Tiny digital mic - but how to communicate?

Erlend

I have pilfered bits from a trash portable pc. One thing I found was this - a digital stereo microphone. Has anyone a clue about how to connect and communicate with this one. I would save two analogue channels if I could find a way.

The pcb print reveals there are 4 connections:GND, CLK, VDD, DATA. That's all I know.

Erlend

Circuitsoft

Likely: http://www.st.com/web/en/resource/technical/document/datasheet/DM00025467.pdf

Ayberk

Can you tell how you solved it?

kwinn

It is a 6 year old post and the link does not work, but my guess (based on having a clk and data line) is that the chip is an adc or sound processor that outputs a string of bits for each of the two microphones. First thing to check is to see if the clk and data are active when power is applied.

Circuitsoft

Pulse Density Modulation. https://learn.adafruit.com/adafruit-pdm-microphone-breakout/pinouts