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PIC16C71X

DS30272A-page 22

1997 Microchip Technology Inc.

4.2.2.6

PCON REGISTER

The Power Control (PCON) register contains a ag bit

to allow differentiation between a Power-on Reset

(POR) to an external MCLR Reset or WDT Reset.

Those devices with brown-out detection circuitry con-

tain an additional bit to differentiate a Brown-out Reset

(BOR) condition from a Power-on Reset condition. For

the PIC16C715 the PCON register also contains status

bits MPEEN and PER. MPEEN reects the value of the

MPEEN bit in the conguration word. PER indicates a

parity error reset has occurred.

Applicable Devices

710 71 711 715

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 BODEN

bit in the Conguration word).

FIGURE 4-12: PCON REGISTER (ADDRESS 8Eh), PIC16C710/711

FIGURE 4-13: PCON REGISTER (ADDRESS 8Eh), PIC16C715

U-0

R/W-0

R/W-q

—

POR

BOR

= Readable bit

W = Writable bit

= Unimplemented bit,

read as ‘0’

- n = Value at POR reset

bit7

bit0

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)

R-U

U-0

R/W-1

R/W-0

R/W-q

MPEEN

—

PER

POR

BOR(1)

= Readable bit

W = Writable bit

= Unimplemented bit,

read as ‘0’

- n = Value at POR reset

bit7

bit0

bit 7:

MPEEN: Memory Parity Error Circuitry Status bit

Reects the value of conguration word bit, MPEEN

bit 6-3:

Unimplemented: Read as '0'

bit 2:

PER: Memory Parity Error Reset Status bit

1 = No Error occurred

0 = Program Memory Fetch Parity Error occurred (must be set in software after a Parity Error Reset)

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)

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