In SX Microcontrollers, SX/B Compiler and SX-Key Tool, originator99 wrote: Gunther Thanks for the test ideas. The chip will run fine with the 4m resonator on an led test, but will not run on a serial Rx test at baud 9600. The chip runs fine to receive the serial trasmission when using the internal 4mhz. I have tried multiple 4 meg resonators. Sincde the led program works, ad not the serial receive program, I have some other mysterious problem that affects serial receive but not blinking programs. Thanks ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=143298#m143527 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)