Quote Originally Posted by Gixxer View Post
It has an 18f2520 with a 10Mhz smt crystal, according to the docs it is actually running at 40Mhz, I assume that has been accomplished by the provided pre-programmed software.
Most of the 18F's can multiply the crystal frequency X4, using the Phase Locked Loop feature. So you can run at 40mhz with a 10mhz crystal.

The options for using the x4 PLL with the HS oscillator are set in the configs.
This thread explains all that better than I could.

Presetting Configuration Fuses (PIC Defines) into your Program
http://www.picbasic.co.uk/forum/showthread.php?t=543
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