17.1.2 Interrupts During Doze

System behavior for interrupts that may occur during Doze mode are configured using the ROI and DOE bits. Refer to the example below for details about system behavior in all cases for a transition from Main to ISR back to Main.

Doze Software Example

// Mainline operation
bool somethingToDo = FALSE;

void main() {
    initializeSystem();
    // DOZE = 64:1 (for example) 
    // ROI = 1; 
    GIE = 1; // enable interrupts 
    while (1) {
        // If ADC completed, process data 
        if (somethingToDo) {
            doSomething();
            DOZEN = 1; // resume low-power 
        }
    }
}
// Data interrupt handler 

void interrupt() {
    // DOZEN = 0 because ROI = 1 
    if (ADIF) {
        somethingToDo = TRUE;
        DOE = 0; // make main() go fast 
        ADIF = 0;
    }
    // else check other interrupts... 
    if (TMR0IF) {
        timerTick++;
        DOE = 1; // make main() go slow 
        TMR0IF = 0;
    }
}

Note: User software can change the DOE bit in the ISR.