System-on-chips (most big chips these days) are so complex they usually have the same thing one level deeper: On chip embedded controllers, often an mcu.
You might find that 'one arm chip' has many independent arm cpu cores carrying out different functions mostly completely hidden from end user behind firmware or rom
Amusingly enough, the embedded controller on some of the newer Allwinner ARM SoCs is apparently OpenRISC of all things. Guess it saved them some licensing fees.
You might find that 'one arm chip' has many independent arm cpu cores carrying out different functions mostly completely hidden from end user behind firmware or rom