Alessandro Zummo wrote:
>
> Il 14-Apr-98, Caisson scrisse:
>
> > In newer versions the Code-protect is a _fuse_ and thus a one-time only
> > thing
> > (even in the windowed versions !).
>
> That's really bad... i hope microchip will change this
>  behaviour....
>
> --
>
>    - *Alex* -
>
>   http://freepage.logicom.it/azummo/

I would bet Microchip did this to keep people from hacking the code.
>From a security standpoint, it's great that they did something.
The 16c84 is used in europe in television access smartcards like the
ones sticking out of your DSS receiver.  It is easily hackable and I'll
bet there are millions of copies out there.

If you are just making prototypes in your basement, then don't blow the
fuse; security isn't important.  But make sure it's blown for shipped
product if you need for your code to be secure.