iPhone 3G Charging Specifications

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iPhone 3G Charging Specifications

Hello,

can anybody give me please the specifications for iPhone 3G charging via USB ?

I want to know how much mA and how much voltage must be applied to the USB Pins 1 to 4 (data data and two for +-) to let the iPhone 3G start the charging mode!

Thanks;)

Message was edited by: V3r0x

iPhone OS 3.0.1, Win xp

Posted on Jan 17, 2010 5:03 AM

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Answer 1

V3r0x Author

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Jan 17, 2010 7:19 AM in response to V3r0x

anyone got an idea ?

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Answer 2

wjosten

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Jan 17, 2010 7:38 AM in response to V3r0x

Here ya go:

http://www.allpinouts.org/index.php/AppleiPod_-_iPhonedock

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Answer 3

V3r0x Author

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Jan 17, 2010 8:41 AM in response to wjosten

thanks but whats the difference between pin 1 and pin 11

23 5 VDC ➕
25 Data ➖ USB Data ➖
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.
11 Serial GND
1 GND Ground ➖

i think with my +- data , data usb cable i have to use pins 25,27,23 and 1 ?
especially on iphone 3G @ 5V and 500 mA ....

i am right ?

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Answer 4

wjosten

Level 10

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Jan 17, 2010 8:56 AM in response to V3r0x

V3r0x wrote:
thanks but whats the difference between pin 1 and pin 11

This might better explain the difference:

http://devdot.wikispaces.com/IphoneSerial+PortTutorial

What am I missing here? Why don't you just get a proper USB cable & plug it into an AC outlet?

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Answer 5

V3r0x Author

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Jan 17, 2010 9:10 AM in response to wjosten

outch i think that tutorial is a bit too hard for me to do.

in my project i just thought that i will have 5V on + and - cables of usb cable and then a voltage of 2-2,8 on the two other datacables. After soldering that together i will dock the female with the male cable of iphone 3G and i supposed it to work

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