Advanced Topics

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Power Management

Power management is crucial for battery-operated devices and energy-efficient applications. Understanding different power modes and techniques can significantly extend battery life.

Power Saving Techniques

1. Sleep Modes

// Enable sleep mode
void enableSleep() {
    // Set sleep mode to power down
    SMCR |= (1 << SM1);
    
    // Enable sleep
    SMCR |= (1 << SE);
    
    // Enter sleep mode
    asm volatile("sleep");
}

// Wake up on interrupt
ISR(INT0_vect) {
    // Disable sleep
    SMCR &= ~(1 << SE);
}

2. Power Reduction Techniques

  • Disable unused peripherals
  • Optimize clock frequency
  • Use interrupts instead of polling
  • Implement duty cycling