Tags & Keywords
#TFT-LCD #IPS #SPI #8080 #1.9inch #170x320 #262KColors #DualInterface #EmbeddedDisplay #IndustrialHMI #PortableDevice #MCUInterface #WideViewingAngle #RoHS #LESSON #SmartDisplay
Introduction
This document is the official product specification for the LS19I03-SM-V1, a 1.9-inch transmissive a-Si TFT-LCD module developed by LESSON Smart Display Technology Co., Ltd. Featuring a tall 170x320 pixel resolution, 262K colors, and an IPS panel for wide viewing angles, this module offers exceptional interface flexibility. Supporting both SPI and 8080 parallel interfaces, it provides developers with options to optimize for speed or pin count, making it a versatile solution for industrial controls, portable medical devices, consumer electronics, and various embedded systems.
Key Specifications
- Brand & Model: LESSON Smart Display LS19I03-SM-V1
- Screen Size: 1.9 inches (diagonal)
- Active Area: 22.7 mm (H) × 42.72 mm (V)
- Driver IC: ST7789T3 (as indicated in the Physical Features section)
- Display Technology: Transmissive type a-Si TFT-LCD
- Display Mode: Active matrix TFT, Transmissive, IPS (In-Plane Switching)
- Module Type: COG + FPC + B/L
- Display Resolution: 170(RGB) × 320 pixels
- Display Colors: 262 Thousand Colors (262K)
- Module Outline Dimensions: 25.8 mm (H) × 49.73 mm (V) × 1.47 mm (D)
- Interface: Dual Interface: SPI/8080 Parallel (Selectable via IM1/2 pin)
- Input Data: SPI / 8080 8-bit parallel
- Viewing Direction: IPS (All)
- Drive IC: ST7789T3
- Supply Voltages:
- VCC (Main Power): 2.4V ~ 3.3V (Typical: 2.8V)
- IOVCC (I/O Power): 1.65V ~ 3.3V (Typical: 1.8V)
- Absolute Maximum Ratings:
- VCC / IOVCC: -0.3V to +4.6V
- Operating Temperature (T_OPR): -20°C to +70°C
- Storage Temperature (T_STR): -30°C to +80°C
- Backlight: White LED
- Environmental Compliance: RoHS Compliant
General Description
The LS19I03-SM-V1 is a flexible display module built around a wide-viewing-angle IPS panel. Its 1.9-inch tall aspect ratio is perfect for displaying lists, status bars, or vertical GUIs. The module is controlled by the ST7789T3 driver IC, which supports dual interface modes:
- 4-line SPI: For minimal pin count (CS, SCL, SDA, DC).
- 8080 8-bit Parallel: For higher data transfer speed (using D0-D7 data bus, WR, RD, RS, CS).
The interface mode is selected by the IM1/2 pin. The specification provides exhaustive timing characteristics tables for both interfaces—separate tables for 8080 write/read cycles and SPI write/read cycles—giving developers precise parameters for reliable communication. The pin description clearly maps functions for both interface modes.
Pin Description (Key Pins for Both Modes)
| PIN NO. | Symbol | I/O | Description (SPI Mode / 8080 Mode) |
|---|---|---|---|
| 1 | RESET | I | Reset pin (common) |
| 2 | RS | I | SPI Clock (SCL) / 8080 Data-Command (RS) |
| 3 | WR | I | SPI Data (SDA) / 8080 Write Enable (WR) |
| 4 | RD | I | Not used (fix high/low) / 8080 Read Enable (RD) |
| 5 | CS | I | Chip Select (common) |
| 9 | IM1/2 | I | Interface select: 1=SPI, 0=8080 |
| 13-20 | D7-D0 | I | Not used (SPI) / 8-bit Data Bus (8080) |
Application Scenarios
- Industrial Handhelds: Data loggers, meters, portable test equipment (can use fast 8080 or simple SPI).
- Portable Medical Devices: Monitors, diagnostic equipment (benefits from IPS clarity).
- Consumer Electronics: Smart home controllers, portable devices.
- Automotive Aftermarket: Displays for diagnostic tools or add-on systems.
- Prototyping & Development: Flexibility to choose interface based on MCU.
Conclusion
The LESSON Smart Display LS19I03-SM-V1 stands out for its exceptional interface flexibility, allowing designers to choose between SPI for simplicity or 8080 parallel for speed. Combined with IPS display quality, clear dual-interface timing specs, and a compact form factor, it is a highly adaptable and reliable choice for a broad spectrum of embedded display applications.
