Module-Based Fanout Optimization - 2021.2 English

Vivado Design Suite User Guide: Implementation (UG904)

Document ID
Release Date
2021.2 English

Net drivers with fanout greater than the specified limit, provided as an argument with this option, will be replicated according to the logical hierarchy.

For each hierarchical instance driven by the high-fanout net, if the fanout within the hierarchy is greater than the specified limit, then the net within the hierarchy is driven by a replica of the driver of the high-fanout net.

Important: Each use of logic optimization affects the in-memory design, not the synthesized design that was originally opened.