Introduction to Microprocessor

Fig: Microprocessor

A microprocessor is a multipurpose programmable, clock driven register based electronic device that reads binary instruction from storage device called memory accept binary data as input and process data according to those instruction and provide result as O/P.

A.    ALU (Arithmetic and Logic Unit): This area of microprocessor performs various functions on data. The ALU performs arithmetic operation like addition subtraction and logical operation like AND, OR, X-OR etc.

B.    CU (Control Unit): This area provides the timing and control signal to all the operation in the microprocessor. It contains the flow of data between the microprocessor memory and peripheral.

C.     Register Array: This area of microprocessor consists of various register identified by A,B,C,D,E,F,G,H,I. These register are used to temporary store the data during the execution of program.

Micro Computer:

A small computer that contains microprocessor is microcomputer.

   

Micro Controller:

Microcontroller

Counters and Time delay:

                              T-State          Total Time

MVI C, FFH         7-T                  1x7=7

L1: DCR C            4-T                  255x4=1020

      JNZ L1            10/7               254x10x7=2547

                                                                          3574

8085 Microprocessor frequency (f)=2MHz

Time delay=1/f=1/(2x10^-6)=0.5x10^-6second

                                                  =0.5µ second