Para los que os atreveis a jugar con el puerto USB de la Xbox mirar eso:
The USB standard has 4 signals: +5, GND, D+, D-
The Xbox controller connectors have 5 pins - it is assumed (but maybe not yet proven) that the extra pin is +12V for the rumble-pack-vibrator inside the controllers.
Looking head-on at the front of your Xbox, with controller port "1" to the left, and port "4" to the right, if you look into one of the controller ports, you'll see 5 pins along the bottom half of the port (on the center piece of plastic, there's a small triangle on the left side pointing down to the first pin, which I'll call "pin 1":
___________
v
-----------
1 2 3 4 5
("v" denotes the triangle pointing to pin 1)
Here's what signals correspond to each pin:
1 - +5V
2 - D-
3 - D+
4 - ?? (probably +12V)
5 - GND
Pins "1" and "5" are longer than the other pins. This is just like standard USB connectors - the power/GND signals get connected first when you insert a connector, assuring a solid power connection before any of the other signals get connected.
I've actually measured 5V across pins 1 & 5 while the Xbox was powered-on. NOTE: When Xbox is powered-off (but still plugged-in), I read ZERO volts across these two pins - this probably means that it would be impossible to make a remote-control that can power-up the Xbox.
Pins 1 & 5 are common across all 4 connectors (Pin 1 on port 1 is connected to Pin 1 on ports 2/3/4, the same goes for Pin 5 across all 4 ports). This makes sense - it's just a fixed power supply.
Pins 2&3 (USB D-/D+ differential data lines) are separate pairs to each port (this also makes sense - they have to be).
Pin 4 (which is believed to be +12V) is NOT common across all for ports. This (along with the fact I can't measure 12V on it) probably means that it's not just a steady power-supply signal that a controller's rumble-pack can tie-into as needed, but a signal that the main CPU controls independently per port. It may be 12V that gets turned on programmatically, or it could be something else. Whatever it is, this signal seems to go out (on separate pins) off the USB daughterboard onto the main board (whereas the D+/D- pins don't - they go directly to the TI USB controller on the daughterboard).
An additional bit of info (not helpful unless someone wants to hack at the USB daughterboard itself), here's where each ports' D+/D- signals connect onto the TI USB chip:
Port 1's D+/D- go to TI's "DP3/DM3" pins.
Port 2's D+/D- go to TI's "DP4/DM4" pins.
Port 3's D+/D- go to TI's "DP1/DM1" pins.
Port 4's D+/D- go to TI's "DP2/DM2" pins.
Alejo, casi casi seria bueno abrir un foro de desarrollo para la Xbox
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