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Syntax of the relative propagation delay using do file

Neha Anu

Hi all,

I'm routing the brd file using the command Route->Route Editor by using the .do files.I want to route some nets for eg: (P0,P2,P3..P7)having relatively same propagation delay.Can Anyone pls reply how to make do file syntax for this relative propagation delay??

Thanx

Neha

  • tltoth

     define (class mg1 P0 P1 P2 P3 P4 P5 P6 P7)

    circuit class mg1 (match_net_length on (ratio_tolerance 20))

     

  • Neha Anu

    Hi,

    I tried to route using this command.But its showing an error bad command match_net_length.

    Thanx

    Neha

  • Neha Anu

    Hi,

    Which will be effective,routing the .brd file with delay constraints command (match group) on do file or setting constraints on the constarint manager and then route??Pls xplain

    Thanx

    Neha

     

  • tltoth

     I would rather you use CM. It is very infomative and makes the 'do' file for you. These "do" files can be found after launching specctra in the project directory. In your case create a Matching Groupin CM and define tolerances.

  • redwire

     What license level do you have?  This is a restricted command IIRC.

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