pin with multiple figs

Discussion in 'Cadence' started by sg, Jul 15, 2010.

  1. sg

    sg Guest

    If we have a pin with multiple figs in a OpenAccess design (virtuoso
    61X), how does router (CCAR or Catena) behave? Should it connect to
    all figs by default or it denpends on some property on pin to decide?
     
    sg, Jul 15, 2010
    #1
  2. sg wrote, on 07/15/10 23:51:
    A pin with multiple figures means that all the figures are "strongly connected".
    So the routers should (I've not checked this) only need to route to one of the
    pin figures, since strongly connected means they are connected inside.
    Potentially it could take advantage of the strong connect to act as a
    feedthrough though.

    Weakly connected pins are represented by multiple pins on the same terminal.

    Must connect pins are presented by separate terminals (with pins on each), with
    an attribute to say that the terminals must be joined. This is sensible, because
    if they are must connect, then this implies that they are separate nets inside
    the cell.

    Regards,

    Andrew.
     
    Andrew Beckett, Jul 16, 2010
    #2
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