Motorola microcontroller identification

[Richard M]

Ludis,
The ECU is fairly simple by today's standards (only controls ignition and
overboost protection), way less complicated and earlier than EEC4. There are
a only few analog IC's apart from the processor, definitely internal EPROM
(probably mask ROM from the factory). I think it's 68HC05 family.. Motorola
have agreed by email that it is one of theirs, but unable to give any
information.
There is no edge connector.
Regards
Rich
----- Original Message -----
From: Ludis Langens <ludis at cruzers.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, December 04, 2001 11:14 PM
Subject: Re: Motorola microcontroller identification


> > Rich M wrote:
> >
> > I am trying to get information about a Motorola Microcontroller used
> > in European Ford Escort Turbo around mid-80's vintage - the chip id is
> > ZC85269CP, 40 pin DIP and has internal OTP Eprom.
>
> How do you know it has the internal EPROM?  If you are
> counting/following circuit connections, you might have overlooked an
> external ROM.  The Ford EEC-IV uses an 11 wire bus to communicate with
> external ROM.  This external ROM is in a 24 pin chip.
>
> Even though this chip has Motorola markings, it might be an Intel
> design.  Ford used both Intel and Motorola to manufacture the chips that
> Intel designed for Ford.  The Ford custom MPU is similar to the Intel
8096.
>
> Does your computer have a 30 pin edge card connector?  This connector
> can be used to read out the ROM, or to attach a ROM emulator.
>
> --
> Ludis Langens                               ludis (at) cruzers (dot) com
> Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
>
>
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