REL0.1
Page 28 of 52
Snapdragon 820 SMARC SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
Pin
No.
SMARC Edge
Connector Pin Name
Signal Name
CPU Ball Name/
Pin Number
Signal Type/
Termination
Description
P114 GPIO6 / TACHIN
SMARC_GPIO_6
(GPIO_106)
GPIO_106/
B24
IO, 1.8V CMOS
SMARC General Purpose
Input/output 6
P115 GPIO7
SMARC_GPIO_7
(GPIO_107)
GPIO_107/
A25
IO, 1.8V CMOS
SMARC General Purpose
Input/output 7
P116 GPIO8
SMARC_GPIO_8
(GPIO_108)
GPIO_108/
C25
IO, 1.8V CMOS
SMARC General Purpose
Input/output 8
P117 GPIO9
SMARC_GPIO_9
(GPIO_109)
GPIO_109/
D24
IO, 1.8V CMOS
SMARC General Purpose
Input/output 9
P118 GPIO10
SMARC_GPIO_1
0(GPIO_110)
GPIO_110/
E23
IO, 1.8V CMOS
SMARC General Purpose
Input/output 10
P119 GPIO11
SMARC_GPIO_1
1(GPIO_111)
GPIO_111/
F26
IO, 1.8V CMOS
SMARC General Purpose
Input/output 11
P120 GND
GND
NA
Power
Ground.
P121 I2C_PM_CK
NC
NA
NA
NC
Note: optionally connected to
BLSP8_I2C_CLK
P122 I2C_PM_DAT
NC
NA
NA
NC
Note: optionally connected to
BLSP8_I2C_DAT
P123 BOOT_SEL0#
BOOT_SEL0#
NA
I, 1.8V CMOS
Boot Media Select bit 0
P124 BOOT_SEL1#
BOOT_SEL1#
NA
I, 1.8V CMOS
Boot Media Select bit 1
P125 BOOT_SEL2#
BOOT_SEL2#
NA
I, 1.8V CMOS
Boot Media Select bit 2
P126 RESET_OUT#
RESOUT_N
RESOUT_N /
B26
I, 1.8V CMOS
RESOUT from CPU to all
other peripherals
P127 RESET_IN#
RESIN_N_BTN
NA
I, 1.8V CMOS
Hard RESET Input to SOM
Note: Connected to PMIC
P128 POWER_BTN#
POWER_ON_BT
N
NA
I, 1.8V CMOS
Power ON /OFF Input to
SOM
Note: Connected to PMIC
P129 SER0_TX
BLSP9_UART_TX
(GPIO_49)
GPIO_49/
BE49
O, 1.8V CMOS BLSP9_UART Transmitter
P130 SER0_RX
BLSP9_UART_R
X(GPIO_50)
GPIO_50/
BE51
I, 1.8V CMOS
BLSP9_UART Receiver
P131 SER0_RTS#
BLSP9_UART_RF
R_N(GPIO_52)
GPIO_52/
BD50
O, 1.8V CMOS
BLSP9_UART
Request to
Send
P132 SER0_CTS#
BLSP9_UART_CT
S_N(GPIO_51)
GPIO_51/
BD52
I, 1.8V CMOS
BLSP9_UART
Clear to Send
P133 GND
GND
NA
Power
Ground.
P134 SER1_TX
BLSP10_UART_T
X(GPIO_8)
GPIO_8/
BF50
O, 1.8V CMOS BLSP10_UART Transmitter
P135 SER1_RX
BLSP10_UART_R
X(GPIO_9)
GPIO_9/
BG51
I, 1.8V CMOS
BLSP10_UART Receiver