MSP430FR2633 Microcontroller CapTIvate Electronic Lock and Keypad Reference Design
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Key Document


This reference design demonstrates an ultra-low-power capacitive touch panel solution based on a single MSP430™ microcontroller (MCU) with CapTIvate™ technology. The use of self and mutual capacitance technology enables multifunctional capacitive touch panels (buttons, and proximity sensor) for eLocks and other applications with various human interfaces available. This TI Design also demonstrates how to extend battery life by duty-cycling the MSP430 CPU and switch between low-power mode and active mode.

  • 12 touch buttons with one proximity sensor for system wake up and guard key
  • 12 LEDs to indicate touch operation
  • Haptics and beep available for touch feedback and lock status
  • Ultra-low standby power consumption
  • Anti-moisture performance

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Design Guide

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430FR2633  Capacitive Touch MCU with 16 touch IO (64 sensors), 16KB FRAM, 4KB SRAM, 19 IO, 10-bit ADC  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
TPS61020  Adjustable, 1.5-A Switch, 96% Efficient Boost Converter with Down-Mode, QFN-10  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS62745  3.3V-10V input, 300mA Ultra Low Iq step-down converter with VSEL and input voltage switch  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
MSP430FR2633 Download -
Download -
Download Download
TPS61020 Download Download
TPS62745 Download Download

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Technical documentation

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More literature (1)
Title Date Type
CapTIvate Technology Guide 19 Jul 2016
User guide (1)
Title Type Size (KB) Date
PDF 6231 07 Nov 2016
White paper (2)
Title Type Size (KB) Date
PDF 840 12 Nov 2019
PDF 1156 14 Oct 2015
Design files (6)
Title Type Size (KB) Date
ZIP 206 28 Oct 2016
ZIP 549 28 Oct 2016
ZIP 256 28 Oct 2016
PDF 35 28 Oct 2016
PDF 99 28 Oct 2016
PDF 460 28 Oct 2016
Related Tools & Software

Reference Designs (3)

Name Part Number Tool Type
64-Button Capacitive Touch Panel With TI Microcontroller With CapTIvate Technology Reference Design  TIDM-CAPTIVATE-64-BUTTON  Reference design 
Capacitive Touch Thermostat UI with MSP MCUs Featuring CapTIvate Technology Reference Design  TIDM-CAPTIVATE-THERMOSTAT-UI  Reference design 
Noise Tolerant Capacitive Touch HMI Reference Design  TIDM-CAPTOUCHEMCREF  Reference design 

Software development (2)

Name Part Number Software Type
CapTIvate™ Design Center GUI for MSP430™ Capacitive Sensing MCUs  MSPCAPTDSNCTR  Application software & framework 

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