Open-Q™ 845 µSOM Development Kit User Guide
Version 1.0
© Copyright Intrinsyc Technologies Corporation
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For more details regarding configuring the GPIOs on this header, refer to the Open-Q 845 Software
Release Notes to determine feature support in the latest software release.
3.7.18
Audio Inputs Expansion Header J1900 (27)
The Open-Q 845 µSOM Development Kit audio subsystem is built around the Qualcomm Audio
Codec WCD9340 (28). The Audio Inputs Expansion Header J1900 exposes some of the audio input
capabilities of WCD9340 for the user. See item 27 in Figure 1 for the carrier board location of this
header. The pinout for this header is shown in the table below.
Table 13. Audio Inputs Expansion Header Pinout J1900
Pin
No
Signal
Description
Pin
No
Signal
Description
1
CDC_IN1_P
Codec Input 1 Positive
2
CDC_IN1_N
Codec Input 1 Negative
3
CDC_IN3_P
Codec Input 3 Positive
4
CDC_IN3_N
Codec Input 3 Negative
5
CDC_MIC_BIAS1
Microphone Bias 1
6
CDC_MIC_BIAS3
Microphone Bias 3
7
CDC_IN4_P
Codec Input 4 Positive
8
CDC_IN4_N
Codec Input 4 Negative
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_CLK0
Digital Microphone 0 Clock
14
CDC_DMIC_CLK1
Digital Microphone 1 Clock
15
CDC_DMIC_DATA
0
Digital Microphone 0 Data
16
CDC_DMIC_DATA
1
Digital Microphone 1 Data
17
VREG_S4A_1P8
µSOM LDO Regulator S4A
+1.8V
18
CDC_DMIC_CLK2
Digital Microphone 2 Clock
19
GND
System Ground
20
CDC_DMIC_DATA
2
Digital Microphone 2 Data
3.7.19
Audio Outputs Expansion Header J1901 (26)
The Open-Q 845 µSOM Development Kit audio subsystem is built around the Qualcomm Audio
Codec WCD9340 (28). The Audio Outputs Expansion Header J1901 exposes some of the audio
output capabilities of WCD9340 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.
7
VREG_LVS2A_1P8
µSOM low voltage
switch LVS2 +1.8V
8
VREG_L19A_3P0
µSOM LDO L19A
+3.0V
9
GND
Ground
10
GND
Ground
11
GPIO122_HRM_INT
CPU GPIO122
12
GPIO125_TS_INT_N
CPU GPIO125
13
SSC6_QUP1_4_SPI1_CS1_N
CPU Sensor Core
SSC_GPIO6
14
GPIO120_ALSP_INT_N
CPU GPIO120
15
GPIO62_QUA_MI2S_DATA
2
CPU GPIO62
16
GPIO119_MAG_INT_N
CPU GPIO119
17
No Net
18
GPIO124
CPU GPIO124
19
SSC5_QUP1_3_SPI1_CS0_N
CPU Sensor Core
SSC_GPIO5
20
SSC3_QUP1_1_SPI1_MOSI
CPU Sensor Core
SSC_GPIO3
21
SSC4_QUP1_2_SPI1_CLK
CPU Sensor Core
SSC_GPIO4
22
SSC2_QUP1_0_SPI1_MISO
CPU Sensor Core
SSC_GPIO2
23
No Net
24
SSC7_QUP1_5_SPI1_CS2_
N
CPU Sensor Core
SSC_GPIO7
