This anomaly applies to Revision 2, build code CAAA-Bxx.
It was inherited from the previous SoC revision Revision 1.
Symptoms
Tasks connected to RTC COMPARE event through PPI are triggered twice per compare match.
Conditions
RTC registers are being accessed by CPU while RTC is running.
Consequences
Tasks connected to RTC COMPARE event through PPI are triggered more often than expected.
Workaround
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.