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HP OmniBook 2100/3000/3100 Product Information 1-15
Table 1-13. Functional Structure
Function Modules Roles
Bootup
CPU module
Motherboard
System BIOS IC**
Keyboard BIOS IC**
Floppy disk drive
Hard disk drive
Main processor (MMO).
Primary system circuitry.
Code for basic system functions.
Code for keyboard functions.
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
RAM boards
First 16 MB (OmniBook 3000) or 32 MB (OmniBook 2100/3100) of
RAM, video RAM.
Optional, additional RAM.
Power
Battery
Motherboard
AC adapter
Icon PCA
Power storage.
Power supply, ac adapter socket, system-off switch.
AC-to-dc converter.
Power switch, lid switch.
Display
Motherboard
LCD module
LVDS PCA*
Inverter PCA
Display/graphics controller, video RAM.
Display output, backlight.
Display drivers, signal processing. (Low-voltage differential signaling)
Power converter for backlight.
Hard disk
Motherboard
Hard disk drive
Hard disk controller.
Hard disk mechanism.
Floppy drive
Motherboard
Floppy disk drive
Floppy disk controller.
Floppy disk mechanism.
Keyboard
Motherboard
Keyboard BIOS IC**
Keyboard
Keyboard controller.
Keyboard BIOS.
Key switches.
Touch pad
Motherboard
Top case
Keyboard and PS/2 controller.
Touch pad PS/2 device.
Audio
Motherboard
Audio PCA
Top case
Speaker amplifier, external audio jacks.
Audio controller, wave synthesizer, headphone amplifier.
Microphone, speakers.
Serial
Motherboard I/O controller, serial connector.
Parallel
Motherboard I/O controller, parallel connector.
Infrared
Motherboard
IR PCA
Icon PCA
I/O controller.
Infrared transmitter/receiver.
Pass-through connection.
PS/2 port
Motherboard Keyboard and PS/2 controller, PS/2 connector.
USB
Motherboard
USB PCA
I/O controller.
USB power controller, USB connector.
Docking port
Motherboard Docking logic, docking connector.
PCMCIA
Motherboard PCMCIA controller, PCMCIA connectors.
* The LVDS PCA is not present in products with 12-inch displays. In these products, the LVDS functions are
performed by the LCD module.
** The BIOS IC on the OmniBook 2100/3100 performs both system and keyboard BIOS functions.