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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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ShengN_altera's avatar
ShengN_altera
Icon for Super Contributor rankSuper Contributor
1 year ago

Hi Or,


Those flip-flop with async clear can't be identified as synchronizer even after enable FORCED IF ASYNCHRONOUS means can't be forced. This is the tool consideration for the functionality. In this case, better avoid the async clear.


Thanks,

Regards,

Sheng