Feature

●LCD Display: 20 characters x 4 lines display character LCD module
●Backlight for clear visibility at night. It is displayed in black letters on the green background and can be connected to variable resistance to adjust the contrast
●[I2C Serial I/F] A module that converts parallel signal interface to I2C by attaching to the character LCD module. It is not only compatible with the 2004 type but also the 1602 type
●If you do not need a backlight, you can remove the jumper pins. It can also be used as a general purpose expansion IO
●Package: 1 x LCD2004 character display module; 1 x I2C serial interface module

[Blue]



[Green]




Description

Specifications:

LCD Display:
Operating Voltage: 5V
Interface IC: HD44780
Display: 20 characters x 4 lines
Backlight Color: Green
Letter Color: Black
Contrast Adjustment: Pin 3
Size:90x60x11mm

I2C Serial I/F:
Operating Voltage: 5V
Chip: PCF8574
I2C address: default 0x27, can be changed from 0x20-27
Pins: GND, VCC, SDA, SCL
Pin connection: GND-GND, VCC-5V, SDA-A4, SCL-A5
Semi-fixed Resistance, Contrast Adjustable
Size:41.5x19x15.3mm

LCD Display Pin Assignment:
Pin 1: GND
Pin 2: Power Supply (+5V)
Pin 3: Contrast Adj--Connect to VDD-VSS for voltage adjustment in VR
Pin 4: Register Select--0 for Command Issue, 1 for Data Transfer.
Pin 5: Read/Write--Read: High, Write: Low
Pin 6: Enable Signal--Usually keep it low and give a Positive pulse when sending or receiving
Pin 7-14: Data Bit0-Bit7--8-bit mode
Pin 15: Backlight Power Plus--Connect to VDD
Pin 16: Backlight Power Supply Negative -- VSS Connected.

I2C serial interface address support:
A0 A1 A2 I2C Address
0 0 0 0 0x20
1 0 0 0x21
0 1 0 0x22
1 1 0 0x23
0 0 1 0x24
1 0 1 0x25
0 1 1 0x26
1 1 1 0x27

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