In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: Nick, You need to give the pull-up some time to "kick-in". Put a small delay (a couple uSecs) after the PLP_A = $0 instruction and before you read the pins. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=99039#m99062 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2005 (http://www.dotNetBB.com)