> What is the lowest frequency you can get using the PWM module (on say an > 16F877 with 4MHz xtal)? From looking at the docs it seems to me it is > 1000000/16/256 which is approx 244Hz. Is this correct I think so. I get the same answer. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.