Flow of a typical Instruction Word - 8085

Explain the flow of a typical Instruction Word.

The flow of a typical Instruction word is as follows:

- The content of the program counter of 2 byte is transferred to the address register known as MAR ( memory address register ). This occurs at the starting of a fetch cycle.

- The contents are transferred via the address bus.

- Once this is done the timing and control section of the processor reads the contents of the referenced memory address location.

- After this the data is sent to the memory data register with the help of the data bus.

- Now the data is placed in the instruction register which will eventually decode and execute it.
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