1.3 Open-Drain Output Option

When operating in Compare or PWM modes, the output drivers for the CCPx pins can be configured optionally as open-drain outputs by setting the associated Open-Drain Control (ODCONx) register bit. The open-drain feature allows the voltage level on the pin to be pulled to a higher level through an external pull-up resistor, which removes the need for additional level shifters when communicating with external circuits.