Supply NetSet Properties Prefix Registration

Registration of supply net properties includes identifying and registering of supply nets by using the property name prefix for inherited connections that have been specified in the Supply NetSet Properties Prefix section on the Supply Nets tab of the Power Manager Setup form.

For non-Liberty cells, the supply name can also be derived from the prefix of the property name used in the net expression for supply net connectivity. Power Manager creates property names for net expressions with a specific prefix as specified in the setup. Prefix matching helps to identify the power/ground type for lower level cells when the tool creates redirected netSets for resolving supply net connectivity to the top level supplies.

For power/ground type, precedence is given to supply net names that are already registered in the setup. Else, the property prefix name is used. The prefix name is registered in the setup for different supply types such as follows:

powerNetPropPrefix - vdd

groundNetPropPrefix - vss

pwellNetPropPrefix - hSup_sub

nwellNetPropPrefix - lSup_sub

deeppwellNetPropPrefix - hSup_sub2

deepnwellNetPropPrefix - lSup_sub2

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