Sound Subsystem (Model Dependent); Power Subsystem - Texas Instruments Extensa 570x Series Maintenance Manual

4.2.8
Some models of the Extensa 57x Series notebooks are equipped with a
16-bit stereo sound system including:
The sound subsystem is physically implemented on the IR/Sound Board.
4.2.9
The Power Subsystem consists of the following major parts:
4.2.9.1
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
Two I/O windows per socket
Programmable card access cycle timing
8- or 16-bit CPU interface
8- or 16-bit PCMCIA interface support
ATA disk interface support
Automatic flash memory timing support
Easy host interface using ISA I/O addresses 03E0h, 03E1h
Mixed-voltage (3.3V or 5V) operation
Dual-socket-interface, 208-pin QFP

Sound Subsystem (Model Dependent)

Built-in microphone and stereo speakers
Stereo line input (5-pin jack, DIP)
Stereo Line Output (5-pin jack, DIP)
External microphone input (5-pin jack, DIP)
Audio chipset

Power Subsystem

Power Management (hardware and software components)
AC Adapter
Power Supply Board
Nickel Metal Hydride (NiMH) Battery Pack
Optional Secondary Battery Pack (Lithium Ion) if not using the Media
Bay for a floppy drive or CD-ROM Drive
Power Management