Bhawandeep Singh Harsh
05/24/2021, 11:16 PMManar Abdelatty
05/25/2021, 1:52 PMUSE_POWER_PINS
is used to guard the power pins. If you are running the full chip simulation, you will need to define it (this is why it is included in the uprj_netlists). Also, it is used by openlane to know the power connection through the SYNTH_USE_PG_PINS_DEFINES
variable https://github.com/efabless/caravel-lite/blob/main/openlane/user_project_wrapper_empty/fixed_wrapper_cfgs.tcl#L60. You can aslo read more about the power grid from here https://github.com/efabless/openlane/blob/master/docs/source/advanced_power_grid_control.md