11.1.1.5.1 SOSC Start-Up Timing

The SOSC utilizes the Oscillator Start-up Timer (OST) to ensure that the 32.768 kHz crystal oscillator has started and is available for use. Since crystal oscillators do not start immediately and may take a few hundred cycles before achieving stable operation, the OST counts 1024 oscillation periods from the SOSCI input. Once the OST completes its count, module hardware sets the Secondary Oscillator Ready (SOR) bit, indicating that the SOSC is stable and ready to use.