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Occurrences reference designator assignment in complex hierarchical design

coronas

Hi all,

consider this AN

when he says:

"Note: As a part will have more than one occurrence in a complex hierarchical design, it is essential that all these occurrences have a unique reference designator in the design. For this, the yellow columns for the parts must have unique reference designator. Therefore, for a complex hierarchical design, the preferred mode of annotation is Occurrence. This ensures that each occurrence gets a unique reference designator."

what  does it means?
when in occurrence annotation mode,
1)sub-circuit reference designators change automatically at each hierarchical block placement/copy action
2)user have to change sub-circuit reference designators at each hierarchical block placement/copy action

I'm asking this because maybe I misunderstand and / or I forgot to set something
if I copy a hierarchical block, the reference designator does not change automatically, and I want that it does.

I had some problems also manually change the reference designator in sub-circuits by double click text to open the display properties dialog, changes made in one occurrence affects other occurrences and other weird things ...
the only way is to change the reference designator manually in property editor view.

i'm using Orcad Capture 16.6-S032.

Thanks

 

 

 

 

 

Parents
  • oldmouldy
    If you understand how the software works, you will appreciate that this behaviour is not "a bug". Complex hierarchy, repeated h-blocks, in Capture has one copy of the schematic, in reality this is the "Instances" (original) version, and "n" sets of properties for that schematic, the "Occurrences" properties, one set of properties for each h-block that references the schematic. When the schematic is copied, to paste "somewhere else", the "Instances" version is actually copied, including the original Instances properties, if any - any other implementation of "copy" would involve determining "which" set of Occurrences properties were to be retained, this wouldn't be impossible to implement but tricky to make fool proof. If another h-block that references the schematic is added, another set of properties are added to the "Occurrences" properties, no copy of the underlying schematic is made. Maybe more control of Annotation would be the way to go.
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  • oldmouldy
    If you understand how the software works, you will appreciate that this behaviour is not "a bug". Complex hierarchy, repeated h-blocks, in Capture has one copy of the schematic, in reality this is the "Instances" (original) version, and "n" sets of properties for that schematic, the "Occurrences" properties, one set of properties for each h-block that references the schematic. When the schematic is copied, to paste "somewhere else", the "Instances" version is actually copied, including the original Instances properties, if any - any other implementation of "copy" would involve determining "which" set of Occurrences properties were to be retained, this wouldn't be impossible to implement but tricky to make fool proof. If another h-block that references the schematic is added, another set of properties are added to the "Occurrences" properties, no copy of the underlying schematic is made. Maybe more control of Annotation would be the way to go.
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