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Ixiasoft
A.9.6. 10/100/1000Base-T Ethernet Connector
A copper Ethernet connector (RJ1) is provided on the PCIe bracket. This interface is implemented with Marvell 88E1111 10/100/1000Base-T Ethernet PHY.
The interface to FPGA is with SGMII through a pair of LVDS on FPGA. The PHY is managed with MDC/MDIO management interface. The signals used and hardware configuration pins of the Marvell device are shown in the table below:
Hardware Configuration Pins | Connection | Bits | Bit [2] | Bit [1] | Bit [0] |
---|---|---|---|---|---|
Config0 | GND | 000 | PHYADR [2:0] = 000 | ||
Config1 | GND | 000 | ENA_PAUSE = 0 | PHYADR [4:3] = 00 | |
Config2 | VDDO | 111 | ANEG [3:1] = 111 | ||
Config3 | GND | 000 | ANEG [0] = 0 | ENA_XC = 0 | DIS_125 = 0 |
Config4 | LED_1000 | 100 | HWCFG_MODE [2:0] = 100 | ||
Config5 | LED_10 | 110 | DIS_FC = 1 | DIS_SLEEP = 1 | HWCFG_MODE [3] = 0 |
Config6 | LED_RX | 010 | SEL_TWSI = 0 | INT_POL = 1 | 75/50 OHM = 0 |
The default hardware configuration is
- Select MDC/MDIO interface. PHY address is 5'b00000.
- INTn signal is active low
- 50 Ohm termination for SGMII
- Disable fiber/copper auto selection
- Hardware Configuration mode is "SGMII without Clock with SGMII Auto-Neg to copper"
- Energy detect is disabled
- Disable crossover
- PAUSE is disabled
The registers of the Marvell 88E1111 device can be changed with MDC/MDIO. The MDC/MDIO is connected to the FPGA device through a level translator.