GND13V32EN3IO44IO55IO66IO77IO08IO19IO810IO1011IO1112IO1213IO1314IO915IO1816IO1917IO2018IO2119IO2220IO2321NC22IO1523RXD024TXD025IO326IO227GND28GND29GND30GND31GND32GND33GND34GND35GND36GND37