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Arm IoT subsystem for Cortex-M processors with mbed OS is a complete reference system that reduces the complexity and risk of an SoC design for IoT endpoints. The Arm IoT subsystem for Cortex-M processors features a range of peripherals and interfaces; including links to TSMC s embedded flash memory. It is specifically designed for use with Cortex-M processors and optimized for mbedOS and Cordio Bluetooth Smart radio. It is possible to integrate other radios and wireless networking standards such as Wi-Fi and 802.15.4. The system has been designed to optimise power consumption and bring a high level of security: two key features for IoT solutions.


  • Low Power consumption
  • Flash consumes power when reading, but having a cache reduces the number of flash fetches. The IoT Subsystem for Cortex-M processors includes an integrated cache which allows up to 99% flash power consumption reduction.
  • Optimized for Arm Cortex-M Processors
  • The IoT subsystem for Cortex-M processors solution supports the successful Arm Cortex-M processors. The Cortex-M3 is an example processor that the IoT subsystem for Cortex-M processors is optimised for. This industry-leading 32-bit processor offers the performance and efficiency for the most demanding IoT applications. Arm Technology Enables and Simplifies IoT


  • The IoT subsystem for Cortex-M Processors provides RTL and a range of deliverables including integration scripts, example integration, and other information to describe how best to configure Arm s various IP components to target specific IoT devices.
  • The combination of Artisan physical IP and TSMC 55ULP process means the subsystem can run at sub-one volt operation, significantly extending battery life and making it easier to run a device using energy harvesting.

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