In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: A stable power supply. A cap between Vss and Vdd (0.1uF). A 10K resistor from MCLR to Vdd. (This is important). Yes, the SX uses the OSC1 and OSC2 pins to be programmed. If you use the internal clock just leave OSC1 and OSC2 alone (except for the programming connections). Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=403892#m403902 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2009 (http://www.dotNetBB.com)