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wulagrass



Joined: 17 Jun 2015
Posts: 42


PostPosted: Mon Jul 11, 2022 8:43    Post subject: New NAND need support
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The latest version of NAND READER cannot read this NAND.

We have used the power board and it does not recognize the NAND ID in the NAND READER.

All information is in the attached image file

Downlaod NAND PDF:https://pan.baidu.com/s/1nc3i58sIbPsryoxM82s3PA?pwd=dpl7
Pass:dpl7
a62b248e76278629a04e25cb1101f1a.png
1.jpg
jeremyb



Joined: 09 Dec 2008
Posts: 1825
Location: RecoverMyFlashDrive.com Bridgeport, CT, USA

PostPosted: Mon Jul 11, 2022 18:14    Post subject:
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How did you get that datasheet?? Thank you very very much.. I've been seeing this on MicroSD cards for a while.

The problem is the VccQ Operating voltage is 1.2v, NR's logic shifters can only read down to 1.8v.

I developed a special adapter card to read these chips down to 0.7v. Unfortunately due to the semiconductor shortage these chips are no longer available.

I can read the chip if its critical.
Capture.JPG
Сергей



Joined: 26 Aug 2005
Posts: 19575

Flash-Extractor developer

PostPosted: Mon Jul 11, 2022 21:08    Post subject:
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Thanks for datasheet!

VCCQ and VCC voltages do not overlap
NR have only 1 voltage
So, we can not read it

Need use custom socket with 2 voltages

Also i read in ONFI that if chip use 1.2v, then it use NV_DDR mode
In wich NAND_Reader can not use Read Retry commands
wulagrass



Joined: 17 Jun 2015
Posts: 42


PostPosted: Thu Jul 14, 2022 9:48    Post subject:
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OK,Thank you.

That is, we now only need to supply the correct voltage to the NAND to enable the NR to read the chip ID and data correctly.

This is relatively easy to do, so I'll try it first.
jeremyb



Joined: 09 Dec 2008
Posts: 1825
Location: RecoverMyFlashDrive.com Bridgeport, CT, USA

PostPosted: Thu Jul 14, 2022 20:02    Post subject:
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wulagrass wrote:
OK,Thank you.

That is, we now only need to supply the correct voltage to the NAND to enable the NR to read the chip ID and data correctly.

This is relatively easy to do, so I'll try it first.


It's easy, but not so easy.
NR's logic is 3.3v, NAND is 1.2v
Without level shifters NR won't recognize the signals.

It's not impossible to read but you'll either need to design a new adapter or modify the existing voltage adapter in a way that Vcc and VccQ are not hardwired together. (cut and green wire traces)

Сергей wrote:
Also i read in ONFI that if chip use 1.2v, then it use NV_DDR mode
In wich NAND_Reader can not use Read Retry commands

I'm guessing you can still read the chip... I think this case is similar which didn't require NV_DDR:
http://flash-extractor.com/library/Monolith/Micro%20SD/Part%203/Monolith%20Micro%20SD_48__2c_2c_d3_1c__1x1
Сергей



Joined: 26 Aug 2005
Posts: 19575

Flash-Extractor developer

PostPosted: Mon Jul 18, 2022 17:04    Post subject:
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jeremyb wrote:
I'm guessing you can still read the chip

But ECC map will not be 100% green
jeremyb



Joined: 09 Dec 2008
Posts: 1825
Location: RecoverMyFlashDrive.com Bridgeport, CT, USA

PostPosted: Mon Jul 25, 2022 20:23    Post subject:
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Just throwing it out there because 2c d3 89 32 is a similar ID...
I got another case (UFD FC controller this time NOT MicroSD) with 2c 2c d3 1c c6 NAND (technically its 2c d3 1c 6c) but RE is very slightly out of sync with DATA on the first ID byte (DQS is in sync), maybe because it's DDR on bootup?

Same story, its readable but only at 1.5v

ONFI
Header 4f 4e 46 49 
 
Manufacturer: MICRON
Name: MT29F1T08GBLBE3W
 
Page: 18592
 
Block: 0x1200
Blocks: 0x7b0
LUNs: 1
 
Col: 2
Row: 3
 
Bits per cell: 4
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