STEVAL-MKI117V1

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 analogue 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.

• 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 (1MHz to 3.25MHz) of 1bit digital samples
• Audio collected from the microphones is sent to the PC through the USB
• LED status indicator

Applications

Audio, Consumer Electronics, Portable Devices, Imaging, Video & Vision, Security