Usb And 1394 Devices; What Is Usb - HP Compaq Presario,Presario R4000 Hardware And Software Manual

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USB and 1394 Devices

What Is USB?

USB (Universal Serial Bus) is a hardware interface that can be
used to connect an external device such as a USB keyboard,
mouse, drive, printer, scanner, or hub to the notebook or an
optional docking device.
A hub is a connecting device that can be either powered or
unpowered. USB hubs can be connected to a USB port on the
notebook or to other USB hubs. Hubs support varying numbers of
USB devices and are used to increase the number of USB devices
in the system.
✎
Powered hubs must be connected to external power.
Unpowered hubs must be connected either to a USB port on the
notebook or to a port on a powered hub.
A USB device may require support software, which is usually
included along with installation instructions, with the device.
The 4 USB ports on the notebook support USB 2.0-compliant,
USB 1.1-compliant, and USB 1.0-compliant devices.
Hardware and Software Guide 9–1