Touch Through Glass with Sharp ® LCD Reference Design


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Key Document


Human machine interface (HMI) is an essential part of process plants because it is one of the major ways through which humans and machines interact.  The TIDA-00494 reference design offers an HMI solution for harsh and hazardous area applications. In process plants, operators are required to interact with keypads for programming functions, encapsulated in explosive proof screw-on metallic enclosures with thick glass windows for local readouts through a liquid-crystal display (LCD).

This TI Design uses MSP430™ microcontrollers (MCUs) with TI CapTIvate™ technology which allows the operator to interact with the keypad without needing to open the enclosure, saving time by avoiding work permit or plant shutdown. The operator can read results from a LCD and get notified with a light-emitting diode (LED) with only one integrated circuit (IC).


  • Single and multistep button touch
  • Four robust buttons option implemented
  • Finger detection through 10mm thick glass
  • Four LEDs and ultra-low power LCD as feedback
  • Work with gloves and in harsh environment(water, oil, dust, etc)
  • Temperature Range: -40°C to 85°C

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Schematic/Block Diagram

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Design Files

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Bill of Materials (BOM)

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430FR2633  MSP430 MCU with CapTIvate technology - the lowest power, most noise-immune capacitive touch  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
MSP430FR2633 Download -
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 2350 01 Sep 2016 30
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 255 22 Jun 2016 10
ZIP 537 22 Jun 2016 8
PDF 709 22 Jun 2016 5
PDF 179 22 Jun 2016 3
PDF 70 22 Jun 2016 7
PDF 327 22 Jun 2016 32
More literature (1)
Title Abstract Type Size (KB) Date Views
PDF 65 14 Jun 2017 10,193
Related Tools & Software

Reference Designs  ( 1 )

Name Part Number Tool Type
Low-Power Touch Through Glass Reference Design  TIDA-00343  TI Designs

Design Kits & Evaluation Modules  ( 2 )

Name Part Number Tool Type
MSP CapTIvate MCU Development Kit  MSP-CAPT-FR2633  Evaluation Modules & Boards 
Sharp ® Memory LCD BoosterPack  430BOOST-SHARP96  Evaluation Modules & Boards 

Software (2)

Name Part Number Software Type
CapTIvate™ Design Center GUI for MSP430™ Capacitive Sensing MCUs  MSPCAPTDSNCTR  Software Libraries 

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