Conditional

IREF Control:

// Enable IREF based on application requirements
if (requires_precision_analog_monitoring()) {
    config.lpIREF = true;   // Keep precision for critical measurements
} else {
    config.lpIREF = false;  // Save power when precision not needed
}

警告

Analog Performance Impact:

• Disabling IREF reduces ADC accuracy and resolution
• Comparator thresholds may become less precise
• Temperature coefficient of references may increase
• Some analog circuits may not function properly without IREF

註

Wake-up Considerations:

• IREF re-enable during wake-up may require settling time
• First analog measurements after wake-up may be less accurate
• Consider pre-wake IREF enable for critical analog operations
• Some applications may benefit from IREF remaining always active

Power Budget Planning:

• IREF power consumption varies with temperature and process
• Consider IREF power in overall low-power mode budget
• Measure actual power consumption for specific application conditions
• Balance IREF power cost against analog performance requirements