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1602LCD using a standard 16-pin interface, which:
1st leg: VSS to ground power
2 feet: VDD then 5V positive power supply
3 feet: V0 for the LCD display contrast adjustment end, then, when the contrast is the weakest power supply, ground power when the contrast of the highest contrast ratio is too high will lead to "ghosting", when used by a 10K potentiometer to adjust the contrast of the
4 feet: RS for the register selection, the selection of high data registers, the selection of low-level instruction register.
Section 5 feet: R / W for read and write signal lines, when read high, low level when writing. When the RS and RW can be written together for the low-level 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-pin: E-side order to be able to end, when the E Duanyou high jump into a low, the LCD module execute the command.
7 ~ 14-pin: D0 ~ D7 for the 8-bit bi-directional data line.
15 feet: Backlight power supply positive
16 feet: Backlight power supply negative
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