Control Bus is a high-speed integrated circuit that is used to transmit control signals among the various parts of a computer system. It is one of the most important connections in a computer, as it is responsible for the communication between the processor and all other parts of the computer, such as memory, input/output (I/O) interfaces, and other hardware components.
A control bus is composed of multiple wires that run parallel to each other, alongside a single clock line. The control bus is often composed of three major components: an address bus, an instruction bus, and a status bus. The address bus carries memory addresses, while the instruction bus carries the instructions that the processor will use to execute a given task. Lastly, the status bus contains information about the status of the system, such as whether a specific piece of hardware is enabled.
Control buses are based on the bus architecture that was first developed by Intel Corporation in the early 1970s. Since then, the use of control buses has been expanded to a variety of computer systems, including Apple, IBM, and Sun Microsystems. They are commonly used in desktop computers, as well as embedded systems in various consumer electronics products such as DVD players, cell phones, and more.
Control buses are a vital component in computer systems as they are responsible for the communication between all of the components in the system. Without a control bus, a computer would be unable to execute the instructions, process the data, or access any of the peripheral devices. They are a key part of the architecture of any modern computer system.