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Altera_Forum's avatar
Altera_Forum
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8 years ago

Input Clock Rate Selection

What things should be considered when selecting the input clock rate for FPGAs? Background on this question: Previously I have used a 64MHz clock into CycloneI - IV, Cyclone10 or MAX10. Usua...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

I agree the edge rise time is a big concern, but the frequency also matters. The reflections just cause a little ringing on the slow clock, while they can crash into the next edge on a fast clock.

Thanks for the help.