Reply To: Hybrid Scanlines

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@paulb_nl: did you check “Hold summary” on Quartus II reports? In many cases hold violations are more severe as they are in effect even if effective pixel clock is lower than given constraint/maximum. A good guideline is to check that there are no setup violations in fast corner and no hold violations in slow corner(s). Minor violations are still acceptable (and often unavoidable) as gate models always include some pessimism.