KV46 GPIO PORTC4 setup as an output.

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KV46 GPIO PORTC4 setup as an output.

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bitjockey
Contributor II

I am setting up a GPIO PortC4 as an output (to drive a /MR input on an ADM8322). I set the output high when I go through port setup and initialization. What I see with is scope is narrow low pulses on the output even though I am not toggling, or otherwise changing the state of the output. This causes reset to be triggered by the ADM8322, and keeps the MCU resetting. I there anyway to keep the low going pulses from occurring?

Thanks,

Brian

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Robin_Shen
NXP TechSupport
NXP TechSupport

Hi Brian,

Sorry for the late reply!
For most digital pins, it keep the high impedance during reset phase, so you can add the external pull-up resistor to ensure it to be high level during reset.

Best Regards,

Robin

 

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