OKI M66xxx MCUs

[Ian Jones]

I did this a couple of years ago for a customer which involved using the
external memory provision on the circuit board to write code to extract the
internal memory and then configuring the ecu to run from the external memory
with the internal memory copied into an EPROM. As I remember it was a fun
project.

Ian Jones

http://www.cobi.demon.co.uk

-----Original Message-----
From: Adrian Teo <adrian.teo at asu.edu>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: 15 October 1998 00:27
Subject: OKI M66xxx MCUs


>Ok here goes my first full fledged DIY-EDI post.
>
>I was wondering if anyone on this list has any experience with the OKI
M66xxx
>series Microcontroller, in particular the ones used on Honda ECU's.
>
>I'm trying to extract the fuel map etc from several of these ECU's but some
of
>them come with the maps "hardcoded into the chip" (?) and hence no EPROM is
>present in the ECU. There are provisions for an external EPROM socket which
I
>assume can be configured to override the hardcoded program on the main
chip.
>
>The MCU in particular is a OKI M66207 MCU which comes in a 68 pin PLCC
format.
>Any suggestions (constructive or otherwise) are greatly appreciated.
>
>Thanks!!
>
>-AT
>
>--
>------------------------------------------------------------------------
>Adrian Teo                               e-mail: adrian.teo at asu.edu
>System Administator
>Instruction Support, Arizona State University
>Ph: 602.965.9411                         http://hybrid.honda-perf.org
>Fx: 602.965.2724     Pg:602.204.1831     e-page: adrian at falcon.asu.edu
>------------------------------------------------------------------------