Please check the feedback from AE team:
We need to remember that the "Bus interface clock" (BUS_CLK in this case) is the one used to feed all the logic for LPIT, in this particular example, I see that the configuration of its registers is done successfully (using the BUS_CLK), and then, the timer starts working with its functional clock (FIRCDIV2, asynchronously).
That's why apparently there is no problem. Where problems could arise is when writing/reading the LPIT regs, later in the application.
In a nutshell, they went out of the spec, but as they kept using only the functional clock, they didn't see any issues.
Best Regards,
Robin
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