Note that *async* serial communication uses the start and stop bits to re-sync on *each* transfered byte. That's why the start and stop bits are there at all. (*Sync* serial communication is another thing...) Jan-Erik Svderholm. >I have used sleep and wake up with rb0 before. I am just wondering do I >loose the first byte or do I loose the first couple of bits of the whole >data so that its corrupted > >-- Jan-Erik Svderholm S:t Anna Data tel : +46 121 42161 mob : +46 70 5241690 -- 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