HDL Initial Fan-out Limit logic option

Directs Analysis & Synthesis to issue a warning if a net in the post-elaboration netlist exceeds the specified limit. The post-elaboration netlist is the initial netlist created by elaborating a single entity in your HDL source. It is possible that the later synthesis and fitter optimizations may reduce (or increase) the fan-out of the nets in the netlist. This option is useful for identifying high-fanout signals early in the design process.

This option is ignored if applied to anything other than an entity or an instance of an entity.

Scripting Information


Settings: <fanout limit> -to <entity name>