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STM32L031: wake up condition and GPIO output in stop mode

Question asked by vu.andy on May 2, 2018
Latest reply on May 2, 2018 by Szymon Panecki

I have a couple of questions regarding the state of the GPIO output and the wake up condition in stop mode that I could not find in the datasheet.


When the uProcessor is specifically in stop mode,

1. Can it be woken up by the IWDG?  The data sheet mentions various sources such as EXT, ... but nothing mentioned about the IWDG in stop mode.

2. Once the uProcessor enters stop mode, what would happen to the GPIO output?  Will they be in HiZ?  Or they retain their states, either hi or lo, just before going into stop mode?