Chip vs Chip

nRF54H20 vs STM32WB55

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Side-by-side comparison of nRF54H20 and STM32WB55 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

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nRF54H20

      

      

    
    
      

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STM32WB55

      

      

    
  

  

  
  

  






  
  

    
nRF54H20 vs STM32WB55


Overview


The Nordic Semiconductor nRF54H20 and the STMicroelectronics STM32WB55 both occupy the premium tier of the BLE SoC market, but they approach it from very different strategic angles. The STM32WB55 is ST's dual-core wireless SoC featuring a Cortex-M4F application core alongside a dedicated Cortex-M0+ radio and security processor — deeply integrated into the broad STM32 ecosystem with 1 MB Flash, BLE 5.2, optional Thread support, and access to the vast STM32CubeWB middleware suite used by tens of millions of STM32 engineers worldwide. The nRF54H20 is Nordic's flagship multi-core BLE 5.4 SoC targeting the highest performance tier with advanced BLE features, a dedicated security core, and the most capable BLE 5.4 implementation in the Nordic lineup.


The STM32WB55 is the natural choice for teams with existing STM32 platform investment. The nRF54H20 targets teams prioritizing leading BLE 5.4 capabilities and Nordic's proven BLE stack quality.




Key Differences


    

  • STM32 ecosystem depth: The STM32WB55 runs STM32CubeWB middleware and benefits from the enormous STM32 ecosystem — Cube HAL libraries, STM32CubeMX graphical code generation, extensive peripheral reference designs, and ST's large global FAE support network. Engineers with STM32 experience have an immediate productivity advantage with the WB55.
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  • Dual-core design: The STM32WB55 uses a Cortex-M4F at 64 MHz for application code and a Cortex-M0+ that runs the wireless stack independently — cleanly isolating application and radio concerns at the processor level. The nRF54H20 uses a more sophisticated heterogeneous multi-core design with dedicated security processing as a third domain.
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  • BLE specification: The nRF54H20 supports BLE 5.4 with LC3 codec and Auracast." data-category="LE Audio">LE Audio, Isochronous Channels, Auracast broadcasting, and enhanced Advertising">direction finding. The STM32WB55 supports BLE 5.2 — fully capable for most production deployments but without BLE 5.4 and LE Audio.
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  • OTA update architecture: The STM32WB55 supports over-the-air firmware updates for both the application core and the wireless stack independently. Independent wireless stack updates without touching application firmware is a meaningful operational advantage for deployed products needing radio stack security patches separately from application patches.
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  • Thread and Matter: The STM32WB55 supports IEEE 802.15.4 for OpenThread alongside BLE, making it viable for Matter over Thread endpoint devices. The nRF54H20 is BLE-focused without Thread.
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  • Flash: The STM32WB55's 1 MB Flash is generous for combined BLE stack and application firmware, accommodating OTA images for both cores simultaneously.
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  • Security: The nRF54H20 features TrustZone and a dedicated security core with hardware attestation capabilities. The STM32WB55 has a dedicated M0+ security processor and hardware crypto blocks, providing strong but differently architected security.
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  • Price: Both chips sit in similar premium price brackets, with the STM32WB55 somewhat more accessible in standard distributor channels at typical engineering volume tiers.
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Use Cases


nRF54H20 is the right choice for:
- BLE 5.4 products requiring LE Audio, Isochronous Channels, Auracast, or enhanced BLE direction finding
- Applications prioritizing multi-core processing performance and advanced security architecture
- Teams not tied to the STM32 ecosystem seeking the latest BLE feature generation
- Medical wearables and professional IoT devices requiring maximum BLE protocol capability


STM32WB55 is the right choice for:
- Teams with existing STM32 firmware portfolios and STM32 peripheral driver expertise seeking to add wireless
- Products requiring simultaneous BLE and Thread for Matter over Thread deployments
- Industrial devices leveraging STM32's extensive high-quality analog peripheral set alongside wireless connectivity
- Applications where STM32CubeMX graphical code generation and ST's FAE support network provide substantial productivity benefits




Verdict


The STM32WB55 is an excellent choice for teams already invested in the STM32 ecosystem — the productivity benefits of familiar tools, STM32CubeMX code generation, and ST's support network are real and quantifiable in engineering time. Its BLE 5.2 plus Thread capability also makes it viable for Matter over Thread deployments. The nRF54H20 is the superior BLE chip in terms of specification generation (5.4 versus 5.2), processing architecture, LE Audio support, and overall BLE stack quality — and is the right choice for teams building BLE-first products without STM32 constraints. Ecosystem fit often drives this decision more than the raw chip specifications themselves.

  

  

  
  

  
  

    




  
Frequently Asked Questions


  

    
    

      
      

        
Our comparisons use verified datasheet specifications to create side-by-side tables. Each comparison includes a verdict explaining when to choose each option based on your project requirements.