In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote: If you're powering the SX with 5v then making the inputs CMOS sets the threshold to 2.5 volts -- your signal may not be getting there. Change your inputs to TTL (1.4v) and you shouldn't have any more troubles. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=272878#m272879 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)