Product Main Title:
LS0144T08-S-V1: 1.44-Inch TFT LCD Module, 128x128 Resolution, 262K Colors, 4-Line Serial Interface, NV3023A/ST7735P Driver, for Compact Embedded Applications

Product Subtitle / Keywords:
1.44 Inch TFT Display, 128x128 Resolution, Transmissive a-Si TFT, 4-Line Serial Interface (SPI), COG+FPC+B/L, 262K Colors, -20°C to +60°C Operation, Detailed Serial Timing, Pinout & Power Sequencing

Comprehensive Technical Specification & Application Guide

1. Executive Summary & Product Positioning

The LS0144T08-S-V1, developed by LESSON (Wan'an) Zhixian Technology Co., Ltd., is a compact 1.44-inch 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, power-on/off sequences, and electro-optical performance. It delivers a resolution of 128(RGB)×128 with 262K-color display capability. The document provides a complete technical basis for design-in, covering all critical aspects from physical structure to interface protocol. The unequivocal recommendation for engineers is to strictly adhere to the mechanical tolerances, electrical limits, interface timing, and power sequencing described herein to ensure reliable module operation and achieve the specified display performance.

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).
• Driver IC: Documents indicate two possible drivers: NV3023A (in one version) and ST7735P3 (in another "冠宇" version). Verify the specific driver IC for your purchase order.
• Viewing Direction: 12 o'clock.

3. Exhaustive Technical Specifications

3.1 Mechanical & Physical Specifications

• Panel Size (Diagonal): 1.44 inches
• Active Area (H×V): 25.49 mm × 26.5 mm
• Module Size (H×V×D): 27.9 mm × 32.64 mm × 2.1 mm
• Resolution: 128 (RGB) × 128 pixels
• General Tolerance: ±0.20 mm

3.2 Electrical & Interface Specifications

3.2.1 Absolute Maximum Ratings

3.2.2 Electrical Characteristics (DC, Ta=25°C)

3.2.3 Pin Description (15-pin FPC)

3.2.4 Critical Interface Timing

A. Reset Timing:

B. 4-Line Serial Interface Timing (Write/Read): The specification provides detailed timing parameters for Chip Select (tcss, tcsh), Serial Clock cycle and pulse widths (twc, twrh, twrl for write; trc, trdh, trdl for read), and Data setup/hold times (tds, tdh). Specific min/max values are listed in the document (e.g., twc min 16 ns for write).

3.2.5 Power On/Off Sequence

Two initialization options are provided:

• Option 1: Host sends initial setting commands, followed by SLPOUT and DISP ON.
• Option 2: Host only sends SLPOUT and DISP ON commands.
  Critical timing includes:
• Power-up ramp time for VCI/IOVCC (t_Ramp): Min 0.2 ms, Max 20 ms.
• Reset low pulse (TRESETL) ≥ 10 µs.
• Delay between power stable and command (t_RPWI_RES) ≥ 10 ms.

3.2.6 Backlight Unit

• Configuration: 2-chip white LED.
• Drive Condition: Forward Current (I_F) = 40mA (Typical); Forward Voltage (V_f) = 2.8V ~ 3.2V.

3.3 Optical & Electro-Optical Characteristics (Ta=25°C)

4. Application Guidelines & Critical Notes

• Intended Use: Wearable devices, portable instruments, smart home interfaces, hobbyist projects—any application requiring a small, colorful display with a simple serial interface.
• Critical Design Considerations:
  1. Driver IC Variant: Confirm whether your module uses the NV3023A or ST7735P3 driver, as initialization sequences may differ.
  2. Dual Power Supplies: Provide stable 2.8V (VCC/VDD) and 1.8V (IOVCC) supplies. IOVCC defines the logic high/low thresholds.
  3. Mandatory Power Sequencing: Strictly follow one of the two provided power-on sequences. Incorrect sequencing can lead to display failure or damage.
  4. Reset Circuit: Ensure the RESET pulse meets the minimum 10 µs width. Observe the different reset complete times (5ms vs 120ms) depending on the sleep mode.
  5. SPI Timing Compliance: The host microcontroller's SPI peripheral must meet the module's setup, hold, and cycle time requirements, especially noting the slower timing for read operations.
  6. Backlight Driver: Use a constant-current driver set for 40mA.
• Handling & Assembly: Observe the FPC bend guidelines in the outline drawing. Follow standard ESD precautions.

5. Conclusion & Design-In Support

The LS0144T08-S-V1 specification provides a comprehensive guide for integrating a reliable 1.44-inch SPI display. Its key strengths are the exceptionally detailed power sequencing diagrams and complete serial interface timing, which are critical for successful initialization. Designers must pay utmost attention to the power-up sequence and reset timing to avoid common pitfalls. The potential for two different driver ICs (NV3023A/ST7735P3) necessitates verification with your supplier. By meticulously following the electrical, timing, and mechanical specifications, engineers can reliably integrate this compact color display into their embedded systems.