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Round LCD TFT Module, 1.38", 220x220, 4DGL/Serial US$76.00

Round LCD TFT Module, 1.38\", 220x220, 4DGL/Serial

The µLCD-220RD is a unique 1.38-inch round 220×220-resolution intelligent display module designed for applications where a round display is preferable to a traditional rectangle — e.g. analog gauges or an animated face. Driving the display and its peripherals is the 4D DIABLO16 processor, a very capable and powerful chip that enables stand-alone functionality programmed in 4DGL using the 4D Systems Workshop4 IDE Software. The Workshop4 IDE enables graphic solutions to be constructed rapidly and with ease.

This display module has an array of features including PWM for sound, microSD memory storage, general-purpose I/O including Analog Inputs, multiple TTL Serial, I2C and SPI channels, Quadrature Input, Pulse Output, and multiple millisecond-resolution timers, among other features.

If you've previously used a PICASO-based intelligent display module from 4D, you should only need to make minor changes to your 4DGL code to get it to run on the DIABLO.

4DGL is a graphics-oriented language allowing you to write applications in high-level code with syntax similar to popular languages such as BASIC, C and Pascal. The 4DGL-Workshop4 IDE (editor, compiler and downloader) also features the ViSi-Genie, a drag-and-drop graphical interface that will create 4DGL code for you — all you need to do is place pre-made objects onto a simulated image of the display, size and set parameters to your liking, then a single click will generate the 4DGL code to make that object functional.

Using the Workshop IDE, the module also can be loaded with a Serial Application that transforms it into a Serial Slave to virtually any serial host.

The DIABLO16 processor on the display module also can be re-programmed with different ‘Personality Module Micro-Code’ (PmmC) files for updates and future proofing. The process of updating the PmmC firmware or downloading your 4DGL program code requires connection of a USB converter that uses the DTR signal to pulse the Reset line on the processor. Two converters that can plug directly into this module are available from the "Optional Recommended Products" list below.

Round TFT LCD Graphics Module Features

  • Powerful 1.38" intelligent LCD-TFT display module powered by the 4D-Labs DIABLO16 graphics processor
  • 220 × 220 resolution (round), 65K colors, TFT screen with LED backlight
  • Module dimensions: 42.4 × 46.9 × 14.1 mm
  • Active Display Area: 35.1 mm diameter
  • Weighs about 15 grams
  • Easy 5-pin interface to any TTL serial host device: VCC, TX, RX, GND, Reset
  • Six banks of 32750-byte Flash memory for user application code and data
  • 32Kb of user SRAM
  • 16 General-Purpose I/O pins for user interfaces, including four configurable Analog Inputs
  • On-board microSD memory card connector for multimedia storage and data logging purposes. Supports 64MB to 2GB microSD memory cards as well as microSDHC memory cards of 4GB and above (SPI-compatible microSD card required)
  • DOS-compatible file access (FAT16) as well as low-level access to card memory
  • Dedicated filtered PWM audio pin driven by WAV files from microSD card, with external amplifier Enable pin
  • Expansion headers for configurable GPIO (see Expansion Header section below)
  • Display full-color images, animations, icons and video clips
  • Supports all available Windows fonts and characters (imported as external fonts)
  • 4.0V to 5.5V range operation (single supply) *
  • RoHS and CE compliant
* The display must be powered by 4V to 5.5V via the programming header or the expansion header (minimum 5V for full backlight brightness). For example, you can connect the 4D Programming Cable to power the board from USB.

Included with the display module is a 150mm 5-pin Female-to-Female jumper cable for quick connection to another device or breadboard, and a 5-pin Male-to-Male pin adapter for that cable.

Expansion Header

GPIOs are available via Header H1, a 2.54mm-pitch IDC 2×15 male pin header.

The GPIOs are configurable for various alternative functions, such as:

  • 3x I2C channels available
  • 1x 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)

Four different usage methods

The 4D Systems Workshop4 IDE supports multiple development environments, to cater for different user requirements and skill levels.
  • The Designer environment enables you to write 4DGL code in its natural form to program the display module.
  • The ViSi visual programming experience enables drag-and-drop placement of objects to assist with 4DGL code generation and allows you to visualize how the display will look.
  • The ViSi-Genie advanced environment doesn't require any 4DGL coding at all; it is done automatically for you. Simply lay out the display with the objects you want (similar to ViSi), set the events to drive them and the code is written for you automatically.
  • The Serial environment is provided to transform the display module into a slave serial display module, allowing you to control the display from any host microcontroller or device with a serial port. Serial libraries are available for C, Pascal, PicAxe, and Arduino.

Round TFT LCD Graphics Module Resources

Optional Recommended Products for this Item
USB to Serial TTL Cable, 3.3V, 5-pin Female Header, 1.8m+ US$22.00
Arduino Adapter Shield II for 4D Systems LCD/OLED Displays+ US$18.61
Raspberry Pi Interface Adapter for 4D Systems LCD/OLED Displays+ US$14.10

This product was added to our catalog on Wednesday 03 September, 2014.


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USB to Serial TTL Cable, 3.3V, 5-pin Female Header, 1.8mUSB to Serial TTL Cable, 3.3V, 5-pin Female Header, 1.8mUS$22.00

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