Can; Usb Host; Usb Otg; Mini Pcie - Digi ConnectCore 8M Mini Hardware Reference Manual

Interfaces
Pin Signal name
1 3V3_SOM_EXT 3.3 V power supply
2 RS485_B
3 RS485_A
4 GND
UART3 is used for this purpose, together with the LTC2862 transceiver. You can connect a 120Ω
terminator resistor to the bus by closing J25.
Note UART3 is also connected to expansion header J45. To use these lines on this connector, remove
resistors R291, R359, and R292 to avoid collision with the RS485 transceiver.

CAN

One CAN FD bus is available on the development board through connector J24:
Pin Signal name Description
1 5V
2 CAN1_H
3 CAN1_L
4 GND
The i.MX 8M Mini CPU does not support any CAN interface, so the SPI3 bus of the CPU in combination
with the MCP2517FD controller and the TCAN1042 transceiver are used for this purpose.
A 120Ω terminator resistor can be connected to the bus by closing J23.

USB Host

Up to four USB Host interfaces are supported by the development board through the USB2514B USB
hub:
Two of the ports are available over a stackable dual USB A-type connector.
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One port is connected to the Mini PCI Express slot.
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One port is connected to the XBee Cellular socket.
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USB OTG

A micro-AB type receptacle for USB OTG connection is available on the CC8M Mini development board.
This interface can operate in both Host and Device mode.

Mini PCIe

The development board provides one Mini PCI Express socket (J19) supporting USB, PCIe and I2C
connection to the ConnectCore 8M Mini module. A micro SIM socket is also connected to the Mini PCI
Express slot.
ConnectCore 8M Mini Development Board Reference Manual
Description
RS485 B line
RS485 A line
Ground
5 V power suppy
CAN high line
CAN low line
Ground
Communication
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