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Cortex M4 vs Cortex A9

Mohamed Jauhar
Note: This was originally posted on 11th October 2012 at http://forums.arm.com

What are the main difference between these two processors  

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  • 0 Arm Employee Badge
    Note: This was originally posted on 11th October 2012 at http://forums.arm.com

    Scale?  :P

    Technically, the main difference (from a software perspective) is that Cortex-A9 implements ARMv7-A, while the Cortex-M4 implements ARMv7-M.  But I guess that's not the answer you are looking for.

    Practically, ARMv7-A is intended for devices like smartphones, tablets, etc...  Things that run a full-blown OS.  While ARMv7-M is aimed at microcontrollers, which will probably run baremetal code or possibly a tiny RTOS.
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  • 0 Arm Employee Badge
    Note: This was originally posted on 11th October 2012 at http://forums.arm.com

    Scale?  :P

    Technically, the main difference (from a software perspective) is that Cortex-A9 implements ARMv7-A, while the Cortex-M4 implements ARMv7-M.  But I guess that's not the answer you are looking for.

    Practically, ARMv7-A is intended for devices like smartphones, tablets, etc...  Things that run a full-blown OS.  While ARMv7-M is aimed at microcontrollers, which will probably run baremetal code or possibly a tiny RTOS.
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