USB KEYBOARD USER'S GUIDE
Product Overview
This document describes the functional specification of standard
USB
keyboard and standard
USB
Hub
keyboard. Its function is fully compatible with the
U
niversal
S
erial
B
us Specification Revision
1.1 as well as the
H
uman
I
nterface
D
evices (HID) class specification 1.1.
The
USB Hub
keyboard processes the keyboard input and interconnects with two or more
downstream ports, which are for other USB devices to attach.
The chip in the
USB Hub
keyboard is a USB target device application, which follows the
HUB
specification in Chapter 11 and
USB Device Framework
defined in Chapter 9 of the USB
Specification 1.1. It supports the device states of Attached, Powered, Default, Address, Configured
and Suspended, Error recovery.
The
USB
Hub
keyboard is a "high power, bus-powered device" instead of "self-powered device",
that is the electrical power of this keyboard is supplied by the computer host, not by itself.
USB Interface Features:
USB is a "must-have" feature in the current market.
The instant way to expand your PC. You never to open your PC and you don't need to worry
about add-in cards, DIP switch setting or IRQs.
"Hot-swapping" feature: You don't even need to shut down and restart your PC to attach or
remove a peripheral. Just plug it in and go!
USB Hubs have additional ports that let you "daisychain" multiple devices together.
Technically, you can connect up to 127 individual USB peripherals at one time in a PC
system, such as: a digital joy-stick, a scanner, a set of digital speakers, a digital camera, a PC
telephone, etc.
The ACPI Power Management Keys and Their Functions
System requirement:
Microsoft
Windows
98 operating system.
The system supporting ACPI or APMII.
ATX motherboard and ATX power supply.
The functions of the power management are specified and performed by Windows
98 operating
system, no vendor-specified driver is needed to use them, but the Windows
98 operating system is
necessary. There could be one or two or three ACPI power management keys on the keyboard,
those functions are as follows.
Power off
key:
Power down the system.
Sleep
key:
Put the system to sleep.
Wake up
key:
Wake up or powers up the system.
Power
key:
(Single key with three functions above)
Press this key and hold over four seconds to power down the system.
Press this key and release it within four seconds to put the system to sleep.
When the system is asleep or powered down, press this key and release it within four
seconds to wake up or power up the system.
