[81] GPIO: PIN_CNF is not retained when in debug interface mode

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

GPIO pin configuration is reset on wakeup from System OFF.

Conditions

The system is in debug interface mode.

Consequences

GPIO state unreliable until PIN_CNF is reconfigured.