High-Efficiency Arm Cortex-A CPU for Safety-Critical Applications

Arm Cortex-A520AE is a high-efficiency Armv9.2 CPU designed to support the demanding safety-critical tasks of the next generation of SDVs. The merged-core micro-architecture and DynamIQ technology deliver new levels of scalability to address the needs of zonal, in-vehicle infotainment and advanced driver-assistance (ADAS) systems. It’s compatible with Arm Cortex-A720AE for heterogenous compute, where the perfect balance of efficiency and performance can be achieved.

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Features and Benefits

Flexibility with Split-Lock

Designed to balance performance and safety across quality management (QM), ISO 26262 ASIL B and ASIL D use cases. Boot in lock mode for safety-critical applications, or boost performance in split or hybrid mode, utilizing the configurable safety features, such as transient fault protection (TFP) and software test libraries (STL), for increased fault detection.

Efficiency First Design

Micro-architecture improvements and the merged-core micro-architecture ensure power efficiency in the smallest silicon footprint to support the low power demands of EVs. Cortex-A520AE delivers these efficiencies, while bringing a significant performance uplift over previous generations to suit the emerging workloads of the SDV.

Advanced Features

Based on the Armv9.2-A architecture, it delivers new features designed to increase performance for AI and ML workloads, enhance security for the SDV, and ensure quality of service that is critical to automotive applications. Architecturally compatible, Cortex-A520AE can be paired with the Cortex-A720AE CPU within a single DSU-120AE cluster.

Cortex-A520AE Specification


Arm Cortex-A520AE is a high-efficiency Armv9.2-A CPU, with industry-leading functional safety features for safety-critical applications. This integrates with the new DSU-120AE and is compatible with Arm Cortex-A720AE for building heterogenous compute clusters.

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Key Documentation
Use Cases

Where Innovation and Ideas Come to Life

The IVI system is the main interaction that drivers have with their car. Powered by cutting-edge technology, this digital experience is continually expanding and will become a significant source of future revenue.

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Find out how Cortex-A520AE can provide the balance of power efficiency and performance for Automotive use cases.

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Explore Products and Technologies

Arm Cortex-A720AE


First Armv9-A high performance Arm Cortex-A CPU designed for safety-critical applications. Based on DynamIQ technology, achieves new levels of performance, power efficiency, and safety for AE CPUs.

Arm CoreLink GIC-720AE

CoreLink GIC-720AE

Arm CoreLink GIC-720AE is a safety-enabled generic interrupt controller capable of supporting both applications and real-time processors in systems with functional safety requirements up to ASIL D. It also supports mixed-criticality workloads.

System IP

Arm System IP enables system designers to configure and build high-performance, power-efficient SoCs, while further differentiating with Arm processors and their own IP elements. System IP is integrated via industry-standard AMBA interfaces.

Architecture and Technologies

A Foundation of Silicon Success