The PCB fully finished now and I created a test code for MSP430 (it is still bumpy a little bit and ~600Byte). It working quite well but the brightness is not to high. Actually in theory it has 12mA current per segment what I don't want to increase for testing (In theory I can increase it ot 20-25mA. The LEDs are capable to handle 100mA with 1/10 fill factor but the MCU don't). So I've 33ohms current limiting resistors what finally can be decreased to 22ohms: (3V - 2,2V) / (2 * 22) = 18mA.