DE10-Advance Hardware Manual revC Chapter5 Gigabit Ethernet
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5.2 Gigabit Ethernet
The board supports Gigabit Ethernet transfer by an external Micrel KSZ9031RNX PHY chip and HPS Ethernet MAC function. The KSZ9031RNX chip with integrated 10/100/1000 Mbps Gigabit Ethernet transceiver also supports RGMII MAC interface. Figure 5-1 shows the connections between the HPS, Gigabit Ethernet PHY, and RJ-45 connector. The pin assignment associated with Gigabit Ethernet interface is listed in Table 5-2. More information about the KSZ9031RNX PHY chip and its datasheet, as well as the application notes, is available on the manufacturer’s website.
- Figure 5-1 Connections between the HPS and Gigabit Ethernet
- Table 5-2 Pin Assignment of Gigabit Ethernet PHY
Signal Name FPGA Pin Number Description I/O Standard HPS_ENET_GTX_CLK PIN_F25 GMII Transmit Clock 1.8V HPS_ENET_MDC PIN_D24 Management Data Clock Reference 1.8V HPS_ENET_MDIO PIN_C24 Management Data 1.8V HPS_ENET_RX_CLK PIN_K22 GMII and MII receive clock 1.8V HPS_ENET_RX_DATA[0] PIN_H23 GMII and MII receive data[0] 1.8V HPS_ENET_RX_DATA[1] PIN_J23 GMII and MII receive data[1] 1.8V HPS_ENET_RX_DATA[2] PIN_F24 GMII and MII receive data[2] 1.8V HPS_ENET_RX_DATA[3] PIN_G24 GMII and MII receive data[3] 1.8V HPS_ENET_RX_DV PIN_L22 GMII and MII receive data valid 1.8V HPS_ENET_TX_DATA[0] PIN_H24 MII transmit data[0] 1.8V HPS_ENET_TX_DATA[1] PIN_J24 MII transmit data[1] 1.8V HPS_ENET_TX_DATA[2] PIN_M22 MII transmit data[2] 1.8V HPS_ENET_TX_DATA[3] PIN_M21 MII transmit data[3] 1.8V HPS_ENET_TX_EN PIN_G25 GMII and MII transmit enable 1.8V
There are four LEDs, two green LEDs(LEDG) and two yellow LEDs(LEDY), which represent the status of Ethernet PHY (KSZ9031RNX). The LED control signals are connected to the LEDs on the RJ45 connector. The state and definition of LEDG and LEDY are listed in Table 5-3. For instance, the connection from board to Gigabit Ethernet is established once the LEDG lights on.
- Table 5-3 State and Definition of LED Mode Pins
LED (State) LED (Definition) Link /Activity LEDG LEDY LEDG LEDY H H OFF OFF Link off L H ON OFF 1000 Link / No Activity Toggle H Blinking OFF 1000 Link / Activity (RX, TX) H L OFF ON 100 Link / No Activity H Toggle OFF Blinking 100 Link / Activity (RX, TX) L L ON ON 10 Link/ No Activity Toggle Toggle Blinking Blinking 10 Link / Activity (RX, TX)
