Rahul Sharma (Editor)

ARM Cortex A9

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Designed by  ARM Holdings
Microarchitecture  ARMv7-A
L1 cache  32 KB I, 32 KB D
Max. CPU clock rate  0.8 GHz  to 2 GHz
Cores  1–4
ARM Cortex-A9
L2 cache  128 KB–8 MB (configurable with L2 cache controller)

The ARM Cortex-A9 MPCore is a 32-bit processor core licensed by ARM Holdings implementing the ARMv7-A architecture. It is a multicore processor providing up to 4 cache-coherent cores.



Key features of the Cortex-A9 core are:

  • Out-of-order speculative issue superscalar execution 8-stage pipeline giving 2.50 DMIPS/MHz/core.
  • NEON SIMD instruction set extension performing up to 16 operations per instruction (optional).
  • High performance VFPv3 floating point unit doubling the performance of previous ARM FPUs (optional).
  • Thumb-2 instruction set encoding reduces the size of programs with little impact on performance.
  • TrustZone security extensions.
  • Jazelle DBX support for Java execution.
  • Jazelle RCT for JIT compilation.
  • Program Trace Macrocell and CoreSight Design Kit for non-intrusive tracing of instruction execution.
  • L2 cache controller (0–4 MB).
  • Multi-core processing.
  • ARM states that the TSMC 40G hard macro implementation typically operating at 2 GHz; a single core (excluding caches) occupies less than 1.5 mm2 when designed in a TSMC 65 nanometer (nm) generic process and can be clocked at speeds over 1 GHz, consuming less than 250 mW per core.


    Several system on a chip (SoC) devices implement the Cortex-A9 core, including:

  • Altera SoC FPGA
  • AMLogic AML8726-M
  • Apple A5, A5X
  • Broadcom BCM11311 (Persona ICE)
  • Calxeda EnergyCore ECX-1000
  • Entropic EN7588
  • Freescale Semiconductor i.MX6
  • HiSilicon K3V2 -Hi3620
  • Marvell Avastar 88W8787, used in the Sony PlayStation Vita
  • MediaTek MT6575 (single core), MT6577 (dual core)
  • Mindspeed Technologies Mindspeed Comcerto 2000
  • Nufront NuSmart 2816, 2816M, 115
  • Nvidia Tegra 2 (without NEON extensions), Tegra 3 and Tegra 4i
  • Trident Microsystems 847x/8x/9x SoC family
  • Renesas Electronics RZ/A1H,M,L,LU Family
  • Samsung Exynos 4210, 4212, 4412, 4415
  • Rockchip RK3066, RK292x, RK31xx
  • STMicroelectronics SPEAr1310, SPEAr1340
  • ST-Ericsson Nova A9500, NovaThor U8500, NovaThor U9500
  • Texas Instruments OMAP4 processors
  • Texas Instruments Sitara AM437x
  • WonderMedia WM8850, WM8950 and WM8980
  • Xilinx Extensible Processing Platform
  • ZiiLABS ZMS-20
  • References

    ARM Cortex-A9 Wikipedia