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PIC16F627A/628A/648A

Data Sheet

Flash-Based, 8-Bit CMOS

Microcontrollers with nanoWatt Technology

2007 Microchip Technology Inc.

DS40044F

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

knowledge, 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. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts

allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device

applications and the like is provided only for your convenience

and may be superseded by updates. It is your responsibility to

ensure that your application meets with your specifications.

MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR

IMPLIED, WRITTEN OR ORAL, STATUTORY OR

OTHERWISE, RELATED TO THE INFORMATION,

INCLUDING BUT NOT LIMITED TO ITS CONDITION,

QUALITY, PERFORMANCE, MERCHANTABILITY OR

FITNESS FOR PURPOSE. Microchip disclaims all liability

arising from this information and its use. Use of Microchip

devices in life support and/or safety applications is entirely at

the buyer’s risk, and the buyer agrees to defend, indemnify and

hold harmless Microchip from any and all damages, claims,

suits, or expenses resulting from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron,

dsPIC, K

, K

logo, microID, MPLAB, PIC,

PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and

SmartShunt are registered trademarks of Microchip

Technology Incorporated in the U.S.A. and other countries.

AmpLab, FilterLab, Linear Active Thermistor, Migratable

Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor

and The Embedded Control Solutions Company are

registered trademarks of Microchip Technology Incorporated

in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard,

dsPICDEM, dsPICDEM.net, dsPICworks, ECAN,

ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,

In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi,

MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit,

PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal,

PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB,

rfPICDEM, Select Mode, Smart Serial, SmartTel, Total

Endurance, UNI/O, WiperLock and ZENA are trademarks of

Microchip Technology Incorporated in the U.S.A. and other

countries.

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.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 certification for its worldwide

headquarters, design and wafer fabrication facilities in Chandler and

Tempe, Arizona, Gresham, Oregon and Mountain View, California. The

Company’s quality system processes and procedures are for its PIC

MCUs and dsPIC

DSCs, K

code hopping devices, Serial

EEPROMs, microperipherals, nonvolatile memory and analog

products. In addition, Microchip’s quality system for the design and

manufacture of development systems is ISO 9001:2000 certified.

DS40044F-page ii

2007 Microchip Technology Inc.

PIC16F627A/628A/648A

18-pin Flash-Based, 8-Bit CMOS Microcontrollers

with nanoWatt Technology

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

Low-Power Features:

• Standby Current:

- 100 nA @ 2.0V, typical

• Operating Current:

- 12

μA

@ 32 kHz, 2.0V, typical

- 120

μA

@ 1 MHz, 2.0V, typical

• Watchdog Timer Current:

- 1

μA

@ 2.0V, typical

• Timer1 Oscillator Current:

- 1.2

μA

@ 32 kHz, 2.0V, typical

• Dual-speed Internal Oscillator:

- Run-time selectable between 4 MHz and

48 kHz

- 4

μs

wake-up from Sleep, 3.0V, typical

Special Microcontroller Features:

• Internal and external oscillator options:

- Precision internal 4 MHz oscillator factory

calibrated to ±1%

- Low-power internal 48 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 Programming™ (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

- 40 year data retention

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

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

• Capture, Compare, PWM module:

- 16-bit Capture/Compare

- 10-bit PWM

• Addressable Universal Synchronous/Asynchronous

Receiver/Transmitter USART/SCI

Device

Program

Memory

Flash

(words)

1024

2048

4096

Data Memory

SRAM

(bytes)

224

256

EEPROM

(bytes)

128

256

I/O

CCP

(PWM)

USART Comparators

Timers

8/16-bit

2/1

PIC16F627A

PIC16F628A

PIC16F648A

2007 Microchip Technology Inc.

DS40044F-page 1

PIC16F627A/628A/648A

Pin Diagrams

PDIP, SOIC

RA2/AN2/V

REF

RA3/AN3/CMP1

RA4/T0CKI/CMP2

RA5/MCLR/V

RB0/INT

RB1/RX/DT

RB2/TX/CK

RB3/CCP1

PIC16F627A/628A/648A

27A/628A/648A

RA1/AN1

RA0/AN0

RA7/OSC1/CLKIN

RA6/OSC2/CLKOUT

RB7/T1OSI/PGD

RB6/T1OSO/T1CKI/PGC

RB5

RB4/PGM

RA1/AN1

RA0/AN0

RA7/OSC1/CLKIN

RA6/OSC2/CLKOUT

RB7/T1OSI/PGD

RB6/T1OSO/T1CKI/PGC

RB5

RB4/PGM

SSOP

28-Pin QFN

RA4/T0CKI/CMP2

RA3/AN3/CMP1

RA2/AN2/V

REF

RA5/MCLR/V

PIC16F627A/628A/648A

RA2/AN2/V

REF

RA3/AN3/CMP1

RA4/T0CKI/CMP2

RA5/MCLR/V

RB0/INT

RB1/RX/DT

RB2/TX/CK

RB3/CCP1

RB1/RX/DT

RB2/TX/CK

RB3/CCP1

NC 11

RB4/PGM

RB5

NC 14

NC 2

NC 4

PIC16F627A/628A

18 NC

PIC16F648A

NC 6

RB0/INT

25 NC

22 NC

RA1/AN1

RA0/AN0

RA7/OSC1/CLKIN

RA6/OSC2/CLKOUT

RB7/T1OSI/PGD

RB6/T1OSO/T1CKI/PGC

DS40044F-page 2

2007 Microchip Technology Inc.

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....................................................................... 71

13.0 Data EEPROM Memory ............................................................................................................................................................ 89

14.0 Special Features of the CPU..................................................................................................................................................... 95

15.0 Instruction Set Summary ......................................................................................................................................................... 115

16.0 Development Support.............................................................................................................................................................. 129

17.0 Electrical Specifications........................................................................................................................................................... 133

18.0 DC and AC Characteristics Graphs and Tables...................................................................................................................... 149

19.0 Packaging Information............................................................................................................................................................. 161

Appendix A: Revision History............................................................................................................................................................ 167

Appendix B: Device Differences ....................................................................................................................................................... 167

Appendix C: Device Migrations - PIC16C63/65A/73A/74A —> PIC16C63A/65B/73B/74B .............................................................. 168

Appendix D: Migration from Baseline to Mid-Range Devices ........................................................................................................... 168

The Microchip Web Site .................................................................................................................................................................... 169

Customer Change Notification Service ............................................................................................................................................. 169

Customer Support ............................................................................................................................................................................. 169

Reader Response ............................................................................................................................................................................. 170

Product Identification System ........................................................................................................................................................... 175

TO OUR VALUED CUSTOMERS

It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Micro-

chip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined

and enhanced as new volumes and updates are introduced.

If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via

E-mail at

docerrors@microchip.com

or fax the

Reader Response Form

in the back of this data sheet to (480) 792-4150. We

welcome your feedback.

Most Current Data Sheet

To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:

http://www.microchip.com

You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.

The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).

Errata

An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current

devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision

of silicon and revision of document to which it applies.

To determine if an errata sheet exists for a particular device, please check with one of the following:

• Microchip’s Worldwide Web site; http://www.microchip.com

• Your local Microchip sales office (see last page)

When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are

using.

Customer Notification System

www.microchip.com

to receive the most current information on all of our products.

2007 Microchip Technology Inc.

DS40044F-page 3