> 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

I found exactly that a few weeks ago. To get a low range of PWM
frequencies with an 877 I've had to use a variable R on the osc

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.