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Altera_Forum
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16 years ago

Arria II GX refclk pins

Hi there, Is there any assignment I need to set when I use the refclk pins as clk inputs? I am using EP2AGX65CU17C6 device. We connected a differential clock input to pin M19 and M20, which is ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Hua,

This pin clock is for transceivers. It can't be used with other logic.

I'm using EP2AGX65CU17C6N too. I use this pin clock with a PCI Express core (Reference clock from motherboard).

The block of assignment in Quartus Setting File of my project:

set_instance_assignment -name IO_STANDARD HCSL -to pcie_refclk

set_instance_assignment -name INPUT_TERMINATION OFF -to pcie_refclk

set_location_assignment PIN_M19 -to pcie_refclk