Altera Cyclone V GX FPGA Development Board - Manual (Page 34)

2–26 Chapter 2: Board Components
Components and Interfaces
Cyclone V GX FPGA Development Board May 2013 Altera Corporation
Reference Manual
10/100/1000 Ethernet
The development board supports 10/100/1000 base-T Ethernet using an external
Marvell 88E1111 PHY and Altera Triple-Speed Ethernet MegaCore MAC function. The
PHY-to-MAC interface employs a RGMII interface. The MAC function must be
provided in the FPGA for typical networking applications.
The Marvell 88E1111 PHY uses 2.5-V and 1.0-V power rails and requires a 25-MHz
reference clock driven from a dedicated oscillator. The PHY interfaces to a RJ45 model
with internal magnetics that can be used for driving copper lines with Ethernet traffic.
Figure 2–7 shows the RGMII interface between the FPGA (MAC) and Marvell 88E1111
PHY.
Table 2–23 lists the Ethernet PHY interface pin assignments.
A25 PCIE_TX_P2 AB4 1.5-V PCML Transmit bus
A26 PCIE_TX_N2 AB3 1.5-V PCML Transmit bus
A29 PCIE_TX_P3 Y4 1.5-V PCML Transmit bus
A30 PCIE_TX_N3 Y3 1.5-V PCML Transmit bus
B11 PCIE_WAKEn Y27 2.5-V Wake signal
Table 2–22. PCI Express Pin Assignments, Schematic Signal Names, and Functions
Board
Reference (J19)
Schematic Signal Name
Cyclone V GX
Pin Number
I/O Standard Description
Figure 2–7. RGMII Interface between FPGA (MAC) and Marvell 88E1111 PHY
10/100/1000 Mbps
Ethernet MAC
Marvell 88E1111
PHY
Device
Transformer RJ45
RGMII Interface
TXD[3:0]
RXD[3:0]
CAT 5 UTP:
- 10BASE-T
- 100BASE-TX
- 1000BASE-T
Table 2–23. Ethernet PHY Pin Assignments, Signal Names and Functions (Part 1 of 2)
Board
Reference (U10)
Schematic Signal Name
Cyclone V GX
Pin Number
I/O Standard Description
8 ENET_GTX_CLK U9 2.5-V CMOS 125-MHz RGMII transmit clock
23 ENET_INTN B17 2.5-V CMOS Management bus interrupt
60 ENET_LED_DUPLEX — 2.5-V CMOS Duplex or collision LED. Not used
70 ENET_LED_DUPLEX — 2.5-V CMOS Duplex or collision LED. Not used
76 ENET_LED_LINK10 — 2.5-V CMOS 10-Mb link LED
74 ENET_LED_LINK100 — 2.5-V CMOS 100-Mb link LED
73 ENET_LED_LINK1000 — 2.5-V CMOS 1000-Mb link LED
58 ENET_LED_RX — 2.5-V CMOS RX data active LED
69 ENET_LED_RX — 2.5-V CMOS RX data active LED
68 ENET_LED_TX — 2.5-V CMOS TX data active LED
25 ENET_MDC C17 2.5-V CMOS Management bus data clock