In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Sparks-R-Fun wrote: John, If you experience the problem when you change ONLY the SX-Key by replacing it with a 4Mhz resonator then I suspect you likely have a resonator related problem. The resonator section of your circuit diagram looks fine to me. What resonator setting are you using in your DEVICE directive? Is it OSC4MHZ or something else? - Sparks ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=181158#m181167 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)