In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: John, The internal 4MHz clock is not accurate enough for serial communications. It's something like +/- 8%. Change OSC4MHZ to OSCXT1 and use the SX-Key or a 4MHz resonator for a clock source. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=148657#m148660 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)