In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: Do you have a 10K resistor from /MCLR to Vdd ? Did you tried a different 50MHz resonator ? Have you tried a different SX48 ? Do you have bypass caps at the SX48 ? Can you post a schematic of your board ? Bean ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=191612#m192697 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)