1. Introduction
This manual provides detailed instructions for the Surenoo SLC2004G FSTN Positive Character LCD Module. This display features a 20-character by 4-line format with an RGB LED backlight, offering versatile display options for various embedded applications. Please read this manual thoroughly before installation and operation to ensure proper functionality and longevity of the module.
2. Specifications
The following table outlines the key specifications for the Surenoo SLC2004G Character LCD Module:
| Attribute | Value |
|---|---|
| Model No. | SLC2004G |
| Product Type | Character LCD Module |
| Brand | Surenoo |
| Display Format | 20 Characters x 4 Lines |
| Display Mode | FSTN Positive |
| Interface | 6800 4-/8-bit Parallel |
| Controller | AIP31066, HD44780 or Equal |
| Font | English & Japanese |
| Outline Dimension | 146.00(W) x 62.50(H) x 13.00(T)mm |
| Visual Area | 123.50 x 43.00mm |
| Active Area | 118.83 x 38.47mm |
| Viewing Direction | 6:00 O'Clock |
| IC Package | COB |
| Power Supply (Type) | 5.0V |
3. Outline Drawing
Refer to the diagram below for the physical dimensions and layout of the SLC2004G module.
4. Pin Configuration
The following table details the function of each pin on the SLC2004G LCD module, essential for proper wiring and control.
| Pin No. | Symbol | Level | Description |
|---|---|---|---|
| 1 | Vss | 0V | Ground |
| 2 | Vdd | 5.0V | Supply Voltage for logic |
| 3 | VO | Variable | Operating 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 | Chip enable signal |
| 7 | DB0 | H/L | Data bit 0 |
| 8 | DB1 | H/L | Data bit 1 |
| 9 | DB2 | H/L | Data bit 2 |
| 10 | DB3 | H/L | Data bit 3 |
| 11 | DB4 | H/L | Data bit 4 |
| 12 | DB5 | H/L | Data bit 5 |
| 13 | DB6 | H/L | Data bit 6 |
| 14 | DB7 | H/L | Data bit 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) |
5. Setup Instructions
Follow these steps to properly set up your Surenoo SLC2004G LCD module:
- Power Connection: Connect Pin 1 (Vss) to Ground (0V) and Pin 2 (Vdd) to a +5.0V power supply.
- Contrast Adjustment: Connect Pin 3 (VO) to a variable resistor (potentiometer) between Vdd and Vss. Adjust the potentiometer to achieve optimal display contrast.
- Data and Control Lines: Connect the data lines (DB0-DB7) and control lines (RS, R/W, E) to your microcontroller's I/O pins. Ensure correct mapping as per your chosen parallel interface mode (4-bit or 8-bit).
- Backlight Connection:
- Connect Pin 15 (A) to the positive supply for the backlight (typically +5V, possibly through a current-limiting resistor if not integrated).
- Connect Pin 16 (R), Pin 17 (G), and Pin 18 (B) to your microcontroller's PWM-capable pins (or digital I/O pins for simple on/off control) to control the Red, Green, and Blue components of the backlight. Remember to use appropriate current-limiting resistors for each color channel if not integrated into the module.
- Initialization: After power-up, the LCD module requires an initialization sequence sent via the data and control lines. Refer to the AIP31066/HD44780 datasheet for the specific initialization commands and timing.
6. Operating Instructions
Once the module is set up and initialized, you can begin displaying characters and controlling the backlight:
6.1 Displaying Characters
- To send a command (e.g., clear display, set cursor position), set the RS pin to LOW and R/W pin to LOW, then place the command byte on the DB0-DB7 pins and pulse the E pin from HIGH to LOW.
- To send data (characters to display), set the RS pin to HIGH and R/W pin to LOW, then place the data byte on the DB0-DB7 pins and pulse the E pin from HIGH to LOW.
- The 20x4 display allows for 20 characters per line across 4 lines. The character set includes English and Japanese fonts.
6.2 Controlling RGB Backlight
The RGB backlight offers a wide range of colors. Control is achieved by adjusting the voltage or pulse-width modulation (PWM) applied to the R, G, and B pins (Pins 16, 17, 18). Pin 15 (A) should be connected to the positive supply.
- Basic Colors: Apply +5V to one of the R, G, or B pins (with appropriate current limiting) to light up that specific color. For example, +5V to R for red, +5V to G for green, +5V to B for blue.
- Mixed Colors: Combine two or more colors. For instance, Red + Green = Yellow.
- Brightness and Custom Colors: Use PWM on the R, G, and B pins to control the intensity of each color component, allowing for a full spectrum of custom colors and brightness levels.
7. 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, use a cloth lightly dampened with isopropyl alcohol. Avoid harsh chemicals, abrasive cleaners, or excessive pressure.
- Handling: Always handle the module by its edges. Avoid touching the display area or the exposed PCB components to prevent damage from static electricity or physical pressure.
- Storage: Store the module in a dry, dust-free environment, away from direct sunlight and extreme temperatures. Use anti-static bags if storing for extended periods.
- Power Supply: Ensure a stable and correct voltage supply (5.0V) to prevent damage to the module.
8. Troubleshooting
If you encounter issues with your LCD module, consider the following common problems and solutions:
- No Display/Blank Screen:
- Check power connections (Vss, Vdd) for correct voltage and polarity.
- Adjust the contrast potentiometer (VO pin). A completely blank or fully black screen can often be resolved by adjusting contrast.
- Verify the initialization sequence in your code. Incorrect or missing initialization commands will prevent the display from working.
- Garbled Characters:
- Check data line (DB0-DB7) connections for loose wires or incorrect mapping.
- Ensure correct timing for data and command writes (E pin pulse width and setup/hold times).
- Confirm the correct interface mode (4-bit or 8-bit) is selected in your software and hardware.
- Backlight Not Working:
- Check the power connection to Pin 15 (A) and the individual R, G, B pins (16, 17, 18).
- Ensure current-limiting resistors are correctly sized and connected for the backlight LEDs.
- Verify that the control signals for R, G, B pins are correctly configured and active.
- Display Too Dim/Bright:
- Adjust the contrast potentiometer (VO pin).
- For backlight brightness, adjust the PWM duty cycle on the R, G, B pins.
9. User Tips
- Always double-check your wiring against the pin configuration table before applying power. Incorrect wiring is a common cause of issues.
- When programming, use established LCD libraries for HD44780-compatible controllers to simplify development and ensure correct timing.
- Experiment with different contrast settings using the VO pin potentiometer to find the best readability for your viewing angle and ambient light conditions.
- For precise color control of the RGB backlight, utilize Pulse Width Modulation (PWM) from your microcontroller.
10. Warranty and Support
Surenoo Display is committed to providing high-quality display solutions. For any technical support, warranty inquiries, or further assistance with your SLC2004G LCD module, please contact Surenoo Official Store directly through their official channels. Please retain your purchase receipt for warranty claims.
For additional resources and product information, you may visit the Surenoo Display website: www.surenoo.com
