Date:         Fri, 14 Sep 2007 23:22:00 -0700
Reply-To:     David Kao <dtkao0205@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Kao <dtkao0205@YAHOO.COM>
Subject:      Re: ECU firmware location
Comments: To: tinker man <tinkerman007@GMAIL.COM>
In-Reply-To:  <1b0df96d0709142139j2f7e1e39i34c8fd5c4d3fec22@mail.gmail.com>
Content-Type: text/plain; charset=iso-8859-1

Intel 8049H 8-bit microprocessor contains program memory(ROM) and data memory(RAM).
Look at this data sheet for more info: http://www.datasheetarchive.com/preview/492619.html

David

--- tinker man <tinkerman007@GMAIL.COM> wrote:

> Hi all,
>
> This is kinda getting in-depth into embedded systems design, but does
> anybody know if the firmware for our ECU's (Digifant or Digijet)
> resides completely on the 2732 EPROM or is part of it contained also
> INSIDE the microcontroller itself?
> The reason I'm asking this is because I suspect I have a fried
> microcontroller (Intel 8049H) but if it's a custom version with
> protected firmware inside, replacing it won't solve the problem. My
> CPU reads:
> MAF 8049H P A167
> 078801
> DSD8905V5 U
> WBX82HSCH
> (C) INTEL 1977
>
> That WBX82HSCH stuff seems to hint it's a custom version
> (WBX=WaterBoxer) with protected firmware, with some of the firmware
> also outside in the external EPROM.
> Any guru's out there?
>
> Cheers,
> TM
>




____________________________________________________________________________________
Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more.
http://mobile.yahoo.com/go?refer=1GNXIC