Not quite sure what you mean by security bit.  But you can set code
protection and re-use them.  I do it all the time.

Martin

> Hi,
>
> It seems to me that ones the security bit is set it is not possible to erase
> or reprogram these parts is this true ?
>
> Cheers
>
> Johan Pretorius
> (083) 6506752 (Cell)
> (011) 7732423 (Phone)
> (011) 7732184 (Fax)