Control bus

A control bus is (part of) a computer bus, used by CPUs for communicating with other devices within the computer. While the address bus carries the information on which device the CPU is communicating with and the data bus carries the actual data being processed, the control bus carries commands from the CPU and returns status signals from the devices, for example if the data is being read or written to the device the appropriate line (read or write) will be active (logic zero).

Lines

The number and type of lines in a control bus varies but there are basic lines common to all microprocessors, such as:

• Read ($\overline R$). A single line that when active (logic zero) indicates the device is being read by the CPU. As opposed to a write operation where data goes from the CPU to memory (or an i/o device).
• Perform a hard reboot.

External links

• Definition by Webopedia.
• Computer system organization at the University of California, Riverside.

This computer hardware article is a stub. You can help Wikipedia by expanding it.v · Categories: Computer hardware stubs Computer buses Wikimedia Foundation. 2010. Игры ⚽ Поможем написать реферат La'Keshia Frett The Sea Look at other dictionaries: Control Bus —   [engl.], Steuerbus …   Universal-Lexikon control bus — valdymo magistralė statusas T sritis automatika atitikmenys: angl. control bus vok. Steuerbus, m rus. управляющая шина, f pranc. bus de commande, m …   Automatikos terminų žodynas control bus — valdymo magistralė statusas T sritis informatika apibrėžtis ↑Magistralė (2) valdymo signalams (komandoms, įtaisų būsenoms ir kitai su valdymu susijusiai informacijai) tarp kompiuterio centrinio procesoriaus ir kitų įtaisų perduoti. atitikmenys:… …   Enciklopedinis kompiuterijos žodynas Digital Control Bus — (parfois Digital Connection Bus[1] ou Digital Communication Bus[2]) est un type d interface utilisé sur certains instruments de musique électronique. C est une interface propriétaire développée par la société Roland Corporation en 1981[3]. Elle… …   Wikipédia en Français Digital Control Bus — DCB (Digital Control Bus, Digital Connection Bus[1] or Digital Communication Bus[2][3] in some sources) was a proprietary data interchange interface by Roland Corporation, developed in 1981[3] and introduced in 1982 in their Roland Juno 60 and… …   Wikipedia Bus mastering — Saltar a navegación, búsqueda En informática, Bus mastering es una característica soportada por muchas arquitecturas de bus que permite a un dispositivo conectado al bus para iniciar operaciones. También llamada First party DMA (Primera Parte del …   Wikipedia Español Bus (computing) — 4 PCI Express bus card slots (from top to bottom: x4, x16, x1 and x16), compared to a 32 bit conventional PCI bus card slot (very bottom) In computer architecture, a bus is a subsystem that transfers data between components inside a computer, or… …   Wikipedia bus —    An electronic pathway along which signals are sent from one part of a computer to another. A PC contains several buses, each used for a different purpose:    • The address bus allocates memory addresses.    • The data bus carries data between… …   Dictionary of networking bus de commande — valdymo magistralė statusas T sritis automatika atitikmenys: angl. control bus vok. Steuerbus, m rus. управляющая шина, f pranc. bus de commande, m …   Automatikos terminų žodynas Bus de direcciones — Saltar a navegación, búsqueda El bus de dirección (o direcciones) es un canal del microprocesador totalmente independiente al bus de datos donde se establece la dirección de memoria del dato en tránsito. El bus de dirección consiste en el… …   Wikipedia Español 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”