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Altera_Forum
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17 years ago

Reset Query

Hi, I am having two separate clocks in my module (Clock domain1 : 100 Mhz) and Clock domain 2 is 270 Mhz. Do i need separate resets in my IO for resetting logic in these separate c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

As I have eplained before, it depends on how much the transient data is important for your design. If you can accept a transient with incorrect data then solution 1 is OK, there is no need to use separate resets if your design is equipped with cross-domain control signals which guarantee steady-state synchronization (enables, sync-pitches, etc.).

If, otherwise, you cannot accept "false" transient data the solution 2 will guarantee data integrity from the first data soon after the reset because of the synchronous deassertion to the slow domain.