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Altera_Forum's avatar
Altera_Forum
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16 years ago

Timequest GUI

Hi, my question considers the TimeQuest time analysis. Can someone explain me why does the Data Arrival/Required waveline changes after the latch clock ? From what I know it shall change before La...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

From your latch clock, there is a clock delay, pessimisim, uncertainty, etc. that changes when the actual latch clock hits the latching register. That being said, the data does arrive after this, and the slack is negative. So you're right, this is incorrect and it's basically telling you that this path failed timing. It should be in red, and negative slacks mean they failed timing.