6.2 Ethernet Connectors
The KTQ87/KTH81 supports two channels of 10/100/1000Mb Ethernet. First Ethernet connector (LAN1) is
based on Intel® Clarkville i218LM/i218-V Gigabit PHY. The i218-LM (Q87) has AMT 9.0 support and the
i218-V (H81) has no AMT support. Second Ethernet connector (LAN2) is based on Intel® Pearsonville
i218AT PCI Express controller.
In order to achieve the specified performance of the Ethernet port, Category 5 twisted pair cables must be
used with 10/100MB and Category 5E, 6 or 6E with 1Gb LAN networks.
The signals for the Ethernet ports are as follows:
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.
Note: MDI = Media Dependent Interface.
Ethernet LAN1 is mounted together with USB Ports 2 and 3.
Ethernet LAN2 is mounted together with USB Ports 0 and 1.
The pinout of the RJ45 connectors is as follows:
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