Computer Organization: Control Unit Operation

What is the primary function of the control unit in a processor?

To generate control signals for micro-operations

What is the purpose of decomposing the functioning of the processor into elementary operations?

To break down complex operations into manageable micro-operations

What is the term for the fundamental operations that make up an instruction cycle?

Micro-operations

What are the two basic functions of the control unit?

Sequencing and execution Signup and view all the answers

What is the purpose of the instruction cycle?

To subdivide the instruction into smaller tasks Signup and view all the answers

What is an example of a micro-operation?

Transferring data between registers and external bus Signup and view all the answers

What is the primary function of the Control Unit in a computer system?

To transfer data to and from registers and operate the ALU Signup and view all the answers

What is the Hard-wired Implementation of the Control Unit?

A combinatorial circuit that generates output control signals Signup and view all the answers

What is the process of translating machine language instructions into lower-level control unit instructions called?

Microprogramming Signup and view all the answers

What is the purpose of the MAR in the fetch cycle?

To provide the address of the next instruction to be fetched Signup and view all the answers

What is the purpose of the Memory Address Register (MAR)?

To specify the address for read or write operations Signup and view all the answers

What happens to the PC during the fetch cycle?

It is incremented by the instruction length Signup and view all the answers

How many registers are involved in the Fetch Cycle?

4 Signup and view all the answers

What is the role of the MBR in the fetch cycle?

To temporarily hold the data from memory Signup and view all the answers

What is the purpose of the control unit issuing a READ command in the fetch cycle?

To read data from memory Signup and view all the answers

What occurs at the beginning of each instruction in the Fetch Cycle?

Fetch Cycle Signup and view all the answers

What happens to the contents of the MBR after the fetch cycle?

They are moved to the IR Signup and view all the answers

What is the sequence of events in the fetch cycle?

PC -> MAR -> MBR -> IR Signup and view all the answers