PIC24FXXKA2XX

DS39991A-page 16

 2010 Microchip Technology Inc.

FWPSA

FWDT<4>

WDT Prescaler

1

= WDT prescaler ratio of 1:128

0

= WDT prescaler ratio of 1:32

FWDTEN

FWDT<7>

Watchdog Timer Enable bit

1

= WDT is enabled

0

= WDT is disabled (control is placed on the SWDTEN bit)

GSS0

FGS<1>

General Segment Code Flash Code Protection bit

1

= No protection

0

= Standard security is enabled

GWRP

FGS<0>

General Segment Code Flash Write Protection bit

1

= General segment may be written

0

= General segment is write-protected

ICS<1:0>

FICD<1:0>

ICD Pin Placement Select bit

11

= Reserved; do not use

10

= PGEC2/PGED2 are used for ICSP programming

01

= PGEC3/PGED3 are used for ICSP programming

00

= Reserved; do not use

IESO

FOSCSEL<7>

Internal External Switchover bit

1

= Internal External Switchover mode is enabled (Two-Speed Start-up

enabled)

0

= Internal External Switchover mode is disabled (Two-Speed Start-up disabled)

FPOR<7>

1

= MCLR pin is enabled; RA5 input pin is disabled

0

= RA5 input pin is enabled; MCLR is disabled

OSCIOFNC

FOSC<2>

CLKO Enable Configuration bit

1

= CLKO output signal is active on the OSCO pin; primary oscillator must be

disabled or configured for the External Clock mode (EC) for the CLKO to

be active (POSCMD<1:0> = 11 or 00)

0

= CLKO output is disabled

POSCMD<1:0>

FOSC<1:0>

Primary Oscillator Configuration bits

11

= Primary oscillator disabled

10

= HS Oscillator mode selected (4 MHz-25 MHz)

01

= XT Oscillator mode selected (100 kHz-4 MHz)

00

= External Clock mode selected

POSCFREQ<1:0> FOSC<4:3>

Primary Oscillator Frequency Range Configuration bits

11

= Primary oscillator/external clock input frequency is greater than 8 MHz

10

= Primary oscillator/external clock input frequency is between 100 kHz and

8MHz

01

= Primary oscillator/external clock input frequency is less than 100 kHz

00

= Reserved; do not use

PWRTEN

FPOR<3>

Power-up Timer Enable bit

0

= PWRT is disabled

1

= PWRT is enabled

SOSCSEL

FOSC<5>

Secondary Oscillator Select bit

1

= Secondary oscillator is configured for high-power operation

0

= Secondary oscillator is configured for low-power operation

TABLE 3-8:

PIC24FXXKA2XX FAMILY CONFIGURATION BITS DESCRIPTION (CONTINUED)

Bit Field

Register

Description

Note 1:

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