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    Cortex-A8 Overview

     

    The ARM Cortex™-A8 processor is based on the ARMv7 architecture and has the ability to scale in speed from 600MHz to greater than 1GHz. The Cortex-A8 processor can meet the requirements for power-optimized mobile devices needing operation in less than 300mW; and performance-optimized consumer applications requiring 2000 Dhrystone MIPS. The Cortex-A8 high-performance processor is proven in end devices today.  From high-end feature phones to netbooks, DTVs, printers and automotive-infotainment, the Cortex-A8 processor offers a proven high-performance solution with millions of units shipped annually.

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    The processor is particularly suited to high-performance applications.

    • Frequency from 600MHz to 1GHz and above
    • High-performance, Superscalar microarchitecture
    • NEON™ technology for multi-media and SIMD processing
    • Binary compatibility with ARM926, ARM1136, and ARM1176 Processors

     

     

     

    Cortex-A8 Feature

    Feature Description

    NEON

    128-bit SIMD engine enables high performance media   processing.  Using NEON for some Audio, Video, and Graphics   workloads eases the burden of supporting more dedicated accelerators across   the SoC and enables the system to support the standards of tomorrow

    Optimized Level 1 cache

    The Level 1 cache is integrated tightly into the processor   with a single-cycle access time.  The caches combine minimal access   latency with hash way determination to maximize performance and minimize   power consumption.

    Integrated Level 2 cache

    The Level 2 cache is integrated into the core for ease of   integration, power efficiency, and optimal performance.  Built using   standard compiled RAMs, the cache is configurable from 0K – 1MB.  The   cache can be built using compiled memories and has programmable   delay to accommodate different array characteristics

    Thumb-2 Technology

    Delivers the peak performance of traditional ARM code   while also providing up to a 30% reduction in memory required to store   instructions.

    Dynamic Branch Prediction

    To minimize branch wrong prediction penalties,   the dynamic branch predictor achieves 95% accuracy across a wide range   of industry benchmarks.  The Predictor is enabled by branch target and   global history buffers.  The replay mechanism minimizes miss-predict   penalty.

    Memory Management Unit

    A full MMU enables the Cortex-A8 to run rich operating   systems in a variety of Applications

    Jazelle-RCT Technology

    RCT Java-acceleration technology to optimize Just In Time   (JIT) and Dynamic Adaptive Compilation (DAC), and reduce memory footprint by   up to three times

    Memory System

    Optimized for power-efficiency and high-performance.    Hash array in the L1 cache limits activation of the memories to when they are   likely to be needed.  Direct interface between the integrated,   configurable L2 cache and the NEON media unit for data streaming.    Banked L2 cache design that enables only one bank at a time.  Support   for multiple outstanding transactions to the L3 memory to fully utilize the   CPU.

    TrustZone Technology

    Allows for secure transactions and Digital Rights   Management (DRM)

     

     

     


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