Each instruction requires specific time for the execution of instruction and this time is called instruction cycle. Each instruction cycle consists 1 to 5 machine cycle -- opcode fetch, memory read, memory write, IO read, IO write and each machine cycle consist 3 to 6 T - states. Time required to execute 1 T-state = 1/ operating frequency of 8085 Microprocessor for example operating frequency = 2MHz then time required to execute 1 T-state = 0.5 uSec example: Calculate time required to execute instruction MOV C, A sol: This instruction has one machine cycle i.e. opcode fetch (In any instruction 1st cycle is always opcode fetch and opcode fetch consists 4 to 6 T state depend on the operation of particular instruction) so to execute MOV C, A required 4T states so time required to execute this instruction is 4*0.5usec = 2usec any other queries pls contect: nileshbahadure2000@Yahoo.co.in example:Calculate the time required to execute LXI H,2000H sol:Here we have to draw opcode fetch and two memory reads as two bytes 00H and 20H have to be read from memory. i.e, opcode fetch+Memory reads *2(bytes address) =4+3+3 so to execute LXI H,2000H,the required T-states is 10T and time is 10*0.5usec=5usec
Timing diagram of instructions in 8085
timing diagram of 8051
In computing - a flow diagram helps the programmer to see that each instruction and branch works correctly.
Apprentice
With necessary diagram, explain how MYCINES works.
A diagram that shows how seafloor spreading works.
With the aid of a diagram,illustrate how the c plus plus compiler works?
The ideo behind the manual Classroom Instruction That Works is to provide teachers and future teacher a basic guideline for activities to use in the classroom.
You will find the diagram on the website called "How stuff works"
This site does not support diagrams.
A diagram.
Venn Diagram
If a person works on a car, it is important to have a diagram. A belt diagram can be found on the inside of the hood, or in a maintenance books.
http://auto.howstuffworks.com/clutch.htm