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Altera_Forum
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17 years ago

How to constraining clocks in dcfifo

Hi, I've got a dcfifo with read clock and write clock. The write clock is using the coreclkout from the alt2gxb and is clocking in the 64-bit data from the alt2gxb rx output bus into the fifo. ...
Altera_Forum's avatar
Altera_Forum
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17 years ago

Starting with version 8.0, the dcfifo megafunction automatically produces set_false_path exceptions for TimeQuest similar to the cut-path settings it automatically creates for the Classic Timing Analyzer. You should be able to see these exceptions by running "Report SDC" in TimeQuest. In QII 8.0 and 8.1, you shouldn't need to do anything extra to cut cross-domain paths if all the cross-domain paths go through dcfifo.