Ueber den bin ich heute mal "gestolpert" und fand einige Moglichkeiten wie USB-Keyboard oder USB-Midi und USB-Flash gut....
da wird einfach ueber die Firmware die Funktion festgelegt 
http://www.hobbytronics.co.uk/usb-host-board-v2
USB Host Controller Board V2.2
http://www.hobbytronics.co.uk/usb-host/usb-host-mini
USB Host Mini
http://www.hobbytronics.co.uk/usb-host-midi
http://www.hobbytronics.co.uk/usb-host/usb-host-keyboard
http://www.hobbytronics.co.uk/usb-host/usb-host-flash-drive
The USB Host Board is based around the Microchip 24FJ64GB002 microcontroller which contains a built-in full-speed USB host controller. This allows the board to interface with and control any USB slave device - flash drives, keyboards, digital cameras, PS3 game controllers, and much more!
The USB Host board is designed to be as simple to use as possible. All of the complex USB programming is contained in the microchip so there is NO USB coding required in your application. This saves valuable programming space and saves you from having to code and debug USB interface routines. The onboard microcontroller has a bootloader and is easily updatable with any of our free USB Host driver software.
Features
Complete USB Software onboard. No USB coding required on your microcontroller
Simple UART and I2C interface
Easily updatable software includes
Flash Memory Stick - Read and Write data to files on a USB flash drive
USB Keyboard - Converts a standard USB keyboard into a serial TTL device generating ASCII characters
USB Joystick - Reads the control inputs and button presses from a USB Joystick. Data available via serial connection or using I2C. Great for robot projects
CDC Communications Class - Allows you to connect a CDC class device to the Host Board and send and receive data to the device via a serial connection (e.g. Mobile Phones, fax machines, two way radios etc)
USB Mouse - Read the movement and button clicks of a mouse via Serial TTL and I2C.
PS3 Dual Shock Controller - Read the Joysticks, accelerometer, button pressure and buttons of a PS3 Dualshock Controller via Serial TTL and I2C. Set the LEDs and rumble motors.
FTDI Serial Driver - Allows you to connect a serial device that uses an FTDI USB chipset to the Host Board and send and receive data.
MIDI Device - Allows you to connect a MIDI device to the USB Host Board for 2-way communication using the MIDI message protocol
See Related Products tab for more details on software available
Easy to update the software using simple serial connection and built-in bootloader
Works with both 5V and 3.3V systems
Real Time Clock
One-board 3.3V 250mA regulator with output
Green POWER LED
Red LED indicates bootloader active or Error
Blue LED indicates device plugged in and accepted
All pins are 5V tolerant so will work with 5V and 3.3V microcontrollers.
Board size 38mm x 27mm
