7.2.2 Global Promotion/Demotion Options

These options allow you to set the maximum/minimum values for promotion and demotion of globing routing resources.

• Maximum number of globals that could be demoted to row-globals

  Specifies the maximum number of global nets that could be demoted to row-globals. The default is 16.

• Minimum fanout of global nets that could be demoted to row-globals

  Specifies the minimum fanout of global nets that could be demoted to row-global. The default is 300. If you run out of global routing resources for your design, reduce this number (to allow more globals to be demoted) or select a bigger die for your design.

• Minimum fanout of non-clock nets to be kept on globals

  Specifies the minimum fanout of non-clock (data) nets to be kept on globals (no demotion). The default is 5000. If you run out of globing routing resource for your design, increase this number or select a bigger die for your design.

• Number of global nets

  The number of available global nets for the die is reported in this field. It varies with the die size you have selected for the Libero project.