data bus

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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.

(architecture)

data bus - 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.

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? References in periodicals archive

Bus Design: The latest revision of the ATA specification, ATA/ATAPI-6 where Ultra ATA 100 is defined, maintains backward compatibility with all previous ATA revisions, using the standard 16-bit, wide, parallel data bus and 16 control signals across a 40-pin connector.

Serial ATA: a comparison with Ultra ATA technology. (Serial ATA) by Cavin, Rob / Computer Technology Review

The new 4Gb/s graphics memory, offered in 512Mb density, has a 32-bit data bus configuration.

Samsung Speeds Up World's Fastest Graphics Memory by Business Wire

Also, in order to optimize data transfer between the CPU and MCP, Toshiba has adapted a "triple- data bus system" which consists of a high speed bus (for SDRAM and NOR), a middle speed bus (for SRAM and NOR) and NAND bus.

Toshiba develops Multi-Chip Package (MCP) which realizes stacking of ... by EDP Weekly's IT Monitor

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