data bus


Also found in: Acronyms.

data bus

[′dad·ə ‚bəs]
(electronics)
An internal channel that carries data between a computer's central processing unit and its random-access memory.

data bus

(architecture)
The bus (connections between and within the CPU, memory, and peripherals) used to carry data. Other connections are the address bus and control signals.

The width and clock rate of the data bus determine its data rate (the number of bytes per second it can carry), which is one of the main factors determining the processing power of a computer. Most current processor designs use a 32-bit bus, meaning that 32 bits of data can be transferred at once. Some processors have an internal data bus which is wider than their external bus in order to make external connections cheaper while retaining some of the benefits in processing power of a wider bus.

See also data path.

data bus

An internal pathway across which data are transferred to and from the processor or to and from memory. See local bus, system bus and peripheral bus.
References in periodicals archive ?
This report provides a detailed market analysis and forecast for the data bus market for the commercial & military aviation and automotive industries.
This Data Bus product line includes National Hybrid-brand products and UK-made MIL- STD-1553 and MIL-STD-1760 products.
Signals are read, conditioned and converted to the standardized format before being transmitted to the data bus.
Vehicle Monitor Corporation, a world-leading developer of vehicle data bus technology, has worked with Planar for over ten years on a variety of projects, including excavators, forklifts, and mining equipment, as well as the Vehicle Information Profiler for Mack Truck.
Serial ATA alleviates many of these problems by transitioning to a serial data bus.
The Data Bus product line comprise of National Hybrid-brand products and UK-made MIL-STD-1553 and MIL-STD-1760 products.
Ametek Dixson has expanded its precision instrumentation and cluster product lines to include a Data Bus Compass Module that is an accurate sender unit featuring a built-in two-axis magnetic sensor that converts the data to a 360-degree value broadcast over an SAE J1587/J1708 vehicle data bus.
The devices conform to the SigmaRAM Consortium's Sigma 1x1Dp double-late-write, pipeline-read specification, which enables 100 percent data bus efficiency and avoids data bus collision even in read/write alternate operation.
The InfoTrak 2000 data bus gauge system, introduced at the SAE Truck & Bus Show in Cleveland, is targeted at a variety of applications, including heavy-duty trucks, industrial and marine equipment, or any other machines that utilize J1708/J1587 communications.
More importantly, Audavi's unique 50-pin SCSI bay provides a plug compatible interface to the existing legacy narrow SCSI data bus, so that no additional hardware or software changes are required.
Both ONFI and Toggle versions support single-channel operations in x8 and x16 data bus widths, and dual- and quad-channel operations in x8 bit data bus width, which allows operations of up to 400 million transactions per second.