Describe the functions of ALU, resisters, CU, BIU, Cache and FPU.

ALU :An arithmetic logic unit (ALU) is a digital circuit used to perform calculations and logic operations

Registers:register holds the address of memory where CPU wants to read or write data.

CU:The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor.

BIU:BIU takes care of all data and addresses transfers on the buses for the EU like sending addresses, fetching instructions from the memory, reading data from the ports and the memory as well as writing data to the ports and the memory.

Cache:Cache is used to temporarily hold instructions and data that the CPU is likely to reuse.

FPU:A floating-point unit (FPU, colloquially a math coprocessor) is a part of a computer system specially designed to carry out operations on floating-point numbers.

Explanation:

This is all I can say