ok thank you, osc 48 works, but where does it say to write this when using a 20Mhz crystal ?
K
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Re: XTAl using 18F4550
ok thank you, osc 48 works, but where does it say to write this when using a 20Mhz crystal ?
K
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Re: XTAl using 18F4550
It says it in the default configuration bits (18F4550.inc) when compared to the oscillator structure on those USB chips.
The only way to understand why, is to read (study) the datasheets Oscillator Configurations section.
The oscillators in the USB chips are very different from any of the other PIC families.
http://ww1.microchip.com/downloads/e...Doc/39632e.pdf
DT
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