Fried my atmega

I think i have fried my chip with wrong fuse bits.I exactly reversed the
bits in codevision..But now i know..The next chip is nicely
programming..What can i do to erase the earlier chip?I cant even access it
now.

"abicash" <jagtapabhijit06@gmail.com> skrev i meddelandet 
news:65mdncASmMW2z4LanZ2dnUVZ_jKdnZ2d@giganews.com...
>I think i have fried my chip with wrong fuse bits.I exactly reversed the
> bits in codevision..But now i know..The next chip is nicely
> programming..What can i do to erase the earlier chip?I cant even access it
> now.

Parallel programming  on an STK500.

-- 
Best Regards,
Ulf Samuelsson
This is intended to be my personal opinion which may,
or may not be shared by my employer Atmel Nordic AB 

In article <65mdncASmMW2z4LanZ2dnUVZ_jKdnZ2d@giganews.com>, "abicash" <jagtapabhijit06@gmail.com> writes:
> I think i have fried my chip with wrong fuse bits.I exactly reversed the
> bits in codevision..But now i know..The next chip is nicely
> programming..What can i do to erase the earlier chip?I cant even access it
> now.

If you don't have a STK500 or similar as Ulf suggests, have you worked
out what clock source that you did actually set it to ?

Simon.

-- 
Simon Clubley, clubley@remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980's technology to a 21st century world

Simon Clubley wrote:
> In article <65mdncASmMW2z4LanZ2dnUVZ_jKdnZ2d@giganews.com>, "abicash" <jagtapabhijit06@gmail.com> writes:
>> I think i have fried my chip with wrong fuse bits.I exactly reversed the
>> bits in codevision..But now i know..The next chip is nicely
>> programming..What can i do to erase the earlier chip?I cant even access it
>> now.
> 
> If you don't have a STK500 or similar as Ulf suggests, have you worked
> out what clock source that you did actually set it to ?
> 
Some Atmegas at least, if you wrong-foot the fuse bits, get set into a
mode requiring an RC oscillator, with external RC connected to the
XTAL1/2 pins. I've taken to putting N/F component sites on these pins on
every Atmega board I do, just in case.

In article <47243f31$0$17151$5a62ac22@per-qv1-newsreader-01.iinet.net.au>, David R Brooks <davebXXX@iinet.net.au> writes:
> Some Atmegas at least, if you wrong-foot the fuse bits, get set into a
> mode requiring an RC oscillator, with external RC connected to the
> XTAL1/2 pins. I've taken to putting N/F component sites on these pins on
> every Atmega board I do, just in case.

Having recently switched from the HC08 to the AVR for my hobbyist projects,
this is something that I am _very_ aware of (and check multiple times) while
setting fuse bits. :-)

I was thinking that the OP could recover his AVR if he could work out what
clock source the AVR was now expecting.

Simon.

-- 
Simon Clubley, clubley@remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980's technology to a 21st century world