PIC16F-ESLASHML datasheet(29/178 Pages) MICROCHIP

29 / 178 page

DS40044F-page 27

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.

PCON – POWER CONTROL REGISTER (ADDRESS: 8Eh)

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

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

the

Configuration Word).

U-0

R/W-1

U-0

R/W-0

R/W-x

—

OSCF

—POR

BOR

bit 7

bit 0

bit 7-4

Unimplemented: Read as ‘0’

bit 3

OSCF: INTOSC Oscillator Frequency bit

= 4 MHz typical

= 48 kHz typical

bit 2

Unimplemented: Read as ‘0’

bit 1

POR: Power-on Reset Status bit

= No Power-on Reset occurred

= A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)

bit 0

BOR: Brown-out Reset Status bit

= No Brown-out Reset occurred

= 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

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