ADC initialization for S32K311 microcontroller

truptikavadi1 — Tue, 12 Aug 2025 11:06:03 GMT

Hi,

Is there any delay time required for ADC initialization?

Because, on first ADC conversion, I am observing incorrect ADC values when I am giving a delay of less than 10ms where as when I am giving a delay of 10ms then the ADC values are correct.

I am facing this issue for Pin PTA10 and PTC5 for above mentioned microcontroller where these were JTAG pin which are configured as GPIO pins

Re: ADC initialization for S32K311 microcontroller

_Leo_ — Thu, 21 Aug 2025 23:27:41 GMT

Thank you for your interest in our products and for contributing to our community.

I must admit that I have not tried analog readings on JTAG pins, since we do not have them available in the headers of our EVBs.

Also consider that at least these pins are connected to pull-up resistors for JTAG configuration.

In addition to the RTD examples, I recommend checking out the following examples:

https://community.nxp.com/t5/S32M-Knowledge-Base/S32M27x-S32K3-eMIOS-BTCU-ADC-DMA-RTD600/ta-p/2155542

https://community.nxp.com/t5/S32K-Knowledge-Base/RTD400-LLD-K344-ADC-SW-HW-trigger/ta-p/1966179

I hope this information is helpful.

S32KのトピックRe: ADC initialization for S32K311 microcontroller

ADC initialization for S32K311 microcontroller

Re: ADC initialization for S32K311 microcontroller