[183] PWM: False SEQEND[0] and SEQEND[1] events

This anomaly applies to IC Rev. Engineering C, build codes QIAA-CA0, CKAA-CA0.

It was inherited from the previous IC revision Engineering B nRF52840.

Symptoms

False SEQEND[0] and SEQEND[1] events are being generated.

Conditions

Any of the LOOPSDONE_SEQSTARTn shortcuts are enabled. LOOP register is non-zero and sequence 1 is one value long.

Consequences

SEQEND[0] and SEQEND[1] events might falsely trigger other tasks if these are routed through the PPI.

Workaround

Avoid using the LOOPSDONE_SEQSTARTn shortcuts, when LOOP register is non-zero and sequence 1 is one value long.