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Altera_Forum
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15 years ago

Double Data Rate Source Synchronous Constraint

Hi. May i know how to decide to use the same edge captured(center aligned) or opposite edge captured(center aligned) in double data rate source synchronous ? When i perform timing analys...
Altera_Forum's avatar
Altera_Forum
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15 years ago

Use whichever suits your timing closure. Same edge latching needs extra constraints (multicycle) while opposite edge latching does not apart from selecting the right edge combinations.

By adding multicycle to the same edge latching it becomes equivalent to opposite edge case due to wrap-up.