Xilinx LOGICORE UG144 - Manual (Page 62)

62 www.xilinx.com 1-Gigabit Ethernet MAC v8.5 User Guide
UG144 April 24, 2009
Chapter 7: Using the Physical Side Interface R
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Figure 7-1: External GMII Transmitter Logic
IPAD
IBUFG
IOB LOGIC
gtx_clk
BUFG
gtx_clk_bufg
gmii_tx_clk
OBUF
FDDRRSE
IOB LOGIC
OPAD
D Q
D Q
'0'
'1'
D Q
gmii_txd[0]
OBUF
OPAD
gmii_txd_reg[0]
D Q
gmii_tx_en
OBUF
OPAD
gmii_tx_en_reg
D Q
gmii_tx_er
OBUF
OPAD
gmii_tx_er_reg
1-Gigabit Ethernet MAC LogiCORE
gmii_txd_int[0]
gmii_tx_en_int
gmii_tx_er_int
gtx_clk gmii_txd[0]
gmii_tx_en
gmii_tx_er