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Altera_Forum
Honored Contributor
8 years agohold time violation using MAX V
Hi, I saw some hold time violation when I trying to run the STA. I believe the problem is because the source and destination FFs of this path are on different clock domains, and the tool thin...
Altera_Forum
Honored Contributor
8 years ago --- Quote Start --- If the clock domains are asynchronous (no frequency or phase relationship) you need a false path timing exception in your .sdc file (set_false_path or set_clock_groups). If the domains are synchronous to each other, you need a multicycle timing exception. --- Quote End --- The suggestion sounds ambiguous to me. You'll first determine how data can be consistently transferred between both clock domains and design the logic respectively. Then specify appropriate clock constraints. The suggested constraints might fit under circumstances.