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How to set a particular layer for a pinpair in a groupset in specctra autorouter??

Neha Anu

Hi all,

I'm using Allegro PCB Router(Specctra) for autorouting the boards.I want to set a particular net in a pinpair to a particular layer?

How is this possible to set in a specctra?Can anyone pls tell me how to set a particular layer for a net in the pinpair which is in a groupset (match group) MG1??

Thanx

Anupama

  • All you have to create a layer ECSets and assign it to the net in the CM, you can autoroute on a particular layer using Allegro PCB Router.

    By the way, you are asking some questions about the autorouter, but it is never all-purpose tool.

    The specctra, a autorouting engine, is less-advanced since early times although Allegro is advanced.
    Particularly, there are problem with delay tune of bus line and diff pair routing in a complex PCB design, such as over 1000+ nets, a lot of DPs, MGs, and layer counts. It will not work if you don't lift some constraints.
    So I use the autorouter for an easy design or as an indication of estimation of total layer counts when floor-planning.

    I believe there is nothing like manual routing for now although I don't really know Global Route.

    Hope this helps.

    Regards,
    Tomo

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