Arria® 10 FPGA Development Kit User Guide

ID 683526
Date 5/15/2024
Public
Document Table of Contents

6.7.2. 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 Triple-Speed Ethernet MAC IP 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.

Figure 33. SGMII Interface between FPGA (MAC) and Marvell 88E1111 PHY
Table 32.  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

30

ENET_RSET

AW23

1.8 V

Device reset

75

ENET_RX_N

AW24

LVDS

SGMII receive channel

77

ENET_RX_P

AV24

SGMII receive channel

81

ENET_TX_N

BD23

SGMII transmit channel

82

ENET_TX_P

BC23

SGMII transmit channel

55

ENET_XTAL_25MHZ

2.5 V

25-MHz RGMII transmit clock

31

MDI_N0

Media dependent interface

34

MDI_N1

41

MDI_N2

43

MDI_N3

29

MDI_P0

33

MDI_P1

39

MDI_P2

42

MDI_P3