Xilinx LOGICORE UG144 - Manual (Page 71)

1-Gigabit Ethernet MAC v8.5 User Guide www.xilinx.com 71
UG144 April 24, 2009
Implementing External RGMII R
-- DISCONTINUED PRODUCT --
Figure 7-7: External RGMII Receiver Logic
rgmii_rxc
IBUFG
IOB LOGIC
IPAD
rgmii_rxd[0]
IBUF
IPAD D Q
1-Gigabit Ethernet MAC Core
gmii_rxd_reg[0]
gmii_rx_dv_reg
gmii_rx_er_reg
gmii_rx_clk
gmii_rxd[0]
gmii_rx_dv
gmii_rx_er
BUFG
IOB LOGIC
DCM
CLKIN CLK0
FB
gmii_rx_clk_bufg
D Q D Q
rgmii_rxd_ddr[0] rgmii_rxd_reg[0]
D Q D Q D Q
rgmii_rxd_ddr[4] rgmii_rxd_reg[4]
gmii_rxd_reg[4]
gmii_rxd[4]
rgmii_rx_ctl
IBUF
IPAD D Q D Q D Q
rgmii_rx_dv_ddr rgmii_rx_dv_reg
D Q D Q D Q
rgmii_rx_ctl_ddr rgmii_rx_ctl_reg