On Wed, May 29, 2002 at 10:56:48PM +0400, AMIN wrote:
> hello,
>
> I am an enngeniring student and i am new in manupulation of pic microcontroller.
> is there a programme that can erase a pic when it is code protected ,i tried to search on the net but did not find any one who support the (JDM programmer ), icprog dont erase protected pics,and wher can i find a visual basic source code t deal with pics.
> thank you.

There are three categories:

1) OTP PICs. These are EPROM based and do not have a window on the die. Once
   the code protect fuses are set on this type, they cannot be reset under
   any normal circumstance, programmable or otherwise.
2) Windowed EPROM PICs. The code protect fuse is partially shielded under the
   window. So while they can be erased, it takes a significant amount of time
   to do so and virtually guarantees that any other EPROM locations will be
   completely erased before the code protect fuses is erased.
3) Flash PICs. Code protect fuses can always be erased programmatically simply
   by doing a Bulk Erase of the part.

Hope this helps,

BAJ

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