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Sajith_K_Intel's avatar
Sajith_K_Intel
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6 years ago
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How do we set a "keep" or "preserve" attribute to a wire, from QSF or without modifying the code?

How do we set a "keep" or preserve attribute to a wire in my design, from QSF without modifying the code? Quartus 19.4 have PRESERVE_REGISTER setting, but for registers. What I would like to place ...
  • KhaiChein_Y_Intel's avatar
    KhaiChein_Y_Intel
    6 years ago

    Hi,

    Yes. The attribute preserve is supported through HDL only.

    Thanks.

    Best regards,

    KhaiY

KhaiChein_Y_Intel's avatar
KhaiChein_Y_Intel
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi,

May I know if you have any updates?

Thanks.

  • Sajith_K_Intel's avatar
    Sajith_K_Intel
    Icon for New Contributor rankNew Contributor
    6 years ago

    @sstrell​ it did not work as expected. Also since the design is large, there are multiple registers on either side of the node. it is hard to put preserve on those every registers.

    I was wondering why Quartus do not support this feature, while they support it through HDL modification.