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smbus(4) [freebsd man page]

SMBUS(4)						   BSD 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 tripping 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) The SMBus specification, http://www.smbus.org/specs/. HISTORY
The smbus manual page first appeared in FreeBSD 3.0. AUTHORS
This manual page was written by Nicolas Souchu. BSD
August 10, 1998 BSD

Check Out this Related Man Page

smbus(7D)							      Devices								 smbus(7D)

NAME
smbus - System Management Bus controller driver DESCRIPTION
The smbus driver is a I2C (Inter IC) nexus driver that allows the system to communicate with various system component chips. SMBus is a two-wire control bus based on the I2C protocol through which systems can communicate with various I2C devices connected to the bus. The smbus driver supports byte and block level transfer based on interrupt and polled mode. FILES
/platform/sun4u/kernel/drv/sparcv9/smbus 64 bit ELF kernel module ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcarx | +-----------------------------+-----------------------------+ |Architecture |SPARC | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) Writing Device Drivers System Management Bus (SMBus) Specification 2.0 -- SBS Implementation Forum The I2C Bus and How To Use It --Philips Semiconductor Document # 98-8080-575-01 SunOS 5.11 23 July 2003 smbus(7D)

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