11.4.11.2.1 Clock Selection

The IOIMCON.EXTCLK bit determines the clock source that operates the timebase and other module logic.

When EXTCLK = 0, the module timebase and logic are clocked from the system instruction cycle clock, T_CY.

The external clock selection is dependent on the device definition. The external clock source may or may not be synchronous to the Peripheral Clock domain. Synchronization logic is required between the SFR register space (Peripheral Clock domain) and the module logic (IO Monitor Clock domain) to allow the module to operate from high speed asynchronous clock sources.