LMT028DHHFWL-NBN 2.8-inch TFT color LCD module TOPWAY
320x240 Color TFT
Display Controller ST7789VI or equivalent
Internal Reference:
LMT028DHHFWL.NBN
Product Description
The TOPWAY LMT028DHHFWL-NBN is a 2.8-inch TFT color LCD module designed for embedded systems, industrial control equipment, portable instruments, and microcontroller-based applications.
Featuring a 320 × 240 pixel resolution and 65K color support, this display provides a compact graphical interface for presenting measurements, menus, icons, status information, and other visual content.
The module uses a transmissive a-Si TFT active-matrix panel with an RGB stripe pixel configuration and a glare-treated polarizer surface. It is driven by an ST7789VI or equivalent display controller and communicates through an 8-bit 8080 parallel system bus.
The display operates from a 5V main supply, with a separate logic supply (IOVDD) supporting 1.65V to 3.6V. Its integrated LED backlight provides typical luminance of 250cd/m² and includes a BLEN control input for backlight ON/OFF operation and brightness adjustment.
With its 79.3 × 49.1mm outline and 20-pin signal interface plus unused NC positions as specified in the manufacturer's terminal table, the LMT028DHHFWL-NBN is suitable for integration into custom electronic products and embedded display assemblies.
Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | TOPWAY Technology |
| Model | LMT028DHHFWL-NBN |
| Product Type | TFT Color LCD Module |
| Screen Size | 2.8 inches |
| Resolution | 320 × 240 pixels |
| Color Depth | 65K colors |
| Display Technology | a-Si TFT Active Matrix |
| Display Mode | Transmissive / Positive |
| Pixel Configuration | RGB Stripe |
| Display Controller | ST7789VI or equivalent |
| Communication Interface | 8-bit 8080 Parallel |
| Main Supply Voltage (VDD) | 4.8–5.2V DC |
| Typical Main Supply | 5.0V DC |
| Logic Supply Voltage (IOVDD) | 1.65–3.6V DC |
| Operating Current (Backlight ON) | 74.5mA typical, 85mA maximum |
| Operating Current (Backlight OFF) | 6.25mA typical, 16mA maximum |
| Active Display Area | 57.6 × 43.2mm |
| Dot Pitch | 0.18 × 0.18mm |
| Backlight Type | LED |
| Backlight Control | BLEN input |
| Typical Luminance | 250cd/m² |
| Minimum Luminance | 200cd/m² |
| Typical Contrast Ratio | 500:1 |
| Minimum Contrast Ratio | 300:1 |
| Typical Response Time | 30ms |
| Maximum Response Time | 50ms |
| Typical NTSC Color Gamut | 65% |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Overall Dimensions | 79.3 × 49.1 × 6.8mm maximum |
Technical Information
1. Display Technology and Resolution
The LMT028DHHFWL-NBN uses an a-Si TFT active-matrix display panel with RGB stripe pixel configuration.
| Display Parameter | Specification |
|---|---|
| Screen Size | 2.8 inches |
| Resolution | 320 × 240 pixels |
| Color Depth | 65K colors |
| Display Technology | TFT Active Matrix |
| Display Mode | Transmissive / Positive |
| Pixel Configuration | RGB Stripe |
| Active Area | 57.6 × 43.2mm |
| Dot Pitch | 0.18 × 0.18mm |
| Polarizer Surface | Glare |
The 320 × 240 resolution provides 76,800 pixels, making the display suitable for graphical user interfaces, measurement readings, icons, menus, and embedded control applications.
2. Display Controller
The module uses an ST7789VI or equivalent display controller.
The controller manages display initialization, pixel data transfer, memory access, and display configuration.
Supported display commands include:
- Software and hardware reset.
- Display identification and status reading.
- Sleep mode and display ON/OFF control.
- Display inversion.
- Column and row address configuration.
- Memory read and write.
- Partial display mode.
- Vertical scrolling.
- Display brightness control.
- Content-adaptive brightness control.
- Gamma and color configuration.
3. Communication Interface
The LMT028DHHFWL-NBN uses an 8-bit 8080 parallel system bus.
The parallel interface transfers display commands and pixel data through the D0–D7 data bus.
Main interface signals include:
| Pin | Function |
|---|---|
| D0–D7 | 8-bit bidirectional data bus |
| /CS | Active-low chip select |
| /WR | Active-low write enable |
| /RD | Active-low read enable |
| D/C | Register and data selection |
| /RES | Active-low reset |
| FMARK | Display timing frame signal |
| BLEN | Backlight enable and control |
| VDD | Positive power supply |
| VSS | Ground |
D/C Signal Operation
- D/C = HIGH: Transfers display data.
- D/C = LOW: Transfers control data.
Chip Select
- /CS = LOW: Enables access to the LCD module.
- /CS = HIGH: Disables access to the LCD module.
The interface is an 8080 parallel bus. The datasheet does not specify SPI or I2C communication for this model.
4. Electrical Characteristics
The module uses a 5V main supply and a separate logic supply.
| Parameter | Minimum | Typical | Maximum |
|---|---|---|---|
| Main Supply (VDD) | 4.8V | 5.0V | 5.2V |
| Logic Supply (IOVDD) | 1.65V | 3.0V | 3.6V |
| Operating Current, Backlight ON | — | 74.5mA | 85mA |
| Operating Current, Backlight OFF | — | 6.25mA | 16mA |
The operating-current values are specified under the manufacturer's test conditions of VDD = 5V and VSS = 0V.
The logic input levels are referenced to IOVDD:
- Input HIGH: At least 0.7 × IOVDD.
- Input LOW: No more than 0.3 × IOVDD.
The module should be operated within its specified electrical limits. The absolute maximum ratings are stress limits, not recommended operating conditions.
5. LED Backlight and Brightness Control
The display includes an integrated LED backlight controlled through the BLEN input.
The BLEN signal provides:
- Backlight ON/OFF control.
- Brightness adjustment through the control timing described in the datasheet.
- Shutdown control.
The terminal description specifies:
- BLEN = HIGH: Backlight ON.
- BLEN = LOW: Backlight OFF.
The backlight control timing section defines pulse timing for brightness adjustment and shutdown. For basic ON/OFF operation, the specified minimum pulse widths must be observed.
6. Optical Characteristics
The LMT028DHHFWL-NBN provides the following optical characteristics according to the manufacturer's datasheet.
| Parameter | Minimum | Typical | Maximum |
|---|---|---|---|
| Viewing Angle, Φ = 90° | 50° | 60° | — |
| Viewing Angle, Φ = 270° | 50° | 60° | — |
| Viewing Angle, Φ = 180° | 40° | 50° | — |
| Viewing Angle, Φ = 0° | 50° | 60° | — |
| Contrast Ratio | 300:1 | 500:1 | — |
| Response Time | — | 30ms | 50ms |
| Luminance | 200cd/m² | 250cd/m² | — |
| NTSC Color Gamut | 45% | 65% | — |
| Luminance Uniformity | 80% | — | — |
The viewing-angle values are measured at a contrast ratio of at least 10. Viewing-angle performance varies with direction, so the module should be mounted with the intended viewing position in mind.
7. Mechanical Dimensions and Connector
The module is designed for integration into embedded electronic equipment and custom display assemblies.
| Parameter | Specification |
|---|---|
| Overall Width | 79.3mm |
| Overall Height | 49.1mm |
| Maximum Thickness | 6.8mm |
| Active Display Area | 57.6 × 43.2mm |
| Display Connection | K1 terminal |
| Signal Interface | 8-bit parallel |
The manufacturer's mechanical drawing provides the detailed module outline, mounting-hole locations, connector arrangement, and display orientation.
Refer to the datasheet drawing when designing the PCB footprint or mechanical enclosure.
8. Operating Temperature and Handling
| Parameter | Specification |
|---|---|
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
The manufacturer recommends entering Sleep Mode before powering off the LCD module.
It also recommends periodically refreshing the operating modes and display contents to reduce the effects of unexpected electrical noise.
Features
- 2.8-Inch TFT Color Display: Compact display for embedded graphical interfaces.
- 320 × 240 Resolution: Provides 76,800 display pixels.
- 65K Colors: Supports color graphics, icons, and interface elements.
- ST7789VI Controller: Uses an ST7789VI or equivalent display controller.
- 8-Bit Parallel Interface: Uses an 8080 system bus for communication.
- 5V Main Supply: Operates from a typical 5V DC supply.
- Separate Logic Supply: Supports IOVDD from 1.65V to 3.6V.
- Integrated LED Backlight: Provides typical luminance of 250cd/m².
- Backlight Control: BLEN input supports backlight ON/OFF and brightness control.
- Compact Design: Approximately 79.3 × 49.1 × 6.8mm maximum.
- Wide Operating Temperature: Supports operation from -20°C to +70°C.
Applications
- Embedded graphical user interfaces.
- Industrial control equipment.
- Portable electronic instruments.
- Measurement and monitoring devices.
- Microcontroller-based projects.
- Smart home controllers.
- IoT monitoring systems.
- Electronic control panels.
- Custom embedded display assemblies.
- Electronic product development and prototyping.
Frequently Asked Questions (FAQ)
1. What is the resolution of the TOPWAY LMT028DHHFWL-NBN?
The display has a resolution of 320 × 240 pixels and a diagonal screen size of 2.8 inches.
2. How many colors does this LCD support?
The LMT028DHHFWL-NBN supports 65K colors.
3. Which display controller does this module use?
The module uses an ST7789VI or equivalent display controller.
4. Does the LMT028DHHFWL-NBN support SPI communication?
The manufacturer's datasheet specifies an 8-bit 8080 parallel system bus. It does not specify SPI or I2C communication for this model.
5. What is the operating voltage of this LCD?
The main supply (VDD) operates from 4.8V to 5.2V, with a typical value of 5V. The separate logic supply (IOVDD) supports 1.65V to 3.6V.
6. What is the brightness of the display?
The manufacturer specifies a typical luminance of 250cd/m², with a minimum value of 200cd/m².
7. Can the backlight brightness be controlled?
Yes. The module includes a BLEN control input. The datasheet describes backlight ON/OFF operation and brightness adjustment using specific control timing.
8. Is the LMT028DHHFWL-NBN suitable for Arduino and ESP32 projects?
It can be integrated into compatible Arduino or ESP32-based designs if the required 8-bit 8080 parallel interface, supply voltages, logic levels, and controller initialization are supported. It is not a direct SPI display and requires suitable parallel-interface connections and software support.
Download
- LCD Datasheet (Click Here)
- 80mode, ST7789VI 【Sample Code】
- C Sample Code (Arduino) 【Sample Code】