PIC14000 datasheet(22/153 Pages) MICROCHIP

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PIC14000

DS40122B-page 22

Preliminary

4.2.2.6

PCON REGISTER

The Power Control (PCON) register status contains

2 ﬂag bits to allow differentiation between a Power-on

Reset, an external MCLR reset, WDT reset, or low-volt-

age condition (Figure 4-8).

These bits are cleared on POR. The user must set

these bits following POR. On a subsequent reset if

POR is cleared, this is an indication that the reset was

due to a power-on reset condition.

Note: LVD is unknown on Power-on Reset. It

must then be set by the user and checked

on subsequent resets to see if LVD is

cleared, indicating a low voltage condition

has occurred.

FIGURE 4-8:

PCON REGISTER

bit7

bit0

LVD

—

POR

LVD:

Low Voltage Detect Flag

1 = A low-voltage detect condition has not occurred.

0 = A low-voltage detect condition has occurred.

Software must set this bit after a

power-on-reset condition has occurred.

Reserved. Bit 7 is reserved. This bit should be

R/W

—

W: Writable

Readable

Unimplemented,

read as ‘0’

Address:

8Eh

POR value:

0000_000xb

POR:

Power on Reset Flag

1 = A power on reset condition has not occurred.

0 = A power on reset condition has occurred.

Software must set this bit after a

power-on-reset condition has occurred.

Reset must be due to some other source

(WDT, MCLR).

programmed as ‘0’ .

Unimplemented. Read as ‘0’

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