In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: If you want trouble-free serial communication, I would recommend using an external resonator. If you were using a slower baud rate (say 1200 baud), you MIGHT get away with the internal 4MHz with IRC_CAL IRC4MHZ. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=155619#m155857 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)