The 3rd generation iPod introduced a new headphone and remote connector, which carries audio data and remote control data to the iPod. The remote control data is sent via a serial Apple Accessory Protocol.
Note, on the iphone, itouch, ipad devices, the base ring is used for microphone input.
| Wire Color in cable |
Generation 2 |
Generation 3 |
Signal |
| black | Tip |
Tip |
Audio, left |
| white | pin 2 Ring (Next-to-tip) |
R1 Ring |
Audio, right |
| red | pin 3 Ring (3rd ring from end) |
R2 Ring |
Audio ground |
| green | Sleeve (4th ring from end) |
pin 1 |
Serial RxD |
| blue | inner ring |
pin 4 |
Power to remote, +3.3v |
| yellow | outermost ring |
pin 3 |
Digital ground |
| pin 2 |
Serial TxD |
||
| sl - Sleeve |
Video out on iPod photo and 5 gen iPod |
Serial lines are TTL and not compatible RS232 levels - can not be connected directly to PC.
PC 9 pin D-SUB --------------------- iPOD special connector


