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AEsqu's avatar
AEsqu
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6 years ago

Quartus 19.3 does not recognize reset sync blocks

Quartus 19.3 does not recognize reset sync blocks (with double or 3 FF), there is a plague of removal timing violations that are not valid (there are sync blocks). Quartus 13.1 does not have that ...
sstrell's avatar
sstrell
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6 years ago

Are registers in your synchronizer chains being optimized away? Check the RTL Viewer or Technology Map Viewer to verify. Also check the Metastability analysis setting in the Timing Analyzer settings. You probably want it to be set to Auto to preserve these chains of registers. You could also use synthesis attributes to prevent optimizing away the registers if that's what's happening.

#iwork4intel

  • AEsqu's avatar
    AEsqu
    Icon for Contributor rankContributor
    6 years ago

    Hi SStrell,

    The syncro identification is set to auto in both fitter and timing analysis setting, with a length of 2.