PIC16F84A datasheet(47/337 Pages) MICROCHIP

47 / 337 page

DS30234D-page 47

PIC16C6X

4.2.2.8

PCON REGISTER

The Power Control register (PCON) contains a ﬂag bit

to allow differentiation between a Power-on Reset to an

external MCLR reset or WDT reset. Those devices with

brown-out detection circuitry contain an additional bit to

differentiate a Brown-out Reset condition from a

Power-on Reset condition.

Applicable Devices

61 62 62A R62 63 R63 64 64A R64 65 65A R65 66 67

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 Conﬁguration word).

FIGURE 4-22:

PCON REGISTER FOR PIC16C62/64/65 (ADDRESS 8Eh)

FIGURE 4-23: PCON REGISTER FOR PIC16C62A/R62/63/R63/64A/R64/65A/R65/66/67

(ADDRESS 8Eh)

U-0

R/W-0

R/W-q

—

POR

—

= Readable bit

W = Writable bit

= Unimplemented bit,

read as ‘0’

- n = Value at POR reset

= value depends on conditions

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:

Reserved

This bit should be set upon a Power-on Reset by user software and maintained as set. Use of this bit as a general

purpose read/write bit is not recommended, since this may affect upward compatibility with future products.

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

= value depends on conditions

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)

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