The Most Flexible and Lowest Power Bluetooth® Low Energy Solution

The DA14581 integrated circuit is an optimized version of the DA14580, offering a reduced boot time and supporting up to 8 connections. It has a fully integrated radio transceiver and baseband processor for Bluetooth Low Energy. It can be used as a standalone application processor or as a data pump in hosted systems.

The DA14581 supports a flexible memory architecture for storing Bluetooth profiles and custom application code, which can be updated Over-the-Air (OTA). The qualified Bluetooth Low Energy protocol stack and the HCI-ready software are stored in a dedicated ROM. All software runs on the ARM® Cortex®-M0 processor via a simple scheduler.

The Bluetooth Low Energy firmware includes the L2CAP service layer protocols, Security Manager (SM), Attribute Protocol (ATT), the Generic Attribute Profile (GATT), and the Generic Access Profile (GAP). All profiles published by the Bluetooth SIG as well as custom profiles are supported. The transceiver interfaces directly to the antenna and is fully compliant with the Bluetooth 4.2 standard.

The DA14581 has dedicated hardware for the Link Layer implementation of Bluetooth Low Energy and interface controllers for enhanced connectivity capabilities.


  • Based on the same outstanding DA14580 SoC
  • Uses a dedicated ROM which offers optimizations targeting A4WP and HCI
  • Alliance for Wireless Power (A4WP)
    • Fast boot time for Power Receiving Unit (PRU)
    • 8 connections for Power Transmitting Unit (PTU)
  • Human Computer Interaction (HCI)
    • Optimized code for HCI which fits into the OTP
    • This enables customers/modules to provide a pre-programmed HCI device/module


  • WLCSP-34 (2.5mm x 2.5mm x 0.5mm)
  • QFN-40 (5.0mm x 5.0mm x 0.9mm)
  • Ultra-thin WLCSP-34 (2.436mm x 2.436mm x 0.334mm)


  • Bluetooth 4.2
  • Cortex-M0 application processor
  • Power supply 0.9V – 3.6V
  • Single pin RF I/O
  • Rich set of analog and digital peripherals
  • 8 connections
  • Optimized boot time
  • Supporting software upgrades Over-The-Air (OTA)




  • Wireless charging (A4WP)
  • HCI


Type Title Date
Datasheet PDF 3.26 MB
Manual - Development Tools
Manual - Software
Manual - Development Tools
Manual - Development Tools ZIP 92 KB
Materials Composition Declaration PDF 1.06 MB
Other ZIP 6.03 MB
Other PDF 404 KB
Manual - Development Tools PDF 2.06 MB
Manual - Development Tools PDF 2.36 MB
Other PDF 1002 KB
Application Note PDF 4.71 MB
Other PDF 580 KB
Other PDF 1.73 MB
Other PDF 42 KB
Manual - Development Tools PDF 6.97 MB
Manual - Development Tools PDF 10.02 MB
Manual - Software PDF 4.14 MB
Application Note PDF 683 KB
Manual - Development Tools PDF 2.44 MB 简体中文
Application Note PDF 769 KB
Application Note PDF 455 KB
Application Note PDF 1.17 MB
Manual - Development Tools PDF 617 KB 简体中文
Manual - Development Tools PDF 761 KB 简体中文
Manual - Development Tools PDF 988 KB 简体中文
Manual - Development Tools PDF 812 KB 简体中文
Application Note PDF 793 KB
Manual - Development Tools PDF 2.10 MB
Application Note PDF 411 KB
Application Note PDF 342 KB
Application Note PDF 353 KB
Application Note PDF 1.87 MB
Release Note PDF 594 KB
Manual - Development Tools PDF 1.05 MB
Manual - Development Tools PDF 1.19 MB
Application Note PDF 311 KB
Application Note PDF 169 KB
Application Note PDF 308 KB
Other PDF 81 KB
Product Brief PDF 2.82 MB 日本語 , 简体中文
Datasheet PDF 79 KB
47 items

Design & Development

Software & Tools

Software & Tools

Software title
Software type
SmartBond™ - CodeLess™ AT Commands
The SmartBond™ CodeLess AT Commands platform enables control of the Bluetooth® Low Energy connectivity, sensor read-out and battery check of the device.
IDE and Coding Tool Renesas
Serial Port Service (SPS)
The Serial Port Service (SPS) emulates serial cable communication.
Emulator Renesas
SmartBond™ Development Tools
SmartSnippets™ Studio is a royalty-free software development platform for SmartBond™ devices.
Software Package Renesas
3 items

Software Downloads

Type Title Date
Software & Tools - Other ZIP 1.71 MB
Software & Tools - Other ZIP 6.80 MB
Software & Tools - Other PDF 416 KB
Software & Tools - Other ZIP 4.91 MB
Software & Tools - Other ZIP 3.63 MB
Software & Tools - Other PDF 2.72 MB
Software & Tools - Software PDF 680 KB
Software & Tools - Other ZIP 13.11 MB
Software & Tools - Other ZIP 9 KB
9 items

Sample Code

Sample Code

Type Title Date Date
Sample Code ZIP 12 KB
1 item

Boards & Kits

Boards & Kits