12048321 Rev. 01 (Draft)
23
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Pin
Signal / Function
Pin Type
Signal Description
Device/Connection
P119 GPIO11
IO (CMOS1.8V) General purpose IO
Board Controller
STM32
P120 GND
GND
Connected to ground potential of the PCB
GND
P121 I2C_PM_CK
IO (CMOS
1.8V/3.3V)
Power management I2C bus Clock
See I2C topology
P122 I2C_PM_DAT
IO (CMOS
1.8V/3.3V)
Power management I2C bus Data
See I2C topology
P123 BOOT_SEL0#
O (OD1.8V)
Input straps determine the module boot device.
J44
P124 BOOT_SEL1#
P125 BOOT_SEL2#
P126 RESET_OUT#
I (CMOS 1.8V) General purpose reset output to Carrier Board.
CB_RESET#
P127 RESET_IN#
O OD (CMOS
1.8V)
Reset output to SMARC module.
Board Controller
STM32
P128 POWER_BTN#
O OD (CMOS
1.8V to5V)
Power-Button output to SMARC module.
Board Controller
STM32
P129 SER0_TX
I (CMOS 1.8V) Asynchronous serial data output port 0
J47 (UART CMOS)
P130 SER0_RX
O (CMOS 1.8V) Asynchronous serial data input port 0
J47 (UART CMOS)
P131 SER0_RTS#
I (CMOS 1.8V) Request to send handshake line for port 0
J47 (UART CMOS)
P132 SER0_CTS#
O (CMOS 1.8V) Clear to send handshake line for port 0
J47 (UART CMOS)
P133 GND
GND
Connected to ground potential of the PCB
GND
P134 SER1_TX
I (CMOS 1.8V) Asynchronous serial data output port 1
J48 (UART CMOS)
P135 SER1_RX
O (CMOS 1.8V) Asynchronous serial data input port 1
J48 (UART CMOS)
P136 SER2_TX
I (CMOS 1.8V) Asynchronous serial data output port 2
J50 (RS485)
P137 SER2_RX
O (CMOS 1.8V) Asynchronous serial data input port 2
J50 (RS485)
P138 SER2_RTS#
I (CMOS 1.8V) Request to send handshake for SER port 2
RS485 direction
control
P139
SER2_CTS#
O (CMOS 1.8V) Clear to send handshake line for port 2
Not connected on
CB
P140 SER3_TX
I (CMOS 1.8V) Asynchronous serial data output port 3
J49 (RS232)
P141 SER3_RX
O (CMOS 1.8V) Asynchronous serial data input port 3
J49 (RS232)
P142 GND
GND
Connected to ground potential of the PCB
GND
P143 CAN0_TX
I (CMOS 1.8V) CAN Port 0 transmit output
J41 (over
MCP5262)
P144 CAN0_RX
O (CMOS 1.8V) CAN Port 0 recive input
J41 (over
MCP5262)
P145
CAN1_TX
I (CMOS 1.8V) CAN Port 1 transmit output
not connected on
CB
P146
CAN1_RX
O (CMOS 1.8V) CAN Port 1 recive input
not connected on
CB
P147 VDD_IN
Power
5V (+/-5%)
Main power supply to SMARC module
maximum current 3A.
V_5V0_REG
P148 VDD_IN
P149 VDD_IN
P150 VDD_IN
P151 VDD_IN
P152 VDD_IN
P153 VDD_IN
P154 VDD_IN
P155 VDD_IN
P156 VDD_IN