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Altera_Forum's avatar
Altera_Forum
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11 years ago

TimeQuest Timing Analyzer

First of all, sorry for my poor English, I'm from China. I use the set_net_delay command to specify the delay between a source and destination points. This is the command: "set_net_delay -from...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

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One reason that I could think of is probably the minimum delay achievable by Quartus II is 1.622ns. So, even though you set to 0.5ns, Quartus II cannot achieve your intended delay. You may try to set to a value larger than 1.622ns to see what will be the change just to verify this hypothesis.

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I set the value to 1.7ns, but the delay turn into 1.564ns. Do you have any other ideas?

Thank you.