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118 www.xilinx.com Ethernet AVB Endpoint User Guide
UG492 July 23, 2010
Chapter 12: System Integration
Because the EMAC core can often be used in different clocking modes, note the following:
• The Ethernet transmitter client clock domain must always be connected to the
tx_clk input of the Ethernet AVB Endpoint core. Additionally, the transmitter clock
enable, as used with the EMAC, must always be connected to the tx_clk_en input
of the Ethernet AVB Endpoint core.
• The Ethernet receiver client clock domain must always be connected to the rx_clk
input of the Ethernet AVB Endpoint core. Additionally, the receiver clock enable, as
used with the EMAC, must always be connected to the rx_clk_en input of the
Ethernet AVB Endpoint core.
• The host_clk input of the Ethernet AVB Endpoint and the HOSTCLK input the
EMAC must always share the same clock source.
Connections Including Ethernet Statistics
X-Ref Target - Figure 12-4
Figure 12-4: Connection to the Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC and Ethernet Statistic
Core
tx_clk
tx_clk_en
tx_data[7:0]
tx_data_valid
tx_underrun
tx_ack
rx_clk
rx_clk_en
rx_data[7:0]
rx_data_valid
host_opcode[1:0]
host_addr[9:0]
host_wr_data[31:0]
host_req
host_miim_sel
host_miim_rdy
host_rd_data_mac[31:0]
hos_rd_data_stats[31:0]
host_clk
CLIENTEMAC0PAUSEREQ
CLIENTEMAC0PAUSEVAL[15:0]
TX_CLK_0
TX_CLIENT_CLK_ENABLE_0
CLIENTEMAC0TXD[7:0]
CLIENTEMAC0TXDVLD
CLIENTEMAC0TXUNDERRUN
EMAC0CLIENTTXACK
EMAC0CLIENTTXCOLLISION
EMAC0CLIENTTXRETRANSMIT
CLIENTEMAC0IFGDELAY
GMII_RX_CLK0
RX_CLIENT_CLK_ENABLE_0
EMAC0CLIENTRXD[7:0]
EMAC0CLIENTRXDVLD
EMAC0CLIENTRXGOODFRAME
EMAC0CLIENTRXBADFRAME
HOSTOPCODE[1:0]
HOSTADDR[9:0]
HOSTWRDATA[31:0]
HOSTREQ
HOSTMIIMSEL
HOSTMIIMRDY
HOSTCLK
HOSTEMAC1SEL
EMAC0CLIENTTXSTATS
EMAC0CLIENTTXSTATSVLD
EMAC0CLIENTTXSTATSBYTEVLD
EMAC0CLIENTRXSTATS[6:0]
EMAC0CLIENTRXSTATSVLD
EMAC0CLIENTRXSTATSBYTEVLD
host_clk
GND
GND
NC
NC
GND
host_opcode[1:0]
host_addr[9:0]
host_req
host_miim_sel
host_miim_rdy
host_rd_data[31:0]
host_stats_lsw_rdy
host_stats_msw_rdy
host_clk
txclientclkin
clienttxstats
clienttxstatsvld
clienttxstatsbytevalid
rxclientclkin
clientrxstats[6:0]
clientrxstatsvld
clientrxstatsbyteva
lid
clientrxdvld
host_stats_lsw_rdy
host_stats_msw_rdy
rx_frame_good
rx_frame_bad
Ethernet Statistics Block-level Wrapper
(from Ethernet Statistics Example Design)
Block-level Wrapper
(from Virtex-5 Embedded Tri-mode
Ethernet MAC Wrapper)
Ethernet AVB Endpoint
Core Netlist
HOSTRDDATA[31:0]