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Altera_Forum's avatar
Altera_Forum
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8 years ago

SignalTap fails timing often

Hello, I have the following problem: When I try to use SignalTap to peek on some of my signals, it often shows values which are not sensible, which is often the result of timing violations betw...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

SignalTap is just like any other logic in your design and follows the same rules. If you sample signals from other clock domains with the 62.5MHz clock then you will get timing violations unless you tell TimeQuest to ignore timing on those paths.

Not sure what you mean by: "The SignalTap nodes are generated automatically, so I would have to look at TimeQuest every time and see whether some new register has popped up in SignalTap by my changes." No signals get added to SignalTap unless you manually add them.