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PIC16F627A/628A/648A
DS40044G-page 172
2009 Microchip Technology Inc.
APPENDIX C:
DEVICE MIGRATIONS
This section describes the functional and electrical
specification differences when migrating between
functionally similar devices. (such as from a
PIC16F627 to a PIC16F627A).
C.1
PIC16F627/628
to a PIC16F627A/
628A
1.
ER mode is now RC mode.
2.
Code protection for the program memory has
changed from code-protect sections of memory
to code-protect of the whole memory. The
configuration 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.
3.
“Brown-out Detect (BOD)” terminology has
changed to “Brown-out Reset (BOR)” to better
represent the function of the Brown-out circuitry.
4.
Enabling Brown-out Reset (BOR) does not
automatically enable the Power-up Timer
(PWRT) the way it did in the PIC16F627/628.
5.
INTRC is now called INTOSC.
6.
Timer1
Oscillator
is
now
designed
for
32.768 kHz operation. In the PIC16F627/628,
the Timer1 oscillator was designed to run up to
200 kHz.
7.
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 PIC
DEVICES
This discusses some of the issues in migrating from
other PIC MCU 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.
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