STM32WBA6: the leading single-chip solution for Matter and Bluetooth® LE applications

The STM32WBA6 is the most advanced microcontroller in the STM32WBA  series, designed to empower developers building next-gen wireless IoT devices. Combining high performance, flexible connectivity, and robust security, the MCUs offer the following high-end features:

• Up to 2 Mbytes of flash memory and 512 Kbytes of RAM.
• Up to 86 GPIOs and USB OTG high-speed support for advanced connectivity.
• Design flexibility with a wide range of package options.
• QFN48 pin to pin compatibility for upgrades from STM32WBA55.

How STM32WBA6 makes a difference in your projects

• Smart locks:
  • Leverage 2 Mbytes of flash for flexible key management and secure data storage.
  • Support dual-bank firmware architecture to enable seamless OTA updates without downtime.
  • Simplify hardware design and reduce bill of materials (BOM) costs with the integrated radio, accelerating time to market.
  • Deliver an enhanced user experience through reliable and secure wireless connectivity.

• Smart home Matter and Thread end devices:
  • Quickly implement the Matter standard with the certified X-Cube-Matter software package.
  • Leverage ample memory (2 Mbytes flash, 512 Kbytes RAM) to support robust OTA updates and advanced features.
  • Ensure reliable wireless connectivity in complex environments with high output power (+10 dBm).

• Medical devices (continuous glucose monitoring and remote monitoring):
  • Design compact, wearable devices using tiny package options without compromising performance.
  • Use large flash memory for extensive data logging and secure firmware updates.
  • Extend battery life with ultra-low-power wireless connectivity while maintaining robust signal strength.

The three main features of this MCU series are:

• Ultra-low power consumption for battery-operated devices.
• Robust security (SESIP Level 3, Arm PSA Level 3, RED compliance).
• Multiprotocol support (Bluetooth® LE 6.0, Thread, Zigbee, Matter) and flexible packaging options.
  
  

STM32WBA6x block diagram

 
Additional resources

• STM32WBA6 reference manual: RM0515
• STM32WBA6 datasheet: ​DS14736
• STM32WBA6 errata sheet: ES0644 ​
• Dedicated Wiki pages:
  • https://wiki.st.com/stm32mcu/wiki/Category:STM32WBA_Series
  • https://wiki.st.com/stm32mcu/wiki/Connectivity:Introduction_to_Bluetooth_LE_Audio
    
    
• STM32WBA6 dedicated application notes:
  • AN5929​: STM32Cube MCU package examples for STM32WBA series
  • AN5928​: how to build a short-range wireless application with STM32WBA MCUs
  • AN6159: migrating from the STM32WBA5xxx to the STM32WBA6xxx MCUs
    
    
• Hardware boards:
  • Nucleo board: NUCLEO-WBA65RI
    • DB4872: NUCLEO-WBA52CG NUCLEO-WBA55CG NUCLEO-WBA65RI Data brief
    • UM3448: STM32WBA Nucleo-64 board (MB1801 and MB2130)
      
      
  • Discovery kit: STM32WBA65I-DK1
    • DB5465: STM32WBA65I-DK1 Data brief
    • UM3462: Discovery kit with STM32WBA65RI MCU
      
      
  • ST Bluetooth® LE smartphone apps:
    • STBLESensor
    • STBLEToolbox
      
      
• Web Bluetooth App ST Web Bluetooth App Interfaces
• More resources are available on product webpage: STM32WBA series
  
  

For a detailed technical comparison of STM32WBA6 and STM32WBA5 peripheral compatibility and new features available on STM32WBA6, refer to the attached PDF.

First published on Nov 06, 2025