User Guide

Application Note 9
6 GND Ground signal
7 LED2 On receiving packets
8 GND Ground signal
9 TX+ 100/10Base-T transmit data
10 TX- 100/10Base-T transmit data
J9: Status LEDs
The HDD and Ethernet activity LEDs are implemented on the J9 connector. It is a 3x2 pin - 2mm step.
The following table shows the J9 connector pinout:
Table 3. J9 LED Connector
Pin Signal Function
1
VDD IDE LED anode
2
IDE LED IDE LED cathode
3
5V_LAN LAN LEDs
common anode
4
LAN LED 2 LAN LED cathode
5
LAN LED 0 LAN LED cathode
6
LAN LED 1 LAN LED cathode
The meaning of LAN LEDs is the following:
 LAN LED 0: TX
 LAN LED 1: Link 10/100 (LAN LED 1 signals that the correct connection is established)
 LAN LED 2: RX
Ethernet physical adapter
Note: To establish a connection to the Ethernet, the Eurotech Ethernet Adapter can be plugged
between the CPU board (to the J4 connector) and the net cable.
It is shown below.
RJ45 Connector
To CPU Board
Ethernet
Connector
Figure 3. Eurotech Ethernet Adapter
The green led is fixed, and signals the correct connection of the module.
The yellow led blinks when there is activity (data IN/OUT) on the net connection.
With RJ45 connectors, only twisted pair cables can be used.