16-Bit Oscillator System: Secondary Oscillator (SOSC)

The Secondary Oscillator (SOSC) is designed specifically for low-power operation with an external 32 to 100 KHz crystal. The oscillator is connected to the SOSCO and SOSCI device pins and serves as a secondary crystal clock source for low-power operation. It can also drive Timer1 and/or the Real-Time Clock and Calendar (RTCC) module for Real-Time Clock (RTC) applications.


Code Example:

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

#include <xc.h>

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

int main(void)
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