Well...after doing a bunch of searching around I've seen in some cases where a PIC has been employed in both DTMF applications, but then even some of the more seasoned designers have used an external chip to do that.
 
So is DTMF just a real pain to do in a PIC?  Of course its easier to do externally but if you are short on space and cost is a concern...embedding it into the PIC is the obvious choice I think
 
Just looking for comments

		
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