Toshiba A40 manual System Unit Block Diagram Hardware Overview

1.2 System Unit Block Diagram 1 Hardware Overview

The system unit is composed of the following major components:

‰Processor

Intel Mobile Pentium 4 Processor (Northwood)

•2.40/2.66/2.80/3.06/3.20GHz (Internal clock: 2.40/2.66/2.80/3.06/3.20GHz,

Bus: 533MHz, Core voltage: 1.525/1.20V (Battery Optimized Mode at 1.20V), Built-in NDP)

•Internal cache memory: 12KB (in CPU)

•Secondary cache memory: 512KB (in CPU)

Intel Mobile Pentium 4 Processor (Prescott)

•2.66/2.80/3.06/3.20/3.46GHz (Internal clock: 2.66/2.80/3.06/3.20/3.46GHz,

Bus: 533MHz, Core voltage: 1.35/1.15V (Battery Optimized Mode at 1.15V), Built-in NDP)

•Internal cache memory: 12KB (in CPU)

•Secondary cache memory: 1024KB (in CPU)

Intel Mobile Celeron

•2.40/2.50/2.60/2.70/2.80GHz (Internal clock: 2.40/2.50/2.60/2.70/2.80GHz,

Bus: 400MHz, Core voltage: 1.525V, Built-in NDP)

•Internal cache memory: 12KB (in CPU)

•Secondary cache memory: 128KB (in CPU)

‰Memory

Two memory slots are provided. Expansion up to 2GB is available.

•Supports DDR333

•Supports PC2700

–256MB: 256Mbit (16M ⋅ 16bit) chips ⋅ 8

–512MB: 512Mbit (32M ⋅ 8bit) chips ⋅ 16

–512Mbit (32M ⋅ 16bit) chips ⋅ 8

– 1GB: 512Mbit (64M ⋅ 8 bit) chips ⋅ 16

•200 pin, SO Dual In-line Memory Modules (SO-DIMM)

•2.5 volt operation

Satellite A40 Maintenance Manual (960-458) 1-7