22.1 Time Base Generator

The Timer Clock Generator (TCG) generates a clock for the module’s internal time base, using one of the clock signals already available on the microcontroller. This is used as the time reference for the module in its three major modes. The internal time base is shown in Figure 22-2.

There are eight inputs available to the clock generator, which are selected using the CLKSEL[2:0] bits (CCPxCON1L[10:8]). Available sources include the FRC, the Secondary Oscillator and the TCLKI External Clock inputs. The system clock is the default source (CLKSEL[2:0] = 000).