This anomaly applies to IC Rev. Engineering C, build codes CKAA-CA0, QIAA-CA0.
Tasks connected to RTC COMPARE event through PPI are triggered twice per compare match.
RTC registers are being accessed by CPU while RTC is running.
Tasks connected to RTC COMPARE event through PPI are triggered more often than expected.
Do not access the RTC registers, including the COMPARE event register, from CPU while waiting for the RTC COMPARE event. Note that CPU interrupt from this event can still be enabled.