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Microphone Input

The MCBSTM32F200 board includes a standard stereo microphone mini-connector for input to the on-board Cirrus CS42L52 CODEC. Installing jumpers J9 and J8 applies a bias voltage separately to the left and right microphone inputs (AIN3A and AIN3B). The bias voltage (MICBIAS) value is a software configurable parameter within the CODEC.

On-board Microphone

The MCBSTM32F200 board also contains a MEMS digital microphone (MIC1) for for capturing monaural audio. The jumpers J5 and J7 enable the microphone by connecting its M_DATA and M_CLK signals to ports PC3 and PI1 on the MCU.

MCBSTM32F200 Board - Microphone

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