Apple M9677LL iBook G4 Manual - Page 33

Understanding USB Devices and Battery Power, Using Multiple USB Devices at the Same Time

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Understanding USB Devices and Battery Power You can use USB devices, such as joysticks and keyboards, that get power from the iBook USB connection instead of from a separate power adapter. However, these types of USB devices can cause your iBook battery to become depleted faster. If you are using the device for an extended period, it is a good idea to connect the iBook power adapter. Using Multiple USB Devices at the Same Time You can purchase a USB hub to connect multiple USB devices to your computer. The USB hub connects to an open USB port on your computer and provides additional USB ports (usually four or seven). Hi-Speed hubs can support USB 2.0 Hi-Speed devices as well as USB 1.1 compatible devices. USB 1.1 hubs don't allow Hi-Speed USB devices to operate at their maximum data speed. Most USB hubs have a power adapter and should be plugged in to an outlet. Note: If you are using a chain of USB devices and hubs, some USB devices might not work when connected through a combination of USB 2.0 Hi-Speed hubs and USB 1.1 full-speed or low-speed hubs. For example, you might not see an external USB hard disk on your desktop. To avoid this problem, do not connect USB devices with different speeds together. Connect your Hi-Speed hub directly to your computer and connect Hi-Speed devices to it. Connect a full-speed or low-speed hub to your computer directly and connect similar speed devices to it. ® USB hub Chapter 3 Using Your iBook G4 33

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Chapter 3
Using Your iBook G4
33
Understanding USB Devices and Battery Power
You can use USB devices, such as joysticks and keyboards, that get power from the
iBook USB connection instead of from a separate power adapter. However, these types
of USB devices can cause your iBook battery to become depleted faster. If you are using
the device for an extended period, it is a good idea to connect the iBook power
adapter.
Using Multiple USB Devices at the Same Time
You can purchase a USB hub to connect multiple USB devices to your computer. The
USB hub connects to an open USB port on your computer and provides additional USB
ports (usually four or seven). Hi-Speed hubs can support USB 2.0 Hi-Speed devices as
well as USB 1.1 compatible devices. USB 1.1 hubs don’t allow Hi-Speed USB devices to
operate at their maximum data speed. Most USB hubs have a power adapter and
should be plugged in to an outlet.
Note:
If you are using a chain of USB devices and hubs, some USB devices might not
work when connected through a combination of USB 2.0 Hi-Speed hubs and USB 1.1
full-speed or low-speed hubs. For example, you might not see an external USB hard
disk on your desktop. To avoid this problem, do not connect USB devices with different
speeds together. Connect your Hi-Speed hub directly to your computer and connect
Hi-Speed devices to it. Connect a full-speed or low-speed hub to your computer
directly and connect similar speed devices to it.
®
USB hub