Equipotential

Nets at a Pin

In Capital Logic Designer, you can connect several nets to a single device pin. When Capital Systems Integrator synthesizes wiring, it treats each of these nets as a different signal and creates a multiterm at the appropriate connector cavity. This is ideal for the case where you can connect a pin to different signals depending on the vehicle configuration (that is, when the nets are tagged with options). However, in some cases, you may want to treat these nets as a single signal during wiring synthesis. This allows synthesis rules to control the creation of either multiterms or spliced wires for this signal. Although you can achieve this with equivalence sets, you can also define the equivalence of the nets directly within the Capital Logic Designer design. To do this, you set the Equipotential attribute for the pin to which the nets connect.

In Capital Logic Designer, it is possible that several pins with an Equipotential attribute are connected. In Capital Systems Integrator, all connected and equipotential nets are combined into a single signal that uses the name of one of the equipotential nets.

In Capital Systems Integrator, the Design Browser (Design tab) displays the signal and lists all of the nets below it.

In the case of shared pins, the Equipotential attribute is stored on each instance of the pin. This provides a way of varying its value in different designs or different revisions of the same design. It also allows separate groups of nets to be merged resulting in multiple signals on the pin. However, this mechanism means that it is necessary to connect all the shared nets that are to be merged onto the same instance of the device pin. In some cases, this is not desirable. For such cases, you can use the Equipotential Global attribute on a shared pin. This results in all nets connected to any instance of that pin being merged.

When a signal in Capital Systems Integrator includes nets which you have merged using more than one mechanism, the signal name is determined using the following precedence (that is, 1 overrides 2 and 3, and 2 overrides 3):

1. Equivalence Set name (if there is one)

2. Global Equipotential attribute value (if there is one)

3. Equipotential attribute value (if there is one)

• Comparison of Use of Equipotential Attribute, Equipotential Global Attribute and Equivalence Sets

• Setting the Equipotential Attribute for a Pin

• Setting the Equipotential Global Attribute for a Shared Pin

Parent Topic:

Editing Slots

Capital Systems Integrator User Guide, 2512.2606

Unpublished work. © 2026 Siemens