DS40044A - page ii
Preliminary
2002 Microchip Technology Inc.
Information contained in this publication regarding device
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and may be superseded by updates. It is your responsibility to
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The Microchip name and logo, the Microchip logo, K
EE
L
OQ
,
MPLAB, PIC, PICmicro, PICSTART and PRO MATE are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
FilterLab, micro
ID, MXDEV, MXLAB, PICMASTER, SEEVAL
and The Embedded Control Solutions Company are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
dsPIC, dsPICDEM.net, ECONOMONITOR, FanSense,
FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP,
ICEPIC, microPort, Migratable Memory, MPASM, MPLIB,
MPLINK, MPSIM, PICC, PICDEM, PICDEM.net, rfPIC, Select
Mode and Total Endurance are trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company's quality system processes and
procedures are QS-9000 compliant for its
PICmicro
8-bit MCUs, K
EE
L
OQ
code hopping
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip's quality system for the
design and manufacture of development
systems is ISO 9001 certified.
Note the following details of the code protection feature on Microchip devices:
Microchip products meet the specification contained in their particular Microchip Data Sheet.
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowl-
edge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as "unbreakable."
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products.
2002 Microchip Technology Inc.
Preliminary
DS40044A-page 1
PIC16F627A/628A/648A
High Performance RISC CPU:
Operating speeds from DC - 20 MHz
Interrupt capability
8-level deep hardware stack
Direct, Indirect and Relative Addressing modes
35 single word instructions
- All instructions single cycle except branches
Special Microcontroller Features:
Internal and external oscillator options
- Precision Internal 4 MHz oscillator factory
calibrated to 1%
- Low Power Internal 37 kHz oscillator
- External Oscillator support for crystals and
resonators.
Power saving SLEEP mode
Programmable weak pull-ups on PORTB
Multiplexed Master Clear/Input-pin
Watchdog Timer with independent oscillator for
reliable operation
Low voltage programming
In-Circuit Serial ProgrammingTM (via two pins)
Programmable code protection
Brown-out Reset
Power-on Reset
Power-up Timer and Oscillator Start-up Timer
Wide operating voltage range. (2.0 - 5.5V)
Industrial and extended temperature range
High Endurance FLASH/EEPROM Cell
- 100,000 write FLASH endurance
- 1,000,000 write EEPROM endurance
- 100 year data retention
Low Power Features:
Standby Current:
- 100 nA @ 2.0V, typical
Operating Current:
- 12
A @ 32 kHz, 2.0V, typical
- 120
A @ 1 MHz, 2.0V, typical
Watchdog Timer Current
- 1
A @ 2.0V, typical
Timer1 oscillator current:
- 1.2
A @ 32 kHz, 2.0V, typical
Dual Speed Internal Oscillator:
- Run-time selectable between 4 MHz and
37 kHz
- 4
s wake-up from SLEEP, 3.0V, typical
Peripheral Features:
16 I/O pins with individual direction control
High current sink/source for direct LED drive
Analog comparator module with:
- Two analog comparators
- Programmable on-chip voltage reference
(V
REF
) module
- Selectable internal or external reference
- Comparator outputs are externally accessible
Timer0: 8-bit timer/counter with 8-bit
programmable prescaler
Timer1: 16-bit timer/counter with external crystal/
clock capability
Timer2: 8-bit timer/counter with 8-bit period regis-
ter, prescaler and postscaler
Capture, Compare, PWM module
- 16-bit Capture/Compare
- 10-bit PWM
Addressable Universal Synchronous/Asynchro-
nous Receiver/Transmitter USART/SCI
Device
Program
Memory
Data Memory
I/O
CCP
(PWM)
USART
Comparators
Timers
8/16-bit
FLASH
(words)
SRAM
(bytes)
EEPROM
(bytes)
PIC16F627A
1024
224
128
16
1
Y
2
2/1
PIC16F628A
2048
224
128
16
1
Y
2
2/1
PIC16F648A
4096
256
256
16
1
Y
2
2/1
18-pin FLASH-Based 8-Bit CMOS Microcontrollers
2002 Microchip Technology Inc.
Preliminary
DS40044A-page 3
PIC16F627A/628A/648A
Table of Contents
1.0
General Description...................................................................................................................................................................... 5
2.0
PIC16F627A/628A/648A Device Varieties ................................................................................................................................... 7
3.0
Architectural Overview ................................................................................................................................................................. 9
4.0
Memory Organization ................................................................................................................................................................. 15
5.0
I/O Ports ..................................................................................................................................................................................... 31
6.0
Timer0 Module ........................................................................................................................................................................... 45
7.0
Timer1 Module ........................................................................................................................................................................... 48
8.0
Timer2 Module ........................................................................................................................................................................... 52
9.0
Capture/Compare/PWM (CCP) Module ..................................................................................................................................... 55
10.0 Comparator Module.................................................................................................................................................................... 61
11.0 Voltage Reference Module......................................................................................................................................................... 67
12.0 Universal Synchronous Asynchronous Receiver Transmitter (USART) Module........................................................................ 69
13.0 Data EEPROM Memory ............................................................................................................................................................. 89
14.0 Special Features of the CPU...................................................................................................................................................... 93
15.0 Instruction Set Summary .......................................................................................................................................................... 111
16.0 Development Support............................................................................................................................................................... 125
17.0 Electrical Specifications............................................................................................................................................................ 131
18.0 DC and AC Characteristics Graphs and Tables....................................................................................................................... 147
19.0 Packaging Information.............................................................................................................................................................. 149
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