This anomaly applies to Revision 1, build codes LACA-A0A.
It was inherited from the previous IC revision Engineering A.
Symptoms
NRF_POWER->EVENT_SLEEPENTER and NRF_POWER->EVENT_SLEEPEXIT are asserted.
Conditions
After device reset.
Consequences
NRF_POWER->EVENT_SLEEPENTER and NRF_POWER->EVENT_SLEEPEXIT registers are set to true after reset.
Workaround
After reset, NRF_POWER->EVENT_SLEEPENTER and NRF_POWER->EVENT_SLEEPEXIT must be cleared before enabling them as IRQ sources.