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Altera_Forum's avatar
Altera_Forum
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16 years ago

Set constraint for timequest

hi. i just start to use timequest. some simple question wondering me and needs confirmation. 1. If use the clock enable method as frequency divider, is necessary to set constraint? 2. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

What you describe is a win-win situation.

But there a number of techniques that can improve timming at the expense of increasing area, ie, register replication.

If you use TimeQuest (I am completly ignorant of the Classical Timming analyzer), you can easily set multi-cycle constraints to all registers that are enabled by a given signal.

Check http://www.altera.com/support/examples/timequest/exm-tq-clock-enable.html for an example.