What is the purpose of having this Vref? Why not use the internal 5V reference all the time? If it is for accuracy reasons, then if your 5v line goes wacky... then can you count on the PIC during that time anyway? Thanks, Brandon -- 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