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March 2012 Doc ID 022999 Rev 1 1/5

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.

www.st.com

Summary of content (5 pages)

PAGE 1
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.
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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.
PAGE 5
STEVAL-MKI116V1 Please Read Carefully: 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.