*note: I am resending this because I typed "[PIC]" instead of "[PIC]:" in the subject line on my first attempt. Hello, I'm having trouble getting a 16F627 to start on powerup. I'm trying to use the internal RC oscillator to clock the chip and suspect this may be the trouble. Anyone have experience using this option? Should I just stop being lazy and pick up some ceramic resonators? Perhaps I'm just configuring it incorrectly. Here are the #FUSES options I'm using in my C program (CCSC): INTRC_IO, NOWDT, NOPROTECT, NOBROWNOUT, NOMCLR, NOLVP, PUT I have gotten a chip to start up using these options before, but the same chip will no longer start, nor will other chips programmed as above. thanks in advance for suggestions --Jim Morash jmorash@mit.edu -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics