topic ADC presampling with bypass sampling enabled - Not working - EBTressos in S32K

ADC presampling with bypass sampling enabled - Not working - EBTressos

Venu_M — Fri, 15 Dec 2023 06:23:24 GMT

Hi,

I am trying to perform ADC conversion for precision input and standard input channels for S32K342 device with the following configurations.

OBSERVATION:

Observed PREVAL values in result register for the respective ADC channels.
- if PREVAL - 1, Result registers are HIGH
- if PREVAL - 0, Result register values are zeroes.

danielmartynek — Fri, 15 Dec 2023 15:05:03 GMT

This is a correct observation.

When PSCR[PRECONV] = 0, pre-samling is followed by sampling and conversion.

When PSCR[PRECONV] = 1, pre-samling is followed by conversion.

RM, Section 61.3.9 Presampling

BR, Daniel

Venu_M — Mon, 18 Dec 2023 06:05:30 GMT

Hi @danielmartynek ,

I am trying to get correct conversion data with PSCR[PRECONV] = 1. Not able to get the correct data.

Regards,
Venu

danielmartynek — Mon, 18 Dec 2023 11:14:12 GMT

These are the correct data.

When PRECONV = 1, the sampling on the actual input channels is skipped.

BR, Daniel