HI, ^^ [design for JTAG programmable board]

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Could I ask you how to make a target board?
I want to program through JTAG interface.
So could you tell me this will work?

1. Simple connection : Vcc.jpg!
www.evilmadscientist.com/article...
I saw this site.
So Is this drawing enough as a target board?

I'm worried about Vtref.
and Lajon and bobgardner answered it for me.
Thank you so much - Lajon,bobgardner ^^

2. operating circuit : target circuit.jpg
this circuit is datasheet and simple connection's combination. I want to use this circuit as a battery management system.
I want to make a simple operating cirtcuit to burn it and evaluate it with oscilloscope.
(Or Could you recommand other method?)
Or I'll learn how to make evgaluation circuit.
As like you show me, I wanted to use ATAVRSB100.
but i couldn't get it, It's out of stock.
But the circuit is useful.^-^ and detailed.
I'll change my circuit.
Thanks a lot. ^^

3. It provides Parallel programming,too.
making parallel connection would be better or needed?(this chip don't provide ISP programing)
The microcontroler is avr atmega 406.
this chip is LQFP type
Thank you so much.^^ :wink:

I'm sorry. all the picture is hard to see.
If you download the picture, U could see it
more big and clear picture.
So Sorry .. for unconvinient.

[stupid thread title corrected]

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Last Edited: Wed. Jul 14, 2010 - 01:19 AM
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Quote:
Should I connect Vtref to Vcc or Vref ??

Vcc, it is a reference for Vcc as used on your board (aka target) - it has nothing to do with the ADC reference Vref. Think about it, why would the JTAG interface care about Vref?
/Lars

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A more complete schematic for atmega406 is here (I guess you will be using the battery features or there would be no point selecting this AVR chip):
http://www.atmel.com/dyn/resourc...
/Lars

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Vtref is so the jtag sw on avrstudio can read the voltage on the target board. If there is no target voltage, you get a dialog box that says 'no target voltage'. Then you slap your forehead and say 'Doh!' and turn on the target voltage.

Imagecraft compiler user