In SX Microcontrollers, SX/B Compiler and SX-Key Tool, stef wrote: Hi All Dan, I added the 5pFcap to the OSC2 and am now testing for almost 1 hour on the resonator without any problems. Thanks for this advice. Can somebody explain me why this?? Can I assume that I may add a resistor of 10K parallel on osc1 and osc2 and the cap of 5 pF to Osc2 always to my pcb's. It is not hard to do if needed but dous it harm. I 'm now running stable and hope to keep it like that. Guenther Yes I always pull up unused pins. Even the /MCLR. Hope this is not wrong. I hade a electronic teacher that became wild when leaving things open. So it became a habbit. John thanks for the advice. I started with the resonators but if thier is something better I have no problem with swapping to it. The resonator is practical with not mutch needed around it. You are mentioning a external 50MHz ttl oscillator chip. Do you have a perticular partnumber in mand where you have some good experiance with it. (Perhaps with a litle schema or small explanation if needed) I 'm realy interested because my projects are getting more importand. Thanks in advance to all. Stef ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=263075#m263188 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)