Avoid Floorplanning and Overconstraining - 2021.2 English

UltraFast Design Methodology Guide for Xilinx FPGAs and SoCs

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2021.2 English

When using the incremental implementation flow, avoid the following:

  • Do not floorplan incremental implementation runs.

    Pblock placement is overridden by reference checkpoint placement.

  • Do not overconstrain the placer.

    Overconstraining the design in the incremental implementation run can severely impact reuse, because the tools try to meet a target WNS that is artificially altered.