AVR-Chat

John,

   David gave one example, here are some more (from the MEGA168):

High Fuse Byte 	Bit No 	Description 		Default Value
RSTDISBL(1) 	7 	External Reset Disable 	1 (unprogrammed)
DWEN 		6 	debugWIRE Enable 	1 (unprogrammed)
SPIEN(2) 	5	Enable Serial Program 	0 (programmed, SPI
			and Data Downloading	  programming enabled)

Is RSTDISBL enabled or disabled by being unprogrammed?  In this case I 
believe that 1 (unprogrammed) enables the external reset.  How about 
DWEN?  In this case, I believe that a 1 disables the debugWire.  In our 
third case, a 0 (programmed) ENABLES the serial programming.

This pretty much defines confusion when it comes to dealing with AVR 
fuses I think.  I have to look at how the device behaves and then look 
at the default settings to see how to set the blasted fuses.  It isn't 
terribly obvious just by reading the documentation.

DLC

John Samperi wrote:
> At 04:26 PM 24/03/2009, you wrote:
>> Yeah, but sometimes fuse programmed turns a feature on and sometimes it
>> turns a feature off.
> 
> ??can you give us an example of when a programmed fuse turns a feature off?
> 
> 
> Regards
> 
> John Samperi
> 
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