Hello!
I am running NCX tool making 0.18um 5V digital standard cells .lib file.
When I writing the .indices file that needed when running the tool. Some index values must be setup before running:
ncx_input_net_transition_index : 0.03, 0.1, 0.4, 0.9, 1.5, 2.2, 3 ;
ncx_input_transition_time_index : 0.03, 0.1, 0.4, 0.9, 1.5, 2.2, 3 ;
ncx_total_output_net_capacitance_index : 0.00035, 0.0035, 0.021, 0.0385, 0.084, 0.147, 0.231 ;
ncx_constrained_pin_transition_index : 0.03, 2.2, 3 ;
ncx_related_pin_transition_index : 0.03, 1.5, 2.2 ;
I use the index values I get from 0.18um 1.8V .lib file first, but get many negative values in the generated .lib file.
So I want ask how to setup these index values based on the 5V process?
Thanks!