Datasheet

 2011-2017 Microchip Technology Inc. DS30009995E-page 241
PIC24FV32KA304 FAMILY
REGISTER 26-4: FOSC: OSCILLATOR CONFIGURATION REGISTER
R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
FCKSM1 FCKSM0 SOSCSEL POSCFREQ1 POSCFREQ0 OSCIOFNC POSCMD1 POSCMD0
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6
FCKSM<1:0>: Clock Switching and Fail-Safe Clock 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
bit 5 SOSCSEL: Secondary Oscillator Power Selection Configuration bit
1 = Secondary oscillator is configured for high-power operation
0 = Secondary oscillator is configured for low-power operation
bit 4-3
POSCFREQ<1:0>: 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 8 MHz
01 = Primary oscillator/external clock input frequency is less than 100 kHz
00 = Reserved; do not use
bit 2
OSCIOFNC: 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
bit 1-0
POSCMD<1:0>: Primary Oscillator Configuration bits
11 = Primary Oscillator mode is disabled
10 = HS Oscillator mode is selected
01 = XT Oscillator mode is selected
00 = External Clock mode is selected