Xilinx 1000BASE-X - Manual (Page 67)

Ethernet 1000BASE-X PCS/PMA or SGMII v9.1 www.xilinx.com 67
UG155 March 24, 2008
Implementing External GMII R
Figure 5-18: External GMII Receiver Logic
IOB LOGIC
OBUFT
FDDRRSE
OPAD
D Q
'0'
'1'
gmii_rxd_obuf[0]
OPAD
OPAD
OPAD
OBUFT
OBUFT
OBUFT
D Q
D Q
D Q
D Q
gmii_rx_dv_obuf
gmii_rx_er_obuf
gmii_rxd[0]
gmii_rx_dv
gmii_rx_er
gmii_rx_clk
gmii_rx_clk_obuf
gmii_rxd[0]
gmii_rx_dv
gmii_rx_er
Ethernet 1000BASE-X
PCS/PMA
or SGMII LogiCORE
gmii_isolate
userclk2 (if RocketIO is used)
gtx_clk (if TBI is used)