2.1.4 CCC Dynamic Configuration

Enable Dynamic configuration —When the Enable Dynamic configuration option is selected, an APB target interface is exposed to the FPGA fabric. There is one APB target interface per corner of the fabric, and thus the two CCCs in a given corner share the same dynamic configuration APB interface. This interface can be used to read or modify the CCC configuration registers from the FPGA fabric. Refer to the UG0586: RTG4 FPGA Clocking Resources User Guide for the list of CCC Configuration registers.

You can choose to have Dynamic configuration for both CCCs. The Dynamic changes cannot alter any parameter that could result in loss of lock.

Important:
  • It is recommended to configure CCC’s in dynamic configuration only when locks of the CCC’s are high.
  • When user performs dynamic configuration its user responsibility to not change the PLL registers as changing these registers will cause Loss of LOCK and which causes recalibration process to trigger again and user written PLL registers will be lost.