Hello Why do you have the NOPs? Just an idea, but try disabling PWM completely while you toggle the outputs. On 5/2/07, Nigel Duckworth wrote: > > Hi, > > Does anyone have experience with the Power Control PWM module on the > 18F4331 or it's siblings? > > I have a glitch on the start of the PWM pulse train after switching from > one half-cycle to the next using the Output Override bits (independent > mode). > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist