Interfaces and Connectors
EBX-11 Reference manual
42
Ethernet Interface
The EBX-11 features two Intel 82551ER Fast Ethernet controllers on-board. While these
controllers are not NE2000-compatible, they are widely supported. Drivers are readily available
to support a variety of operating systems. See VersaLogic website for latest OS support.
BIOS
C
ONFIGURATION
Each Ethernet controller can be enabled or disabled in CMOS Setup. Ethernet interface 0 (J1)
uses PCI interrupt “INTA#” and Ethernet interface 1 (J2) uses PCI interrupt “INTB#”. CMOS
Setup is used to select the IRQ line routed to each PCI interrupt line.
S
TATUS
LED
Each Ethernet controller has a two-colored LED located next to its RJ-45 connector to provide an
indication of the Ethernet status as follows:
Green LED (Link):
ON
Active Ethernet cable plugged in
OFF
Active cable not plugged in
or cable not plugged into active hub
Yellow LED (Activity):
ON
Activity detected on cable
OFF
No Activity detected on cable
E
THERNET
C
ONNECTOR
Board-mounted RJ-45 connectors are provided to make connections with Category 5 Ethernet
cables. The 82551ER Ethernet controller auto-detects 10BaseT/100Base-TX connectors.
These connectors use IEC 61000-4-2-rated TVS components to help protect against ESD
damage.
Table 20: RJ-45 Ethernet Connector
Fast Ethernet
Gigabit Ethernet
J1/J2
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]
-
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