Chapter 13
Ethernet Controller
Kontron User's Guide PC/104-520
27
13.
Ethernet Controller
The PC/104-520 uses a Intel 82551ER PCI Fast Ethernet Controller. The network controllers support 10/100
Base-T interfaces. The devices auto-negotiate the use of a 10 Mbit/sec or 100 Mbit/sec connection.
13.1
Connector
The Ethernet interface is available through Connector J7 (4 pins). To have the signals of the Ethernet
connection available on a standard RJ45 connector, you need an adapter cable, which is offered by Kontron
(KAB-PC104520-ETN, Part Number 96231-0200-00-0).
The following table shows the pinout.
Header
Pin
Signal Name
Function
In/Out
1
TXD+
Transmitter
Differential Output
2
TXD-
Transmitter
Differential Output
3
RXD+
Receiver
Differential Input
1
4
RXD-
Receiver
Differential Input
Note:
TXD+, TXD- differential-output pair drives 10 and 100 Mb/s Manchester-encoded data to 100/10 BASE-T trans-
mit lines. RXD+, RXD- differential input pair receives 10 and 100 Mb/s Manchester-encoded data from 100/
10BASE-T receive lines.
To find the location of the Ethernet interface on the PC/104-520 board, please see the Appendix “Connector
Layout”.
