1 Hardware Overview 1.2 System Unit Block Diagram
1-8 Satellite A40 Maintenance Manual (960-458)
The system unit is composed of the following major components:
q 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)
q 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
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