In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: You can run the SX at 4MHz, 1MHz, 128Khz or 32KHz. But the speed is not very stable, so you cannot use the internal osc for timing critial (serial) applications. I think it's about +/- 8%. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=125236#m125275 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)