1. Introduction
This manual provides comprehensive instructions for the Estardyn 1.28 inch TFT LCD Display Module. This module features a round RGB IPS HD display with a 240x240 resolution, driven by the GC9A01 chip, and utilizes a 4-wire SPI interface for communication. It is designed for various embedded applications requiring a compact, high-quality display.
2. Features
- IPS color display screen for vivid visuals.
- 4-Pin SPI communication interface.
- Adjustable display direction.
- Full viewing angle display.
3. Specifications
The following table details the technical specifications of the 1.28 inch TFT LCD Display Module.
| No. | Item | Contents | Unit |
|---|---|---|---|
| 1 | LCD Size | 1.28 | inch |
| 2 | Display Mode | Normally black | - |
| 3 | Resolution | 240(H)RGB x 240(V) | pixels |
| 4 | Dot pitch | 0.135(H) x 0.135(V) | mm |
| 5 | Active area | Ø32.4 | mm |
| 6 | Module size | 45.5(H) x 48 (V) x11.5 (D) | mm |
| 7 | Color arrangement | RGB Vvertical stripe | - |
| 8 | Interface | 4 Line SPI | - |
| 9 | Drive IC | GC9A01 | - |
| 10 | Luminance(cd/m2) | 400 (TYP) | Cd/m2 |
| 11 | Viewing Direction | All View | O'Clock |
| 12 | Back Light Type | 2 White LED Parallel | - |
| 13 | Operating Temp. | -20℃ ~ + 70℃ | ℃ |
| 14 | Storage Temp. | -30℃ ~ + 80℃ | ℃ |
| 15 | Weight | TBD | g |
3.1. Physical Dimensions
4. Setup
4.1. Pinout Description
The module communicates via a 4-wire SPI interface. The pins are clearly labeled on the board. Refer to the pinout table and diagram below for proper connection.
| NO. | Symbol | Description |
|---|---|---|
| 1 | VCC | Power |
| 2 | GND | Power Ground |
| 3 | SCL | This pin is used to be serial interface clock |
| 4 | SDA | SPI interface input/output pin. the data is latched on the rising edge of the SCL signal. |
| 5 | DC | Display data/command selection pin in 4-line serial interface. |
| 6 | CS | Chip selection pin: low enable, high disable. |
| 7 | RST | This signal will reset the device and it must be applied to properly initialize the chip. Signal is active low. |
| 8 | BLK | Backlight control pin (if available and used) |
4.2. Power Supply
The module requires a DC 3.3V power supply. Ensure your power source provides stable voltage within the specified range (2.8V-3.3V).
4.3. Connection Steps
- Connect the VCC pin of the display module to your microcontroller's 3.3V power output.
- Connect the GND pin of the display module to your microcontroller's ground.
- Connect the SCL pin (Serial Clock) to your microcontroller's SPI clock pin.
- Connect the SDA pin (Serial Data) to your microcontroller's SPI MOSI (Master Out Slave In) pin.
- Connect the DC pin (Data/Command) to a general-purpose output pin on your microcontroller.
- Connect the CS pin (Chip Select) to another general-purpose output pin on your microcontroller.
- Connect the RST pin (Reset) to a general-purpose output pin on your microcontroller.
- (Optional) If backlight control is desired, connect the BLK pin to a PWM-capable pin on your microcontroller or a constant 3.3V for full brightness.
5. Operating Instructions
The Estardyn 1.28 inch TFT LCD Display Module is controlled via a 4-wire SPI interface. To operate the display, you will need to write firmware for your microcontroller that communicates with the GC9A01 driver chip.
5.1. Software Libraries
It is highly recommended to use existing open-source libraries for the GC9A01 driver chip, compatible with your chosen microcontroller platform (e.g., Arduino, ESP32, Raspberry Pi). These libraries simplify the process of initialization, drawing graphics, and displaying text.
5.2. Initialization Sequence
The GC9A01 driver requires a specific initialization sequence to configure the display. This typically involves:
- Sending a software reset command (via RST pin or SPI command).
- Sending various configuration commands for display mode, color depth, gamma correction, etc.
- Turning on the display.
Refer to the documentation of your chosen software library or the GC9A01 datasheet for the exact sequence.
5.3. Displaying Content
Once initialized, content can be sent to the display buffer via SPI. Libraries usually provide functions for:
- Setting individual pixels.
- Drawing lines, circles, rectangles.
- Displaying text with various fonts.
- Displaying images.
The display supports adjustable direction and full viewing angles, allowing for flexible integration into your projects.
6. Maintenance
To ensure the longevity and optimal performance of your LCD module, follow these maintenance guidelines:
- Cleaning: Gently wipe the display surface with a soft, lint-free cloth. For stubborn smudges, slightly dampen the cloth with distilled water or a specialized screen cleaner. Avoid harsh chemicals, abrasive materials, or excessive pressure.
- Environmental Conditions: Operate and store the module within the specified temperature and humidity ranges:
- Operating Temperature: -20℃ to +70℃
- Storage Temperature: -30℃ to +80℃
- Working Humidity: 5% to 95% RH
- Handling: Avoid applying excessive pressure to the display surface or bending the PCB. Handle the module by its edges to prevent damage to components or the display panel.
- Power: Always ensure the power supply is within the recommended DC 3.3V range. Incorrect voltage can damage the module.
7. Troubleshooting
If you encounter issues with your Estardyn 1.28 inch TFT LCD Display Module, consider the following troubleshooting steps:
- No Display/Blank Screen:
- Verify power connections (VCC and GND) are correct and stable at 3.3V.
- Check all SPI connections (SCL, SDA, DC, CS, RST) for continuity and correct pin assignment.
- Ensure the RST pin is properly toggled during initialization (active low).
- Confirm the backlight (BLK) pin is connected and receiving power if not controlled by PWM.
- Review your initialization code for the GC9A01 driver. Incorrect commands can prevent the display from turning on.
- Incorrect Colors/Garbled Display:
- Check the SPI data line (SDA/MOSI) for proper connection.
- Verify the SPI clock speed is compatible with the module and your microcontroller.
- Ensure the correct color format (e.g., RGB565) is being used in your software.
- Confirm the display orientation settings in your code match your desired view.
- Partial Display/Missing Pixels:
- Inspect the FPC (Flexible Printed Circuit) connector for any damage or misalignment.
- Ensure the display area and resolution settings in your code match the module's 240x240 resolution.
- Module Not Responding:
- Double-check all wiring, especially power and ground.
- Test with a known-good microcontroller or development board.
- Consider if the module might have been damaged by incorrect voltage or static discharge.
8. User Tips
- Use Libraries: For ease of development, utilize well-established open-source libraries for the GC9A01 driver, such as those available for Arduino (e.g., Adafruit GFX Library with a GC9A01 driver extension) or MicroPython.
- Voltage Level Shifters: If your microcontroller operates at 5V, use appropriate logic level shifters for the SPI communication lines (SCL, SDA, DC, CS, RST) to protect the 3.3V display module.
- Backlight Control: The BLK pin can be connected directly to 3.3V for constant backlight, or to a PWM-capable pin on your microcontroller for adjustable brightness.
- Power Decoupling: For stable operation, especially with longer wires, consider adding a small capacitor (e.g., 0.1uF) across VCC and GND near the display module.
- Experiment with Orientation: The display supports adjustable direction. Experiment with different rotation settings in your code to find the best fit for your project's physical layout.
9. Warranty and Support
For technical support, warranty inquiries, or further assistance, please contact the seller or manufacturer directly. Provide your product model number and a detailed description of the issue to facilitate a quicker resolution.
10. Applications
This versatile display module is suitable for a wide range of applications, including:
- Instrument displays (e.g., gauges, meters).
- Mobile devices and compact gadgets.
- Wearable display devices (e.g., smartwatches, fitness trackers).
- Real-time monitoring and display equipment.
- DIY electronics projects requiring a small, circular display.
