Low

Power Clock Management:

// Configure for low-power operation
scg->sirccsr |= SIRC_LOW_POWER_MODE;  // Enable low-power SIRC
scg->sosccsr &= ~SOSC_ENABLE;         // Disable external oscillator
scg->firccsr &= ~FIRC_ENABLE;         // Disable high-frequency IRC

參閱

MCXA153 Reference Manual, Chapter: System Clock Generator (SCG)

Clock Management Unit for advanced clock control features

Power Management Unit for clock-power coordination

Reset Controller for clock-reset sequencing requirements

註

Register Access Requirements:

• Some registers require unlock sequences before modification
• Clock source changes may have settling time requirements
• Critical registers may be write-protected in certain modes
• Always verify clock stability before relying on new configuration

Performance Considerations:

• Internal oscillators may require calibration for precision applications
• External crystal selection affects system timing accuracy
• Clock switching may introduce brief timing discontinuities
• Temperature and voltage variations affect internal oscillator frequency