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
T
WISTED
P
AIR
E
THERNET
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+
R
3
2
MDI_B-
Receive -
6
3
MDI_C+
Not Used
4
4
MDI_C-
Not Used
5
5
MDI_A+
Tr
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
Facing the connector pins, the pin out is pictured in the following.
9
7
5
3
1
Shield Ground
MDI_D+
MDI_A+
MDI_C+
MDI_B+
Shield Ground
MDI_D-
MDI_A-
MDI_C-
MDI_B-
10
8
6
4
2
Table 6: DIL Connector Pinout
3.3.4
S
TATUS
LED
S
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 7: Status LEDs
3.3.5
E
XTERNAL
S
TATUS
LED
C
ONNECTORS
CN14
AND
CN15
CN14 and CN15 are the status LED signals that are buffered and able to source or sink 24 mA. Additionally, JP1 and JP2 can select either 3.3
volts or ground to use with these signals. The pin out is in the tables below.
CN14 Pin
Function
10/100 Function
1
CN5 Link at 10 Mbps
Low when linked at 10 Mbps, blink for activity
3
CN5 Link at 100 Mbps
Low when linked at 100 Mbps, blink for activity
