Reference Package Optimized for Arm Cortex-M55 Based Devices

Architected to maximize the performance of IoT and embedded devices, the Corstone-300 is a reference package based on the Arm Cortex-M55 processor and developed to help SoC designers build secure systems faster. The Corstone-300 can also easily integrate the Ethos-U55, the industry’s first microNPU.

Features and Benefits

Accelerate Time to Market

The fastest way to incorporate Arm’s most AI-capable Cortex-M processor, the Arm Cortex-M55, into an SoC design. Optimize energy efficiency quickly with advanced power management features and spend more time on differentiation.

Simplify Security Implementation

Simplifies chip-level security with an optimized AMBA AXI5 system for Arm TrustZone technology, accelerating the route to PSA Certified silicon and devices.

Reduce Risk and Costs

Simplify software development with open-source Trusted Firmware-M (TF-M) and popular RTOSes.


The Corstone-300 includes a number of system IP blocks that provide the perfect starting point for SoC design. Explore the components of Corstone-300 below.

Software and Tools

Arm and partners offer software and tools that run on Corstone designs to help simplify and accelerate SoC development. 

Virtual Hardware

Arm Virtual Hardware delivers accurate models of Arm-based SoCs, such as Corstone-300 for application developers to build and test software without hardware, accelerating IoT and ML development.

Trusted Firmware-M

Provides open-source reference specifications, documents, and reference firmware for Armv8-M based microcontrollers. 

RTOS Support

Choose from well-supported RTOSes, such as RTX, FreeRTOS, Zephyr and Mbed OS to reduce software development cost.

Development Toolchain

Arm Development Studio, featuring Keil MDK, is optimized for Arm-based microcontrollers and includes all the components required to create, build, and debug embedded applications. Keil MDK comprises various components, including Arm Compiler, IDE, debugger, RTOS, and middleware.

Compare Corstone Packages

Unsure whether this is the best Corstone reference package for your project? There are a number of Corstone options available, depending on device requirements. Learn more about what’s included in each and the use cases they’re suitable for.

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Related Products and Technologies 

A Foundation of Silicon Success

Explore the processor IP and related technologies that integrate with the Corstone-300.