I used the literal equations from the datasheet, I didn't rearrange them to solve for frequency. I guess and check, sorry :) Lindy Mayfield wrote: > Sorry, but you have PR2 Value (red) as being input, but that is output, no? > > ( I don t have an ossie (yet). ) > > > > >>I've attached it to this email as pic_pwm.xls >>I won't guarantee it's correct, but my oscilloscope seems to >>agree. >> -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.