Hi gang, I have a PIC16LF73 that runs fine using a 10MHz crystal, but won't run using an external clock. Is there something in the code (such as a register bit) or in the programming that must be done to get it to clock externally? Thanks! Bob -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist