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 Length equalization 

Last post Mon, Feb 11 2008 12:13 AM by archive. 7 replies.
Started by archive 11 Feb 2008 12:13 AM. Topic has 7 replies and 1497 views
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  • Mon, Feb 11 2008 12:13 AM

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    Length equalization Reply

    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
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  • Mon, Feb 11 2008 3:46 AM

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    RE: Length equalization Reply

    You could try using constraint manager!


    Originally posted in cdnusers.org by Kalevi2
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  • Mon, Feb 11 2008 3:59 AM

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    RE: Length equalization Reply


    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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  • Mon, Feb 11 2008 3:52 PM

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    RE: Length equalization Reply

    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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  • Tue, Feb 12 2008 12:51 AM

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    RE: Length equalization Reply

    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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  • Thu, Feb 14 2008 9:23 AM

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    RE: Length equalization Reply

    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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  • Fri, Feb 15 2008 5:09 AM

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    RE: Length equalization Reply

    Hi,
    Rules like propagation delay, Diff pairs, match length, area rules are only avalaible in Allegro L w/performance and above.
    You will have to manually control the length. Or you will have to upgrade.
    Regards,
    BillZ
    EMA Design Automation


    Originally posted in cdnusers.org by BillZ_EMA
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  • Tue, Feb 19 2008 1:08 AM

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    RE: Length equalization Reply

    Thankyou for all. Especially for AhmetOzsoy for questioned this topic.


    Originally posted in cdnusers.org by shiva
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Started by archive at 11 Feb 2008 12:13 AM. Topic has 7 replies.