Description
Resistive Touchscreen Product Basic Overview
The HTM-H024B25-MCU-A01R is a 2.4-inch industrial integrated TFT LCD display module equipped with a Resistive Touchscreen. It delivers crisp, high-definition imagery with a 240 (RGB)×320 resolution and reproduces natural, vibrant colors with a 55% NTSC wide color gamut. The module comes standard with a 400 cd/m² typical brightness, professionally calibrated through a constant-current backlight driver, and features a built-in backlight drive circuit that significantly simplifies peripheral hardware wiring. The module supports both 8Bit and 16Bit MCU parallel interfaces, making it compatible with most mainstream main control solutions. Its 2.8–5.0V wide voltage input accommodates diverse power supply scenarios.
The product boasts excellent wide-temperature performance, with a normal operating range of -20°C to +70°C and a storage temperature range of -30°C to +80°C, capable of handling complex high- and low-temperature conditions in industrial equipment and outdoor portable terminals. Utilizing the industry-proven and stable ST7789 driver IC, it integrates display, resistive touch, and backlight drive into one unit, making it a go-to display solution for embedded human-machine interfaces, small industrial control devices, and portable smart terminal development.
Resistive Touchscreen Key Product Highlights
- Integrated Resistive Touchscreen Solution: The module is shipped with the screen and resistive touch layer fully laminated and the touch communication traces consolidated into a unified 40-pin interface. This eliminates the need for customers to perform lamination, cable connection, or insulation protection processes. The Resistive Touchscreen supports precise single-point pressure activation and offers outstanding resistance to dust and oil contamination. It also operates stably with standard work gloves, making it ideally suited for harsh industrial working environments.
- Dual-Mode MCU Parallel Interface Compatibility: The hardware supports switchable 8Bit/16Bit data buses, compatible with a wide range of common embedded main controllers, including STM32, 51-series microcontrollers, and ARM industrial control boards. The same screen can be adapted to projects using different bit-width main controllers, reducing inventory variety and lowering procurement costs.
- Built-in Constant-Current Backlight Driver: No external backlight driver IC is required. Backlight on/off control is managed simply through the BL pin, reducing external component count, minimizing overall PCB area, and streamlining the product hardware design process.
- Industrial-Grade Wide-Temperature Durable Materials: The LCD panel, Resistive Touchscreen layer, and backlight components are all manufactured using industrial-grade materials. Screen refresh rates and touch sensitivity show no significant degradation under high and low temperature conditions, and the product offers a significantly longer operational lifespan compared to consumer-grade displays.
Detailed 40-Pin Function Description
This module utilizes a standard 40-pin, 2.54mm-pitch pin header.
Primary Product Application Scenarios
Leveraging the core characteristics of the Resistive Touchscreen—abrasion resistance, low cost, operability with gloves, and wide-temperature stability—combined with a compact 2.4-inch form factor and MCU parallel interface, this product serves a wide range of human-machine interface devices across multiple industries:
- Industrial Automation Equipment: Small industrial control panels, workshop data collection handheld detectors, pipeline pressure/temperature and humidity measurement instruments.
- Embedded Development: Microcontroller learning and development boards, DIY smart hardware prototypes, university teaching and training display modules.
- Portable Handheld Terminals: Portable temperature measurement devices, outdoor inspection recorders, compact handheld barcode scanning and interaction devices.
- Micro Smart Home Devices: Compact temperature control panels, smart home appliance operation displays, portable environmental monitors.
- Small Medical Devices: Portable pulse oximeters, home vision care devices, operating screens for small physiotherapy equipment.
Resistive Touchscreen Technical Q&A
Q1: Does the Resistive Touchscreen on this module support operation with gloves?
A: Yes. Resistive touch technology relies on pressure activation and is not limited by conductive materials. It allows for precise pressing operations even with standard rubber or cotton work gloves. This makes it far more suitable than capacitive touchscreens for scenarios requiring glove use, such as industrial workshops and outdoor inspections.
Q2: How do I switch between 8Bit and 16Bit MCU interfaces on the screen? Does it require additional hardware modifications?
A: No hardware modifications are needed. The switch is made by configuring the bus mode through the main controller’s firmware. The 16Bit mode offers faster color refresh rates, while the 8Bit mode is compatible with low-cost 8-bit microcontrollers. Developers can flexibly choose based on their project’s main controller.
Q3: Will the sensitivity of the Resistive Touchscreen degrade under high or low temperature conditions?
A: This product uses industrial-grade touch and LCD materials throughout. Touch response remains stable within the operating range of -20°C to +70°C. Only when approaching extreme storage temperatures may slight sensitivity degradation occur, but normal performance resumes upon return to room temperature.
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