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Issey
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USB Cable Pin Layout

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Can anyone show me the USB Cable pin out for the following ipod.

iPod shuffle 3rd Generation

Model A1271 / 2 or 4 GB capacity

Rgds..

Issey

Edited by

oldturkey03

Hi Issey, I also want to know the pinout of this USB cable, did you find it?

jean,

Hello! Did you find the pinout finally? i have the same problem! I lost my usb cable, i found the components but i don`t know the schematics

jorj,

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QEII Student IT
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I think this is it: Click Here

I tried it, but did not work. Maybe that diagram was for shuffle 2G and I am told the layouts for 2G and 3G are different. Any idea?

Issey,

Here's the whole list

QEII Student IT,

did the pins as in the cable diagram, no luck. Any hints?

Issey,

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lollo
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maybe i have a solution but my welder is gone right now and i cannot try finally. i tried different solution but i think that the right sequence is: 4 Black/ground - 3 Red/vcc - 2 white/data - 1 green data+. Where 1 is the tip of the jack.

If somebady could test this sequence and then to post it if works will be the better thing.

Otherwise i will try it tomorrow.

It seems do not work. But if I put 1. white - 2. green - 3. red - 4. black, win xp sound like new usb device, and after few seconds shows me that there is a new usb device not properly recognized. There's someone whit some ideas???

lollo,

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Jose Carlos Lopez Gaona
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Hey, maybe this can help, it's about reverse engineering iPod Shuffle remote control.

http://david.carne.ca/shuffle_hax/shuffl...

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Chuck Fixit
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Apple obviously uses some jiggery pokery in their cables which means they are nigh on impossible to replicate. I say this as a result of some tests that I did on my Shuffle 3 USB charging cable which revealed the following:-

Pin 1 (tip) connects to USB pin 2 (white) which is D- (Left Channel).

Pin 2 connects to USB pin 3 (green) which is D+ (Right Channel).

Pin 3 connects to USB pin 4 (black) which is Ground.

Pin 4 & USB pin 1 mysteriously don't appear to connect to anything!

However when the cable is plugged into a USB socket there is a voltage of 3V between pin 3 (ground) and pin 4 i.e. pin 4 is getting +3V from somewhere!!!

Obviously it's not directly from USB pin 1 (VCC) is this would be +5V and as I said there is an open circuit between this & pin 4.

Therefore I can only conclude that there is some kind of internal high resistance connection between the pins in the official Apple Cable which somehow gets the voltage from the data lines. I cannot confirm this due to not having a good enough meter to test it & am not prepared to take the cable to bits to look what is inside.

Or maybe the fact alone that Pin 4 & USB pin 1 aren't connected somehow allows the Shuffle to draw power from the data lines of it's own accord? Perhaps someone could test this!

Otherwise if someone has access to a spare cable that they don't mind damaging then they could disassemble it to crack this problem.

Until then it seems the only solution to the lost cable problem is to pay Apples prices for a replacement!

Edited by

Chuck Fixit

I got the same result from Chuck Fixit. But when I measure the resistance between the usb pin and 3.5 pin, I found out the resistance for the USB 2 and 3 pin are 3 ohms (relatively high on a short cable like this). And the resistance for the pin 1 is only 1 ohm. I think they are using the high internal resistance for sensing somehow. I just love E71 http://theflyingsquirrel.ca/E71howto.php

The Flying Squirrel,

I think you must bias (pull-up) the d+ line to +5 V with a 10 kohm resistor

Jacques,

I have disassembled a Shuffle 4G cable. Under its Type-A USB connector's cover is a small pcb carrying three chips and a few passive components. One of them is a leggy chip that could well be a microcontroller. So this cable is active for sure and this would explain the high-impedance state of the powered-down cable. It would be helpful if another user could pry-open the cover of their 3G/4G cable, I believe these are the same, and check this embedded chip existence. Worryingly, such a design creates a horrible opportunity to create malicious USB exploit cables and passed-off as innocuous Apple originals. I note that there are plenty of Shuffle 4G USB cables on eBay. I say worryingly because my cable is a replacement from eBay - I'd lost the original cable. Another curious and perhaps revealing situation I found. I tried connecting an Archos cable which is wired pin-to-pin in the same manner as the 1G/2G shuffles - It worked; yet only once. This one-off behaviour was repeated on a second machine, where it worked, but just the once. thereafter the Shuffle was completely invisible to the computers using this cable.

Tim,

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Jacques
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Hi Tim

Might this be the PCB http://www.ladyada.net/make/mintyboost/i...

Thanks for that very informative link. The PCB is different in my Shuffle cable. The device I suspect as a microcontroller is unlabeled but here's what I can describe: PCB topside: screenprinted with string: '2009-2C 090415A' IC: 8 pin SMD, no label PCB underside: IC: 5 pin SMD's labelled 'LGAA' IC: 5 pin SMD labelled '101' ...and 7 passives

Tim,

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Tim
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Here are photos of each side of the Shuffle 4G cable.

http://www.esdl.co.uk/photo/Apple%20Shuf...

http://www.esdl.co.uk/photo/Apple%20Shuf...

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