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 ?
Data Bus market worldwide is projected to grow by US$6 Billion, driven by a compounded growth of 4.5%.
The data is written to the ring buffer of the device and, when requested via the data bus, it can return both the last recorded value and the entire buffer.
SevOne Data Insight and SevOne Data Bus are available now, and SevOne Data Engine will ship later this year.
This report provides a detailed market analysis and forecast for the data bus market for the commercial & military aviation and automotive industries.
"We plug in the VICTORY data bus into that to pull that information off and to give it to maintainers and to people in the vehicle itself," he said, "If you're a commander of a truck and your left front tire is about to pop because it's too hot, before it does so, that condition based maintenance routine will identify that as a concern to the commander and they'll make it available onto his display at that moment."
These techniques keep track of some of the previous transmitted data using a small cache on both sides of the data bus. Compression techniques reduce the number of wire lines contributing a reduction on in area overhead and an increase in the bus bandwidth.
This is especially helpful when a target system has a data bus lock up or hang to a fixed data value while the clock continues to run.
(SSO is typically ignored altogether.) This kind of divide-and-conquer approach worked well when the margins were relatively large, but the margins on a modern 1.6 Gbps DDR3 data bus are substantially different from those of the 333 Mbps DDR data buses of yesteryear, when those techniques were commonly deployed.
It included dual integer pipelines, a faster FPU, wider data bus, separate code and data caches and features for further reduced address calculation latency
The gauge also rounds out the DDBI line for a complete data bus gauge panel assembly."
Both units harness the power of SimNet, Simrad's NMEA 20O0[R]-based data bus, which simplifies installation and integration with other marine electronics.
For larger systems, the grease meters are connected over a data bus to a computer that offers advanced statistical and logging functions.