12 Facts About Address bus

In computer architecture, a Address bus is a communication system that transfers data between components inside a computer, or between computers.

The Address bus connecting the CPU and memory is one of the defining characteristics of the system, and often referred to simply as the system Address bus.

The width of the address bus determines the amount of memory a system can address.

For example, a 32-bit address bus can be implemented by using 16 lines and sending the first half of the memory address, immediately followed by the second half memory address.

Memory Address bus is the Address bus which connects the main memory to the memory controller in computer systems.

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An attribute generally used to characterize a Address bus is that power is provided by the Address bus for the connected hardware.

Simplest system bus has completely separate input data lines, output data lines, and address lines.

Early microcomputer Address bus systems were essentially a passive backplane connected directly or through buffer amplifiers to the pins of the CPU.

Memory and other devices would be added to the bus using the same address and data pins as the CPU itself used, connected in parallel.

All the equipment on the Address bus had to talk at the same speed, as it shared a single clock.

Such Address bus systems are difficult to configure when constructed from common off-the-shelf equipment.

The result was that the Address bus speeds were now very much slower than what a modern system needed, and the machines were left starved for data.