Excluding Power and Ground Nets from Name-Based Registration

Net names with a certain pattern can be detected as a regular expression during the supply nets name-based registration. It can lead to an incorrect registration for the net as a power or ground net, for example, the Monitor and Sense pins used in the design to sense and test the supply signal level during functioning of the design.

To exclude power and ground nets from name-based registration:

1. Use the Names field in the Excluded Nets section on the Supply Nets tab of the Power Manager Setup form to exclude a subset of specific net names. These names are defined in the Regular Expression Based Registration section or defined using the signal type.
2. Use the Regular Expressions field in the Excluded Nets section to specify one or more power or ground regular expressions that have been registered using the Regular Expression Based Registration section or defined using the signal type.
   For example, if the regular expression of power net is VDD, the nets such as VDD, VDDD, AVDD VDD_SUB, VDD_PH, VDD_PHY, VDD_PH1, and so on, are specified as power nets. However, if you want to exclude all nets containing OUTVDDE from being power nets, you can specify OUTVDD to be excluded as a regular expression.
3. Click OK.
   
   

In a setup file, the excluded nets are represented as follows:

;;; Exclude Nets

  excludePG (nil

   names ("VDD_PROBE" "VSS_PROBE")

   regExprs( "vdd.*en vdd.*fb vss.*en vss.*fb" )

  )

Related Topics

Registering Name-Based Supply Nets

Registering Regular Expressions-Based Supply Nets

Registering Libraries

Registering Device and Cell

Performing In-Design Checks

Registering Supply Set and Power Domain

Miscellaneous Settings

Setup File Template

Loading Power Intent Extraction Options from a File

Saving Power Intent Extraction Options to a File

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