I have two front panel graphics LCD modules (made by Hyundai) from a 
Tektroniks/Xerox 8200 phaser (HG12628). I'm toying with the idea of 
using them in a project or two and am painstakingly  tracking 
components on the board.

I wonder if anyone has any idea what microcontroller has been used. It 
is obviously masked to Tektronix specifications, and I think is 
controlled via an I2C interface.
I'm either going to see if I can work out how to talk to the thing, or 
just wire a Pic in it's place.

The uC is a 44 pin PLCC uses an 8MHz crystal has 5 pins connected 
directly to VDD and 8 to VSS/GND. crystal is on pins 5 and 6.

Only markings on the uC are AMI 9918nwk and then the Tektroniks part 
number.

This must be one of the few modules where details have yet to leak 
onto the internet :( .

I'm suspecting this might be a Motorola part or some sort of 805x 
variant. The LCD drivers are   2 x SEC KS0108B's and KS0107 - I have 
the data sheet for these.

Now why they have a flip flop whose clock pin is permanently wired 
high is my next bit of detective work, and no, it doesn't seem to 
connect to any other component that might bring it low.

Colin
--
cdb,   3/08/2009
 
--




colin@btech-online.co.uk

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