Re: [Uisp-dev] downloading to atmega162

[Owen S. Osborn]

---"Theodore A. Roth" <address@hidden> wrote ---
On Mon, 20 Sep 2004, Owen S. Osborn wrote:

>    I've been using uisp in dapa mode with a home brew cable, 
and this method
> has worked great with the atmega8 chip.  But while using this 
same method
> with the atmega162, uisp indicates that the chip is not 
responding and might
> be damaged.  (there is really no response as I probed the data 
out pin of the
> microcontroller with scope, and it is low during entire process).  I 
have double
> checked the wiring, and tried 5 different atmega162 chips, but 
none respond
> (i have also tried with and without external oscillator).
>    The strange thing is that with the same wiring the atmega8 
responds while
> the 162 does not, and I can't find anyting in the datasheets 
indicating
> additional connections are needed.  I've also tried avrdude, and 
the problem
> is the same: atmega8 works, while atmega162 doesn't respond.
>    Am I missing something here?, or could it be that all 5 chips 
I;ve tried are
> dead?  any help is greatly appreciated....

Did you check the fusing of the mega162?

---
Ted Roth
PGP Key ID: 0x18F846E9
Jabber ID: address@hidden
--- End of quote ---

    I am assuming the fuses are set to their factory default values,  
so the spi serial download enable fuse should be enabled  (as 
data sheet indicates).    is there another way to verify that the 
fuses?