1. ຜະລິດຕະພັນເກີນview
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.
ຮູບ 1: ດ້ານຫນ້າ view of the 2.25 Inch TFT LCD Display Module with included pin headers.
2. ຂໍ້ມູນຈໍາເພາະ
Key technical specifications for the 2.25 Inch TFT LCD Display Module are listed below:
Figure 2: Detailed pinout and specifications table.
| ຄຸນສົມບັດ | ລາຍລະອຽດ |
|---|---|
| ຂະໜາດ LCD | 2.25 ນິ້ວ |
| ຄວາມລະອຽດ | 76(H) x 284(V) ພິກເຊວ |
| ໂໝດສະແດງຜົນ | ທຳ ມະດາຂາວ |
| ຂັບ IC | ST7789 |
| ການໂຕ້ຕອບ | 4-Line SPI |
| ສະບັບtage ຂອບເຂດ | 3 - 3.5V |
| Pixel Pitch | 0.1947(H) x 0.1947(V) ມມ |
| ພື້ນທີ່ເຄື່ອນໄຫວ | 14.7972(H) x 55.2948(V) ມມ |
| ຂະໜາດໂມດູນ | 30.0(H) x 63.0(V) x 3.76(D) ມມ |
| ການຈັດວາງ Pixel | RGB ແຖບແນວຕັ້ງ |
| ຄວາມສະຫວ່າງ | 600 (TYP) Cd/m2 |
| Viewທິດທາງ | 12 O'clock (Best image) |
| ແສງຫຼັງ | 4 ສີຂາວ LED ຂະຫນານ |
| ອຸນຫະພູມປະຕິບັດການ | -20°C ~ +70°C |
| ອຸນຫະພູມການເກັບຮັກສາ | -30°C ~ +80°C |
3. ການຕິດຕັ້ງແລະການເຊື່ອມຕໍ່
The display module uses an SPI interface for communication. Ensure your microcontroller or development board supports SPI and provides the necessary voltage ລະດັບ.
3.1 Pin ຄໍາອະທິບາຍ
Refer to the pinout diagram for correct connections. The module operates within a voltage ຊ່ວງ 3V ຫາ 3.5V.
Figure 3: Pinout diagram with descriptions.
- GND: Power ground pin.
- VCC: Power supply positive, voltage ຊ່ວງ: 3 - 3.5V.
- SCL: SPI clock pin.
- SDA: SPI data pin.
- RES: Display reset pin, active low.
- DC: Data or display command selection pin.
- CS: Chip select for driver chip, active low.
- BLK: Backlight control switch, default on, active low to turn off backlight.
3.2 ຂັ້ນຕອນການເຊື່ອມຕໍ່
- 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.
- ຮັບປະກັນວ່າການເຊື່ອມຕໍ່ທັງໝົດແມ່ນປອດໄພເພື່ອປ້ອງກັນການເຮັດວຽກທີ່ບໍ່ຕໍ່ເນື່ອງ.
4. ຄໍາແນະນໍາການດໍາເນີນງານ
Once the module is correctly wired, software configuration is required to initialize and control the display.
4.1 ການເລີ່ມຕົ້ນຊອບແວ
- 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 ການສະແດງເນື້ອຫາ
- 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. ບໍາລຸງຮັກສາ
Proper care ensures the longevity and performance of your display module.
- ທໍາຄວາມສະອາດ: Gently wipe the display surface with a soft, lint-free cloth. Avoid abrasive materials or harsh chemical cleaners.
- ການຈັດການ: Avoid applying excessive pressure to the display surface. Handle the module by its edges to prevent damage to the screen or components.
- ການເກັບຮັກສາ: Store the module in a dry, dust-free environment within the specified storage temperature range (-30°C to +80°C).
- ພະລັງງານ: Always ensure the power supply is within the specified 3V-3.5V range. Over-voltage ສາມາດທໍາລາຍໂມດູນ.
6. ການແກ້ໄຂບັນຫາ
If you encounter issues with your display module, consider the following troubleshooting steps:
- ບໍ່ມີຈໍສະແດງຜົນ/ເປົ່າຫວ່າງ:
- 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.
- ຈໍສະແດງຜົນ Flickering:
- Check the SPI clock speed. A speed that is too high or too low for your microcontroller or wiring can cause issues.
- Ensure power supply is stable and free from noise.
- Difficulty in Setup:
- 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. ຂໍ້ມູນການຮັບປະກັນ
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. ສະຫນັບສະຫນູນ
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.