Техническая Спецификация для STMicroelectronics MEMS microphone demonstration board based on the MP34DT01 and STM32 STEVAL-MKI117V1 STEVAL-MKI117V1
Модели
STEVAL-MKI117V1
For further information contact your local STMicroelectronics sales office.
March 2012
Doc ID 023000 Rev 1
1/5
5
STEVAL-MKI117V1
MEMS microphone demonstration board
based on the MP34DT01 and STM32
Data brief
Features
■
Powered and connected to PC through USB
■
Sound card automatically recognized by the
PC as an audio device
PC as an audio device
■
The onboard microphones are digital MEMS
devices
devices
■
MEMS microphones provide a high frequency
data stream (1 to 3.25 MHz) of 1-bit digital
samples (PDM technique)
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
the PC through the USB
■
LED status indicator
■
RoHS compliant
Description
The purpose of the STEVAL-MKI117V1
demonstration board is to provide an example of
the decoding and streaming of digital MEMS
microphone outputs.
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.
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.
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.
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.
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.