The HKT070DTA-1C Topway LCD is a 7 inch smart TFT display module that talks to your controller over a simple serial link, so the screen handles the graphics while your board handles the logic. It is built as a 7 inch RS232 TFT LCD display with 800x480 resolution and a resistive touch panel, which makes it a practical choice for control panels, machine interfaces and engineering graduation projects.
Specifications
- Internal Reference: HKT070DTA.1C
- Resolution: 800x480
- Interface: RS232
- Voltage: 11V~26V
- Temperature: -20°C ~ 70°C
- Outline: 200mm x 125mm x 30mm
- Size: 7"
- Protocol: Topway
- Active Area: 154.08mm x 85.92mm
- Touch Screen: RTP
- Casing: PC/ABS
Specifications Details
| Parameter | Specification |
|---|---|
| Manufacturer | TOPWAY Technology Co., Ltd. |
| Model | HKT070DTA-1C |
| Product Type | Smart TFT LCD HMI Module |
| Screen Size | 7 inches |
| Resolution | 800 × 480 pixels |
| Color Depth | 65K colors (16-bit) |
| Pixel Configuration | RGB Stripe |
| Display Mode | Transmissive / Normally White |
| Viewing Direction | 6H (grayscale inverse) / 12H (normal) |
| Active Area | 154.08 × 85.92mm |
| Outline Dimensions | 200.0 × 125.0 × 30.0mm (maximum) |
| Touch Panel | Resistive Touch Panel |
| Backlight | LED |
| Command Interface | RS232C |
| Project Download | PC or USB drive (with OTG cable) |
| USB Interface | USB |
| Integrated Controller | 32-bit MCU |
| Graphics Engine | Integrated |
| Flash Memory | Supported; capacity not specified in datasheet |
| RTC | Supported, without battery |
| Buzzer | Built-in |
| Display Rotation | 90-degree rotation support |
| Operating Voltage | 11–26V DC |
| Typical Supply Voltage | 12V DC |
| Typical Operating Current | 280mA |
| Typical USB Operating Current | 200mA |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
Technical Information
1. Display and Touch Panel
The HKT070DTA-1C features a 7-inch TFT LCD with an 800 × 480 pixel resolution and 65K colors.
The display uses transmissive, normally white technology with LED backlighting and an integrated resistive touch panel.
According to the manufacturer's optical specifications:
- Typical luminance: 500cd/m².
- Typical contrast ratio: 900:1.
- Typical horizontal viewing angles: 80° left and 80° right.
- Typical vertical viewing angles: 80° top and 60° bottom.
- Typical response time: 20ms.
- Maximum specified response time: 30ms.
- Typical luminance uniformity: 80%.
- Typical NTSC color gamut: 50%.
2. Integrated MCU and Graphics Engine
The module integrates a 32-bit MCU and graphics engine to manage display operations and graphical content.
It supports TOPWAY SGTools for designing graphical interfaces and preparing display projects.
The interface can be designed and stored in the module before operation, allowing the display to handle its graphical interface and touch responses independently of the host controller.
The module's internal memory architecture includes:
- TML Files: Store the graphical interface layout and operating flow.
- Picture Files: Store images used in the interface.
- Icon Files: Store graphical icons and interface elements.
- Custom Memories: Flash-memory areas accessible through the UART interface.
- VP Variables: RAM-based variables that allow real-time data exchange between the display and the host controller.
The datasheet confirms internal flash memory but does not specify its total storage capacity.
3. RS232C Serial Communication
The HKT070DTA-1C communicates with external controllers through its RS232C serial interface.
The accompanying TOPWAY SMART LCD Command V5.04 manual specifies the default communication configuration as:
- Baud rate: 115200bps.
- Data bits: 8.
- Parity: None.
- Stop bits: 1 (8N1).
The K1 connector provides the following signals:
| Pin | Signal | Function |
|---|---|---|
| 1 | VSS | Ground (0V) |
| 2 | NC | No connection; leave open |
| 3 | RTS (BUSY) | Request-to-send / busy signal |
| 4 | TX | Serial data output |
| 5 | RX | Serial data input |
| 6 | VDD | Power supply input (11–26V DC) |
The host controller can use the serial command protocol to:
- Read the current display page ID.
- Receive touch coordinates and touch-key responses.
- Update numerical and text variables.
- Read and write display memory.
- Control backlight brightness.
- Control the built-in buzzer.
- Read and set RTC values.
- Switch between preloaded display pages.
Important: The communication interface is RS232C, not a standard 3.3V or 5V TTL UART. A suitable RS232-to-TTL level converter is required when connecting the display to common microcontrollers such as Arduino or ESP32.
4. USB Interface and Project Download
The HKT070DTA-1C provides a USB interface for downloading graphical projects and resources.
The K2 connector includes:
| Pin | Signal | Function |
|---|---|---|
| 1 | VUSB | USB 5V supply |
| 2 | D- | USB data negative |
| 3 | D+ | USB data positive |
| 4 | ID | USB identification |
| 5 | VSS | Ground |
The USB interface supports transferring TML files, pictures, and icon resources to the display. It also provides standard USB-drive functionality.
Project files can be downloaded from a PC or through a USB drive using an appropriate OTG cable.
During file transfer, other display functions are suspended.
5. Power Supply and Electrical Characteristics
The HKT070DTA-1C operates from an 11–26V DC supply, with 12V specified as the typical operating voltage.
| Parameter | Specification |
|---|---|
| Minimum Operating Voltage | 11V DC |
| Typical Operating Voltage | 12V DC |
| Maximum Operating Voltage | 26V DC |
| Typical Operating Current | 280mA |
| Typical USB Operating Current | 200mA |
The current values are specified under the manufacturer's test conditions. Actual current consumption may vary depending on operating conditions.
6. Built-In Functions
The HKT070DTA-1C includes several integrated functions for embedded HMI applications:
- RTC: Supports real-time clock operations through the command interface. The datasheet specifies RTC without a battery.
- Buzzer: Built-in audible feedback, with control through the serial command protocol.
- Backlight Control: Supports brightness adjustment through 64 levels.
- Touch Control: Supports touch-coordinate and touch-key responses.
- 90-Degree Rotation: Supports alternative display orientation.
- Custom Memory Access: Allows the host controller to access supported flash-memory areas.
- VP Variables: Enables real-time exchange of numerical and text data between the host and display.
Features
- IP65 waterproof and dustproof bezel, anti-UV coating, suitable for outdoor environment
- Wide operating voltage
- Upgradable through PC or USB OTG
- Stable and reliable resistive touch
- Smart LCD Module Development Tool - SGTools
7 Inch RS232 TFT LCD Display With 800x480 Resolution
This 7 inch RS232 TFT LCD display gives you an 800x480 pixel area of 154.08 x 85.92 mm, a larger canvas than the 5 inch version for gauges, charts, buttons and status text on one screen. According to the manufacturer's manual, the panel shows 65k colors (16-bit), reaches a typical brightness of 500 cd/m² and has a typical contrast ratio of 900 (700 minimum). The resistive touch panel responds to a finger, a stylus or a gloved hand.
Industrial Smart TFT LCD Module for Serial Control
As an industrial smart TFT LCD module, the HKT070DTA-1C has a 32-bit MCU on board, so your controller does not need to draw every pixel. You design the screens in advance with the SGTools development tool, load them into the module, and then your controller only sends short serial commands over RS232 to change what is shown. The default serial setting is 115200 bps, 8N1, and projects can be downloaded from a PC or from a USB drive using an OTG cable. This keeps your main code simple and works with any controller that can send serial data, as long as the signal levels match.
Resistive Touch TFT LCD 800x480: Power and Mounting
The resistive touch TFT LCD 800x480 module accepts a supply of 11V to 26V, with 12V as the typical value. Because the minimum is 11V, a 12V supply is the practical choice, and a 5V supply will not work. Before connecting the serial lines to a 3.3V or 5V microcontroller, check the logic level of your controller against the RS232 interface of the module and use a level converter if needed. The casing measures 200 x 125 x 30 mm, and the operating temperature range is -20°C to 70°C.
Need a different screen size from the same Topway family? See the HKT050ATA-C 5" Topway LCD or the HKT104ATA-C 10.4" Topway LCD, or browse the full UART smart TFT LCD category.
Frequently Asked Questions
What interface does the HKT070DTA-1C use?
It uses an RS232 serial command interface with the Topway protocol. The default setting is 115200 bps, 8N1.
What is the resolution and size of this display?
It is a 7 inch TFT display with an 800x480 resolution and an active area of 154.08 x 85.92 mm.
Is the HKT070DTA-1C resistive or capacitive touch?
It uses a resistive touch panel (RTP).
How to power a Topway smart LCD like this one?
The module accepts 11V to 26V, with 12V typical. Connect the supply and ground to the power terminal and the RX/TX lines to your controller's serial port.
How to update a Topway smart LCD with new screens?
You can download your project from a PC or from a USB drive with an OTG cable. The screens are prepared in advance with the SGTools development tool.
Can I use it with a microcontroller board?
Yes, any controller that can send serial commands can drive it. Check that the logic levels match, and add a level converter when required.
What temperature range does it support?
Its operating temperature range is -20°C to 70°C.
The HKT070DTA-1C Topway LCD combines a 7 inch 800x480 screen, resistive touch, an 11V to 26V supply and simple serial control in one module. If you are building a control panel or planning engineering graduation projects this term, RAM Electronics offers the HKT070DTA-1C in Egypt along with the rest of the Topway smart LCD range. Contact us if you need help choosing the right screen size.