2.1″ DIABLO16 TFT IPS Round LCD Intelligent Display

The uLCD-480RD-CTP-CLB is a unique 2.1″ Round, Capacitive Touch LCD Intelligent Display Module with Cover Lens Bezel. powered by the 4D Systems’ DIABLO-16 Graphics Processor.

The 2.1″ TFT IPS Round LCD on the uLCD-480RD has a diameter of 480 pixels, however since the display is round there are only ever 240 pixels from the center of the display, in any given direction. The pixels are in a round configuration instead of the normal square configuration found on other TFT LCD Displays.

Driving the display and peripherals is the DIABLO-16 processor, a very capable and powerful chip that enables stand-alone functionality, programmed using the 4D Systems Workshop4 IDE Software. The WorkshopIDE enables graphic solutions to be constructed rapidly and with ease due to its design being solely for 4D graphics processors.

The DIABLO-16 processor features include 16 customizable GPIO, capable of PWM, Serial, I2C, SPI, Pulse Out, Quadrature Input, and Analog Input.

The display module has an array of features including PWM for Sound, selectable micro-SD flash storage, or SPI Flash storage, general-purpose I/O including Analog Inputs, multiple TTL Serial, I2C and SPI channels, and multiple millisecond resolution timers, amongst many more features.

The uLCD-480RD features a 30-pin ZIF/FFC/FPC socket, designed for a 30-pin FPC cable, for easy and simple connection to an application or mother board, or for connecting to accessory boards for various functionality advancements. All of the IO available on the DIABLO-16 processor have been broken out for the User. It is compatible with the pinout found on the gen4-uLCD range of products and is programmed using the 4D-UPA Programmer – the same as the gen4-uLCD line.

Information about the display module

  • Powerful 2.1″ Intelligent LCD-TFT IPS display module powered by DIABLO-16.
  • 480 x 480 Resolution (Round), RGB 65K true-to-life colors with LED Backlight.
  • Capacitive Touch with Cover Lens Bezel.
  • 6 banks of 32750 bytes of Flash memory for User Application Code and Data
  • 32Kb of SRAM purely for the User.
  • 16 General Purpose I/O pins for user interfacing, which include 4 configurable Analog Inputs.
  • The GPIO is variously configurable for alternative functions such as:
    • 3x I2C channels available
    • 1x SPI dedicated for SD Card and 3x configurable SPI channels available
    • 1x dedicated and 3x configurable TTL Serial comm ports available
    • Up to 6 GPIO can be used as Pin Counters
    • Up to 6 GPIO for PWM (simple and Servo)
    • Up to 10 GPIO for Pulse Output
    • Up to 14, GPIO can be configured for Quadrature Encoder Inputs (2 channels)
  • 30-pin FPC connection, for all signals, power, communications, GPIO, and programming.
  • On-board micro-SD memory card connector for multimedia storage and data logging purposes.
  • On-board SPI Flash memory is selectable to use instead of the on-board micro-SD memory card.
  • DOS-compatible file access (FAT16 format) as well as low-level access to card memory.
  • A dedicated filtered PWM Audio pin driven by WAV files from a micro-SD card, and an external amplifier enable
    pin allows easy connection to an external amplifier for audio playback.
  • Display full-colour images, animations, icons, and video clips on chosen 4D Systems display.
  • Supports all available Windows fonts.
  • 4.0V to 6.0V range operation (single supply).
  • Module dimensions: 80.0 x 80.0 x 8.5mm
  • Weight ~ 32g.
  • Display Viewing Area: Round 53.28mm Diameter
  • RoHS & REACH Compliant.
  • CE Compliance pending.

The uLCD-480RD-CTP-CLB includes the following items:

  • uLCD-480R-CTP-CLB Intelligent TFT-LCD Module
  • gen4 Interface Module (gen4-IB)
  • 150mm 30-way FFC cable
  • Getting Started Manual available as a Download

Suppose you are a first-time user and just beginning your development. In that case, we strongly recommend purchasing a Starter Kit of this same model as it includes additional items that allow you to get started with your development immediately.

The Starter Kit part number is SK-480RD-CTP-CLB


Display Size (Inches)


Display Resolution

480 x 480 (Round)



Display Viewing Area (mm)

53.28 mm (Round)


500 cd/m2

Backlight LEDs

1×4 Dual Parallel

Touch Type

Non-Touch w/ Cover Lens Bezel

Viewing Angle

Standard Viewing Angle






6 banks of 32KB


3 x Channels


16 x GPIO

Serial Interfaces

1 x dedicated and 3 x configurable


3 channels available

8-bit Parallel Transfer


Serial Speed

300 to 2187500 baud

SD Card Slot

Yes – RAW or FAT16 Support. SPI Compatible microSD Cards Only

Supply Voltage

4.0V to 6.0V