STEVAL-MKI117V1 STMICROELECTRONICS [STMicroelectronics], STEVAL-MKI117V1 Datasheet

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STEVAL-MKI117V1

Manufacturer Part Number
STEVAL-MKI117V1
Description
MEMS microphone demonstration board based on the MP34DT01 and STM32
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet

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STEVAL-MKI117V1
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Features
Description
The purpose of the STEVAL-MKI117V1
demonstration board is to provide an example of
the decoding and streaming of digital MEMS
microphone outputs.
The STEVAL-MKI117V1 demonstration board
hosts the MP34DT01 (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-MKI117V1 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
For further information contact your local STMicroelectronics sales office.
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
MEMS microphone demonstration board
Doc ID 023000 Rev 1
based on the MP34DT01 and STM32
STEVAL-MKI117V1
Data brief
www.st.com
1/5
5

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STEVAL-MKI117V1 Summary of contents

Page 1

... The STM32 microcontroller decodes the PDM signal coming from the microphones and streams the audio via the USB. The STEVAL-MKI117V1 demonstration board is a sound card automatically recognized by the audio device. Connection is made through a USB cable which also supplies the board and then streams the collected audio ...

Page 2

... Schematics 1 Schematics Figure 1. Schematic diagram ( 2/5 Doc ID 023000 Rev 1 STEVAL-MKI117V1 ...

Page 3

... STEVAL-MKI117V1 Figure 2. Schematic diagram ( Doc ID 023000 Rev 1 Schematics 3/5 ...

Page 4

... Revision history 2 Revision history Table 1. Document revision history Date 27-Mar-2012 4/5 Revision 1 Initial release. Doc ID 023000 Rev 1 STEVAL-MKI117V1 Changes ...

Page 5

... STEVAL-MKI117V1 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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