Battery-less Near Field Communication (NFC) Keyboard
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This solution implements a batteryless keyboard using Near Field Communications (NFC) technology. The core part of this solution is TI’s dynamic NFC tag that can be read and written to by a host microcontroller. Mobile phones that support NFC can quickly discover and recognize this keyboard and then build a connection between the keyboard and application. This design is a battery-less system (i.e., does not require a battery to operate), which enables customers to build products with optimized dimensions (e.g., thin keyboards) and of lighter weight (e.g., easier to carry).

  • Battery-less solution
  • Standard PC/AT keyboard character set
  • More than 400 characters /min input capability
  • About 20 mW power consumption for both ultra-low-power MSP MCU and RF430CL330 tag
  • Low-cost PCB coil antenna for power harvesting
  • Android test tool and InputMethod application provided

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Schematic/Block Diagram

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Design Guide

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430FR5739  24 MHz MCU with 16KB FRAM, 1KB SRAM, 10-bit ADC , Comparator, UART/SPI/I2C, Timer  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
RF430CL330H  Dynamic Dual Interface NFC Transponder  Wireless connectivity  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
MSP430FR5739 Download -
Download Download
RF430CL330H Download Download
Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 5987 17 Jun 2014
Design files (3)
Title Type Size (KB) Date
ZIP 671 17 Jun 2014
PDF 28 17 Jun 2014
PDF 72 17 Jun 2014

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