrement f
Syntax: [ label ] DECF f,d
Operands: 0 f 31
d [0,1]
Operation: (f) – 1 (dest)
Status Affected: Z
Description: Decrement register ‘f’. If ‘d’ is ‘0’,
the result is stored in the W
register. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
DECFSZ Decrement f, Skip if 0
Syntax: [ label ] DECFSZ f,d
Operands: 0 f 31
d [0,1]
Operation: (f) – 1 d; skip if result = 0
Status Affected: None
Description: The contents of register ‘f’ are dec-
remented. If ‘d’ is ‘0’, the result is
placed in the W register. If ‘d’ is ‘1’,
the result is placed back in register
‘f’.
If the result is ‘0’, the next instruc-
tion, which is already fetched, is
discarded and a NOP is executed
instead making it a two-cycle
instruction.
GOTO Unconditional Branch
Syntax: [ label ] GOTO k
Operands: 0 k 511
Operation: k PC<8:0>;
STATUS<6:5> PC<10:9>
Status Affected: None
Description: GOTO is an unconditional branch.
The 9-bit immediate value is
loaded into PC bits <8:0>. The
upper bits of PC are loaded from
STATUS<6:5>. GOTO is a two-
cycle instruction.
INCF Increment f
Syntax: [ label ] INCF f,d
Operands: 0 f 31
d [0,1]
Operation: (f) + 1 (dest)
Status Affected: Z
Description: The contents of register ‘f’ are
incremented. If ‘d’ is ‘0’, the result
is placed in the W register. If ‘d’ is
‘1’, the result is placed back in
register ‘f’.
INCFSZ Increment f, Skip if 0
Syntax: [ label ] INCFSZ f,d
Operands: 0 f 31
d [0,1]
Operation: (f) + 1 (dest), skip if result = 0
Status Affected: None
Description: The contents of register ‘f’ are
incremented. If ‘d’ is ‘0’, the result
is placed in the W register. If ‘d’ is
‘1’, the result is placed back in
register ‘f’.
If the result is ‘0’, then the next
instruction, which is already
fetched, is discarded and a NOP is
executed instead making it a two-
cycle instruction.
IORLW Inclusive OR literal with W
Syntax: [ label ] IORLW k
Operands: 0 k 255
Operation: (W) .OR. (k) (W)
Status Affected: Z
Description: The contents of the W register are
OR’ed with the eight-bit literal ‘k’.
The result is placed in the W
register.
PIC10F220/222
DS40001270F-page 48 2005-2013 Microchip Technology Inc.
IORWF Inclusive OR W with f
Syntax: [ label ] IORWF f,d
Operands: 0 f 31
d [0,1]
Operation: (W).OR. (f) (dest)
Status Affected: Z
Description: Inclusive OR the W register with
register ‘f’. If ‘d’ is ‘0’, the result is
placed in the W register. If ‘d’ is ‘1’,
the result is placed back in register
‘f’.
MOVF Move f
Syntax: [ label ] MOVF f,d
Operands: 0 f 31
d [0,1]
Operation: (f) (dest)
Status Affected: Z
Description: The contents of register ‘f’ are
moved to destination ‘d’. If ‘d’ is ‘0’,
destination is the W register. If ‘d’
is ‘1’, the destination is file register
‘f’. ‘d’ = 1 is useful as a test of a file
register, since status flag Z is
affected.
MOVLW Move Literal to W
Syntax: [ label ] MOVLW k
Operands: 0 k 255
Operation: k (W)
Status Affected: None
Description: The eight-bit literal ‘k’ is loaded
into the W register. The “don’t
cares” will assembled as ‘0’s.
MOVWF Move W to f
Syntax: [ label ] MOVWF f
Operands: 0 f 31
Operation: (W) (f)
Status Affected: None
Description: Move data from the W register to
register ‘f’.
NOP No Operation
Syntax: [ label ] NOP
Operands: None
Operation: No operation
Status Affected: None
Description: No operation.
OPTION Load OPTION Register
Syntax: [ label ] OPTION
Operands: None
Operation: (W) OPTION
Status Affected: None
Description: The content of the W register is
loaded into the OPTION register.
2005-2013 Microchip Technology Inc. DS40001270F-page 49
PIC10F220/222
RETLW Return with Literal in W
Syntax: [ label ] RETLW k
Operands: 0 k 255
Operation: k (W);
TOS PC
Status Affected: None
Description: The W register is loaded with the
eight-bit literal ‘k’. The program
counter is loaded from the top of
the stack (the return address). This
is a two-cycle instruction.
RLF Rotate Left f through Carry
Syntax: [ label ] RLF f,d
Operands: 0 f 31
d [0,1]
Operation: See description below
Status Affected: C
Description: The contents of register ‘f’ are
rotated one bit to the left through
the Carry Flag. If ‘d’ is ‘0’, the
result is placed in the W register. If
‘d’ is ‘1’, the result is stored back in
register ‘f’.
RRF Rotate Right f through Carry
Syntax: [ label ] RRF f,d
Operands: 0 f 31
d [0,1]
Operation: See description below
Status Affected: C
Description: The contents of register ‘f’ are
rotated one bit to the right through
the Carry Flag. If ‘d’ is ‘0’, the
result is placed in the W register. If
‘d’ is ‘1’, the result is placed back
in register ‘f’.
Cregister ‘f’
Cregister ‘f’
SLEEP Enter SLEEP Mode
Syntax: [label]SLEEP
Operands: None
Operation: 00h WDT;
0 WDT prescaler;
1 TO;
0 PD
Status Affected: TO, PD, RBWUF
Description: Time-out Status bit (TO) is set. The
Power-down Status bit (PD) is
cleared.
RBWUF is unaffected.
The WDT and its prescaler are
cleared.
The processor is put into Sleep
mode with the oscillator stopped.
See section on Sleep for more
details.
SUBWF Subtract W from f
Syntax: [label] SUBWF f,d
Operands: 0 f 31
d [0,1]
Operation: (f) – (W) dest)
Status Affected: C, DC, Z
Description: Subtract (2’s complement method)
the W register from register ‘f’. If ‘d’
is ‘0’, the result is stored in the W
register. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
SWAPF Swap Nibbles in f
Syntax: [label] SWAPF f,d
Operands: 0 f 31
d [0,1]
Operation: (f<3:0>) (dest<7:4>);
(f<7:4>) (dest<3:0>)
Status Affected: None
Description: The upper and lower nibbles of
register ‘f’ are exchanged. If ‘d’ is
‘0’, the result is placed in W
register. If ‘d’ is ‘1’, the result is
placed in register ‘f’.
PIC10F220/222
DS40001270F-page 50 2005-2013 Microchip Technology Inc.
TRIS Load TRIS Register
Syntax: [ label ] TRIS f
Operands: f = 6
Operation: (W) TRIS register f
Status Affected: None
Description: TRIS register ‘f’ (f = 6 or 7) is
loaded with the contents of the W
register
XORLW Exclusive OR literal with W
Syntax: [label]XORLW k
Operands: 0 k 255
Operation: (W) .XOR. k W)
Status Affected: Z
Description: The contents of the W register are
XOR’ed with the eight-bit literal ‘k’.
The result is placed in the W
register.
XORWF Exclusive OR W with f
Syntax: [ label ] XORWF f,d
Operands: 0 f 31
d [0,1]
Operation: (W) .XOR. (f) dest)
Status Affected: Z
Description: Exclusive OR the contents of the
W register with register ‘f’. If ‘d’ is
‘0’, the result is stored in the W
register. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
2005-2013 Microchip Technology Inc. DS40001270F-page 51
PIC10F220/222
10.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings(†)
Ambient temperature under bias.............................................................................................................-40°C to +125°C
Storage temperature ...............................................................................................................................-65°C to +150°C
Voltage on VDD with respect to VSS ..................................................................................................................0 to +6.5V
Voltage on MCLR with respect to VSS.............................................................................................................0 to +13.5V
Voltage on all other pins with respect to VSS .................................................................................. -0.3V to (VDD + 0.3V)
Total power dissipation(1) .....................................................................................................................................800 mW
Max. current out of VSS pin .....................................................................................................................................80 mA
Max. current into VDD pin ........................................................................................................................................80 mA
Input clamp current, IIK (VI < 0 or VI > VDD)20 mA
Output clamp current, IOK (VO < 0 or VO > VDD)20 mA
Max. output current sunk by any I/O pin .................................................................................................................25 mA
Max. output current sourced by any I/O pin ............................................................................................................25 mA
Max. output current sourced by I/O port .................................................................................................................75 mA
Max. output current sunk by I/O port ......................................................................................................................75 mA
Note 1: Power dissipation is calculated as follows: PDIS = VDD x {IDD – IOH} + {(VDD – VOH) x IOH} .. + (VOL x
IOL)
†NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above
those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
PIC10F220/222
DS40001270F-page 52 2005-2013 Microchip Technology Inc.
FIGURE 10-1: VOLTAGE-FREQUENCY GRAPH, -40C TA +125C
6.0
2.5
4.0
3.0
0
3.5
4.5
5.0
5.5
410
Frequency (MHz)
VDD
20
(Volts)
25
2.0
8
2005-2013 Microchip Technology Inc. DS40001270F-page 53
PIC10F220/222
10.1 DC Characteristics: PIC10F220/222 (Industrial)
DC CHARACTERISTICS Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40×C TA +85C (industrial)
Param
No. Sym Characteristic Min Typ(1) Max Units Conditions
D001 VDD Supply Voltage 2.0 5.5 V See Figure 10-1
D002 VDR RAM Data Retention Voltage(2) 1.5* — — V Device in Sleep mode
D003 VPOR VDD Start Voltage
to ensure Power-on Reset
— Vss— V
D004 SVDD VDD Rise Rate
to ensure Power-on Reset
0.05* — — V/ms
IDD Supply Current(3)
D010 —
—
—
—
175
0.625
250
0.800
275
1.1
400
1.5
A
mA
A
mA
VDD = 2.0V, Fosc = 4 MHz
VDD = 5.0V, Fosc = 4 MHz
VDD = 2.0V, Fosc = 8 MHz
VDD = 5.0V, Fosc = 8 MHz
IPD Power-down Current(4)
D020 —
—
0.1
1
1.2
2.4
A
A
VDD = 2.0V
VDD = 5.0V
IWDT WDT Current(4)
D022 —
—
1.0
7
3
16
A
A
VDD = 2.0V
VDD = 5.0V
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is based on characterization results at 25C. This data is for design guidance only
and is not tested.
2: This is the limit to which VDD can be lowered in Sleep mode without losing RAM data.
3: The supply current is mainly a function of the operating voltage and frequency. Other factors such as bus loading, bus
rate, internal code execution pattern and temperature also have an impact on the current consumption.
a) The test conditions for all IDD measurements in active operation mode are:
All I/O pins tri-stated, pulled to VSS, T0CKI = VDD, MCLR = VDD; WDT enabled/disabled as specified.
b) For standby current measurements, the conditions are the same, except that the device is in Sleep mode.
4: Power-down current is measured with the part in Sleep mode, with all I/O pins in high-impedance state and tied to VDD
or VSS. The peripheral current is the sum of the base IPD and the additional current consumed when the peripheral is
enabled.
PIC10F220/222
DS40001270F-page 54 2005-2013 Microchip Technology Inc.
10.2 DC Characteristics: PIC10F220/222 (Extended)
DC CHARACTERISTICS Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40×C £ TA £ +125×C (extended)
Param
No. Sym Characteristic Min Typ(1) Max Units Conditions
D001 VDD Supply Voltage 2.0 5.5 V See Figure 10-1
D002 VDR RAM Data Retention Voltage(2) 1.5* — V Device in Sleep mode
D003 VPOR VDD Start Voltage
to ensure Power-on Reset
—Vss— V
IDD Supply Current(3)
D010 —
—
—
—
175
0.625
250
0.800
275
1.1
400
1.5
A
mA
A
mA
VDD = 2.0V, Fosc = 4 MHz
VDD = 5.0V, Fosc = 4 MHz
VDD = 2.0V, Fosc = 8 MHz
VDD = 5.0V, Fosc = 8 MHz
IPD Power-down Current(4)
D020 —
—
0.1
1
9
15
A
A
VDD = 2.0V
VDD = 5.0V
IWDT WDT Current(4)
D022 —
—
1.0
7
18
22
A
A
VDD = 2.0V
VDD = 5.0V
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is based on characterization results at 25C. This data is for design guidance only
and is not tested.
2: This is the limit to which VDD can be lowered in Sleep mode without losing RAM data.
3: The supply current is mainly a function of the operating voltage and frequency. Other factors such as bus loading, bus
rate, internal code execution pattern and temperature also have an impact on the current consumption.
a) The test conditions for all IDD measurements in active operation mode are:
All I/O pins tri-stated, pulled to VSS, T0CKI = VDD, MCLR = VDD; WDT enabled/disabled as specified.
b) For standby current measurements, the conditions are the same, except that the device is in Sleep mode.
4: Power-down current is measured with the part in Sleep mode, with all I/O pins in high-impedance state and tied to VDD
or VSS. The peripheral current is the sum of the base IPD and the additional current consumed when the peripheral is
enabled.
2005-2013 Microchip Technology Inc. DS40001270F-page 55
PIC10F220/222
10.3 DC Characteristics: PIC10F220/222 (Industrial, Extended)
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating temperature -40°C T
A +85°C (industrial)
-40°C T
A +125°C (extended)
Operating voltage VDD range as described in DC specification
Param
No. Sym Characteristic Min Typ† Max Units Conditions
VIL Input Low Voltage
I/O ports:
D030 with TTL buffer Vss — 0.8 V For all 4.5 VDD 5.5V
D030A Vss — 0.15 VDD V Otherwise
D031 with Schmitt Trigger
buffer
Vss — 0.2 VDD V
D032 MCLR, T0CKI Vss — 0.2 VDD V
VIH Input High Voltage
I/O ports: —
D040 with TTL buffer 2.0 — VDD V4.5 VDD 5.5V
D040A 0.25 VDD + 0.8 — VDD V Otherwise
D041 with Schmitt Trigger
buffer
0.8VDD —VDD V For entire VDD range
D042 MCLR, T0CKI 0.8VDD —VDD V
D070 IPUR GPIO weak pull-up current 50 250 400 AVDD = 5V, VPIN = VSS
IIL Input Leakage Current(1)
D060 I/O ports — ±0.1 ± 1 AVss VPIN VDD, Pin at high-imped-
ance
D061 GP3/MCLR(2) —±0.7± 5AVss VPIN VDD
Output Low Voltage
D080 I/O ports — — 0.6 V IOL = 8.5 mA, VDD = 4.5V, -40C to
+85C
D080A — — 0.6 V IOL = 7.0 mA, VDD = 4.5V, -40C to
+125C
Output High Voltage
D090 I/O ports(2) VDD – 0.7 — — V IOH = -3.0 mA, VDD = 4.5V, -40C to
+85C
D090A VDD – 0.7 — — V IOH = -2.5 mA, VDD = 4.5V, -40C to
+125C
Capacitive Loading Specs on Output Pins
D101 All I/O pins — — 50* pF
† Data in “Typ” column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not
tested.
* These parameters are for design guidance only and are not tested.
Note 1: Negative current is defined as coming out of the pin.
2: This specification applies when GP3/MCLR is configured as an input with pull-up disabled. The leakage current of the
MCLR circuit is higher than the standard I/O logic.
PIC10F220/222
DS40001270F-page 56 2005-2013 Microchip Technology Inc.
TABLE 10-1: PULL-UP RESISTOR RANGES
VDD (Volts) Temperature (C) Min Typ Max Units
GP0/GP1
2.0 -40 73K 105K 186K
25 73K 113K 187K
85 82K 123K 190K
125 86K 132k 190K
5.5 -40 15K 21K 33K
25 15K 22K 34K
85 19K 26k 35K
125 23K 29K 35K
GP3
2.0 -40 63K 81K 96K
25 77K 93K 116K
85 82K 96k 116K
125 86K 100K 119K
5.5 -40 16K 20k 22K
25 16K 21K 23K
85 24K 25k 28K
125 26K 27K 29K
2005-2013 Microchip Technology Inc. DS40001270F-page 57
PIC10F220/222
10.4 Timing Parameter Symbology and Load Conditions
The timing parameter symbols have been created following one of the following formats:
FIGURE 10-2: LOAD CONDITIONS
TABLE 10-2: CALIBRATED INTERNAL RC FREQUENCIES – PIC10F220/222
1. TppS2ppS
2. TppS
T
F Frequency T Time
Lowercase subscripts (pp) and their meanings:
pp
2to mcMCLR
ck CLKOUT osc Oscillator
cy Cycle time os OSC1
drt Device Reset Timer t0 T0CKI
io I/O port wdt Watchdog Timer
Uppercase letters and their meanings:
S
FFall PPeriod
HHigh RRise
I Invalid (high-impedance) V Valid
L Low Z High-impedance
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40C TA +85C (industrial),
-40C TA +125C (extended)
Operating Voltage VDD range is described in
Section 10.1 “DC Characteristics: PIC10F220/222 (Industrial)”.
Param
No. Sym Characteristic Freq.
Tolerance Min Typ† Max Units Conditions
F10 FOSC Internal Calibrated
INTOSC
Frequency(1, 2, 3)
1% 3.96 4.00 4.04 MHz VDD=3.5V @ 25C
2% 3.92 4.00 4.08 MHz 2.5V VDD 5.5V
0C TA +85C (industrial)
5% 3.80 4.00 4.20 MHz 2.0V VDD 5.5V
-40C T
A +85C (industrial)
-40C TA +125C (extended)
† Data in the Typical (“Typ”) column is at 5V, 25C unless otherwise stated. These parameters are for design
guidance only and are not tested.
Note 1: To ensure these oscillator frequency tolerances, VDD and VSS must be capacitively decoupled as close to
the device as possible. 0.1 F and 0.01 F values in parallel are recommended.
2: Under stable VDD conditions.
3: Frequency values in this table are doubled when the 8 MHz INTOSC option is selected.
CL
VSS
pin
Legend:
CL = 50 pF for all pins
PIC10F220/222
DS40001270F-page 58 2005-2013 Microchip Technology Inc.
FIGURE 10-3: RESET, WATCHDOG TIMER AND DEVICE RESET TIMER TIMING
TABLE 10-3: RESET, WATCHDOG TIMER AND DEVICE RESET TIMER – PIC10F220/222
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40C T
A +85C (industrial)
-40C T
A +125C (extended)
Operating Voltage VDD range is described in Section 10.1 “DC
Characteristics: PIC10F220/222 (Industrial)”
Param
No. Sym Characteristic Min Typ(1) Max Units Conditions
30 TMCLMCLR Pulse Width (low) 2*
5*
—
—
—
—
s
s
VDD = 5V, -40°C to +85°C
VDD = 5.0V
31 TWDT Watchdog Timer Time-out Period
(no prescaler)
10
10
18
18
29
31
ms
ms
VDD = 5.0V (Industrial)
VDD = 5.0V (Extended)
32 TDRT* Device Reset Timer Period
(standard)
0.600
0.600
1.125
1.125
1.85
1.95
ms
ms
VDD = 5.0V (Industrial)
VDD = 5.0V (Extended)
34 TIOZ I/O High-impedance from MCLR
low
——2*s
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is at 5V, 25C unless otherwise stated. These parameters are for design
guidance only and are not tested.
VDD
MCLR
Internal
POR
DRT
Timeout(2)
Internal
Reset
Watchdog
Timer
Reset
32
31
34
I/O pin(1)
32 32
34
30
Note 1: I/O pins must be taken out of High-impedance mode by enabling the output drivers in software.
2: Runs on POR Reset only.
2005-2013 Microchip Technology Inc. DS40001270F-page 59
PIC10F220/222
FIGURE 10-4: TIMER0 CLOCK TIMINGS
TABLE 10-4: TIMER0 CLOCK REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40C TA +85C (industrial)
-40C TA +125C (extended)
Param
No. Sym Characteristic Min Typ(1) Max Units Conditions
40 Tt0H T0CKI High Pulse
Width
No Prescaler 0.5 TCY + 20* — — ns
With Prescaler 10* — — ns
41 Tt0L T0CKI Low Pulse
Width
No Prescaler 0.5 TCY + 20* — — ns
With Prescaler 10* — — ns
42 Tt0P T0CKI Period 20 or T
CY + 40* N — — ns Whichever is greater.
N = Prescale Value
(1, 2, 4,..., 256)
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is at 5V, 25°C unless otherwise stated. These parameters are for design
guidance only and are not tested.
T0CKI
40 41
42
PIC10F220/222
DS40001270F-page 60 2005-2013 Microchip Technology Inc.
TABLE 10-5: A/D CONVERTER CHARACTERISTICS
TABLE 10-6: A/D CONVERSION REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C TA +125°C
Param
No. Sym Characteristic Min Typ† Max Units Conditions
A01 NRResolution — — 8 bits bit
A03 EIL Integral Error — — ±1.5 LSb
A04 EDL Differential Error — — -1 < EDL + 1.5 LSb
A05 EFS Full-scale Range 2.0* — 5.5* V
A06 EOFF Offset Error — — ±1.5 LSb
A07 EGN Gain Error — — ±1.5 LSb
A10 — Monotonicity — guaranteed(1) ——VSS VAIN VDD
A25 VAIN Analog Input Voltage VSS —VDD V
A30 ZAIN Recommended
Impedence of Analog
Voltage Source
—— 10 k
A31* IAD A/D Conversion Current(2) — 120 150 A2.0V
— 200 250 A5.0V
* These parameters are characterized but not tested.
† Data in the “Typ” column is at 5.0V, 25°C unless otherwise stated. These parameters are for design
guidance only are not tested.
Note 1: The A/D conversion result never decreases with an increase in the input voltage and has no missing
codes.
2: This is the additional current consumed by the A/D module when it is enabled; this current adds to base
IDD.
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C T
A +125°C
Param
No. Sym Characteristic Min Typ† Max Units Conditions
AD131 T
CNV Conversion Time
(not including
Acquisition Time)
—13—T
CY Set GO/DONE bit to new data in A/D
Result register
AD132* TACQ Acquisition Time(1) —3.5
5
—s
s
VDD = 5V
VDD = 2.5V
* These parameters are characterized but not tested.
† Data in ‘Typ’ column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
Note 1: The Section 7.9 “A/D Acquisition Requirements” for information on how to compute minimum
acquisition times based on operating conditions.
2005-2013 Microchip Technology Inc. DS40001270F-page 61
PIC10F220/222
11.0 DC AND AC CHARACTERISTICS GRAPHS AND TABLES.
“Typical” represents the mean of the distribution at 25C. “Maximum” or “minimum” represents (mean + 3) or (mean -
3) respectively, where s is a standard deviation, over each temperature range.
FIGURE 11-1: IDD vs. VDD OVER FOSC (4 MHZ)
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein are
not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore, outside the warranted range.
XT Mode
0
200
400
600
800
1,000
1,200
1,400
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
IDD (A)
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
4 MHz
4 MHz
Maximum
Typical
PIC10F220/222
DS40001270F-page 62 2005-2013 Microchip Technology Inc.
FIGURE 11-2: IDD vs. VDD OVER FOSC (8 MHZ)
FIGURE 11-3: TYPICAL IPD vs. VDD (SLEEP MODE, ALL PERIPHERALS DISABLED)
Typical
(Sleep Mode all Peripherals Disabled)
0.0
200
400
600
800
1,000
1,200
1,400
1,600
1,800
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
IDD (A)
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
Maximum
Typical
8 MHz
8 MHz
Typical
(Sleep Mode all Peripherals Disabled)
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
IPD (A)
Typical: Statistical Mean @25
°C
0.10
0.0
2005-2013 Microchip Technology Inc. DS40001270F-page 63
PIC10F220/222
FIGURE 11-4: MAXIMUM IPD vs. VDD (SLEEP MODE, ALL PERIPHERALS DISABLED)
FIGURE 11-5: TYPICAL WDT IPD vs. VDD
Maximum
(Sleep Mode all Peripherals Disabled)
Max. 125°C
Max. 85°C
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
2.02.5 3.03.5 4.04.5 5.05.5
VDD (V)
IPD (A)
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
0
1
2
3
4
5
6
7
8
9
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
IPD (A)
Typical: Statistical Mean @25°C
PIC10F220/222
DS40001270F-page 64 2005-2013 Microchip Technology Inc.
FIGURE 11-6: MAXIMUM WDT IPD vs. VDD OVER TEMPERATURE
FIGURE 11-7: WDT TIME-OUT vs. VDD OVER TEMPERATURE (NO PRESCALER)
Maximum
Max. 125°C
Max. 85°C
0.0
5.0
10.0
15.0
20.0
25.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
IPD (A)
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
0
5
10
15
20
25
30
35
40
45
50
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
Time (ms)
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
Max. 125°C
Max. 85°C
Typical. 25°C
Min. -40°C
2005-2013 Microchip Technology Inc. DS40001270F-page 65
PIC10F220/222
FIGURE 11-8: VOL vs. IOL OVER TEMPERATURE (VDD = 3.0V)
FIGURE 11-9: VOL vs. IOL OVER TEMPERATURE (VDD = 5.0V)
(VDD = 3V, -40×C TO 125×C)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
IOL (mA)
VOL (V)
Max. 85°C
Max. 125°C
Typical 25°C
Min. -40°C
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
IOL (mA)
VOL (V)
Typical: Statistical Mean @25×C
Maximum: Meas + 3 (-40×C to 125×C)
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
Max. 85°C
Typ. 25°C
Min. -40°C
Max. 125°C
PIC10F220/222
DS40001270F-page 66 2005-2013 Microchip Technology Inc.
FIGURE 11-10: VOH vs. IOH OVER TEMPERATURE (VDD = 3.0V)
FIGURE 11-11: VOH vs. IOH OVER TEMPERATURE (VDD = 5.0V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-4.0-3.5-3.0-2.5-2.0-1.5-1.0-0.50.0
IOH (mA)
VOH (V)
Typ. 25°C
Max. -40°C
Min. 125°C
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
(, )
3.0
3.5
4.0
4.5
5.0
5.5
-5.0-4.5-4.0-3.5-3.0-2.5-2.0-1.5-1.0-0.50.0
IOH (mA)
VOH (V)
Max. -40°C
Typ. 25°C
Min. 125°C
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
2005-2013 Microchip Technology Inc. DS40001270F-page 67
PIC10F220/222
FIGURE 11-12: TTL INPUT THRESHOLD VIN vs. VDD
FIGURE 11-13: SCHMITT TRIGGER INPUT THRESHOLD VIN vs. VDD
(TTL Input, -40×C TO 125×C)
0.5
0.7
0.9
1.1
1.3
1.5
1.7
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
VIN (V)
Typ. 25°C
Max. -40°C
Min. 125°C
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
(ST Input, -40×C TO 125×C)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
VIN (V)
VIH Max. 125°C
VIH Min. -40°C
VIL Min. 125°C
VIL Max. -40°C
Typical: Statistical Mean @25°C
Maximum: Mean (Worst Case Temp) + 3
(-40°C to 125°C)
PIC10F220/222
DS40001270F-page 68 2005-2013 Microchip Technology Inc.
NOTES:
2005-2013 Microchip Technology Inc. DS40001270F-page 69
PIC10F220/222
12.0 DEVELOPMENT SUPPORT
The PIC® microcontrollers (MCU) and dsPIC® digital
signal controllers (DSC) are supported with a full range
of software and hardware development tools:
• Integrated Development Environment
- MPLAB® X IDE Software
• Compilers/Assemblers/Linkers
- MPLAB XC Compiler
- MPASMTM Assembler
-MPLINK
TM Object Linker/
MPLIBTM Object Librarian
- MPLAB Assembler/Linker/Librarian for
Various Device Families
• Simulators
- MPLAB X SIM Software Simulator
•Emulators
- MPLAB REAL ICE™ In-Circuit Emulator
• In-Circuit Debuggers/Programmers
- MPLAB ICD 3
- PICkit™ 3
• Device Programmers
- MPLAB PM3 Device Programmer
• Low-Cost Demonstration/Development Boards,
Evaluation Kits and Starter Kits
• Third-party development tools
12.1 MPLAB X Integrated Development
Environment Software
The MPLAB X IDE is a single, unified graphical user
interface for Microchip and third-party software, and
hardware development tool that runs on Windows®,
Linux and Mac OS® X. Based on the NetBeans IDE,
MPLAB X IDE is an entirely new IDE with a host of free
software components and plug-ins for high-
performance application development and debugging.
Moving between tools and upgrading from software
simulators to hardware debugging and programming
tools is simple with the seamless user interface.
With complete project management, visual call graphs,
a configurable watch window and a feature-rich editor
that includes code completion and context menus,
MPLAB X IDE is flexible and friendly enough for new
users. With the ability to support multiple tools on
multiple projects with simultaneous debugging, MPLAB
X IDE is also suitable for the needs of experienced
users.
Feature-Rich Editor:
• Color syntax highlighting
• Smart code completion makes suggestions and
provides hints as you type
• Automatic code formatting based on user-defined
rules
• Live parsing
User-Friendly, Customizable Interface:
• Fully customizable interface: toolbars, toolbar
buttons, windows, window placement, etc.
• Call graph window
Project-Based Workspaces:
• Multiple projects
• Multiple tools
• Multiple configurations
• Simultaneous debugging sessions
File History and Bug Tracking:
• Local file history feature
• Built-in support for Bugzilla issue tracker
PIC10F220/222
DS40001270F-page 70 2005-2013 Microchip Technology Inc.
12.2 MPLAB XC Compilers
The MPLAB XC Compilers are complete ANSI C
compilers for all of Microchip’s 8, 16, and 32-bit MCU
and DSC devices. These compilers provide powerful
integration capabilities, superior code optimization and
ease of use. MPLAB XC Compilers run on Windows,
Linux or MAC OS X.
For easy source level debugging, the compilers provide
debug information that is optimized to the MPLAB X
IDE.
The free MPLAB XC Compiler editions support all
devices and commands, with no time or memory
restrictions, and offer sufficient code optimization for
most applications.
MPLAB XC Compilers include an assembler, linker and
utilities. The assembler generates relocatable object
files that can then be archived or linked with other relo-
catable object files and archives to create an execut-
able file. MPLAB XC Compiler uses the assembler to
produce its object file. Notable features of the assem-
bler include:
• Support for the entire device instruction set
• Support for fixed-point and floating-point data
• Command-line interface
• Rich directive set
• Flexible macro language
• MPLAB X IDE compatibility
12.3 MPASM Assembler
The MPASM Assembler is a full-featured, universal
macro assembler for PIC10/12/16/18 MCUs.
The MPASM Assembler generates relocatable object
files for the MPLINK Object Linker, Intel® standard HEX
files, MAP files to detail memory usage and symbol
reference, absolute LST files that contain source lines
and generated machine code, and COFF files for
debugging.
The MPASM Assembler features include:
• Integration into MPLAB X IDE projects
• User-defined macros to streamline
assembly code
• Conditional assembly for multipurpose
source files
• Directives that allow complete control over the
assembly process
12.4 MPLINK Object Linker/
MPLIB Object Librarian
The MPLINK Object Linker combines relocatable
objects created by the MPASM Assembler. It can link
relocatable objects from precompiled libraries, using
directives from a linker script.
The MPLIB Object Librarian manages the creation and
modification of library files of precompiled code. When
a routine from a library is called from a source file, only
the modules that contain that routine will be linked in
with the application. This allows large libraries to be
used efficiently in many different applications.
The object linker/library features include:
• Efficient linking of single libraries instead of many
smaller files
• Enhanced code maintainability by grouping
related modules together
• Flexible creation of libraries with easy module
listing, replacement, deletion and extraction
12.5 MPLAB Assembler, Linker and
Librarian for Various Device
Families
MPLAB Assembler produces relocatable machine
code from symbolic assembly language for PIC24,
PIC32 and dsPIC DSC devices. MPLAB XC Compiler
uses the assembler to produce its object file. The
assembler generates relocatable object files that can
then be archived or linked with other relocatable object
files and archives to create an executable file. Notable
features of the assembler include:
• Support for the entire device instruction set
• Support for fixed-point and floating-point data
• Command-line interface
• Rich directive set
• Flexible macro language
• MPLAB X IDE compatibility
2005-2013 Microchip Technology Inc. DS40001270F-page 71
PIC10F220/222
12.6 MPLAB X SIM Software Simulator
The MPLAB X SIM Software Simulator allows code
development in a PC-hosted environment by simulat-
ing the PIC MCUs and dsPIC DSCs on an instruction
level. On any given instruction, the data areas can be
examined or modified and stimuli can be applied from
a comprehensive stimulus controller. Registers can be
logged to files for further run-time analysis. The trace
buffer and logic analyzer display extend the power of
the simulator to record and track program execution,
actions on I/O, most peripherals and internal registers.
The MPLAB X SIM Software Simulator fully supports
symbolic debugging using the MPLAB XC Compilers,
and the MPASM and MPLAB Assemblers. The soft-
ware simulator offers the flexibility to develop and
debug code outside of the hardware laboratory envi-
ronment, making it an excellent, economical software
development tool.
12.7 MPLAB REAL ICE In-Circuit
Emulator System
The MPLAB REAL ICE In-Circuit Emulator System is
Microchip’s next generation high-speed emulator for
Microchip Flash DSC and MCU devices. It debugs and
programs all 8, 16 and 32-bit MCU, and DSC devices
with the easy-to-use, powerful graphical user interface of
the MPLAB X IDE.
The emulator is connected to the design engineer’s
PC using a high-speed USB 2.0 interface and is
connected to the target with either a connector
compatible with in-circuit debugger systems (RJ-11)
or with the new high-speed, noise tolerant, Low-
Voltage Differential Signal (LVDS) interconnection
(CAT5).
The emulator is field upgradable through future firmware
downloads in MPLAB X IDE. MPLAB REAL ICE offers
significant advantages over competitive emulators
including full-speed emulation, run-time variable
watches, trace analysis, complex breakpoints, logic
probes, a ruggedized probe interface and long (up to
three meters) interconnection cables.
12.8 MPLAB ICD 3 In-Circuit Debugger
System
The MPLAB ICD 3 In-Circuit Debugger System is
Microchip’s most cost-effective, high-speed hardware
debugger/programmer for Microchip Flash DSC and
MCU devices. It debugs and programs PIC Flash
microcontrollers and dsPIC DSCs with the powerful,
yet easy-to-use graphical user interface of the MPLAB
IDE.
The MPLAB ICD 3 In-Circuit Debugger probe is
connected to the design engineer’s PC using a high-
speed USB 2.0 interface and is connected to the target
with a connector compatible with the MPLAB ICD 2 or
MPLAB REAL ICE systems (RJ-11). MPLAB ICD 3
supports all MPLAB ICD 2 headers.
12.9 PICkit 3 In-Circuit Debugger/
Programmer
The MPLAB PICkit 3 allows debugging and program-
ming of PIC and dsPIC Flash microcontrollers at a most
affordable price point using the powerful graphical user
interface of the MPLAB IDE. The MPLAB PICkit 3 is
connected to the design engineer’s PC using a full-
speed USB interface and can be connected to the tar-
get via a Microchip debug (RJ-11) connector (compati-
ble with MPLAB ICD 3 and MPLAB REAL ICE). The
connector uses two device I/O pins and the Reset line
to implement in-circuit debugging and In-Circuit Serial
Programming™ (ICSP™).
12.10 MPLAB PM3 Device Programmer
The MPLAB PM3 Device Programmer is a universal,
CE compliant device programmer with programmable
voltage verification at VDDMIN and VDDMAX for
maximum reliability. It features a large LCD display
(128 x 64) for menus and error messages, and a mod-
ular, detachable socket assembly to support various
package types. The ICSP cable assembly is included
as a standard item. In Stand-Alone mode, the MPLAB
PM3 Device Programmer can read, verify and program
PIC devices without a PC connection. It can also set
code protection in this mode. The MPLAB PM3
connects to the host PC via an RS-232 or USB cable.
The MPLAB PM3 has high-speed communications and
optimized algorithms for quick programming of large
memory devices, and incorporates an MMC card for file
storage and data applications.
PIC10F220/222
DS40001270F-page 72 2005-2013 Microchip Technology Inc.
12.11 Demonstration/Development
Boards, Evaluation Kits, and
Starter Kits
A wide variety of demonstration, development and
evaluation boards for various PIC MCUs and dsPIC
DSCs allows quick application development on fully
functional systems. Most boards include prototyping
areas for adding custom circuitry and provide applica-
tion firmware and source code for examination and
modification.
The boards support a variety of features, including LEDs,
temperature sensors, switches, speakers, RS-232
interfaces, LCD displays, potentiometers and additional
EEPROM memory.
The demonstration and development boards can be
used in teaching environments, for prototyping custom
circuits and for learning about various microcontroller
applications.
In addition to the PICDEM™ and dsPICDEM™
demonstration/development board series of circuits,
Microchip has a line of evaluation kits and demonstra-
tion software for analog filter design, KEELOQ® security
ICs, CAN, IrDA®, PowerSmart battery management,
SEEVAL® evaluation system, Sigma-Delta ADC, flow
rate sensing, plus many more.
Also available are starter kits that contain everything
needed to experience the specified device. This usually
includes a single application and debug capability, all
on one board.
Check the Microchip web page (www.microchip.com)
for the complete list of demonstration, development
and evaluation kits.
12.12 Third-Party Development Tools
Microchip also offers a great collection of tools from
third-party vendors. These tools are carefully selected
to offer good value and unique functionality.
• Device Programmers and Gang Programmers
from companies, such as SoftLog and CCS
• Software Tools from companies, such as Gimpel
and Trace Systems
• Protocol Analyzers from companies, such as
Saleae and Total Phase
• Demonstration Boards from companies, such as
MikroElektronika, Digilent® and Olimex
• Embedded Ethernet Solutions from companies,
such as EZ Web Lynx, WIZnet and IPLogika®
2005-2013 Microchip Technology Inc. DS40001270F-page 73
PIC10F220/222
13.0 PACKAGING INFORMATION
13.1 Package Marking Information
XXX
8-Lead DFN*
YWW
NN
Example
XXXXXNNN
8-Lead PDIP
XXXXXXXX
YYWW
Example
PIC10F220
0520
6-Lead SOT-23*
XXNN
Example
20JR
3
e
I/P 07Q
BJ0
625
3Q
Legend: XX...X Product-specific information
Y Year code (last digit of calendar year)
YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code
Pb-free JEDEC® designator for Matte Tin (Sn)
*This package is Pb-free. The Pb-free JEDEC designator ( )
can be found on the outer packaging for this package.
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
3
e
3
e
PIC10F220/222
DS40001270F-page 74 2005-2013 Microchip Technology Inc.
TABLE 13-1: 8-LEAD 2x3 DFN (MC) TOP
MARKING
TABLE 13-2: 6-LEAD SOT-23 (OT)
PACKAGE TOP MARKING
Part Number Marking
PIC10F220-I/MC BJ0
PIC10F220-E/MC BK0
PIC10F222-I/MC BL0
PIC10F222-E/MC BM0
Part Number Marking
PIC10F220-I/OT 20NN
PIC10F220-E/OT A0NN
PIC10F222-I/OT 22NN
PIC10F222-E/OT A2NN
Note: NN represents the alphanumeric
traceability code.
2005-2013 Microchip Technology Inc. DS40001270F-page 75
PIC10F220/222
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DS40001270F-page 76 2005-2013 Microchip Technology Inc.
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
2005-2013 Microchip Technology Inc. DS40001270F-page 77
PIC10F220/222
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2005-2013 Microchip Technology Inc. DS40001270F-page 79
PIC10F220/222
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
PIC10F220/222
DS40001270F-page 80 2005-2013 Microchip Technology Inc.
APPENDIX A: REVISION HISTORY
Revision A
Original release of document.
Revision B (03/2006)
Table 3-1, GP1; Section 4.7, Program Counter; Table 5-
2; Figure 8-5; Section 9.1, ANDWF, SLEEP, SUBWF,
SWAPF, XORLW.
Revision C (08/2006)
Added 8-Lead DFN pinout diagram, updated Table 1-1
with DFN package, updated Table 10-3 in Section 10.0,
added 8-Lead DFN package marking information to
section 13.0, updated the Product Identification
System section to include DFN package identification.
Added note to package drawings.
Revision D (02/2007)
Replaced Dev. Tool Section; Replaced Package
Drawings.
Revision E (06/2007)
Updated and added Characterization Data; Revised
Operating Current; Revised Section 8.4 and Note;
Revised Section 10.0, Total Power Dissipation, 10.1,
10.2, 10.3 DC Characteristics; Revised Tables 10-2,
10-3, 10-5, 10-6; Section 11.0; Revised Product ID
System.
Revision F (10/2013)
Revised Packaging Legend.
2005-2013 Microchip Technology Inc. DS40001270F-page 81
PIC10F220/222
INDEX
A
A/D
Specifications.............................................................. 60
ADC
Internal Sampling Switch (RSS) IMPEDANCE ................ 32
Source Impedance...................................................... 32
ALU ....................................................................................... 9
Assembler
MPASM Assembler..................................................... 62
B
Block Diagram
On-Chip Reset Circuit ................................................. 36
Timer0......................................................................... 25
TMR0/WDT Prescaler................................................. 28
Watchdog Timer.......................................................... 39
Block Diagrams
Analog Input Model ..................................................... 32
Brown-Out Protection Circuit .............................................. 40
C
C Compilers
MPLAB C18 ................................................................ 62
MPLAB C30 ................................................................ 62
Carry ..................................................................................... 9
Clocking Scheme ................................................................ 11
Code Protection ............................................................ 33, 41
Configuration Bits................................................................ 33
Customer Change Notification Service ............................... 75
Customer Notification Service............................................. 75
Customer Support ............................................................... 75
D
DC and AC Characteristics ................................................. 65
Development Support ......................................................... 61
Digit Carry ............................................................................. 9
E
Errata .................................................................................... 3
F
Family of Devices
PIC10F22X ................................................................... 5
FSR..................................................................................... 20
G
GPIO ................................................................................... 21
I
I/O Interfacing ..................................................................... 21
I/O Ports.............................................................................. 21
I/O Programming Considerations........................................ 23
ID Locations .................................................................. 33, 41
INDF.................................................................................... 20
Indirect Data Addressing..................................................... 20
Instruction Cycle ................................................................. 11
Instruction Flow/Pipelining .................................................. 11
Instruction Set Summary..................................................... 44
Internal Sampling Switch (RSS) IMPEDANCE ........................ 32
Internet Address.................................................................. 75
L
Loading of PC ..................................................................... 19
M
Memory Organization ......................................................... 13
Data Memory .............................................................. 14
Program Memory (PIC10F220) .................................. 13
Program Memory (PIC10F222) .................................. 13
Microchip Internet Web Site................................................ 75
MPLAB ASM30 Assembler, Linker, Librarian ..................... 62
MPLAB ICD 2 In-Circuit Debugger ..................................... 63
MPLAB ICE 2000 High-Performance Universal
In-Circuit Emulator...................................................... 63
MPLAB Integrated Development Environment Software.... 61
MPLAB PM3 Device Programmer ...................................... 63
MPLAB REAL ICE In-Circuit Emulator System .................. 63
MPLINK Object Linker/MPLIB Object Librarian .................. 62
O
OPTION Register................................................................ 17
OSCCAL Register............................................................... 18
Oscillator Configurations..................................................... 34
Oscillator Types
HS............................................................................... 34
LP ............................................................................... 34
P
PIC10F220/222 Device Varieties.......................................... 7
PICSTART Plus Development Programmer....................... 64
POR
Device Reset Timer (DRT) ................................... 33, 38
PD............................................................................... 39
Power-on Reset (POR)............................................... 33
TO............................................................................... 39
Power-down Mode.............................................................. 40
Prescaler ............................................................................ 27
Program Counter ................................................................ 19
Q
Q cycles.............................................................................. 11
R
Reader Response............................................................... 76
Read-Modify-Write.............................................................. 23
Register File Map
PIC10F220 ................................................................. 14
PIC10F222 ................................................................. 14
Registers
Special Function ......................................................... 14
Reset .................................................................................. 33
Reset on Brown-Out ........................................................... 40
S
Sleep ............................................................................ 33, 40
Software Simulator (MPLAB SIM) ...................................... 62
Special Features of the CPU .............................................. 33
Special Function Registers................................................. 14
Stack................................................................................... 19
STATUS Register ..................................................... 9, 15, 29
T
Timer0
Timer0 ........................................................................ 25
Timer0 (TMR0) Module .............................................. 25
TMR0 with External Clock .......................................... 26
Timing Parameter Symbology and Load Conditions .......... 57
TRIS Registers ................................................................... 21
PIC10F220/222
DS40001270F-page 82 2005-2013 Microchip Technology Inc.
W
Wake-up from Sleep ........................................................... 41
Watchdog Timer (WDT) ................................................ 33, 38
Period.......................................................................... 38
Programming Considerations ..................................... 38
WWW Address.................................................................... 75
WWW, On-Line Support........................................................ 3
Z
Zero bit.................................................................................. 9
2005-2013 Microchip Technology Inc. DS40001270F-page 83
PIC10F220/222
THE MICROCHIP WEB SITE
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
•Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
•General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
online discussion groups, Microchip consultant
program member listing
•Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com. Under “Support”, click on
“Customer Change Notification” and follow the
registration instructions.
CUSTOMER SUPPORT
Users of Microchip products can receive assistance
through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
Customers should contact their distributor,
representative or Field Application Engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technical support is available through the web site
at: http://microchip.com/support
PIC10F220/222
DS40001270F-page 84 2005-2013 Microchip Technology Inc.
NOTES:
2005-2013 Microchip Technology Inc. DS40001270F-page 85
PIC10F220/222
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO. X/XX XXX
PatternPackageTemperature
Range
Device
Device: PIC10F220
PIC10F222
PIC10F220T (Tape & Reel)
PIC10F222T (Tape & Reel)
Temperature
Range:
I= -40C to +85C (Industrial)
E= -40C to +125C (Extended)
Package: P = 300 mil PDIP (Pb-free)
OT = SOT-23, 6-LD (Pb-free)
MC = DFN, 8-LD 2x3 (Pb-free)
Pattern: Special Requirements
Examples:
a) PIC10F220-I/P = Industrial temp., PDIP
package (Pb-free)
b) PIC10F222T-E/OT = Extended temp., SOT-23
package (Pb-free), Tape and Reel
c) PIC10F222-E/MC = Extended temp., DFN
package (Pb-free)
DS40001270F-page 86 2005-2013 Microchip Technology Inc.
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08/20/13
