Interview QA » ARM Cortex-R4 vs. R5 vs. R7: A Comparison

ARM Cortex-R4 vs. R5 vs. R7: A Comparison

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This article outlines the key differences between the ARM Cortex-R4, Cortex-R5, and Cortex-R7 processors. These processors are widely used in embedded systems, particularly those requiring real-time performance and safety features.

Feature Comparison Table

Features	Cortex-R4	Cortex-R5	Cortex-R7
Core Architecture	ARMv7-R	ARMv7-R	ARMv7-R
Performance	Balanced	Enhanced	High
Error Management	Basic ECC, dual-issue pipeline	Improved ECC, dual-core lockstep	Advanced ECC, out-of-order execution, dual-core lockstep
Memory Interfaces	Tightly coupled memory (TCM)	Extended ECC support, TCM	Extended ECC support, TCM
Safety Standards	ISO 26262, IEC 61508	ISO 26262, IEC 61508	ISO 26262, IEC 61508
Use Cases	Automotive, industrial, HDDs	Safety-critical applications, automotive, medical devices	High-performance safety-critical applications, advanced automotive systems

ARM Cortex-R Architecture

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