On Tue, 20 Jun 1995 16:30:01 +0100 (BST), Simon Cooke said: > I'd expect it to be more a case of the signal getting damped somewhere > than being at the wrong freq -- IIRC, the xtal /should/ be 4.43MHz.
Yes but suppose the chip _were_ to require 8.86 instead of 4.43 (so that it can divide it. Don't ask me why, but that's what my data says). Then the circuit would probably still work, with the xtal resonating at its first harmonic instead of its fundamental frequency, but it would be rather more unstable than with an 8.86 MHz crystal. [My data is for the MC1377P, whereas the thing in the Sam says MC13077P, so there may be a difference. The circuits look pretty similar though.] But there may still be a much simpler explanation, if only someone can provide it. imc
