How much current would an external clock driver w/ selectable dividers draw as opposed to a "traditional" high-speed crystal w/ pic/sx in sleep mode when not in use? Is there such a thing as a selectable divider regular crystal? Also I've seen it proposed to switch between low speed RC and high speed crystal; how can one do that? Is'nt that a setting burned at program time? I ----- Original Message ----- From: "M. Adam Davis" > I believe I've seen oscillators with built in selectable dividers, but I cannot > remember where. You can use a seperate oscillator and divider, and use a pic