PIC16F87XA
2.2.2.8
PCON Register
Note: BOR is unknown on Power-on Reset. 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 clearing the BODEN bit in the
configuration word).
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:
PCON REGISTER (ADDRESS 8Eh)
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0
POR
R/W-1
BOR
—
—
—
—
—
—
bit 7
bit 0
bit 7-2
bit 1
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)
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)
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared x = Bit is unknown
- n = Value at POR
’1’ = Bit is set
2001 Microchip Technology Inc.
Advance Information
DS39582A-page 27
MICROCHIP [ MICROCHIP ]
