BITalino Freestyle is our most flexible model, in which you need to hardwire the Vcc, Gnd, and Vcc/2 midpoint voltage (when applicable), as well as the output of the sensor to inputs on the MCU.
Note that in this case, you can also easily connect the sensors to any electrically compatible third-party board (e.g. Arduino, or Lilypad). The pinout is available online in the hardware manual:
http://www.biosignalsplux.com/downloads ... anual.html