diese beschreibung der used/unused pins ist mir noch untergekommen...
Code:
  •     2    connections for 5V 'hobby' Servos connected    to the Arduino's high-resolution dedicated timer - no jitter!
  •     4    H-Bridges: TB6612 chipset provides 1.2A    per bridge     (3A for brief 20ms peaks) with thermal shutdown protection, 
  •           internal    kickback protection diodes. Can run motors on 4.5VDC to 13.5VDC.
  •     Up    to 4 bi-directional DC motors    with individual 8-bit speed selection (so, about 0.5% resolution)
  •     Up    to 2 Stepper motors (unipolar    or bipolar) with single coil, double coil, interleaved or    micro-stepping.
  •     Motors    automatically disabled on power-up
  •     Big    terminal block connectors to easily hook up wires (18-26AWG) and    power
  •     Arduino    reset button brought up top
  •     Polarity    protected 2-pin terminal block and jumper to connect external power,    for separate logic/motor supplies
  •     Tested    compatible with Arduino UNO, Leonardo, ADK/Mega R3, Diecimila &    Duemilanove. 
  •     Works with Due with 3.3v logic jumper. Works with    Mega/ADK R2 and earlier with 2 wire jumpers.
  •     Download    the easy-to-use Arduino software library, check out the examples and    you're ready to go!
  •     5v or 3.3v compatible    logic levels - jumper configurable.


All 6 analog input pins are available. They can also be used as digitalpins (pins #14 thru 19)

Digitalpin 2, and 13 are not used.
The following pins are in use only if the DC/Stepper noted is inuse:
Digitalpin 11: DC Motor #1 / Stepper #1 (activation/speed control)
Digitalpin 3: DC Motor #2 / Stepper #1 (activation/speed control)
Digitalpin 5: DC Motor #3 / Stepper #2 (activation/speed control)
Digitalpin 6: DC Motor #4 / Stepper #2 (activation/speed control)
The following pins are in use if any DC/steppers are used
Digitalpin 4, 7, 8 and 12 are used to drive the DC/Stepper motors via the74HC595 serial-to-parallel latch
The following pins are used only if that particular servo is inuse:
Digitalspin 9: Servo #1 control
Digital pin 10: Servo #2 control