mITX-SKL-S-C236 Doc. Rev. 1.6
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6.3.
Ethernet Connectors (I/O area)
The mITX-SKL-S-C236 supports three channels of 10/100/1000 Mbit/s Ethernet (LAN1 to LAN3).
In order to achieve the specified performance of the Ethernet port, Category 5 twisted pair cables must be used with
10/100 MByte/s and Category 5E, 6 or 6E with 1 Gbit/s LAN networks.
Figure 5: Ethernet Connector
Table 7: Ethernet Connector Pin Assignment
Pin
Signal
Ethernet 10
BaseT/100BaseT
Gigabit-Ethernet
1
MDI0+
TX+
D1+
2
MDI0-
TX-
D1-
3
MDI1+
RX+
D2+
4
MDI1-
D3+
5
MDI2+
D3-
6
MDI2-
RX-
D2-
7
MDI3+
D4+
8
MDI3-
D4-
Table 8: Signal Description
Signal
Description
MDI[0]+ / MDI[0]-
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.
MDI[1]+ / MDI[1]-
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.
MDI[2]+ / MDI[2]-
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.
MDI[3]+ / MDI[3]-
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.
8 7 6 5 4 3 2 1
LED status:
Orange - 1000 Mbit/s link
established
Green - 100 Mbit/s link
established
Off - 10 Mbit/s Link
established
LED status:
Off – Link is down
Flashing Green: Link is up
and active
Steady Green: Link is up,
no activity
