Battery-less Near Field Communication (NFC) Keyboard


Design files


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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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.

TIDC471.ZIP (671 K)

Detailed schematic diagram for design layout and components

TIDR746.PDF (72 K)

Detailed schematic diagram for design layout and components

TIDR747.PDF (28 K)

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


Includes TI products in the design and potential alternatives.

MSP430 microcontrollers

MSP430FR573924 MHz MCU with 16KB FRAM, 1KB SRAM, 10-bit ADC , comparator, UART/SPI/I2C, timer

Data sheet: PDF | HTML
Other wireless products

RF430CL330HDynamic Dual Interface NFC Transponder

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
User guide Batteryless Near Field Communication (NFC) Keyboard User's Guide Jun. 17, 2014

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