I'm with you on this one. Every time I get a new chip I type in every register name (usually about a hundred), and look at each bit. I generally I wind up configuring all 800 bits, because I don't look at the POR defaults much, I just set them the way I need them. The whole process takes 4-5 hours, and is getting worse with some of the new "J" and "K" series parts. One upside - I learn a lot about the new part.