Introduction
This manual provides comprehensive instructions for the Estardyn 1.53-inch Round TFT LCD Display module. Designed for integration into smart watches, DIY electronics projects, and other embedded systems, this module features a vibrant color display with a 360x360 resolution and utilizes the ST77916 driver IC with a QSPI interface for efficient data communication. Please read this manual thoroughly before installation and operation to ensure proper use and optimal performance.
Specifications
The following table details the technical specifications of the Estardyn 1.53-inch Round TFT LCD Display module:
| Feature | Description |
|---|---|
| Display Size | 1.53 inches |
| Resolution | 360 x 360 pixels |
| Display Type | TFT LCD, Round |
| Driver IC | ST77916 |
| Interface Type | QSPI |
| Display Color | Colorful |
| Power Supply | 3.3V - 5V |
| Working Temperature | -20°C to 70°C |
| Linking Method | COG (Chip-on-Glass) |
| Screen Size (mm) | 40.46 x 41.96 x 2.16 |
| Module Size (mm) | 41.5 x 49.32 x 3.36 |
| Display Area (mm) | 38.156 x 38.156 |
Pin Definition
The module features an 11-pin interface. The function of each pin is described in the table below:
| PIN | SYMBOL | FUNCTION |
|---|---|---|
| 1 | GND | Power ground |
| 2 | VCC | Analog power voltage (3.3V-5V) |
| 3 | SCL | Clock signal for QSPI interface |
| 4 | SDA | Data signal for QSPI interface |
| 5,6,7 | I01, I02, I03 | QSPI interface: second data pins |
| 8 | RST | Display reset pin (active low) |
| 9 | CS | Chip select signal (active low) |
| 10 | BL | Backlight control pin |
| 11 | TE | Frame synchronization signal |
Setup and Installation
Follow these steps to properly set up and install your Estardyn 1.53-inch Round TFT LCD Display module:
- Prepare Your Development Board: Ensure your microcontroller or development board (e.g., Arduino, ESP32, Raspberry Pi) is powered off before making any connections.
- Identify Connection Points: Locate the corresponding QSPI, power, and control pins on your development board. Refer to the Pin Definition table above for the module's pin functions.
- Connect Power: Connect the module's VCC pin (Pin 2) to a 3.3V or 5V power supply on your development board, and the GND pin (Pin 1) to the ground. Ensure the voltage is within the specified range (3.3V-5V).
- Connect QSPI Interface:
- Connect SCL (Pin 3) to your board's SPI Clock (SCK) pin.
- Connect SDA (Pin 4) to your board's SPI Data In/Out (MOSI/MISO) pin, depending on your QSPI implementation.
- Connect I01, I02, I03 (Pins 5,6,7) to additional data lines for QSPI communication.
- Connect CS (Pin 9) to your board's Chip Select (CS) pin.
- Connect Control Pins:
- Connect RST (Pin 8) to a GPIO pin on your board for display reset.
- Connect BL (Pin 10) to a GPIO pin for backlight control. This can be connected to a PWM pin for brightness adjustment.
- Connect TE (Pin 11) to a GPIO pin if frame synchronization is required for your application.
- Secure Connections: Ensure all connections are firm and correct to prevent short circuits or damage.
Operating Instructions
Once the display module is physically connected, you will need to program your microcontroller to control it. The ST77916 driver IC supports the QSPI interface, which allows for high-speed data transfer.
- Initialization:
- Upon power-up, the display driver IC (ST77916) needs to be initialized. This typically involves sending a sequence of commands via the QSPI interface.
- Perform a hardware reset by toggling the RST pin (Pin 8) low and then high.
- Send initialization commands as specified in the ST77916 datasheet (not provided in this manual, refer to manufacturer resources). These commands configure display parameters such as pixel format, gamma correction, and display orientation.
- Displaying Graphics:
- To display images or graphics, send pixel data to the display RAM via the QSPI interface.
- The QSPI interface allows for faster data transfer compared to standard SPI, enabling smoother animations and faster screen updates.
- Libraries for common microcontrollers (e.g., Adafruit GFX, LVGL) often support various display drivers and can simplify the programming process.
- Backlight Control:
- The backlight (BL, Pin 10) can be controlled by a digital output pin. For brightness adjustment, connect it to a PWM-capable pin on your microcontroller.
- Frame Synchronization (TE):
- The TE (Frame Synchronization) pin (Pin 11) can be used to synchronize your microcontroller's drawing operations with the display's refresh rate, preventing screen tearing. Consult the ST77916 datasheet for detailed usage.
Maintenance
Proper care and maintenance will extend the lifespan of your display module:
- Handling: Always handle the module by its edges to avoid touching the display surface or the delicate flex cable. Static electricity can damage electronic components, so use anti-static precautions (e.g., ESD wrist strap) when handling.
- Cleaning: If the display surface becomes dirty, gently wipe it with a soft, lint-free cloth. For stubborn smudges, use a small amount of isopropyl alcohol applied to the cloth, not directly to the screen. Avoid abrasive cleaners or harsh chemicals.
- Storage: Store the module in a dry, cool environment, away from direct sunlight and extreme temperatures. Keep it in its original anti-static packaging when not in use.
- Environmental Conditions: Avoid exposing the module to excessive moisture, dust, or corrosive substances. Operate within the specified working temperature range of -20°C to 70°C.
Troubleshooting
If you encounter issues with your display module, consider the following troubleshooting steps:
- No Display/Blank Screen:
- Check all power connections (VCC, GND) to ensure they are correctly wired and receiving the appropriate voltage (3.3V-5V).
- Verify that the backlight (BL) pin is correctly connected and receiving power or a control signal.
- Ensure the RST pin is properly toggled during initialization.
- Double-check all QSPI data and clock connections (SCL, SDA, I01, I02, I03, CS) for continuity and correct pin assignment.
- Confirm that your initialization code for the ST77916 driver IC is correct and complete.
- Incorrect Colors/Garbled Display:
- Review your QSPI data transmission code. Incorrect data format or timing can lead to display errors.
- Ensure the pixel format settings in your initialization code match the display's capabilities.
- Check for loose or faulty connections on the QSPI lines.
- Flickering Display:
- Ensure your power supply is stable and can provide sufficient current.
- Check if the frame synchronization (TE) pin is being used correctly, if applicable.
- Verify that your data transfer rate is appropriate for the QSPI interface and driver IC.
- Module Not Responding:
- Confirm that the module is receiving power.
- Check the RST and CS pins for correct logic levels and timing.
- If using a library, ensure it is compatible with the ST77916 driver and QSPI interface.
User Tips
Here are some general tips for working with this display module:
- Consult Datasheets: For advanced programming and detailed register configurations, always refer to the official datasheet for the ST77916 driver IC.
- Community Support: For DIY projects, online forums and communities (e.g., Arduino forums, Hackaday) can be valuable resources for example code, libraries, and troubleshooting advice related to similar display modules.
- Start Simple: Begin with basic display functions like filling the screen with a solid color or displaying simple text before moving on to complex graphics or animations.
- Power Considerations: While the module supports 3.3V-5V, ensure your logic levels match your microcontroller to avoid damage. Use level shifters if necessary.
Warranty and Support
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For technical support, warranty claims, or further assistance, please contact the seller or manufacturer directly through the platform where the product was purchased. Please retain your proof of purchase for warranty purposes.
