27.4.6.2.2 Triggered Operation with Asynchronous Clock
The module time base can operate from a variety of clock sources; these may or may not be synchronous to the system clock. In addition, the trigger source may be asynchronous to the module time base clock. To minimize glitches, the incoming trigger signal is latched and synchronized to the module’s time base clock source by default.
When the time base clock source is asynchronous to the system clock, there will be a delay of up to two system clock cycles before the trigger state is reflected in the value of the CCPTRIG status bit.
When the time base clock source is asynchronous to the system clock, there will be a delay of up to two time base clock cycles before a trigger set or clear request from software affects the trigger state of the module.