Besides on the potential I/O conflicts, there is also the issue with Vpp-before-Vdd. I know that the mentioned 12F's have this "problem", don't know about the 16F914. Some other chips seems to not be affected by this, 16F688 and/or F88, if I'm not wrong... This is generaly a problem with ICSP where the programmer can't control Vdd. Anyway, probably better check it up. Regards, Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist