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Re: [avr-gcc-list] reset disable (rstdisbl)

From: Patrick Blanchard
Subject: Re: [avr-gcc-list] reset disable (rstdisbl)
Date: Mon, 10 Oct 2005 08:57:17 -0500

On Mon, 2005-10-10 at 09:23 +1000, Neil Davey wrote:
> address@hidden wrote:
> >Hi,
> >
> >If the "rstdisbl" fuse is programmed on an AVR,
> >is there any way to unprogram this bit over the
> >SPI ISP interface?  I have an atmega168 qfp32 chip
> >that I am trying to get the fuse bits programmed 
> >on, but I think I messed up!  I should probably
> >figure out how to use avrdude I guess, anyone have
> >any tips for programming atmega168 fuses?  I am using
> >an ISP windows program by Adam Dybkowski.
> >
> >  
> >
> Once you program the External Reset Disable fuse, you can't use the ISP
> interface, at it needs the reset.
> On the Tiny13 I've used, and probably your device, you need to use a
> high voltage programming method
> to reprogram the fuses back. Check the datasheet in the fuses section,
> it should tell you what method you need to use..
> Regards
> Neil Davey

is this a flaw of Atmel's design, or of avrdude?

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