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Power Analysis Warnings

susman

Dear All,

I am running power analysis uing Innovus and getting following warnings during the run:

** WARN:  (VOLTUS_POWR-2047): The following cell(s) power_level cannot be mapped. Check if the connections of the power/ground pin to the external rails have been specified. The power will be distributed to the default rail.

 

POWER LEVEL         CELL                              INSTANCE

CORE_VOLTAGE        PDIDGZ                            Pad_clk

IO_VOLTAGE          PDO02CDG                          Pad_dc

 

** WARN:  (VOLTUS_POWR-2041): There are some instances in the design which are not connected to any power or ground nets.

These instances will be added to default power/ground rail uti files.

Use 'itaputil list <uti-file>' command to get the list of instances.

The cells reported in the warnings are IO cells which I've instantiated in my netlist and no warning appears during sroute before the power analysis. Could anyone please help me in resolving these warnings?

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