PIC16F87 datasheet(24/230 Pages) MICROCHIP

24 / 230 page

PIC16F87/88

DS30487D-page 24

 2002-2013 Microchip Technology Inc.

2.2.2.8

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.

PCON: POWER CONTROL REGISTER (ADDRESS 8Eh)

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

software should ensure the appropriate

interrupt 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 is

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

R/W-0

R/W-x

—

—POR

BOR

bit 7

bit 0

bit 7-2

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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