Does anybody know an easy way to find out what changed between the 16C58A and the 16C58B? The Microchip website does not seem to make such comparisons easy. Douglas Butler (aka Sherpa Doug) Senior Engineer Imetrix Inc. 1235 Route 28A P.O. Box 152 Cataumet, MA 02534-0152 tel. (508) 564-6460 Fax (508) 564-6860 dbutler@imetrix.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.