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

[wlewis]

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
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
> 
> 

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