KTQ87/mITX Users Guide
KTD-N0882-D Page 26
5.2 Ethernet Connectors
The KTQ87 supports two channels of 10/100/1000Mb Ethernet, one (LAN1) is based on Intel®
Clarkville i218LM Gigabit PHY with AMT 9.0 support and one other controller (LAN2) are 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 connector 1 (LAN2) is mounted together with USB Ports 2 and 3.
Ethernet connector 2 (LAN1) is mounted together with USB Ports 0 and 1.
The pinout of the RJ45 connectors is as follows:
Signal
PIN
Type
Ioh/Iol
Note
MDI0+
MDI0-
MDI1+
MDI2+
MDI2-
MDI1-
MDI3+
MDI3-
8 7 6 5 4 3 2 1
IO-Area Connectors
