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MKE02Z32 GPIO Problem 

Question asked by Bernadett Marton on Oct 14, 2016
Latest reply on Oct 17, 2016 by Mark Butcher

Hi Everybody,


I am working with MKE02Z32 MCU, and had a Problem discovered which I cannot explain.

I toggle one GPIO output (1st) in a 250ms Timerinterrupt and in my main Loop I set another GPIO output (2nd).

This 2nd disturbes the 1st GPIO signal. Instead of clear squer signal, I measure disturbances (see Picture).

I could reproduce this behaviour also in FRDM-KE02Z evaulation board with the demonstration SW package.

Have anyone meet with something similar? I would like to have an explanation for this phenomenon, and how to avoid it.

Thanks in advance!