PIC24FJ16MC101_12 Datasheet, PDF (237/350 Pages) Microchip Technology – 16-bit Microcontrollers (up to 32 KB Flash and 2 KB SRAM)

PIC24FJ16MC101/102 AND PIC24FJ32MC101/102/104
TABLE 23-4: PIC24F CONFIGURATION BITS DESCRIPTION
Bit Field
Description
GCP
GWRP
IESO
PWMLOCK
WDTWIN<1:0>
FNOSC<2:0>
FCKSM<1:0>
IOL1WAY
OSCIOFNC
POSCMD<1:0>
FWDTEN
WINDIS
General Segment Code-Protect bit
1 = User program memory is not code-protected
0 = Code protection is enabled for the entire program memory space
General Segment Write-Protect bit
1 = User program memory is not write-protected
0 = User program memory is write-protected
Two-speed Oscillator Start-up Enable bit
1 = Start-up device with FRC, then automatically switch to the
user-selected oscillator source when ready
0 = Start-up device with user-selected oscillator source
PWM Lock Enable bit
1 = Certain PWM registers may only be written after key sequence
0 = PWM registers may be written without key
Watchdog Window Select bits
11 = WDT Window is 25% of WDT period
10 = WDT Window is 37.5% of WDT period
01 = WDT Window is 50% of WDT period
00 = WDT Window is 75% of WDT period
Oscillator Selection bits
111 = Fast RC Oscillator with divide-by-N (FRCDIVN)
110 = Reserved; do not use
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (Sosc)
011 = Primary Oscillator with PLL module (MS + PLL, EC + PLL)
010 = Primary Oscillator (MS, HS, EC)
001 = Fast RC Oscillator with divide-by-N with PLL module (FRCDIVN + PLL)
000 = Fast RC Oscillator (FRC)
Clock Switching Mode 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
Peripheral pin select configuration
1 = Allow only one reconfiguration
0 = Allow multiple reconfigurations
OSC2 Pin Function bit (except in MS and HS modes)
1 = OSC2 is clock output
0 = OSC2 is general purpose digital I/O pin
Primary Oscillator Mode Select bits
11 = Primary oscillator disabled
10 = HS Crystal Oscillator mode (10 MHz - 32 MHz)
01 = MS Crystal Oscillator mode (3 MHz - 10 MHz)
00 = EC (External Clock) mode (DC - 32 MHz)
Watchdog Timer Enable bit
1 = Watchdog Timer always enabled (LPRC oscillator cannot be disabled. Clearing the SWDTEN bit
in the RCON register will have no effect.)
0 = Watchdog Timer enabled/disabled by user software (LPRC can be disabled by clearing the
SWDTEN bit in the RCON register)
Watchdog Timer Window Enable bit
1 = Watchdog Timer in Non-Window mode
0 = Watchdog Timer in Window mode
WDTPRE
Watchdog Timer Prescaler bit
1 = 1:128
0 = 1:32
© 2011-2012 Microchip Technology Inc.
Preliminary
DS39997C-page 237