Intel Pentium 4 User Manual

System Bus Routing
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 87
5.6.1 Processor Power Delivery
Power must be distributed as a plane. This plane can be constructed as an island on a layer used
for other signals, on a supply plane with other power islands, or as a dedicated layer of the PCB.
Processor power should never be distributed by traces alone. Intel recommends that a minimum of
four planes be dedicated to power delivery in the power delivery area for Intel Pentium 4
processor system boards.
The voltage island from the source of power to the load should not have any breaks, so as to
minimize inductance in the plane. Also, it should completely surround all of the pins of the power
source and all of the pins in the power pin area of the Pentium 4 processor in the 478-pin package.
For more information about processor power delivery, please reference the Intel
®
Pentium
®
4
Processor in the 478 Pin Package and Intel
®
850 Chipset Design Guide.
Figure 54. Processor Power Delivery on Layer 2
Layer 2

Intel Pentium 4 Specifications

General

Brand	Intel
Model	Pentium 4
Category	Computer Hardware
Language	English