ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/Ethernet

History
Issue Date	Notes
2021/12/10	First release
2026/03/26	Add some info on eth Linux interfaces

Ethernet interfaces

The Evaluation Kit features two Gigabit Ethernet interfaces:

• ETH0 on J10 (on schematics)
  • this interface also features the TSN functionality
• ETH1 on J38 (on schematics)

Description

The Ethernet interfaces are available on the Evaluation Kit at the connectors J10 and J38.

J10 and J38 are RJ45 shielded connectors with dual leds. J10 is connected to the SoM's ethernet PHY, J38 is connected to the carrier's ethernet PHY

ETH0 - J10 connector

ETH1 - J38 connector

Signals

The following table describes the interfaces signals:

• J10

Pin#	Pin name	Pin Notes
1	ETH0_TXRX1_P
2	ETH0_TXRX1_N
3	ETH0_TXRX2_P
4	ETH0_TXRX3_P
5	ETH0_TXRX3_N
6	ETH0_TXRX2_N
7	ETH0_TXRX4_P
8	ETH0_TXRX4_N
9	ETH0_LED_ACT	ETH0 has active low signals
11	ETH0_LED_LINK	ETH0 has active low signals

• J38

Pin#	Pin name	Pin Notes
1	ETH1_TXRX1_P
2	ETH1_TXRX1_N
3	ETH1_TXRX2_P
4	ETH1_TXRX3_P
5	ETH1_TXRX3_N
6	ETH1_TXRX2_N
7	ETH1_TXRX4_P
8	ETH1_TXRX4_N
10	ETH1_LED_ACT	ETH1 has active high signals
12	ETH1_LED_LINK	ETH1 has active high signals

Device mapping

The ethernet names in the schematics (ETH0 and ETH1) are not mapped to the same logical name in the Linux kernel driver. So, the logical mapping for the devices is the following: J10 is eth1 device in Linux J38 is eth0 device in Linux

eth0 (on J38) is the default network interface used by the Linux root file system and configured as primary interface.

Device usage

The peripherals use the standard kernel interface and network protocol stack.