STEVAL-MKI116V1
MEMS microphone demonstration board based on the
MP34DB01 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-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.
March 2012
Doc ID 022999 Rev 1
For further information contact your local STMicroelectronics sales office.
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Schematics
STEVAL-MKI116V1
Schematics
Schematic diagram (1 of 2)
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STEVAL-MKI116V1
Schematics
Schematic diagram (2 of 2)
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Revision history
2
STEVAL-MKI116V1
Revision history
Table 1.
4/5
Document revision history
Date
Revision
27-Mar-2012
1
Changes
Initial release.
Doc ID 022999 Rev 1
STEVAL-MKI116V1
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