STEVAL-MKI138V3 Datasheet, PDF (1/4 Pages) STMicroelectronics – LED status indicator

STEVAL-MKI138V3
STAudioHub USB interface board based on MP45DT02 and STM32
Features
• Sound card automatically recognized by a PC
as an audio device.
• MEMS microphones provide a high frequency
data stream (1 to 3.25 MHz) of 1-bit digital
samples (PDM technique)
• Audio signals collected from the microphones
are sent to the PC by USB (powered and
connected to PC through USB)
• LED status indicator
• RoHS compliant
Data brief
Description
The purpose of the STEVAL-MKI138V3
STAudioHub evaluation board is to demonstrate
the decoding and streaming performance of
digital MEMS microphone outputs.
The STEVAL-MKI138V3 hosts the MP45DT02
top-port digital microphone, which works 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-MKI138V3 evaluation board is a
sound card which is automatically recognized by
a PC as an audio device. Connection is made
through a USB cable, which also supplies the
board, and then streams the audio collected from
the microphones to the PC.
It is also possible to use the board as an interface
for other microphone PCBs (STEVAL-MKI126Vx).
In this case is recommended the use of the
APWorkbench software tool.
June 2014
DocID026565 Rev 1
For further information contact your local STMicroelectronics sales office.
1/4
www.st.com