Propagating Parameters in IP Integrator - 2022.2 English

Vivado Design Suite User Guide: Designing IP Subsystems Using IP Integrator (UG994)

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2022.2 English

Parameter propagation is one of the most powerful features available in IP integrator. The feature enables an IP to auto-update its parameterization based on how it is connected in the design. IP can be packaged with specific propagation rules, and IP integrator will run these rules as the diagram is generated.

For example, in the following figure, IP0 has a 64-bit wide data bus. IP1 is then added and connected, as is IP2.

Figure 1. Parameter Propagation Concept

In this case, IP2 has a default data bus width of 32 bits.

When you run the parameter propagation rules, you are alerted to the fact that IP2 has a different bus width. Assuming that the data bus width of IP2 can be changed through a change of parameter, IP integrator can automatically update IP2.

If the IP cannot be updated to match properties based on its connection, an error displays, alerting you of potential issues in the design. This simple example demonstrates the power of parameter propagation. The types of errors that can be corrected or identified by parameter propagation are often errors not found until simulation.