Re: [avr-gcc-list] ATMega32 fuse bit problem

[Jeff Keyzer]

James,

You can also use high voltage parallel programming mode to set fuses even when 
serial communication is not possible (oscillator set incorrectly, reset pin 
disabled, debugwire enabled, etc.).

A while back I made a simple circuit to allow an Arduino to parallel program 
the ATmega44/88/168/328.  You can try using a circuit like this if the fix 
wlewis posted fails.

I believe the STK500 and the AVR Dragon also support HVPP.

Jeff Keyzer
address@hidden



On Sep 5, 2010, at 1:29 PM, wlewis wrote:

> 
> Hi.. I was able to "revive" a completely wacked out atmega32 by the
> following:
> 
> KEY -> attach a 12mhz xtal (instead of a 16mhz xtal) 
> 
> code for default with jtag disabled:
> avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0×3F:m -U
> lfuse:w:0xe1:m -U hfuse:w:0xd9:m
> 
> then re-attach your 16mhz xtal and use this: (defaults for 16mhz xtal / jtag
> disabled / fast power-up):
> avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0x3F:m -U
> lfuse:w:0xef:m -U hfuse:w:0xd9:m 
> 
> 
> //...how sweet it is
> 
> 
> 
> 
> James Pascoe wrote:
>> 
>> Hi All,
>> 
>> Apologies for the following question which is very OT, but there is a
>> good chance you guys can help.
>> 
>> I am using an ATMega32 and inadvertantly programmed the fuse bits wrong
>> :-( ... instead of setting
>> the fuse bits to use a 16 Mhz external crystal as the clock source, I
>> programmed the chip to use the low frequency
>> crystal oscillator setting. Of course now, I can not program the device
>> anymore.
>> 
>> Does anybody know if there is any way (other than getting hold of a
>> 32.768 Khz crystal) that I can recover the device ?
>> 
>> Many thanks for any suggestions,
>> 
>> James
>> 
>> 
>> _______________________________________________
>> AVR-GCC-list mailing list
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>> http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
>> 
>> 
> 
> -- 
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> http://old.nabble.com/ATMega32-fuse-bit-problem-tp12189077p29627870.html
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> 
> 
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