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Connecting Power terminals in Orcad Capture

Discussion in 'CAD' started by ShamShoon, Apr 11, 2004.

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  1. ShamShoon

    ShamShoon Guest

    After I laid out my schematic in Orcad capture, I wanted to make global
    Power and Ground nets to pass the schematic to the layout tool. My
    question is, do I have to connect all the power pins to the same net?.
    Some of the components have Vcc as their power and some have Vdd. Do I
    have to explicitly connect them to either Vcc, or Vdd, Or is it
    automatically done by the layout tool when reading the schematic? I'm
    planning to use Layout plus or Allegro for the layout.

    Thanks
     
  2. |> After I laid out my schematic in Orcad capture, I wanted to make global
    |> Power and Ground nets to pass the schematic to the layout tool. My
    |> question is, do I have to connect all the power pins to the same net?.
    |> Some of the components have Vcc as their power and some have Vdd. Do I
    |> have to explicitly connect them to either Vcc, or Vdd, Or is it
    |> automatically done by the layout tool when reading the schematic? I'm
    |> planning to use Layout plus or Allegro for the layout.

    Assuming you don't need to maintain separate power buses (for example:
    for analog and digital sections, or for +5V and +3V, etc.), then just
    add power symbols named "VCC", "VDD", etc. to your power supply
    output. If you need to split the buses, then things get more
    complicated.

    --
    NOTE: to reply, remove all punctuation from email name field

    Ned Forrester 508-289-2226
    Applied Ocean Physics and Engineering Dept.
    Oceanographic Systems Lab http://adcp.whoi.edu/
    Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
     
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