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10/100/1000 Ethernet PHY
The Arria 10 GX FPGA 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 SGMII using the Arria 10 GX FPGA LVDS pins in Soft-CDR mode at 1.25 Gbps
transmit and receive. In 10-Mb or 100-Mb mode, the SGMII interface still runs at 1.25 GHz but the
packet data is repeated 10 or 100 times. 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 HALO HFJ11-1G02E model RJ45 with internal
magnetics that can be used for driving copper lines with Ethernet traffic.
Table 5-17: Ethernet PHY Pin Assignments, Signal Names and Functions
Board Reference
(U15)
Schematic Signal
Name
FPGA Pin
Number
I/O Standard
Description
23
ENET_2P5V_
INTN
AG13
1.8 V
Management bus interrupt
25
ENET_2P5V_
MDC
AF13
1.8 V
Management bus data clock
24
ENET_2P5V_
MDIO
AL18
1.8 V
Management bus data
28
ENET_2P5V_
RESETN
AW23
1.8 V
Device reset
59
ENET_LED_
LINK10
—
2.5 V
10-Mb link LED
76
ENET_LED_
LINK10
—
2.5 V
10-Mb link LED
74
ENET_LED_
LINK100
—
2.5 V
100-Mb link LED
60
ENET_LED_
LINK1000
—
2.5 V
1000-Mb link LED
73
ENET_LED_
LINK1000
—
2.5 V
1000-Mb link LED
58
ENET_LED_RX
—
2.5 V
RX data active LED
69
ENET_LED_RX
—
2.5 V
RX data active LED
68
ENET_LED_TX
—
2.5 V
TX data active LED
5-28
10/100/1000 Ethernet PHY
UG-01170
2015.06.26
Altera Corporation
Board Components