DFSDM Output resolution

[GWenJ.1]

When I use DFSDM, I configure FOSR= 256 ISOR=1 and the output is outside the range in the reference guide +-16777216

[Imen.D]

Hello @GWenJ.1​ and welcome to the Community 🙂

Please specify which device used?

You can check the STM32Cube package which providing DFSDM example that can help you on the DFSDM usage and configuration.

Imen

[GWenJ.1]

STM32H723

The STM32Cube H7 package which providing DFSDM example，Only refer a applicableation About Audio

Can you verify the range of DFSDM output results at FORD=3 FOSR=256 ISOR=1 ？

[GWenJ.1]

A

[GWenJ.1 · Accepted solution]

Get the answer

 /* Regular conversion value is a signed value located on 24 MSB of register */

 /* So after applying a mask on these bits we have to perform a division by 256 (2 raised to the power of 😎 */