Product description: LCD display 2x16 black and white characters
The display is often used because of its low price and high availability. One of the main advantages is the ease of operation.
Display specification
- LCD display 2x16 characters,
- Driver: SPLC780D compatible with HD44780
- Black negative
- Backlight: white LEDs, white characters
- Module size : 80 x 36 x 12 mm
- Character size: 2.95 x 4.35 mm
- Operating temperature range : -20 to +50 degrees C
A detailed description and a library for microcontrollers AVR is available on the following page: link.
Dimensions and outputs of display
| No. | Name | Description |
|---|---|---|
| 1 | VSS | Weight |
| 2 | VDD | +5V |
| 3 | V0 | Contrast |
| 4 | RS |
Selection of display instruction register (low) or data register (high) |
| 5 | R/W | Read (low) / Write (status high) |
| 6 | E | Unlock display |
| 7 | DB0 |
Data bus. |
| 8 | DB1 | |
| 9 | DB2 | |
| 10 | DB3 | |
| 11 | DB4 | |
| 12 | DB5 | |
| 13 | DB6 | |
| 14 | DB7 | |
| 15 | LEDA | Backlight +5V |
| 16 | LEDK | Mass illumination |
Display management
The display can be controlled in the following modes:
- 8-bit without busy flag read for transmission of the desired eight data bus lines and two control lines (RS, E - RW is connected to ground).
- 8-bit with busy flag read for transmission of the desired eight data bus lines and three control lines (RS, E, RW).
- 4-bit with busy flag read for transmission of the desired four lines of data bus and three control lines(RS, E, RW).
- 4-bit without busy flag for transmission of the desired four lines of data bus and two control lines (RS, E - RW is connected to ground)).
The most frequently selected method of communication is the mode 4-bit without busy flag read. Sending a half-byte allows you to save valuable I/O microcontroller - only four data lines are beign used (8-bit captured eight of them). No busy flag read introduces the need to use software delays, but allows you to save even a single line - R/W. Pins can be connected on a permanent basis to the ground, because the data will be transported to the display in one direction only.
Useful links |
