UPDATE: November 8, 2014
* JTAG is disabled by QFuse.
* UART is available via the headphone jack for debugging/etc (Pinout to be posted later w/ examples)
* Searching for ways to access VSSQ and VSS (all other eMMC pins are accessible otherwise).
* New photos detailing locations of pins have been uploaded.
Current Located eMMC Pinouts:
CMD, DAT 0 to 7, VDDI, VDD, and VCCQ
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Notes:
* VCCQ is is attached to 1.8V going to GND and an AGND connection going through two capacitors; one is 4.7u while the other is 0.1u.
* VCC is attached to 2.95V GRND with the same 2 capacitors leading to AGND.
* All DAT pins have 47K resistors leading to 1.8V GND.
* The CMD pin has a 10K resistor leading to 1.8V GND.
CLK
I'm currently searching how to access VSS and VSSQ.
As far as I know jtag ports are disabled on most msm8974 soc phone in the qfuse table. That is why dont find any jtag solution for LG G2 after 13 months of its release or for any other msm8974 phones. Try to find the pins for the emmc to get direct access to it then we can mount it to the pc as an external hdd or flashsdrive.
So I have found the pins for the eMMC chip, and nicely enough they are located below the eMMC module itself. However, it is under the lid, so access requires you to desolder the lid from around it.
One thing I noticed with JTAG is that there is a *WATCH_DOG ENABLE* function that is activated by applying a 22K resistor to on of the leads (might be a different value, not at home so I don't have the PCB layout handy).
I also noticed that applying a resistor to one of the GPIO pins will trigger "FORCED_USB_BOOT", which may be handy for loading a bootloader from USB for eMMC partitioning via fastboot/etc. Haven't done enough research on that to give a definitive answer though.
Came across some more information.
Apparently, the Nexus 5 (both the D820 and D821), have four different boot configurations. Boot0, the one that is disabled altogether by default, can be activated via adding a 22K resistor to pad R3025 (attached to pin BF20 on the MSM8974). By adding this 22K resistor, we should be able to use Boot Config "0" and at the same time enable hardware Watchdog which makes me assume this is a debug mode for the Nexus 5 (and hopefully this might enable the JTAG pins). Will update as I come across more information.
Sorry, but I just want to butt in a let you guys know that there are users on here that still appreciate your dedication and curiosity to Android. This is why I love Android.
Carry on, definitely following this thread.
-------------------------------------------------------------------------
[ DEVICE : N5 ] [ ROM : L DEV PREVIEW ] [ KERNEL : ELEMENTALX ]
Thanks for the support, dEris!
So after digging around some more, the four boot configurations and Watchdog enabling GPIO pins are standard on all of the MSM8974 SOCs. The info I posted apples to both the LG G2 and Nexus 5. The MSM8974 has these GPIO pins standard across, from what I can tell, all boards. If that is correct, backing up the eMMC might be far simpler than I originally thought.
Just keep in mind that I am making a lot of assumptions here. I do not have the hardware to test this myself with, and until I do this is all speculation.
Alright, I've edited some photos to show all of the eMMC's pins on the PCB. One thing I'd like to note that the eMMC CLK pin is located on the other side of the board by the MSM8974 instead of near the eMMC chip itself.
Here are the photos:
Using these diagrams we should be able to connect directly to the eMMC chip.
Derragon said:
Alright, I've edited some photos to show all of the eMMC's pins on the PCB. One thing I'd like to note that the eMMC CLK pin is located on the other side of the board by the MSM8974 instead of near the eMMC chip itself.
Here are the photos:
View attachment 3004913
View attachment 3004912
Using these diagrams we should be able to connect directly to the eMMC chip.
Click to expand...
Click to collapse
So it is not required to find Vcc, Vss, VccQ and VssQ connections?
Sorry, I am pretty new to all of this, so thanks for the info on the other pins that I need to find. Will post a diagram of where VCC, VCCQ and GND are when I get back from work. Sorry for not posting those ones!
Derragon said:
Sorry, I am pretty new to all of this, so thanks for the info on the other pins that I need to find. Will post a diagram of where VCC, VCCQ and GND are when I get back from work. Sorry for not posting those ones!
Click to expand...
Click to collapse
My Nexus 5 refuses to power-on and I'm fairly interested in recovering all the data stored on the eMMC chip. This thread is helping out and it would be awesome to have the location of the various power pins. By the way, how did you manage to get all this information? Thanks anyway for the work you've done.
Hey is VSS and VSSQ the same thing as Ground?
Related
Hey fellow members on xda, I've decided to mirror my thread here to help out you guys if you require. If you require further assistance, head on over to http://www.slatedroi...bios/?p=1218898 or you could reply here. I can't guarantee a timely reply here as I can on slatedroid but I'll try my best!
********************************************************************
This is a slatedroid exclusive by lambstone. Some resources taken from http://www.ondaos.com/. Feel free to share a link to this thread or the contents so long as my donation link remains.
It is now necessary to solder on two resistors to be able to flash win8.1 bios properly without the HDMI/Screen bug. This is why Onda has delayed the Win8.1 update as they were probably trying to find a way to do so without a hardware modification. Unfortunately, it is pretty much confirmed that you need to solder two minuscule resistors onto an equally tiny spot to be able to flash win8.1. Most of us have really horrible soldering skills. Luckily, if you read on, I've come up with an alternate solution that will enable the majority of us to perform this hardware mod with minimal skill.
This is a pre-requisite for flashing of win8.1. Win8.1 instructions to follow once I have performed this mod.
Original Idea as found on http://www.ondaos.com/. Translated and paraphrased by lambstone
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Tools Required = 2x 0402 2.2k Ohm Resistors, Soldering Iron, Solder, Flux, Over 9000 lvl soldering skills
Steps = Solder resistor onto the red boxes into the above box.
Click to expand...
Click to collapse
Alternate Idea as found on http://www.ondaos.com/. Translated and paraphrased by lambstone
Tools: 6B Pencil
Steps: Use pencil to draw a line across the contact points to close the circuit
Non-confirmed side effects: Possible loss of HDMI output. Unsure how long the graphite lasts
This works because graphite while conducting electricity have a fairly high resistance. DO NOT SHORT CIRCUIT by simply soldering the two points together or something like that.
Click to expand...
Click to collapse
My novel idea and workaround.
In case another user thinks I did not come up with this idea. Please open the spoiler just below
guerreromanuel, on 05 Jul 2014 - 01:04 AM, said:
I would donate you but a chinese had the idea in ondaos forum so I dont know if you were the one clever or the one copying and saying he is the inventor. I dont like the last thing, is better to link -> Link
Click to expand...
Click to collapse
lambstone, on 05 Jul 2014 - 4:32 PM, said:
I don't copy and claim credit. That user is me a hint would be that he and I have the same username? I posted it there and then I decided to do a in depth post about it here. Sorry I wasn't too clear about it on the main post, I have updated the main post accordingly.
Here's the proof. (This is the same link you provided)
I understand your concerns given that it had originally seemed I stole the idea. As for donations, if you're still willing to donate since I have proven to you that it is my own idea. You know where the link is.
Click to expand...
Click to collapse
Things you will need
0402 2.2K Ohm Resistor (They come in bulk, normally like a strip of 100, cheap though. $1.99 for 100)
0.2ML New Silver Conductive Wire Glue Paste
Steps
Remove battery first
Apply wire glue to the four contact points as indicated by the motherboard image above
Press resistor to board on top of fresh glue careful to check there is no short circuit
Do not touch device over 8++ hours
You're done.
Donate to me for making this possible. Link's in my signature. Or just click this sentence.
Hey, i've sucessfully installed dual boot on the tablet with Grub, Manjaro Linux work !
http://www.ondaforum.com/topic/1674-dual-boot-is-possible-d/
can this be applied on other tablets?
tikilou said:
Hey, i've sucessfully installed dual boot on the tablet with Grub, Manjaro Linux work !
http://www.ondaforum.com/topic/1674-dual-boot-is-possible-d/
Click to expand...
Click to collapse
chuwi v99i has no hdmi and shipped without windows 8. it still has bay trail intel processor. i was wondering can it also have windows 8?
Thanks for sharing.
Hi,
I bought a UK Vodafone Smart Mini (Alcatel OT-V875 Mediatek MT6575) with no battery and no back - sold
as is - no history.
Batteries are kinda expensive for this phone (ALi014A 4-terminal), so I've been trying to see if it is a
working phone before I risk buying a battery.
If I plug in a charger, the notification led comes on solid blue, but pressing the POWER button
does nothing.
If I attach a charged Li-Ion 3.7 v 2-terminal battery (4.1 v measured) taken from another phone to the
phone's + and - contacts with clips and press+hold the POWER button, nothing happens. The blue led
stays off.
If I attach the phone to a PC via USB with no battery, the Mediatek preloader device appears
then disappears from the device manager. It does this every time I unplug and plug the phone
into the PC.
If I attach the phone to a PC via USB with just the 2 terminals connected to a battery, the
Mediatek preloader appears and disappears the first time, but if I unplug and plug the phone in again,
no USB devices are found. The blue led comes on as soon as I attach the USB lead and stays on
after I have unplugged it.
If I install the Mediatek preloader VCOM drivers, start SP Flash Tool in readback with this
[attachment 1]
readback map and connect the phone to the PC with USB, I get a complete download of the flash memory
- it takes about 40 minutes.
I have used bgcngm's mtk unpack tools in Cygwin to successfully unpack the BOOTIMG, RECOVERY and LOGO
images and they all look like Linux stuff, but I have no idea whether they are b0rked by
file misconfigurations within the packed image.
I have dumped the phone's cache space (0x3da4c000 to 0x40000000) and this is nearly all zeros
( compresses from 39534592B to 12055B ), so it looks like the last owner did a cache wipe before
selling it.
Here's how the other parts of the image look.
[attachment 2]
So my question is - does this phone _need_ a 4-terminal battery to boot ?
[SOLVED]
So I worked it out myself - this phone won't boot with 'ON'switch at all with just a 2-terminal battery. Reading datasheet of Mediatek and Ricoh PMIC chip I see the other 2 pins need to be connected with resistors - easy.
Now it boots.
Me too
melvaka said:
So I worked it out myself - this phone won't boot with 'ON'switch at all with just a 2-terminal battery. Reading datasheet of Mediatek and Ricoh PMIC chip I see the other 2 pins need to be connected with resistors - easy.
Now it boots.
Click to expand...
Click to collapse
Hi,
I have the same issue and intend to use the phone as a security cam and so don't need battery power. If you could post the pins/resistor values that would be great!
10k to ground - pins from the pic on any auction site selling the right battery. 4th pin is not some crypto-authentication anti-counterfeit nonsense, despite what some sites claim - this is a cheeeeep phone !
Hi, I wanted to just double check the pins before hooking up the wires to my phone, as I don't want to kill my phone
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Assume pin1 is on the left and pin4 is on the right, I'm guessing this is how to wire it up:
Pin 1: 10k to Battery -ve
Pin 2: Battery -ve
Pin 3: 10k to Battery -ve
Pin 4: Battery +ve
Is this correct?
Finally where can I find the Ricoh PMIC chip datasheet? I have another phone (VF-675) which uses a similar battery and would like to power it also without the official battery which is TLi014A2 which is a the same size and capacity as the TLi014A1. Thanks
Pins - yes
PMIC data sheet from Ricoh
I see no-one hits the 'Thanks' button much in this forum.
Perfect, thanks, I found the button also, I'm new here I managed to power the phone from an 18650 and it works great, looks a little ugly, I cut up a SD to Micro SD card adaptor in order to press against the phones battery contacts.
I went thru the datasheet also, a lot of it was over my head, but I have a similar Mediatek phone (alcatel 4030x) which has similar problems with the battery swelling up so I think I'll try that with an 18650 as it seems to use the same PMIC.
Hello
I recently update my Dasaita PX3 unit with Witson PX5 core board and Android 9 Hal9k firmware. MTCD is 3.71d. USB porst are not working and I see sporadic resets. USB reset after startup is enabled, temp outside 5 celcius. Please help!
I see 4 less pin on Wiston coreboard header than in PX3. Is it problem?
I noticed that 4 unpopulated pin should not be an issue - PX5 is wider than PX3 board, soldered connector on both board have the same size.
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What checks / tests have been done
On PX3 I used all USB, the same devices are not discovered after switch to PX5.
USB Host Controller app discover only wifi device, no hub or other devices.
USB devices are also not working in recovery (both android 8 and android 9 recovery - mount usb is not working)
I noticed that 4 unpopulated pin should not be an issue - PX5 is wider than PX3 board, soldered connector on both board have the same size.
I also noticed that android resets usually when more demanding task are executed. I see more reset with high brightness than with low -> I'm wondering if internal PSU can deliver enough power for PX5 board.
On PX3 I already noticed brightness fluctuation. It was not an issue for last 2 years. I thought it bad filtering of engine coil/injector
khorh said:
On PX3 I used all USB, the same devices are not discovered after switch to PX5.
Click to expand...
Click to collapse
Hi, maybe it's not your problem, but does the board fit well in the pins? For the board to work well, I had to remove the heat sink screw, collided with mother on the board. I have isudar px3 android 7.12, 2 GB RAM. MTCE_GS_V3.67. I bought a Witson px5 4 GB RAM board for Android 10. Unfortunately, Bluetooth does not work. I have a BT A5BC6 module and WQ_BC6 in the factory settings. Otherwise, everything works fine. What I read may not work wifi, bluetooth and USB. Does your bluetooth and wifi work?
I have MD725 v1. It works correctly. Wifi also work correctly.
I removed one screw from PX5 which conflicts with soldered thread on main board, I removed also rest of glue
to not prevent tight fit. I drilled heatsink to add 3rd screw and add additional heatsink on top of it:
PX5 is taken from following board. It seems to have one usb (direct connection instead of hub?).
Do you know which PINs are for USB? I can check resistance, at worst case I can even solder PX5 to mainboard but prefer not.
Nice. I only added an anodized heatsink and the temperature dropped by 8°C. I will attach the fan to the top cover. I don't know where it is on the USB board. If the SD card works, I would probably leave it at that. Maybe they would advise on 4pda.ru, but only in Russian. I use a translator.
Аппаратное обеспечение ГУ Microntek (RockChip PX3/PX5/PX6/PX30 Android 5/6/7/8/9) - 4PDA
Аппаратное обеспечение ГУ Microntek (RockChip PX3/PX5/PX6/PX30 Android 5/6/7/8/9), [Головное устройство][Автомагнитола][Android]
4pda.ru
Check second USB Data line D+/- continuity. Use schematic found in hardware section or my signature.
Yup, issue with connector confirmed. I measured from plugged PX5 to U27 chip ARM DP and ARM DM lines, one did not work.
Now I have only resets with high brightness and screen flickering. Seems like MTCD issue https://forum.xda-developers.com/t/...asaita-max10-px6-4gb-64gb-android-10.4140875/
Do you think adding cap to TFT+5V may help? For me it seems like voltage drop which lead to cpu reset
Do you also see dependency between TFT+5V (4.2v in datasheet) and brightness? I see 3,86 with medium brightness,
A collection of ADB Fastboot and Chipset based like Qualcomm, Mediatek, Spreadtrum and others flashing drivers Collection!
Most of the drivers listed here are signed drivers so you may not need to disbale driver signature enforcement.
1. 15 Seconds ADB installer
Thanks to Snoop05 (Senior XDA member).
2. LG Mobile Driver v4.8.0
3. MTK_USB_All_v1.0.8
4. Nokia_USB_Driver_v1.4.0
5. QDLoader HS-USB Driver_32_64bit_Setup
6. SAMSUNG_USB_Driver_for_Mobile_Phones
7. Sony Xperia Drivers
8. SPD_Driver_R4.20.4201
- SPRD_NPI_USB_Driver_v1.4
9. Motorola_Mobile_Drivers_v6.4.0
- MotorolaDeviceManager_2.5.4
Credits: Various sources on the Internet.
Please tell me if I have missed something or request any drivers you required or how to install guide here in the post and I will help you out.
I have uploaded all the necessary or almost universal drivers that should support most of devices and vendors.
If no OEM and Google's driver fails try some universal... mine is one option...
Yet Another Universal ADB Driver Package
Yet Another Universal ADB Driver Package and adbupdater for Windows
I made this installer as a kind of "update" the old driver package I had made for Ainol and Actions before. While at it I added those two tools usually used, that is adb and fastboot. Based on batch scripts, so it's open source. Self Signed, not...
forum.xda-developers.com
Is anyone familiar with interfacing by usb with a mediatek mt9612 hisense 43a6h android 11 google tv?
chris1892006 said:
Is anyone familiar with interfacing by usb with a mediatek mt9612 hisense 43a6h android 11 google tv?
Click to expand...
Click to collapse
Well that's little tricky because I don't think we can connect USB through normal ways. You would need to open up TV and then find the VCC, GND, D+ and D- pins on the motherboard and then with your soldering skill you would have to solder a USB cable to it and then connect it your computer to see how it goes.
mvikrant97 said:
Well that's little tricky because I don't think we can connect USB through normal ways. You would need to open up TV and then find the VCC, GND, D+ and D- pins on the motherboard and then with your soldering skill you would have to solder a USB cable to it and then connect it your computer to see how it goes.
Click to expand...
Click to collapse
Is it on one side? Thx
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chris1892006 said:
Is it on one side? Thx
View attachment 5852913
View attachment 5852915
Click to expand...
Click to collapse
I cannot see the picture clear when I zoom in.
Can you please upload this picture in high quality to somewhere else and share link here. Maybe like Google Drive.
@mvikrant97 this board is like mine but i dont have a good camera or tools to pull the mainboard. Hopefully this helps https://www.shopjimmy.com/hisense-43a65h-complete-led-tv-repair-parts-kit-see-note/
chris1892006 said:
@mvikrant97 this board is like mine but i dont have a good camera or tools to pull the mainboard. Hopefully this helps https://www.shopjimmy.com/hisense-43a65h-complete-led-tv-repair-parts-kit-see-note/
Click to expand...
Click to collapse
Thankyou for the image but I still couldn't find any such points on the main board or the daughter boards. You will have to figure it out yourselves.
You may refer to USB specifications for more information.
USB 2.0 Specification | USB-IF
www.usb.org
I'm in a facility right now that i cannot do these solding things so i guess i won't be able to do it unless i can hack the software or force the tv into USB interface debugging mode so I can first backup the rom but i don't think i can anyway because no one is telling me anything about the Mediatek MT9612 chip. I'd love to root this tv for many different reasons.
By the way do you know how to override the maximum resolution of my Google TV from 1920x1920 to 3840x2160 so i can watch 4k videos natively rather than downscaled garbage?
Thanks
chris1892006 said:
I'm in a facility right now that i cannot do these solding things so i guess i won't be able to do it unless i can hack the software or force the tv into USB interface debugging mode so I can first backup the rom but i don't think i can anyway because no one is telling me anything about the Mediatek MT9612 chip. I'd love to root this tv for many different reasons.
By the way do you know how to override the maximum resolution of my Google TV from 1920x1920 to 3840x2160 so i can watch 4k videos natively rather than downscaled garbage?
Thanks
Click to expand...
Click to collapse
I would really loved to help you but I never had a Google TV so I cannot help you. Please wait for someone else to answer.
Thankyou.
Those three connectors circled in red are HDMI connectors.
What are the two black connectors at the bottom?
Hello All
TlDr; Has anybody replaced a PX5 (Rev 4, the ones with "fewer pins") with a PX6 (4 more pins) on their units? Which "Pins" you left unconnected, the 4 on the left or the 4 on the right? (@marchnz have you done this by chance?)
My old PX5 unit (Flash memory on core board) died and I am in the process of looking for a new unit. But I was thinking on "resurrecting" the old one for my dad's car or some other project, and got a used PX6 module. Problem is, seems my unit was older than what I thought, as the number of pins on the PX5-Rev 4 is lower than the PX6 (and "newer" PX5)
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I saw another post claiming that those modules are compatible anyway, so I checked the schematics of a similar unit and found that 5v VCC is provided in the pins 1 & 2 (the ones on the left, looking at the module from the top) while most of the last pins (7x) are either ground or WiFi related (and my MTC-D has an external WiFi/BT module)
But when trying to mount it, the screws work PERFECTLY if I leave the first 4 pins unconnected. And looking for a PX5 module in eBay I found one that seems to be the "transitional revision" that has 4 more pins but are left out of the connector...and those are on the left !!!
I am at lost at what to do here. Does anybody has the pinout / schematics of the core boards itself? (either PX5 or PX6). Has anybody faced this isue before?
Thanks !!!
Max
I saw another post claiming that those modules are compatible anyway, so I checked the schematics of a similar unit and found that 5v VCC is provided in the pins 1 & 2 (the ones on the left, looking at the module from the top) while most of the last pins (7x) are either ground or WiFi related (and my MTC-D has an external WiFi/BT module)
Regards: Pubg Name Generator
Well, I decided to take the risk, and indeed the schematics that are available are at least "confusing" (if not plainly wrong) as they show up a connector numbered with 76 pins (as if it were a real 76 pin connector) but the number of physical pins in the diagram is only 72 (you won't realize that if you do not really pay attention). So, old MCUs and old PX5 boards have VCC on pins 1 & 2 (left, looking at the top)
NEWER (76-pins based MCUs & PX5/PX6) have VCC on pins 5 & 6... meaning the FIRST 4 pins are either unused (or maybe used for features only available on MTC-E MCUs and PX6). So, the photo above is correct, when you are using a 76 pin PX5/6 on a 72-PIN MCU the first 4 pins are lef unconnected/floating and VCC is actually Pin 5 of the longer board.
I tested it and everything works (audio, video, wifi, touchscreen...)
Hope this helps somebody in the future
maxiauer said:
Well, I decided to take the risk, and indeed the schematics that are available are at least "confusing" (if not plainly wrong) as they show up a connector numbered with 76 pins (as if it were a real 76 pin connector) but the number of physical pins in the diagram is only 72 (you won't realize that if you do not really pay attention). So, old MCUs and old PX5 boards have VCC on pins 1 & 2 (left, looking at the top)
NEWER (76-pins based MCUs & PX5/PX6) have VCC on pins 5 & 6... meaning the FIRST 4 pins are either unused (or maybe used for features only available on MTC-E MCUs and PX6). So, the photo above is correct, when you are using a 76 pin PX5/6 on a 72-PIN MCU the first 4 pins are lef unconnected/floating and VCC is actually Pin 5 of the longer board.
I tested it and everything works (audio, video, wifi, touchscreen...)
Hope this helps somebody in the future
Click to expand...
Click to collapse
These four pins are DSP (digital signal processor allowing advanced sound adjustment and enhancement). Nothing happens if they are not involved. You did a good job. The most common problem when replacing the board is non-functioning Bluetooth, the BT module must be replaced, but that is not your problem.
Just a little info. If you have a PX6 board. HCT-RK3399-REV12 with android 11, so they started putting the U-blox MAX-M10S (W10050-KB) gps chip on it, it doesn't show any satellites on android 10, just to clarify, if you wanted to downgrade to, android 10, for example on Hal9k mod 5.