User Guide

31
9 24 pin Audio Expansion
Unless otherwise noted, these signals interface to the WCD9335 codec (U3).
PIN
Function
Connect to
Note
1
CDC_IN5_M
2
CDC_IN6_M
3
CDC_IN5_P
4
CDC_IN6_P
5
MIC_BIAS3
6
MIC_BIAS1
7
GND
8
SPKR_AMP_EN1
PMI8996 (U1)
9
CDC_SWR_CLK
10
CDC_SWR_DATA
11
SPKR_AMP_EN2
PMI8996 (U1)
12
GND
13
CDC_DMIC_CLK1
14
CDC_DMIC_CLK2
15
CDC_DMIC_DATA1
16
CDC_DMIC_DATA2
17
CDC_LINE_OUT2_M
18
CDC_LINE_OUT2_P
19
CDC_LINE_OUT1_M
20
CDC_LINE_OUT1_P
21
CDC_LINE_REF
22
VREG_3P3
3.3V from U20 buck switcher
23
CDC_LINE_OUT4
24
CDC_LINE_OUT3
9.1 Analog Microphones
The 24 pin audio expansion connector supports 2 additional analog microphone inputs:
●
MIC5
● MIC6