[Info] difference between arm cortex A R M

application , Cortex A==> 高效能手機

embeded, Cortex R ==> mcu (Flash Controller)

real time, Cortex M  ==> 車用mcu

https://www.slideshare.net/ARMHoldings/optimizing-arm-cortex-a-and-cortexm-based-heterogeneous-multiprocessor-systems-for-rich-embedded-applications-kdave