In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: You need a 10K resistor from MCLR to Vdd. Otherwise the SX will not run or program. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=243374#m243407 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2008 (http://www.dotNetBB.com)