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

[Neil Davey]

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