PIC24F08KA102-I Datasheet, PDF (195/278 Pages) Microchip Technology – 20/28-Pin General Purpose, 16-Bit Flash Microcontrollers with nanoWatt XLP Technology

PIC24F16KA102 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
FCKSM1
FCKSM0 SOSCSEL POSCFREQ1 POSCFREQ0 OSCIOFNC
bit 7
R/P-1
POSCMD1
R/P-1
POSCMD0
bit 0
Legend:
R = Readable bit
-n = Value at POR
P = Programmable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-6
bit 5
bit 4-3
bit 2
bit 1-0
FCKSM<1:0>: 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
SOSCSEL: Secondary Oscillator Select bit
1 = Secondary oscillator is configured for high-power operation
0 = Secondary oscillator is configured for low-power operation
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
OSCIOFNC: CLKO Enable Configuration bit
1 = CLKO output signal 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>: 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
 2008-2011 Microchip Technology Inc.
DS39927C-page 195