原创 ipad dock connector接口定义，平板电脑连接器兼容设计的请参考

 2011-8-10 18:05  5896 27 28 分类: 消费电子

iphone ipad dock connector 接口定义揭秘

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 (-)