Low Power Capacitive Touch Solution Human Machine Interface (HMI) Apps Reference Design
TIDM-LPBP-CAPTOUCH
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MSP MCUs featuring CapTIvate™ technology are the newest generation of capacitive touch solutions from TI. These MCUs are the lowest power capacitive touch microcontrollers in the world and the first to feature an IEC61000-4-6 certified solution. Get started with the MSP CapTIvate MCU Development Kit and TI Design reference designs for a thermostat user interface and 64-button capacitive touch implementation.

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Description

This TI Design demonstrates an ultra-low power implementation of capacitive touch inputs for various human machine interface (HMI) requirements in consumer, industrial & other applications. This solution leverages unique features available in the MSP430 Value Line microcontroller that enables developers to interface capacitive touch elements directly to a microcontroller I/O pin without the need for external, or additional passive components. The Capacitive Touch BoosterPack features several capacitive touch elements including a scroll wheel, button, and proximity sensors. When paired with the MSP430 LaunchPad this combination provides a complete hardware and software reference design to enable developers to quickly and easily replace any physical button with a capacitive touch element. This combination provides a cost effective solution for adding capacitive touch to consumer electronics, point of sales machines, and devices that have a physical button.

Features
  • Capacitive touch elements:
    • Scroll Wheel
    • Button
    • Proximity Sensor
  • 9 on-board LEDs for instant feedback
  • Timer-based UART communication enables interface to PC
  • Open source GUI
  • Fully supported by the MSP430 Capacitive Touch Sense Library"

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Schematic/Block Diagram

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Design Files

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430G2452  16 MHz MCU with 8KB FLASH, 256B SRAM, 10-bit ADC, Comparator, Timer, SPI/I2C  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
MSP430G2553  16 MHz MCU with 16KB FLASH, 512B SRAM, 10-bit ADC, Comparator, UART/SPI/I2C, Timer  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPD2E001  Low-capacitance 2-channel +/-15k-V ESD protection array for high-speed data interfaces  Circuit protection ICs  Sample & Buy View Design Kits & Evaluation Modules
TPS773  250-mA, 10-V, low-dropout voltage regulator with RESET with delay  Power management  Sample & Buy Not Available
TUSB3410  UART, I2C & IrDA serial port to USB bridge  USB ICs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
MSP430G2452 Download Download
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MSP430G2553 Download
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TPD2E001 Download -
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TPS773 Download Download
TUSB3410 Download Download
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Technical documentation

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User guides (2)
Title Type Size (KB) Date
PDF 547 20 Aug 2015
PDF 3972 30 Apr 2013
Design files (3)
Title Type Size (KB) Date
PDF 42 27 May 2014
ZIP 156 27 May 2014
PDF 130 27 May 2014

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