PIC16C63A/65B/73B/74B
4.2.2.8
PCON Register
Note:
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.
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 4-8:
PCON REGISTER (ADDRESS 8Eh)
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
R/W-0
POR
R/W-q
BOR
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)
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
W = Writable bit
’1’ = Bit is set
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
x = Bit is unknown
bit 0
2000 Microchip Technology Inc.
DS30605C-page 25
MICROCHIP [ MICROCHIP TECHNOLOGY ]
