PIC16F872 Datasheet, PDF (19/160 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS FLASH Microcontroller

2.2.2.8 PCON REGISTER
The Power Control (PCON) Register contains flag bits
to allow differentiation between a Power-on Reset
(POR), a Brown-out Reset (BOR), a Watch-dog Reset
(WDT) and an external MCLR Reset.
PIC16F872
Note:
BOR is unknown on POR. It must be set by
the user and checked on subsequent
resets to see if BOR is clear, indicating a
brown-out has occurred. The BOR status
bit is a don’t care and is not predictable if
the brown-out circuit is disabled (by clear-
ing the BODEN bit in the configuration
word).
REGISTER 2-8: PCON REGISTER (ADDRESS 8Eh)
U-0
U-0
U-0
U-0
U-0
U-0 R/W-0 R/W-1
—
—
—
—
—
bit7
—
POR BOR R = Readable bit
bit0 ^{W = Writable bit}
U = Unimplemented bit,
read as ‘0’
- n= Value at POR reset
bit 7-2: Unimplemented: Read as '0'
bit 1:
POR: Power-on Reset Status bit
1 = No Power-on Reset occurred
0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)
bit 0:
BOR: Brown-out Reset Status bit
1 = No Brown-out Reset occurred
0 = A Brown-out Reset occurred (must be set in software after a Brown-out Reset occurs)
© 1999 Microchip Technology Inc.
Preliminary
DS30221A-page 19