Datasheet

PIC16F72

2.2.2.6 PCON Register

The Power Control (PCON) register contains a flag bit

to allow differentiation between a Power-on Reset

(POR), a Brown-out Reset, an external MCLR Reset

and WDT Reset.

Note: Interrupt flag bits get set when an interrupt

condition occurs, regardless of the state of

its corresponding enable bit or the global

enable bit, GIE (INTCON<7>). User soft-

ware should ensure the appropriate inter-

rupt flag bits are clear prior to enabling an

interrupt.

Note: BOR is unknown on Power-on Reset. It

must then be set by the user and checked

on subsequent RESETS to see if BOR

clear, indicating a brown-out has occurred.

The BOR status bit is a ‘don't care’ and is

not necessarily predictable if the brown-out

circuit is disabled (by clearing the BOREN

bit in the Configuration word).

U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-x

— — — — — —PORBOR

bit 7 bit 0

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)

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

- n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown