AVR-Chat

Here goes the SCH.............
I someone realises what ist wrong, please tell me

Thanks

Javier



-----Mensaje original-----
De: Stefan Trethan [mailto:stefan_trethan@gmx.at]
Enviado el: Jueves, 03 de Febrero de 2005 12:06 p.m.
Para: AVR-Chat@yahoogroups.com
Asunto: Re: [AVR-Chat] Re: Bootup/reset very big problem



On Thu, 3 Feb 2005 11:36:54 -0300, Javier Fiasche <jfiasche@tutopia.com>
wrote:

> Ok, thanks Zack, i am using a programmer called Ser2conmini, its uses
> Com port control  and data signals, i made it myselfThe configuration
> bits are configured ok, the cpu runs, but only with an external power
> source connected to the rst line. If i just plug the programmer to my
> target board it begins o run, but as i disconnect it, it halts. Same
> happens if i do not plug the isp at all. I think it has something to do
> with RST


Javier,

If you measure the voltage at RST with and without the programmer, and
they are both logic high, it makes no sense that it has to do with RST.
The current has no tag, the atmel can't tell where it came from.

Do you have a schematic? i still think a pullup or something is on another
pin.

ST



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