An application note (PDF!) from Microchip on how to use CLC to interface a PIC16F1509 and WS2811 LED driver:
The Configurable Logic Cell (CLC) peripheral in the PIC16F1509 device is a powerful way to create custom interfaces that would otherwise be very difficult. One example is the single-wire PWM signal, used by the WS2811 LEDs, well known in LED video display systems. This application note will provide a simple demonstration of a WS2811 LED Strip driver.