Following are the two input clocks.
- Input Reference frequency
- This is the frequency of the clock that is coming from the on-board clock source (REF_CLK).
- Peripheral Reference frequency
- This section lists the clock pins and the input frequencies for
the peripherals where the clock is driven by MIO pins. Figure 1. Input Clocks Configuration
Note: PL_ALT_REF_CLK was shown in past versions of the CIPS IP but is
not supported.