I was playing around with an 18F452 recently, and all I had at hand was a 50
MHz Xtal oscillator. The PIC seemed to work fine with it -- a crude delay
program also showed that clock speed was indeed around 12.5 MHz. The next
day I switched to a 40 MHz, and the delay increased. The PIC seemed to work
OK at 50 MHz (analog peripherals/SPI/I2C not tested).

Does anybody know how far you can take a PIC beyond the rated clock?
Microchip must surely leave some amount of overhead in there. Purely as an
academic exercise, of course... :-)

Cheers,
Ishaan

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