Re: Problems are about the MPC566's CLOCK

Thanks for your help.I have found the mistake. VDDSYS should have 
connected to 2.6V. This is a careless mistake.





--- In [email protected], "illtll801021" <illtll801021@...> 
wrote:
>
>   Thank you! 
>   The associated clock circuitry as you indicated is the same to 
the 
> MPC566EVB. I did not use the MC33394, this is different to the 
> MPC566EVB in the power, reset and clock circuit.MODCLK is 010.
>   Yestoday, I wrote a simple programe with MPC500_Quick_Start's 
API, 
> to set the SCCR and PLPRCR, then use two variables circularly read 
> the value of these two registers. 
> 
> UWord32 clkReg;
> UWord32 pllReg;
> void main(void)
> {
>    clkReg=0x00000000;
>    pllReg=0x00000000;
>    ioctl( USIU, USIUCLK_WRITE_SYSCLK_CONTROL_REG, 0x81210000L );
>    ioctl(USIU,USIUCLK_WRITE_PLL_LP_RESET_CONTROL_REG,0x00900001L );
>    clkReg = ioctl( USIU, USIUCLK_READ_SYSCLK_CONTROL_REG, NULL );
>    pllReg = ioctl(USIU,USIUCLK_READ_PLL_LP_RESET_CONTROL_REG,NULL);
>    while (1) 
>     {
>      clkReg = ioctl( USIU, USIUCLK_READ_SYSCLK_CONTROL_REG, NULL );
>      pllReg = ioctl
(USIU,USIUCLK_READ_PLL_LP_RESET_CONTROL_REG,NULL);
>     }
> 
> }
>   
>    I found that the value of SCCR always became 0x81290000, it 
> showed that the BUCS is 1. Why did it differ with the value I set? 
> Why did it not be found in the MPC566EVB?  
> 
> 
> 
> 
> 
> 
> 
> --- In [email protected], "Dobbin Allan-r11834" 
> <Allan.Dobbin@> wrote:
> >
> > You have to verify not only the cycstal circuit, but also the 
> associated
> > clock circuitry i.e. MODCLK, Vddsyn, Xfc, etc. Make sure your 
> board is
> > coming out of reset.  Obviously the sysclock/clkout depend on 
> values
> > programmed into SCCR (EBDF allows a clkout /2 option) and MF 
> withing
> > PLPRCR.
> >  
> > 
> > 	-----Original Message-----
> > 	From: [email protected] 
> [mailto:[email protected]] On
> > Behalf Of illtll801021
> > 	Sent: Thursday, June 08, 2006 11:01 PM
> > 	To: [email protected]
> > 	Subject: [MPC500] Problems are about the MPC566's CLOCK
> > 	
> > 	
> > 
> > 	Hi everyone:
> > 	I'm puzzled by the MPC566's CLOCK. I used the Axiom 
> MPC566EVB
> > and 
> > 	Codewarrior. I used MPC500_Quick_Start's GCT to set the 
> system
> > clock on 
> > 	40Mhz,and the same to Clockout. I debuged it in internal 
> flash
> > and the 
> > 	crystal oscillator is 4 Mhz. When I debuged it with the
> > MPC566EVB, it 
> > 	is all right. But when I debuged it with my board that the
> > circuit of 
> > 	crystal is same to the MPC566EVB, the Clockout output 2Mhz. 
> Why?
> > Please 
> > 	help me! What should I do? Thanks!!!
> > 	liulong
> > 	
> > 	
> > 	
> > 
> > 	 
> > 
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
>






------------------------ Yahoo! Groups Sponsor --------------------~--> 
Home is just a click away.  Make Yahoo! your home page now.
http://us.click.yahoo.com/DHchtC/3FxNAA/yQLSAA/dN_tlB/TM
--------------------------------------------------------------------~-> 

-----------------------------------------------------------
To learn more about Freescale Microcontrollers, please visit
http://www.freescale.com/mcu


 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/MPC500/

<*> To unsubscribe from this group, send an email to:
    [email protected]

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/