1.54 Inch 240x240 SPI TFT LCD Display Module (ST7789 Driver)

Product Overview

The 1.54 Inch 240x240 SPI TFT Color LCD Display Module is a high-density, full-color graphic display engineered specifically for embedded hardware projects, wearable electronics, and compact human-machine interfaces (HMI). Driven by the high-performance Sitronix ST7789 single-chip controller, this display panel renders ultra-sharp graphics and 65K rich RGB colors across a compact 27.72mm x 27.72mm active viewing area. Utilizing In-Plane Switching (IPS) panel technology, it delivers wide viewing angles and vivid color reproduction without image distortion or grayscale inversion, even when viewed off-axis. With a high pixel density of approximately 220 PPI (pixels per inch), it provides crisp text rendering and sharp icon detail for space-constrained microcontroller applications.

Technical Architecture and Interface Specifications

Operating primarily via a 4-wire Serial Peripheral Interface (SPI), this module significantly reduces host microcontroller pin requirements by utilizing dedicated Data/Command (DC), Chip Select (CS), Serial Clock (SCL/SCK), and Master-Out Slave-In (SDA/MOSI) lines, alongside hardware Reset (RES) and Backlight (BLK) control. The board includes an onboard low-dropout (LDO) voltage regulator supporting supply voltage inputs from 3.3V to 5.0V, with native 3.3V logic level compatibility. Capable of high-speed SPI clock frequencies up to 60 MHz, the integrated ST7789 display driver facilitates fast frame refresh rates essential for real-time sensor graphing, dynamic UI menus, and smooth animations. The module integrates seamlessly with open-source graphics frameworks such as TFT_eSPI, Adafruit GFX, LVGL (Light and Versatile Graphics Library), and U8g2.

Hardware Integration and Application Scope

Designed for versatile deployment, this display module features standard 2.54mm pitch header connections for rapid breadboard prototyping and custom PCB mounting. Its low operating current and ultra-thin footprint make it an ideal choice for compact diagnostic equipment, biometric smartwatches, handheld test meters, IoT smart home nodes, and custom automotive digital gauges. The module offers native pin compatibility with mainstream development ecosystems including ESP32, STM32, RP2040, Arduino, and Raspberry Pi platforms.

Main Features

• Resolution: 240 x 240 RGB pixels
• Display Technology: IPS (In-Plane Switching) with full viewing angle performance
• Driver IC: Sitronix ST7789 / ST7789V
• Communication Interface: 4-wire Serial Peripheral Interface (SPI)
• Color Depth: 16-bit RGB565 (65,536 colors)
• Operating Voltage: 3.3V to 5.0V DC (onboard LDO regulator)
• Logic Voltage: 3.3V TTL compatible
• Backlight Control: Integrated LED backlight with optional PWM dimming via BLK pin
• Hardware Compatibility: ESP32, STM32, RP2040, Arduino, Raspberry Pi, and MSP430

Pin Configuration and Signal Description

• VCC: Power Supply Input (3.3V to 5.0V DC)
• GND: Power Ground
• SCL / SCK: SPI Serial Clock signal
• SDA / MOSI: SPI Serial Data Input
• RES / RST: Hardware Reset signal (active low)
• DC / A0: Data/Command selection pin (High = Data, Low = Command)
• CS: SPI Chip Select pin (active low)
• BLK / BL: Backlight Control pin (Connect to 3.3V or PWM signal for dimming control)