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Altera_Forum
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14 years ago

Stratix IV FF Sync V/s Async Clear

Is there any distinct disadvantage to using the synchronous clear in the Flip/Flops in Stratix IV (like restricted no. per LAB or using more logic or slower timing etc?) versus using the async. c...
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Altera_Forum
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14 years ago

Besides better resource utilization, there are other reasons to use the asynchronous clear (with synchronized release) as the system wide reset.

- it's the only means to achieve defined output states before the clock is running

- built-in resources like PLLs or Altera IP are relying on asynchronous reset