



Symbol: JHD162A-FN-R. HD44780 compliant driver. Blacknegative. Backlighting: white LEDs. Character colour: red.
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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.
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 |
The display can be controlled in modes:
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.
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