LCD DISPLAY-16x2
Generally, these are small size displays
and are mainly used in embedded products such as Coin box,
Digital Energy meters, calculators, etc. These are different sizes in width
like 16x1 LCD, 16x2 LCD, 16x4 LCD.
16x2 means
16- Rows and 2-columns, so it can print up to 32 characters. It has a 5x8 dot
matrix to print a single character, so for a single character, it
takes 5x8=40 pixels and for 32 characters it has 40x32=1280 pixels.
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| LCD Module 16x2 |
 |
| LCD-Module-16x2 |
Features
- Operating Voltage: 4.5v-5.5v
- Output maximum current: 5ma
- Total pins: 16
- Built-in controller (HD44780 or Equivalent)
- Back led color: Blue, Green, Yellow.
- Rows /column: 16x2
- Total characters: 16
- Alphanumeric LCD display
- It can operate in an 8-bit or 4-bit data mode.
- 5x8 dot matrix for character representation
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| LCD_Pin_Diagram |
Pin configuration
|
1 |
Vss |
Ground |
|
2 |
Vcc/Vdd |
5v(Positive terminal) |
|
3 |
VE |
Contrast (brightness
adjustment) |
|
4 |
RS |
Register Select (to
select Data mode or command mode) |
|
5 |
R/W |
Read / Write Operation |
|
6 |
EN |
Enable |
|
7 |
D0 |
Data pin 0 |
|
8 |
D1 |
Data pin 1 |
|
9 |
D2 |
Data pin 2 |
|
10 |
D3 |
Data pin 3 |
|
11 |
D4 |
Data pin 4 |
|
12 |
D5 |
Data pin 5 |
|
13 |
D6 |
Data pin 6 |
|
14 |
D7 |
Data pin 7 |
|
15 |
A |
Anode (Backlight
positive terminal) |
|
16 |
K |
Cathode (Backlight negative terminal) |
Power supply pins
- Vdd – is the power supply positive pin
- Vss – is the power supply negative pin
- A – Anode terminal (positive terminal of Back Light LED)
- K – Cathode terminal (Negative terminal of Back Light LED)
Contrast pin
 |
| LCD-Brightness |
By adjusting the voltage across this pin brightness will be adjust.
Control pins
- RS – Register select, it is useful to select the command mode or data mode of the operation, RS=0 for command mode, whereas RS=1 for data model.
- R/W – To perform the Read and write operation (Write Operation is an active LOW signal)
- En –Enable pin, we can assign the instructions by triggering the Enable pin.
Data pins
D0-D8 = Usually it has 8-data pins. It supports two modes of
operations.
- 8-bit data mode
- 4-bit data mode
You can select any one of the modes by using the commands, and there is
no effect on performance.
Commands
|
Sr. No |
Code |
Command description |
|
1 |
0x01 |
Clear display screen |
|
2 |
0x02 |
Return home |
|
3 |
0x04 |
Decrement cursor (shift cursor to left) |
|
4 |
0x06 |
Increment cursor (shift cursor to right)/Entry mode |
|
5 |
0x05 |
Shift display right |
|
6 |
0x07 |
Shift display left |
|
7 |
0x08 |
Display off, cursor off |
|
8 |
0x0A |
Display off, the cursor on |
|
9 |
0x0C |
Display on, cursor off |
|
10 |
0x0E |
Display on, a cursor on |
|
11 |
0x0F |
Display on, cursor blinking |
|
12 |
0x10 |
Shift cursor position to left by one character |
|
13 |
0x14 |
Shift cursor position to right by one character |
|
14 |
0x18 |
Shift the entire display to the left |
|
15 |
0x1C |
Shift the entire display to the right |
|
16 |
0x80 |
Force cursor to the beginning ( 1st line) |
|
17 |
0xC0 |
Force cursor to the beginning ( 2nd line) |
|
18 |
0x38 |
2 lines and 5×7 matrix |
|
19 |
0x28 |
1 Line and 5x7 matrix |
HOW TO USE LCD?
HOW TO IMPLEMENT LCD PROGRAM?
Applications
- Digital Energy meters
- Telephone Coin boxes.
- Gaming devices
- Calculators
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