In SX Microcontrollers, SX/B Compiler and SX-Key Tool, nate wrote: If going the button matrix route, 4 I/O's can handle 16 inputs, 5 I/O's handle 32, 6 I/O's handle 64.....etc. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=128956#m129117 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)