User`s manual

RTD Embedded Technologies, Inc. | www.rtd.com 12 LAN25255HR/LAN35255HR User’s Manual
CN5, CN7, CN9, and CN11 are standard female RJ-45 connectors. The figure below shows the pin numbering when looking into the
connector:
Figure 2: RJ-45 Jack Connector
3.3.3 TWISTED PAIR ETHERNET CN4, CN6, CN8, AND CN10
CN4, CN6, CN8, and CN10 are optional connectors which can be factory installed in place of the RJ45 connector. This connector is not
installed when the RJ45 connector is installed. The pin out of CN4, CN6, CN8, and CN10 is in the table below.
Pin
1000 Function
10/100 Function
RJ-45 Pin
1
MDI_B+
Receive +
3
2
MDI_B-
Receive -
6
3
MDI_C+
Not Used
4
4
MDI_C-
Not Used
5
5
MDI_A+
Transmit +
1
6
MDI_A-
Transmit -
2
7
MDI_D+
Not Used
7
8
MDI_D-
Not Used
8
9
Shield Ground
10
Shield Ground
Table 5: DIL Signal Assignments
Figure 3: DIL Pin Number Assignment
3.3.4 STATUS LEDS
The tri-color LEDs on the board are used to indicate the status of the Ethernet ports.
LED Color
Description
Off
No Link
Green
Link at 1000 Mbps
Blue
Link at 100 Mbps
Red
Link at 10 Mbps
Blink
Activity
Table 6: Status LEDs