Lantronix Intrinsyc Open-Q 865XR SOM, User Manual, Page: 35 / 38

3: Open-Q 865XR SOM Development Kit
Open-Q 865XR SOM Development Kit User Guide 35
Pin
No
Signal Description
Pin
No
Signal Description
9 CDC_MIC_BIAS4 Microphone Bias 4 10 MB_VREG_3P3
Carrier board switching
reg3.3V
11 GND System Ground 12 GND System Ground
13 CDC_DMIC_CLK3 Digital Microphone 3
Clock
14 CDC_DMIC_CLK4 Digital Microphone 4
Clock
15
CDC_DMIC_DATA
3
Digital Microphone 3
Data
16
CDC_DMIC_DATA
4
Digital Microphone 4
Data
17 VREG_S4A_1P8
SOM LDO Regulator S4A
+1.8V
18 CDC_DMIC_CLK5 Digital Microphone 5
Clock
19 GND System Ground 20
CDC_DMIC_DATA
5
Digital Microphone 5
Data
3.7.20 Audio Outputs Expansion Header J1801 (26)
The Open-Q 865XR SOM Development Kit audio subsystem is built around the Qualcomm Audio Codec
WCD9385 (28). The Audio Outputs Expansion Header J1801 exposes some of the audio output
capabilities of WCD9385 for the user. See item 26 in Figure 1 for the carrier board location of this header.
The pinout for this header is shown in the table below.
Table 16. Audio Outputs Expansion Header Pinout J1801
Pin
No
Signal Description
Pin
No
Signal Description
1 CDC_LINE_OUT1_P Codec Line Out 1
Positive
2 CDC_LINE_OUT1_N
Codec Line Out 1
Negative
3 No Net No Net 4 No Net No Net
5 CDC_LINE_REF
Codec Reference
(GND)
6 MB_VREG_3P3
Carrier board switching
reg3.3V
7 No Net No Net 8 No Net No Net
9 CDC_EAR_P
Earphone Amplifier
Output Positive
10 CDC_EAR_N
Earphone Amplifier
Output Negative
11 GND System Ground 12 SOM_SYS_PWR_PER SOM System Power
13 CDC_SWR_CLK Codec PDM Clock 14 CDC_SWR_DATA Codec PDM Data
15 CDC_WSA_EN SOM PMIC GPIO127,
can be used as
16 CDC_WSA_EN2 SOM PMIC GPIO128,
can be used as