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Length equalization

Hi everybody, Is there an easy way of equalizing the length of the selected Clines? e.g You have a 16 bit data bus and you want to equalize the lengths to 2000 mil (pin to pin) Thank you.

Originally posted in cdnusers.org by AhmetOzsoy

archive over 17 years ago

You could try using constraint manager!

Originally posted in cdnusers.org by Kalevi2
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archive over 17 years ago

Hello, Please explain. How can i do it using constraint manager? Or Is there any other way? Hope, someone explain it.

Thanks.

Originally posted in cdnusers.org by shiva
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archive over 17 years ago

In the constraint manager, on the relative propagation delay tab, select the nets you want to include in the length matching, and create a match group. In the Pin Delay column, for this group, select longest pin pair. under Relative Delay, Delta:Tolerance, switch from ns to mil. In the Delta:Tolerance box for the nets in your group, type 0:2000. Your group is now set to match within two inches, and a DRC error will be generated for any nets outside this window. Be aware, the tolerance is + or - from the target. Allegro will select one of the nets to be the target, but you can override this by typing target in the Delta:Tolerance column of your selected net. You will then have to set the delta and tolerance for the net selected by Allegro.
Regards,
Harold

Originally posted in cdnusers.org by Hpattie
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archive over 17 years ago

I didn't find the propagation delay tab. Presentily we are using the PCB editor studio version 16.0. Is it available only in performance version?

Thanks.

Originally posted in cdnusers.org by shiva
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archive over 17 years ago

The relative propagation tab is on the left side in the Net folder under Routing.
Regards,
Harold
harold.pattie@ericsson.com

Originally posted in cdnusers.org by Hpattie
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