You might consider using the Numerically Controlled Oscillator (NCO) to achieve this low frequency output.
I have recently been looking at the 16F1503 to achieve a stable 1Hz output.
This device...
The important part is to set the PORT (or LAT) registers BEFORE setting the TRIS registers to outputs.
Otherwise the pins will be in output mode for a period of time but the outputs aren't specified.
Here you will find snippets of working code that will help save you time. Please help add to our collection of examples by contributing code that you have written.
Re: Low frequency Hardware PWM
Thanks Barry.
Ioannis Today, 00:08Never thought of that NCO.
Ioannis