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. There can be two reference clocks: REF_CLK and PL_ALT_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