ST77916 11P 360X360 QSPI 1.53 Inch Round TFT LCD Display Module

ST77916 1.53 Inch Round TFT LCD Display Module (360×360 QSPI) is a cutting-edge display solution optimized for wearable technology and compact user interface designs. This module integrates the high-performance Sitronix ST77916 driver IC, enabling a true circular display area with vibrant color and sharp resolution. Consequently, it eliminates the need for complex rendering tricks to mask unused corner pixels, unlike traditional square displays. Utilizing the fast Quad-SPI (QSPI) interface, the module delivers high-speed data transmission, which ensures rapid screen updates and smooth graphical performance even at 360×360 resolution. Therefore, developers select this 11-pin module when they require a premium, energy-efficient display that provides both exceptional aesthetic appeal and robust technical capability for modern embedded devices.

Key Features:

• True Circular Display: Features a physically round viewing area, which is highly sought after for smartwatches and round gauges.
• High Resolution and PPI: Offers a sharp 360 x 360 resolution packed into a 1.53-inch diagonal, resulting in a high pixel density for detailed graphics.
• QSPI Interface Support: Employs the fast Quad-SPI protocol, dramatically reducing the pin count and increasing the data rate compared to traditional 8-bit or 16-bit parallel interfaces.
• ST77916 Driver IC: Integrates a powerful and efficient driver, which supports deep color depth and advanced display functions.
• Wide Viewing Angle: Utilizes TFT technology optimized for broad viewing angles, ensuring the display remains clear from various perspectives.

Technical Specifications:

• Display Type: a-Si TFT LCD (Thin-Film Transistor Liquid Crystal Display)
• Driver IC: Sitronix ST77916
• Resolution: 360 x 360 Pixels
• Display Size: 1.53 Inches (Diagonal)
• Color Depth: 262K Colors (18-bit RGB)
• Interface Protocol: 4-Line/8-bit Serial Peripheral Interface (SPI) or Quad Serial Peripheral Interface (QSPI)
• Logic Voltage (VCC): 3.3 V (Typical)
• Operating Temperature Range: −20°C to +70°C

Mechanical Specifications:

• Backlight Type: LED White Backlight
• Module Connection: 11-Pin FPC/ZIF Connector (Requires a corresponding FPC connector on the host PCB)
• Screen Shape: Circular Active Area
• Viewing Direction: All viewing angles (Free View)

Dimensions:

• Active Area Diameter: ≈ 38.86 mm
• Module Outer Diameter: Varies by module vendor, typically ≈ 40 mm to 42 mm
• Thickness: ≈ 1.5 mm to 2.5 mm (Extremely thin profile)
• FPC Pin Count: 11 Pins

Pinout and Wiring:

• VCC/VDD: Connect this pin to the 3.3 V power supply (Logic Voltage).
• GND: Connect to the circuit ground reference.
• SCL (SCK): Serial Clock input, drives the QSPI communication clock.
• SDA (MOSI/MISO): Data line for QSPI communication.
• CS: Chip Select, active low signal to enable communication with the driver IC.
• DC: Data/Command Select pin (D/C), distinguishes between data and command packets sent over the interface.
• RES (RST): Hardware Reset, active low signal to initialize the display.
• BL_LED+/BL_LED−: Backlight power supply pins (LED Anode and Cathode), which require current limiting.
• Note: Due to the high data rate of QSPI, furthermore, you must keep all signal lines short and shielded to maintain signal integrity and stable operation.

Datasheet Reference:

• Download Sitronix ST77916 Driver IC Datasheet

Commonly Used in:

• Smartwatches: The primary display component for fitness trackers and circular smartwatches.
• Smart Rings and Jewelry: High-end wearable devices requiring a small, high-resolution circular interface.
• Portable Instrumentation: Used in small, handheld test or monitoring equipment that features graphical gauges.

Applications:

• Graphical User Interfaces (GUIs): Displaying complex menus, icons, and real-time data visualizations in a circular format.
• Digital Gauges: Creating modern, animated, and customizable digital speedometer or meter readings.
• Status Indicators: Providing detailed, high-contrast status and alert messages in compact spaces.

Equivalent Models:

• ILI9488 (Driver IC): While supporting higher resolutions, this common driver often drives similar round displays, however, it typically uses a parallel interface.
• Other Round Display Modules: Modules featuring the GC9A01 or ST7789 driver ICs may offer similar resolution in a round format, but verify the interface compatibility.

Package Includes:

• 1 x ST77916 1.53 Inch Round TFT LCD Display Module (360×360 QSPI)