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Altera_Forum's avatar
Altera_Forum
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15 years ago

why Arria II doesn't support x2 PCIe?

Anyone has any ideas why Arria II doesn't support x2 PCIe? I really like Arria II and want to make a system with multple PCIe cards, but x4 lane PCIe switches are very expensive. Thanks. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

That is just "problem" of the compiler, the PCIe protocol can negotiate any number of active links. You can use x32 device in x1,x2,x4,x8,x16 slots (of course if the slot is ready to accept larger card) and also you can use x1 device in all larger slots, the protocol will handle the link count negotiation.

Just generate the x4 PCIe and use first two links.