[ECOS] at91Arm7sek running without the pll
Tobias Nielsen
tobibobi@gmail.com
Mon Feb 25 16:05:00 GMT 2008
Nope, i have a situation where the the external components to drive
the PLL is not connected - therefore i have to run without the PLL
2008/2/25, Andrew Lunn <andrew@lunn.ch>:
> On Mon, Feb 25, 2008 at 03:47:26PM +0100, Tobias Nielsen wrote:
> > I have been sitting for some time to try to figure out a way to
> > completely skip the PLL AND at the same time use the main oscillator
> > bypass feature. I can see that the usage of the PLL is more or less
> > directly coded in to a macro in the header:
> >
> > hal/arm/at91/at91sam7s/current/include/hal_platform_setup.h
> >
> > But if i want to completely bypass that feature and follow the
> > instructions in the datasheet that states OSCBYPASS should be set to 1
> > and MOSCEN must be set 0 - i have absolutely no idea on how to put
> > that functionality in to the system without hacking a lot of code that
> > i in principle have no knowledge about...
> >
> > Do anyone know how to make that bypass?
>
>
> It will be a little bit messy.
>
> Why do you need to turn the PLL off? Can you live with the PLL simply
> multiplying by 1 and dividing by 1?
>
>
> Andrew
>
--
Yours kindly
Tobias Nielsen
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