Detailed Placement - 2021.2 English

Vivado Design Suite User Guide: Implementation (UG904)

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2021.2 English

Detailed placement takes the design from the initial global placement to a fully-placed design, generally starting with the largest structures (which serve as good anchors) down to the smallest. The detail placement process begins by placing large macros such as multi-column URAM, block RAM, and DSP block arrays, followed by LUTRAM array macros, and smaller macros such as user-defined XDC Macros. Logic placement is iterated to optimize wirelength, timing, and congestion. LUT-FF pairs are packed into CLBs with the additional constraints that registers in the CLB must share common control sets.