LTC6903/LTC6904 1kHz - 68MHz Serial Port Programmable Oscillator. On the link below they show a PIC16F73 controlling its own oscillator frequency. The only external component required for the programmable oscillator is a bypass cap. http://www.linear.com/prod/datasheet.html?datasheet=1067 Tom Deutschman Wizbang Designs, Inc. 1629 W 8TH AVE Spokane, WA 99204 Phone: (509) 251-4814 www.wizbangdesigns.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics