STEVAL-MKI117V2 STMICROELECTRONICS [STMicroelectronics], STEVAL-MKI117V2 Datasheet

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STEVAL-MKI117V2

Manufacturer Part Number
STEVAL-MKI117V2
Description
MEMS microphone demonstration board based on the MP45DT02 and STM32
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet

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STEVAL-MKI117V2
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Features
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
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 023001 Rev 1
based on the MP45DT02 and STM32
STEVAL-MKI117V2
Data brief
www.st.com
1/5
5

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STEVAL-MKI117V2 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-MKI117V2 demonstration board is a sound card automatically recognized by the audio device. The 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 023001 Rev 1 STEVAL-MKI117V2 ...

Page 3

... STEVAL-MKI117V2 Figure 2. Schematic diagram ( Doc ID 023001 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 023001 Rev 1 STEVAL-MKI117V2 Changes ...

Page 5

... STEVAL-MKI117V2 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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