Distributor of VersaLogic Corporation: Excellent Integrated System Limited
Datasheet of VL-CBR-2012 - 20" 24-BIT LVDS CABLE
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Interfaces and Connectors
VL-EPMs-21 Reference Manual
28
Ethernet Interface (J3)
The VL-EPMs-21 features an on-board Intel 82574IT gigabit Ethernet controller, which provides
a standard IEEE 802.3 Ethernet interface for 1000Base-T, 100Base-T, 100Base-TX, and 10Base-
T applications. The 82574IT consumes one PCIe lane operating at 2.5 Mbps with sufficient
bandwidth to support a 1000 Mbps transfer rate.
E
THERNET
C
ONNECTOR
A board-mounted RJ45 connector is provided to make connection with a Category 5 or 6 Ethernet
cable. The 82574IT Ethernet controller auto-negotiates connection speed. The interface uses IEC
61000-4-2-rated TVS components to help protect against ESD damage.
Table 7: RJ45 Ethernet Connector Pinout
Fast Ethernet
Gigabit Ethernet
J3
Pin
Signal
Name
Function
Signal
Name
Function
1
T+
Transmit Data +
MID0+
Media Dependent Interface [0]+
2
T
–
Transmit Data
– MID0–
Media Dependent Interface [0]
–
3
R+
Receive Data +
MID1+
Media Dependent Interface [1]+
4
IGND
Isolated Ground
MID2+
Media Dependent Interface [2]+
5
IGND
Isolated Ground
MID2
–
Media Dependent Interface [2]
–
6
R
–
Receive Data
–
MID1
–
Media Dependent Interface [1]
–
7
IGND
Isolated Ground
MID3+
Media Dependent Interface [3]+
8
IGND
Isolated Ground
MID3
–
Media Dependent Interface [3]
–
E
THERNET
S
TATUS
LED
S
The RJ-45 connector has two built-in LEDs to provide an indication of the Ethernet status as
shown in the following table.
Table 8: Ethernet Status LEDs
LED
State
Description
Green/Orange
(Link Speed)
Orange
1 Gbps speed
Green
100 Mbps speed
Off
10 Mbps speed or cable not plugged
into active hub
Yellow (Activity)
On
Activity detected on cable
(intermittent with activity)
Off
No activity detected on cable
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