set_input_transition in prime time

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honey13

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What is the better way to set input_transition?Is it the way to select a buffer as driving cell on all inputs or explicitly specifying the value by using set_input_transition command. If we want to specify the value how we need to calculate this value.
 

Its better to specify the value using set input transition. Top level designer will give u this.
If u dont have then the second option would be set_driving_cell command.
 

I am working for testchips. We dont have any information about the top level design with which my testchip is going to integrate. Please suggest me what will be the better approach.
 

find one in the tech lib and scale it down somewhat
 

Generally guidelines are defined what should be the output driving cell. Once you know that you can use that cell as the driving cell for your inputs.
 
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