14
ECP5 Versa Development Board
Ethernet Interfaces
(See Appendix A, sheets 5 and 6 "10/100/1000-T PHY#x/RJ45")
Two Marvell 88E1512 Gigabit Ethernet transceiver devices (U14 and U15) are included on the board. These phys-
ical layer devices support 1000BAS
E-T, 100BASE-TX, and 10BASE-T applications via a standard media interface
to a dual RJ45 connection. The RJ45 connection includes network magnetics providing the proper signal condition-
ing, electro-magnetic interference suppression and signal isolat
ion. Each connector includes two LEDs which are
controlled by the 88E1512 devices. Detailed descriptions are available in the Marvell device data sheet.
Table 10. PHY Status Indicators
LED Status Description
RJ45 (Yellow) Data RX/TX
RJ45 (Green/Orange) Link State
Each Marvell 88E1512 device communicates via a RGMII interface to the ECP5 device.
Table 11. FPGA GPIO to RGMII Interfaces
Signal Phy1 Phy2
CLK125 L19 J20
CLK125Pll U16 C18
Config T17 G20
Resetn U17 F20
TXCLK P19 C20
TX_D0 N19 J17
TX_D1 N20 J16
TX_D2 P18 D19
TX_D3 P20 D20
TXCTRL R20 E19
RXCLK L20 J19
RX_D0 T20 G18
RX_D1 U20 G16
RX_D2 T19 H18
RX_D3 R18 H17
RXCTRL U19 F19
MDIO U18 H20
MDC T18 G19
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