PIC16F873AT-I/ML 데이터 시트보기 (PDF) - Microchip Technology

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PIC16F873AT-I/ML

28/40/44-Pin Enhanced Flash Microcontrollers

Microchip Technology 

PIC16F87XA

2.2.2.8 PCON Register

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.

Note:

BOR is unknown on Power-on Reset. 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 dis-

abled (by clearing the BODEN bit in the

configuration word).

REGISTER 2-8: PCON REGISTER (ADDRESS 8Eh)

U-0

U-0

U-0

U-0

U-0

U-0

R/W-0 R/W-1

—

—

—

—

—

—

POR

BOR

bit 7

bit 0

bit 7-2

bit 1

bit 0

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

 2003 Microchip Technology Inc.

DS39582B-page 29

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