(PWM) Pulse-Width Modulation

The PWM module generates a Pulse-Width Modulated signal determined by the duty cycle, period, and resolution that are configured by the following registers:

Important: The corresponding TRIS bit must be cleared to enable the PWM output on the PWMx pin.

Each PWM module can select the timer source that controls the module. Each module has an independent timer selection which can be accessed using the CCPTMRS register. Note that the PWM mode operation is described with respect to TMR2 in the following sections.

Figure 1 shows a simplified block diagram of PWM operation.

Figure 2 shows a typical waveform of the PWM signal.

Figure 1. Simplified PWM Block Diagram
Figure 2. PWM Output

For a step-by-step procedure on how to set up this module for PWM operation, refer to Setup for PWM Operation using PWMx Output Pins.