STM32F469I-DISCO DFSDM Peripheral for MEMS microphone.

[AlecCT]

I'm using an STM32F469I-DISCO ($AU1) board that I've used for a few little projects and have come to try to prototype something using it's MEMS digital microphones (MP34DT01-M).

In the documentation for the discovery board it lists the connections of these microphones to the DFSDM peripheral pins of the MCU, however looking in the datasheet of the F469 it doesn't list the DFSDM peripheral anywhere and on pages that discuss the DFSDM peripheral the F469 is not listed as an MCU with DFSDM compatibility. Furthermore, on the CubeMX example project for the F469I-DISCO the pins connected to the MEMS microphones are configured with the SAI peripheral.

Is this a documentation issue for the discovery board or are there extra steps I need to take to use the DFSDM peripheral?

Thanks for any help anyone can provide.

[pedro68]

Thanks for posting this! I've been trying to use the DFSDM peripheral with the MEMS microphones on the STM32F469I-DISCO, and this clarifies a lot. I didn't know that you could switch between the different microphones by just altering the solder bridges, definitely going to give this a try.:smiling_face_with_smiling_eyes: