Reg: PT
for
1) setup analysis the tool takes the "worst case" values frm the .lib
2) hold analysis the tool takes the "best case" values frm the .lib
means to say tht for setup analysis .. , "r" or "f" which ever value is max, will be take for the DATA PATH & min values will be taken for the CLK PATH ....
setup : datapath ( ARRIVAL TIME) -> MAX values
clockpath ( REQUIRED TIME) -> MIN values
FOR SETUP ANAYSIS, this is the reason, tht u find "arrival section" the tool always takes the WC values and for the " required section" takes the BC values !!!
PS:
IN PT, BY DEFAULT IF UR GIVE THE COMMAND "REPORT TIMNG", THE TOOL ALWAYS GIVES THE REPORT FOR THE SETUP ANALYSIS !!!
WBR,
Lakshman