LSC028I07-M-V1: 2.8-Inch TFT LCD Module, 240×320 Resolution, 8080 MCU Interface, Transflective Display
Product Subtitle / Keywords
2.8 Inch Display, 240(RGB)×320 Resolution, a-Si TFT-LCD Module, Transflective, IPS, Normally Black, 262K Display Colors, 8080 MCU 8/16-bit Parallel Interface, Operating Temperature -20°C to +70°C, Storage Temperature -30°C to +80°C, Driver IC ST7789T3, Life Time 13 Months, RoHS Compliant, Product Spec Rev A0, Lesson Smart Display Technology Co., Ltd.
1. Executive Summary & Product Positioning
The LSC028I07-M-V1, developed by Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a transflective type color active matrix TFT (Thin Film Transistor) liquid crystal display (LCD) that uses amorphous silicon TFT as a switching device. This module is composed of a TFT LCD module, a driver circuit, and a back-light unit. The resolution of a 2.8" contains 240(RGB)x320 dots and can display up to 262K colors.
This product specification (Revision A0, dated 2023-10-30) serves as the definitive technical document, defining the module's general description, module parameters (including display size, LCD type, display mode, resolution, view direction, module outline, active area, display colors, interface, driver IC, operating/storage temperature, and life time), mechanical drawings (including detailed mechanical dimensions, tolerances, and notes on operating/storage temperature, backlight type, LED driving conditions, and RoHS compliance), module interface (pin-out with detailed functions for 38 pins), application circuit (motherboard LCM interface recommended circuit, backlight recommended circuit), absolute maximum ratings (for analog/logic supply voltage), electrical specification (DC characteristics for supply voltages, logic levels, and current consumption), AC characteristics (refer to IC datasheet), command table (refer to IC datasheet), recommended setting/initialization flow (refer to attached file), optical specifications (including chromaticity, viewing angle, contrast ratio, response time, and NTSC for both transmissive and reflective modes), quality assurance (including inspection specification based on GB/T2828.1-2012/ISO 2859-1:1999 and ANSI/ASQC Z1.4-1993, with AQL 0.4 for major defects and AQL 1.0 for minor defects, and detailed inspection criteria for glass crack, chipping, burr, FPC defect, screen deformation, polarizer bubble/dent, bezel, touch panel, PCB, soldering, and electrical defects), reliability specification (including test conditions and inspection standards), precautions and warranty (including safety, handling, and warranty liability), packaging, and prior consult matter.
The document provides the core parameters necessary for system integration into standard 2.8-inch portrait display applications. The unequivocal recommendation for engineers is to strictly adhere to the mechanical and electrical specifications described herein to ensure reliable performance and compatibility.
2. Detailed Product Overview & Architecture
- Core Technology: Transflective type color active matrix TFT (Thin Film Transistor) liquid crystal display (LCD) that uses amorphous silicon TFT as a switching device. This module is composed of a TFT LCD module, a driver circuit, and a back-light unit.
- Display Resolution: Portrait format: 240(RGB) × 320 pixel array.
- Display Mode: IPS (In-Plane Switching) / Transflective / Normally Black. This combination offers wide viewing angles (All directions) and good readability in both bright (reflective) and dark (transmissive) environments.
- Module Construction: TFT LCD Module, a driver circuit, and a back-light unit. The module type is not explicitly listed as COG+FPC+B/L in the general description, but the mechanical drawing shows FPC connection.
- Interface Type: The module uses an 8080 MCU 8/16-bit parallel interface. The interface mode is selectable via the IM0 pin (0: 80-8bit parallel I/F, 1: 80-16bit parallel I/F).
- Power Architecture: Requires two main power supplies: VCI (2.5V to 3.3V for Analog & Digital/Booster) and IOVCC (1.65V to 3.3V for I/O System).
- Backlight: 6 White LEDs in parallel, with typical forward voltage (Vf) of 3.0V~3.2V and forward current (If) of 20mA per LED (total 80mA).
- Touch Panel: The module includes a capacitive touch panel (CTP) interface as indicated by the pin description (TP_GND, TP_VCC, TP_SCL, TP_SDA, TP_INT). The specific touch controller is not mentioned.
- Driver IC: ST7789T3.
- Supplier: 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd).
- Life Time: 13 Months.
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Item | Specification | Unit |
|---|---|---|
| Model | LSC028I07-M-V1 | - |
| Display Size (Diagonal) | 2.8 | inch |
| Resolution | 240(RGB) × 320 | pixels |
| Module Outline (H×V×T) | 47.6 × 64.26 × 2.06 | mm |
| Active Area (H×V) | 43.2 × 57.6 | mm |
| Display Colors | 262K | colors |
| LCD Type | α-Si TFT | - |
| Display Mode | IPS / Transflective / Normally Black | - |
| View Direction | All (Best image) | - |
| Interface | 8080 MCU 8/16 bit | - |
| Driver IC | ST7789T3 | - |
| Life Time | 13 | Months |
| Weight | TBD | g |
3.2 Interface & Electrical Specifications
3.2.1 Absolute Maximum Ratings (From Section 6)
VSS=0V, Ta=25°C
| Item | Symbol | Min. | Max. | Unit |
|---|---|---|---|---|
| Analog Supply Voltage (Display IC) | VCI | -0.3 | +4.6 | V |
| Logic Supply Voltage (Display IC) | IOVCC | -0.3 | +4.6 | V |
| Logic Output Voltage (Display IC) | Vout | -0.3 | IOVCDD+0.5 | V |
3.2.2 Recommended DC Electrical Characteristics (From Section 7)
| Item | Symbol | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Analog Supply Voltage (Display IC) | VCI | 2.5 | 2.8 | 3.3 | V |
| Analog Supply Voltage (Touch IC) | TP VCC | 2.5 | 2.8 | 3.3 | V |
| Logic Supply Voltage (Display IC) | IOVDD | 1.65 | 2.8 | 3.3 | V |
| Logic Low Input Voltage | VIL | VSS | - | 0.3IOVCC | V |
| Logic High Input Voltage | VIH | 0.7IOVCC | - | IOVCC | V |
3.2.3 Pin Description (From Section 4)
The module uses an 38-pin FPC connector. Key signals include:
| NO. | SYMBOL | FUNCTION |
|---|---|---|
| 1 | LCM_ID | Hardware ID pin. |
| 2 | GND | Ground. |
| 3 | IOVCC | Power Supply for I/O System. |
| 4 | VCC | Power Supply for Analog, Digital System and Booster Circuit. |
| 5 | FMARK | Tearing effect signal. If not used, please let this pin open. |
| 6-9 | CS, RS, WR, RD | 8080 MCU parallel interface control signals. |
| 10-25 | DB0~DB15 | 8080 MCU parallel interface data bus. |
| 26 | RESET | Reset signal, active low. |
| 28-29 | LEDA | LED Anode. |
| 30-31 | LEDK | LED Cathode. |
| 33 | TP_VCC | Power Supply for TP. |
| 34 | IM0 | MCU interface mode select. 0: 80-8bit parallel, 1: 80-16bit parallel. |
| 36 | TP_SCL | I²C clock signal of Touch Panel. |
| 37 | TP_SDA | I²C data signal of Touch Panel. |
| 38 | TP_INT | Interrupt signal to main processor of Touch Panel. |
3.3 Optical Specifications (From Section 11)
3.3.1 Transmissive Mode (Ta=25°C, VDD=2.8V)
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Chromaticity (White) | XW | - | 0.2666 | 0.2962 | 0.3260 | - |
| Chromaticity (White) | YW | - | 0.2724 | 0.3012 | 0.3312 | - |
| Viewing Angle (Horizontal) | θx+ | Center CR≥2 | - | 25 | - | Deg. |
| Viewing Angle (Horizontal) | θx- | Center CR≥2 | - | 30 | - | Deg. |
| Viewing Angle (Vertical) | θy+ | Center CR≥2 | - | 30 | - | Deg. |
| Viewing Angle (Vertical) | θy- | Center CR≥2 | - | 30 | - | Deg. |
| NTSC | - | - | - | 20 | - | % |
3.3.2 Reflective Mode (Ta=25°C, VDD=2.8V)
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Contrast Ratio | CR | - | 5 | 7 | - | - |
| Viewing Angle (Horizontal) | θx+ | Center CR≥2 | 50 | - | - | Deg. |
| Viewing Angle (Vertical) | θy+ | Center CR≥2 | 50 | - | - | Deg. |
| NTSC | - | - | - | 16 | - | % |
4. Application Guidelines & Critical Notes
Intended Use
- Standard 2.8-inch portrait display applications (e.g., handheld devices, medical equipment, industrial controls).
- Systems requiring a 240×320 resolution display with an 8080 MCU parallel interface.
- Applications needing a transflective display for good readability in both indoor and outdoor (bright sunlight) environments.
- Systems requiring an IPS display for wide viewing angles.
- Applications requiring a built-in capacitive touch panel (CTP) with an I²C interface.
Critical Design Considerations
- Dual Power Supply (VCI=2.8V for Analog/Digital, IOVCC=2.8V for I/O): The module requires stable power supplies. The typical voltage for both VCI and IOVCC is 2.8V. Ensure the host processor's I/O voltage is compatible with the chosen IOVCC level (1.65V to 3.3V).
- 8080 MCU Parallel Interface (8 or 16-bit): The module uses an 8080 MCU parallel interface. The interface width is selectable via the IM0 pin. The host must be configured to operate in 8080 MCU mode with the correct data bus width.
- Transflective Display Technology: This module combines both transmissive (backlight-based) and reflective (ambient light-based) modes, providing excellent outdoor readability and flexibility for power-saving applications.
- IPS Display with Wide Viewing Angle: The module uses IPS technology, providing superior viewing angles compared to TN displays.
- External Constant-Current Backlight Driver: The backlight requires a constant current source. The document recommends a constant current circuit for every LED, with the current for each LED between 3mA and 20mA (Typ. 20mA). The total backlight voltage is the sum of the forward voltages of the 6 series-parallel LEDs.
- I²C Capacitive Touch Panel Interface: The CTP uses an I²C interface (TP_SCL, TP_SDA) with an interrupt pin (TP_INT) and is powered by TP_VCC (2.5V to 3.3V). The host must initialize the touch controller and communicate over I²C to read touch data.
- Temperature Range (-20°C to +70°C Operating): A standard industrial temperature range.
- Mechanical Integration (Module Outline 47.6mm × 64.26mm × 2.06mm): The module is very thin (2.06mm). The mechanical drawing specifies precise locations for the active area and FPC. Note that the module outline dimension excludes hooks, posts, and FPC/FPC tail.
- Life Time (13 Months): The specified lifetime is 13 months. This should be considered for product planning.
- ESD and Handling: Standard ESD precautions must be observed during handling and assembly due to the sensitive electronic and glass components.
Handling & Compliance
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass – handle with care. Avoid mechanical stress on the active area or FPC.
- Do not attempt to disassemble or modify the LCD module.
- The module is RoHS compliant.
5. Conclusion & Design-In Support
The LSC028I07-M-V1 specification details a compact 2.8-inch (240×320) IPS TFT LCD module with a transflective display, an 8080 MCU parallel interface, and an integrated capacitive touch panel — a versatile choice for applications requiring excellent outdoor readability and a classic parallel MCU interface.
Key Strengths
- Transflective Display: Excellent readability in both indoor and bright outdoor environments.
- IPS Technology: Wide viewing angles from all directions.
- Classic 8080 MCU Parallel Interface: Simple and widely compatible, ideal for many microcontrollers.
- Integrated Capacitive Touch Panel (I²C): Provides a complete touch display solution.
- Ultra-Thin Design (2.06mm): Suitable for space-constrained designs.
Main Design Focus
- The critical design tasks are properly configuring the host processor's 8080 MCU parallel interface to match the module's timing (refer to the ST7789T3 IC datasheet) and data bus width (8 or 16-bit via IM0 pin), providing dual power supplies (VCI=2.8V, IOVCC=2.8V) with proper decoupling, and implementing a constant-current LED backlight driver (3mA to 20mA per LED).
- Supporting requirements: Connect all ground pins. Ensure the RESET pin is driven low for a proper initialization sequence. Allow sufficient time for the module to stabilize after power-up.
This module is a robust and practical choice for engineers designing embedded systems that require a reliable, outdoor-readable display with a classic MCU interface and touch functionality.
