No.34939
作者：mountain123
邮件：swallow_txy@163.com
ID：13143
登陆：8次
文章数：5篇
最后登陆IP：61.144.181.145
最后登陆：2003/8/10 18:43:08
注册：2003/6/19 8:09:40
财富：121
发帖时间：2003/6/19 8:51:08
发贴者IP：218.17.120.119
标题：mountain123:新东西！！！
摘要：No.34939新东西！！！ 哪位高手对SMBUS的程序模块开发有兴趣，肯出手的话，我可以提供有关资料。
1. What is System Management Bus?
The System Management Bus (SMBus) is a two-wire interface through which simple system and power
management related chips can communicate with the rest of the system. It is based on the principals of
operation of I²C.
SMBus provides a control bus for system and power management related tasks. A system using SMBus
passes messages to and from devices instead of tripping individual control lines. Removing the individual
control lines reduces pin count. Accepting messages ensures future expandability.
With System Management Bus, 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 System Management Bus may share the same host device and physical bus with I²C components
provided that the electrical and timing specifications of this document are adhered to.
Intel conceived the System Management Bus originally, as the communication bus to accommodate Smart
Batteries and other system and power management components. In 1994 SMBus became part of the Onboard
ACCESS.bus specifications. In January 1995 Philips announced in New York the royalty free status
of ACCESS.bus devices including On-board ACCESS.bus compliant devices. In 1996 the Smart Battery
System specifications were handed by Intel and Duracell to a group of 10 companies that formed the core
group of the SBS. In 1997 the SBS Implementers Forum was formed and SMBus became part of the
specifications handled by this group. The same year SMBus was incorporated into the ACPI specifications
as the bus ......
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