[132] CLOCK: The LFRC oscillator might not start

This anomaly applies to IC Rev. Rev 1, build codes QFAA-B00, QFAB-B00, CIAA-B00.

It was inherited from the previous IC revision Engineering C.

Symptoms

The LFRC oscillator does not start and the LFCLKSTARTED event is not triggered.

Conditions

The LFRC oscillator is started in the window [66 µs, 138 µs] after the LFRC oscillator has stopped.

Consequences

The LFRC oscillator might become non-functional until it is reset.

Workaround

Delay starting the LFRC oscillator if it was last stopped [66 µs, 138 µs] ago.


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