Signals with grey background may not exist on some docking stations.
(*) Stepped up to provide +5 VDC on iPod Camera Connector.
(**) Resistances indicate accessory type:
- 1kΩ: docking station, beeps when connected
- 10kΩ: takes some iPods into photo import mode
- 6.8kΩ: Serial port mode. TX-RX are 3.3V TTL level (requires MAX232 to convert to RS232).
Setting is 8N1 (8 bits, no parity, 1 stop bit), auto-baud range 9600 to 57.6K
- 68kΩ: iPhone 3g / iPod Touch send audio through line-out without any messages
On the Nano 5G connecting the resistor will disable the audio redirection accomplished by connecting pin 11 to ground.
- 500kΩ: used to enable serial communications. Used in Dension Ice Link Plus car interface
- 1MΩ: Belkin auto adaptor, iPod shuts down automatically when power is disconnected.
(***) Pins 25 and 27 may be used in different manner:
- To charge an iPhone 3G, 3GS, 4 / iPod Touch 2nd gen, 3rd, 4th or Ipod Classic (6th Gen), usb data- (25) should be at 2.8v, usb data+ (27) should be at 2.0v.
- It's also possible to charge iPod and iPhone connecting the +3.3v output (18) to USB Data + (27) through a 47kΩ resistor, and the USB Data- (25) through a 47kΩ resistor to the USB Power source +5v (23). This way the USB function is still useable for normal.
- 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 10kΩ resistor, and 27 must be connected to the Ground with a 10kΩ resistor.
- To charge iPod Nano pins 25 and 27 should be tied together and then connected to 5V power through to a 10K ohm resistor.