Reconfigure NMI Pin to Normal Pin in KEA-128

[vigneshbalaji]

Hi,

     I have the following questions  -

1)Is it possible to reconfigure NMI pin to Normal Pin?

2)How to Reconfigure NMI pin to a normal Pin? Can you please provide a snippet of code and documentation.

[Robin_Shen]

Hi VIGNESH BALAJI,

1)Is it possible to reconfigure NMI pin to Normal Pin?
Yes. SIM_SOPT0[NMIE] can be used to disable the NMI function.
But the PTB4 will be NMI function by default after MCU POR. If you want to reconfigure NMI pin to Normal Pin, you should keep the NMI pin to high in the outside circuit during power on reset.
Thus I don't recommend the customer to use the SWD and NMI pin to other functions.

2)How to Reconfigure NMI pin to a normal Pin? Can you please provide a snippet of code and documentation.

Clear the SIM_SOPT0[NMIE] bit after reset.

Best Regards,

Robin

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