I'm wondering if there is some well known issue with the 16F872 WRT using the RC oscillator mode. I was told that the 'F872 was a pin-compatible replacement for the 'C62B (ignoring the A/D). When the 'C62B is in the socket I get a nice clock out signal on pin 10, CLKOUT. Quickly swapping in the 'F872 I get a DC low-level and pin 9, CLKIN is a DC high-level. Anyone?
Thanks.