Samsung Galaxy Tab 10.1 external microSD project

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Hi, several of we GT 10.1" tab owners over in the tab specific area are looking into adding a external micro SD to our tabs. I am hoping that we might find some more expertise and input in this section of the forum.

The ongoing thread we are discussing the mod in can be found here: http://forum.xda-developers.com/show....php?t=1600661, but hopefully we can merge the threads, or somehow keep things straight, but it seems this may be the more appropriate forum section.

Brief recap is that it appears the early/pre-release GT-P7500 had an external SD card. My later model GT-P7510 has the associated area on the MOBO unpopulated. I found the connectors, the OP in the thread found the factory SD card holders. I used my tab for a test, soldered the the connector on, and early indications are it is not functioning. So far I haven't been able to dig back into it, but common consensus is that the unpopulated area near the SD reader connector is needed. I have a lot of experience with simpler analog electronics, and analog design, but to repopulate the needed components with no idea of where to start is beyond the scope of my abilities.

We have the GT-P7500 service manual, at least most of it I think. The MOBO photos in the manual show the area populated, but the photos are to low resolution to gain any useful data. I found some supposedly leaked FCC photos of the tab disassembled pre-release. It also shows the SD card area populated, and this one shows the SD card holder as well, but again low resolution.

Currently we are hoping that maybe the very early HW revisions of the 3g GT-p7500 may have had the SD card area populated, and possibly one of you owners could help us.

If anyone has any input, or can help build the circuit from the ground up I am happy to provide any testing/data/pinouts I can.

On a side note-- does anyone know how many times I can disassemble my tab without ruining the case?

Thanks in advance folks!

Jason Campbell

In addition to any missing components, you need to figure out which SDHCI interface of the CPU that is hung off of and add it to the platdata:

https://github.com/pershoot/galaxy-2...i-sdhci.c#L296

Looks like 3 is the internal eMMC, 0 is the wifi chip (BCM4329 and 4330 are SDIO wifi chipsets), 1 and 2 are not used.

I too have been toying around with this idea. Looks like I'm not alone in thinking this tab would rock with a microsd. Only you guys are way farther ahead than me! Also I know for a fact that the gtab 10.1 v2 that's coming out sometime this year will have an SD slot. And it looks like little else that's different. Maybe when one of us gets our hands on it we can see on the inside where things are populated or not.

Sent from my GT-P7510 using xda premium

Originally Posted by Hipcatjack

I too have been toying around with this idea. Looks like I'm not alone in thinking this tab would rock with a microsd. Only you guys are way farther ahead than me! Also I know for a fact that the gtab 10.1 v2 that's coming out sometime this year will have an SD slot. And it looks like little else that's different. Maybe when one of us gets our hands on it we can see on the inside where things are populated or not.

Sent from my GT-P7510 using xda premium

Turns out that you're most likely wrong on this - all evidence (including the recent source release I believe) indicates the Tab2 10.1 will be OMAP4-based just like the Tab2 7.0 is.

interesting thanks

Looks like I will finally have some free time to open my tab up again. I plan to ring out the SD card holder to the connector, and then on out from there. I will go at least as far as the unpop area if that is indeed where it leads. While I have it open, do you folks have any suggestions as to other testing or mapping to do? I appreciate the input so far-- I don't really know much about the software side, but we can burn that bridge if/when we get there. Will keep you all posted.

Later,
Jason

Sent from my GT-P7510 using Tapatalk 2

Hi! Do you know that if you add a sd-card extension, you must develop new drivers and kernels? And this could probably make you lose your warranty...

SD card

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why do manufactures insist on leaving sd card slots off the build? doesnt seem like it would cost to much include one.

thanks for this

Hi,

My friend has a 10.1 GT 7500,
He bought an external adapter for sdcard.

Perhaps you can use the layout schemas from such a device to discover what you need to make it work internally.

Its probaply the same "signal wires" but now abvailable on the external connector.


Hope this helps/.