On Sat, Jan 01, 2011 at 08:55:05AM -0500, Olin Lathrop wrote: > Usually PGC and PGD have to be held just right while MCLR is blipped just > right before the key can be clocked in. Vdd might also require special > handling. Check the spec and make sure your code does that. The spec for the 16F193X is significantly different than the 18J series which I took the time to look up. I have a preliminary version of the programming specification for the 16F193X parts. Let me get the latest copy and double check... Done. It's still the same as the spec I have. BAJ --=20 Byron A. Jeff Department Chair: IT/CS/CNET College of Information and Mathematical Sciences Clayton State University http://cims.clayton.edu/bjeff --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .