[S32K144] New/ Empty Chip Resets Automatically in a Certain Period

[HMSwitches]

Hey,

Wish you a happy new year!

I'm working on a project using S32K144 and saw that there were period reset signals on the MCU reset PIN on a brand new PCBA.

I thought something goes wrong with my external reset circuit. But after I disconnect all of my external reset circuit including the capacitor, the period reset signal comes from the MCU itself.

I googled some and some people are mentioning same phenomenon.

It's not a problem to me but trying to convince other guys.

So, can you help to point out if it's correct behavior? And do you have a document like mentioning this behavior?

Thanks,

[danielmartynek · Accepted solution]

Hello @HMSwitches,

This is taken from AN12130 Production Flash Programming Best Practices for S32K1xx MCUs, Chapter 5 Common problems.

https://www.nxp.com/docs/en/application-note/AN12130.pdf

Regards,

Daniel

[HMSwitches]

Thank you Daniel, that's helpful.