Specifications

Chapter 3 Hardware

26 Reference Manual CoreModule 720

Ethernet Interface

The CoreModule 720 supports one Gigabit Ethernet interface. The Ethernet interface is implemented from

the 82574IT Ethernet controller and provides oneGLAN interface, which occupies PCI Express port 2. The

Ethernet function supports multi-speed operation at 10/100/1000 Mbps and operates in full-duplex at all

supported speeds or half duplex at 10/100 Mbps while adhering to the IEEE 802.3x flow control

specification. The Ethernet interface offers the following features:

• Full duplex or half duplex support at 10 Mbps, 100 Mbps, or 1000 Mbps

• In full duplex mode, the Ethernet controller adheres to the IEEE 802.3x Flow Control specification

• In half duplex mode, performance is enhanced by a proprietary collision reduction mechanism

• IEEE 802.3 compatible physical layer to wire transformer

• IEEE 802.3u Auto-Negotiation support

• Fast back-to-back transmission support with minimum interframe spacing (IFS)

• IEEE 802.3x auto-negotiation support for speed and duplex operation

• On-board magnetics (Ethernet isolation transformer)

Table 3-9 describes the pin signals of the Ethernet interface, which consists of a two-row, 10-pin shrouded

header in two rows of odd/even (1,2) pin sequence, and 0.079" (2mm) pitch.

Note: The shaded table cells denote ground.

Table 3-9. Ethernet Interface Pin Signal Descriptions (J8)

Pin # Signal Description

GND Ground

GND

3 MDI0+ Media Dependent Interface 0 +/-

4MDI0-

5 MDI1+ Media Dependent Interface 1 +/-

6MDI1-

7 MDI2+ Media Dependent Interface 2 +/-

8MDI2-

9 MDI3+ Media Dependent Interface 3 +/-

10 MDI3-

NOTE The magnetics (isolation transformer, T1) for the Ethernet connector is included

on the CoreModule 720.