16F628 datasheet(158/168 Pages) MICROCHIP

158 / 168 page

PIC16F627A/628A/648A

DS40044A-page 156

Preliminary

 2002 Microchip Technology Inc.

APPENDIX C: DEVICE MIGRATIONS

This section describes the functional and electrical

specification differences when migrating between func-

tionally similar devices. (such as from a PIC16F627 to

a PIC16F627A).

C.1

PIC16F627/628 to a PIC16F627A/628A

ER mode is now RC mode.

Code Protection for the Program Memory has

changed from Code Protect sections of memory

to Code Protect of the whole memory. The Con-

figuration bits CP0 and CP1 in the PIC16F627/

628 do not exist in the PIC16F627A/628A. They

have been replaced with one Configuration

bit<13> CP.

“Brown-out Detect (BOD)” terminology has

changed to “Brown-out Reset (BOR)” to better

represent the function of the Brown-out circuitry.

Enabling Brown-out Reset (BOR) does not auto-

matically enable the Power-up Timer (PWRT)

the way it did in the PIC16F627/628.

INTRC is now called INTOSC.

Timer1

Oscillator

now

designed

for

32.768 kHz operation. In the PIC16F627/628

the Timer1 Oscillator was designed to run up to

200 kHz.

The Dual Speed Oscillator mode only works in

the INTOSC Oscillator mode. In the PIC16F627/

628 the Dual Speed Oscillator mode worked in

both the INTRC and ER Oscillator modes.

APPENDIX D: MIGRATING FROM

OTHER PICmicro

DEVICES

This discusses some of the issues in migrating from

other PICmicro devices to the PIC16F627A/628A/648A

family of devices.

D.1

PIC16C62X/CE62X to PIC16F627A/628A/

648A Migration

See

Microchip

web

site

for

availability

(www.microchip.com).

D.2

PIC16C622A to PIC16F627A/628A/648A

Migration

See

Microchip

web

site

for

availability

(www.microchip.com).

Note:

This device has been designed to perform

to the parameters of its data sheet. It has

been tested to an electrical specification

designed to determine its conformance

with these parameters. Due to process

differences in the manufacture of this

device, this device may have different

performance characteristics than its earlier

version. These differences may cause this

device to perform differently in your

application than the earlier version of this

device.

16F628 Datasheet(PDF) 158 Page - Microchip Technology

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