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iPod Connector Signals




Pin # Signal Description Pin # Signal Description
1

Ground

16

USB Ground (Black wire)

2

Audio Ground

17

Reserved

3

Line Out, Right Channel

18

3.3-Volt Power Output

4

Line Out, Left Channel

19

FireWire Power, 9-15 VDC

5

Line In, Right Channel

20

FireWire Power, 9-15 VDC

6

Line In, Left Channel

21

Accessory ID (Resistor to ground)

7

(Video Ground)

22

FireWire Data TPA-

8

Composite Video Out

23

USB Power +5 VDC (Red wire)

9

S-Video Chrominance Out

24

FireWire Data TPA+

10

S-Video Luminance Out

25

USB D- (White wire)

11

Serial Ground

26

FireWire TPB-

12

TxD Output, Serial Data from iPod

27

USB D+ (Green wire)

13

RxD Input, Serial Data to iPod

28

FireWire Data TPB+

14

Reserved

29

FireWire Ground

15

Ground

30

FireWire Ground



NOTES:
Serial port voltage level is 0V to 3.3V (not-inverted, idle 3.3V, active 0V).
Communication setting is 8N1, 8 data bits, no parity, 1 stop bit.
The auto-baud detect range is 9600 to 57.6K, 19.2K baud is more frequently used.
Pins 8, 9, 10 14, 17, 22, 24 and 26 are missing in the iPhone dock connector.



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Posted: August 6, 2007 - - - - Last Update: January 1, 2013