Ethernet Interface (J3); Ethernet Connector; Ethernet Status Leds - VersaLogic Ocelot Reference Manual

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Datasheet of VL-CBR-2012 - 20" 24-BIT LVDS CABLE
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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 C
THERNET 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.
J3
Pin
1
2
3
4
5
6
7
8
E S
THERNET TATUS
The RJ-45 connector has two built-in LEDs to provide an indication of the Ethernet status as
shown in the following table.
VL-EPMs-21 Reference Manual
Table 7: RJ45 Ethernet Connector Pinout
Fast Ethernet
Signal
Name Function
T+ Transmit Data +
Transmit Data –
T–
R+ Receive Data +
IGND Isolated Ground
IGND Isolated Ground
Receive Data –
R–
IGND Isolated Ground
IGND Isolated Ground
LED
S
Table 8: Ethernet Status LEDs
LED State
Green/Orange Orange
(Link Speed)
Green
Off
Yellow (Activity) On
Off
Gigabit Ethernet
Signal
Name Function
MID0+ Media Dependent Interface [0]+
MID0– Media Dependent Interface [0]–
MID1+ Media Dependent Interface [1]+
MID2+ Media Dependent Interface [2]+
MID2– Media Dependent Interface [2]–
MID1– Media Dependent Interface [1]–
MID3+ Media Dependent Interface [3]+
MID3– Media Dependent Interface [3]–
Description
1 Gbps speed
100 Mbps speed
10 Mbps speed or cable not plugged
into active hub
Activity detected on cable
(intermittent with activity)
No activity detected on cable
Interfaces and Connectors
28