System Management Bus

Computing Dictionary

System Management Bus definition

hardware, protocol
(SMBus, SMB) A simple two-wire bus used for communication with low-bandwidth devices on a motherboard, especially power related chips such as a laptop's rechargeable battery subsystem (see Smart Battery Data). Other devices might include temperature sensors and lid switches.
A device can provide manufacturer information, indicate its model/part number, save its state for a suspend event, report different types of errors, accept control parameters, and return status. The SMB is generally not user configurable or accessible.
The bus carries clock, data, and instructions and is based on Philip's I2C serial bus protocol. Support for SMBus devices is provided on Windows 2000. Windows 98 does not support such devices.
The PIIX4 chipset provides SMBus functionality. Vendors using SMBus would be required to pay royalties.
SMBus website (http://sbs-forum.org/smbus/).
Software to interrogate a SMB motherboard (http://online.de/home/podien/SMB.HTM).
SMB devices, Part 8 Kernel Mode Driver Design Guide, Win2000 DDK (http://microsoft.com/ddk/).
(1999-08-08)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
Cite This Source
Explore Dictionary.com
Previous Definition: system management
Next Definition: system management mode
More from Thesaurus.com
Synonyms and Antonyms for system management bus
More from Reference.com
Search for articles containing system management bus
Dictionary.com Word FAQs

Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature