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Parameters
- LCD display 2x16 characters,
- Driver: SPLC780D compatible withHD44780
- Black negative
- White LED backlighting, green characters
- Module size : 80 x 36 x 12mm
- The dimensions of the sign: 2.95 x 4.35mm
- Operating temperature range : -20 .... +50 degrees C
Description
Display often used due to its low price and high availability. One of the main advantages is simple operation.
A detailed description and library for AVR microcontrollers can be found at: link.
Dimensions and outputs
| No. | Name | Description |
| 1 | VSS | Mass |
| 2 | VDD | Power supply +5V |
| 3 | V0 | Contrast |
| 4 | RS |
Selection of the display instruction register (low state) or data register (high) |
| 5 | R/W | Reading (low state) / Recording (high state) |
| 6 | E | Unlocking the display |
| 7 | DB0 |
The data bus. |
| 8 | DB1 | |
| 9 | DB2 | |
| 10 | DB3 | |
| 11 | DB4 | |
| 12 | DB5 | |
| 13 | DB6 | |
| 14 | DB7 | |
| 15 | LEDA | Backlight power supply +5V |
| 16 | LEDK | Mass of the backlight |
Control
The display can be controlled in modes:
- 8-bit without reading the occupancy flag - eight data bus lines and two control lines (RS, E - RW connected to ground) are required for transmission.
- 8-bit with reading the occupancy flag - eight data bus lines and three control lines (RS, E, RW) are required for transmission.
- 4-bit with reading the occupancy flag - four data bus lines and three control lines (RS, E, RW) are required for transmission.
- 4-bit without reading the occupancy flag - four data bus lines and two control lines (RS, E, RW connected to ground) are required for transmission.)
The most common way of communication is 4-bit mode without reading the occupancy flag. Sending half a byte saves valuable I/O outputs of the microcontroller - only four data lines are used (eight are occupied in 8-bit mode). Not reading the occupancy flag makes software delays necessary, but saves another line - R/W. This pin can be permanently connected to the ground, as the data will only be transported in one direction, to the display.
