The ST7789 1.3″ 240×240 RGB TFT IPS LCD Module offers a compact, high-resolution display solution with vibrant colors and wide viewing angles. Featuring the ST7789 driver IC and a 7-pin SPI interface, it’s ideal for integration into embedded systems, IoT devices, and wearable technology.
Specifications:
Display Type: 1.3 inch TFT LCD
Resolution: 240×240 pixels
Aspect Ratio: 1:1
Display Colors: Full RGB, 65K to 262K colors
Driver IC: ST7789
Viewing Angle: IPS, wide-angle (up to 178°)
Backlight: LED backlight (white)
Module Size: Approx. 24.8mm x 24.8mm x 2.42mm (dimensions can vary slightly depending on the module version)
Active Area: 23.4mm x 23.4mm
Pixel Pitch: 0.0975mm x 0.0975mm
Interface:
Communication Interface: SPI (Serial Peripheral Interface)
Pin Count: 7-pin
Pin Description:
GND: Ground
VCC: Power Supply (typically 3.3V)
SCL: Serial Clock
SDA: Serial Data (MOSI for SPI)
RES: Reset Pin
DC: Data/Command Pin (also known as A0)
BLK: Backlight Control (can be connected to GND for always-on)
Power Supply:
Operating Voltage: 3.3V (nominal, some versions may support 5V with level shifting)
Backlight Supply Voltage: 3.0V – 3.6V
Operating Current: Approx. 25mA (varies with backlight intensity)
ST7789 Controller:
Controller Features:
Supports 16-bit (RGB 5-6-5) or 18-bit (RGB 6-6-6) color depths.
Supports display inversion, partial display, and sleep modes.
Built-in frame buffer (240×240 pixels).
SPI clock up to 15-20 MHz (dependent on specific module design).
Display inversion (inverted and normal display modes supported).
Display partial on/off.
Adjustable brightness via PWM (Pulse Width Modulation).
Low power consumption.
Mechanical Characteristics:
Operating Temperature: -20°C to +70°C
Storage Temperature: -30°C to +80°C
Weight: Approx. 3g (varies with specific module)
Performance Characteristics:
Refresh Rate: Fast enough to support smooth animation.
Response Time: Typically 10ms to 20ms.
Contrast Ratio: Around 800:1 or better (depending on the backlight and polarization used).
Applications:
Wearables (smartwatches, fitness trackers)
Small displays in IoT devices
Portable electronic gadgets
Compact interfaces for embedded systems
Programming Considerations:
SPI Control: The ST7789 uses a simple command-based system, where instructions are sent via SPI to control the various display functions (e.g., initialization, pixel write, color depth setup).
Graphics Libraries: This display is compatible with popular microcontroller graphics libraries such as Adafruit GFX, TFT_eSPI, etc.
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