%META:TOPICINFO{author="blundar" date="1078510560" format="1.0" version="1.1"}% %META:TOPICPARENT{name="McuReaders"}% First of all i'll thank Nico-HRED again for the info he posts in the general forum about the "66P507 Readout".

I adapted the idea and simplified it, so everyone of us can now readout the content of his 66207.

My reader is a bit different of the one he posted. I need a ECU with a 66207, a 27C512 (EProm), a 1 k Resistor, two wires and a RS232<->TTL converter.

The most of you will allready have this, if not, the parts are usual and cheep.

We need to modify the ECU a bit to have a nice 66207 reader, here is a short description:

• If your ECU isn't chipped, you need to add the 74HC373, the EProm socket and the 1kOhm resistor (R54).
• Connect a wire from the 66207 pin 16 (A15) to the Eprom Pin 1 (A15).

• Connect a wire from the 66207 Pin 19 (P2.2) to the 66207 Pin 27 (-EA).
• Remove the Jumper J1 and replace it with a 1kOhm resistor.
• Put in the 27C512 Eprom, programmed with my "ROMREADER" program on it.
• Connect your PC via a RS232<->TTL converter to the ECU (see Data Logging for more information).

Let's read a 66207:

• Switch off your ECU, or leave it off.
• Start the program on the PC: DOWNLOADER
• if the Address display isn't 0000, then click on RESET.
• Switch on your ECU
• After around 1 secound you should see the address counter running
• after almost a minute (i never stopped it) the address counter should show 8001
• now click SAVE to save your rom.

If something dosn't work, retry the procedure but don't forget to click on RESET.

Now have fun with your own 66207 reader.

Doc

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