Fixed and Unfixed Cells - 2022.2 English

Vivado Design Suite User Guide: Design Analysis and Closure Techniques (UG906)

Document ID

UG906

Release Date

2022-10-19

Version

2022.2 English

Fixed and Unfixed apply to placed cells. They describe the way in which the Vivado tools view placed cells in the design.

For more information about Fixed and Unfixed Cells, refer to this link in the Vivado Design Suite User Guide: Implementation (UG904).

Recommended: After the I/Os are placed, use a hierarchical Pblock floorplan as a starting point for user-controlled placement. Hand placing logic should be used when Pblocks have been found not to work.