30 pin Apple iPod proprietary dock connector at the docking station
Pinout compatibility: Apple iPad 1Apple iPad 2Apple iPad 3Apple iPhone 1st GenApple iPhone 3GApple iPhone 3GSApple iPhone 4 – AT&TApple iPod (Color Display)Apple iPod 1st GenerationApple iPod 2nd GenerationApple iPod 3rd GenerationApple iPod 4th Generation (Photo)Apple iPod 4th Generation U2 Special EditionApple iPod classic 120GBApple iPod classic 160GB (2007)Apple iPod classic 160GB (Late 2009)Apple iPod classic 80GBApple iPod Mini 4GBApple iPod Mini 6GBApple iPod nano 1st GenerationApple iPod nano 2nd GenerationApple iPod nano 3rd GenerationApple iPod nano 4th GenerationApple iPod nano 5th GenerationApple iPod touch 1st GenerationApple iPod touch 2nd GenerationApple iPod touch 3rd GenerationApple iPod touch 4th GenerationApple iPod Video 30GBApple iPod Video 60GBApple iPod Video 80GBApple iPod Video U2 Special EditionApple New iPad
charging, connecting to a PC via USB or Firewire, to a stereo via
line-out, to a serial device (controlled via the Apple Accessory
Protocol). This connector exists in most Apple iPod MP3 players (iPod
3G, 4G, 5G Video, 5.5G Video, Nano (1G, 2G, 3G, 4G), Mini, Classic,
Touch, Touch 2G, and iPhone (1G, 3G and 3GS))
|Pin||Signal||Description||Apple pin numbering*|
|1||GND||Ground (-), internally connected with Pin 2 on iPod motherboard||30|
|2||GND||Audio & Video ground (-), internally connected with Pin 1 on iPod motherboard||29|
|3||Right||Line Out – R (+) (Audio output, right channel)||28|
|4||Left||Line Out – L(+) (Audio output, left channel)||27|
|5||Right In||Line In – R (+)||26|
|Line In – L (+)||25|
Composite video output (only when slideshow active on iPod Photo)
or Component Video Pb
|9||S-Video Chrominance output||
for iPod Color, Photo only
or Component Video Y
|10||S-Video Luminance output||
for iPod Color, Photo only
or Component Video Pr
|11||AUDIO_SW||If connected to GND the iPhone sends audio signals through pin 3-4, otherwise it uses onboard speaker.||20|
|12||Tx||ipod sending line, Serial TxD||19|
ipod receiving line, Serial RxD
|15||GND||Ground (-), internally connected with pin 16 on iPod motherboard||16|
|16||GND||USB GND (-), internally connected with pin 15 on iPod motherboard||15|
3.3V Power (+)
Stepped up to provide +5 VDC to USB on iPod Camera Connector. If
iPod is put to sleep while Camera Connector is present, +5 VDC at this
pin slowly drains back to 0 VDC.
|19,20||+12V||Firewire Power 12 VDC (+)||11,12|
|21||Accessory Indicator/Serial enable||
Different resistances indicate accessory type:
6.8 kΩ - Serial port mode. Pin 11-13 are TTL level. Requires MAX232 chip to convert to RS232 levels.
|22||TPA (-)||FireWire Data TPA (-)||9|
|23||5 VDC (+)||USB Power 5 VDC (+)||8|
|24||TPA (+)||FireWire Data TPA (+)||7|
|25||Data (-)||USB Data (-)||6|
|26||TPB (-)||FireWire Data TPB (-)||5|
USB Data (+)
iPod 5G can also be forced to charge by attaching the data + and
To charge an iPhone, 3G, 3GS, 4 / iPod Touch, 2nd gen, 3rd, 4th or Ipod Classic (6th Gen),
To charge iPod Nano pins 25 and 27 should be tied
It’s also possible to charge the iPod’s or iPhone’s battery to
Added correction: iPod 2.1A charger advertises 2.8V on D+ and 2.0V
|28||TPB (+)||FireWire Data TPB (+)||3|
|29,30||GND||FireWire Ground (-)||1,2|
*There are two pins numbering schemes for this connector, this one (on right column) is from Apple manual.
It is become available after publishing of most pinouts and not used on this site.
Back side of dock connector; 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29
Pins 1, 2 connected on motherboard.
Pins 15, 16 connected on motherboard.
Pins 19, 20 connected on motherboard.
Pins 29, 30 connected on motherboard.
If you disassemble the original apple-ipod-dock-connector-cable and
look at the connector itself, on the back side, where it is soldered,
you can see the number 1 and 30 (e.g. Pins 1 and 30). In this
description the NUMBERING is INVERSED: Pin 1 is Pin 30 and Pin 29 is Pin
2. So, don’t look at the numbers on the connector.
The remote control, iTalk and other serial devices use the Apple
Accessory Protocol for communication with the iPod. This protocol was
introduced with the 3rd generation iPods, and is also compatible with
the 4th generation iPods and mini iPods. The connections uses a standard
8N1 (one startbit. 8 data bits, one stop bit) serial protocol, 19200
baud (higher rates up to 57600 are also possible, but speeds faster than
38400 may cause problems with large amounts of data), with a delay of
12 microseconds inserted between the end of the stopbit and the
beginning of the next startbit (also works without this delay).
Electrical: high +3.3V low 0V
Default line state: high. Codes used for communication with peripherals are here
This device may be connected to the firewire computer port by straight cable (±TPB, ±TPA should be twisted pairs).
supply on the Firewire pins. If you tie Pins 25 and 27 together and then
connect a 10 kOhm resistor to ±5 volts to pins 23 and 15 (or 16), it
will charge. If you don’t tie Pins 25 and 27 together, it won’t charge.
(GND and audio out GND) to be connected in order to output audio (Pin 11
to GND). Works with appr. 500 kOhm between pin 21 and GND.