AVR-Chat

At 09:23 PM 7/25/2005, n4ij wrote:
>I received a small Olimex development board that included a Tiny2313.
>The 7805 voltage regulator is apparently bad and puts out the same as
>it's input voltage (12volts). Needless to say, I suspect that 12volts
>on the Tin2313 has zapped it.

Almost certainly.

>   But, I got curious and looked at the
>differences between the 2313 and tiny2313. One of the differences is
>that there is a fuse bit for the oscillator.  Being new to AVR - if
>the fuse bit is set, is it correct that that is the confiugration
>forever?

Nope, fuse bits can be reset, IF you have the right programmer.
It is possible to get it into a state where the simple programmers 
can't talk to it anymore.

>  A fuse bit is just like a regular fuse, I assume. Blow it
>and it is blown.

Nope, completely eraseable. :)