AVR-Chat

Hi David

Thanks for you reply

But i can fix the problem soldering a 1K Pull UP in the TCK line of JTAG in
the ATmega164P board ... I don´t see anything about this in the datasheet
but works.

hehehehe

Emerson Santos




2009/10/16 David Kelly <dkelly@hiwaay.net>

>
>
>  On Fri, Oct 16, 2009 at 09:22:28AM -0300, Emerson Santos wrote:
> > HI
> >
> > I?ve a AVR DRagon and I made a 10 pin flat cable with about 30 cm
> > length ... well , when I put a ATmega16 or mega32 .. its work fine (I
> > use the AVRSTudio 4.16 build 638), but with ATmega164p the JTAG fail
> > with a message that not can?t read ... when I use my hand to envolve
> > the flat cable .... Its work ...? Its a EMI ? EMC ???
> >
> > Anyone have this type of problem ?
>
> Yes. Have had that sort of problem with the Dragon where an ECROS ICE
> Cube worked perfectly.
>
> Not sure that just one thing "fixed" my problem but the Dragon behaved
> differently for different length of cable. Seemed to work best at 6",
> about 14 cm, which was as short as I could make it.
>
> Also put 1/4" thick rubber feet on the bottom of the Dragon to hold it
> off the metal top table. Believe that helped but wasn't a complete cure.
> The combination of rubber feet and short cable got things working.
>
> --
> David Kelly N4HHE, dkelly@HiWAAY.net <dkelly%40HiWAAY.net>
> ========================================================================
> Whom computers would destroy, they must first drive mad.
>
> 
>


[Non-text portions of this message have been removed]