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Computer Applications Summer holiday homework Just as the human brain is the most important part of the human body as it directs and controls the actions of a body, CPU is the brain of Computer. The central processing unit (CPU) consists of six main components: • control unit (CU) • arithmetic logic unit (ALU) • registers. • cache. • buses. • clock.

1 . The control unit of the central processing unit regulates and integrates the operations of the computer. It selects and retrieves instructions from the main memory in proper sequence and interprets them so as to activate the other functional elements of the system at the appropriate moment. 2. In computing, an arithmetic logic unit is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. This is in contrast to a floating-point unit, which operates on floating point numbers.

3. A processor register is a quickly accessible location available to a computer's processor. Registers usually consist of a small amount of fast storage, although some registers have specific hardware functions, and may be read-only or write-only. 4. A CPU cache is a hardware cache used by the central processing unit of a computer to reduce the average cost to access data from the main memory. A cache is a smaller, faster memory, located closer to a processor core, which stores copies of the data from frequently used main memory locations.

5. Three types of buses are used. Address bus - carries memory addresses from the processor to other components such as primary storage and input/output devices. Data bus - carries the data between the processor and other components. Control bus - carries control signals from the processor to other components. 6. The clock speed measures the number of cycles your CPU executes per second, measured in GHz (gigahertz).

Some images of Various Components of a CPU. 1. Control Unit 2. Arithmetic logic unit

3. Registers 4. Cache

5. Buses