1602 standard 16-pin interface, including:
Pin 1: VSS is the ground power LCD 16X2 1602 Green 2 feet: VDD then 5V positive power supply.
3 feet: V0 LCD contrast adjustment end, then the positive power supply when the contrast is the weakest, the highest contrast when grounded power, the contrast is too high will have a “ghosting”, when used by a 10K potentiometer to adjust the contrast.
4 feet: RS for the register selection, high-level data register selection, low-level instruction register selection.
5 feet: R / W for the read and write signal lines, high-level read operation, low-level write operation.
6th foot: E end is enable end, when E end jumps from high level to low level, the liquid crystal module carries out the order.
7 ~ 14 feet: D0 ~ D7 for the 8-bit bidirectional data lines.
15 feet: the positive power supply backlight
16th foot: backlight power negative

LCD 16X2 1602 Green About

• Only 2 Arduino pins are occupied (Use I2C interface).
• Supports standard I2C mode (100Kbit/s) and fast I2C mode (400Kbit/s).
• Compatible with multiple communication logic levels: 2.8~5VDC.
• Arduino library supported, use a line of code to complete the display.
• Integrate 7 sizes of ASCll fonts, 5 graphics functions.
• Provide dedicated picture data convert software (Bitmap Converter).
• Most of the complex operation is processed by I2C_LCD independent controller, saving user controller resources.
• Supports cursor function, can set up 16 cursor flicker frequency.
• Supports 128 level backlight lightness adjustment.
• 4 symmetrical fixed hole design for easy user installation.
• Support 64 level screen contrast adjustment.
• Support device address modification.
• Compatible with Grove interface and 4Pin-100mil interface
• Supports 127 I2C_LCD work in parallel
• When debugging code, it can take the place of the serial monitor to monitor the program running state.
• Two abnormal recovery methods are provided: reset and restore the factory settings.