Checking Design Hierarchy

Before verifying the power intent for your design, it is recommended that you check the connectivity information in the design hierarchy by choosing Check – Hierarchy. The Check Hierarchy form is displayed. Select the appropriate check options on this form and click OK.

For more details about the check options, refer to Check Hierarchy Form in the Virtuoso Schematic Editor user guide.This check is not run if you remove netSet properties from the design.

Power Intent Check

Power intent can be defined as incomplete in any of the following scenarios:

Incomplete power domains
- Missing power net or ground net
- Power or ground net is an internal net in a macro model
- Missing base domain, when shut-off condition is present
- Specified power or ground nets are not a part of design
Incomplete low power rules
- Incomplete isolation rules
- Incomplete power switch rules
Incomplete low power cells
- Missing power or ground pins
- Missing enable pins, specific for the isolation cells
Missing off conditions
- Missing off condition, when switchable domains are present
Missing power modes
- No power mode
- Missing power mode in which all domains are on
- Missing power mode in which software domains are off
Unmapped ports of the design—All ports of the design must either belong to a power domain, floating ports, or feed-through port list, or the power intent is treated as incomplete
Unmapped supply nets in the design—All supply nets must be a part of some power domain (either as direct Power/Ground net or as equivalent power/ground net), or the power intent is treated as incomplete

Virtuoso Power Manager User Guide
Product Version IC23.1, June 2023