Errata nRF52832 - WDT: Increased current consumption when configured to pause in System ON idle

This anomaly applies to IC Rev. Engineering C, build codes CHAA-BA0, CIAA-BA0, QFAA-BB0.

It was inherited from the previous IC revision Engineering B.

Symptoms

Using the mode where watchdog is paused in CPU Idle, the current consumption jumps from 3 µA to 400 µA.

When we enable WDT with the CONFIG option to pause when CPU sleeps:


NRF_WDT->CONFIG = (WDT_CONFIG_SLEEP_Pause<<WDT_CONFIG_SLEEP_Pos);

Reduced battery life.

Do not enter System ON IDLE within 125 µs after reloading the watchdog.