Forum Discussion

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

Hi,


Could you provide .qar file for taking a look?


Thanks,

Regards,

Sheng


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

    Hi,

    The QAR is attached. The current version I’ve uploaded includes the following constraints:

    set_global_assignment -name SYNCHRONIZATION_REGISTER_CHAIN_LENGTH 2
    set_global_assignment -name SYNCHRONIZER_IDENTIFICATION FORCED

    Feel free to experiment with the other trial and error attributes you’ve suggested.

    Thanks,

    Or.