Digi ConnectCore 8X Hardware Reference Manual page 20

Pin Schematic signal name
26 GPIO4_20
27 I2C3_SDA
28 I2C3_SCL
29 GPIO4_21
30 GND
31 GPIO4_22
32 GPIO5_03
33 MCA_IO5
34 GND
35 MCA_IO7
36 MCA_IO8
37 MCA_IO3
38 MCA_IO4
39 GND
40 GPIO1_19
Note The UART bus connected to the expansion header of the ConnectCore 8X SBC Express board can be one of the following:
i.MX 8X UART3.
n
XBee UART, which is connected to the i.MX 8X UART0 bus.
n
The lines of these two communication buses are connected through 0-ohm resistors. By default, UART3 is connected (R64 and R65 populated) and UART0
is not connected (R66 and R67 not populated).
Description
i.MX 8X GPIO
i.MX 8X I2C3 bus data line
i.MX 8X I2C3 bus clock line
i.MX 8X GPIO
i.MX 8X GPIO
i.MX 8X GPIO
MCA GPIO
MCA GPIO
MCA GPIO
MCA GPIO
MCA GPIO
i.MX 8X GPIO