1.3 inch Round LCD Display 240×240 GC9A01 SPI

I. Product Detailed Introduction

The TFT-H013A6QQIGC4C10 is a 1.3-inch round TFT LCD display module that integrates a capacitive touch panel into a high-performance display solution. With 240×240 pixel resolution, this Round LCD Display adopts a normally black mode and 60% NTSC color gamut, delivering vivid colors, high contrast, and full viewing angle performance. The module is built around the GC9A01 driver IC, with the TFT section supporting an efficient 4-wire 8-bit SPI serial interface. The touch function is managed by the mainstream CST816T controller, which communicates via IIC for precise and smooth touch interaction.

Operating at a stable voltage of 3.0±0.3V (with backlight current tested at 40mA), this Round LCD Display achieves a brightness of 400±100 cd/m². It offers excellent environmental resilience, with an operating temperature range of -20°C to 70°C and a storage range of -30°C to 80°C. Its sleek and slim mechanical design makes it an ideal choice for compact wearable devices such as smartwatches, smart home control knobs, automotive dashboards, and various portable industrial instruments.

II. Core Product Highlights

• Native Round Aesthetic Design: Unlike traditional square-cut displays, this Round LCD Display features a perfectly circular shape from glass to backlight, seamlessly matching the streamlined contours of modern smart devices.
• Full-Angle Wide-Temperature Operation: The advanced normally black panel delivers near full-viewing-angle performance with minimal color shift. With an operating range of -20°C to +70°C and storage from -30°C to +80°C, this Round LCD Display handles harsh outdoor and industrial environments with ease.
• Minimal I/O Pin Footprint: The TFT and touch layers communicate via 4-wire SPI and IIC interfaces respectively, significantly reducing MCU/CPU pin usage and simplifying PCB layout design.
• Ultra-Slim High-Integration Structure: The combined CTP+TFT thickness is approximately 3.15±0.4mm, with a 0.30mm thin PI-reinforced FPC contact area, making this Round LCD Display physically compatible with miniature wearable electronics where space is extremely constrained.

III. Interface and Pin Assignment

For rapid hardware prototyping and system debugging, the module provides clearly separated pin zones for the TFT display and CTP touch controller:

TFT Display Pins (TFT Pin Signal – 10 pins total)：

CTP Touch Pins (CTP Pin Signal – 6 pins total)：

IV. Industry and Product Applications

Thanks to its distinctive round shape, this 1.3-inch Round LCD Display is widely adopted in hardware scenarios that demand a tech-forward, refined aesthetic and intuitive interaction:

• Smart Wearables: Serves as the core display for smartwatches, outdoor sports watches, and health monitoring bands, perfectly rendering circular watch faces, heart rate curves, and step count UIs.
• Smart Home Multifunction Knob Screens: Extensively used in high-end built-in microwaves, smart washing machines, air purifiers, and thermostat control panels, enabling dual touch-and-rotary interaction.
• Two-Wheel Mobility Smart Dashboards and Electronic Rearview Mirrors: Applied in premium e-bikes, smart scooters, and urban light motorcycles for handlebar-mounted instrument clusters. These dynamically show real-time speed, battery percentage, and Bluetooth navigation arrows. With constant high-frequency data updates during riding, this Round LCD Display effectively avoids image retention risks commonly associated with normally black panels.

V. Technical Q&A

Q1: What is the main driver IC for this Round LCD Display, and what software libraries are supported during development?

A1: This 1.3-inch Round LCD Display is powered by the well-established GC9A01 display driver IC and the CST816T capacitive touch controller. This combination enjoys strong popularity in both open-source and industrial development ecosystems. Developers can easily work with Arduino IDE, ESP-IDF, STM32 HAL libraries, and Raspberry Pi platforms, directly leveraging mainstream graphics libraries such as LVGL, Adafruit_GFX, LovyanGFX, or TFT_eSPI. These libraries natively include built-in cropping and coordinate mapping algorithms for the 240×240 circular viewport of the GC9A01, enabling out-of-the-box usability.

Q2: What is the supply voltage for the module? Can it be powered directly from a microcontroller’s 5V pin?

A2: Absolutely not – voltage regulation is mandatory. The datasheet clearly specifies that both the LCD driving voltage and the touch controller supply voltage for this Round LCD Display are rated at 3.0±0.3V. Applying 5V directly will instantly damage the main controller ICs. During hardware design, be sure to place a high-efficiency low-dropout linear regulator on the main board, and perform level shifting on the SPI signal lines if the microcontroller uses 5V logic, to ensure long-term reliable operation of the module within a safe voltage range.