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STMicroelectronics X-NUCLEO-CCA02M2 Expansion Board is a digital MEMS microphone expansion board that is based on the MP3DT06J microphone. This expansion board comes with 6 slots to plug in the digital microphone coupon boards such as the STEVAL-MIC001V1, STEVAL-MIC002V1, and STEVAL-MIC003V1. The X-NUCLEO-CCA02M2 expansion board features synchronized acquisition and streaming of up to 4 microphones. This expansion board incorporates free comprehensive development firmware library and audio capture plus USB streaming sample application that are compatible with the STM32Cube. The X-NUCLEO-CCA02M2 board is equipped with ST morpho connector and Arduino UNO R3 connector.