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 multi‑term at the appropriate connector cavity. This is useful where a pin can be connected to different signals depending on the vehicle configuration (that is, when the nets are tagged with options).

However, you might want to treat these nets as a single signal during wiring synthesis to permit synthesis rules to control the creation of multi‑terms or spliced wires for this signal. Although this can be achieved with equivalence sets, you can also set the Equipotential attribute for the pin to which the nets connect to define the equivalence of the nets directly within the Capital Logic Designer design.

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

In Capital Systems Integrator, the Design Browser Window 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 to enable its value to vary in different designs or different revisions of the same design. It also permits 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 to any instance of that pin being merged.

When a signal in Capital Systems Integrator includes nets which have been 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:

Nets

Capital Logic Designer User Guide, 2512

Unpublished work. © 2025 Siemens