| ③pin connections |
| pin | symbol | function |
| 1 | vss | ground for logic(0v) |
| 2 | vdd | power supply for logic(+5v) |
| 3 | v0 | power supply for lcd driver |
| 4 | rs | h: data；l: instruction code |
| 5 | r/w | h: read; l: write |
| 6 | e | enable signal |
| 7~14 | db0~db7 | data bus line |
| 15 | led+ | backlight power(+5v) | | | |
| 16 | led- | backlight power(0v) | | | | |