HP OmniBook XE3 Product Information 1-19
Table 1-1. Functional Structure
Function Components Used Component Roles
Bootup CPU module
Motherboard
Floppy disk module
Hard disk drive
Main processor.
Primary system circuitry.
First source of disk-based startup code.
Second source of disk-based startup code.
Processor CPU module
Motherboard
Main processor, numeric data processor, L1 and L2 cache.
Primary system circuitry.
Memory Motherboard
SDRAM module
Video PCA
No onboard RAM.
Changeable RAM (2 slots).
Video RAM.
Power Battery
Motherboard
Switchboard PCA
AC adapter
Power storage.
Power control circuitry, AC adapter socket, lid switch, system-off switch,
power supply.
Power button, standby button.
AC-to-DC converter.
Display Motherboard
Display assembly
Video PCA
Video controller.
Display output, backlight, power converter for backlight.
Display drivers, LVDS processing, display/graphics controller, video
RAM.
Hard disk Motherboard
Hard disk drive
Hard disk controller.
Hard disk mechanism.
Floppy drive Motherboard
Floppy disk module
I/O controller, floppy connector.
Floppy disk mechanism.
Keyboard Motherboard
Keyboard
Keyboard controller, keyboard BIOS.
Key switches.
Touch pad Motherboard
Top case
Keyboard BIOS.
Touch pad sensor, click buttons, controller (PS/2 output).
Audio Motherboard
Switchboard PCA
Headphone PCA
Top case
Audio controller, audio decoder, speaker amplifier, external microphone
jack.
Microphone.
Earphone amplifier.
Speakers.
Status Motherboard
Switchboard PCA
CD player PCA
LED circuitry, keyboard controller.
Status LEDs.
CD-ROM/DVD status display.
Serial Motherboard I/O controller, serial connector.
Parallel Motherboard I/O controller, parallel connector.
Infrared Motherboard I/O controller, infrared transmitter/receiver.
PS/2 port Motherboard Keyboard controller, PS/2 connector.
USB Motherboard Bus controller, USB connectors.
Docking port Motherboard Docking logic, docking connector.
PCMCIA Motherboard
PCMCIA sockets
PCMCIA controller.
PCMCIA connectors.
