H8s Security (1000$ as a compensation )

[T&E]

Hi,
I need to know the procedure to protect Hitachi H8-2134F flash eprom
content against reading out.
1000$ as a compensation to the first person who will give us this procedure
by this week
May you help me?
T&E

[William R. Frensley]

Let me see if I understand this. You want a memory whose contents
cannot be read out? What you are looking for is a write-only memory
(WOM). Such devices can be made from a wide variety of materials, including
wood. But, if you insist upon using a particluar catalog part, a 200 V,
1 sec. pulse to the Vcc terminal should convert almost any IC into a WOM.

- Bill Frensely

[Frank Bemelman]

William R. Frensley <fren...@utdallas.edu> schreef in berichtnieuws
3985AB69...@utdallas.edu...

> Let me see if I understand this. You want a memory whose contents
> cannot be read out? What you are looking for is a write-only memory
> (WOM). Such devices can be made from a wide variety of materials,
including
> wood. But, if you insist upon using a particluar catalog part, a 200 V,
> 1 sec. pulse to the Vcc terminal should convert almost any IC into a WOM.

The H8-2134F is a controller with internal flash eprom.

Met vriendelijke groeten,
Frank Bemelman
(reageren per email ? verwijder dan de 'x' uit mijn emailadres)

[Malcolm]

are the H8s any good to start with?

T&E <electr...@electrosystem.com> wrote in message
news:8m3k7i$v3c$1...@pinco.nettuno.it...

[John Robertson]

If you have a device programmer that handles this device and the
device has a security setting, then a well designed device programmer
should enable you to toggle that bit. Consult the manufacturer of the
programmer for the process if you can't find it.

John :-#)#

On Mon, 31 Jul 2000 12:24:22 +0200, "T&E"
<electr...@electrosystem.com> wrote:

>Hi,
> I need to know the procedure to protect Hitachi H8-2134F flash eprom
>content against reading out.
>1000$ as a compensation to the first person who will give us this procedure
>by this week
>May you help me?
>T&E
>

(Please post followups or tech enquires to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
mailto:j...@flippers.com, web page http://www.flippers.com
"Old pinballers never die, they just flip out."

[Jan Panteltje]

>are the H8s any good to start with?
>

I have used the H8 3337 and H8 3333 and it is OK.
Jan

[William R. Frensley]

John Robertson wrote:
>
> If you have a device programmer that handles this device and the
> device has a security setting, then a well designed device programmer
> should enable you to toggle that bit. Consult the manufacturer of the
> programmer for the process if you can't find it.
>

All these board-level engineers seem to think that anything that
won't come out through the pins is secure. Just remember that if
someone really wants your microcode, they can unpackage the die and
directly probe it.

- Bill Frensley

[Jan Panteltje]

>>are the H8s any good to start with?
>>
>I have used the H8 3337 and H8 3333 and it is OK.
>Jan
>

ahum make that last one 3334 of cause
Jan

[T&E]

I must program the 2134 on board so I need the procedure.
Thank you

John Robertson wrote in message ...

>If you have a device programmer that handles this device and the
>device has a security setting, then a well designed device programmer
>should enable you to toggle that bit. Consult the manufacturer of the
>programmer for the process if you can't find it.
>

[Anai]

Hi T&E,

I am keen to protect Hitachi H8-3064F flash eprom content.
Would like to know if you have the procedure to protect H8 MCU and if so willing to share the knowledge?

Regards
Anai