PIC24HJ64GP502

Anpassung des internen Oszillators auf exakt 8MHz (4MHz Istructioncycle) durch Register OSCTUNE

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OSCTUN = 15; //   16 = 255ns Tinstr 
             //   15 = 250ns Tinstr = 4MHz

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Testroutine in main()

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while(1)

   {             
     asm("bset, LATB #14");
     asm("bclr, LATB #14");
     asm("bset, LATB #14");
     asm("bclr, LATB #14");
   }

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ergibt in Assembler:

<syntaxhighlight lang="MPASM" line start="100" enclose="div"> 773: while(1) 774: { 775: asm("bset, LATB #14"); 000882 A8C2CD BSET 0x2CD, #6 776: asm("bclr, LATB #14"); 000884 A9C2CD BCLR 0x2CD, #6 777: asm("bset, LATB #14"); 000886 A8C2CD BSET 0x2CD, #6 778: asm("bclr, LATB #14"); 000888 A9C2CD BCLR 0x2CD, #6 779: } 00088A 37FFFB BRA 0x882 </syntaxhighlight >

bei korrekter 4MHz Instructiontakt