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Altera_Forum's avatar
Altera_Forum
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14 years ago

Timequest makes timings but not the real stratix IV hardware

I am having problems making actual timings on the real hardware. I'm actually trying to upgrade from a stratix III to a stratix IV. The design works on a stratix III. After I've set up a ba...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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I have identified the precise place where timings are not being met:

I have a barrel shifter that is purely combinatory between two registers. It's quite big with about 70 plus bits in size. Both registers receive the same clock. The clock has made timings according to the analyzer. The question is: Why is the analyzer not properly calculating the delays of this barrel shifter?

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Hi,

dit they use the same clock enable signals ? Can you try to check the timing of the paths

directly in Timequest ?

Kind regards

GPK