1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2448 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 251DIR 1B1 1B2 GND 1B3 1B4 V CCB 1B5 1B6 GND 1B7 1B8 2B1 2B2 GND 2B3