SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
As shown in Figure 5-494 the reference clock (FREF) input is used to generate the synthesized clock, but can also be used as the bypass clock for some outputs of the PLL whenever the PLL enters bypass mode. It is mandatory for the PLL clock synthesis.