NefMoto

Hi

Anyone know if I am able too do this without desoldering the chip? If not please could someone point out which chip?

what is written on the soic 8 chips you can switching off  . Can you make better pictures??

What is it out of?

Rick

I will try take better pics, its out of an 1.8 audi a4 I think a 1999 or older

the car is older you its a me 3.2 year 96  i think its the soic 8 chip on the front 24c02

over the 27c010

ok finally received my soic8 test clip so I can help my buddy.

Still not 100% sure on the location of the soic 8 chip on the board.

The only 2 soic 8 chips I see have the following numbers on them

top of the board

B58085
ST9527

bottom

B 55AN
B58283

my gq-4x programmer is also here and I havent used one before. With my soic 8 test clip I assume I connect the clip to the chip and the connect pin 1 to pin 1 on the block connector, pin 2 etc etc but on the gq-4x programmer what is pin  1?

never mind RTFM  ::)

still need some help figuring out which soic 8 chip I need to read though ^^^^

ok tried to read both chips, the bottom chip wouldnt do anything the vcc light comes on the progarmmer and then nothing. The top chip I managed to get a read from it but the 252k file is completely FFed out, tried to read it again and now I am just getting the same as the bottom chip ie VCC light comes on and then nothing.... any help please guys?

Why on earth would you have a 252k readout?

You are probably selecting the wrong chip type. These chips are all smaller than 8k.
Let's hope the chips are not damaged/erased now.

I selected the 24c02 device, sorry its not 252k the size of the FFed read was 4.0K

surely just trying to read the file wouldnt have damaged/erased the chip?

And you are sure your chip is 24c02?
If you have the chip wired incorrectly or select the wrong chip, you can easily reverse polarity on VCC and VSS and fry it.

well no I am not sure thats why I asked for help further up but to no avail, I have posted as much info as possible and would love some help!

If I remember correctly, the 906/907 series had 95c40. And for that I'd use UPA.

Thanks for the help, I dont see any devices under my gq-4x for that chip 95c40?

Err, it has 2 names, one of which is actually 25c40.

Should note, for future reference: 24, 25 and 95 are all the same series with the same pinouts (unless reversed, and you don't need to worry about this).


Looked in GQ, and it lists it as a "25c040".

again thank you for the help, my last question in the pictures above could you tell me whether its the chip on the top of the board or the bottom?

Thank you Thank you Thank you, OK I managed to get a 2nd read from the chip on the top of the board which I have attached please can someone confirm whether this is the correct read?

Corrupt read.

what would a corrupt read mean? Am I using the wrong chip? Did I stuff the contents of the chip up by trying other chip types in my gq?

Content is ~junk and the size is wrong.

Yea, it's corrupted inside out.