Lpc2000

--- In lpc2000@yahoogroups.com, Xtian Xultz <xultz@...> wrote:
>
> Em Qua 01 Fev 2006 20:53, arm7dude escreveu:
> > --- In lpc2000@yahoogroups.com, Xtian Xultz <xultz@> wrote:
> > > 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?
> >
> > I've seen occasional pll won't lock. I'm using a 2148 @12 mhz and pll
> > set to 48 mhz.
> >
> > Ed
> 
> Did you find any work around? My hardware will be powered up not by
a user but 
> bya system, and my somplete system will have 16 LPCs so I cant power
and 
> unpower many times until I can have a PLL working. 
> Maybe a timeout and soft restart can give a result?
> Any suggestions?
>

What values of MSEL and PSEL did you use. I found the examples a
little confusing. I'm guessing you're using MSEL=4 for 5x and PSEL can
be 2 for 4x. 10 mhz * 5 * 4= 200 mhz which is between 156-320 Mhz.

I've been using the 2148 with 12 mhz clock and 48 mhz CCL using
prebuilt applications without and problems.

Ed