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March 2012

Doc ID 022999 Rev 1

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STEVAL-MKI116V1

MEMS microphone demonstration board based on the

MP34DB01 and STM32

Data brief

Features

PC as an audio device

devices

data stream (1 to 3.25 MHz) of 1-bit digital

samples (PDM technique)

the PC through the USB

Description

The purpose of the STEVAL-MKI116V1

demonstration board is to provide an example of

the decoding and streaming of digital MEMS

microphone outputs.

The STEVAL-MKI116V1 demonstration board

hosts the MP34DB01 (bottom-port digital

microphone), working as a sensor, and the

STM32F107RC microcontroller, working as an

audio decoder.

These microphones are analog-to-digital

transducers. They are able to sense sound

pressure and convert this signal into a digital

signal using the PDM technique.

The STM32 microcontroller decodes the PDM

signal coming from the microphones and streams

the audio via the USB.

The STEVAL-MKI116V1 demonstration board is a

sound card automatically recognized by the PC

as an audio device. Connection is made through a

USB cable which also supplies the board and

then streams the collected audio.

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