TWF contains timing window & slew data .
Tools find the earliest & latest arrival times for each victim net & aggressor net.The range of switching times from earliest to latest arrival,defines a timing window for victim net & defines another timing timing window for aggressor net.Crosstal effects occur when victim & aggressor windiws overlap.
Hi Asha,
What is the STA tool you are using ?
Refer STA tool manual to write twf from the tool..
say in ETS wrtite_twf will write out twf file. Inputs are spef and libs