RE: [avrdude-dev] atmega128/atmega103

[Sander Pool]

It's easier to use AVR studio and an STK500. It shows all the current fuse
bit settings with explanations what they do. Check and uncheck the boxes to
set the new values. Make sure your current clock source settings are correct
for example.

Of course avrdude works great too and can be used on a variety of systems
whereas AVR Studio is limited to Windows.

        Sander


> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden
> Behalf Of Joerg Wunsch
> Sent: Saturday, April 05, 2003 12:50 PM
> To: Erick Castillo
> Cc: address@hidden
> Subject: Re: [avrdude-dev] atmega128/atmega103
>
>
> As Erick Castillo wrote:
>
> > Only problem is, I have no idea how I
> > might have access to these bits. How can I disable compatibility?
>
> Simplest way: avrdude's »terminal mode«.
>
> Run avrdude with the usual flags you need (like -p m128 -c whatever),
> plus -t.  This starts an interactive mode that lets you access the
> AVR's memory regions.
>
> The M103 fuse is located in the »extended fuse bits«, named »ef« in
> avrdude.  You can print them with
>
> r ef
>
> (read extended fuses)
>
> The default value is supposed to be 0xfd.  Bit 1 is the M103 fuse,
> which is set (i. e., is 0) by default.  To clear it, you need to
> write a 1 bit, resulting in 0xff for the entire byte:
>
> w ef 0 0xff