MEJ32 IP: The Virtual Software Processor for Embedded Systems

The Most Efficient Approach to Embedded Software Processing

MEJ32 is the core of all MicroEJ products. It is a virtual software processor designed to bring the flexibility and efficiency of software-defined architectures to embedded systems. By enabling a secure, portable, and high-performance execution environment, MEJ32 allows developers to write applications in Java, Kotlin, JavaScript, and C while ensuring optimal execution on resource-constrained hardware.

MEJ32 is build to be bug-free. Visit our Quality Assurance Webpage to find out more.

Portable Across Architectures

• Runs the same software stack across diverse hardware platforms without modification.
• Supports multiple Instruction Set Architectures (ISAs), including ARM Cortex-M, Cortex-A, RISC-V, PowerPC, MIPS, and Xtensa.
• Compatible with major C/ELF ABI standards (GCC, IAR, Keil, Clang).

Efficient Execution on
Embedded Devices

• Optimized high-density instruction set for maximum performance.
• Smart Memory Management Unit (Smart MMU) ensures automatic defragmentation and memory safety.
• Preemptive and round-robin scheduling provides efficient and consistent multi-task execution.

Security & Code Verification

• Built-in binary verification prevents unsafe or unauthorized execution.
• Sandboxing mechanism isolates applications from system resources.
• Trusted Application environment for secure embedded deployments.

Multi-Language Support

• Supports Java, Kotlin, JavaScript, C, and Domain-Specific Languages (DSLs).
• Seamlessly integrates multiple programming models into a unified software pipeline.

Key Figures

How It Works

MEJ32 is a software-defined execution environment that sits between the application layer and the underlying hardware, providing:

1 • Compilation & Verification

• Java, Kotlin, and JavaScript applications are compiled into binary class files (.class, .jar).
• C code is compiled into ELF object files (.o, .a).
• Binary verification ensures compliance with runtime safety and memory constraints.

2 • Efficient Linking & Deployment

• The MicroEJ SOAR linker optimizes and merges executable components.
• Generates compact, high-performance binaries ready for execution.

3 • Optimized Execution Environment:

• Automatic thread stack management for dynamic workload adaptation.
• Deterministic and incremental garbage collection for memory efficiency.
• Efficient use of hardware and hardware acceleration to minimize overhead.