Texas Instruments 660 Benutzerhandbuch

                                                                                                              Theory of Operation

This section contains a general block diagram theory of operation description of the 
Extensa 660 Series Notebook Computers.

Note: Various internal components may change on future models and 
busses/bus speeds are subject to change.

The Extensa 660 Series Notebooks consist of eight major functions or sections 
including:

♦

System Processor — implemented on the System Board Assembly

♦

Memory Subsystem — implemented on the System Board Assembly

♦

I/O Subsystem — implemented on the I/O Board

♦

Keyboard Subsystem — implemented on the System Board Assembly and the 
Keyboard Assemblies

♦

Video Subsystem — implemented on the I/O Board, LED Board, and LCD 
Display Panel

♦

Sound Subsystem — implemented on the System Board Assembly.

♦

Glidepad Mouse Subsystem — implemented on the Glidepad assembly and on 
the System Board Assembly

♦

Hard Disk Drive Subsystem — implemented on the System Board Assembly 
and the Hard Disk Drive Assembly

♦

Floppy Disk Drive Subsystem — implemented on the System Board and Floppy 
Disk Drive Assembly

♦

PCMCIA Controller and Sockets — implemented on the System Board

♦

CD-ROM Subsystem — implemented on the System Board and the CD-ROM

♦

Power Subsystem — implemented on the Power Supply Board, Inverter Board, 
battery packs, and AC adapter