| PIN NO. | SYMBOL | DESCRIPTION | FUNCTION |
| 1 |
VSS |
Ground |
0V (GND) |
| 2 |
VDD |
Power Supply For Logic Circuit |
+3.3V |
| 3 |
V0 |
LCD Contrast Adjustment |
|
| 4 |
RS or CS |
Parallel Mode: Instruction/Data Register Selection Serial Mode: Chip Select |
Parallel Mode: RS = 0 : Instruction Register RS = 1 : Data Register Serial Mode: Active-high |
| 5 |
R/W or SID |
Parallel Mode: Read/Write Selection Serial Mode: Data |
Parallel Mode: R/W = 0 : Register Write R/W = 1 : Register Read |
| 6 |
E or SCK |
Parallel Mode: Enable Signal Serial Mode: Clock |
Parallel Mode: Active-high |
| 7 |
DB0 |
Parallel Mode: Data Bus Serial Mode: NC |
Parallel Mode: DB0-DB7 |
| 8 |
DB1 |
| 9 |
DB2 |
| 10 |
DB3 |
| 11 |
DB4 |
| 12 |
DB5 |
| 13 |
DB6 |
| 14 |
DB7 |
| 15 |
PSB |
Serial/Parallel Selection |
PSB=0 : Serial Mode PSB=1 : 8/4Bit Parallel Bus Mode |
| 16 |
NC |
|
|
| 17 |
RST |
Reset Signal |
Active-low RSTB=0,Display Off, Display From Line 0 |
| 18 |
Vout |
Dual Voltage Output |
Available when VDD=+3.3V |
| 19 |
A |
Supply Voltage For LED+ |
+3.3V |
| 20 |
K |
Supply Voltage For LED- |
0V |