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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)