ECX-BYT - User Guide, Rev. 1.0
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6.3.
Ethernet Connectors (LAN1 & LAN2)
The ECX-BYT supports two channels of 10/100/1000 Mbit Ethernet, which are based Intel® I210-AT, and Realtek
RTL8111G controllers respectively.
In order to achieve the specified performance of the Ethernet port, Category 5 twisted pair cables must be used with
10/100 MByte and Category 5E, 6 or 6E with 1 Gbit LAN networks.
The signals for the Ethernet ports are as follows:
Figure 7: Ethernet Connectors LAN1, LAN2
8 7 6 5 4 3 2 1
Table 14: Pin Assignment Ethernet Connectors CN11, CN12
Pin
Signal
Note
1
TX1+
2
TX1-
3
TX2+
4
TX3+
5
TX3-
6
TX2-
7
TX4+
8
TX4-
Signal Description
Signal
Description
TX1+ / TX1-
In MDI mode, this is the first pair in 1000Base-T, i.e. the BI_DA+/- pair, and is the transmit pair in
10Base-T and 100Base-TX. In MDI crossover mode, this pair acts as the BI_DB+/- pair, and is the
receive pair in 10Base-T and 100Base-TX.
TX2+ / TX2-
In MDI mode, this is the second pair in 1000Base-T, i.e. the BI_DB+/- pair, and is the receive pair in
10Base-T and 100Base-TX. In MDI crossover mode, this pair acts as the BI_DA+/- pair, and is the
transmit pair in 10Base-T and 100Base-TX.
TX3+ / TX3-
In MDI mode, this is the third pair in 1000Base-T, i.e. the BI_DC+/- pair. In MDI crossover mode, this
pair acts as the BI_DD+/- pair.
TX4+ / TX4-
In MDI mode, this is the fourth pair in 1000Base-T, i.e. the BI_DD+/- pair.In MDI crossover mode, this
pair acts as the BI_DC+/- pair.
'MDI' – media dependent Interface
LED satatus:
Orange - 1000 Mbit/s link established
Green - 100 Mbit/s link established
Off - 10 Mbit/s link established
LED satatus:
Off - Link is down
Flasing Green - Link is up and active
Steady Green - Link is up, no activity
