8.2 DB0~DB7 CS1 R/W Ao CL Vss Vdd Vee E RES CS2 A K Overall Size View Area Dot Size Dot Pitch PIN ASSIGNMENT Pin no. 1 2 3 4 5 6 7 8 9 10-17 18 19 20 Symbol Vss Vdd Vo A0 CS1 CS2 CL E R/W DB0-DB7 RES A K Function Power supply(GND) Power supply(+) Contrast Adjust Command / data input Chip select driver 1 Chip select driver 2 External clock input Enable singnal Data read / write Data bus line Reset Power supply for LED B/L (+) Power supply for LED B/L ( ) m o .c U 4 t e e h S a t a .D w w w .