84 Pin PLCC's

Niels Ezerman nez at cybernet.dk
Fri Nov 29 23:39:43 GMT 1996


Todd Knighton wrote:
> 
> Anyone know of any more Microcontrollers that use a 84 Pin PLCC layout.
> This computer I'm getting into doesn't have any number designations
> except for internal codes.  It's off a 97 911 C4S.  The chip is running
> at 15Mhz and the clock goes into pin 3 and I think 4, I see a 15Mhz wave
> at pin 3, but I looks like a land goes to the oscillator off 4 as well.
> Need to identify the Micro before getting into it any further.  On the
> top with the Bosch type proprietary numbers there's a large lower case
> "i" assuming Intel, but looked at the 80c186 and 80c196's and although
> they offer a 84 pin package, the clock's in the wrong spot.

I have just been reading something about the new Porsche Boxster,
2.5l 160 kW/ 6000 Rpm.

It uses a Bosch M5.2.2 ECU, 88 pin connector.
A Intel 87 C 196 kN is used and the second item has 
a memory of 104 kByte and 4 kByte SRAM.

Several data as:
Interior, Car color, engine hour counting is stored in the ECU.

There is made something special to protect program and data against
manipulation. If manipulation is made some engine corrections are
carried out.
Maybe the car will then only drive 10 miles/hour ;-)

Please tell me if you try it.

I have put a picture of the ECU on my homepage:

http://www.cybernet.dk/users/nez/nielsuk.htm

-By 
Niels Ezerman
Denmark



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