Product Main Title:
LS0128I10-S-V1: 1.28-Inch TFT LCD Module, 240x240 Resolution, 262K Colors, 4-Line Serial Interface, for Compact Embedded Applications
Product Subtitle / Keywords:
1.28 Inch Display, Square 240x240 Resolution, Transmissive a-Si TFT, 4-Line Serial Interface (SPI), COG+FPC+B/L, 262K Colors, -10°C to +60°C Operation, Detailed Serial Timing & Pinout
Comprehensive Technical Specification & Application Guide
1. Executive Summary & Product Positioning
The LS0128I10-S-V1, developed by LESSON (Wan'an) Zhixian Technology Co., Ltd., is a compact 1.28-inch square transmissive amorphous Silicon TFT-LCD module. This product specification book serves as the definitive technical document, meticulously defining its structural composition (COG+FPC+B/L), mechanical dimensions, absolute maximum ratings, detailed electrical characteristics, precise 4-line serial interface timing, and electro-optical performance. It delivers a square resolution of 240(RGB)×240 with 262K-color display capability. The results indicate the module has a complete structure and explicit parameters, making it suitable for embedded scenarios requiring precise display and interface control. The unequivocal recommendation for design and usage is to perform hardware matching and verification based on the voltage, temperature, timing, and optical limits provided in this document to ensure performance and reliability.
2. Detailed Product Overview & Architecture
- Core Technology: Transmissive-type a-Si TFT-LCD.
- Display Characteristics: Capable of displaying up to 262K colors.
- Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight Unit). Composed of a TFT-LCD panel, a driver circuit, and a backlight unit.
- Interface: 4-line serial interface (SPI-like), suitable for connection to microcontrollers.
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
- Panel Size (Diagonal): 1.28 inches
- Active Area (H×V): 32.4 mm × 32.4 mm
- Module Size (H×V×D): 35.6 mm × 37.74 mm × 2.1 mm
- Resolution: 240 (RGB) × 240 pixels
- Display Mode: Transmissive a-Si TFT-LCD
3.2 Electrical & Interface Specifications
3.2.1 Absolute Maximum Ratings
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 4.6 | V | Note1,2 |
| Supply voltage (I/O) | IOVCC | -0.3 | 4.6 | V | Note1,2 |
| Operating temperature | TOPR | -10 | 60 | °C | Note1,2 |
| Storage temperature | TSTR | -20 | 70 | °C | Note1,2 |
3.2.2 Electrical Characteristics (DC, Ta=25°C)
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Supply voltage | VCC | 2.65 | 2.8 | 3.3 | V | Note1 |
| I/O Supply voltage | IOVCC | 1.65 | 1.8 | 3.3 | V | Note1 |
| Input Voltage (L) | VIL | 0 | -- | 0.3*IOVCC | V | Note1 |
| Input Voltage (H) | VIH | 0.7*IOVCC | -- | IOVCC | V | Note1 |
3.2.3 Pin Description (15-pin FPC)
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDK | P | Power for LED backlight cathode |
| 2 | GND | P | Ground |
| 3 | TE | O | Tearing effect output pin to synchronize MPU to frame writing |
| 4 | SDA | I/O | Serial data input/output PIN |
| 5 | RS | I | Command and Data select pin |
| 6 | SCL | I | Serial clock pin |
| 7 | CS | I | Chip select pin |
| 8 | RESET | I | Reset pin. |
| 9 | IOVCC1.8V | P | I/O power supply (1.8V) |
| 10, 11 | VCC2.8V | P | Analog power supply (2.8V) |
| 12, 13 | GND | P | Ground |
| 14, 15 | LEDA | P | Power for LED backlight anode |
3.2.4 4-Line Serial Interface Timing Characteristics (VDDI=1.65-3.3V, VDD=2.65-3.3V, Ta=25°C)
Key parameters for Write and Read operations:
| Signal | Symbol | Parameter | MIN | MAX | Unit | Description |
|---|---|---|---|---|---|---|
| CSX | T_CSS | Chip select setup time (write) | 15 | -- | ns | |
| CSX | T_CSH | Chip select hold time (write) | 15 | -- | ns | |
| CSX | T_CSS | Chip select setup time (read) | 60 | -- | ns | |
| CSX | T_SCC | Chip select hold time (read) | 65 | -- | ns | |
| CSX | T_CHW | Chip select "H" pulse width | 40 | -- | ns | |
| SCL | T_SCYCW | Serial clock cycle (Write) | 16 | -- | ns | write command & data ram |
| SCL | T_SHW | SCL "H" pulse width (Write) | 7 | -- | ns | write command & data ram |
| SCL | T_SLW | SCL "L" pulse width (Write) | 7 | -- | ns | write command & data ram |
3.2.5 Backlight Unit
- Light Source: 2 x White LEDs.
- Drive Condition: Forward Current (If) = 40mA; Forward Voltage (Vf) = 3.0V ~ 3.1V.
4. Application Guidelines & Critical Notes
- Intended Use: Wearable devices, compact IoT displays, handheld instruments—any space-constrained application requiring a small, colorful square display with a simple serial interface.
- Critical Design Considerations:
- Dual Power Supplies: Provide clean and stable 2.8V (VCC) and 1.8V (IOVCC) supplies as per the electrical characteristics.
- Interface Timing: The host microcontroller must meet the detailed setup, hold, and cycle times provided for both write and read operations. Note the significantly longer timing requirements for read operations compared to writes.
- Backlight Driver: Use a constant-current driver circuit capable of providing 40mA for the two parallel LEDs.
- Tearing Effect (TE): The TE pin can be used to synchronize the MPU frame writing to the LCD's refresh, reducing tearing artifacts.
- Handling: Observe standard ESD precautions during handling and assembly.
5. Conclusion & Design-In Support
The LS0128I10-S-V1 specification provides all necessary parameters for integrating a reliable and compact 1.28-inch display. Its key strengths are the detailed 4-line serial interface timing and clear pinout, enabling straightforward connection to most microcontrollers. Success requires careful attention to the dual power supply requirements (2.8V & 1.8V) and strict adherence to the SPI timing parameters, noting the different requirements for read vs. write operations. By following the electrical, thermal, and mechanical limits, designers can leverage this module to add a crisp, colorful square display to their most compact embedded designs.
