Re: PT write SDF file, same Spef file , different uncertainc
we need spef file to back-annotated our netlist,in this way, and we'll get full RC information from layout. PT which is a powerful gate-level STA tool can help us implement the back-annotation process.
For different clocks, we can define different clocks uncertainty.PT groups the different clocks in different clock domains, and the paths in different clock domains will be optimized separately.