User Guide

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● MIC_BIAS1, _BIAS3: Ground reference
9.2 Digital Microphones
The 24 pin audio expansion connector supports 2 additional analog microphone inputs:
●
DMIC_1
● DMIC_2
9.3 Line Out
The 24 pin audio expansion connector supports 4 line outputs:
Line_Out1, Line_Out2: Differential drivenLine_Out3, Line_out4: Single ended with CDC_Line_Ref to use as a reference
ground.
● Audio Amplifier interface. The 24 pin audio expansion connector supports the following interface and control of
audio amplifiers: Soundwire (CDC_SWR_CLK, SWR_DATA): Used and audio interface to Qualcomm WSA8810 or
8815 speaker amplifiers.
● Amplifier control via SPKR_AMP_EN1, _EN2