The following table lists all available MCA IOs and their functionalities:

MCA IO MCA pad SMARC pad Functionality Usage on the DVK

IO0

PA3

P108

SMARC_GPIO0/CAM0_PWR#

MIPI camera power

IO1

PA2

P109

SMARC_GPIO1/CAM1_PWR#

BOOT LED

IO2

PB13

P110

SMARC_GPIO2/CAM0_RST#

User button (UBUTTON)

IO3

PB12

P111

SMARC_GPIO3/CAM1_RST#

User LED (ULED)

IO4

PB11

P112

SMARC_GPIO4/HDA_RST#

LVDS1 IRQ

IO5

PA15

P119

SMARC_GPIO11

unused

IO6

PF1

S142

SMARC_GPIO12

M.2 E-Key WL_WAKE_IN

IO7

PF3

S123

SMARC_GPIO13

M.2 E-Key BT_WAKE_IN

IO8

PA5

S152

SMARC_CHARGER_PRSNT#

unused

IO9

PC13

S148

SMARC_LID#

unused

IO10

PB1

S76

SMARC_PCIE_B_RST#

PCIE2_RST#

IO11

PA1

P126

SMARC_RESET_OUT#

Reset of LT8912 bridge, M.2 B-Key, AQR113C

IO12

PA4

S151

SMARC_CHARGING#

unused

IO13

PA9

S156

SMARC_BATLOW#

unused

IO14

PA10

S157

SMARC_TEST#

unused

IO15

PA11

P117

SMARC_GPIO9

USB Type-C ALERT#

IO16

PA12

S58

SMARC_ESPI_RESET#

XSPI1_RESET#

SWDIO/IO17

PA13

S77

SWDIO/SMARC_PCIE_C_RST#

unused

SWCLK/IO18

PA14

P115

SWCLK/SMARC_GPIO7

RS485_DE/RE#

IO19

PB2

S107

SMARC_LCD1_BKLT_EN

unused

IO20

PB3

S116

SMARC_LCD1_VDD_EN

unused

IO21

PB4

S127

SMARC_LCD0_BKLT_EN

unused

IO22

PB5

S133

SMARC_LCD0_VDD_EN

unused

IO23

PB8

S146

SMARC_PCIE_WAKE

PCIE1 and PCIE2 WAKE#

IO24

PB9

P33

SMARC_SDIO_WP#

unused

IO25

PB10

P75

SMARC_PCIE_A_RST#

PCIE1_RST#

IO26

PC1

-

ENET_INT_N

Reserved - internal to SMARC SOM

IO27

PC3

-

EXT_RTC_INT_N

Reserved - internal to SMARC SOM

IO28

PC4

-

TEMP_ALERT

Reserved - internal to SMARC SOM