STEVAL-MKI117V2 Datasheet, PDF (1/5 Pages) STMicroelectronics – MEMS microphone demonstration board based on the MP45DT02 and STM32

STEVAL-MKI117V2
MEMS microphone demonstration board
based on the MP45DT02 and STM32
Data brief
Features
■ Powered and connected to PC through USB
■ Sound card automatically recognized by the
PC as an audio device
■ The onboard microphones are digital MEMS
devices
■ MEMS microphones provide a high frequency
data stream (1 to 3.25 MHz) of 1-bit digital
samples (PDM technique)
■ Audio collected from the microphones is sent to
the PC through the USB
■ LED status indicator
■ RoHS compliant
Description
The purpose of the STEVAL-MKI117V2
demonstration board is to provide an example of
the decoding and streaming of digital MEMS
microphone outputs.
The STEVAL-MKI117V2 demonstration board
hosts the MP45DT02 (top-port digital
microphone), working as a sensor, and the
STM32F107RC microcontroller, working as an
audio decoder.
These microphones are analog-to-digital
transducers, in other words, 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-MKI117V2 demonstration board is a
sound card automatically recognized by the PC
as an audio device. The connection is made
through a USB cable which also supplies the
board and then streams the collected audio.
March 2012
Doc ID 023001 Rev 1
For further information contact your local STMicroelectronics sales office.
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