SMARC 2.2: A Modular Computing Standard for Next-Generation ARM and Edge Computing

With the rapid growth of industrial automation, edge computing, and embedded AI, traditional single-board computers (SBCs) are increasingly showing limitations in performance scalability, long-term availability, and system reliability. SMARC (Smart Mobility ARChitecture), a System-on-Module (SoM) standard for low-power embedded applications, has emerged as a key choice in industrial and edge computing. The release of SMARC 2.2 in 2024 further enhances the standard's adaptability for high-performance ARM SoCs, industrial lifecycles, and system compatibility through maintenance-focused improvements.

What is SMARC 2.2?

SMARC 2.2 is the latest version of the SMARC module specification defined by SGET (Standardization Group for Embedded Technologies). It retains the compact 82 × 50 mm form factor and 314-pin MXM edge connector, ensuring backward compatibility while providing greater design flexibility for next-generation SoCs and high-speed interfaces.

Core objective: Deliver a long-term evolvable, high-performance embedded computing platform under constraints of low power and small size.

Key Updates in SMARC 2.2

SMARC 2.2 primarily focuses on maintenance enhancements, including refined pinout definitions, updated signal descriptions, support for PCIe Gen4, addition of SoundWire as an alternative audio interface, and various bug fixes. These changes better accommodate next-generation ARM SoCs (e.g., RK3588, i.MX 9 series) and improve overall reliability and developer experience.

• High-Speed Interface Enhancements
  • Extended PCIe support up to Gen4 (SoC-dependent), ideal for NVMe SSDs, high-speed network cards, or AI accelerators.
  • Clearer USB 3.x and Type-C definitions.
  • Display interfaces: Support for DP 1.4, eDP, HDMI 2.0+, with a shift toward modern interfaces like MIPI-DSI.
  • MIPI CSI-2: Continued support for industrial vision and edge AI cameras.
• Memory and Bandwidth Support
  • Improved compatibility with LPDDR5 for higher bandwidth, lower power consumption, and better suitability for AI inference and image processing.
• Industrial-Grade Power and Management Optimizations
  • Clearer power sequencing and state definitions.
  • More reliable Suspend/Resume behavior.
  • Better suited for 7×24-hour continuous operation.

Differences Between SMARC 2.2 and SMARC 2.1.1

Why SMARC 2.2 is Ideal for Industrial and Edge Computing

• Modular Design Reduces Risk
  • Separation of SoM and carrier board allows SoC upgrades without altering the overall system structure.
  • Significantly lowers long-term maintenance costs.
• Standardized Interfaces Avoid Vendor Lock-In
  • Multiple module suppliers available, supporting global supply chains.
• Long-Term Planning for AI and High-Speed Peripherals
  • Reserved bandwidth for future 5–10 year system evolution.

Typical Application Scenarios

• Industrial controllers / ARM-based IPCs
• Edge computing gateways
• Industrial vision and AI inference devices
• Energy storage management systems / Power equipment
• Robot control and HMIs
• Building automation and energy management systems

Conclusion

Although SMARC 2.2 emphasizes maintenance updates, its refined specifications and forward-looking adjustments ensure the standard remains aligned with ARM architectures and edge computing demands. While preserving compact size and low-power advantages, it provides a solid foundation for next-generation industrial controllers and edge AI devices. For industrial products seeking a balance between performance, reliability, and lifecycle, SMARC 2.2 is a standard worth long-term investment.