Database Info

Simultaneous micro usb to 3.5 mm audio out while charging possible?

A similar question has been asked on modaco but I don't think a solution was found. Therefore I am going to ask if this would work here.
Is it possible to connect a micro usb (male) to mini usb (female) adapter up to this thing (HTC 4 in 1 adapter: I can't post link because I am a new user but just search it on youtube). This would connect to the tg01 micro usb and provide a 3.5 mm audio out in addition to a mini usb connection where one could potentially hook up a charger. I was thinking of testing this out as it would cost about 10-15 dollars but I do not want to damage my phone in the process. I have no electrical engineering knowledge but maybe someone else can explain if this would work before I order anything.
On a side note: I order samsung WEP870 bluetooth headphones on sale as an alternative to this. Note sure how sound quality is but I will try answer any questions you guys might have.
Any input is welcome.

mobius8 said:
Is it possible to connect a micro usb (male) to mini usb (female) adapter up to this thing (HTC 4 in 1 adapter: I can't post link because I am a new user but just search it on youtube). This would connect to the tg01 micro usb and provide a 3.5 mm audio out in addition to a mini usb connection where one could potentially hook up a charger.
Click to expand...
Click to collapse
I was heavily involved in the discussion running on MoDaCo you refered to; unfortunately there has been no breakthrough on this issue to date.
I did look into the the HTC adapter you mention, but it actually uses the proprietary HTC ExtUSB plug on the input end (connecting to the phone) and NOT a normal mini-USB. The ExtUSB has 11 pins which include a discrete audio output (being used to feed the 3.5mm jack socket) and also hard-wired power (used to accept the charger input).
In the case of the TG01 uUSB socket, it is too 'intelligent' for its own good. Every function, charging, audio out, USB data transfer, etc., is under procesor control. Different functions are triggered by the device 'seeing' a certain resistance across the sense pin and ground; depending on this the processor then configures the use of the socket pins accordingly.
I am after what you are trying to achieve also; there is a chip supposedly available which is intended to fulfil exactly this functionality, but I've been unable to find any devices on the market which use it and attempts to contact the manufacturer with a view to getting a few samples to try and build an interface have so far been unsuccessful.
I've attached a couple of documents which explain the uUSB Charger Adapter and also the chip spec sheet for reference.
View attachment MC34825.zip View attachment batt_charging_1_1.zip
If anyone else knows anything to help move this one forward, will be much appreciated !

Thanks for the nice explanation,
Hopefully one day there will be an adapter that can make this possible.

Solving usb port mistery

Hello everyone! My name is Patryk Andrzejewski (don't try to read my name if you're not polish), and this is my first thread on XDA.
I am studing electronics on university of technology so i'm pretty well with all kind of electronic stuff.
What i'm trying to do is "x-ray" the usb port in our TG01.
My basic targets is to find way to charge the device while using USB HUB or while listening music. If it's even possible to do.
Right now I know how to connect TG01 to amplifier by 3.5mm plug. Generaly most amplifiers have high impedance input while tg01 expect low impedance earphones to switch usb port to audio output. So what we need to do is take two resistors with the same resistance around 10k Ohm and connect them both between ground and both signal channels in male 3.5mm plug of the amplifier. This should do the trick. You can experiment with resistance but it should be as high as possible to not interfere in sound quality, but if it be to big output won't swich or sound would chop on high volume.
Basic usb cable have four wires plus ground. While micro usb plug have five pins. This extra pin is used to tell device what cable is connected, hub earphones charger or pc. It can be done by two ways, in each cable this extra pin is shorted to diferent other pins. Or it's connected by resistor to ground or Vcc.
What i need to do is determine how it is in our devices and if it would be done make a cable what will allow to charge while using usb to other purposes.
I can also help with porting microusb-3.5mm cables from other devices to TG01, just what i need is this cable, it's schematic, connection route with insides picture or small donation to buy it for tests.
Or eventualy I can make solution how to do it yourself.
Right now I waiting for a pack with new empty microusb male and female plugs to do some tests.
If someone have some experience with this please share.
Also it would be great if someone will port me on to usb switch driver.
Feel free to talk to me on priv.
Thread will be updated...

Hi @patryk,
Welcome to the TG01 Forum.... especially on this particular topic - if you can find a way to get multiple function via the uUSB port simultaneously, that will be great
There have been various attempts at this before, but in practice the only route seems to be using Bluetoth for audio while either charging or using the port in host mode.
I did a piece on Brighthand a while ago on connecting an external hard drive; there have also been discussions on MoDaCo and later on XDA (down the Accessories thread.... one is here and I think there may be some earlier than that). There is a link in the XDA post to a Freescale Smiconductor chip schematic. This is supposed to be able to (externally) support multi-function usage - ntended to be used by 3rd Party manufacturers in eg. a car kit, but as yet I am not aware of any such accessories having been released. If/when available would be suitable for any of the modern crop of uUSB based evices, though I think many car makers have opted for Bluetooth connectivity instead of the older style fixed car kits with cables.

Acording to pdf from your link I'm right, its all about one resistor. It's entire possibly to do this.
Tomorrow morning tests...
Thanks
oh I cant wait so:
rid_f: >220 kOhms
rid_a: 122-126 kOhms <-- this is what we're interest in
rid_b: 67-69 kOhms
rid_c: 36-37 kOhms
rid_g: 1 kOhm
These res val has small tolerance and ar not typical.
rid_a resistance is used to switch to charge device from charger and use usb for earphones or hub!
earphones - yes, but headset - not sure I must check first where mic is connected
here it is Dummy cable schematic:

Here are some related illustrations:
Schematic of the uUSB standard audio accessory control:
View attachment 505996
Picture of the supplied Toshiba earphone adaptor pcb:
View attachment 505997
The mic is connected to pins 1 and 2 (White and bare Cu)
I have made up several 3.5mm audio adapters using Neutrik 3.5mm jacks with 10k resistors fitted from D+ and D- to 0V common:
View attachment 506008
This ensures it will switch to audio out when connecting to external speakers with or without a ground-loop isolator transformer where typically the external device will have too low an impedance for the TG01 to recognise.
Shorting out D+ (Pin 2) and D- (Pin 3) causes the TG01 to go into Charging mode.
An R from ID (Pin 4) to 0V (Pin 5) causes the TG01 to go into Host mode.

I check all of these Rid's and it seems they don't work on Tg01. No matter how i try there is working only charging or earphones never both same time.
As you say device can be forced to charge when resistor < 200 ohm is connected between D+ and D- and they are floating.
There also must be other way to do this by the driver of usb charging becouse pc link charges only when TG is on.
In TG mic an switch of headset are connected to ID pin. So this first schematic of yours is about Toshiba accesory ?
Technicaly charging while using audio out is possible becouse VBUS pin is free in headset.
I'll do some other tests tomorrow..

Hi!
Any news since February?

I will find answers on many questions by reading this document

djtonka said:
I will find answer on many question by reading this document
Click to expand...
Click to collapse
It is a good document, but iunfortunately leaves many questions unanswerable.
In Section 6.4 it shows a schematic of an Accessory Charger Adapter which is essentially what we need to achieve simultaneous charging and audio out (or other functions). It does not however give enough detail to implement. I have previously identified a Freescale chip which has been designe dto do this job, but hae been unable to identify any source from which to obtain one. In essence this is aimed at the peripheral manufacturers' -who might wish to design and market eg. a hands free car kit to which you could connect a microUSB On The Go spec device. However so far as I can discover there are no manufactureres who have as yet brought any related device to market. If anyone happens to have found anything somewhere across the globe - please shout !
Regards,
Kevin

[Q] Micro usb + aux cable?

I've been looking for a cable to use in my car with my sII skyrocket for a week or so with no luck thus far. What I want is a single cable solution that plugs into the micro usb port on my phone and provides an aux out as well as usb out so I can charge and listen to my phone through my car. The usb would plug into a usb car charger and the aux out would obviously plug into the aux in on my stereo. I know it's possible to have one cable do this as I've seen docks that have this feature but I have yet to find a cable! I loved being able to easily charge and listen to my iphone with a single cable and hopefully someone knows where I can find one for my galaxy sII. Thank!

Does your car stereo have a regular 3.5 MM audio input? If so, just get a male to male audio cable and run that from your phone's headphone jack to the stereo.

I don't think there is such a cable because the Aux is an input that only take a signal from your device to the stereo, not the other way around. Usually those docks plug into the car lighter and connect to the radio using a specific radio station signal. Like burhanistan said, you should just buy a 3.5mm male to male cable like Retrak or Belkin and get a car lighter adapter for charging.

Yeah that's what I've been using but I would prefer to use a single cable to charge and play music. As you can see in these images the official samsung dock has a pass through auxiliary port with the only input being from the micro usb port so its definitely possible.
I might try and buy one of these and soldering in a micro usb cable to charge simultaneously but the skyrocket isnt listed under the compatible phones. Oh well my search continues...

Yea, sorry bud, the closest thing you're going to get is one of those Radio adapters that has a USB port on it, as well as the 3.5" male end.

I just checked on google for awhile and simply couldn't find anything. You can find these for the iPhone and I've used them, they rocked. Seems like the Skyrocket doesn't support audio out through the usb connector?

gadgt said:
Yeah that's what I've been using but I would prefer to use a single cable to charge and play music. As you can see in these images the official samsung dock has a pass through auxiliary port with the only input being from the micro usb port so its definitely possible.
I might try and buy one of these and soldering in a micro usb cable to charge simultaneously but the skyrocket isnt listed under the compatible phones. Oh well my search continues...
Click to expand...
Click to collapse
yeah would be nice..

Just bought one of these http://www.amazon.com/Samsung-Headset-Adapter-to3-5mm-Female/dp/B003W057FS/ref=pd_cp_cps_1
If it works with the skyrocket I'm going to solder in a usb cable as well to charge it at the same time. I'll let you guys know if it works next week.

i too would love something like this. i used the IMP adapter before on my iPOD it was great could charge and listen to music at the same time with only one connector coming out. seemed more clean as far as cabling went.

Well the adapter I bought does not work with my skyrocket... Oh well I guess I'll have to deal with a mess of cables for now

[GUIDE] $7 cable that triggers Car Dock Mode (NO SOLDERING REQUIRED!)

WARNING! CONNECTING ANY CABLE TO YOUR PHONE THAT DID NOT COME WITH YOUR PHONE IN THE BOX COULD DAMAGE YOUR PHONE, YOUR COMPUTER, THE ELECTRICAL WIRING IN YOUR HOUSE, AND IT COULD KILL YOU!
you have been warned
Soooo I recently stumbled across this thread http://forum.xda-developers.com/showthread.php?t=744636&page=3
that states that if you short pins 4 & 5 on a micro USB connector and plug it into an HTC Desire, the phone will automatically go into car dock mode. as luck would have it, I happen to know that this is the same method that is used to trigger USB OTG on devices that support it. The wheels in my brain began to turn... $7 and a few days later I came up with this:
MICRO USB HOST ADAPTER + A BIZARRE A TO A USB CABLE = A CHARGING/DATA CABLE THAT TRIGGERS CAR DOCK MODE!
I have tested this on my G2 using Virtuous G-Lite 2.0.1 and it works perfectly, but YMMV.
I got the USB host adapter here
http://www.amazon.com/Micro-B-Adapt...3?s=electronics&ie=UTF8&qid=1328093895&sr=1-3
and the A to A USB cable here
http://www.amazon.com/StarTech-com-...3?s=electronics&ie=UTF8&qid=1328094123&sr=1-3
Just in case you haven't already figured it out you just connect the female end of the OTG adapter to either one of the male ends on the A to A cable, then use the cable as you would any other charging/data cable in your car. the only difference is that now your device will automatically switch into car dock mode when you plug it in! you could also connect this cable to a dock that has a female micro USB connector on the back (like the G2 OEM desktop dock here http://forum.xda-developers.com/showthread.php?t=1473718) and create your own car dock!
an extra word of warning, DO NOT USE THE A TO A CABLE ON ITS OWN FOR ANYTHING! this is a non-standard conforming cable that would damage any two USB devices that you attempted to connect with it. I have no idea what it's intended use is on it's own, but don't think that it is the same thing as a USB data transfer cable (transfer cables have a chip inside the cable that makes the two connected USB host devices see each other as USB slave devices. this A to A cable is just a copper wire)

Nice, I didn't know people wanted this. I got a premade cable. Off ebay that triggered car mode no mods needed and it was a buck. Lol
Sent from my HTC Vision using Tapatalk

Any idea about standard dock mode? I know the official tmobile dock auto opens a desk clock.

scottcom said:
Nice, I didn't know people wanted this. I got a premade cable. Off ebay that triggered car mode no mods needed and it was a buck. Lol
Sent from my HTC Vision using Tapatalk
Click to expand...
Click to collapse
What cable was this?
Sent from my HTC Vision using XDA App

ad505 said:
What cable was this?
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
My guess would be that the cable was not intended to trigger car dock mode, it was just poorly made. a really bad soldering job on the pins would short pins 4 & 5 and do the same thing. Other people have reported this same behavior when they buy low end cables or get water in their micro usb ports.

I tried this and it seams to work but all it does its launch tunein radio, any idea how to change it to other apps such as torque? Thanks

The short thing does work. I my self stumbled on to it while repearing a aftermarked charger .. I opened up the mini usb side and it had a resistor on jumping pin 5( - ) to pin 4 . With the resistor on it charches with the resistor bypassed and just jumped to pin 4 it goes in to car dock mode. Also my friend got a samsung infuse and came with a hdmi dongle usb, so out of curiosity hooked it up to my g2 and it whent to car dock mode
Sent from my T-Mobile G2 using XDA

Trying to convert 30 pin male (iphone4) to microusb male plug

Just got a Mophie juice pack for my iphone. I want to connect the male 30 pin plug from my ClearScan Live radio interface to my iphone ( which now has a usb female jack into the mophie. I searched the interweb for converters that take a 30 pin male plug and output to a microusb male plug. I can find the exact opposite of what I need. Has anyone run across such an adapted?
Sent from my Kindle Fire using Tapatalk

I think the simplest solution to give you would be to get the Camera Adapter, which provides a USB female-A jack, and then a standard A-to-microB cable. I'm not completely sure what kind of data would be permitted across that by the OS, but it's something to look into.

simplest solution to give you would be to get the Camera Adapter