This is a 1.3" IPS LCD full-color display with a high resolution of 240 x 240 pixels and a wide viewing angle ±80°. It is driven by ST7789, with SPI interface.
Size: 1.3 inch
Display Area: 23.4x23.4mm
Interface: SPI 4 wires
Viewing Direction: ±80°
*Note that the module does not have a 3.3V regulator on it and so must be powered from 3.3V.
GND - Connect to system ground. This ground needs to be in common with the MCU.
VCC - Connect to 3.3V. This can come from the MCU or separate power supply.
SCL - Connects to SPI SCL (Clock)
SDA - Connect to SPI MOSI (Data)
RES - Reset for the ST7789 LCD controller. Normally HIGH, pull LOW to reset
DC - Data / Command. Determines type of data being sent to the display. LOW = Command, HIGH = Data
BLK - Backlight Control. If left unconnected, the backlight is always on. Pull LOW to turn off
Usage with Arduino
Specification & Datasheet