microprocessor.what is microprocessor ?.evolution of microprocessor.

General Architecture of microprocessor Microprocessor architecture defines suitable placement of its various functional blocks in the form of required circuitry for efficient flow of data and result from one block to another. the general purpose architecture of microprocessor is shown in figure: Architecture of microprocessor contains: ALU(Arithmetic Logical Unit): It contains of an adder,an accumulator,a temporary register,and a shift register and a status register. This ALU unit performs various arithmetic and logic operation. General purpose register: In the microprocessor,there are 8-bit general purpose register or as a 16-bit register pairs,when used in register pair mode . These are used for both storing data as well as the aaddress. Special purpose register : This consists of accumulator,Program counter (PC),Stack pointer(SP) and status flag register. These register are used for some specific applications designated by the manufacturers. Instruction decoder : This receives the

    what do you understand by microprocessor ? The microprocessor is simply a programmable integrated device that has computing and decision making  capability similar to that of central pricessing unit(CPU).A microprocessor is designed to perform arithmetic and logical operations like addition, substraction,etc. Typical microprocessor operations include comparing two numbers and fetching numbers from one area to another. Nowadays,the microprocessor is being used in awide range of products called microprocessor based products or systems.  A microprocessor typically serves as a central processing unit microprocessor in a computer system.                                                              A programmable machine The fact that the microprocessor is programmable means it can be instructed to perform given task within its capability. How Does the Microprocessor Work ? Assume that a program and data are already entered in the R/W memory(Read/write memory ) The