In SX Microcontrollers, SX/B Compiler and SX-Key Tool, PJ Allen wrote: OK, in your first post your referred to "external crystals [color=red>of]sic[/color]) and in your reply you referred to "either oscillator." Are you using crystals, resonators, or external oscillators? It makes a difference. If you're using an appropriate DEVICE directive (DEVICE SX48, OSC...) then maybe you have a bad board. On the Protoboards, there is a socket for the resonator, X2; the crystal gets plugged into X1/Cx on the Protoboards (the leads get placed into the outside terminals.) ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=305982#m306045 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)