4.2 PWM Mode Timer Resource

PWM mode makes use of the even numbered 8-bit timers (Timer2, Timer4, etc.) to specify the PWM period. For correct PWM operation, Timer2 must use the instruction clock (F_OSC/4) as its clock source. To achieve 10-bit PWM resolution while using an 8-bit timer as the time base, module hardware combines the 8-bit timer with two additional bits that are either generated by the system clock (F_OSC) or copied from an internal prescaler, creating a 10-bit time base.