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

Hi,

After interchange the clock between die_ready_Z and sync1_in_Z, sync2_in (screenshots)

The remaining CDC-50001 warnings are cleared.

Based on CDC-50001 descriptions:

If you do not intend a violating transfer to be asynchronous, ensure that the launch clock of the transfer is correct and is related to the latch clock of the transfer

Thanks,

Regards,

Sheng