Editing Slots > Equipotential Nets at a Pin

Comparison of Use of Equipotential

Attribute, Equipotential Global Attribute and Equivalence Sets

Use of the Equipotential attribute or equivalence sets provide similar functionality. That is, the ability to merge separate nets into a single signal. This contrasts with combining wires/signals, which does not provide that ability. Combining wires is completely manual and does not have any effect on synthesis. Combining wires is intended for the specific case where a physical implementation of the wiring requires a single wire to implement multiple (exclusive) signals.

You can define equivalence sets only in Capital Project Manager. This means that you can use them to modify the merging of signals even when all the system designs are released and are therefore read-only.

The Equipotential attribute is defined on an instance of a device pin. That means that it is stored within a design and can therefore be revised with that design. In other words, you can have multiple revisions of a system design and the definition of equipotential signals can be different in each.

Use of the Equipotential Global attribute is very similar to the use of the Equipotential attribute. The main difference is that Equipotential requires you to connect all the nets you want to combine to a single instance of a device pin. However, Equipotential Global allows you to combine all nets connected to any instance of the device pin.

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Equipotential Nets at a Pin