4 Inch TFT LCD Display Panel 320x320 Square Type MCU & SPI Interface With CTP
This 4-inch 320*320 square TFT LCD display panel with capacitive touch screen (CTP) and SPI/microcontroller interface is an integrated display and touch control module designed for embedded systems. It offers excellent display clarity, responsive touch interaction, low power consumption, and easy development integration.
Product Specifications
| Parameter | Specification |
|---|
| Product | TFT 4″ Inch |
| Resolution | 320*320 Pixels |
| Interface | MCU SPI |
| Touch Screen | PCAP Capacitive Touch Screen |
| Lens Dimension | 84.0(W) * 84.0(H) * 3.37(T) mm |
| Viewing Direction | All Viewing Angles (85/85/85/85) |
| Pin Number | 40 Pins |
| Connection | Plugging |
| Surface Luminance | 300 Cd/m² |
| Supply Power | 3.3 V |
| Current Consumption | 20 mA |
| Operating Temperature | -20℃ to +70℃ |
| Life Time | 40000 Hrs |
| Compliance | REACH & RoHS Compliant |
External Dimensions
Interface Pin Definition
| Pin No. | Symbol | Description | When not in use |
|---|
| 1 | LEDA | B/L positive pin | -- |
| 2 | LEDK | B/L negative pin | -- |
| 3 | LEDK | B/L negative pin | -- |
| 4 | GND | Ground | -- |
| 5 | VCI | Power supply (2.8-3.3V) | -- |
| 6 | IOVCC | I/O power supply (1.8-3.3V) | -- |
| 7 | TE | Tearing effect output | Open |
| 8 | CS | Chip selection pin. Low-active. | -- |
| 9 | RS | Display data/command selection DCX='1': display data or parameter. DCX='0': register index / command. | -- |
| 10 | WR/SCK | Write enable in MCU interface. In SPI mode, this pin is SCK | -- |
| 11 | RD | Read enable | GND |
| 12 | SDI | SPI interface input/output pin. | -- |
| 13 | SDO | SPI interface output pin. | -- |
| 14 | GND | Ground | -- |
| 15-30 | D0-D15 | Horizontal sync input | GND |
| 31 | RESET | This signal will reset the device and it must be applied to properly initialize the chip | -- |
| 32 | IM2 | IM0=0 | IM2=0 | MCU 16 BIT | D[15:0] is used
IM0=1 | IM2=0 | MCU 8 BIT | D[7:0] is used | -- |
| 33 | IM0 | IM0=1 | IM2=1 | 4Line SPI | CS,RS,SCK,SDI
IM0=0 | IM2=1 | Reserve | - | -- |
| 34 | GND | Ground | -- |
| 35 | TP_INT | TP Interrupt to the host | Open |
| 36 | TP_SDA | TP I2C data input and output | Open |
| 37 | TP_SCL | TP I2C clock input | Open |
| 38 | TP_RES | TP external reset, Low is active | Open |
| 39 | TP_VCI | TP power supply (2.8-3.3V) | Open |
| 40 | GND | Ground | -- |
Product Features
- Square Screen Design: 320*320 square ratio ideal for symmetrical UI layouts on dashboards, control panels, and intelligent interfaces
- Dual Interface Compatibility: Supports both SPI (simplified wiring) and MCU parallel interfaces for high-speed refresh scenarios
- Integrated Touch Control: Seamlessly integrated CTP capacitive touch screen with precise multi-touch control and gesture support
- Wide Temperature Range: Industrial-grade operating temperature (-20℃ to +70℃) with anti-static protection for harsh environments
- Easy Development: Compatible with mainstream microcontrollers (STM32, Arduino, ESP32) with mature driver libraries and sample codes
- Compact Design: FPC flexible ribbon cable (40 pins) with thin profile (2.0-3.5mm) for space-constrained applications
Main Applications
Industrial Control and Instrumentation
Industrial HMI, PLC touch screens, sensor data displays, portable testers, oscilloscope/multimeter color screens, CNC equipment control panels
Smart Home and Internet of Things
Smart switch panels (86-box compatible), thermostats, HVAC controllers, gateway central control, security monitoring displays
Medical and Health Equipment
Portable detectors (blood glucose, ECG, blood oxygen), rehabilitation equipment, medical monitors, infusion pump displays
Vehicle and Transportation Electronics
Vehicle instruments, tire pressure monitoring, dashcam screens, electric vehicle central control, marine navigation terminals
Consumer and Portable Electronics
Smart speaker displays, educational devices, handheld game consoles, media players, outdoor equipment interfaces
Other Applications
Security access control, POS systems, smart locker displays, charging station interfaces, agricultural IoT monitoring terminals
Frequently Asked Questions
I want the LCD display 8 digits and the outline size is 65x30x2.8mm. Is this possible?
Yes, we can accommodate your requirements. Please send us your specifications or drawing. If you don't have specifications, you can provide samples and we'll recommend suitable options or customize based on your requirements.
This LCD is what we want, but the size is too big. Do you have smaller sizes? Can the display content be modified?
For segment type LCD modules, modifying outline size or display content requires a new LCD glass module with custom tooling.
This LCD display is HTN type, but I want STN type. Can you make it?
Yes, we can change the display type according to your requirements.
Can you customize a new LCD module?
Yes, we provide full customization services. Please send your drawing or provide specifications including outline size, display information, glass thickness, polarizer type, display type, connector mode, temperature ranges, supply voltage, viewing direction, and drive conditions.
What is the lead time for tooling?
Typically 15 to 25 days after drawing confirmation and tooling charge payment. We'll provide exact timing upon drawing approval.
Can you send samples for evaluation?
Yes, sample orders are available for testing and evaluation.
What is the production lead time?
For standard products in stock: 1 day after payment. For mass production of custom orders: approximately 15-30 days. We'll notify you if we can complete earlier.
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