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Two I/O windows per socket
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Programmable card access cycle timing
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8- or 16-bit CPU interface
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8- or 16-bit PCMCIA interface support
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ATA disk interface support
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Automatic flash memory timing support
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Easy host interface using ISA I/O addresses 03E0h, 03E1h
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Mixed-voltage (3.3V or 5V) operation
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Dual-socket-interface, 208-pin QFP
4.2.8
Sound Subsystem (Model Dependent)
Some models of the Extensa 57x Series notebooks are equipped with a
16-bit stereo sound system including:
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Built-in microphone and stereo speakers
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Stereo line input (5-pin jack, DIP)
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Stereo Line Output (5-pin jack, DIP)
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External microphone input (5-pin jack, DIP)
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Audio chipset
The sound subsystem is physically implemented on the IR/Sound Board.
4.2.9
Power Subsystem
The Power Subsystem consists of the following major parts:
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Power Management (hardware and software components)
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AC Adapter
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Power Supply Board
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Nickel Metal Hydride (NiMH) Battery Pack
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Optional Secondary Battery Pack (Lithium Ion) if not using the Media
Bay for a floppy drive or CD-ROM Drive
4.2.9.1 Power Management
The notebook is equipped with a power management function that
minimizes battery usage for prolonged battery operation and automatically
recharges the batteries when the notebook is used with an AC adapter.
4-8
Theory of Operation