The ARM Cortex-R4 processor is the smallest deeply embedded real-time processor based on the ARMv7-R architecture.
The Cortex-R4 processor delivers high-performance, real-time responsiveness, reliability and dependability with high error-resistance. It offers excellent energy efficiency and cost effectiveness for ASIC, ASSP and MCU embedded applications. The Cortex-R4 processor is very flexible and can be configured at synthesis time to optimize its feature set for a precise match with application requirements.
It is commonly used in high-volume, deeply embedded System-on-Chip (SoC) applications such as hard-disk drive controllers, wireless baseband processors, consumer products and electronic control units for automotive systems.
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The Cortex-R4 processor is designed for implementation on advanced silicon processes with an emphasis on improved energy efficiency, real-time responsiveness, advanced features and ease of system design. The processor provides a highly flexible and efficient two-cycle local memory interface, enabling SoC designers to minimize system cost and energy consumption.
Advanced features like the Vectored Interrupt Controller (VIC) port, Tightly Coupled Memory (TCM) system and the Low-Latency Interrupt Mode (LLIM) help to make the Cortex-R4 highly deterministic and ensure that interrupt entry can be accelerated. The processor’s 8-stage, dual-issue pipeline with instruction pre-fetch and branch prediction ensures fast instruction execution and high performance, while an integrated Memory Protection Unit (MPU), Error-correcting code (ECC) memory and dual-core lock-step configuration ensures the processor’s reliability and ability to handle errors.