Product Main Title:
LSC016I02-QS-V1: 1.6-Inch IPS TFT LCD Module with Capacitive Touch Panel (CTP), 400x400 Resolution, 16.7M Colors, QSPI Interface
Product Subtitle / Keywords:
1.6 Inch Square Display, 400x400 High Resolution, Transmissive a-Si IPS TFT, Integrated Capacitive Touch Panel (CTP), QSPI Interface, COG+FPC+B/L, 16.7M Colors, High Brightness, RoHS & Halogen-Free
Comprehensive Technical Specification & Application Guide
1. Executive Summary & Product Positioning
The LSC016I02-QS-V1, developed by LESSON (Wan'an) Zhixian Technology Co., Ltd., is a premium 1.6-inch square transmissive amorphous Silicon TFT-LCD module with an integrated Capacitive Touch Panel (CTP). This product specification book serves as the definitive technical document, meticulously defining its structural composition (COG+FPC+B/L+CTP), mechanical dimensions, absolute maximum ratings, detailed electrical characteristics, precise Quad SPI (QSPI) interface timing, touch panel interface, and electro-optical performance. It delivers a high resolution of 400(RGB)×400 with true 16.7M-color (RGB888) display capability. The document provides a complete technical basis for design-in, covering all critical aspects from the combined LCM+CTP structure to the high-speed serial interface. The unequivocal recommendation for engineers is to strictly adhere to the mechanical stack-up tolerances, dual power supply requirements, QSPI timing, and CTP interface protocol described herein to ensure reliable operation of both display and touch functions.
2. Detailed Product Overview & Architecture
- Core Technology: Transmissive-type a-Si TFT-LCD with IPS (In-Plane Switching) technology.
- Display Characteristics: Capable of displaying up to 16.7 million colors.
- Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight Unit) + CTP (Capacitive Touch Panel). A fully integrated display and touch solution.
- Display Interface: Quad SPI (QSPI) – a high-speed serial interface utilizing multiple data lines.
- Touch Panel Interface: Separate I²C interface (TP_SDA, TP_SCL) and control pins (TP_RST, TP_INT) for the capacitive touch controller.
- Driver IC: ST77903 for the LCD.
- Touch Controller: CST816 (inferred from notes on one drawing).
- Viewing Direction: Free (IPS – wide viewing angle).
- Display Mode: Normally Black.
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
- Panel Size (Diagonal): 1.6 inches
- Active Area (H×V): 39.84 mm × 39.84 mm (Perfect square)
- Module Size (H×V×D): 44.00 mm × 44.00 mm × 2.68 mm (Including CTP)
- Resolution: 400 (RGB) × 400 pixels
- Number of Dots: 400(RGB) × 400
- General Tolerance: ±0.20 mm
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 |
| I/O Supply voltage | IOVCC | -0.3 | 4.6 | V | Note1, 2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1, 2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1, 2 |
3.2.2 Electrical Characteristics (DC)
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage (Main) | VCC | 2.6 | 2.8 | 3.3 | V |
| I/O Supply voltage | IOVCC | 1.65 | 1.8 | 3.3 | V |
| Input Voltage (L) | VIL | VSS | -- | 0.3*IOVCC | V |
| Input Voltage (H) | VIH | 0.7*IOVCC | -- | IOVCC | V |
3.2.3 Pin Description (24-pin FPC) – Integrated LCM & CTP
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | CS | I | Chip select pin. Low Enable. |
| 2 | DA0 | I | QSPI Data pin 0. |
| 3 | DA1 | I | QSPI Data pin 1. |
| 4 | SCL | I | The serial input/output clock in serial interface mode. |
| 5 | DA3 | I | QSPI Data pin 3. |
| 6 | DA2 | I | QSPI Data pin 2. |
| 7, 8, 10, 11 | NC | Not Connected. | |
| 9 | RESET | I | Reset signal. Must be applied to properly initialize the LCD driver chip. |
| 12 | GND | P | Ground. |
| 13 | TE | O | Tearing effect output. |
| 14 | IOVCC | P | I/O Logic Power supply (1.65-3.3V). |
| 15 | VCI | P | Analog/Main Power supply (2.6-3.3V). |
| 16 | LEDK | P | Power for LED backlight cathode. |
| 17 | LEDA | P | Power for LED backlight anode. |
| 18 | GND | P | Ground. |
| 19 | TP_SCL | I | I²C clock pin for the Capacitive Touch Panel (CTP). |
| 20 | TP_SDA | I/O | I²C data pin for the Capacitive Touch Panel (CTP). |
| 21 | TP_RST | I | Reset Pin for the CTP controller. |
| 22 | TP_INT | I | Interrupt signal output from the CTP controller. |
| 23 | TP_VDD | P | Power supply for the CTP controller. |
| 24 | TP_GND | P | Ground for the CTP. |
3.2.4 Critical Interface Timing
A. QSPI Interface AC Characteristics:
Conditions: VDDI=1.65-3.3V, VDD=2.4-3.3V, Ta=25°C. Key parameters include:
| Signal | Symbol | Parameter | Min | Max | Unit | Description |
|---|---|---|---|---|---|---|
| CSX | TCS | Chip select setup time (write) | 19 | -- | ns | |
| CSX | TCSH | Chip select hold time (write) | 19 | -- | ns | |
| CSX | TCSS | Chip select setup time (read) | 60 | -- | ns | |
| CSX | TSCC | Chip select hold time (read) | 65 | -- | ns | |
| CSX | TCHW | Chip select "H" pulse width | 40 | -- | ns | General |
| CSX | TCHW | Chip select "H" pulse width | 500 | -- | ns | After sending display data (CMD 0x006000) |
| SCL | TSCYCW | Serial clock cycle (Write) | 16 | -- | ns | |
| SDA (DIN) | TSDS | Data setup time | 7 | -- | ns | |
| SDA (DIN) | TSDH | Data hold time | 7 | -- | ns | |
| DOUT | TACC | Access time (Read) | 10 | 50 | ns | CL=8-30pF |
B. Reset Timing:
| Related Pins | Symbol | Parameter | MIN | MAX | Unit | Note |
|---|---|---|---|---|---|---|
| RESX | TRW | Reset pulse duration | 10 | - | us | |
| RESX | TRT | Reset cancel time | - | 5 | ms | After HW reset, includes register load from NVM |
| RESX | TRT | Reset cancel time | - | 120 | ms | In Sleep Out mode |
C. Color Data Formats: The QSPI interface supports RGB888 (24-bit), RGB666 (18-bit), and RGB565 (16-bit) color formats, with timing diagrams provided for each.
3.2.5 Backlight Unit
- Configuration: White LED(s).
- Drive Condition: Forward Current (I_F) = 60mA (Typical); Forward Voltage (V_f) = 2.8V ~ 3.3V (Typical).
3.2.6 Touch Panel (CTP) Specifications
- Controller: CST816 (referenced in drawing notes).
- Interface: I²C (TP_SDA, TP_SCL).
- Additional Controls: Dedicated reset (TP_RST) and interrupt (TP_INT) pins.
- Power: Separate supply pin (TP_VDD).
3.3 Optical & Electro-Optical Characteristics
- Module Luminance: 400 cd/m² (without CTP), 300 cd/m² (with CTP, as per some drawing notes).
- Viewing Direction: All (IPS).
- Materials Compliance: All materials comply with RoHS and Halogen-Free standards.
4. Application Guidelines & Critical Notes
- Intended Use: Premium wearables (smartwatches), high-end handheld instruments, portable medical devices, compact HMIs—any application requiring a sharp, colorful square display with integrated touch in a minimal footprint.
- Critical Design Considerations:
- Dual Function Module: Treat this as two devices in one: an LCD and a touch panel. Both require proper power sequencing and initialization.
- Dual Power Supplies: Provide stable 2.8V (VCI) and 1.8V (IOVCC). The touch controller (TP_VDD) may require its own regulated supply; check the CTP controller datasheet (CST816).
- Critical QSPI Timing Note: Pay special attention to the 500ns minimum CSX high pulse width after sending display data (CMD 0x006000). This is a specific requirement for this driver IC and must be respected in your SPI driver code.
- High Pin Count: The 24-pin FPC carries signals for both display and touch. Ensure your connector and cable assembly support all lines reliably.
- Brightness: The high luminance (400 cd/m²) is suitable for outdoor or bright ambient light use. The backlight requires a 60mA constant-current driver.
- Mechanical Stack-Up: The total thickness of 2.68mm includes the CTP. Follow the outline drawings precisely for bezel and foam cutout design to avoid pressure on the panel or touch sensor.
- Environmental: Operating temperature range is -20°C to +70°C.
- Handling & Compliance: The module is RoHS and Halogen-Free compliant. Observe extreme ESD precautions due to the integrated capacitive touch sensor.
5. Conclusion & Design-In Support
The LSC016I02-QS-V1 specification details a high-performance, fully-integrated 1.6-inch touch display module. Its key strengths are the high 400x400 resolution on a square IPS panel, true 16.7M color depth, and the convenience of an integrated capacitive touch layer. The QSPI interface offers a good balance of speed and pin count for driving this resolution. The main design complexities are managing the dual power domains and adhering to the specific QSPI timing rule (500ns CSX high after display data). Furthermore, the touch panel integration requires a separate I²C driver and handling of the interrupt signal. By meticulously following the electrical, interface, and mechanical specifications for both the LCD and CTP sections, engineers can leverage this module to create sleek, interactive products with outstanding visual fidelity.
