 Used in 3rd and later generation iPods for charging, connecting to a PC via USB or Firewire, to a stereo via line-out, to a serial device (controlled via the Apple Accessory Protocol). This connector exists in most Apple iPod MP3 players (iPod 3G, 4G, 5G Video, 5.5G Video, Nano (1G, 2G, 3G, 4G), Mini, Classic, Touch, Touch 2G, and iPhone (1G, 3G and 3GS))
上面是用于iphone和ipad的HDMI转接线 
上面是用于iphone 和 ipad 的usb和sd card 转接器 dock connector 定义: 接口排列方式为: 1.2.3.4.5.6.7.8.9...........29.30 内部焊接点排列为: 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
1 Ground (-) 地 *
2 Line Out - Common Ground (-) 线路输出 地*
3 Line Out - R ( ) R声道线路输出
4 Line Out - L ( ) L声道线路输出
5 Line In - R ( ) R声道线路输入
6 Line In - L ( ) L声道线路输入
7
8 Video Out - Composite Video (for ipod colour when slideshow activated) 复合视频输出 (只有彩屏的ipod有效)******
9
10
11 Serial GND RS-232串口 地
12 Serial TxD RS-232串口 TxD
13 Serial RxD RS-232串口 RxD
14
15 Ground (-) 地 **
16 USB GND (-) USB电源负极 **
17
18 3.3V Power ( ) 3.3V电源正极
19 Firewire Power 12 VDC ( ) 1394火线12V电源 正极 ***
20 Firewire Power 12 VDC ( ) 1394火线12V电源 正极***
21 Accessory Indicator 附件识别接口 ****
22 FireWire Data TPA (-) 1394火线数据 TPA(-)
23 USB Power 5 VDC ( ) USB 5V 电源 正极
24 FireWire Data TPA ( ) 1394火线数据 TPA( )
25 USB Data (-) USB 数据(-)
26 FireWire Data TPB (-) 1394火线数据 TPA(-)
27 USB Data ( ) USB 数据( )
28 FireWire Data TPB ( ) 1394火线数据 TPB( )
Pin | Signal | Description | 1 | GND | Ground (-), internally connected with Pin 2 on iPod motherboard | 2 | GND | Audio & Video ground (-), internally connected with Pin 1 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) or Component Video Pb | 9 | S-Video Chrominance output | for iPod Color, Photo only or Component Video Y | 10 | S-Video Luminance output | for iPod Color, Photo only or Component Video Pr | 11 | AUDIO_SW | If connected to GND the iPhone sends audio signals through pin 3-4, otherwise it uses onboard speaker. | 12 | Tx | ipod sending line, Serial TxD | 13 | Rx | ipod receiving line, Serial RxD | 14 | RSVD | Reserved | 15 | GND | Ground (-), internally connected with pin 16 on iPod motherboard | 16 | GND | USB GND (-), internally connected with pin 15 on iPod motherboard | 17 | RSVD | Reserved | 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 6.8 kΩ - Serial port mode. Pin 11-13 are TTL level. Requires MAX232 chip to convert to RS232 levels.
68kOhm - makes iPhone 3g send audio through line-out without any messages
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 Resistor. | 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. iPod 5G can also be forced to charge by attaching the data + and the data - pins to the 5v via a 10k Ohm resistor ( BOTH PINS) and connecting pin 16 to the 5v (ground). (Confirmed working with iPod 5G 20GB). This provides 500mA of current for charging. For quicker charing, up to 1A, see below. 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. This can be done with a few simple resistors: 33k to +5v (23) and 22k to gnd(16) to obtain 2v and 33k to +5v and 47k to gnd to obtain 2.8v. This is a notification to the iphone that it is connected to the external charger and may drain amps from the usb. To charge iPod Nano pins 25 and 27 should be tied together and then connected to a 10K ohm resistor, and the other side of this resistors then needs to be connected to 5v power. It's also possible to charge the iPod's or iPhone's battery to make use the of internal +3.3v output (18) terminal to connect the USB Data + (27) thru a 47k ohms resistor and the USB Data- (25) thru a 47k resistor to the USB Power source +5v (23). This way the USB function is still useable for normal operations and makes it easier the fit in a plug. The resistors are not to critical 2x 150k's still work. | 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 29Pins 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 29 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 +/- should be twisted pairs in cable)
iPod Nano 4th Gen no longer will charge from 12 volts on the firewire pins. If you tie pins 25 and 27 together and then connect a 10K ohm resistor to +/- 5 volts to pins 23 and 15 (or 16) then it will charge. If you don't tie 25 and 27 together, it won't charge.
iPod Touch 3G: may also require for pins 1 and 2 (GND and audio out GND) to be connected in order to output audio (pin 11 to GND). Works with appr. 500 kOhm between pin 21 and GND.
iPod Touch 2G requires pin 11 connected to 15/16, then connect that to pin 21 with a 68kOhm resistor to use the audio line out. This is because the device needs to be told to redirect the signal to the Line Out pins rather than to the built-in speaker. This explains why certain accessories won't work with the iPod Touch 2G and maybe even the iPod Touch 3G. The Nano 5G will require the pin 11 connection but not the 68kOhm resistor for redirecting audio.
Nano 5G: connecting the 68kOhm resistor to ground will disable the audio redirection accomplished by connecting pin 11 to ground.
iPhone headphone (handsfree)Pin
Number | Pin
Name | Description | | 1 | Tip | Left audio | | 2 | Ring | Right audio | | 3 | Ring | Common/Ground | | 4 | Sleeve | Microphone |
Pressing the headset button shorts Microphone to Ground Inserting a 3-pin plug into the iPhone's 4-pin receptacle would also short Mic to Common and the L/R earphones will work correctly. Using 4-pin Headsets provided by certain Phone Carriers also work with the microphone connection and certain remote functions. Using iPod Earphone that use a microphone with a Cell phone may not provide the mic connection, and wil likely use the phone's internal mic instead.
FROM:http://kitarm.com/news/334-iphone-ipad-dock-connector-.html
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发表于 2013-7-25 11:07:00
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