Fast Intelligent IoT Device Design and Deployment

Arm Corstone-320 includes software and an example subsystem integrating the Arm Cortex-M85 CPU, Arm DMA-350, Arm Mali-C55 ISP and the Arm Ethos-U85 NPU with support for transformer networks.


Corstone reduces complexity for ASIC designers and software developers to speed up the design and deployment of secure, AI-capable devices. Cortex-M85 is Arm’s highest performance Cortex-M processor, making Corstone-320 the perfect starting point for high-performance SoCs targeting a range of IoT applications. Ethos-U85 is a third-generation NPU with support for CNNs and transformer networks.

Features and Benefits

High Performance for Scalar, DSP, and ML

The Cortex-M85 processor offers a new milestone in microcontroller (MCU) performance for scalar, DSP, and ML workloads. With built-in Arm TrustZone for Armv8-M technology, it enables rapid, secure SoC development.

Intelligent Devices

The Ethos-U85 is a third-generation NPU in the Ethos-U product line with support for traditional CNNs and transformer networks to future proof devices as the AI market evolves.

Simplify the IoT Product Design Cycle

Corstone-320 is available in an Arm IoT Reference Design Platform configuration, providing a unique approach to IoT software design.

Arm IoT Reference Design Platform

IoT Reference Design Platform reduces design complexity and speed time-to-market. With pre-integrated, pre-verified IP, supporting ecosystem software and tools and Arm prototyping platforms.




Components of Corstone-320

Corstone-320 includes firmware, drivers, middleware, example applications, cloud integrations, ML models, and the example heterogeneous compute SSE-320 subsystem based on Cortex-M85. It comes with a range of complementary system IP, technical documentation, scripts, and analysis reports to accelerate the design and deployment of a high-performance, secure IoT devices.

Software and Tools

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


To find out more about the software components and development tools in Corstone-320, download the comparison table.

Download Comparison Table

Related Products


Cortex-M85 provides increased security and high performance on a single Cortex-M without the need to migrate to multicore or heterogeneous platforms.

Arm Ethos U85 NPU chip image


Designed to accelerate ML inference in area-constrained embedded and IoT devices. Available as an option with the Corstone-320 reference package.

Arm Mali-C55 Chip Icon


Configurable, energy-efficient, high-performance image signal processor to enable outstanding image quality in a very small silicon area.

Architecture and Technologies

A Foundation of Silicon Success

Talk with an Expert

Find out how Corstone-320 enables faster time-to-market for your secure, AI-capable, high-performance IoT systems.

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Getting Started

Explore resources and documentation to help you start developing with Corstone-320.

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