Developer Help

The LPRC Oscillator is separate from the Fast RC Oscillator. It oscillates at a nominal frequency of 31.25 kHz. The LPRC Oscillator is the clock source for the Power-up Timer (PWRT), Watchdog Timer (WDT), Fail-Safe Clock Monitor (FSCM) and Phase-Locked Loop (PLL) reference circuits. It may also be used to provide a low-frequency clock source option for the device in those applications where power consumption is critical and timing accuracy is not required.

Code Example:

The following MPLAB^® XC16 code example enables the LPRC as the default system clock for a PIC24FJ128GA010 MCU:

#include <xc.h>

#pragma config FNOSC = LPRC  // default System clock = LPRC

int main(void)
{
    ...
}