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 Driving an Allegro Board design with Capture Net attributes for delay tuning etc 

Last post Mon, Mar 4 2013 8:31 AM by WaltP. 3 replies.
Started by ScottCad 03 Mar 2013 11:38 AM. Topic has 3 replies and 872 views
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  • Sun, Mar 3 2013 11:38 AM

    • ScottCad
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    • Joined on Sat, May 26 2012
    • Roswell, GA
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    Driving an Allegro Board design with Capture Net attributes for delay tuning etc Reply

    Hi, in 16.5 is there a way to apply net attributes to a capture net and then have Allegro use that information.

    What I am trying to do is in capture give certain nets a max and min length so that when the netlest is generated the info will be passed to Allegro.

    Actually I would like to be able to specify a few more things like the width of the net, Min spacing between 2 nets etc ... stuff like that so the engineers can enter the info at the sechmatic level.

    I looked at the net properties spreadsheet in capture and filtered it by cadence allegro but I dont see any attributes that pertain to setting min, max length of the net etc.

    Not too sure if it is possible to do this or not ?, It looks like there is a way to add additional attribute fields in Capture so perhaps this might be a method to get the attributes in ?, wonder what attributes to use ?

    Thanks Scott.

    • Post Points: 20
  • Mon, Mar 4 2013 6:54 AM

    • Ejlersen
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    • Aalborg, Copenhagen
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    Re: Driving an Allegro Board design with Capture Net attributes for delay tuning etc Reply

    Hi

    You can set min/max length and match lenght in property editor.

    You need to select Flat Nets and then locate the row/column named propagation_delay and right click - invoke UI

    similarly you can do the same for relative_propagation_delay

    Best regards

    Ole

    Best regards Ole
    • Post Points: 35
  • Mon, Mar 4 2013 8:10 AM

    • ScottCad
    • Top 50 Contributor
    • Joined on Sat, May 26 2012
    • Roswell, GA
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    Re: Driving an Allegro Board design with Capture Net attributes for delay tuning etc Reply
    • Post Points: 5
  • Mon, Mar 4 2013 8:31 AM

    • WaltP
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    • Joined on Mon, Jan 19 2009
    • Rochester, NY
    • Posts 5
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    Re: Driving an Allegro Board design with Capture Net attributes for delay tuning etc Reply
    The default properties listed in Capture are not all inclusive. Additional properties can be added and passed to Allegro and OrCAD PCB Designer.

    Some of these properties are:

    MIN_LINE_WIDTH

    MIN_NECK_WIDTH

    TOTAL_ETCH_LENGTH

    NET_SPACING_TYPE

    NET_PHYSICAL_TYPE

    The level of Allegro and PCB Designer also has to be taken into account. Not all properties are supported by all levels.

    Also, try MakeCAP a third party tool which is a much easier way of passing properties.

    http://www.ema-eda.com/Products/MoreProducts/MakeCAP.aspx

    Your Cadence Channel Partner should be able to provide additional details

    WaltP - EMA
    • Post Points: 5
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Started by ScottCad at 03 Mar 2013 11:38 AM. Topic has 3 replies.