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

From: Bernard Fouché
Subject: Re: [avr-gcc-list] ATMega32 fuse bit problem
Date: Tue, 13 Nov 2007 11:32:10 +0100
User-agent: Thunderbird (Windows/20070728)

If you focus on erasing the chip to regain control of it, then you can use nearly anything that provides logical zeros and ones as a clock.

For instance I recovered chips sometimes by using UART traffic because I had no other hardware at hand: I took a RS232-UART converter, sent a big file from a terminal emulator (with no particular protocol, just raw byte sending) and I tried a few times to erase the chip until it worked ;-)

Csroluxx wrote:
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

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,


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Hi you can use one from old digital clock (or new one)

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