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R
GTX_CLK
PHYEMAC#GTXCLK
TX Client
Logic
CLIENTEMAC#TXCLIENTCLKIN
BUFG
EMAC#CLIENTTXCLIENTCLKOUT
RX Client
Logic
CLIENTEMAC#RXCLIENTCLKIN
BUFG
EMAC#CLIENTRXCLIENTCLKOUT
CLIENTEMAC#DCMLOCKED
Notes:
1) A regional buffer (BUFR) can replace this BUFG.
Refer to the Virtex-4 User Guide for BUFR usage guidelines.
www.BDTIC.com/XILINX
Embedded Tri-Mode Ethernet MAC User Guide
UG074 (v2.2) February 22, 2010
EMAC#
CLIENTEMAC#TXGMIIMIICLKIN
EMAC#CLIENTTXGMIIMIICLKOUT
EMAC#PHYTXD[3:0]
EMAC#PHYTXD[7:4]
PHYEMAC#MIITXCLK
PHYEMAC#RXD[3:0]
PHYEMAC#RXD[7:4]
PHYEMAC#RXCLK
Figure 4-16: Tri-Mode RGMII v1.3 Clock Management
www.xilinx.com
ODDR
OBUF
1
D1
Q
0
D2
BUFG
(1)
ODDR
OBUF
D1
Q
D2
IBUF
Q1
D
Q2
DCM
1
0
CLK0
CLKIN
BUFGMUX
CLKFB
10/100/1000 RGMII
RGMII_TXC_#
RGMII_TXD_#[3:0]
RGMII_RXD_#[3:0]
SPEED_IS_10_100
IBUFG
RGMII_RXC_#
UG074_3_67_031009
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