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OrF's avatar
OrF
Icon for Occasional Contributor rankOccasional Contributor
1 year ago

CDC-50001 - 1-Bit Asynchronous Transfer Not Synchronized

I'm trying to re-open this ticket - I didn't found how , but anyway I tried to change the default Quartus SYNCHRONIZATION_REGISTER_CHAIN_LENGTH 2 (instead of 3) and still get the same warning , ...
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OrF's avatar
OrF
Icon for Occasional Contributor rankOccasional Contributor
1 year ago

Hi,

I’m having trouble understanding what’s wrong with my design. Are you suggesting that Quartus might have a bug?

I’ve already included 2 stages of flip-flops, and the synchronizer macro you added introduces 3 more stages.

So, do I need to synchronize with 5 flip-flops to eliminate the warning? Or is this a bug in the current version of Quartus?

Thanks,