Demote global net to regular net

• Families supported

• Purpose

• Tools / How to enter

Families Supported

The following table shows which families support this constraint and which tools you can use to enter or modify it:

Purpose

Use this constraint either to free up a dedicated clock routing resource by demoting a global net to a regular net or to prevent a clock net from automatically being promoted to a global net.

If there are multiple clocks in a design and not enough clock routing resources, you can demote a global net to a regular net for a clock that does not drive logic through the critical path in a design.

Tools /How to Enter

You can use one or more of the following commands or GUI tools to demote a clock net to a regular net:

• PDC - unassign_global_clock

• GCF - set_noglobal

• Compile Options - -demote_globals <value>

See Also

Constraint entry

Netlist optimization constraints

unassign_global_clock (PDC)

set_noglobal (GCF)

Setting Compile Options, -demote_globals <value>