20.3.2 Extracting Power Consumption of a Specific Clock Domain

To calculate the power consumption of a single clock domain (clock tree and data path) in a design:

1. Set SmartPower in toggle-rate mode. This is the default setting. To confirm that SmartPower is in toggle-rate mode, select Preferences from File menu. Select the Use Toggle Rates check box
2. In the Domains tab, set all the Clock Frequencies to zero except for the clock domain for which you are calculating the power consumption.

The total power consumption of this clock domain is displayed in the Summary tab. This includes the contribution of the clock buffer, clock tree, and all clock input of the registers of this specific clock domain.

In case you need to determine the power of the clock tree only, set the toggle rate of data on that clock domain to zero. The total power displayed is the power of that clock tree.