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Why does the ARM A15 processor have so many DVFS levels ?

Kiran Chandramohan
Arm Employee Badge

For eg. the A15 on the Samsung Exynos 5422 has around 19 DVFS levels which varies frequencies from 200MHz to 2GHz.

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  • 0 Arm Employee Badge in reply to Kiran Chandramohan

    We do of course provide guidance on what we expect, but on the whole it's entirely down to the silicon implementation, as different partners will want to achieve different things for their designs to suit their target market.

    Even on any one process node it is possible to move the eventual performance/power/area characteristics around significantly depending what a given SoC wants to achieve (lower static power, lower dynamic power, smaller area, faster frequency, etc) just by altering the choices of transistors used.

    Cheers,
    Pete

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  • 0 Arm Employee Badge in reply to Kiran Chandramohan

    We do of course provide guidance on what we expect, but on the whole it's entirely down to the silicon implementation, as different partners will want to achieve different things for their designs to suit their target market.

    Even on any one process node it is possible to move the eventual performance/power/area characteristics around significantly depending what a given SoC wants to achieve (lower static power, lower dynamic power, smaller area, faster frequency, etc) just by altering the choices of transistors used.

    Cheers,
    Pete

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