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Hello, the board I use is Pinguino MX220 and I was wondering what is the purpose of the second row of digital pins. I tried to connect double digit 7 segment display with the board using con4- first digit segments in the first row and second digit segments in the second row. The final result was two identical digits. Is there any way I can separate D0 for example in two states- 0 for the one pin and 1 for the another? 
Thank you in advance.