The Rise of ARM: 10 Facts Behind the World’s Most Popular CPU Architecture

10 Facts About ARM Processors

ARM processors have become one of the most widely deployed processor architectures in the world, powering billions of devices across consumer, industrial, automotive, and embedded markets. From smartphones and IoT devices to industrial computers and edge computing platforms, ARM technology is at the heart of modern connected systems.

ARM’s success comes from its combination of energy efficiency, flexibility, and scalability. Rather than manufacturing its own CPUs, ARM develops the processor architecture and licenses its technology to semiconductor companies, allowing them to create specialised chips for different applications.

This approach has helped ARM become the leading architecture for embedded systems, where low power consumption, reliability, compact designs, and long product lifecycles are essential. Its ability to scale from tiny microcontrollers to powerful computing platforms has made ARM a key technology across a wide range of industries.

Whether you are developing an embedded system or selecting industrial computing hardware, understanding the fundamentals of ARM technology can help you choose the right solution.

1. ARM is a processor architecture, not a CPU manufacturer

ARM is a processor architecture developed by ARM Holdings. Unlike companies such as Intel or AMD, ARM does not typically manufacture processors itself. Instead, ARM licenses its technology to semiconductor manufacturers who design and produce their own ARM-based chips for different markets and applications. Companies such as NXP, Qualcomm, STMicroelectronics, and MediaTek produce ARM-based processors used across consumer, industrial, automotive, and embedded applications.

2. ARM processors are designed for efficiency

One of the biggest advantages of ARM technology is its excellent performance-to-power ratio. ARM processors are designed to deliver reliable computing performance while consuming less energy, making them ideal for applications where heat, power consumption, and space are important considerations. Key benefits include:

• Lower power requirements: This technology consumes less electricity, contributing to lower energy bills for consumers and businesses alike.
• Reduced heat output: By generating less heat, the system remains cooler, which enhances component longevity and reliability.
• Fanless system designs: These designs eliminate moving parts, reducing noise and wear while providing a more seamless user experience.
• Smaller hardware footprints: Compact designs allow for easier integration into space-constrained environments, making them ideal for modern applications.
• Improved energy efficiency: Enhanced efficiency translates to better performance per watt, benefiting both the environment and operating costs.

This makes ARM particularly suited to industrial environments where systems may need to run continuously with minimal maintenance.3. Many ARM processors are built as complete System-on-Chip solutions

3. Many ARM processors are built as complete System-on-Chip solutions

Rather than using separate chips for each function, an ARM SoC may include:

• CPU processing cores – These cores are responsible for executing instructions and processing data in a computer system, significantly impacting overall performance.
• GPU graphics acceleration – This technology improves rendering speed and efficiency in graphics-intensive applications, enhancing visual experiences for users.
• Memory controllers – They manage the flow of data between the CPU, memory, and other components, ensuring efficient data processing and system responsiveness.
• USB and storage interfaces – These interfaces allow for the connection of peripherals and storage devices, facilitating data transfer and device interoperability.
• Ethernet connectivity – This feature provides a reliable and high-speed network connection, essential for data transmission and online communication.
• Security features – Built-in security measures protect data and systems from unauthorized access, ensuring user privacy and data integrity.
• AI and machine learning acceleration – These capabilities enhance computational tasks involving artificial intelligence, enabling faster processing and improved algorithm performance.

This integration allows manufacturers to create compact, reliable, and power-efficient embedded systems.

4. ARM processor families are designed for different applications

ARM technology covers a wide range of performance levels, from ultra-low-power microcontrollers to high-performance computing platforms. The main ARM Cortex families include:

Selecting the correct processor family depends on the application requirements, operating system, and required level of processing power.

5. ARM supports a wide range of operating systems

One of ARM’s strengths is its broad software ecosystem. ARM processors support many operating systems, allowing developers to select the platform that best fits their application. Common ARM-compatible operating systems include:

• Linux is a powerful and widely-used open-source operating system that serves as the foundation for many other distributions.
• Windows on ARM offers a version of the Windows operating system designed specifically for ARM architecture, enabling better power efficiency and performance on mobile devices.
• Android is an operating system based on Linux, primarily designed for touchscreen mobile devices, and is the most popular mobile OS globally.
• Ubuntu is a user-friendly Linux distribution known for its ease of use and extensive community support, making it ideal for beginners and professionals alike.
• Debian is a highly stable and versatile Linux distribution that serves as the basis for many other systems, including Ubuntu itself.
• Yocto Linux is a project that allows developers to create custom Linux distributions tailored to their specific needs, particularly for embedded systems.
• FreeRTOS is a real-time operating system kernel for embedded devices that provides a minimalist and efficient environment for running applications.
• Zephyr is a scalable, open-source real-time operating system that is designed for connecting devices in the Internet of Things (IoT) ecosystem.

For industrial applications, Linux-based ARM systems are particularly popular due to their flexibility, security options, and long-term support.

6. ARM64 provides modern 64-bit computing

ARM64, also known as AArch64, is the modern 64-bit version of the ARM architecture. Compared with older 32-bit ARM processors, ARM64 provides improved performance and supports larger memory configurations. Advantages include:

• Support for modern operating systems: This ensures compatibility with the latest software and security features, enhancing overall system stability.
• Increased memory capacity: With more RAM available, users can run multiple applications simultaneously without experiencing slowdowns.
• Improved application performance: Optimized software allows applications to run faster and more efficiently, providing a seamless user experience.
• Better support for advanced workloads such as AI and edge computing: This capability enables organizations to leverage cutting-edge technologies for data analysis and real-time processing.

ARM64 is now widely used in industrial computers, embedded platforms, and connected devices.

7. ARM technology is widely used in industrial applications

ARM processors are increasingly common in industrial environments where reliability, efficiency, and long-term availability are essential. Typical applications include:

• Industrial automation systems: These systems streamline manufacturing processes, reducing labor costs and increasing efficiency.
• Factory monitoring equipment: This equipment enables real-time tracking of production metrics, helping to optimize operations and minimize downtime.
• Medical devices: They enhance patient care through advanced diagnostics and monitoring capabilities, supporting better health outcomes.
• Transportation systems: Smart transportation systems improve traffic management and safety by integrating real-time data analytics.
• Digital signage: This technology enhances communication and engagement by displaying dynamic content in public spaces.
• Robotics: Robots are transforming industries by performing complex tasks with precision and consistency, often in environments unsafe for humans.
• Smart infrastructure: This involves integrating technology into physical structures to improve resource management and sustainability.
• IoT gateways: These devices facilitate seamless communication between IoT devices and the cloud, ensuring reliable data transmission.
• Edge computing platforms: They process data near the source of generation, reducing latency and bandwidth use, and enabling real-time analytics.

The ability to provide powerful computing in a compact, low-power design makes ARM a strong choice for embedded applications.

8. Choosing an ARM processor involves more than just CPU speed

When selecting an ARM-based solution, processor performance is only one part of the decision. Other important considerations include:

• Required RAM capacity – This determines how much memory is necessary for optimal performance and multitasking capabilities.
• Storage options – Various storage configurations affect data access speed, capacity, and overall system efficiency.
• Operating system compatibility – Ensures that the hardware can run the preferred software without issues or limitations.
• Expansion requirements – Identifies the need for additional slots or ports for future upgrades and enhancements.
• Network connectivity – Examines the types of connections available to ensure seamless integration into existing networks.
• Power consumption – Addresses the efficiency of the device in terms of energy usage, impacting overall operational costs.
• Operating temperature range – Specifies the environmental conditions in which the hardware can function reliably.
• Security features – Highlights built-in measures that protect data and safeguard against unauthorized access.
• Product lifecycle requirements – Discusses the expected duration of usability and support for the product, impacting long-term investment.

The best ARM solution is the one that matches the needs of the application rather than simply offering the highest specification.

9. ARM systems can run modern software applications

ARM platforms support a wide range of software, including native ARM applications and operating systems designed specifically for ARM processors. Windows on ARM also provides support for many traditional Windows applications through compatibility technologies, although software performance depends on how the application has been developed.

For industrial deployments, checking software compatibility during the design stage helps avoid issues later in the project.

10. ARM is ideal for long-life embedded systems

Industrial customers often require hardware that can operate reliably for many years in demanding environments. ARM-based systems are frequently selected because they offer:

• Low power operation: Many modern devices are designed to operate with minimal energy consumption, which enhances efficiency and reduces operational costs.
• Reliable fanless designs: Fanless designs promote silent operation and decrease potential points of failure, making them ideal for various applications.
• Compact form factors: Compact designs allow for greater flexibility in installation and perfect fit in space-constrained environments.
• Strong software support: A robust software ecosystem ensures compatibility and longevity, providing users with peace of mind in their technology choices.
• Long product availability: Extended product life cycles are crucial for organizations, as they minimize costs associated with frequent upgrades and replacements.
• Reduced maintenance requirements: Systems engineered for lower maintenance lead to less downtime and lower overall management costs.

These characteristics make ARM a popular choice for industrial computers, embedded platforms, and edge devices.

Final Thoughts

ARM processors have transformed the embedded computing market by providing efficient, scalable, and flexible solutions for a wide range of applications. From industrial automation and IoT to edge AI and connected devices, ARM technology enables manufacturers and system developers to build reliable computing platforms that meet modern performance and efficiency requirements.

Understanding the fundamentals of ARM processors is the first step towards selecting the right hardware platform for your next project.