Altera Cyclone IV GX FPGA Development Board - Manual (Page 36)

2–28 Chapter 2: Board Components
Components and Transceiver Interfaces
Cyclone IV GX FPGA Development Board May 2013 Altera Corporation
Reference Manual
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 RGMII 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 1.1-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.
Figure 2–6 shows the RGMII interface between the FPGA (MAC) and Marvell 88E1111
PHY.
Table 2–30 lists the Ethernet PHY interface pin assignments.
Figure 2–6. SGMII Interface between FPGA (MAC) and Marvell 88E1111 PHY
10/100/1000 Mbps
Ethernet MAC
Marvell 88E1111
PHY
Device
RJ45
RGMII Interface
Translator
(1.8 V to 2.5 V)
Table 2–30. Ethernet PHY Pin Assignments, Signal Names and Functions
Board Reference Description
Schematic Signal Name
I/O Standard
Cyclone IV GX
Device
Pin Number
U21.11 RGMII TX data ENET_T_TX_D0
1.8-V CMOS
G10
U21.12 RGMII TX data ENET_T_TX_D1 E3
U21.13 RGMII TX data ENET_T_TX_D2 D10
U21.14 RGMII TX data ENET_T_TX_D3 B10
U21.8 RGMII TX clock ENET_T_GTX_CLK D9
U21.9 RGMII TX control ENET_T_TX_EN A27
U21.95 RGMII RX data ENET_T_RX_D0 F5
U21.92 RGMII RX data ENET_T_RX_D1 B9
U21.93 RGMII RX data ENET_T_RX_D2 G14
U21.91 RGMII RX data ENET_T_RX_D3 E13
U21.2 RGMII RX clock ENET_T_RX_CLK B15
U21.94 RGMII RX data valid ENET_T_RX_DV E15
U21.25 Management bus control ENET_T_MDC K21
U21.24 Management bus data ENET_T_MDIO G7
U21.23 Management bus interrupt ENET_T_INTN A11
U21.28 Device reset ENET_T_RESETn D6
U21.68 RX data active LED ENET_LED_TX —
U21.69 TX data active LED ENET_LED_RX —
U21.76 10 Mbps connection speed LED ENET_LED_LINK10 —