Did you set fuse PLLDIV = 6?
PLL expect 4MHz input clock. So you must set correct divider for your crystal oscillator.
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Re: Mouse example is not working in Pic18F2450
Did you set fuse PLLDIV = 6?
PLL expect 4MHz input clock. So you must set correct divider for your crystal oscillator.
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Re: Mouse example is not working in Pic18F2450
It is no trival task to set the clock fuses correctly on an unfamiliar PIC. I suggest that you set your fuses for the required rate, then write a program that flashes a LED at a known rate (eg 1 per sec), then ensure that reality agrees by manuallly timing by conting flashes.
Your enquiry re. low speed piqued my interest. Having never used low speed I did a little googling and came up with some contradictory "answers". See http://www.compuphase.com/electronics/usb_lowspeed.htm and http://www.rosseeld.be/DRO/PIC/18F24..._Usb_Clock.htm
George
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