Pinouts

[joe558]

Ok guys, i need help, im not sure how to make this clear, i need to know which pins are which, I am trying to find out which pins these represent on the iphone/ipod

1. fwgd
2. acid
3. fwpw
4. acpw
5. dotx
6. dorx
7. dogd
8. acdt
9. audl
10. audr
11. agnd
12. dgnd
13. sgnd

Any help would be great, thanks

[Kyle Matthews]

Fairly sure its the same as the iPod.

[joe558]

I agree, I believe they are the same. Sorry if my initial post was confusing, I'm basically asking what the four letter abbr. mean. I know the obvious ones I.E. audl(audio left) and audr(audio right), but wanted to know, For certain, Which ones the others represent. Thanks.

bump anyone?

[Kyle Matthews]

Ah. That page had a more detailed explanation is why I linked to it:

1. fwgd - FireWire Ground
2. acid - Accessory Indicator
3. fwpw - Firewire Power +12 VDC
4. acpw - +3.3V Power (to power iPod accessories)
5. dotx - Serial TxD
6. dorx - Serial RxD
7. dogd - Serial GND
8. acdt
9. audl - Line Out - Left
10. audr - Line Out - Right
11. agnd - Line Out - Common Ground
12. dgnd
13. sgnd

I think...

[joe558]

Thanks, that helps. Anyone else have any idea about the other 3?

[Clem-Clone]

Ah. That page had a more detailed explanation is why I linked to it:

1. fwgd - FireWire Ground
2. acid - Accessory Indicator
3. fwpw - Firewire Power +12 VDC
4. acpw - +3.3V Power (to power iPod accessories)
5. dotx - Serial TxD
6. dorx - Serial RxD
7. dogd - Serial GND
8. acdt
9. audl - Line Out - Left
10. audr - Line Out - Right
11. agnd - Line Out - Common Ground
12. dgnd
13. sgnd

I think...

Please Note however.

if you are using any type of external dock connector, like any after-market male connector, these pin-outs are *reversed*.
Pin 1 of the male connector is located on the left side of the connector.

[joe558]

Please Note however.

if you are using any type of external dock connector, like any after-market male connector, these pin-outs are *reversed*.
Pin 1 of the male connector is located on the left side of the connector.

Not an issue, I understand how to wire it, really just need to make sure of the pins. Still wondering about the other 3 pins....

[Clem-Clone]

Not an issue, I understand how to wire it, really just need to make sure of the pins. Still wondering about the other 3 pins....

which 3?

[joe558]

acdt
dgnd
sgnd

[Clem-Clone]

acdt
dgnd
sgnd

see if this helps.

sgnd appears to be pin 11 Serial GND
dgnd I'll bet is pin 2 - line out GND
acdt = Accessory detect? looks to be pin 21

Pin Signal Description
1 GND Ground (-), internaly connected with Pin 2 on iPod motherboard
2 GND Audio & Video ground (-), internaly connected with Pin 2 on iPod motherboard
3 Right Line Out - R (+) (Audio output, right channel)
4 Left Line Out - L(+) (Audio output, left channel)
5 Right In Line In - R (+)
6 Left In Line In - L (+)
8 Video Out Composite video output (only when slideshow active on iPod Photo)
9 S-Video Chrominance output for iPod Color, Photo only
10 S-Video Luminance output for iPod Color, Photo only
11 GND Serial GND
12 Tx ipod sending line, Serial TxD
13 Rx ipod receiving line, Serial RxD
15 GND Ground (-), internaly connected with pin 16 on iPod motherboard
16 GND USB GND (-), internaly connected with pin 15 on iPod motherboard
18 3.3V 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 (+)
21 Accessory Indicator/Serial enable Different resistances indicate accessory type:
1kOhm - iPod docking station, beeps when connected
10kOhm - Takes some iPods into photo import mode
500kOhm - related to serial communication / used to enable serial communications Used in Dension Ice Link Plus car interface
1MOhm - Belkin auto adaptor, iPod shuts down automatically when power disconnected Connecting pin 21 to ground with a 1MOhm resistor does stop the ipod when power (i.e. Firewire-12V) is cut. Looks to be that when this pin is grounded it closes a switch so that on loss of power the Ipod shuts off. Dock has the same Resister.
22 TPA (-) FireWire Data TPA (-)
23 5 VDC (+) USB Power 5 VDC (+)
24 TPA (+) FireWire Data TPA (+)
25 Data (-) USB Data (-)
26 TPB (-) FireWire Data TPB (-)
27 Data (+) USB Data (+)
Pins 25 and 27 may be used in different manner. To force the iPod 5G to charge in any case, when 'USB Power 5 VDC' (pin 23) is fed, 25 must be connected to 5V through a 10kOhm resistor, and 27 must be connected to the Ground (for example: pin 1) with a 10kOhm resistor.
28 TPB (+) FireWire Data TPB (+)
29,30 GND FireWire Ground (-)

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. pin 1 and 30). In this description NUMBERING is INVERSED: pin 1 is pin 30 and pin 30 is pin 2, so, don't look at numbers on connector.

The remote control, iTalk and other serial devices use Apple Accessory Protocol for communication with 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 1 Stopbit) serial protocol, 19200 baud (higher rates up to 57600 also possible, but speed faster than 38400 may cause problems with large amounts of data), delay of 12 microseconds inserted between end of the stopbit and the beginning of the next startbit (also working 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 +/- shoulde be twisted pairs in cable)

[joe558]

But look up in the post, those pins are already used...

[Clem-Clone]

But look up in the post, those pins are already used...

OK, then I don't know.
where did you get those descriptions?

[joe558]

they are listed as the pinouts for my radio to the iPod port, If I can make certain of the pins I was going to attempt to make the cable I was missing

[Clem-Clone]

Are you then just looking for a line-out from the phone to the input of the radio for audio?

Do you want to charge the iPhone from the radio then too?

[joe558]

its a direct connect type of cable, I can browse and all from the radio

[westy808]

Pardon if this is the wrong thread, or if this has been answered elsewhere. I did do a search, but I am new to this forum, and you guys seem to know what you are talking about. As in... you just don't want to sell me something I don't need.

I am trying to connect an iPhone 3G into my Autocom system for my motorcycle. The iPhone utilizes a 4 contact 3.5mm lead - which is perfect, yet it appears that I need to switch the wiring in the lead around to match-up to my Autocom. Had same problem with Sony Erikson and a Motorola phone, but I was able to find their pinouts online. I suppose this wouldn't be too hard to figure out... but if you guys already know this, any help would be great. I am not so good with wiring myself, but my co-worker is and he'll make my new wire if I tell him what needs to be changed.

Tip:
Ring 1:
Ring 2:
Sleeve:

My Autocom end needs to be in this order:
Tip: Mic
Ring 1: Speaker
Ring 2: 9v power (so unused with iPhone)
Sleeve: Ground

[westy808]

Okay, got'er figured out:

Tip: Right Speaker
Ring 1: Left Speaker
Ring 2: Common
Sleeve - Mic

got my cable made - iPhone now works great with my AutoCom system

gotta give credit to: Apple - Support - Discussions - Four-pin pinout ...

[voltron66]

Are you able to answer or make calls hands free using some VOX software?

iPhone is not much use when you're wearing riding gloves, I have noticed.