Altera Cyclone IV GX Transceiver Starter Board Bedienungsanleitung PDF herunterladen (Seite 29)

Chapter 2: Board Components 2–21

Components and Transceiver Interfaces

10/100/1000 Ethernet

A Marvell 88E1111 PHY device is used for 10/100/1000 BASE-T Ethernet connection.

The device is an auto-negotiating Ethernet PHY with an SGMII interface to the FPGA.

The MAC function must be provided in the FPGA for typical networking applications

such the Altera Triple Speed Ethernet MegaCore design. The Marvell 88E1111 PHY

uses 2.5-V and 1.2-V power rails and requires a 25-MHz reference clock driven from a

dedicated oscillator. The device interfaces to a Halo Electronics HFJ11-1G02E model

RJ45 with internal magnetics that can be used for driving copper lines with Ethernet

traffic.

By default, the GXB_RX1 and GXB_TX1 channels of the FPGA are connected to the

Ethernet PHY as shown in

Table 2–27 on page 2–22.

Figure 2–6 shows the SGMII interface between the FPGA (MAC) and Marvell 88E1111

PHY.

Table 2–25 lists the Ethernet PHY interface pin assignments.

Table 2–26 lists the Ethernet PHY interface component reference and manufacturing

information.

Figure 2–6. SGMII Interface between FPGA (MAC) and Marvell 88E1111 PHY

10/100/1000 Mbps

Ethernet MAC

Marvell 88E1111

PHY

Device

RJ45

SGMII Interface

Table 2–25. Ethernet PHY Pin Assignments, Signal Names and Functions

Board Reference Description Schematic Signal Name I/O Standard

Cyclone IV GX

Device

Pin Number

U9.82 SGMII TX data ENET_TX_P

1.4-V PCML

U9.81 SGMII TX data ENET_TX_N C1

U9.77 SGMII RX data ENET_RX_P E2

U9.75 SGMII RX data ENET_RX_N E1

U9.25 Management bus control ENET_MDC

2.5-V

U9.24 Management bus data ENET_MDIO K8

U9.23 Management bus interrupt ENET_INTn F12

U9.28 Device reset ENET_RESETn K9

Table 2–26. Ethernet PHY Component Reference and Manufacturing Information

Board

Reference Description Manufacturer

Manufacturing

Part Number

Manufacturer

Website

U9 Ethernet PHY BASE-T device Marvell Semiconductor 88E1111-B2-CAAIC000 www.marvell.com

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