Thread: PIC 14 Karen
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Old 10th May 2020, 3:39 pm   #2
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,471
Default Re: PIC 14 Karen

I have a question about the PIC14: As far as I remember, the PIC14 executes code at full speed from RAM, and at half speed from ROM.

The PIC18F452, 100% pin compatible with the 16F877, can use a 'PLL Mode' clock where the device can multiply a 10MHz clock 4 times to give an effective 40MHz clock.

If the PIC14 code was programmed into a PIC18F452 with the clock so configured, then I guess it would run ROM code at full speed and RAM code at double normal speed.

Would it then be possible to alter the PIC code a little to bring RAM code speed back down to normal speed? If so, the PIC14 would then run all code at the original speed, or at least original speed for a 4MHz clock.
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