S32K中的主题 Re: S32K344 - ADC pre-sampling / presampling time

S32K344 - ADC pre-sampling / presampling time

kyf — Thu, 30 Mar 2023 15:06:00 GMT

Hello NXP team!

Please can someone let me know where I can find more information regarding ADC presampling time and it's configurations ?

I've seen that PST is used in the ADC Total_conversion_time calculation but I can not find any register or details about it's configuration.

The only configuration that I've found regarding PST is inside ADC_Sar_Ip and it is only a check box.

I've set the sampling time here:

But I can not where I can configure the pre-sampling time.

The files that I've searched is the RM of S32K344 and the ADC guide AN13413. Is there anything else that I've probably missed ?!

Kind regards,

kyf

Re: S32K344 - ADC pre-sampling / presampling time

_Leo_ — Mon, 03 Apr 2023 23:26:47 GMT

Hi,

Thank you so much for your interest in our products and for using our community.

The corresponding configuration fields are described in the reference manual, 59.3.9 Presampling section. Later, in the 59.3.18 Conversion time section, it states that the presampling time is sample time plus one cycle of AD_clk.

Hope it helps you.

Have a nice day!

Re: S32K344 - ADC pre-sampling / presampling time

kyf — Tue, 04 Apr 2023 06:43:24 GMT

Good morning @_Leo_.

Thank you for reaching out and thank you for answering my question.