>> What specifically don't you understand on this page? While it's PROBABLY true, I don't think it's completely obvious that the maximum bit rate supported by the uart is dependendent ONLY on the clockrate of the PIC. Most stand-alone external uarts have a much lower maximum bitrate than would be implied by the limits of current chip technology. BillW -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.