STEVAL-MKI117V2

STEVAL-MKI117V2 demonstration board is to provide an example of the decoding and streaming of digital MEMS microphone outputs. Board hosts the MP45DT02 (top port digital microphone), working as a sensor, and the STM32F107RC microcontroller, working as an audio decoder. These microphones are analogue to digital transducers, in other words, 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 demonstration board is a sound card automatically recognized by the PC as an audio device. The 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, Sensing & Instrumentation