HD44780 Pin |
Function |
Arduino 1 |
Arduino 2 |
1 |
GND |
GND |
|
2 |
VCC |
VCC |
|
3 |
Contrast in (wiper of 10k contrast pot) |
external |
|
4 |
RS (RS a.k.a. Data/Instruction) |
digital 7 |
digital 8 |
5 |
RW (Read/Write) |
GND |
|
6 |
EN (Enable) |
digital 8 |
digital 9 |
7 |
D0 |
- |
|
8 |
D1 |
- |
|
9 |
D2 |
- |
|
10 |
D3 |
- |
|
11 |
D4 |
digital 9 |
digital 4 |
12 |
D5 |
digital 10 |
digital 5 |
13 |
D6 |
digital 11 |
digital 6 |
14 |
D7 |
digital 12 |
digital 7 |
15 |
Backlight VCC |
VCC |
|
16 |
Backlight GND |
GND |
|
| Arduino 1 | Arduino 2 |
LiquidCrystal lcd(7, 8, 9, 10, 11, 12); |
LiquidCrystal lcd(7, 8, 9, 10, 11, 12); |