18f2550 USB OSC Problem


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  1. #4
    Join Date
    Oct 2008
    Posts
    14

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    Thanks for help.. But I only use c18 for bootload hex. I'm using PBP with microcode studio for my software...
    I didn't change lines.. PDFSUSB works fine.. I'm using 20 MHZ Crystal with 15pf capacitor...
    I wrote DEFINE OSC 48 but it's faster.. It causes also problems on serial comm with another PICs...
    I think config bits are normal...
    #pragma config PLLDIV = 5 // (20 MHz input)
    #pragma config CPUDIV = OSC1_PLL2
    #pragma config USBDIV = 2 // Clock source from 96MHz PLL/2
    #pragma config FOSC = HSPLL_HS
    Last edited by serkanc; - 28th October 2008 at 21:34.

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