18.3.8 TIMEBASE

Some peripherals have an internal timer that is used to determine the delay between the peripheral being enabled and the indication that it is ready to use.

For the internal timer to function correctly, the Timebase (TIMEBASE) bit field in the Timebase (MCLKCTRL.TIMEBASE) register needs to be configured with how many cycles of the peripheral clock (CLK_PER) are equal to 1 μs. If that number is an integer, subtract one from it and write it to the TIMEBASE bit field. If that number is not an integer, round it down to an integer and write it to the TIMEBASE bit field. For example, if the peripheral clock period is 260 ns, then 3.85 cycles are equal to 1 μs. Since 3.85 is not an integer, it should be rounded down to 3 and then written to the TIMEBASE bit field.