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Cadence Liberate used for standard cells characterization

fengye

Now, I work on the standard cell characterization with Liberate. But I don't understand the results of switching power and hidden power.

Can someone tell me why the power unit is pJ?

Can someone tell me how the liberate calculates the switching power and hidden power?

By using the power info commands,I get some information,but still don't understand.

* Cell=INVM0R_st Pin=Z RelatedPin=A RelatedPGPin=VDD Type=combinational Direction=rise_transition When= Deck= Vector_space=FR Vector_used=10
- Leakage_state =
- Leakage_value =
- Raw_equation = (((-Q(VDD))*(VDD(VDD)-GND(GND))*0.5-(((Cload(Z)*(_ecsmRailVdd - _ecsmRailGnd))*(_ecsmRailVdd - _ecsmRailGnd)*0.5))))/capacitance_unit

- Eval_equation = (((5.66381e-14)*(0.3-0)*0.5-(((1.52e-15*(0.29999-4.63108e-05))*(0.29999-4.63108e-05)*0.5))))/1e-12
- Value = 0.00842734

Can someone explain the information? 

Parents
  • fengye

    When I set "set_var sim_estimate_duration 0
    set_var sim_duration 4000e-6
    ". The results are different. I still don't understand the time for calculating the energy.

Reply
  • fengye

    When I set "set_var sim_estimate_duration 0
    set_var sim_duration 4000e-6
    ". The results are different. I still don't understand the time for calculating the energy.

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