Hi Turkuaz,

I made a similar move two years ago. You are going to need datasheets on both devices and compare the area that covers analog registers and the comparator. I think but I'm not quite sure, but the problem lies within the configuration for these areas. Someone else will probably comment on this later today. If I get a chance tonight I'll take a look at them. But you should still get the datasheets from www.microchip.com and start comparing them.

HTH,

BobK