Figure 7-1, Illu, Chapter 7: using the physical side interface – Xilinx LOGICORE UG144 User Manual
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1-Gigabit Ethernet MAC v8.5 User Guide
UG144 April 24, 2009
Chapter 7: Using the Physical Side Interface
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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