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SMBUS(4)	       FreeBSD Kernel Interfaces Manual		      SMBUS(4)

NAME
     smbus -- System Management	Bus

SYNOPSIS
     device smbus

     device iicsmb
     device bktr

DESCRIPTION
     The smbus system provides a uniform, modular and architecture-independent
     system for	the implementation of drivers to control various SMB devices
     and to utilize different SMB controllers (I2C, PIIX4, Brooktree848,
     vm86...).

System Management Bus
     The System	Management Bus is a two-wire interface through which simple
     power-related chips can communicate with rest of the system.  It uses I2C
     as	its backbone (see iicbus(4)).

     A system using SMB	passes messages	to and from devices instead of trip-
     ping individual control lines.

     With the SMBus, a device can provide manufacturer information, tell the
     system what its model/part	number is, save	its state for a	suspend	event,
     report different types of errors, accept control parameters, and return
     its status.

     The SMBus may share the same host device and physical bus as ACCESS bus
     components	provided that an appropriate electrical	bridge is provided
     between the internal SMB devices and external ACCESS bus devices.

SEE ALSO
     bktr(4), iicbus(4), iicsmb(4), smb(4)

HISTORY
     The smbus manual page first appeared in FreeBSD 3.0.

AUTHORS
     This manual page was written by Nicolas Souchu.

FreeBSD	9.3			August 10, 1998			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | System Management Bus | SEE ALSO | HISTORY | AUTHORS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=smbus&sektion=4&manpath=FreeBSD+4.8-RELEASE>

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