ST7789 Chip 1.3″ Inch 240*240 RGB TFT IPS 7pin LCD Module

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.