What type of bus carries data or instruction codes into or out of the microprocessor?

The data bus is specifically designed to transfer data and instruction codes to and from the microprocessor. It is capable of carrying multiple bits of data at once, which allows for efficient communication between the microprocessor and other components within the computer system. This mechanism is crucial for processes such as reading from memory, writing to memory, and executing instructions, as the data bus ensures that the necessary information is transferred at the appropriate times.

By contrast, the control bus is responsible for transmitting control signals that manage the operations of the computer system, while the address bus is concerned with routing data to specific memory locations. The peripheral bus typically connects external devices to the computer's central processing unit and memory but does not specifically handle data and instruction codes to and from the microprocessor itself. This distinction highlights the data bus's fundamental role in facilitating data flow during processing tasks.