1. Pengenalan
The Surenoo SLC2004E is a 20x4 character LCD module featuring an RGB LED backlight, offering versatile display capabilities for various embedded applications. This module supports both English and Cyrillic (Russian) character sets and utilizes a 6800 4-bit or 8-bit parallel interface for communication. Its customizable RGB backlight allows for a wide range of color options, enhancing visual appeal and user experience.
2. Spesifikasi
| Ciri | Penerangan |
|---|---|
| Nombor Model | SLC2004E (18 Pins RGB Display) |
| Jenis Produk | Modul LCD watak |
| Jenama | Surenoo |
| Format Paparan | 20 Aksara x 4 Baris |
| Antara muka | 6800 4-bit Selari, 6800 8-bit Selari |
| IC Pengawal | AIP31066, HD44780, KS0066, SPLC780D (or equivalent) |
| Font Support | English & Russian (Cyrillic) |
| Dimensi Garis Besar | 98.00(W) x 60.00(H) x 14.00(T) mm |
| Kawasan Visual | 77.00 x 25.20 mm |
| Kawasan Aktif | 70.36 x 20.44 mm |
| Viewdalam Arah | 6:00 O'Clock |
| Pakej IC | COB (Chip-on-Board) |
| Bekalan Kuasa | 5.0V |
| Mod Paparan | NC (Normally White) |
| Penyesuaian | ya |
| asal usul | Tanah Besar China |
3. Persediaan dan Sambungan
This section details the pin configuration and general connection guidelines for the SLC2004E LCD module. Proper wiring is crucial for correct operation.
Konfigurasi 3.1 Pin
The SLC2004E module features 18 pins. Refer to the table and diagram below for pin assignments and descriptions:
| Pin no. | Simbol | Tahap | Penerangan |
|---|---|---|---|
| 1 | VSS | 0V | tanah |
| 2 | VDD | 5.0V | Bekalan Voltage untuk logik |
| 3 | VO | (Pembolehubah) | Operasi voltage for LCD (Contrast Adjustment) |
| 4 | RS | H/L | H: Data, L: Instruction code |
| 5 | R/W | H/L | H: Read (MPU→Module) L: Write (MPU→Module) |
| 6 | E | H.H→L | Isyarat daya cip |
| 7 | DB0 | H/L | Bit data 0 |
| 8 | DB1 | H/L | Bit data 1 |
| 9 | DB2 | H/L | Bit data 2 |
| 10 | DB3 | H/L | Bit data 3 |
| 11 | DB4 | H/L | Bit data 4 |
| 12 | DB5 | H/L | Bit data 5 |
| 13 | DB6 | H/L | Bit data 6 |
| 14 | DB7 | H/L | Bit data 7 |
| 15 | A | — | Power supply for LED backlight (+) |
| 16 | R | — | Power Supply for LED backlight (Red) |
| 17 | G | — | Power Supply for LED backlight (Green) |
| 18 | B | — | Power Supply for LED backlight (Blue) |
3.2 Garis Panduan Sambungan Umum
- Bekalan Kuasa: Connect VDD (Pin 2) to +5.0V and VSS (Pin 1) to Ground.
- Pelarasan Kontras: Connect a potentiometer between VDD, VSS, dan VO (Pin 3) to adjust the display contrast. The wiper of the potentiometer should connect to VO.
- Data Lines: Connect DB0-DB7 (Pins 7-14) to your microcontroller's data pins. The module supports both 4-bit and 8-bit parallel modes. In 4-bit mode, typically only DB4-DB7 are used.
- Control Lines: Connect RS (Register Select, Pin 4), R/W (Read/Write, Pin 5), and E (Enable, Pin 6) to appropriate digital output pins on your microcontroller.
- Lampu Belakang RGB: Connect Pin 15 (A) to +5.0V (or appropriate backlight voltage with a current-limiting resistor). Pins 16 (R), 17 (G), and 18 (B) control the individual Red, Green, and Blue components of the backlight. These pins should be connected to PWM-capable pins on your microcontroller, typically through current-limiting resistors, to control color and brightness.
4. Arahan Operasi
The SLC2004E module is controlled via its parallel interface using commands and data sent from a microcontroller. The internal controller (compatible with HD44780) handles character display and module functions.
4.1 Initializing the LCD
After power-up, the LCD requires a specific initialization sequence. This typically involves sending a series of function set, display on/off, clear display, and entry mode set commands. Refer to the datasheet of the compatible controller IC (e.g., HD44780) for the exact sequence and timing requirements.
4.2 Displaying Characters
To display characters, set the RS pin high (data mode) and send the ASCII or character code for the desired character to the data pins (DB0-DB7). The module supports both English and Russian (Cyrillic) character sets. The cursor automatically advances after each character is written.
4.3 Controlling RGB Backlight
The RGB backlight can be controlled by applying appropriate voltage levels to pins 16 (Red), 17 (Green), and 18 (Blue). By using Pulse Width Modulation (PWM) on these pins, you can mix colors and adjust brightness. For example:
- Red: Drive Pin 16 (R) high.
- Green: Drive Pin 17 (G) high.
- Blue: Drive Pin 18 (B) high.
- Yellow: Drive Pin 16 (R) and Pin 17 (G) high.
- White: Drive Pin 16 (R), Pin 17 (G), and Pin 18 (B) high.
Adjusting the PWM duty cycle on these pins allows for fine-grained control over color intensity and mixing.
5. Penyelenggaraan
To ensure the longevity and optimal performance of your Surenoo SLC2004E LCD module, follow these maintenance guidelines:
- Pengendalian: Always handle the module by its edges. Avoid touching the display area or the pins directly to prevent damage from static electricity or contaminants.
- Pembersihan: If the display surface becomes dirty, gently wipe it with a soft, lint-free cloth. For stubborn marks, lightly dampen the cloth with isopropyl alcohol. Do not use abrasive cleaners, solvents, or apply excessive pressure.
- Keadaan Persekitaran: Avoid exposing the module to extreme temperatures, high humidity, direct sunlight for prolonged periods, or corrosive environments. Operate within the specified temperature range.
- Kuasa: Pastikan bekalan kuasa voltage is stable and within the specified 5.0V range. Incorrect voltage boleh merosakkan modul.
- Storan: When not in use, store the module in its original anti-static packaging in a cool, dry place.
6. Penyelesaian masalah
If you encounter issues with your SLC2004E LCD module, consider the following troubleshooting steps:
- Tiada Paparan/Skrin Kosong:
- Check all power connections (VDD, VSS) to ensure they are correctly supplied with 5.0V and ground.
- Adjust the contrast potentiometer (connected to VO). A blank screen can sometimes indicate incorrect contrast settings.
- Verify that the backlight is receiving power (Pin 15 'A' to +5V).
- Garbled or Incorrect Characters:
- Double-check all data (DB0-DB7) and control (RS, R/W, E) line connections for continuity and correct wiring.
- Ensure your microcontroller's code is sending the correct initialization sequence and character data according to the HD44780-compatible controller datasheet.
- Confirm that the 4-bit or 8-bit interface mode is correctly configured in both hardware and software.
- Backlight Not Working or Incorrect Color:
- Check the power connection to the backlight anode (Pin 15 'A').
- Verify connections to the individual RGB cathode pins (16, 17, 18) and ensure they are being driven correctly by your microcontroller (e.g., PWM signals).
- Ensure current-limiting resistors are used for the RGB backlight pins to prevent damage.
- Operasi sekejap:
- Inspect for loose connections or cold solder joints.
- Check for power supply fluctuations or noise. Add decoupling capacitors if necessary.
7. Petua Pengguna
- Pelarasan Kontras: Always fine-tune the contrast (VO pin) after initial setup to achieve the best readability for your specific viewsudut dan keadaan pencahayaan.
- Code Libraries: For ease of use with microcontrollers like Arduino, consider using existing LCD libraries (e.g., LiquidCrystal library) which abstract much of the low-level control. Remember to configure the library for a 20x4 display and the correct interface mode.
- Backlight Resistors: When connecting the RGB backlight pins (R, G, B) to your microcontroller, always use appropriate current-limiting resistors to protect both the LCD and the microcontroller. The exact resistor values will depend on your supply voltage and desired current.
- Penggunaan Kuasa: Be mindful of the power consumption, especially when using the RGB backlight at full brightness, and ensure your power supply can provide sufficient current.
8. Waranti dan Sokongan
Surenoo Display products are manufactured to high-quality standards. For technical assistance, detailed datasheets, or any issues not covered in this manual, please contact Surenoo Official Store directly. Provide your product model (SLC2004E) and a detailed description of the issue for efficient support.
