Hi everyone ,
in my design length match need to do .how to set the constraint for length matching ,which constraint i need to use net or class ?? please help for me
Figure out the longest net length needed in the group. Then use Class rules with High Speed, Min/Max length and maybe tolerance. Be sure on to add a value to Min, otherwise it's possible the Router will ignore tuning them, example if Max is 1500 set Min to 1400.
On the other hand in PADS Router you can select group on nets and move them into Match Length Group section. You want need to know the longest one and let PADS Router feagure it out. It will route the longest one and match the rest of them to the longest.
Thanks for your both reply
but i faced some problem in matching the length.Here i am not choose the matching length box ,the length is matching (green color)
Maximum and minimum length i mention there so it is appear green
if i choose the length is not matching (it is shows in red color)
i mention in pink color matching length that is tolerance
is i need to choose are not
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