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controller
Last modified: Tuesday, September 07, 2004 

(k&n-tr;ōl´er) (n.) A device that controls the transfer of data from a computer to a peripheral device and vice versa. For example, disk drives, display screens, keyboards, and printers all require controllers.

In personal computers, the controllers are often single chips. When you purchase a computer, it comes with all the necessary controllers for standard components, such as the display screen, keyboard, and disk drives. If you attach additional devices, however, you may need to insert new controllers that come on expansion boards.

Controllers must be designed to communicate with the computer's expansion bus. There are three standard bus architectures for PCs -- the AT bus, PCI (Peripheral Component Interconnect), and SCSI. When you purchase a controller, therefore, you must ensure that it conforms to the bus architecture that your computer uses.

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For internet.com pages about controller . Also check out the following links!

Related Links

Keyboard Controller functions
Describes the functions of the keyboard controller and what functions it provides. This page is from "The PC Guide".

Microcontroller primer/FAQ
Contains general questions and answers about microcontrollers and embedded processors.

System Chipset and Controllers
Describes chipset functions and features, popular chipsets, controller and integrated motherboard functions. This page is from "The PC Guide".

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related categories

Integrated Circuits (ICs)

Peripheral Devices

related terms

adapter

AT bus

ATA

bus

cache coherence

chip

CPU

driver

EISA

expansion board

fabless

integrated peripheral

LLF

microcontroller

PC

PCI

peripheral device

printed circuit board

SAS

SCSI

silicon


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