AVR-Chat

At 08:52 AM 19/04/2007, you wrote:
>how do you hook up the Dragon to the
>external board?

It's the standard ISP setup, it is well documented in the STK500
docs.

>Looking at the "Devicesheet for the ATmega48

If you are using the M48 go to my website's download page
and have a look at the MTERM2 diagram and the ISP connector (PROG).
The board shows the M8 but it is pin compatible with the M48/88/168
series also. REMEMBER NOT to put the cap (C9) in the reset pin if you
intend to use DW for debugging

>I see that you can adjust the ISP frequency

Set it at 250KHz as it will work with all chip with a clock
of >1 MHz

>but what is the VTarget used for?

With the Dragon is shows what voltage the target is running at.
With the STK500 which has a VTG output you can actually set the
prototype area voltage.

Regards

John Samperi

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