3.5 Microphone Inputs

The BM83 module supports up to two analog microphone channels and one stereo digital microphone. The digital microphone interface should only be used for Pulse Density Modulation (PDM) digital microphones (typically, MEMS microphones) up to about 4 MHz of clock frequency.

Note: An I²S based digital microphone should use the external I²S port.

Note: To avoid saturation in the PDM digital microphone path, Microchip recommends limiting the PDM maximum input level to -6 dBFS.