S32K144 IO output level changed issue

Ali22 — Mon, 12 May 2025 15:22:26 GMT

Dears

I encounter an issue like this: when I do S32K144 CAN BUS-OFF experiment, I put an IO toggle function in the CAN error interrupt to indicate CAN BUS-OFF happened, MCU VDD supply is 5V, but when I view the IO toggle output waveform I found sometimes the IO output level changed to about 3.5V, in the meanwhile VDD 5V is no change, so I get confused why the output changed to 3.5V in sometimes? I confirm there is no reset happened when 3.5V come out, and 3.5V pulse width is about 10ms, it doesn't seems like a noise, dose K144 entry to a special mode that may cause the output level changed?Anyone who meet this kind of issue, thanks.

Re: S32K144 IO output level changed issue

Senlent — Tue, 13 May 2025 01:46:16 GMT

Hi@Ali22

Please provide a simple project that can reproduce the problem, I will help you test and analyze it.

topic Re: S32K144 IO output level changed issue in S32K

S32K144 IO output level changed issue

Re: S32K144 IO output level changed issue