CortexR4

The Cortex-R4 is a dual-issue, in-order processor core designed by ARM Holdings. It is part of the Cortex-R family, which is optimized for real-time applications. The Cortex-R4 supports ARM's Thumb-2 instruction set, offering a balance of performance and code density. It features a single-precision floating-point unit (FPU) and optional support for the NEON advanced SIMD extension for improved media and signal processing capabilities.

Designed for high reliability and determinism, the Cortex-R4 is commonly used in applications where low latency and predictable execution are critical. This includes automotive systems, industrial control, and embedded safety systems. The core incorporates features like ECC for memory protection and advanced interrupt handling mechanisms to ensure responsiveness. It is available in both 32-bit and 64-bit configurations.

The Cortex-R4 processor is known for its power efficiency, making it suitable for battery-powered devices. Its architecture prioritizes interrupt latency and response time, crucial for systems that must react to external events within strict deadlines. The Cortex-R4 is often found in microcontrollers and System-on-Chips (SoCs) that require robust real-time performance and safety certifications.