4.5 PLL/DLL Cascading

The clock routing MUXs in CCCs facilitate the cascading of PLLs and DLLs. There are two possible cascading schemes:

  • PLL to PLL
  • PLL to DLL

The following figure shows the reference and feedback clock connections in a CCC. The CCC configurator must be used for configuring PLL/DLL cascading schemes. The CCC configurator configures the MUXs based on the user inputs provided in the CCC configurator.

Figure 4-20. CCC Block Diagram