27.4.1 Time Base Generator
The Time Base Generator (TBG) provides a time base for the rest of the module using clock signals available on the microcontroller. This serves not only as the time base for the Timer modes, but also allows Input Capture and Output Compare pre-modes to operate without depending on another on-chip timer module.
Up to eight clock inputs are available to the clock generator, including the system clock (TCY) and other on-chip oscillator sources. Depending on the device, external clock inputs may also be available. A prescaler divides the selected clock source to a suitable frequency for use by the module.
The TBG has the ability to synchronize its operation with the selected clock source, subject to input timing restrictions or the module’s operating conditions. Setting the TMRSYNC bit (CCPxCON1[11]) enables synchronization of the time base with the clock input.
The TBG is shown in Figure 27-2.