PDM microphone (02730A0019 or AKU242) electrical connection to nRF52832


I am connecting the AKU242 straight to our microprocessor. It is a PDM interface so it has a SELECT, DATA, CLOCK, VDD and 5 GND signals. On the datasheet, there are two identical PDM microphones with one SELECT connected to GND and another SELECT connected to VDD.

  1. However, we have only ONE PDM microphone on our system. Any recommendation on how to connect the SELECT of the microphone?


  1. Do we need any resistors (~50 Ohms) on the DATA/CLK lines on microphone to PDM-DATA/PDM-CLK on nordic?