1. 제품 오버view
This manual provides detailed instructions for the GODIYMODULES 2.25 Inch TFT LCD Display Module. This module features a 2.25-inch color screen with a resolution of 76x284 pixels, driven by the ST7789 controller, and communicates via a Serial Peripheral Interface (SPI).
It is designed for integration into various electronic projects requiring a compact, high-resolution display.
그림 1: 전면 view of the 2.25 Inch TFT LCD Display Module with included pin headers.
2. 사양
Key technical specifications for the 2.25 Inch TFT LCD Display Module are listed below:
Figure 2: Detailed pinout and specifications table.
| 특징 | 설명 |
|---|---|
| LCD 크기 | 2.25인치 |
| 해결 | 76(H) x 284(V) 픽셀 |
| 디스플레이 모드 | 일반적으로 흰색 |
| 드라이버 IC | ST7789 |
| 인터페이스 | 4-Line SPI |
| 권tag및 범위 | 3~3.5V |
| 픽셀 피치 | 0.1947 (H) x 0.1947 (V) mm |
| 활동 영역 | 14.7972 (H) x 55.2948 (V) mm |
| 모듈 크기 | 30.0(H) x 63.0(V) x 3.76(D)mm |
| 픽셀 배열 | RGB 세로줄 |
| 휘도 | 600 (TYP) Cd/m2 |
| View잉 방향 | 12 O'clock (Best image) |
| 백라이트 | 흰색 LED 병렬 4개 |
| 작동 온도 | -20°C ~ +70°C |
| 보관 온도 | -30°C ~ +80°C |
3. 설정 및 연결
The display module uses an SPI interface for communication. Ensure your microcontroller or development board supports SPI and provides the necessary voltage 레벨.
3.1 핀 설명
Refer to the pinout diagram for correct connections. The module operates within a voltage 범위는 3~3.5V입니다.
Figure 3: Pinout diagram with descriptions.
- GND : Power ground pin.
- VCC: Power supply positive, voltage 범위: 3 - 3.5V.
- SCL: SPI clock pin.
- SDA: SPI data pin.
- 자원: Display reset pin, active low.
- 직류: Data or display command selection pin.
- CS: Chip select for driver chip, active low.
- 검정색: Backlight control switch, default on, active low to turn off backlight.
3.2 연결 절차
- Connect the GND pin of the module to the ground of your microcontroller.
- Connect the VCC pin to a stable 3V-3.5V power supply.
- Connect SCL, SDA, RES, DC, CS, and BLK pins to the corresponding SPI and control pins on your microcontroller. Refer to your microcontroller's documentation for specific SPI pin assignments.
- 간헐적인 작동을 방지하기 위해 모든 연결이 안전한지 확인하십시오.
4. 사용 설명서
Once the module is correctly wired, software configuration is required to initialize and control the display.
4.1 소프트웨어 초기화
- Utilize a library compatible with the ST7789 driver for your chosen programming environment (e.g., Arduino, MicroPython, LVGL).
- Initialize the SPI communication protocol, specifying the correct clock speed and data mode.
- Send initialization commands to the ST7789 driver as per its datasheet or library documentation. This typically involves setting display orientation, pixel format, and enabling the display.
4.2 콘텐츠 표시
- Use the display library functions to draw graphics, text, and images.
- The display supports 262K colors. Ensure your image data is formatted correctly for the ST7789 controller.
- For optimal color representation, it may be necessary to invert color data bits in your software configuration if colors appear incorrect or "funky".
5. 유지관리
Proper care ensures the longevity and performance of your display module.
- 청소: Gently wipe the display surface with a soft, lint-free cloth. Avoid abrasive materials or harsh chemical cleaners.
- 손질: Avoid applying excessive pressure to the display surface. Handle the module by its edges to prevent damage to the screen or components.
- 저장: Store the module in a dry, dust-free environment within the specified storage temperature range (-30°C to +80°C).
- 힘: Always ensure the power supply is within the specified 3V-3.5V range. Over-voltag모듈이 손상될 수 있습니다.
6. 문제 해결
디스플레이 모듈에 문제가 발생하면 다음 문제 해결 단계를 고려하십시오.
- 디스플레이 없음/빈 화면:
- Verify all power connections (VCC, GND) are correct and within the 3V-3.5V range.
- Check SPI connections (SCL, SDA, CS, DC, RES) for continuity and correct pin assignment.
- Ensure the BLK pin is not active low (turned off). If connected, try setting it high or leaving it unconnected if default-on is desired.
- Confirm that the ST7789 driver is correctly initialized in your software.
- Incorrect or "Funky" Colors:
- As noted by users, you may need to invert color data bits in your display library or driver configuration. This is a common requirement for some ST7789 implementations.
- Ensure your image or color data is in the correct format (e.g., RGB565, RGB888) expected by the driver.
- 깜박이는 디스플레이:
- Check the SPI clock speed. A speed that is too high or too low for your microcontroller or wiring can cause issues.
- 전원 공급이 안정적이고 노이즈가 없는지 확인하십시오.
- 설치 난이도:
- Refer to online resources and community forums for ST7789 and SPI display examples with your specific microcontroller.
- Double-check all wiring against the pinout diagram.
7. 보증 정보
The GODIYMODULES 2.25 Inch TFT LCD Display Module is covered by the manufacturer's standard warranty. For specific details regarding warranty duration, terms, and conditions, please refer to the documentation provided at the time of purchase or contact GODIYMODULES directly.
Typically, warranty covers defects in materials and workmanship under normal use. Damage resulting from improper installation, misuse, or unauthorized modifications is generally not covered.
8. 지원
For technical assistance, additional documentation, or inquiries not covered in this manual, please contact the seller or GODIYMODULES customer support. When contacting support, please provide your product model number and a detailed description of the issue.
You may also find helpful resources and community support online for projects involving ST7789-based SPI displays.