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Altera_Forum
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15 years ago

Timequest User Guide and Source-Synchronous Outputs

Hello All, A few days ago I stumbled on the TimeQuest User Guide written by Rysc, it is quite a page turner! Very well written. I had a few questions about I/O Timing in the getting start...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Yikes. Good catch. I don't have any examples of source synchronous, and that description is wrong. If the clock were sent off chip from a PLL, then a generated clock should be applied to the output port sending the clock. I will fix that.

I think the two things I want to add near-term are:

1) A longer discussion on general I/O constraints, with examples.

2) A section on source synchronous, with examples.

Just hard to find the time. But I will try to change this and upload it shortly, since it is incorrect, and that's the whole benefit of a wiki. Thanks for pointing it out.