TIDA-00494

Touch Through Glass with Sharp ® LCD Reference Design

TIDA-00494

Design files

Overview

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. TIDA-00494 offers an HMI design 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 reference 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).

Features

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

Industrial

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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

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Design guide — TIDA-00494

TIDUBZ4B.PDF (4631 K)

Reference design overview and verified performance test data

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Schematic — TIDA-00494

TIDRMG4.PDF (327 K)

Detailed schematic diagram for design layout and components

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Bill of materials (BOM) — TIDA-00494

TIDRMG5.PDF (70 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

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Assembly drawing — TIDA-00494

TIDRMG6.PDF (179 K)

Detailed overview of design layout for component placement

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CAD/CAE symbol — TIDA-00494

TIDRMG8.ZIP (537 K)

Files used for 3D models or 2D drawings of IC components

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Gerber file — TIDA-00494

TIDCCC3.ZIP (255 K)

Design file that contains information on physical board layer of design PCB

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PCB layout — TIDA-00494

TIDRMG7.PDF (709 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

MSP430 microcontrollers

MSP430FR2633 — Capacitive Touch MCU with 16 touch IO (64 sensors), 16KB FRAM, 4KB SRAM, 19 IO, 10-bit ADC

Data sheet: PDF | HTML

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Software

Support software

TIDCCF8 — TIDA-00494 Software

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TIDCCF8 — TIDA-00494 Software

Latest version

Version: 01.00.00.00

Release date: 07 Jul 2016

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TIDA-00494 Software (zip) — 1326 K

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Technical documentation

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	Type	Title		Date
*	Design guide	Touch Through Glass With Sharp® LCD Design Guide (Rev. B)		May 29, 2019
	Technical article	Selecting an airtight approach to water and dust proof buttons	PDF \| HTML	Jul. 19, 2018
	Technical article	Engineering magic: Touch through thick glass with LEDs and LCD	PDF \| HTML	Aug. 18, 2016