get_attribute max_capacitance

[feel_on_on]

hi,

I use command with "get_attribute max_capacitance",but I don't get "max capacitance" in the tech library

I have check tech library ,there is no max_capacitance and max_transition " ,pls tell me how to know "
default max capacitance in the library ,thanks

 

[yadavvlsi]

Maximum transition limit is given in the library. These values are given in library and different for different technologies and may be different for same technology for different foundries. As far I know transition limit, delay table, power etc. all information for standard cells is given in technology library. If any of these are missing, right person to ask about this is one who gave you libraries.

 

[samarah]

hi,
sometimes max_capacitance is defined for the output pin of each library cell.
you can check this value by typing

get_attribute $stdCellsLib/$Cell/$outPin max_capacitance