Interview QA » Embedded Systems » 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

FeaturesCortex-R4Cortex-R5Cortex-R7
Core ArchitectureARMv7-RARMv7-RARMv7-R
PerformanceBalancedEnhancedHigh
Error ManagementBasic ECC, dual-issue pipelineImproved ECC, dual-core lockstepAdvanced ECC, out-of-order execution, dual-core lockstep
Memory InterfacesTightly coupled memory (TCM)Extended ECC support, TCMExtended ECC support, TCM
Safety StandardsISO 26262, IEC 61508ISO 26262, IEC 61508ISO 26262, IEC 61508
Use CasesAutomotive, industrial, HDDsSafety-critical applications, automotive, medical devicesHigh-performance safety-critical applications, advanced automotive systems

ARM Cortex-R Architecture

ARM Cortex-R Architecture

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Atmel Ships SAM D20 Cortex-M0+ Microcontrollers

Atmel Corporation ships its new Atmel® SAM D20 microcontrollers. This is the first series in a new family of ultra-low power embedded Flash microcontrollers based on the ARM® Cortex®-M0+ processor.

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