Bluetooth Low Energy keyboard reference design


Design files


This solution implements a keyboard for any operation system which supports HOGP (Hid Over GATT Profile). It is designed to have ultra low-power consumption for a substantial time working with Bluetooth Low Energy technology. CC2541 and an ultra-low-power MSP MCU are used in this design to handle BLE stack, key-matrix scan and power management work.

  • Low-power, 3mW average when typing at about 300 characters per minute
  • Designed with TI Bluetooth Low Energy protocol stack include HOGP implementation
  • Full-feature keyboard support up to 128 keys(16 x 8 matrix) without pcb modification
  • Turnkey solution for BLE keyboard applications
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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.

TIDU548.PDF (2328 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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

TIDC719.ZIP (49 K)

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


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS62730Step Down Converter with Bypass Mode for Ultra Low Power Wireless Applications

Data sheet: PDF | HTML
Low-power 2.4-GHz products

CC2541Bluetooth® Low Energy and proprietary wireless MCU

Data sheet: PDF
MSP430 microcontrollers

MSP430G244416 MHz MCU with 8KB Flash, 512B SRAM, 10-bit ADC, UART/SPI/I2C, timer

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
Design guide Bluetooth Low-Energy Keyboard Reference Design Guide Sep. 19, 2014

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