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Oct 11, 2025 12:01 PM UTC
Question

Driving a Sigma-Delta ADC with STM32H562RIT6

Hi

Please provide a sample code to interface a Sigma-Delta type ADC like the ADuM7701 with the STM32H562RIT6, which does not have a DFSDM unit, and guide me on optimizing the code so that the microcontroller is not solely occupied with processing the MDAT signal from the ADuM7701.

 
thank you
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1 reply

AScha.3
Super User
Oct 11, 2025 12:55 PM UTC

Hi,

so on cpu without DFSDM  , could try using the SAI : PDM mode

AScha3_0-1760187066076.png

But:

AScha3_1-1760187099954.png

So look on git, sure you can find some pdm->decimation filter , then write your program.

+

>provide a sample code to interface a Sigma-Delta type ADC 

>and guide me on optimizing the code 

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