# Arduino Mega Arduino LCD1602 Keypad shield wiring ## Introduction This shield consists of three logical parts: - 1602LCD with HD4780 Dot Matrix Liquid Crystal Display Controller/Driver. - 6 button keypad. - Analog pins, 5V and GND pass through.
## Wiring illustration ![Arduino Mega LCD1602 Keypad shield wiring LCD part.png](Arduino-Mega-LCD1602-keypad-shield-wiring.png) Author: [Lauri Võsandi](http://lauri.võsandi.com/arduino/lcd1602-key-shield.html#hd44780) ## Wiring table | Signal | ATMega2560 port and pin | Arduino Mega 2560 pin | LCD 1602 Keypad shield | 1602 LCD pin | HD44780 pin | | --- | --- | --- | --- | --- | --- | | **LCD** | | | | | | Data bus DB4 | PORTG pin 5 | Digital pin 4 | 4 | 11 | DB4 | | Data bus DB5 | PORTE pin 3 | Digital pin 5 | 5 | 12 | DB5 | | Data bus DB6 | PORTH pin 3 | Digital pin 6 | 6 | 13 | DB6 | | Data bus DB7 | PORTH pin 4 | Digital pin 7 | 7 | 14 | DB7 | | Select register RS | PORTH pin 5 | Digital pin 8 | 8 | 4 | RS | | Start read/write E | PORTH pin 6 | Digital pin 9 | 9 | 6 | E | | Backlight control | PORTB pin 4 | Digital pin 10 | 10 | 16 | - | | Backlight 5V (via variable resistor ) | - | - | - | 3 | - | | **Keypad** | | | | | | Buttons (select, up, right, down and left) | | Analog pin 0 | 0 | - | | Reset button | - | RESET | RESET | - | | **Pass through** | | | | | | Analog A1 .. A5 | | Analog pin 1 .. 5 | Analog pin 1 .. 5 | - | | **Common** | | | | | | 5V | - | 5V | VCC | 2 and 15 | Vcc | | Ground (GND) | GND | GND | pin 1 | GND | GND |