Well
Guys i finally mannaged to make my Atmega32 run well. The thing was taht the PCB
manufacturer sended me a bad PCB, where net GND was split and not connected to
the uC. It wasnt a design problem, just a manufacturing one. I wasnt able to
find it before because the splited part was under the TQFP
atmega32.
Thanks
you all for the help. I found the problem beacuse one of you suggested
connecting all VCC and GND pins, and just connecting GND , it started to
run.
In the
future, i'll make sure that the PCB is ok, and i wopnt trust in manufacturers
any more!!!!!!
GND is
something to have in mind :-)
Well
regards and thanks a lot to you all
Javier
-----Mensaje original-----
De: Zack Widup [mailto:w9sz@prairienet.org]
Enviado el: Jueves, 03 de Febrero de 2005 06:08 p.m.
Para: AVR-Chat@yahoogroups.com
Asunto: Re: [AVR-Chat] Re: Bootup/reset very big problem
On Thu, 3
Feb 2005, Dave VanHorn wrote:De: Zack Widup [mailto:w9sz@prairienet.org]
Enviado el: Jueves, 03 de Febrero de 2005 06:08 p.m.
Para: AVR-Chat@yahoogroups.com
Asunto: Re: [AVR-Chat] Re: Bootup/reset very big problem
>
> > Trust me on this, my Xilinx parts library has parts with over 1500 pins.
>
> I'm picturing the poor repair guy with a soldapult, on pin 300.. :)
>
I once did repairs of consumer electronics and replaced a few chips with
64 pins. I made a tiny tip for my soldering iron out of wire (I think it
was #22) and worked out a way of threading a fine wire up under the pins
of the IC where they enter the body of the chip. After removing as much
solder as I could with solder wick, I'd pull each leg up off the board
with the wire, starting at one end. It took patience but it worked fine.
There's no way I'd have bothered with a 1500 pin device. Actually,
portable CD players, radios, etc. are so cheap now it isn't worth
replacing the 64 pin devices any more.
Zack
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