S32K144 VREFH what are the effects of different options?

[jingfang]

VREFH has the following three options,what's the difference between these three terms?

Whether the function safety level B ia affected?

[danielmartynek]

Hi @jingfang,

These are just a few options that the EVB allows.

1. VDD_MCU is connected to VDDA. Therefore, VREF = VDDA.

2. If VDD_MCU is 5V, VREFH can be 3V.

3. You can use whatever voltage reference connected to AREF.

This specification must be met:

Regarding function safety, please refer to the S32K1xx Safety Reference Manual that is available in SafeAssure NDA community group:

https://community.nxp.com/groups/safeassure-nda

I you don't have access, please follow this document:

https://community.nxp.com/docs/DOC-335524

Regards,

Daniel

[jingfang]

Thanks a lot~

I have S32K1xx Series Safety Manual , is it ok?