Flow of a typical Instruction Word

Question

Briefly describe the flow of a typical Instruction Word?

Answer 1

The flow of a typical Instruction word is illustrated below:

• The content of the program counter of 2 byte is moved to the address register named as MAR (or memory address register). This incurs at the starting of a fetch cycle.
• The contents are moved through the address bus.
• Once this is done the control and timing part of the processor reads the contents of the referenced location of memory address.
• Henceforth the data is sent to the memory data register with the aid of the data bus.
• The data is situated in the instruction register that will eventually execute and decode it.