Datasheet

PIC16F627A/628A/648A

4.2.2.6 PCON Register

The PCON register contains flag bits to differentiate

between a Power-on Reset, an external MCLR

Reset,

WDT Reset or a Brown-out Reset.

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 is

cleared, 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 R/W-1 U-0 R/W-0 R/W-x

— — — — OSCF —PORBOR

bit 7 bit 0

bit 7-4 Unimplemented: Read as ‘0’

bit 3 OSCF: INTOSC Oscillator Frequency bit

1 = 4 MHz typical

0 = 48 kHz typical

bit 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