The Activity tab enables you to specify an average clock and data frequency for each clock domain, and also an average frequency for each set of pins. This gives you an initial estimate of the power consumption of your design. However, if this estimate is not accurate enough, you may refine it with a pin-by-pin annotation of the frequency.
To specify a frequency annotation for an individual pin:
Locate the pin in the Activity tab. You may need to select different clock domains from the drop-down menu on the Activity tab, then search in the Not-Annotated Pins list to find the specific pin. You can use filters to facilitate this search.
Select the pin in the
list of Not Annotated pins, enter
a new frequency value, and click the Set
To button. This specifies a new frequency for the selected pin.
The pin with this new frequency appears in the list of Annotated
pins. Repeat these two steps as necessary to annotate the frequency of
several pins.
Note: This annotation procedure enables you to set the frequency of an individual pin, but this does not mean that the pin is removed from its clock domain. A frequency annotation just overrides the domain level frequency.
You may wish to change or remove a frequency annotation of an individual pin. This may be useful when you import a VCD (value change-dump) file or a SAIF (Switching Activity Interchange Format) file.
To change the frequency annotation of an individual pin:
Locate the pin in the Activity tab. You may need to select different clock domains from the drop-down menu on the Activity tab, and then search in the Annotated Pins list to find the specific pin. You can use filters to facilitate the search.
Select the pin in the list of Annotated pins, enter a new frequency value, and click the Set To button. This specifies a new frequency for this pin. The pin appears in the list of annotated pins with this new frequency. Repeat these two steps as necessary to change the frequency annotation of several pins.
To remove the frequency annotation of an individual pin:
Locate the pin in the Activity tab. You may need to select different clock domains from the drop-down menu on the Activity tab, and then search in the Annotated Pins list to find the specific pin. You can use filters to facilitate the search.
Select the pin in the list of Annotated pins and click the Remove button. This removes the specified frequency from the Annotated pin. The pin appears in the list of Not Annotated pins. Repeat these two steps as necessary to remove the frequency annotation of several pins.