Avoid Floorplanning and Overconstraining

Avoid Floorplanning and Overconstraining - 2021.2 English

UltraFast Design Methodology Guide for Xilinx FPGAs and SoCs

Document ID

UG949

Release Date

2021-11-19

Version

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.