Azure RTOS is an embedded development suite including the small, but powerful ThreadX operating system that provides reliable, ultra-fast performance for resource-constrained devices. It’s easy-to-use and market-proven, having been deployed on more than 10 billion devices worldwide. Azure RTOS supports the Renesas RZ processor portfolio and most popular RZ embedded development tools.


  • Free production license for RZ Family of MPUs
  • Small footprint (Minimal 2KB)
  • Fast, deterministic performance (sub microsecond API calls and context switches)
  • Comprehensive set of middleware, including FileX, GUIX, NetX, NetX Duo, and USBX
  • Functional safety per-certified to IEC 61508 SIL 4, ISO 26262 ASIL D, IEC 62304 Class C
  • Advanced technology including SMP multicore support, preemption-threshold, event chaining
  • Seamless connectivity to Azure IoT
  • Easily leverage cloud services like Azure Defender, PnP, OTA



  • Industrial
  • Medical
  • Home Automation
  • Consumer


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PDF 186 KB Product Brief
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