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DS39991A-page 15

PIC24FXXKA2XX

TABLE 3-8:

PIC24FXXKA2XX FAMILY CONFIGURATION BITS DESCRIPTION

Bit Field

Register

Description

BOREN<1:0>

FPOR<1:0>

Brown-out Reset Enable bits

11

= Brown-out Reset is enabled in hardware; SBOREN bit is disabled

10

= Brown-out Reset is enabled only while device is active and disabled in

Sleep; SBOREN bit is disabled

01

= Brown-out Reset controlled with the SBOREN bit setting

00

= Brown-out Reset is disabled in hardware; SBOREN bit is disabled

BORV<1:0>

FPOR<6:5>

Brown-out Reset Voltage bits

11

10

01

00

= Downside protection on POR enabled – “Zero-power” selected

DSWDTEN

FDS<7>

Deep Sleep Watchdog Timer Enable bit

1

= DSWDT is enabled

0

= DSWDT is disabled

DSWDTPS<3:0>

FDS<3:0>

Deep Sleep Watchdog Timer Postscale Select bits

The DSWDT prescaler is 32; this creates an approximate base time unit of

1ms.

1111

= 1:2,147,483,648 (25.7 days)

1110

= 1:536,870,912 (6.4 days)

1101

= 1:134,217,728 (38.5 hours)

1100

= 1:33,554,432 (9.6 hours)

1011

= 1:8,388,608 (2.4 hours)

1010

= 1:2,097,152 (36 minutes)

1001

= 1:524,288 (9 minutes)

1000

= 1:131,072 (135 seconds)

0111

= 1:32,768 (34 seconds)

0110

= 1:8,192 (8.5 seconds)

0101

= 1:2,048 (2.1 seconds)

0100

= 1:512 (528 ms)

0011

= 1:128 (132 ms)

0010

= 1:32 (33 ms)

0001

= 1:8 (8.3 ms)

0000

= 1:2 (2.1 ms)

DSZPBOR

FDS<6>

Deep Sleep Zero-Power BOR Enable bit

1

= Zero-Power BOR is enabled in Deep Sleep

0

= Zero-Power BOR is disabled in Deep Sleep (does not affect operation in

non Deep Sleep modes)

FCKSM<1:0>

FOSC<7:6>

Clock Switching and Monitor Selection Configuration bits

1x

= Clock switching is disabled, Fail-Safe Clock Monitor is disabled

01

= Clock switching is enabled, Fail-Safe Clock Monitor is disabled

00

= Clock switching is enabled, Fail-Safe Clock Monitor is enabled

FNOSC<2:0>

FOSCSEL<2:0> Oscillator Selection bits

000

= Fast RC Oscillator (FRC)

001

= Fast RC Oscillator with divide-by-N with PLL module (FRCDIV+PLL)

010

= Primary Oscillator (XT, HS, EC)

011

= Primary Oscillator with PLL module (HS+PLL, EC+PLL)

100

= Secondary Oscillator (SOSC)

101

= Low-Power RC Oscillator (LPRC)

110

= Reserved; do not use

111

= Fast RC Oscillator with divide-by-N (FRCDIV)

Note 1:

from accidentally locking out the device from low-voltage test entry.