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Honored Contributor
Honored ContributorWhat IO standards should I choose for PCIE signals?
Hello: I am using cyclone IV GX, Should I choose 1.5v PCML for PCI-E data out and PCI-E data in? Should I choose HCSL for PCI-E reference clock in? I can't find any documents about ...
Altera_ForumHonored Contributor
Honored ContributorThis is what I have for a design in the Stratix V, works fine for me (@Gen 1, 2 and 3):
set_instance_assignment -name IO_STANDARD HCSL -to pcie_refclk set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to pcie_perstn set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_rx_0 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_rx_1 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_rx_2 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_rx_3 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_rx_4 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_rx_5 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_rx_6 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_rx_7 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_tx_0 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_tx_1 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_tx_2 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_tx_3 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_tx_4 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_tx_5 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_tx_6 set_instance_assignment -name IO_STANDARD "1.5-V PCML" -to pcie_transciever_tx_7
