System Installation
ROBO-8777VG2A User’s Manual
3-8
Definitions of Variables:
Value of
Count-mode Register
:
1) 0x00 -- Count down in seconds (Bit3=0)
2) 0x08 -- Count down in minutes (Bit3=1)
Value of
Time-out Value Register
:
1) 0x00 -- Time-out Disable
2) 0x01~0xFF -- Value for counting down
3.6 SMBus
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.
A system using SMBus 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
interal SMB devices and external ACCESS bus devices.
3.7
On-Board USB 2.0 Controller
Drivers Support
Please find Intel
®
ICH8 USB driver in /USB20 directory of ROBO-8777VG2A CD-
title.
The drivers support Windows-2000/XP.
