STEVAL-MKI116V1

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 ) s t( c u d e t le o r P o s b O ) Description s ( t c The purpose of the STEVAL-MKI116V1 demonstration board is to provide an example of the decoding and streaming of digital MEMS microphone outputs. u d o r P e 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. t e l o s b O 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. 1/5 www.st.com 5 s b O Doc ID 022999 Rev 1 0LQL7\SH% & Q) ,2  86%/&  ,2 ,2  9%86  8  *1'  ,2 4   5  5 N 5        ( 5 . 86%'3 86%'0   5  ' /(' & Q) 9&&B86%    ' /(' 5  %($'  / ,1'8&725 o r P '  ,'  *1'  ( & 5 51&    & Q)   5 -3 -3 &        287 287 Q)   ) s t( . . 5     -706 &   /0/0 $'- 287 287 ,1 8  5 . 287 /'6;; 9,1+ 9,1 8  c u d X)   670B,6B%,&. 5 . 670B,6B/5&. 5 .  9%86  '  %      -  4 e t le . 5 % & 5 . 8&B9'' *1' 9&&B86%   5 N -567 1567 -7&. -7$* %