Host-Side MAC
4450
col (N/C)
crs (N/C)
hx_gtxclk
hx_txclk
hx_txer
hx_ctrl_1
hx_ctrl_0
hx_clk_1
GTX_CLK
hx_clk_0
TX_CLK
TX_ER
hx_bus1[9]
hx_bus1[8]
hx_txen
TX_EN
hx_txd[7:0]
hx_bus1[7:0]
TXD[7:0]
hx_rxclk
hx_rxer
hx_clk_2
hx_bus0[9]
hx_bus0[8]
hx_bus0[7:0]
RX_CLK
RX_ER
hx_rxdv
RX_EN
hx_rxd[7:0]
RXD[7:0]
Note
1. hx = h0 or h1.
2. col and crs are internally terminated with a pulldown resistor.
Figure 6-5. GMII PHY-Mode
Host-Side MAC
4450
col (N/C)
hx_ctrl_1
hx_ctrl_0
COL
sigdet (N/C)
SIGDET
hx_txpmaclk
hx_txd9
hx_clk_1
hx_bus1[9]
hx_bus1[8]
hx_bus1[7:0]
TX_CLK
TX_ER
hx_txd8
TX_EN
hx_txd[7:0]
TXD[7:0]
hx_rxpmaclk0
hx_clk_0
hx_rxpmaclk
hx_rxd9
hx_clk_2
hx_bus0[9]
hx_bus0[8]
hx_bus0[7:0]
RX_CLK
RX_ER
hx_rxd8
RX_EN
hx_rxd[7:0]
RXD[7:0]
Note
1. hx = h0 or h1.
2. col and sigdet are internally terminated by the 4450 and NOT DRIVEN by the 4450. col and
sigdet may need termination on the MAC side.
Figure 6-6. TBI PHY-Mode
4450 – Data Sheet, DS-0131-06
Page36
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EXAR [ EXAR CORPORATION ]
