For several years, one client had need for a 28Mhz PIC (14.31818 x 2 ) for
a video retrace job. I set up a test jig so he could cull the PICs that
couldn't pass muster. After a few weeks he dropped the test. None ever
failed. Thats about 40% overspeed.

--Bob


At 10:42 PM 6/26/2003 -0400, you wrote:
>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
>
>--
>http://www.piclist.com hint: PICList Posts must start with ONE topic:
>[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

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