PIC16F871 Microchip Technology Inc., PIC16F871 Datasheet - Page 25

• Manufacturer Part Number: PIC16F871
• Description: 28/40-pin, 8-bit Cmos Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

2.2.2.8
The Power Control (PCON) register contains flag bits
to allow differentiation between a Power-on Reset
(POR), a Brown-out Reset (BOR), a Watchdog Reset
(WDT) and an external MCLR Reset.
REGISTER 2-8:
 2003 Microchip Technology Inc.
Note:
bit 7-2
bit 1
bit 0
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 dis-
abled (by clearing the BOREN bit in the
configuration word).
PCON Register
PCON REGISTER (ADDRESS: 8Eh)
bit 7
Unimplemented: Read as '0'
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)
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)
Legend:
R = Readable bit
- n = Value at POR
U-0
—
U-0
—
U-0
—
W = Writable bit
‘1’ = Bit is set
U-0
—
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
U-0
—
PIC16F870/871
U-0
—
x = Bit is unknown
R/W-0
POR
DS30569B-page 23
R/W-1
BOR
bit 0