AVR-Chat

John,

I think that's good news but how do you hook up the Dragon to the
external board?

Looking at the "Devicesheet for the ATmega48 in the Dragon's help file
it looks like pin 6 of the VCC header (on the Dragon) is connected to
pin 2 on the ISP header (also on the Dragon).  Pin 4 of the VCC header
is shown connected to the ATmega's pin 7.  

What is the purpose of the "Board" tab in the AVR Dragon dialog box? 
I see that you can adjust the ISP frequency but what is the VTarget
used for?

Thanks,

Richard Cooke

--- In AVR-Chat@yahoogroups.com, John Samperi <samperi@...> wrote:
>
> At 08:22 AM 19/04/2007, you wrote:
> >Is it possible to change the output voltage on a Dragon?
> 
> Not that I know of, unlike the STK500. The voltage output
> is 5V from the USB bus. You can put a 3V LDO regulator on your
> board and run it that way, you should be able to read the
> VTG from the Dragon in programming mode.
> 
> >I have the unit and I'd like to hook it up to a 3.0V circuit
> 
> No problem I have worked with 3.3V circuit. The Dragon uses
> the VTG voltage from the target board to adjust the it's I/O
> level, in other words the target voltage can be anything from
> 1.8V to 5V and the Dragon should work.
> 
> 
> Regards
> 
> John Samperi
> 
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