Here is an album I made that shows the disassembly of the Rezound dekstop dock.
https://picasaweb.google.com/kenc3dan/RezoundDesktopDock?authuser=0&feat=directlink
As you can see the dock does not use the old magnet trick to communicate to the phone which type of dock it is. There are no magnets to be found in the dock at all. Somehow the USB block where the dock joins to the phone contains some sort of hardware trickery to let the phone know "Hey, I'm a desktop dock" versus a car dock. At least, I think so.
Can anyone shed any light on how this is done?
Is it a question of a resistor between two pins?
Is it the bizarro microUSB shield shape that you see in the photos?
I like to build my own docks for my phones and can't get them into any dock mode at all without understanding this mechanism.
https://picasaweb.google.com/kenc3dan/RezoundDesktopDock?authuser=0&feat=directlink
As you can see the dock does not use the old magnet trick to communicate to the phone which type of dock it is. There are no magnets to be found in the dock at all. Somehow the USB block where the dock joins to the phone contains some sort of hardware trickery to let the phone know "Hey, I'm a desktop dock" versus a car dock. At least, I think so.
Can anyone shed any light on how this is done?
Is it a question of a resistor between two pins?
Is it the bizarro microUSB shield shape that you see in the photos?
I like to build my own docks for my phones and can't get them into any dock mode at all without understanding this mechanism.