Alphanumeric Character LCD display. It presents values in two lines, 16 characters each. It is powered by 5V. It is characterized by extremely simple operation, high availability, and numerous support for many microcontrollers.
Product Description: Character LCD display 2×16 characters
Alphanumeric LCD display. It presents values in two lines, 16 characters in each. It is powered by 5V. It is characterized by extremely simple operation, high availability, and numerous support for many microcontrollers.
Product compatible with Arduino
In a standard set of libraries and sample programs downloaded from the Arduino IDE environment, there is the Liquid Crystal library, which allows to operation presented display.
Dimensions and pinout description.
Display pinout description
The alphanumeric display has 12 pins, which are not marked on the board. Each of them corresponds in turn to:
- 1 – VSS – system ground
- 2 – VDD – 5V power supply
- 3 – V0 – contrast
- 4 – RS – select display instruction register (low state) or data register (high state)
- 5 – R/W – read (low state) / write (high state)
- 6 – E – unlocking the display
- 7…14 – DB0…DB7 – data bus
- 15 – LEDA – backlight power supply 5 V
- 16 – LEDK – backlight system common ground
Controlling 2×16 Character LCD module
The display can be controlled in four modes:
- 8-bit without reading the busy flag – eight lines of the data bus and two control lines (RS, E – RW connected to GND) are needed for transmission,
- 8-bit with read busy flag – eight lines of the data bus and three control lines (RS, E, RW) are required for transmission,
- 4-bit with a readout of the busy flag – for transmission four lines of the data bus and three control lines are needed (RS, E, RW),
- 4-bit without readout of the occupancy flag – for transmission four lines of the data bus and two control lines are needed (RS, E – RW connected to ground).
The most often chosen communication mode is the 4-bit mode without reading the busy flag. Sending half a byte saves valuable I/O pins of the microcontroller – only four data lines are used (in 8-bit mode eight of them are occupied). Not reading the busy flag makes it necessary to use software delays, but saves another line – R/W. This pin can be permanently connected to the ground because data will be transported only one way – to the display.
The display – rear view.
Technical Specification of the display
- Type: alphanumeric LCD display
- Supply voltage: 5 V
- Backlight Yellow-Green, black characters (According to your choice)
- Backlight Blue, and white characters (According to your choice)
- Operating temperature range: from -20°C to 70°C
- Dimensions of one character: 2.45 x 5 mm
- Module dimensions: 80 x 36 mm
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