10GBASE-R PHY IP Core Hold Time Violation in Arria V Ethernet MAC Example Design

Description

The 10GBASE-R PHY IP Core has a hold time violation in the Arria V Ethernet MAC example design. This timing violation occurs for the fast model.

Resolution

The workaround is to add the following Synopsys Design Constraint (SDC) to your design:

if { $::TimeQuestInfo(nameofexecutable) == "quartus_fit"} { set_min_delay -to {altera_eth_10g_mac_base_r_av:SUT|altera_eth_10g_mac_base_r_av_eth_10g_design_example_0:eth_10g_design_example_0|altera_xcvr_10gbaser:altera_10gbaser|av_xcvr_10gbaser_nr:av_xcvr_10gbaser_nr_inst|av_xcvr_10gbaser_native:ch[0].av_xcvr_10gbaser_native_inst|alt_10gbaser_pcs:av_10gbaser_soft_pcs_inst|altera_10gbaser_phy_pcs_10g_top:pcs_10g_top_0|altera_10gbaser_phy_pcs_10g:pcs_10g_0|altera_10gbaser_phy_tx_top:tx_top|altera_10gbaser_phy_clockcomp:tx_altera_10gbaser_phy_clockcomp|altera_10gbaser_phy_async_fifo_fpga:altera_10gbaser_phy_async_fifo_fpga|dcfifo:dcfifo_componenet*fifo_ram*} 1.0 set_min_delay -from {altera_eth_10g_mac_base_r_av:SUT|altera_eth_10g_mac_base_r_av_eth_10g_design_example_0:eth_10g_design_example_0|altera_xcvr_10gbaser:altera_10gbaser|av_xcvr_10gbaser_nr:av_xcvr_10gbaser_nr_inst|av_xcvr_10gbaser_native:ch[0].av_xcvr_10gbaser_native_inst|alt_10gbaser_pcs:av_10gbaser_soft_pcs_inst|altera_10gbaser_phy_pcs_10g_top:pcs_10g_top_0|altera_10gbaser_phy_pcs_10g:pcs_10g_0|altera_10gbaser_phy_tx_top:tx_top|altera_10gbaser_phy_clockcomp:tx_altera_10gbaser_phy_clockcomp|altera_10gbaser_phy_async_fifo_fpga:altera_10gbaser_phy_async_fifo_fpga|dcfifo:dcfifo_componenet*fifo_ram*} 1.0 }

You can also use this workaround for the 10GBASE-R PHY IP core by removing the following text from the path of the SDC, “altera_eth_10g_mac_base_r_av.”