Storage Interfaces; Microsd; Expansion And User Interfaces; Expansion Connector - Digi ConnectCore 8X SBC Pro Hardware Reference Manual

Interfaces

Storage interfaces

MicroSD

A microSD socket (J10) is located on the bottom side of the board. This interface is connected to the
USDHC1 controller of the i.MX 8X CPU.

Expansion and user interfaces

Expansion connector

Two 2-row, 40-pin, 2.54 mm pitch headers (J20 and J27) are supported by the ConnectCore 8X SBC
Pro board. This headers acts as an expansion connector, offering access to many different interfaces
of the CPU and the MCA.
The following table show the pinout of the expansion connectors:
Description
1.8V power supply line.
MCA GPIO.
MCA GPIO. Line not
available for general
purpose usage.
MCA GPIO. Line not
available for general
purpose usage.
MCA voltage reference
output.
i.MX 8X GPIO.
MCA GPIO.
Connected to on-module
wireless MAC.
ConnectCore® 8X SBC Pro Hardware Reference Manual
Signal name Pin
J20
GND 2 1
1V8_EXT 4 3
MCA_IO7 6 5
MCA_IO9 8 7
MCA_IO5 10 9
MCA_VREF_ 12 11
OUT
GPIO4_21 14 13
MCA_IO17 16 15
BT_WAKEUP_ 18 17
SLAVE
Storage interfaces
Signal name Description
VCC_MCA MCA power supply line.
MCA_ MCA 32 kHz clock
CLKOUT32K output.
MCA_IO6 MCA GPIO. Line not
available for general
purpose usage.
MCA_IO8 MCA GPIO.
GND
MCA_IO14 MCA GPIO.
GPIO4_20 i.MX 8X GPIO.
3V3_RF 3.3V power supply rail of
the RF section of the
SOM.
BT_WAKEUP_ Connected to on-module
HOST wireless MAC and to
MCA_IO12.
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