Datasheet

11.11. Digital Microphone Interface
AC101 supports a stereo digital microphone interface. The DMICCLK/ DMICDAT pins are multiplexed on
the MIC3P/MIC3N pins. The circuit share decimation filter with audio ADC. And DMICCLK can be
output 128fs (fs= ADC sample rate).
Digital Microphone power usually falls between the range 1.6V-3.6V, typical 1.8V. And the Clock
frequency is between the the range 1.0MHz-3.25MHz, typical 2.4MHz.
Digital Microphone Block Diagram as below:
Figure 28 Digital Microphone Block Diagram
Digital Microphone timing as below:
Figure 29 Digital Microphone timing
Digital Microphone application as below:
Figure 30 Digital Microphone Application