What Chip is THis

[ddrecovery]

This is from a 64GB Sandisk Cruzer, but the chip ID has been removed from the from of the chip. Its not BGA or TLGA 152... or is it.....? Still learning this stuff.

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[ddrecovery]

Seems like its the same as Hynix H2JTDG8UD2MBR a VLGA chip, but still not sure how to read it.

[HaQue]

Hi, Could you post a pic of both sides of the PCB of the flash drive? one way is to map the pads on the PCB with a continuity meter back to the controller pins. look on sites like flashboot.ru for a controller schematic for the nand signals.

is it an Alcor controller?

possibly this chip is NAND+DDR RAM, refurbished to just use the nand side of it.

to track it down, you would measure the chip with vernier calipers to get an exact size LxWxH and count the BGA balls. Also measure between 2 pads, this is called the pitch.. for example, TSOP48 has 0.5mm pitch, measured between the centres of 2 adjacent pins.. use these details to trawl the net for any clues, following any links to build up your hits of info.

[ddrecovery]

The controller is a Sandisk 82-00523-5. Couple of images attached.

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[HaQue]

thanks for the pictures, very interesting.

edit, looks like it is LGA60: http://www.algomtl.com/-ipad-iphone4-inand-lga52-lga60-959332.html
http://flash-extractor.com/forum/viewtopic.php?t=8274&start=0&postdays=0&postorder=asc&highlight=

maybe the onfi or jedec standards have something? I don't have time to look

[HaQue]

you can get the controller number, then I can look for a flash drive with same controller but tsop48 nand, and match the tsop signals to the controller, then we know which controller pins are what, then backtrack to your LGA60 to map the pads.

[ddrecovery]

one other request: whats the sandisk controller number? you can get the controller number, then I can look for a flash drive with same controller but tsop48 nand, and match the tsop signals to the controller, then we know which controller pins are what, then backtrack to your LGA60 to map the pads.

The controller is a Sandisk 82-00523-5. Thanks for the help

[HaQue]

My research list shows I have 2 devices with that controller + tsop chips, so when I get time I can map the signals to the controller for you. Once you know what they are on the controller you should be able to put your multimeter on short-test-beep, place one probe from the multimeter on the controller pin and test each pad to see what it lines up with.

[ddrecovery]

My research list shows I have 2 devices with that controller + tsop chips, so when I get time I can map the signals to the controller for you. Once you know what they are on the controller you should be able to put your multimeter on short-test-beep, place one probe from the multimeter on the controller pin and test each pad to see what it lines up with.

You are a good man

[ddrecovery]

Just got hold of this. Seems like the pinout for this chip. However I am used to using the templates provided by AceLabs and Rusolut for monoliths where connections to the adapter are pretty obvious (D1, VCC etc etc). However with this pinout there are 5 x VccQ, 5 x VssQ and also references such as RE-1 and /RE-1. Can you point me in the right direction? Thanks again for your help.

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[HaQue]

usually all the VCCQ are connected internally - test with a continuity meter and if so, you only need to connect to 1 of them.

the RE and /RE is just that some circuits may want to use the negate of a signal, so whenever you poll /RE it will be the opposite of RE. in our case I think we can ignore /RE and just use RE.

looks like 2 Die on the chip, read xx-0 as one dump and xx-1 ([signal]-[die])as the second dump. vcc is the device power probably 3.3v, vccq is the I/O voltage, probably 3.3 or 1.8 (usually 3.3v is fine), vss is gnd and vss is I/O gnd.

[ddrecovery]

usually all the VCCQ are connected internally - test with a continuity meter and if so, you only need to connect to 1 of them.

the RE and /RE is just that some circuits may want to use the negate of a signal, so whenever you poll /RE it will be the opposite of RE. in our case I think we can ignore /RE and just use RE.

looks like 2 Die on the chip, read xx-0 as one dump and xx-1 ([signal]-[die])as the second dump. vcc is the device power probably 3.3v, vccq is the I/O voltage, probably 3.3 or 1.8 (usually 3.3v is fine), vss is gnd and vss is I/O gnd.

Cool thanks

[jeremyb]

Heads up you may get a poor read from the chip.

[ddrecovery]

Heads up you may get a poor read from the chip.

After talking to Rusolut, they say the chip can usually be read in a TLGA-52 adapter. After quite a bit of juggling (its a smaller chip than the adapter) I can get it to ID, but the ID is not recognized (maybe not surprising with this chip). Hopefully Rusolut will sign in overnight and work some magic. But jeremyb you might be right. I guess you've had experience with this chip??

[HaQue]

what is the ID?

[ddrecovery]

VNR can tell its two crystals which is a good sign. It ID's them as 50504FFFF.

[jeremyb]

VNR can tell its two crystals which is a good sign. It ID's them as 50504FFFF.

Yes, I've worked with them a few times before and that's the wrong ID..
Besides it's invalid it has the wrong number of characters

[HaQue]

very unusual for sandisk to remove the chip markings.. under good light and magnification is there any markings at all?

[jeremyb]

very unusual for sandisk to remove the chip markings.. under good light and magnification is there any markings at all?

Not sure why there is so much confusion. This is a Toshiba (?? or reprogramed as SanDisk in this case ??) NAND chip. Kingston uses them all the time with Phison controllers. They're pretty standard. Somebody is doing something wrong if they can't read this chip easily. That said you have to play around with the settings to get a perfect read but it's possible.

Just wondering, this drive doesn't use a PPTC, did you take that into account before trying to do an off chip recovery.. It might save you a lot of grief.

[HaQue]

It is obviously his first time dealing with this chip, so "playing around" isn't going to help him that much, unless he had experience with what to play around with....