[Tinyos-help] atmega128 clock frequency

[roberto pagliari]

Hi Michael,

I get the following configuration

fuse low byte  0xff
fuse high byte 0xff
fuse extended byte 0xff
calibration byte      0xff - read only
lock bits  0xff

BLB12 -> 1
BLB11 -> 1
BLB02 -> 1
BLB01 -> 1
LB2     -> 1
LB1     -> 1

simply issuing the command >>uisp -dprog=data -dpart=ATmega128 --rd_fuses

what did you mean by that?

On 7/17/07, Michael Schippling <schip at santafe.edu> wrote:
>
> whew...now I don't have to go look up the config bytes...
> Is there an internal osc that will run faster than the xtal?
>
> And are we certain that the config is really all 0xff?
> That sounds too conveniently like a read error...
>
> MS
>
>
> Giri Baleri wrote:
> > The low byte value of 0xff indicates that the ATmega128 is configured to
> > use external oscillator. The frequency of the external oscillator is
> > normally 7.3728 MHz.
> >
> > Giri
> >
> > ------------------------------------------------------------------------
> > *From:* tinyos-help-bounces at Millennium.Berkeley.EDU
> > [mailto:tinyos-help-bounces at Millennium.Berkeley.EDU] *On Behalf Of
> > *roberto pagliari
> > *Sent:* Tuesday, July 17, 2007 3:27 PM
> > *To:* schip at santafe.edu
> > *Cc:* tinyos-help at Millennium.Berkeley.EDU
> > *Subject:* Re: [Tinyos-help] atmega128 clock frequency
> >
> > my actual configuration, running
> > uisp -dprog=data -dpart=ATmega128 --rd_fuses
> >
> > gives me the following
> > fuse low byte  0xff
> > fuse high byte 0xff
> > fuse extended byte 0xff
> > calibration byte      0xff - read only
> > lock bits  0xff
> >
> > BLB12 -> 1
> > BLB11 -> 1
> > BLB02 -> 1
> > BLB01 -> 1
> > LB2     -> 1
> > LB1     -> 1
> >
> > so, is it 7.3Mhz?
> >
> > On 7/17/07, *roberto pagliari* <bobtinyos07 at gmail.com
> > <mailto:bobtinyos07 at gmail.com>> wrote:
> >
> >     my fuse low byte is set to 0xff. this means the clock frequency is
> >     7.3Mhz (not 8Mhz) right?
> >
> >     thank you in advance
> >
> >
> >     On 7/17/07, *Michael Schippling* < schip at santafe.edu
> >     <mailto:schip at santafe.edu>> wrote:
> >
> >         I think "change the crystal" is the only answer for the ATMEGA.
> >         It's sounds like the MSP can be overclocked in software though.
> >         MS
> >
> >         roberto pagliari wrote:
> >         >  how can I set the clock frequency of motes microcontroller?
> >         >  I'm using micaz mote right now
> >         >
> >         >
> >         >
> >
> ------------------------------------------------------------------------
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