Texas Instruments 1 Manuel D’Utilisation
Theory of Operation
4-1
4
Theory of Operation
4.1 Introduction
This section contains a general block diagram theory of operation description of the
Extensa 900 Series Notebook Computers.
Extensa 900 Series Notebook Computers.
Note: Various internal components may change on future models and
busses/bus speeds are subject to change.
busses/bus speeds are subject to change.
4.2 Notebook Functional Overview
The Extensa 900 Series Notebooks consist of eight major functions or sections
including:
including:
♦
System Processor — implemented on the Main Board Assembly
♦
Memory Subsystem — implemented on the Main Board Assembly
♦
I/O Subsystem — implemented on the Main Board Board
♦
Keyboard Subsystem — implemented on the Main Board Assembly and the
Keyboard Assembly
Keyboard Assembly
♦
Video Subsystem — implemented on the Main Board and LCD Display Panel
assemblies
assemblies
♦
Sound Subsystem — implemented on the Main Board Assembly
♦
Touchpad Mouse Subsystem — implemented on the Touchpad assembly and
on the Main Board Assembly
on the Main Board Assembly
♦
Hard Disk Drive Subsystem — implemented on the Main Board Assembly and
the Hard Disk Drive Assembly
the Hard Disk Drive Assembly
♦
Floppy Disk Drive Subsystem — implemented on the Main Board Board and
Floppy Disk Drive Assembly
Floppy Disk Drive Assembly
♦
PCMCIA Controller and Sockets — implemented on the PCMCIA Module and
on the Main Board
on the Main Board
♦
Power Subsystem — implemented on the Main Board, the battery pack, and
the AC adapter
the AC adapter