KV46 GPIO PORTC4 setup as an output.

bitjockey — Tue, 24 Apr 2018 16:26:18 GMT

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

Re: KV46 GPIO PORTC4 setup as an output.

Robin_Shen — Wed, 02 May 2018 07:55:56 GMT

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

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Kinetis MicrocontrollersのトピックRe: KV46 GPIO PORTC4 setup as an output.

KV46 GPIO PORTC4 setup as an output.

Re: KV46 GPIO PORTC4 setup as an output.