Intrinsyc LANTRONIX Open-Q 820 User Manual page 37

Description
GND
Clock for digital MIC 1
and 2
Digital MIC 1 and 2
data line
1.8V power supply
max 300mA
GND
3.9.12 Audio Outputs Expansion Header J26
This header expansion provides the following audio outputs:
1. 2 differential analog audio line out
2. 2 single ended analog audio line out
3. 1 differential analog earpiece amplifier output (no external amp needed)
4. 2 speaker amplifier enable control
5. Voltage rails to support analog and digital mics
The table below outlines the pin out information of the audio outputs expansion header J26:
Open-Q™ 820 / 820Pro µSOM Dev Kit User Guide
Signal Pin NO
GND J50[11]
CDC_DMIC_CL J50[13]
K0
CDC_DMIC_DA J50[15]
TA0
VREG_S4A_1P J50[17]
8
GND J50[19]
Figure 15 J26 Audio Outputs Expansion Header
Open-Q 820 µSOM Development Kit
Description
GND GND
Clock for digital MIC CDC_DMIC_CLK1
3 and 4
Digital MIC 3 and 4 CDC_DMIC_DAT
data line A1
Clock for digital MIC CDC_DMIC_CLK2
5 and 6
Digital MIC 5 and 6 CDC_DMIC_DAT
data line A2
Signal Pin NO
J50[12]
J50[14]
J50[16]
J50[18]
J50[20]
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