REL0.1
Page 38 of 52
Snapdragon 820 SMARC SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
Table 5: Expansion Connector Pin Assignment
Pin
No
Signal Name
CPU Ball Name/
Pin Number
Signal Type/
Termination
Description
1
VOLUME_P_BTN
NA
IO, 1.8V CMOS
GPIO from PMIC
2
VBUS_IN
NA
I, 5V Power
VBUS Power
3
HDMI_EN
NA
IO, 1.8V CMOS
GPIO from PMIC
4
VBUS_IN
NA
I, 5V Power
VBUS Power
5
GND
NA
Power
Ground.
6
GND
NA
Power
Ground.
7
LINE_OUT2_P
NA
NA
NC.
Note: On SOM Audio Codec is not
supported by default
8
USB3_HUB3_TXP
NA
I, DIFF
USB3.0 Port3 Transmit Positive
Note: Connected to USB Hub
9
LINE_OUT2_M
NA
NA
NC.
Note: On SOM Audio Codec is not
supported by default
10
USB3_HUB3_TXM
NA
I, DIFF
USB3.0 Port3 Transmit Negative
Note: Connected to USB Hub
11
GND
NA
Power
Ground.
12
GND
NA
Power
Ground.
13
LINE_OUT4
NA
NA
NC.
Note: On SOM Audio Codec is not
supported by default
14
USB3_HUB3_RXP
NA
I, DIFF
USB3.0 Port3 Receive Positive
Note: Connected to USB Hub
15
LINE_OUT3
NA
NA
NC.
Note: On SOM Audio Codec is not
supported by default
16
USB3_HUB3_RXM
NA
I, DIFF
USB3.0 Port3 Receive Negative
Note: Connected to USB Hub
17
EXP_HPH_REF
NA
NA
NC.
Note: On SOM Audio Codec is not
supported by default
18
GND
NA
Power
Ground.
19
EXP_HPH_R
NA
NA
NC.
Note: On SOM Audio Codec is not
supported by default
20
USB3_HUB4_TXP
NA
I, DIFF
USB3.0 Port3 Transmit Positive
Note: Connected to USB Hub