System management bus



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)

Tagged:

Read Also:

  • System management mode

    hardware (SMM) A reduced power consumption state provided by some Intel microprocessors. When a CPU enters SMM it saves its current state in a special area of static RAM called SMRAM (System Management RAM) and then runs a program, also stored in SMRAM, the SMM handler. SMM is implemented in all Intel “SL” suffixed CPUs. […]

  • System manager

    system management



  • System mangler

    humour A humorous synonym for “system manager”, possibly from the fact that one major IBM operating system had a root account called SYSMANGR. The term refers specifically to a systems programmer in charge of administration, software maintenance, and updates at some site. Unlike admin, this term emphasises the technical end of the skills involved. [Jargon […]

  • System-operator

    or systems operator noun 1. a person who maintains a computer system or network, especially one who operates a computer bulletin board.



Disclaimer: System management bus definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.