Quartus® Prime Pro Edition User Guide: Platform Designer

ID 683609
Date 7/08/2024
Public

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5.5. Clock Interfaces

Clock interfaces define the clocks used by a component. Components can have clock inputs, clock outputs, or both. To update the clock frequency of the component, use the Parameters tab for the clock source.

The Clock Source parameters allows you to set the following options:

  • Clock frequency—the frequency of the output clock from this clock source.
  • Clock frequency is known— when turned on, the clock frequency is known. When turned off, the frequency is set from outside the system. Turning off this option is useful for cases when a subsystem receives a clock from a higher level system.
    Note: If turned off, system generation may fail because the components do not receive the necessary clock information. For best results, turn this option on before system generation.

For more information about synchronous design practices, refer to Quartus Prime Pro Edition User Guide: Design Recommendations.