• The I2C module makes connection and programming a display easy. It translates the data received from the I2C Bus into parallel data that is required for the LCD Display. The I2C interface module will let you realize data display with only 2 wires.
• Flexibility in connections | Reduces overall wirings | Can have 8 modules on a single I2C bus | Backlight can be enabled or disabled
• LxWxH : 80 x 36 x 15 mm
• This module makes connection and programming a display quick and easy. The Inter-integrated Circuit (I2C/IIC) is a two-wire short distance communication protocol. It can be used with multiple slave devices in the same two wires with one or more master controllers.
• Operating Voltage : 5V Chip : PCF8574 I2C chip Compatibility : 16×2 LCD Wires required : 2

DESCRIPTION

This is a RoHS compliant I2C Serial LCD Daughter board that can be connected to a standard 16×2 or 20×4 Character Display Module that supports 4-bit mode and nearly all commercially available 16×2 and 20×4 line character modules support it too.

This board has a PCF8574 I2C chip that converts I2C serial data to parallel data for the LCD display. There are many examples on the internet for using this board with Arduino. Do a search for “Arduino LCD PCF8574“. The I2C address is 0x3F by default, but this can be changed via 3 solder jumpers provided on the board. This allows up to 3 LCD displays to be controlled via a single I2C bus (giving each one it’s own address).

I2C is a serial protocol for a two-wire interface to connect low-speed devices like microcontrollers, EEPROMs, A/D and D/A converters, I/O interfaces and other similar peripherals in embedded systems. … The initial I2C specifications defined a maximum clock frequency of 100 kHz.