MEMS microphone demonstration board based on the MP34DT01 and STM32

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.

Key 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

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Design

Technical Documentation

Product Specifications
Description Version Size
DB1600 DB1600: MEMS microphone demonstration board based on the MP34DT01 and STM32 1.1 357 KB
Application Notes
Description Version Size
AN4041 AN4041: APWlink+ microphone USB demonstration boards based on the MP34DT01, MP45DT02, or MP34DB01 2.1 1 MB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-MKI117V1 gerber files 1.0 249 KB
Bill of Materials
Description Version Size
STEVAL-MKI117V1 BOM 2.1 82 KB
Schematic Packs
Description Version Size
STEVAL-MKI117V1 schematics 1.0 68 KB

Legal

License Agreement
Description Version Size
Evaluation products license agreement 1.0 125 KB

Tools and Software

Development Tools
Software Development Tools
Support & Community

Sample & Buy

Part Number Marketing Status Unit Price (US$) * Quantity Core Product ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-MKI117V1 Active 71.05 1 MP34DT01; STM32 NEC 3A991A2 ITALY MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-MKI117V1 ActiveCARDIndustrialEcopack2
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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