MICROPROCESSOR AS A CPU

we can also view the microprocessor as a primary components of a computer.Traditionally,the computer is represented in block diagram as shown in fig 1.The block diagram shows that the computer has four components: Memory,Input,Output,and the central processing unit(CPU),which consists of the Arithmetic logic Unit (ALU) and control unit.The CPU contains various registers to store data,the ALU to perform arithmetic and logical operations,instruction decoders,counters,and control lines.The CPU reads instructions from the memory and performs the tasks specified.It communicates with input/output devices either to accept or to send data,These devices are also known as peripherals.The CPU is the primary and central players in communicating with devices such as memory,input and output.However,the timing of the communication process is controlled by the group of circuits called the control unit.In the late 1920s, the CPU was designed with discrete components on various boards.with  the advent of the integrated circuit technology,it became possible to build the CPU on a single chip;this came to be known as a microprocessor,and the traditional block diagram shown  in fig 2.