Skip to main content

What is a Microprocessor?

By

  • A microprocessor is a multipurpose, programmable, clock driven register and ALU (arithmetic and logic unit) based electronic device. 
  • A microprocessor reads the binary instructions from the memory.
  • It accepts the binary data as input.
  • Then it processes the data according to the instructions and provides the result as output.
  • Microprocessor is just like a human brain.

Block Diagram of Microprocessor
  • There are four major components of a microprocessor based system. They are microprocessor (CPU), memory, input device and output device.
  • Microprocessor works on binary digits 0 and 1. These digits are represented in terms of electrical voltages. Digit 0 represents one voltage level (low) and digit 1 represents other voltage level (high).
  • The user can enter data and instructions through devices like keyboard. Such devices are called input devices.
  • Then the microprocessor reads the instructions from memory and processes the data.
  • The result is displayed by a device like printer, LCD. Such devices are called output devices.
  • Memory is a device that stores the binary instructions and data. It is made up of 8 bit registers that is capable of storing 8 binary digits.
  • The physical components of microprocessor based system are known as hardware.
  • The set of instructions written for the microprocessor to do some task is called a program.
  • A group of programs is called software.
Labels:

Comments

Post a Comment

Popular posts from this blog

Program to pack the two unpacked BCD numbers

By
Statement: Pack the two unpacked BCD numbers stored in memory locations 2000H and 2001H and store the result in memory location 2002H. The least significant digit is stored at 2000H. Example: (2000H) = 04H (2001H) = 09H Result = (2002H) = 94H Program: LDA 2001H                        ; Obtain the most significant BCD digit RLC                                    ; Rotate left  RLC                                    ; Rotate left  RLC                                    ; Rotate left  RLC                                    ; Rotate left...
Post a Comment
Read more

Program to exchange the contents of two memory locations

By
Statement: Exchange the contents of memory locations 2000H and 2001H. Example:  Initially, (2000H) = 34H (2001H) = 20H After exchanging, (2000H) = 20H (2001H) = 34H Program 1 using direct addressing instructions: LDA 2000H               ; Get the contents of location 2000H into accumulator MOV B, A                  ; Move the contents of accumulator into register B LDA 2001H                ; Get the contents of location 2001H into accumulator STA 2000H                 ; Store the contents of accumulator into location 2000H MOV A, B                  ; Move the contents of register B into accumulator STA 2001H                 ; Store the contents of accumulator into location 2001H HLT  ...
Post a Comment
Read more

Program to add the contents of two memory locations

By
Statement: Add the contents of memory locations 2000H and 2001H and place the result in the memory locations 2002H and 2003H. Example: (2000H) = C3H (2001H) = 29H Result = C3H + A9H = 016CH (2002H) = 6CH (2003H) = 01H Program: LXI H, 2000H                   ; HL points to location 2000H MOV A, M                        ; Move the contents of 2000H into accumulator INX H                                ; HL points to location 2001H ADD M                              ; Add the contents of 2001H with the contents of accumulator INX H                                ; HL points to location 2002H MOV M, A      ...
Post a Comment
Read more