PIC24F16KA101-ISLASHML datasheet(64/254 Pages) MICROCHIP

64 / 254 page

PIC24F16KA102 FAMILY

DS39927B-page 62

Preliminary

7.5.2

DETECTING BOR

When BOR is enabled, the BOR bit (RCON<1>) is

always reset to ‘1’ on any BOR or POR event. This

makes it difficult to determine if a BOR event has

occurred just by reading the state of BOR alone. A

more reliable method is to simultaneously check the

state of both POR and BOR. This assumes that the

POR and BOR bits are reset to ‘0’ in the software

immediately after any POR event. If the BOR bit is ‘1’

while POR is ‘0’, it can be reliably assumed that a BOR

event has occurred.

7.5.3

DISABLING BOR IN SLEEP MODE

When BOREN<1:0> = 10, BOR remains under hard-

ware control and operates as previously described.

However, whenever the device enters Sleep mode,

BOR is automatically disabled. When the device

returns to any other operating mode, BOR is

automatically re-enabled.

This mode allows for applications to recover from

brown-out situations, while actively executing code,

when the device requires BOR protection the most. At

the same time, it saves additional power in Sleep mode

by eliminating the small incremental BOR current.

Note:

Even when the device exits from Deep

Sleep mode, both the POR and BOR are

set.

PIC24F16KA101-I/ML Datasheet(PDF) 64 Page - Microchip Technology