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Altera_Forum's avatar
Altera_Forum
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11 years ago

PCIe Force Gen1 Link

I've built a design around a Stratix V and the Avalon-ST Hard IP Core. The device is designed for Gen3x8 which is working fine. I now want to connect the design to a laptop via a Gen1x1 Express...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

If the pcie core is configured to gen2 and if the laptop also supports gen2, the link will automatically train to gen2, there is no hardware setting such as dip switch to prevent it train above gen2, you still need to regenerate the pcie core to gen1 if want it to operate at gen1.

If the redrivers in the cable only support Gen1, the link will only trains to gen1.