4.0″ 480×480 UART HMI Touch Display

4.0″ High-Brightness UART HMI Display for Embedded Control

The ND040SSG480480-A01 is a compact 4.0-inch UART HMI touch display designed for embedded control, industrial interfaces, smart equipment, and interactive display applications. It combines a 480×480 IPS TFT display, 1000 cd/m² brightness, capacitive touch, an LT7689 HMI controller, and TTL UART or RS-232 communication options in a compact open-frame module. RS-485 communication can be added based on project requirements.

Key Features

• 4.0-Inch Square IPS Display: 480×480 resolution in a compact square format for embedded user interfaces.
• High-Brightness Display: 1000 cd/m² brightness for improved visibility in bright indoor and semi-outdoor environments.
• Capacitive Touch Control: GT911-based capacitive touchscreen for responsive and intuitive operation.
• LT7689 HMI Platform: Integrated LT7689 controller supports graphical interface operation and serial communication.
• Serial Interface Options: Available with TTL UART or RS-232 communication. RS-485 can be added as an optional project configuration.
• 5 V Power Input: Supports 5 V DC input through the designated power connector or USB Type-C power port.
• Wide-Temperature Operation: Designed for operation from −30°C to +70°C.
• Compact Embedded Structure: 77.0 × 80.0 × 15.31 mm open-frame module for integration into custom equipment.
• Additional Functions: Speaker output and an external RTC battery connector are available for interactive equipment applications.

4.0″ UART HMI Touch Display Technical Specifications

Model	ND040SSG480480-A01
Display	4.0″ IPS TFT, 480 × 480
Brightness	1000 cd/m²
Touch	Capacitive Touchscreen
Touch Controller	GT911
HMI Controller	LT7689
Communication Protocol	UART Serial Protocol
Interface Options	TTL UART or RS-232
Optional Interface	RS-485 expansion
Power Input	5 V DC
USB Type-C	Power Input
Communication Connector	6-Pin Connector
Audio	Speaker Output
RTC	External Battery Connector
Overall Dimensions	77.0 × 80.0 × 15.31 mm
Active Area	72.56 × 70.88 mm
Mounting	Open-Frame / Embedded Integration
Operating Temperature	−30°C to +70°C

Display Drawing

Interface Definition

Confirm the selected TTL UART, RS-232, or optional RS-485 hardware configuration before wiring.

①Communication port: CON1:Molex:53261-0671
NO.		SYMBOL			DISCRIPTION	I/O
1		5V			Power supply.	P
2		GND			Ground.	P
3		232_TXD			RS-232 driver output.	O
4		232_RXD			RS-232 receiver input.	I
5		BUSY			No function.	/
6		GND			Ground.	P
②Speaker port: CON2:Molex:533980271
NO.		SYMBOL			DISCRIPTION	I/O
1		SPK+			Speaker positive.	O
2		SPK-			Speaker cathode.	0
③RTC battery port: CON3:Molex:533980271
NO.		SYMBOL			DISCRIPTION	I/O
1		BAT+			Battery positive.	P
2		GND			Battery cathode.	P
④Type C conne ctor only for power supply.

Customization Options

Hardware Customization

Optional customization includes display brightness, touch solution, PCBA functions, connector layout, power input, speaker output, RTC functions, and mechanical structure.

Interface Customization

Available communication options include TTL UART and RS-232. RS-485, CAN, or other interfaces may be developed based on project requirements and technical evaluation.

Software & UI Customization

Optional services include GUI development, communication protocol customization, multilingual fonts, boot screens, icons, themes, and application-specific interface design.

Environmental Customization

Optional enhancements may include optical bonding, customized cover glass or enclosures, EMC improvements, and upgraded environmental protection. Final specifications are subject to engineering evaluation.