CORRECT dock connector pinout

[MitchJS]

this is at least up to the ipod photo, which prob hasnt changed
Ill do a nice PDF file and attach tonight(ish)

PINS... what i need to show u is where pin 1 is.. i need a good pict
pin 1 is on left WHEN, the dock connect is held towards you, with the wires exiting on rear, and notches at the TOP!!
i got some crude picts attached... ill try to take a close up of a real connector

Code: Select all

PIN
1 F/W GND I Firewire and charger ground
2 F/W GND I Firewire and charger ground
3 TPA+ I/O Firewire signal
4 USB D+ I/O USB signal
5 TPA- I/O Firewire signal
6 USB D- I/O USB signal
7 TPB+ I/O Firewire signal
8 USB PWR I USB power in used to detect a USB host.
9 TPB- I/O Firewire signal
10 Accessory Identify I Pull down to notify iPod of specific device
11 F/W PWR+ I Firewire and charger input power (8v to 30v dc)
12 F/W PWR+ I Firewire and charger input power (8v to 30v dc)
13 ACCESSORY PWR(3V3) O 3.3v is nominal output from iPod. Current limited to 100mA.
14 Reserved
15 USB GND GND Digital ground in iPod
16 DGND GND Digital ground in iPod
17 Reserved
18 Tx I Serial data to iPod
19 Rx O Serial data from iPod
20 Accessory Detect I/O (See Functional description accessory detect for details)
21 S Video Y O The luminance component of S Video (iPod Photo only)
22 S Video C O The chrominance component of S Video (iPod Photo only)
23 Composite Video O iPod Photo only
24 Remote Sense O *SEE NOTE BELOW TABLE
25 LINE-IN L I Line level input to the iPod for the left channel
26 LINE-IN R I Line level input to the iPod for the right channel
27 LINE-OUT L O Line level output to the iPod for the left channel
28 LINE-OUT R O Line level output to the iPod for the right channel
29 Audio Return GND Audio return – Signal, never to be grounded inside accessory
30 DGND GND Digital ground in iPod
31 Chassis Chassis ground for connector shell
32 Chassis Chassis ground for connector shell

Notes:

Code: Select all

NOTE: The remote sense function minimizes crosstalk between the analog video and
analog audio outputs. The remote sense returns a low side of load voltage that is
impressed on the audio to suppress crosstalk and to provide optimal analog audio and
analog video. Routing and connection of remote sense is critical to achieve the best
results. Haphazard application of remote sense will yield poor results. Apple
Computer, Inc. must review accessories using analog video and analog audio.

[MitchJS]

I read the note, and still dont understand...

anyone want to scope it out, and try to analize it?


mitch

[Xtreme984]

sorry , that guest was me... forgot to log in... the pics are showing up

thanks a lot mitch this truly helps me, cuz I want to make a FM tuner for iPod

[mushoo]

I've got a question, I was asking about it on the iPodLinux forums.

The firewire/charging pins can be powered at anywhere from 8v to 30v? I was under the assumption that it had to be a regulated 12V input.... if not, my device becomes much, much easier to create. Any idea what the current draw is on the pins?

[MitchJS]

8 watts Max (at least up to the photo)


p = I * E

8 = i * 12volts

i = 8/12

i = .667

667 ma at 12v

i cant imagine the nano drawing more

only maybe the video ones... but not much more


mitch

[charlywrx]

HI Mitch,

Im developing a kind of dock connector and found these on ipod nano:
1. Pin 29(AGnd) and pin 30 are shorted. but according to your explanation, pin 29 shudnt b connected to gnd in the accessories, but it;s grounded inside the ipod itself.
2. what;s the function of Serial Gnd (pin 20), from some googling, most of ppl just short this to gnd. but ifound that when the red probe is connected to Gnd pin, and black probe to this pin, there is "negative" impedance of 52.4k Ohm. what does this do?

im asking this becos there are too much noise when the ipod is connected to my dockstation circuit.
currently all gnd except serial gnd are shorted to one another n to my dock station. the station is powered from ipod 3.3v.

hope u can help

charly

[gadgetnut]

Is this the correct pinout for the Video Ipod?

[MitchJS]

charlywrx,

pin #20 is NOT serial ground, its Accessory Detect!

pin #29/30 thats right from apple's mouth

in my design, i dont connect them together in my microcontroller interface

prob for noise reasons...

the dock pinout is at least good up to the IPOD PHoto

video came out afterwards... so id think its the same

mitch

[JDoubleU529]

this is at least up to the ipod photo, which prob hasnt changed
Ill do a nice PDF file and attach tonight(ish)

PINS... what i need to show u is where pin 1 is.. i need a good pict
pin 1 is on left WHEN, the dock connect is held towards you, with the wires exiting on rear, and notches at the TOP!!
i got some crude picts attached... ill try to take a close up of a real connector

Code: Select all

PIN
1 F/W GND I Firewire and charger ground
2 F/W GND I Firewire and charger ground
3 TPA+ I/O Firewire signal
4 USB D+ I/O USB signal
5 TPA- I/O Firewire signal
6 USB D- I/O USB signal
7 TPB+ I/O Firewire signal
8 USB PWR I USB power in used to detect a USB host.
9 TPB- I/O Firewire signal
10 Accessory Identify I Pull down to notify iPod of specific device
11 F/W PWR+ I Firewire and charger input power (8v to 30v dc)
12 F/W PWR+ I Firewire and charger input power (8v to 30v dc)
13 ACCESSORY PWR(3V3) O 3.3v is nominal output from iPod. Current limited to 100mA.
14 Reserved
15 USB GND GND Digital ground in iPod
16 DGND GND Digital ground in iPod
17 Reserved
18 Tx I Serial data to iPod
19 Rx O Serial data from iPod
20 Accessory Detect I/O (See Functional description accessory detect for details)
21 S Video Y O The luminance component of S Video (iPod Photo only)
22 S Video C O The chrominance component of S Video (iPod Photo only)
23 Composite Video O iPod Photo only
24 Remote Sense O *SEE NOTE BELOW TABLE
25 LINE-IN L I Line level input to the iPod for the left channel
26 LINE-IN R I Line level input to the iPod for the right channel
27 LINE-OUT L O Line level output to the iPod for the left channel
28 LINE-OUT R O Line level output to the iPod for the right channel
29 Audio Return GND Audio return – Signal, never to be grounded inside accessory
30 DGND GND Digital ground in iPod
31 Chassis Chassis ground for connector shell
32 Chassis Chassis ground for connector shell

Notes:

Code: Select all

NOTE: The remote sense function minimizes crosstalk between the analog video and
analog audio outputs. The remote sense returns a low side of load voltage that is
impressed on the audio to suppress crosstalk and to provide optimal analog audio and
analog video. Routing and connection of remote sense is critical to achieve the best
results. Haphazard application of remote sense will yield poor results. Apple
Computer, Inc. must review accessories using analog video and analog audio.

Still confused. According to this pinout, Pins 21-23 deals with video wich is photo only. Can anyone tell me exactly what pins to use to hook it up to a RCA connector. I just don't want to distroy my brand new 80Gb iPod Video.

[cks2006]

Just pin 23 and a ground.

[MikeyMan]

About that connector... I currently have a small problem with my ipod nano...

connecting it to a dock -fitted on my pioneer ipod-interface- won't charge it...

Funny thing is; it did charge my old ipod mini... And it still does that correctly...

Anyone got any idea what could be the solution to this?

[xzolian]

http://pinouts.ru/Devices/ipod_pinout.shtml
So is this pin out incorrect?

What separates the iPod explorer pin out from this product http://www.sparkfun.com/commerce/product_info.php?products_id=8295 ?

[MitchJS]

that one posted, is backwards... based on apple's and the OEM of where pin 1 is

and that sparkfun thing is just a breakout...

ipod explorer is a RS232 Interface with breakout for audio and power
and comes with free software to help one explore the iPod's protocol (that is not authenticated)

and im sure there is a slight change in current ipods... but not to rs232/audio/and power


mitch

[SLOJAM]

Pins 14 and 17 are listed as 'reserved' - anyone have any info as to what they are for?

[MitchJS]

this is very old...
ipod 5.5gen and below

ipod has changed, dock has changed slightly