Re: [avr-chat] AVR dragon question

[Daniel O'Connor]

On Sat, 29 Mar 2008, Joerg Wunsch wrote:
> "Daniel O'Connor" <address@hidden> wrote:
> > Can someone tell me exactly what the AVR Dragon does for JTAG
> > debugging?  The info file from Atmel says it has JTAG & debugWire
> > "emulation interfaces" but I don't really know what they mean by
> > that :)
>
> That's the debugging interface.  It's called emulation for historical
> reasons (JTAG and debugWIRE debugging have replaced the much more
> expensive emulators that were used instead previously).

OK.

> The JTAG debugging limitation is devices <= 32 KiB of flash ROM, no
> Xmega (so far?), no AVR32 (so far?).  Note that AVRs > 32 KiB of
> flash ROM can still be programmed through JTAG nevertheless.

Sounds good, thanks for the info. I see avrdude & avarice support it 
which is going to be handy :)

Thanks for the info Joerg.

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
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