Database Develop

Nexus 7 Teardown

Nexus 7 Teardown @ ifixit
Here she is, the motherboard:
NVIDIA T30L Tegra 3 processor
Hynix HTC2G83CFR DDR3 RAM
Max 77612A inverting switching regulator
AzureWave AW-NH665 wireless module
Broadcom BCM4751 integrated monolithic GPS receiver
NXP 65N04
Invensense MPU-6050 gyro and accelerometer
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Wow. For some reason I thought there would be more stuff....Or that some things would be bigger. :/
EDIT: Nevermind. It just doesn't look like much when it's all out like that.

What does this mean exactly?
Although the official Nexus page says there's a speaker in the back, we clearly see a pair of drivers.
Drivers? No Speaker?

Atmazzz said:
What does this mean exactly?
Although the official Nexus page says there's a speaker in the back, we clearly see a pair of drivers.
Drivers? No Speaker?
Click to expand...
Click to collapse
I'm not sure. They're referring to the two black rectangular mesh/screen objects towards the bottom. I'm guessing they mean a type of electrostatic transducer?

Well that's it then, no more speculation regarding MHL.
No sight of any MHL chip/transmitter on the motherboard, and the demo unit on stage at Google I/O was indeed a custom one that either uses micro USB to VGA adapter or Nexus Q to mirror its screen.
Edit: Wait, but there is a micro USB to HDMI cable, I'm confused
Doesn't it require hardware support for MHL to work.

Nice to know it includes DDR3 RAM, apparatly the same model found in the 'MacBook Pro with Retina Display'.
Also Page 1 - Step 2 states
Initially, the Nexus 7 was criticized for its lack of HDMI output. However, the included micro USB-to-HDMI cable solves that problem.
Including this picture
Time to celebrate?

xthaox said:
Well that's it then, no more speculation regarding MHL.
No sight of any MHL chip/transmitter on the motherboard, and the demo unit on stage at Google I/O was indeed a custom one that either uses micro USB to VGA adapter or Nexus Q to mirror its screen.
Click to expand...
Click to collapse
In step 2 of the teardown there is a picture of the cable and they state "Initially, the Nexus 7 was criticized for its lack of HDMI output. However, the included micro USB-to-HDMI cable solves that problem."
Will the retail ones be the same as their white backed Google I/O attendee version though...

Thanks for sharing, I've been waiting for someone to break the Nexus 7 down.
Sent from my HTC Sensation 4G using xda premium

Big_Den said:
Nice to know it includes DDR3 RAM, apparatly the same model found in the 'MacBook Pro with Retina Display'.
Also Page 1 - Step 2 states
Initially, the Nexus 7 was criticized for its lack of HDMI output. However, the included micro USB-to-HDMI cable solves that problem.
Including this picture
Time to celebrate?
Click to expand...
Click to collapse
Surely not.. but would be funny if true..

Big_Den said:
Time to celebrate?
Click to expand...
Click to collapse
Looks promising!

ebwibble said:
In step 2 of the teardown there is a picture of the cable and they state "Initially, the Nexus 7 was criticized for its lack of HDMI output. However, the included micro USB-to-HDMI cable solves that problem."
Will the retail ones be the same as their white backed Google I/O attendee version though...
Click to expand...
Click to collapse
That's why I'm confused. How does it work without any MHL transmitter on board?
How come no other reviews mentioned the inclusion of this micro USB to HDMI cable, both the AnandTech and Engadget reviews say N7 do not support MHL. They surely must have been reviewing the same unit given out for I/O attendees. I hope ifixit test if the cable even work, was it a mistake that the cable is included in their box?

xthaox said:
That's why I'm confused. How does it work without any MHL transmitter on board?
How come no other reviews mentioned the inclusion of this micro USB to HDMI cable, both the AnandTech and Engadget reviews say N7 do not support MHL. They surely must have been reviewing the same unit given out for I/O attendees. I hope ifixit test if the cable even work, was it a mistake that the cable is included in their box?
Click to expand...
Click to collapse
Yeah. Why is ifixit the only one who makes note of this. It doesn't make sense.

Yeah it does look promising. Even if it doesnt include a cable in the box, I would hope you will be able to purchase it separately. It still quite funny we dont have any concrete information :laugh:

That looks like the PC connection cable. Note the regular USB male connector, and what looks like micro-USB male connector on the other end, despite what the HDMI label says.
If this were an adapter, the HDMI connector would normally be female, to be used with regular HDMI male-male cable.

xthaox said:
That's why I'm confused. How does it work without any MHL transmitter on board?
How come no other reviews mentioned the inclusion of this micro USB to HDMI cable, both the AnandTech and Engadget reviews say N7 do not support MHL. They surely must have been reviewing the same unit given out for I/O attendees. I hope ifixit test if the cable even work, was it a mistake that the cable is included in their box?
Click to expand...
Click to collapse
Whilst I think it is a mistake by iFixit, I am wondering about the technical side of things, does Tegra 3 not have any MHL stuff in it?

e.mote said:
That looks like the PC connection cable. Note the regular USB male connector, and what looks like micro-USB male connector on the other end, despite what the HDMI label says.
If this were an adapter, the HDMI connector would normally be female, to be used with regular HDMI male-male cable.
Click to expand...
Click to collapse
To me it looks like a microusb male connection on one end (to be plugged into the Nexus) and a full size HDMI male connection on the other end (to be plugged into a TV or receiver).

e.mote said:
That looks like the PC connection cable. Note the regular USB male connector, and what looks like micro-USB male connector on the other end, despite what the HDMI label says.
If this were an adapter, the HDMI connector would normally be female, to be used with regular HDMI male-male cable.
Click to expand...
Click to collapse
I thought with the dent on its side, it looks more like a micro-USB male connector, and on the other end with HDMI label, it also looks like a HDMI male connector, considering its relative size to the micro-USB end.

>To me it looks like a microusb male connection on one end (to be plugged into the Nexus) and a full size HDMI male connection on the other end
You're probably right. Anyway, below is the cable that normally comes with the I/O package. There is no other cable in the unboxing.
http://www.technobuffalo.com/compan...low-price/attachment/google-galaxy-7-charger/

What's with the HDMI cable reference in there? Thought it didn't have MHL or anything
Plus the smaller connector with the wide RIM looks like one of the cables you'd plug into the Q
EDIT: I'm not really convinced that it is a HDMI male connector

Slap-Yourself :) said:
I'm not sure. They're referring to the two black rectangular mesh/screen objects towards the bottom. I'm guessing they mean a type of electrostatic transducer?
Click to expand...
Click to collapse
This is how someone else explained it to me.
NeoteriX said:
By stereo speakers, I basically mean there are two drivers (speakers, same thing), one for the right channel audio, and one for the left channel audio.
As a practical matter however, the stereo effect will be nil or negligible because 1) there is almost no stereo separation (distance between speakers), and 2) when held in landscape, both channels will be only coming from one side.
Click to expand...
Click to collapse

Nexus 7 POGO GPIO PINS on Side

So similar to what was found on the Samsung Galaxy Nexus, does anyone know where the source file exists that explains what the 4 POGO pins on the left side of the Nexus 7 are for? I cannot figure them out with my multimeter or oscilloscope.
Samsung Galaxy POGO thread: http://forum.xda-developers.com/showthread.php?t=1614287
File on Samsung Galaxy Nexus was board-tuna-pogo.c but that is obviously not on the Nexus 7 because it is made by Asus and I assume they had a different file.
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Close up of the POGO insternals from ifixit.com:

My assumption is that there will be a dock of some sort that will be using those contacts.
I make this assumption from my old Nexus One where they also had contacts similar for charging.

I'm not entirely sure, but one of the pins could be for charging and another for ground. And possibly the other two are for audio out.
Just a guess lol
Sent from my HTC One X using xda app-developers app

Since there are 4 pins, I get the feeling it could be USB? 2 for data + 2 for power and since now Android has support for USB audio it wouldn't matter? I just wonder how you could do power and stereo audio since you would need a ground + 2 for audio and 2 for power...

tomascivinod said:
Since there are 4 pins, I get the feeling it could be USB? 2 for data + 2 for power and since now Android has support for USB audio it wouldn't matter? I just wonder how you could do power and stereo audio since you would need a ground + 2 for audio and 2 for power...
Click to expand...
Click to collapse
Nope, ground is ground. Could use the negative terminal for ground, so could be + l r -

One thing for sure, unlike the title of this topic, they are not GPIO pins.
My vote is for stereo audio, ground, and charging. Buy a dock from Asus and see.

rmm200 said:
One thing for sure, unlike the title of this topic, they are not GPIO pins.
My vote is for stereo audio, ground, and charging. Buy a dock from Asus and see.
Click to expand...
Click to collapse
If Asus had one available I would buy it!
That said, here is what I found so far...
Top Pin (1): Ground
2: ???
3: ???
4: Data (minus) ???
Tried hot glueing wires into the pogo ports to conduct more tests, but quickly realized it was easier to just pop the back off and wire them directly to the board itself.

Protip: apply 5V between your pin 1 and 4 and watch dmesg.

POGO connection product from ASUS
Here's the product that connects to the pins:
http://www.droid-life.com/2012/07/30/official-nexus-7-accessory-lineup-leaks-pogo-dock-incoming/
JB
peterpressure said:
So similar to what was found on the Samsung Galaxy Nexus, does anyone know where the source file exists that explains what the 4 POGO pins on the left side of the Nexus 7 are for? I cannot figure them out with my multimeter or oscilloscope.
Samsung Galaxy POGO thread: http://forum.xda-developers.com/showthread.php?t=1614287
File on Samsung Galaxy Nexus was board-tuna-pogo.c but that is obviously not on the Nexus 7 because it is made by Asus and I assume they had a different file.
Close up of the POGO insternals from ifixit.com:
Click to expand...
Click to collapse

jb7890 said:
Here's the product that connects to the pins
Click to expand...
Click to collapse
Well, I am hellbent on beating Asus to the punch!
pokey9000 said:
Protip: apply 5V between your pin 1 and 4 and watch dmesg.
Click to expand...
Click to collapse
Thank you for this tip! Great help.
I apply GND to pin 1 (top pin) and 5V to pin 4, dmesg (cat /proc/kmsg in Terminal Emulator) says the following upon +5volt insertion.
<4>[ 232.369780] INOK=L
<5>[ 232.370361] smb347_charger: [cable_type_detect] Reg3F : 0x03
<4>[ 232.370850] USBIN=0
<4>[ 232.371113] inok_isr_work_function -
When I remove +5volts it outputs the following:
<4>[ 241.459841] INOK=H
<4>[ 241.460260] ========================================================
<4>[ 241.460933] battery_callback usb_cable_state = 0
<4>[ 241.461296] ========================================================
<4>[ 241.461969] inok_isr_work_function -
But it never starts charging! ARGHHH!!!!

hmm im looking it my self i tryed 2 cables and i didnt work how ever i did im guna get a mutimeter cables and use the pins on that so see what it does

ryhamster said:
hmm im looking it my self i tryed 2 cables and i didnt work how ever i did im guna get a mutimeter cables and use the pins on that so see what it does
Click to expand...
Click to collapse
Wat?

dw mate

pokey9000 said:
Wat?
Click to expand...
Click to collapse
ryhamster said:
dw mate
Click to expand...
Click to collapse
Please do not clutter this thread with anything other than real findings related to the software or hardware involved with the POGO pins.
Ok, small update!
Turn the tablet off, and apply GND to Pin 1 (top pin) and +5Volts to Pin 4 (Bottom pin) and Voila!
IT IS CHARGING via the POGO pins! (but only when turned off)
When I turn the tablet on, it stops charging.
Pictures:

tinkering rox!
Anticipation! I hope you find out the details and are able to make something nice out of it.
My suggestion would be to make something small/slender, that could be adapted to any standard folio type case for the N7 which would allow it to "dock" without taking it out of the casing and use what ever features are available via the POGO.
GL!
-CC

Is it possible to see if the pins is routed anywhere on PCB?
What kind of hardware (text on chip etc) can be found close to pins?
Is there any direct connection to usb from the pins?
If possible, ohm measure would be interesting.

mippen said:
Is it possible to see if the pins is routed anywhere on PCB?
What kind of hardware (text on chip etc) can be found close to pins?
Is there any direct connection to usb from the pins?
If possible, ohm measure would be interesting.
Click to expand...
Click to collapse
The two middle pins don't have any of the voltages you'd need for USB host handshake. In fact they're high impedance at DC. I'm pretty sure they're AC coupled audio out.
---------- Post added at 12:56 PM ---------- Previous post was at 12:51 PM ----------
peterpressure said:
Ok, small update!
Turn the tablet off, and apply GND to Pin 1 (top pin) and +5Volts to Pin 4 (Bottom pin) and Voila!
IT IS CHARGING via the POGO pins! (but only when turned off)
When I turn the tablet on, it stops charging.
Click to expand...
Click to collapse
So the dock charging is implemented in the bootloader but not in the kernel. Expect an OS update around the time the dock is released.
BTW Bluetooth V2.0+EDR Audio Communications Module... Sounds fun

i got the same thing on the pogo pins only if its turned off but doesnt charge for long

clockcycle said:
My suggestion would be to make something small/slender, that could be adapted to any standard folio type case for the N7 which would allow it to "dock" without taking it out of the casing and use what ever features are available via the POGO.
Click to expand...
Click to collapse
Exactly!
mippen said:
Is it possible to see if the pins is routed anywhere on PCB?
What kind of hardware (text on chip etc) can be found close to pins?
Is there any direct connection to usb from the pins?
If possible, ohm measure would be interesting.
Click to expand...
Click to collapse
So this tablet is very easy to open. I kept looking inside but it is a multilayer PCB, so without further disassembly it would be hard to see.
I think we can figure it out via other means.
pokey9000 said:
The two middle pins don't have any of the voltages you'd need for USB host handshake. In fact they're high impedance at DC. I'm pretty sure they're AC coupled audio out.
Click to expand...
Click to collapse
How can I test this with a sound device?
pokey9000 said:
So the dock charging is implemented in the bootloader but not in the kernel. Expect an OS update around the time the dock is released.
Click to expand...
Click to collapse
I hope this is not the case! Seems ridiculous to require the user update the OS to use the dock, but who knows.
ryhamster said:
i got the same thing on the pogo pins only if its turned off but doesnt charge for long
Click to expand...
Click to collapse
I charged all the way from 0% to 100% via the pogo pins today (with the tablet off). Worked like a charm for me!

peterpressure said:
How can I test this with a sound device?
Click to expand...
Click to collapse
The simplest test, assuming there is no detection going on to enable those pins (they're always enabled): Take any amplifier with a set of speakers, turn its volume all the way down, and turn it off. Run a wire from one of those supposed audio pins to a right or left input on the amp. Run another wire from the output/ground on that terminal to ground. Turn the amp on. Play sound on the tablet and gradually turn the volume up.
If the sound is reproduced by the amp, they're enabled and functional. If not, the tablet may need to be fully docked and receiving power before it enables the audio pins.

MHL

I was thinking about this cable in link below
http://www.maplin.co.uk/mhl-adaptor-cable-mhl-jack-to-hdmi-and-micro-usb-636712#
but will i be able to full utilize capabilites of this cable (like multi channel audio? since i do have few mkv(3.0gb) files in my xperia S but it always pass stereo nothing more than that no dolbydigital or DTS even on my HT-AS5 since m2ts are too big!
THX in advance

First of all, the question your asking, I don't know.
Anyway,
Doesn't this thing do the same thing? It costs less.
>> CLICK <<

full utilize capabilites of this cable?
Will xperia Z be able to play Dolby digital or DTS ?

Multichannel audio passthrough for HDMI/MHL is currently not supported on any smartphone at all. Sorry!

Can anyone tell me if an 11 pin adapter the galaxy s3 uses will work with the Xperia z? Seen a few of those on eBay reasonably priced.

DANCERDAVIES said:
Can anyone tell me if an 11 pin adapter the galaxy s3 uses will work with the Xperia z? Seen a few of those on eBay reasonably priced.
Click to expand...
Click to collapse
Should do. If you watch the clove connectivity video on youtube, they use a Samsung usb host cable and mhl I think...
Sent from my GT-I9100 using xda app-developers app

DANCERDAVIES said:
Can anyone tell me if an 11 pin adapter the galaxy s3 uses will work with the Xperia z? Seen a few of those on eBay reasonably priced.
Click to expand...
Click to collapse
The XT uses 5 pin MHL cable I'd imagine the XZ will use the 11 pin MHL but I can't seem to find any confirmation on line, I have a 5 pin MHL cable which I was wrongly sent but have a 5-11 pin adapter anyway....so I believe you will be fine

maverick1103 said:
The XT uses 5 pin MHL cable I'd imagine the XZ will use the 11 pin MHL but I can't seem to find any confirmation on line, I have a 5 pin MHL cable which I was wrongly sent but have a 5-11 pin adapter anyway....so I believe you will be fine
Click to expand...
Click to collapse
http://www.youtube.com/watch?v=RHa56Dm2j_8
On Clove video, it says we need to use MHL adapter used for Samsung Galexy S2 and Note.
MHL adapter used with S3 and Note2 will not work.
Hence I think xperia Z uses 5 pin MHL instead of 11 pin.

jigarpatel22 said:
http://www.youtube.com/watch?v=RHa56Dm2j_8
On Clove video, it says we need to use MHL adapter used for Samsung Galexy S2 and Note.
MHL adapter used with S3 and Note2 will not work.
Hence I think xperia Z uses 5 pin MHL instead of 11 pin.
Click to expand...
Click to collapse
Oh really, that's kinda weird as most 2012/2013 phones are using 11 pin mhl, it's no issue for me as previously said... Just find it weird Sony would use old tech if you know what I mean.
Sent from my GT-N7100 using Tapatalk 2

Which mhl charges at the same time as displays the image on the tv?
This was mentioned by Sony.
Or do they all do that
Sent from my LT26i using Tapatalk 2

DarkKrypt said:
Which mhl charges at the same time as displays the image on the tv?
This was mentioned by Sony.
Or do they all do that
Sent from my LT26i using Tapatalk 2
Click to expand...
Click to collapse
As far as I know, all of them do that.
Sent from my GT-N7000 using Tapatalk 2

maverick1103 said:
Oh really, that's kinda weird as most 2012/2013 phones are using 11 pin mhl, it's no issue for me as previously said... Just find it weird Sony would use old tech if you know what I mean.
Sent from my GT-N7100 using Tapatalk 2
Click to expand...
Click to collapse
It's really confusing, if anyone knows the answers, please share...
11 pin or 5 pin fox Xperia Z and what's the difference?
Does the MHL to HDMI adapter need to charge while outputting?
I heared they do need to charge otherwise they don't work...
Is the phone still loosing power while outputting?
Heard so from some sources...
Are there quality differences or other differentiating standards among the adapters?

redThd said:
It's really confusing, if anyone knows the answers, please share...
11 pin or 5 pin fox Xperia Z and what's the difference?
Does the MHL to HDMI adapter need to charge while outputting?
I heared they do need to charge otherwise they don't work...
Is the phone still loosing power while outputting?
Heard so from some sources...
Are there quality differences or other differentiating standards among the adapters?
Click to expand...
Click to collapse
I will post my findings Friday about which pin the XZ uses... As for charging that is correct you will need it to be on charge otherwise it doesn't work. I've never experienced phone losing power with my Note 2, I'd imagine if you were playing high end games maybe that could happen, not sure.
Sent from my GT-N7100 using Tapatalk 2

I got this mhl cable with a screen I bought, no adapter though, just a plain cable. I tried connecting it to my screen but my Z just shows the MHL logo in the notification bar and nothing happens, do i have to enable anything?

What tv have you got?
Have you plugged in other smartphones or tablets via mhl or micro hdmi onto the same tv?
Sent from my LT26i using Tapatalk 2

DarkKrypt said:
What tv have you got?
Have you plugged in other smartphones or tablets via mhl or micro hdmi onto the same tv?
Sent from my LT26i using Tapatalk 2
Click to expand...
Click to collapse
Tried it on a KDL-55HX820 and a KDL-40W5500 , i don't have any other smartphones or tablets who support MHL though (i think). Please note this is just a cable, without a charger or anything.
I'm also getting an error when connecting to KDL-55HX820, and this is definitely a HDCP capable screen.
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I just tried this one and it works great, also TV launcher appear without any problem.
the one I used is the copy one though.

shaoran_ojo said:
I just tried this one and it works great, also TV launcher appear without any problem.
the one I used is the copy one though.
Click to expand...
Click to collapse
How many pins does this one have?
Also have you try to stream full HD movies with that thing? Was that pleasant?
Regards.

^^^ All MHL working like this, charge while send HDMI signal in the same time...
the only difference between 5 and 11 pins MHL's is that with the 11 pins MHL you can use both the HDMI and also connect a USB device ( like a mouse or controller ) to the device... with the 5 pins, you can't, USB or HDMI... if you want a mouse, keyboard or a controller go for bluetooth...
for Short
5 pins MHL
- HDMI output
- Charging
11 pins MHL
- HDMI output
- USB OTG functionality
- Charging
all Xperia's uses only 5 pins MHL, and the 11 pins MHL is not compatible with 5 pins, so you can't use S3 or Note 2 MHL adapter with any Xperia ( or even with other 5 pins MHL Samsung devices like Galaxy S2 )...
BTW, AFAIK the 11 pins MHL is not a standard approved by MHL consortium, while the MHL standard does not have a standard plug and you can't use whatever plug you want, the current standard implementation of MHL only uses MHL signal over standard 5 pins USB plug... it's the most wildly used implementation now...
If you remember the older Docks used to have both USB and HDMI ports in the back side, the Sony updated that dock to remove the USB port, that's because you can't use both ports in the same time with the 5 pins implementation of MHL...
Theoretically If Sony still have the microHDMI then they will be able to have this HDMI + USB OTG + Charging at the same time as the microHDMI has more pin counts ( 19 pins ) so it will be enough for all these things, but microHDMI is not physically compatible with microUSB so they can't use it alone and will require special cable ... and it's hard to have both plugs after they got rid from the microHDMI in 2011 devices... thought it was very nice as there was no need for an MHL adapter !!

shaoran_ojo said:
I just tried this one and it works great, also TV launcher appear without any problem.
the one I used is the copy one though.
Click to expand...
Click to collapse
I bought other one and works fine but the phone is slower, not very slow but slower. It is easy to check it when you run a modern game . And I can't use the mhl cable without connect it to the power one.
Are these issues normal?
Thank you.

[Review] Tronsmart USB C - USB A 6ft cable & USB C - Micro USB adapter

For almost two weeks now I have been testing out a USB C - USB A 6 foot cable and USB C - Micro USB adapter from Tronsmart. They sent me these products in return for an honest review.
To get links out of the way, here they are.
The cable:
http://www.amazon.com/gp/product/B018S348RG
The adapter:
http://www.amazon.com/dp/B018S827GU
First off, we're going to test and see if the products are compliant to the USB C standard and include the 56k resistor that it is advertised to have.
For the Nexus 5X from an adb shell we run the command "cat /sys/bus/i2c/drivers/fusb301/*/fclientcur".
These are the results we are looking for.
0 - standard USB charging (good)
1500 - 1.5 amp type C charging (good)
3000 - 3 amp type C charging (bad)
I am testing these with my laptop and not from a terminal on the phone itself, so we will be looking for an output of 0.
Adapter:
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"lightbox_close": "Close",
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_download": "Download",
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}
Cord:
OnePlus cable (not using the correct resistor):
Testing is good! These cables and adapters do adhere to the USB C standard, so you can use them without worry.
I won't include images of the cables, because they're just long cables. I will show, however, the size and fit of the adapter.
As you can see, it is just a little bit bigger than the end of most micro-USB cables. The male micro end does not plug all the way into the adapter, but I am sure it was designed that way in order to keep the overall footprint of the adapter as small as possible (and in my opinion was the way to go here). Most of you I imagine wouldn't care but some of you might not like the aesthetics of it.
Both the cables and adapters (which both come in packs of two by the way) are built very well. They all feel like they will last a long time as long as you don't abuse them. The actual feel of the cables themselves are identical to the cable that is bundled with the phone, but without the soft touch finish. The cables come as either 3.3 or 6 feet in length. I decided to pick the 6 footer as it is perfect to use if you charge your phone right next to you in bed like I do. They all charge quickly and and properly at whatever current your charger is rated to put out.
Overall, I would give the cords a solid 10/10 and the adapters a 9/10. I would recommend them to everybody, especially at their price. Buy!

Do you own a OTG cable with a microUSB end you could try with the adapter? The TECHmatte adapter I have doesn't work.
Sent from my Nexus 5X using Tapatalk

PiousInquisitor said:
Do you own a OTG cable with a microUSB end you could try with the adapter? The TECHmatte adapter I have doesn't work.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
Yes, that is what I tested it with. It's just a tiny footlong cable that came with an Anker battery pack.

dpwhitty11 said:
Yes, that is what I tested it with. It's just a tiny footlong cable that came with an Anker battery pack.
Click to expand...
Click to collapse
I guess you didn't understand what I asked. This is an OTG cable:
You can plug peripherals and other USB devices into it. Thumb drives for example.
The TECHmatte adapter works fine for charging and data transfer when used with a normal USB cable.
Sent from my Nexus 5X using Tapatalk

PiousInquisitor said:
I guess you didn't understand what I asked. This is an OTG cable:
You can plug peripherals and other USB devices into it. Thumb drives for example.
The TECHmatte adapter works fine for charging and data transfer when used with a normal USB cable.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
Oh. I feel dumb now, I know what those are... Just didn't read and process in my head the right way :silly:
I used to have one, but it broke on me a while back.

dpwhitty11 said:
Oh. I feel dumb now, I know what those are... Just didn't read and process in my head the right way :silly:
I used to have one, but it broke on me a while back.
Click to expand...
Click to collapse
Bummer.
Sent from my Nexus 5X using Tapatalk

PiousInquisitor said:
Bummer.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
I have similar adapter and tried using otg with micro usb cable. Sadly it didn't work. The type-c otg adapters have different pin configuration for the device to act as host AFAIK.
But I am able to use my micro usb chargers and data cables.

PiousInquisitor said:
I guess you didn't understand what I asked. This is an OTG cable:
You can plug peripherals and other USB devices into it. Thumb drives for example.
The TECHmatte adapter works fine for charging and data transfer when used with a normal USB cable.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
Do you have a link to the adapter you have? The TECHmatte?

dianestory2 said:
Do you have a link to the adapter you have? The TECHmatte?
Click to expand...
Click to collapse
http://www.amazon.com/gp/aw/d/B0151...=TECHmatte&dpPl=1&dpID=41TvPsO6cFL&ref=plSrch
Sent from my Nexus 5X using Tapatalk

USB OTG + Charge ?

I have had a Nexus 7 (first gen) installed in the dash of my vehicle in place of the factory double-din head unit for over three years now using Timur's kernel that allows the USB port to have OTG USB function and allows USB 5v 1.8amp charge draw at the same time; I have a powered USB hub with 2 channel audio DAC going to my amplifiers, USB 256gb SSD for library storage, USB Joycon board for steering wheel controls, and a few other doodads that make it all works nice and friendly.
I would love to try out a tablet like the Samsung Tab series instead of using the Nexus 2012/13, the 2012 is becoming too dated to run the latest media apps and the idea of having an SD card slot to throw a 200GB card in rather than using external USB storage to eliminate Android from spontaneously having to rebuild the media library will be great. Also, that amoled panel will look far better than the cheap LCD tech in the nexus tablets.
Anyone know if the Galaxy Tab s2 can support USB OTG + USB 5v 1.8-2.4amp charge input simultaneously or if there is a kernel modification available for it?
Thanks a lot!

stevey500 said:
I have had a Nexus 7 (first gen) installed in the dash of my vehicle in place of the factory double-din head unit for over three years now using Timur's kernel that allows the USB port to have OTG USB function and allows USB 5v 1.8amp charge draw at the same time; I have a powered USB hub with 2 channel audio DAC going to my amplifiers, USB 256gb SSD for library storage, USB Joycon board for steering wheel controls, and a few other doodads that make it all works nice and friendly.
I would love to try out a tablet like the Samsung Tab series instead of using the Nexus 2012/13, the 2012 is becoming too dated to run the latest media apps and the idea of having an SD card slot to throw a 200GB card in rather than using external USB storage to eliminate Android from spontaneously having to rebuild the media library will be great. Also, that amoled panel will look far better than the cheap LCD tech in the nexus tablets.
Anyone know if the Galaxy Tab s2 can support USB OTG + USB 5v 1.8-2.4amp charge input simultaneously or if there is a kernel modification available for it?
Thanks a lot!
Click to expand...
Click to collapse
Samsung tablets for sure can support OTG Host/Charge for a tablet and peripherals. Here is a list of supported tablets:
Samsung Galaxy Tab A (10.1″)***
Samsung Galaxy Tab S2 (8.0″, 9.7″)
Samsung Galaxy Tab E (9.6″)*
Samsung Galaxy Tab A (8.0″, 9.7″**)
Samsung Galaxy Tab 4 (8.0″, 10.1″)
Samsung Galaxy Tab S (8.4″, 10.5″)
Samsung Galaxy Tab Pro (10.1″, 12.2″)
You have to double check the firmware version that can be found here: lavalink.com/samsung-tablet-adapters-support/compatibility-list/. LAVA is the only manufacturer of adapters for Samsung tablets that allows that since Samsung doesn't sell anymore their hubs. These adapters will provide you enough power for the tablet and peripherals, and you can simultaneously access them. Plus, no tablet rooting is required so your warranty is save. Regarding, the SD card slot you have to double check which one offers it. Hope, that I helped a little bit. Good luck with your research!

Palima said:
Samsung tablets for sure can support OTG Host/Charge for a tablet and peripherals. Here is a list of supported tablets:
Samsung Galaxy Tab A (10.1″)***
Samsung Galaxy Tab S2 (8.0″, 9.7″)
Samsung Galaxy Tab E (9.6″)*
Samsung Galaxy Tab A (8.0″, 9.7″**)
Samsung Galaxy Tab 4 (8.0″, 10.1″)
Samsung Galaxy Tab S (8.4″, 10.5″)
Samsung Galaxy Tab Pro (10.1″, 12.2″)
You have to double check the firmware version that can be found here: lavalink.com/samsung-tablet-adapters-support/compatibility-list/. LAVA is the only manufacturer of adapters for Samsung tablets that allows that since Samsung doesn't sell anymore their hubs. These adapters will provide you enough power for the tablet and peripherals, and you can simultaneously access them. Plus, no tablet rooting is required so your warranty is save. Regarding, the SD card slot you have to double check which one offers it. Hope, that I helped a little bit. Good luck with your research!
Click to expand...
Click to collapse
One of these would be exactly what I am looking for, but it turns out their quite hard/expensive to get a hold of in Australia

Palima said:
Samsung tablets for sure can support OTG Host/Charge for a tablet and peripherals. Here is a list of supported tablets:
Samsung Galaxy Tab A (10.1″)***
Samsung Galaxy Tab S2 (8.0″, 9.7″)
Samsung Galaxy Tab E (9.6″)*
Samsung Galaxy Tab A (8.0″, 9.7″**)
Samsung Galaxy Tab 4 (8.0″, 10.1″)
Samsung Galaxy Tab S (8.4″, 10.5″)
Samsung Galaxy Tab Pro (10.1″, 12.2″)
You have to double check the firmware version that can be found here: lavalink.com/samsung-tablet-adapters-support/compatibility-list/. LAVA is the only manufacturer of adapters for Samsung tablets that allows that since Samsung doesn't sell anymore their hubs. These adapters will provide you enough power for the tablet and peripherals, and you can simultaneously access them. Plus, no tablet rooting is required so your warranty is save. Regarding, the SD card slot you have to double check which one offers it. Hope, that I helped a little bit. Good luck with your research!
Click to expand...
Click to collapse
I find it curious that they specifically mention stock, unrooted firmware. Will they still work if you are rooted?
Also, the Tab S2 is capable of pulling more power than the adapters can provide. If the screen is on, and very bright, you will still drain the battery, just much slower.

Hey guys, I have good news! After messing around/testing a few things it turns out all you need is a ~64.9k ohm (mine was 66.5k) resistor between pins 4 and 5 of the micro USB plug to enable OTG + Charging. I haven’t got much past prototyping it yet but I thought I’d share. Here’s a link to the post I sourced it from: https://forum.xda-developers.com/galaxy-s3/general/hw-mod-usb-otg-charging-galaxy-s3-t1953061

jshamlet said:
I find it curious that they specifically mention stock, unrooted firmware. Will they still work if you are rooted?
Never checked that. I know its a kernel that decides if the tablet supports it or not.
Also, the Tab S2 is capable of pulling more power than the adapters can provide. If the screen is on, and very bright, you will still drain the battery, just much slower.
Click to expand...
Click to collapse
For S2 they have eSTS line of products. One of their features is Screen Brightness Management (because of the draining), plus Battery Modulation to extend the longevity of the tablet (charging and discharging between "comfortable" brackets of Lithium Ion battery).

stevey500, did you solve this? I too live in Australia...

SubnormalNebula said:
Hey guys, I have good news! After messing around/testing a few things it turns out all you need is a ~64.9k ohm (mine was 66.5k) resistor between pins 4 and 5 of the micro USB plug to enable OTG + Charging. I haven’t got much past prototyping it yet but I thought I’d share. Here’s a link to the post I sourced it from: https://forum.xda-developers.com/galaxy-s3/general/hw-mod-usb-otg-charging-galaxy-s3-t1953061
Click to expand...
Click to collapse
I'm trying to get this to work with no luck. The post you linked mentions shorting the data pins and making sure you have power when you plug the connector into the tablet, then pulling the data pin short after half a second. I tried several levels of resistance from 40k ohm to about 75k ohm with no luck. Unfortunately I couldn't get closer than ~5k ohms away. I tried stock and lineage versions with no luck. I can make OTG work but I can't get both at the same time. I'm also weary about the buying the simulcharge since no place has sold them in years and they mention only older stock FW. Not sure how well it will work without the software support. Anyway in the slight chance you see this I'd like to get more info on how you made the setup work in terms of HW and SW.
Edit: Found the rest of my resistors. Got it to 64.9 also tried +/- 100 and +/- 1k with no luck.

nullr1 said:
I'm trying to get this to work with no luck. The post you linked mentions shorting the data pins and making sure you have power when you plug the connector into the tablet, then pulling the data pin short after half a second. I tried several levels of resistance from 40k ohm to about 75k ohm with no luck. Unfortunately I couldn't get closer than ~5k ohms away. I tried stock and lineage versions with no luck. I can make OTG work but I can't get both at the same time. I'm also weary about the buying the simulcharge since no place has sold them in years and they mention only older stock FW. Not sure how well it will work without the software support. Anyway in the slight chance you see this I'd like to get more info on how you made the setup work in terms of HW and SW.
Edit: Found the rest of my resistors. Got it to 64.9 also tried +/- 100 and +/- 1k with no luck.
Click to expand...
Click to collapse
So I wasn’t able to reproduce the above results myself, I’m to sure what I did to get it to work. I did, however, get it to work by activating “lan hub” mode after messing around for a while. I think the resistance for it was around 110k ohms, but I may need to double check that.
I made a cable with that resistance across pin 4 & 5 and it seems to charge. As far as I can tell it’s only a slow charge (max 1A) so it may need a kernel modification to charge at 2A.

SubnormalNebula said:
So I wasn’t able to reproduce the above results myself, I’m to sure what I did to get it to work. I did, however, get it to work by activating “lan hub” mode after messing around for a while. I think the resistance for it was around 110k ohms, but I may need to double check that.
I made a cable with that resistance across pin 4 & 5 and it seems to charge. As far as I can tell it’s only a slow charge (max 1A) so it may need a kernel modification to charge at 2A.
Click to expand...
Click to collapse
Awesome thanks for your help. I finally got it. 136k (2x68k resistors) ohms across the 4-5 pins. Didn't need to short the data pins. On this stock based rom. I'll have to check the Lineage rom I was using tomorrow. The only downside it that it requires power for the OTG to work in this mode vs a hard short which will allow OTG to run on battery. Not a huge deal though I can easily work around this with some relays. Charge does appear to be at ~1 amp (I only tried for a few minutes) which isn't a huge deal. I don't mind if it loses a bit of charge with heavy usage I just want it to have at least some charging.

Palima said:
Samsung Galaxy Tab A (10.1″)***
Samsung Galaxy Tab S2 (8.0″, 9.7″)
Samsung Galaxy Tab E (9.6″)*
Samsung Galaxy Tab A (8.0″, 9.7″**)
Samsung Galaxy Tab 4 (8.0″, 10.1″)
Samsung Galaxy Tab S (8.4″, 10.5″)
Samsung Galaxy Tab Pro (10.1″, 12.2″)!
Click to expand...
Click to collapse
Any other manufacture devices support this (some Chinese devices, like Xiaomi)?

Does Samsung Galaxy Tab A 7.0 support OTG+Charging at the same time?

User848 said:
Any other manufacture devices support this (some Chinese devices, like Xiaomi)?
Click to expand...
Click to collapse
I saw some custom Chinese tablets' builds that could support Host/OTG while charging, but they were not from major brands like Xiaomi. I also tested Lenovo Tab 4, and this tablet also supports this mode. Of course, we're only referring here to Micro USB tablets as USB-C tablets have a different methodology of supporting this functionality.

Helo,
I want to dig up that topic because I found tablet meeting my specifications, Kruger&Matz 7" EAGLE 702 (USB C!, LTE, radio, mini jack)
So I would like to ask will it work if I use HUB USB C to 4 x USB 3.0, one USB3.0 as tablet power and rest of usb's as data connections. Or should I buy USB C Splitter (USB C to 2x USB C)
Would be great if first option will be working because it have external power supply.
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For anyone still looking into this again, the correct value for the Tab S2 SM-T713 (gts28vewifi) for OTG + Charge with the stock kernel (tested on LineageOS 16 and 17 for me) is 121k. This will set the device to a cable type of "UNIVERSAL_MMDOCK" which allows OTG as well as fast charging, up to 2.1A. Found in muic.h in the samsung kernel source:
Code:
/* MUIC ADC table */
typedef enum {
ADC_GND = 0x00,
ADC_SEND_END = 0x01, /* 0x00001 2K ohm */
ADC_REMOTE_S11 = 0x0c, /* 0x01100 20.5K ohm */
ADC_REMOTE_S12 = 0x0d, /* 0x01101 24.07K ohm */
ADC_RESERVED_VZW = 0x0e, /* 0x01110 28.7K ohm */
ADC_INCOMPATIBLE_VZW = 0x0f, /* 0x01111 34K ohm */
ADC_SMARTDOCK = 0x10, /* 0x10000 40.2K ohm */
ADC_HMT = 0x11, /* 0x10001 49.9K ohm */
ADC_AUDIODOCK = 0x12, /* 0x10010 64.9K ohm */
ADC_USB_LANHUB = 0x13, /* 0x10011 80.07K ohm */
ADC_CHARGING_CABLE = 0x14, /* 0x10100 102K ohm */
[B] ADC_UNIVERSAL_MMDOCK = 0x15, /* 0x10101 121K ohm */[/B]
ADC_UART_CABLE = 0x16, /* 0x10110 150K ohm */
ADC_CEA936ATYPE1_CHG = 0x17, /* 0x10111 200K ohm */
ADC_JIG_USB_OFF = 0x18, /* 0x11000 255K ohm */
ADC_JIG_USB_ON = 0x19, /* 0x11001 301K ohm */
ADC_DESKDOCK = 0x1a, /* 0x11010 365K ohm */
ADC_CEA936ATYPE2_CHG = 0x1b, /* 0x11011 442K ohm */
ADC_JIG_UART_OFF = 0x1c, /* 0x11100 523K ohm */
ADC_JIG_UART_ON = 0x1d, /* 0x11101 619K ohm */
ADC_AUDIOMODE_W_REMOTE = 0x1e, /* 0x11110 1000K ohm */
ADC_OPEN = 0x1f,
ADC_OPEN_219 = 0xfb, /* ADC open or 219.3K ohm */
ADC_219 = 0xfc, /* ADC open or 219.3K ohm */
ADC_UNDEFINED = 0xfd, /* Undefied range */
ADC_DONTCARE = 0xfe, /* ADC don't care for MHL */
ADC_ERROR = 0xff, /* ADC value read error */
} muic_adc_t;

solidxsnake13224 said:
For anyone still looking into this again, the correct value for the Tab S2 SM-T713 (gts28vewifi) for OTG + Charge with the stock kernel (tested on LineageOS 16 and 17 for me) is 121k.
Click to expand...
Click to collapse
Thanks a million! Worked like a charm on Galaxy Tab S2 (SM-T813) with stock rom.

hey everyone i have samsung galaxy tab a 2016 (SM-T585) android 8.1
can this device get usb host + charging?
planning to install it as my car stereo.

Baso_1990 said:
hey everyone i have samsung galaxy tab a 2016 (SM-T585) android 8.1
can this device get usb host + charging?
planning to install it as my car stereo.
Click to expand...
Click to collapse
Me too, exactly this set-up, same model year etc, its going into a 350Z.
According to Workshop twelve you can do it.
OTG/USB/Charge/HUB…. WTF?!?!? | Workshop 12 (workshoptwelve.com)
The 100K quoted is not working for me.
However I have tried 100K, 121K, 64K 65.9K 40K, 88K 89K all with no success so far.
The Lava simulcharge is not available in the UK, and to import it (on a chance it wont work) is costing over £100, I am reluctant to spend this on a chance.

Samsung SM-T585 wired to a Suyama Hub (De-Soldered the USB Micro lead and soldered my own new one in)
SUYAMA USB OTG Adapter for TV Stick 4K, All-New TV: AmazonSmile: Electronics
With power into the hub and a new Micro USB lead with 87.5K resistor between Gnd and sensor pins.
This now charges and provides 4 USB OTG ports.

CCooperTech said:
Samsung SM-T585 wired to a Suyama Hub (De-Soldered the USB Micro lead and soldered my own new one in)
SUYAMA USB OTG Adapter for TV Stick 4K, All-New TV: AmazonSmile: Electronics
With power into the hub and a new Micro USB lead with 87.5K resistor between Gnd and sensor pins.
This now charges and provides 4 USB OTG ports.
Click to expand...
Click to collapse
will try it with 87.5k thanks