Hardware Hacking Switch OLED 256gb NAND upgrade

[chappo]

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[zal16]

and there I go to do another memory upgrade

 

[Flaviocarvalho]

Please...anyone can mark on the picture below the points (pads) that are absokutly needed for the switch to work? I have a emmc with few broken pads and want to know if worth the reballing. If anyone can mark for me the absolut necessary i apreciate

 

[Johnny_debt]

Please...anyone can mark on the picture below the points (pads) that are absokutly needed for the switch to work? I have a emmc with few broken pads and want to know if worth the reballing. If anyone can mark for me the absolut necessary i apreciate

You'll need all those except for RFU for it to fully function. But I think if you're missing DAT lines it will go into slow mode.

 

[Flaviocarvalho]

You'll need all those except for RFU for it to fully function. But I think if you're missing DAT lines it will go into slow mode.

Even if they have the same function? For example....i see a lot of vdd pins

 

[Johnny_debt]

Even if they have the same function? For example....i see a lot of vdd pins

VDD is interconnected on the mainboard, so is VDDF. However I'm not sure if they are interconnected on the emmc chip. Did you lose the pads on the emmc chip or on the mainboard?

 

[chappo]

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[doom95]

the pads that are most likely to lift are the ones without traces attached, i.e. the ones which are of no consequence when lost

 

[Flaviocarvalho]

VDD is interconnected on the mainboard, so is VDDF. However I'm not sure if they are interconnected on the emmc chip. Did you lose the pads on the emmc chip or on the mainboard?

On the emmc

Post automatically merged: Jun 4, 2023

Send pic from your broken emmc and mark the defective pins.
I can say what's needed.
I recommend to dump it externally.

One of them im sure its broken...the other ones i dont know...the first picture shows the entire emmc...the second show the points i dont know if is broken

 

[Johnny_debt]

It's hard to tell from your close up pictures. The picture with the whole eMMC in view don't appear to be losing any pads except for the one next to the index pin (looks darkened). I think this is a NC pad. You can try scraping that pad lightly with a tweezer to see if it is truly gone. Sometimes they appear gone but it's just covered in a thin film.

 

[chappo]

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[Flaviocarvalho]

Hmm hard to see, best is you mark the broken pins on the emmc pinout picture.
It could be also corrosion and it looks like a ripped pad.

I reballed...these pins did not soldered...i think if i put the solder ball on it it will solder but i dont wanna stress the emmc with heat....and none of them is marked wjth nothing so i think its NC. Do you think i can leave it whitout the balls or worth try to reball then?

 

[chappo]

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[zal16]

I'm looking rn to get those chips
I'll update this post every time I find a supplier.

Spoiler: Some more information

It seems there is another manufacturer for 512gb emmc Chips.
https://namu.wiki/w/eMMC
View attachment 371367

https://www.symmetryelectronics.com/products/silicon-motion/sm662pbf-bess/

New emmc manufacturer for 512gb emmc
https://estore.flexxon.com/products/emmc-5-1-153ball-axo?variant=44197847531707

Another player entered on the select 512GB eMMC group. The MICRON!

With model MTFC64GAZAQHD-AIT

https://www.micron.com/products/managed-nand/emmc/part-catalog/mtfc64gaxaqea-wt


I definitivelly buy then if available!!!!!

Edit: False alarm guys, the Micron's site is listing erroneuosly a 64GB chip (512Gbit)

 

[FR0ZN]

Another player entered on the select 512GB eMMC group. The MICRON!

With model MTFC64GAZAQHD-AIT

https://www.micron.com/products/managed-nand/emmc/part-catalog/mtfc64gaxaqea-wt


I definitivelly buy then if available!!!!!

Edit: False alarm guys, the Micron's site is listing erroneuosly a 64GB chip (512Gbit)

MTFC64GAXAQEA-WT is what you ars looking for.

 

[chappo]

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[Hassal]

It's a 64gb emmc chip
The 512 are GBits

No that's 512GB alright. I think that's the only flash with parallel interface on this capacity

 

[Nephiel]

No that's 512GB alright. I think that's the only flash with parallel interface on this capacity

It is 512Gbit = 64GByte. The size is also in the product code: MTFC64GAXAQEA.

From the available datasheets, there is no 512GByte variant available in that range.

 

[Hassal]

It is 512Gbit = 64GByte. The size is also in the product code: MTFC64GAXAQEA.

From the available datasheets, there is no 512GByte variant available in that range.

Density is written 512GB which is not what you're alluding to. You cannot have 64GB in your part number and have 512GB density.

From micron pages you can clearly see it written as capital B as in Bytes not bits to be consistent with the rest.

Though after thinking more about it I believe there's an error perhaps 512GB was a mistake. No way to find out until these micron b!tches open up their datasheets to the public not just their business partners.

 

[chappo]

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