set_driving_cell is use in prelayout or postlayout ?

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mepriyasingh

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set_driving_cell is use in prelayout or postlayout ?
Please expalin in details
Thanks
 

it doesn't matter...... you should use set_driving_cell in prelayout .sdc file and it can be used in the future runs in postlayout runs..... there is no point changing it for prelayout or postlayout
 
set_driving_cell is used to define the Input port transition time, which will be same throughout the PD flow.
 

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