Battery; Speaker; Fan Connectors; Usb Interface Support - Intel PD440FX Product Manual

Battery

A battery on the motherboard keeps the clock
and values in CMOS RAM current when your
computer is turned off. To replace the battery,
see Chapter 3.

Speaker

An optional speaker is mounted on the
motherboard. The speaker provides audible
error code information (beep codes) during the
POST if the BIOS cannot use the video
interface. For beep code descriptions, see
Chapter 4.
The board also has a connector for an
enables the onboard speaker (refer to
Chapter 5).
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Fan Connectors

The motherboard has connectors for two fans.
For the locations and pinouts of the fan
connectors, see Chapter 5.

USB Interface Support

The USB ports permit the direct connection of
two USB peripherals without an external hub. If
more devices are required, an external hub can
be connected to either of the built-in ports. The
motherboard supports the standard universal
host controller interface (UHCI) and uses
standard software drivers that are UHCI-
compatible.
Features of the USB include:
Support for self-identifying, hot-pluggable
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peripherals
Automatic device configuration
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Support for isochronous and asynchronous
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transfers over the same set of wires
Support for up to 127 physical devices
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Bandwidth and low latencies appropriate for
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telephony, audio, and other applications
Error handling and fault recovery built into
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protocol