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Altera_Forum's avatar
Altera_Forum
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13 years ago

multicycle setup of 2 work, of 4 not!

hi, i did a clock enable like the example given by altera http://www.altera.com/support/examples/timequest/exm-tq-clock-enable.html to run my design at half frequency 50 MHz the clock enabl...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

i changed only the clock enable logic and the multicycle constraints so if a bottleneck is present, it should be more present with multicycle of 2 instead of 4 no?.

the failed path when i use multicycle of 4, is a signal inside the FSM that have the clock enable

the setup relationship from time quest timing analyzer is 10ns for this path and not 40 ns!

this is the operation, from "dividend" to "dividend":

dividend <= (not dividend) + 1;