topic Incorrectly configuring PTA0 bricked unit in Kinetis Microcontrollers

Incorrectly configuring PTA0 bricked unit

ignisuti_ — Fri, 22 Sep 2017 17:55:32 GMT

MCU: KW41z

During development, I've managed to incorrectly/accidentally configure PTA0 with zero values. This appears to have bricked my unit in such a way that I can no longer download code. Note: The code that is currently on there appears to continue to run.

It appears that PTA0 is used by the SWD and my incorrect configuration has this being configured as a Touch Select Input (TSI).

I have not been able to hold the MCU in reset and recover. What other methods should I try to once again debug the unit?

Re: Incorrectly configuring PTA0 bricked unit

Robin_Shen — Mon, 25 Sep 2017 03:25:46 GMT

Hi Joseph,

Please refer the method described in 'Bricking and Recovering FRDM-KL25Z Boards: Reset, SWD Clock and Low Power'.

I have attached the 'P&E Recovery Utility' that you may need to download.

Best Regards,

Robin

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Re: Incorrectly configuring PTA0 bricked unit

ignisuti_ — Mon, 25 Sep 2017 15:51:47 GMT

That un-bricked the boards. Thanks!