control bus


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control bus

(architecture)
In a digital computer, the signal paths that carry commands from the instruction decode logic to various different functional units such as the ALU, memory address register, memory data register and other buffers.

Named by analogy with the address bus and data bus, each of which carries a set of related signals, the signals carried by the control bus are more independant.

Some might include other signals such as timing (clock) and status under the term, further reducing its similarity to other busses.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
References in periodicals archive ?
The GBT active surface control system transmits the antenna deformation information to the master computer via the control bus; the computer subsequently applies the correction data to the corresponding actuator through the control network and control bus to correct the antenna surface shape.
MBUS is defined as a control bus for functional register configuration [10].
Let {[x.sub.1i], [x.sub.2i],[x.sub.3i],....,[x.sub.ni]} and {[y.sub.1i],[y.sub.2i],[y.sub.3i],[y.sub.ni]} be a set of linguistic variables state just after disturbance(JAD) corresponding to a load control bus i, where [x.sub.1i] [x.sub.2i],[x.sub.3i],....
These functions are programmable through the serial camera control bus (SCCB) interface, the company said.
HIS nickname is Geoff "Buff" Hoon (get it?), but - after last week's U-turns on letting councils control bus services and high-speed - it is time to reassess his reputation.
* Processor on a control bus with local memories for programs (program load memory) and control structures (control memory).
So we must cope with Fieldbus, VMEFuturebus, Multibus, Standard Bus, Mod-bus, Bitbus, Serial Bus, Seriplex Control Bus, Genius I/O, Interbus-S, Sensoplex, DeviceNet, Universal Serial Bus, IEEE 1394 (Firewire), RS232, RS485, Lightbus, SERCO, Profibus (widely used in Europe), CEBus, LONWorks, Wor1dFIP, VMEbus/VXI, Compact PCI/PXI, PC/104, HPIB (IEEE-488), PLC Bus, CANbus and other buses as yet unheard of.
To help control bus congestion, a security officer boards each bus and assigns the driver a pickup point and time for the group to board for the return trip home.
LABOUR AM Huw Lewis has called on Westminster to grant the Assembly the power to control bus services.
The fastest SMUs combine a test sequencer with an on-board script processor and high-speed control bus that allows master-slave operation of multiple SMUs in a true parallel channel arrangement.
In the August 2006 Industry Focus article on Automotive Electronics, "Media Oriented Systems Transport (MOST[R]): A High-speed Multimedia and Control Bus," a caption accompanying an illustration states "System complexity increases exponentially when additional components are added;" and a statement in the text reads "As the number of devices in a car goes up, the number of connections required to control the system rises exponentially." Reader William Smith wrote to us: