Easiest eeprom dump VDO CDR 2005

[Gmoy]

Hi guys. Trying to decode a Siemens VDO CDR 2005 (E) from a Vauxhall Corsa and understand I need the data off the 24C16 chip. As I'm new to eeproms and have no equipment I'm looking for the easiest and cheapest way to get a dump off of it. Can solder OK but would rather not desolder the chip if possible.

So was thinking of just buying a cheap ebay programmer such as CH341A, then running wires from the pin holes to the relevant terminals in the circuit, attaching them temporarily with a little solder. Do you think this would be OK or is there complications in working with the chip in situ in the circuit? Just need to read, not program I believe.

Any feedbac/ suggestions much appreciated.

Cheers

[Galee]

Hi best to use hot air to remove chip to get 100% good read.


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[autogeneral]

Hi best to use hot air to remove chip to get 100% good read.


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but if you have'nt hot air , use soldering iron with a lot of (?tain) sn

[TR0UBLESH00TER]

Just did a CDR2005 today,better not try to remove eeprom because it is fragile and glued underneath .
Instead solder wires for ground ,Vcc ,SDA and SCL and use adapter SMD to DIL ,put in TL866 ,power up radio (or else you got an error from TL866 ) and read /write fine in circuit .Don t forget to short the Xtal near cpu !

[Gmoy]

OK great, thanks. Think I'll try do it in circuit since I don't have my hot gun here. A few things though. Since this is a one time thing do you think I could get by without the adapter and just jam wires strait In the terminals on my programmer? And is there any reason a cheaper CH341A programmer won't work?

Also do I still need to short the crystal if I'm only reading, no writing?

Cheers

[TR0UBLESH00TER]

Wires are good enough/don t know about CH341 /yes ,short the crystal so MCU won t wake up and jam the reading /don t forget to power up the radio because usually the programmer has only a small amount of power avalaible on the +5 rail for protection reasons .
Don t get scared ,it is a perfect first time job for a beginner ,just be careful with the wires .Good luck !

[Gmoy]

Hi again, I'm just getting around to trying this so apologies for the bump.

Trouble is that I don't know where to find the xtal. Perhaps someone could give me some pointers? I took a picture under the stereo's cover, I understand the eeprom is the small chip beneath and to the right slightly of the large one (MCU?) and I've read that the xtal is 'near' the MCU.

Here's the image:
i.imgur.com.OziiFqf.jpg

Cheers

[shooting]

Hi again, I'm just getting around to trying this so apologies for the bump.

Trouble is that I don't know where to find the xtal. Perhaps someone could give me some pointers? I took a picture under the stereo's cover, I understand the eeprom is the small chip beneath and to the right slightly of the large one (MCU?) and I've read that the xtal is 'near' the MCU.

Here's the image:
i.imgur.com.OziiFqf.jpg

Cheers

Are we talking here or on the other forum?.... I can't keep up ;)
Just remove the chip and read it...

wbr

[KierAn20]

I'm doing a v/c pot on one of these this morning :)

See attached images, for xtal top and bottom. I just remove the eeps with hot air, never tried reading one in-circuit.

HTH

[shooting]

I'm doing a v/c pot on one of these this morning :)

See attached images, for xtal top and bottom. I just remove the eeps with hot air, never tried reading one in-circuit.

HTH

These are a pain with Hot Air as they are glued down, I found putting a flat blade under the chip to help it lift when unsoldering :)

wbr

[Gmoy]

Wicked, thanks everyone, will give this a stab tonight

[Gmoy]

Oh, just thought of another problem. Apparently you need to power the radio up when reading eeprom in situ. On a normal radio that would be fine as the wires come out long enough to pull the radio out still plugged in. This radio doesn't have visible wires coming out. It just slides straight into sockets at the back of the DIN slot. What do you do about this HTH?

Edit: just looked inside the slot and it seems the cage is held in place by one torx screw. I'm guessing if I pull this out I have access to longer wires behind?

[RadioChiP]

You can read 24c16 in-circuit you need short cable xtal