Question from Predictive Maintenance Webinar 29th of April: Digital vs. Analog Microphone: what resources of STM32 do each require?

[Pasi MYLLYMAKI]

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[Vladimir JANOUSEK_34072]

Analog the ADC converter and of course an ST OpAmp as example - TS922EIJT. The digital MEMS MIC is using PDM signal which can be handled by SPI/I2S bus or through Digital filter for sigma delta modulators (DFSDM) available at some STM32 MCUs, such as STM32L4 series, as example. Please check STWIN schematic as reference

https://www.st.com/resource/en/schematic_pack/steval-stwinkt1_schematic.pdf

For SW side, please check details about X-CUBE-MEMSMIC1 SW package