BECKHOFF EtherCAT IP Core for Altera FPGAs v3.0.10 - Manual (Page 96)

Ethernet Interface
III-84 Slave Controller – IP Core for Altera FPGAs
EtherCAT
device
nRGMII_LINK
CLK25_2NS
RGMII_RX_CLK
RGMII_RX_CTL_DATA_DDR_NRESET
RGMII_RX_CTL_DATA_DDR_CLK
RGMII_RX_CTL_DDR_L
RGMII_RX_CTL_DDR_H
NPHY_RESET_OUT
RGMII_RX_DATA_DDR_L[3:0]
RGMII_RX_DATA_DDR_H[3:0]
RGMII_TX_CLK_DDR_NRESET
RGMII_TX_CLK_DDR_CLK
RGMII_TX_CLK_DDR_L
RGMII_TX_CLK_DDR_H
RGMII_TX_CTL_DATA_DDR_NRESET
RGMII_TX_CTL_DATA_DDR_CLK
RGMII_TX_CTL_DDR_L
RGMII_TX_CTL_DDR_H
RGMII_TX_DATA_DDR_L[3:0]
RGMII_TX_DATA_DDR_H[3:0]
Figure 31: RGMII Interface signals
Table 41: RGMII Interface signals
Signal
Dire
ction
Description
CLK25_2NS IN 25 MHz clock signal from PLL (rising edge 2 ns
after rising edge of CLK25), used for RGMII
GTX_CLK
nRGMII_LINK IN Input signal provided by the PHY if a 100 Mbit/s
(Full Duplex) link is established (alias LINK_MII)
RGMII_RX_CLK IN Receive clock
RGMII_RX_CTL_DATA_DDR_CLK OUT Receive control/data DDR input clock
RGMII_RX_CTL_DATA_DDR_NRESET OUT Receive control/data DDR input reset (act. Low)
RGMII_RX_CTL_DDR_L IN Receive control DDR input low
RGMII_RX_CTL_DDR_H IN Receive control DDR input high
RGMII_RX_DATA_DDR_L[3:0] IN Receive data DDR input low
RGMII_RX_DATA_DDR_H[3:0] IN Receive data DDR input high
RGMII_TX_CLK_DDR_CLK OUT Transmit clock DDR output clock
RGMII_TX_CLK_DDR_NRESET OUT Transmit clock DDR output reset (act. Low)
RGMII_TX_CLK_DDR_L OUT Transmit clock DDR output low
RGMII_TX_CLK_DDR_H OUT Transmit clock DDR output high
RGMII_TX_CTL_DATA_DDR_CLK OUT Transmit control/data DDR output clock
RGMII_TX_CTL_DATA_DDR_NRESET OUT Transmit control/data DDR output reset (act.
Low)
RGMII_TX_CTL_DDR_L OUT Transmit control DDR output low
RGMII_TX_CTL_DDR_H OUT Transmit control DDR output high
RGMII_TX_DATA_DDR_L[3:0] OUT Transmit data DDR output low
RGMII_TX_DATA_DDR_H[3:0] OUT Transmit data DDR output high
NPHY_RESET_OUT OUT PHY reset (akt. Low), resets PHY while ESC is
in Reset state, and, for FX PHYs, if Enhanced
Link Detection detects a lost link
NOTE: A pull-down resistor is typically required for NPHY_RESET_OUT to hold the PHY in reset state while the
FPGA is configured, since this pin is floating or even pulled up during that time.