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What could cause the NMI interrupt to be ignored?

Question asked by Javier Cardona on Feb 2, 2017
Latest reply on Feb 7, 2017 by Kerry Zhou

In our KL27-based design we have a button connected to the NMI line and the interrupt is triggered successfully when the button is pressed. After several successful triggers, the NMI handler will not be called anymore.  We have double checked that the PIN_Mux configuration for the NMI pin is sill valid.


That interrupt needs not be acknowledged, and by definition, cannot be masked...


Can anyone suggest how we can troubleshoot this?




Kyle Manna