Some components allow to change the timing at run-time by switching among several predefined values or by setting a value from given interval.
For the runtime setting from interval the prescaler value is fixed and the Processor Expert allows to adjust the time using a compare/reload registers. It means that Processor Expert allows to configure the limits of an interval only within a range of one prescaler and it is possible to set values from this interval only. See Dialog for timing settings topic for details.