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1 x ULCD-35DT   + US$0.00
Quantity Price
10 US$94.95
50 US$89.96
1 x UUSB-PA5-II   + US$0.00
Quantity Price
10 US$23.70
50 US$22.46
1 x uSD-4GB-Industrial   + US$0.00
Quantity Price
10 US$28.45
50 US$26.96
5 Pin Ribbon Cable   + US$0.00

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  • Starter Kit for Resistive-Touch 3.5" Intelligent LCD that includes everything needed to get started with development.
  • The Starter Kit is recommended for the first time users of the uLCD-35DT Display Module.
  • See product description below for more details.

3.5" Intelligent TFT-LCD Module with Picaso Graphics Controller

The uLCD-35DT is a 3.5", 480x320 high resolution Intelligent Display Module powered by the 4D Systems DIABLO16 Graphics Processor, and featuring a Resistive Touch display, on-board Audio Amplifier and a microSD card socket.

Driving the display and peripherals is the DIABLO16 processor, a very capable and powerful chip which enables stand-alone functionality, programmed using the 4D Systems Workshop 4 IDE Software. The Workshop IDE enables graphic solutions to be constructed rapidly and with ease due to its design being solely for 4D graphics processors.

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

Anything that has been designed in the past to run on a PICASO Processor can theoretically run on this DIABLO16 Module with minor changes. Please ensure you contact the 4D Systems support team if unsure if upgrading from a PICASO product and wanting to design with or change over to this uLCD-35DT Module.

Customisations to the module are possible by way of Wire-Loom connectors (shown at the bottom of the PCB) and alternate micro-SD connector, both subject to MOQ. Please refer to the Datasheet and contact the 4D Systems Sales Department.


Information about the display module

  • Powerful 3.5" Intelligent LCD-TFT display module powered by DIABLO16
  • 480x320 HVGA Resolution, RGB 65K true to life colours, TFT Screen with integrated 4-wire Resistive Touch Panel
  • Easy 5 pin interface to any TTL Serial Host: VCC, TX, RX, GND, RESET
  • 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 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)
  • On-board micro-SD memory card connector for multimedia storage and data logging purposes. HC memory card support is also available for cards larger than 4GB. An SPI Compatible micro-SD card is required
  • Alternative micro-SD memory card connector is available on special orders
  • DOS compatible file access (FAT16 format) as well as low level access to card memory
  • Dedicated raw PWM Audio pin driven by WAV files from micro-SD card
  • Display full colour images, animations, icons and video clips on chosen 4D Systems display
  • Supports all available Windows fonts
  • 4.0V to 5.5V range operation (single supply)
  • Module dimensions: 57 x 85.2 x 15.8mm (including corner plates)
  • Weight ~50 g.
  • Display Viewing Area: 49.7 x 77.0mm
  • 4x corner plates with 2.6mm holes for mechanical mounting
  • RoHS Compliant
  • CE Compliant

The SK-35DT includes the following items: 

  • uLCD-35DT Intelligent Display Module

  • uUSB-PA5-II Programming Adaptor

  • 4GB Industrial microSD Card

  • 5-way female-to-female ribbon cable with male-to-male adaptor

Workshop4 is a comprehensive software IDE for Microsoft Windows that provides an integrated software development platform for all of the 4D family of processors and modules. The IDE combines the Editor, Compiler, Linker and Downloader to develop complete 4DGL application code.
All user application code is developed within the Workshop4 IDE.

Download Workshop4

Workshop4 includes four development environments for the user to choose based on application requirements or even user skill level.

  • Designer

    This environment enables the user to write 4DGL code in its natural form to program the display module.

  • ViSi - Genie

    An advanced environment that does not require any 4DGL coding at all. Everything is done automatically for you. Simply lay the display out with the objects you want (similar to ViSi), set the events to drive them and the code is written for you automatically. ViSi-Genie provides the latest rapid development experience from 4D Systems.

  • ViSi

    A visual programming experience that enables drag-and-drop type placement of objects to assist with 4DGL code generation and allows the user to visualise how the display will look while being developed.

  • Serial

    This environment is also provided to transform the display module into a slave serial display module. It allows the user to control the display from any host microcontroller or device with a serial port.


Smart Widgets Editor is a powerful utility which enables the generation of Smart Widgets.

  • Users can create complex widgets with up to six layers, including the layer for the base image. The order of the layers can be arranged as desired.
  • Each layer can contain one or more images arranged in sequence that can be manipulated in a variety of ways. Image manipulation options include horizontal motion, vertical motion, and angular motion. Additionally, the transparency of a layer can be set.
  • Two or more layers can be linked to produce synchronized movements of images. This enables the generation of complex widgets with multiple moving parts. Clockwork feature is also supported. This enables users to quickly generate clock widgets.
  • Each layer can have a numeric part which can display numbers in various fonts and formats. Alternatively, the numeric part can be a fixed sequence of text.
  • The output frames can be utilized using any of the supported Workshop4 environments


Genie Magic is an extension to ViSi-Genie, which is available in Workshop4 PRO. Genie Magic allows the User to add 4DGL code to various points in the ViSi-Genie backend code, which allows Users to take full advantage of the power of 4DGL, while retaining the speed and convenience of ViSi-Genie and its defined communication protocol.

Genie Magic allows you to enter 4DGL code in the form of Events, Code and Objects, along with various touch related additions too, giving you to the power to achieve advanced GUI's in ViSi-Genie without having to write the full code yourself.

Genie Magic is fully supported by the genieArduino and geniePi libraries, making communication with an Arduino or Raspberry Pi host even more powerful.

When using Genie Magic in combination with the Smart Widget Editor, it is possible to use the Smart Widgets Editor tool and Smart Widgets to create other graphical user interface elements such as:

  • Dropdown Menu
  • Side Menu
  • 'Carousel Slider'
  • List Box
  • Quarter-Rotary Menu
  • Dock Menu
  • Fading Slide-To-Unlock Button
  • Spectrum With Transparency
  • And Many Others
8.4 MB |
Rev. 1.03
3.5 MB |
Rev. 1.7
2.5 MB |
Rev. 1.03a
2.6 MB |
Rev. 1.0
Software Tools
Product Page
Diablo16 Processor Documentation
STEP Models
3.3 MB |
Rev. 1.03b
26.5 MB |
Rev 1.03b (designed for CAD not simple STEP viewer)
Related Documents
Tutorials & Instruction