Not knowing this chip but....many of the new ones have the abilities to modify the clock source and frequency. So if by chance you are running slower, is the WDT actually timing out because it isn't being reset like you thought? __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist