LCD TWI/I2C Interface Module

Description

This module is a TWI/I2C driver for a standard LCD. LCDs are controlled through a parallel connection, which requires many pins from your microcontroller. This interface module accepts commands from the host via TWI/I2C and it controls the LCD through the parallel connection. This reduces the required number of pins to control the LCD from 6 (or more) down to 2 (SDA, SCL).

Technical Specs

• Supply Voltage: 5 V
• Interface Protocol: TWI/I²C
• Works with LCDs based on the Hitachi HD44780 (or a compatible) Chipset
• Contrast Adjustment
• Backlight Enable/Disable

Resources

• Arduino I2C Liquid Crystal Library
• PCF8574T Port Expander Datasheet