Standared HD44780 LCD Blue (20x2)

Specifications:

1. VSS :Then the power ground (0V)
2. VDD :Connected to the positive supply (+ 5V)
3. V0 :LCD Contrast adjustment terminal, connected to the positive supply when the weakest contrast, the highest contrast, will have a "ghosting" when the contrast is too high grounding power, you can adjust the contrast by a 10K potentiometer when using
4. RS :Register selection, select the data register is high, select the instruction register low
5. R / W :Write signal line, a read operation at a high level, a low level write operation. When the RS and RW can be written together for the low instruction or display address, when RS is high for the low RW can be read busy signal, when RS is high for the low RW can write data
6. E :Enable end, when E high jump into a low level, the LCD module execute the command
7. (7-14) DBO-DB7
8. 15 LED-A:Backlight power supply positive
9. 16 LED-K:Backlight power supply negative