[SOLVED] Why internal power is larger than switching power?

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Kenny0820

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Hi all, the figure below is report_power in PrimeTime PX, I did the simulation with zero delay, so there's no glitch power, but why the internal power is larger than the switching power, is this normal? Or this is caused by the sdc file? I did not set my sdc for this design but it still generate the power report.



Thanks for reading this.
 

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Suggest to review Prime Time PX manual for the definition of internal and switching power. In simple words, internal power is generated by charging and discharging of internal logic cell capacitance and switching power by load capacitance. The observed ratio shows that load capacitance is small compared to internal.
 
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