Lpc2000

Em Qui 02 Fev 2006 06:05, Jaromir Subcik escreveu:
> According to User Manual, you use lowest possible crystal, but it may
> works. Do you set CCO within recommended range 156 to 320MHz? For desired
> frequency 50MHz you must output divider adjust to 4 to keep this CCO range.

Yes, I am (I think I am).
My PLL routine is like that:

	SCB_PLLCFG = 0x24;
        SCB_PLLCON = 0x01; 
        SCB_PLLFEED = 0xAA; 
        SCB_PLLFEED = 0x55;

	while(!(SCB_PLLSTAT & 0x00000400))

        SCB_PLLCON = 0x03;

        SCB_PLLFEED = 0xAA;
        SCB_PLLFEED = 0x55;

>
> Jarda
>   ----- Original Message -----
>   From: Xtian Xultz
>   To: lpc2000@yahoogroups.com
>   Sent: Wednesday, February 01, 2006 11:27 PM
>   Subject: [lpc2000] Strange problem with PLL
>
>
>   Hello!
>
>   I am working in a LPC2106, using a 10MHz crystal. I configure PLL to work
> at 50MHz. Sometimes the PLL locks, but sometimes dont. I cant see any
> difference between the circuit when it locks and when it does not locks.
>
>   Somebody had problems with PLL? Or maybe I have a malfunctioning chip?
>
> [Non-text portions of this message have been removed]
>
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