Re: Connect module name/placement issue

Just to recap: say we have a design instance hierarchy -


        Top
         |
      Middle
         |
   -------------
   |   |   |   |
  D1  R1  D2  R2


Say modules D1 and D2 have drivers and R1 and R2 receivers on the same
net, so connect modules will be inserted. If the module "middle" routes
power differently to D1 and D2 (e.g. some power gating) then you want
the auto inserted module to pick up Vdd (say) for the D1 D2A  in D1 and
the D2 D2A in D2. The module "middle" may have a signal Vdd coming from
top but will explicitly feed a gated (say) VddD1 to D1.Vdd and VddD2
to D2.Vdd. If the connect modules are instantiated in "middle" then a
hierarchical upward search for "Vdd" will find the feed from top not the
feed to D1 or D2.

It is therefore desirable that the D2As are instantiated on the down
side of the ports they are associated with, otherwise the search
algorithm for hooking up "inherited" signals isn't going to be the same
for regular and connect module instances (if it is going to work correctly).

Kev.



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