PIC16C641-04SLASHTQ datasheet(26/136 Pages) MICROCHIP

26 / 136 page

PIC16C64X & PIC16C66X

DS30559A-page 26

Preliminary

4.2.2.6

PCON REGISTER

The PCON register contains ﬂag bits to differentiate

between a Power-on Reset (POR), an external MCLR

reset, WDT reset, Brown-out Reset (BOR), and Parity

Error Reset (PER). The PCON register also contains a

status bit, MPEEN, which reﬂects the value of the

MPEEN bit in Conﬁguration Word. See Table 9-4 for

status of these bits on various resets.

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

programming the BODEN bit in the

Conﬁguration word).

FIGURE 4-10: PCON REGISTER (ADDRESS 8Eh)

R-U

U-0

R/W-1

R/W-0

R/W-u

MPEEN

—

—PER

POR

BOR

R= Readable bit

W= Writable bit

U= Unimplemented bit,

read as ‘0’

- n= Value at POR reset

bit7

bit0

bit 7:

MPEEN: Memory Parity Error Circuitry Status bit

Reﬂects the value of Conﬁguration 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 occurs)

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)

PIC16C641-04/TQ Datasheet(PDF) 26 Page - Microchip Technology

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