The Cortex-A5 processor is the smallest, lowest power Armv7 application processor.


The Cortex-A5 is the smallest and lowest power applications processor, delivering rich functionality to high-performance, power-sensitive devices.

Information on Cortex-A5.

Key benefits

  • The smallest application processor designed by Arm with uniprocessor (UP) and multiprocessor (MP) licensing options.

  • Configurable processor with optional NEON, optional FPU, and L1 cache configurable from 4K-64KB.

  • Full feature set of Cortex-A9 processor at one third the area and power.


Architecture Armv7-A
Multicore 1-4 cores
ISA Support
Memory Management Unit (MMU)
Armv7 Memory Management Unit
Debug & Trace

Looking for more information on Arm Cortex-A5?

Get in touch to speak with one of our technical experts.


The Cortex-A5 processor is designed for applications that require virtual memory management for high-level operating systems within a low-power, low-area profile, including:

Digital TV

Smart home



IoT - rich nodes

DVD and audio player

Key features

Feature set of Cortex-A9 for half the size and power

Fully feature compatible with Cortex-A9 processor, provides 70-80% of Cortex-A9 performance and significantly higher efficiency

Most scalable and configurable Armv7-A processor

The Cortex-A5 processor is extremely configurable and scalable to meet performance, power and area requirements for cost sensitive, low power applications

Available in single core and multi core configurations

The Cortex-A5 processor is available in two variants: as a single core Cortex-A5 UP processor and as Cortex-A5 MP where it can scale up to four processor cores in a cluster


The Cortex-A5 is the smallest and lowest power applications processor, delivering rich functionality to high-performance, power-sensitive devices. As Arm's most energy-efficient Armv7 applications processor, the Cortex-A5 gets more work done per unit of energy. This results in longer battery life and less heat dissipation in wearable and mobile devices.

The processor’s small physical size also means reduced manufacturing costs, reduced system leakage and increased low-cost integration. Compared to the Cortex-A9 processor, the Cortex-A5 achieves more than 50% power efficiency while maintaining around 70-75% of the same performance level, making it ideal for wearable technology.

The Cortex-A5 processor is designed to be a highly configurable processor. The instruction and data cache sizes, for example, can be configured from a 64KB maximum size to as small as 4KB for cost-sensitive applications requiring a small application processor with a Memory Management Unit (MMU).

The Cortex-A5 also offers other configurability options such as optional Floating-Point Unit (FPU) and NEON which enable designers to make trade-offs for performance and cost in their targeted application. In its smallest possible configuration with 4KB caches, the Cortex-A5 can be just 0.2mm2 in size at 28nm process technology.


Arm training courses and on-site system-design advisory services enable licensees to efficiently integrate the Cortex-A5 processor into their design to realize maximum system performance with lowest risk and fastest time-to-market.

Arm training courses Arm Design Reviews

  • Manual containing technical information.
  • Cortex-A5 Technical Reference Manual

    The main resource for hardware and software engineers implementing the Cortex-A5 processor in system designs.

    Read here
  • A program that is running on a desktop.
  • Cortex-A Series Programmer's Guide for Armv7-A

    Common to all Cortex-A series processors, this programmer's guide is useful for assembly and C language application development for Armv7-A.

    Get the guide
  • a ulink, a board, a desktop.
  • Development Tools for Cortex-A

    Arm and our partners provide specialist code generation, debug and analysis tools for software development on Cortex-A series processors, such as DS-5 Development Studio.

    Learn more

  • Product due to be released to  market.
  • Arm Design Reviews

    Arm's on-site design review service gives licensees confidence that their Cortex-A5 CPU is implemented efficiently, to provide maximum system performance, with lowest risk and fastest time-to-market.

    Learn more
  • The top half of a human.
  • Questions? Request more information

    Learn more about Cortex-A5, Arm’s smallest, lowest power Armv7 application processor. Contact us to speak with our technical team.

    Find out more