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| Pin number |
Symbol | Level | I/O | Function |
|---|---|---|---|---|
| 1 | Vss | - | - | Power supply (GND) |
| 2 | Vcc | - | - | Power supply (+5V) |
| 3 | Vee | - | - | Contrast adjust |
| 4 | RS | 0/1 | I | 0 = Instruction input 1 = Data input |
| 5 | R/W | 0/1 | I | 0 = Write to LCD module 1 = Read from LCD module |
| 6 | E | 1, 1-->0 | I | Enable signal |
| 7 | DB0 | 0/1 | I/O | Data bus line 0 (LSB) |
| 8 | DB1 | 0/1 | I/O | Data bus line 1 |
| 9 | DB2 | 0/1 | I/O | Data bus line 2 |
| 10 | DB3 | 0/1 | I/O | Data bus line 3 |
| 11 | DB4 | 0/1 | I/O | Data bus line 4 |
| 12 | DB5 | 0/1 | I/O | Data bus line 5 |
| 13 | DB6 | 0/1 | I/O | Data bus line 6 |
| 14 | DB7 | 0/1 | I/O | Data bus line 7 (MSB) |