On Tue, 1 Feb 2000 19:09:40 -0000, andy howard wrote: > >Hmmm, I have an 877 sitting here running perfectly happy with no >external xtal or resonator. >Now I know what that smell of sulphur is. > There must at *least* be an external capacitor and resistor for the RC clock to work... (well, maybe some *stray* capacitance in a sloppy layout would do the trick ) AFAIK, Only the 12C series and 16F62X sereies have a *completely* internal RC oscillator, thus freeing up the OSC1 and OSC2 pins for other uses... Hmmmmmm Dan