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ARM Cortex-A
The ARM Cortex-A is a group of 32-bit and 64-bit RISC ARM processor cores licensed by ARM Holdings. The cores are intended for application use. The group consists of the 32-bit ARM Cortex-A5, ARM Cortex-A7, ARM Cortex-A8, ARM Cortex-A9, ARM Cortex-A12, ARM Cortex-A15, and ARM Cortex-A17 MPCore,〔 and the 64-bit ARM Cortex-A53, ARM Cortex-A57, and ARM Cortex-A72.
The 64-bit ARM Cortex-A cores implement the ARMv8-A profile of the ARMv8 architecture.
The 32-bit ARM Cortex-A cores implement the ARMv7-A profile of the ARMv7 architecture. The main distinguishing feature of the ARMv7-A profile, compared to the other two profiles, the ARMv7-R profile implemented by the ARM Cortex-R cores and the ARMv7-M profile implemented by most of the ARM Cortex-M cores, is that only the ARMv7-A profile includes a memory management unit (MMU).〔("Cortex-A Series" ).〕 Many modern operating systems require a MMU to run.
==Overview==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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