It may have its own internal control sequence unit , which is not to be confused with the CPU 's main control unit , some registers , and other internal units such as a sub -- arithmetic logic unit ( sub-ALU ) or a floating point unit ( FPU ) , or some smaller and more specific components .
It may have its own internal control sequence unit , some registers , and other internal units such as a sub-ALU or FPU , or some smaller , more specific components .