20.3.5 Specify Clock and Data Frequencies in SmartPower

To specify a clock and data frequency:

1. Click the Domains tab
2. select the Clock/Data frequency cell and type in a new value

SmartPower defaults to 0 MHz for the clock frequency. Import your clock frequency from SmartTime by using the Initialize Frequencies dialog box in SmartPower or input your target for each clock frequency in the Domains tab. You must also specify a data frequency (5% of your clock frequency is a typical guideline for your data frequency – this corresponds to a toggle rate of 10 %.)

Not all the pins/gates/nets of your design are associated with a specific clock. For example, the frequency of a design input port is not always correlated to a clock frequency. By extension, all pins that are upstream of the first level of sequential elements are not associated with any clock. SmartPower creates an InputSet by default that it uses to group all the pins that are controlled by design inputs (instead of sequential elements). You may wish to view and verify the InputSet to further evaluate your design.