AVR-Chat

I thought looking at the fuses in AVR Studio was the way to check 
what fuses were set.  How do I check to see what fuses are set "0" 
and what fuses are not set "1"?  

Chris Atwan 

--- In AVR-Chat@yahoogroups.com, Brian Dean <bsd@b...> wrote:
> Hi Chris,
> 
> On Fri, Apr 16, 2004 at 01:56:39AM -0000, chrisatwan2000 wrote:
> 
> > I checked my fuses with AVR Studio and the following fuses are 
set:
> > 
> > BOOTSZ=11
> > BODLEVEL=1
> > CKSEL=1111 SUT=11
> > 
> > Any ideas??
> 
> The above fuses are in the low fuse byte.  You want to look at the
> "high" fuse byte - the JTAGEN bit is bit number 6.
> 
> In Atmel terminalogy, a fuse is "set" or "programmed" if it is '0'.
> It is "unset" or "unprogrammed" if it is a "1".  However, I think 
in
> AVR Studio, a check mark on the fuse setting sets it to a "0", 
i.e.,
> programs the fuse.
> 
> Look at the high fuse byte, specifically bit number 6.  If it is a
> zero, then the JTAG debugging interface is enabled.  If it is a 
one,
> then it is disabled.  It is enabled by default, so unless you 
disabled
> it, it is most likely still enabled.  If it is enabled, then that
> would most likely explain the problems with your program not 
getting
> the expected results when using PORTF.
> 
> For more info, the "Memory Programming" section of the ATmega128
> datasheet.  The high fuse byte is described on page 292 in the 
version
> I have.
> 
> -Brian
> -- 
> Brian Dean
> http://www.bdmicro.com/