Compaq dc7100 HP Compaq dc71xx and dx61xx Series Business Desktop Computers Te - Page 144

Low Voltage Production/Distribution

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Power and Signal Distribution 7.3.2 Low Voltage Production/Distribution Auxiliary voltages less than 5 volts and all voltages less than 3.3 volts are produced through regulator circuitry (Figure 7-6) on the system board. Power Supply 5 Aux Power Supply Aux PWR 3.3 Aux DDR PWR 2.5 VDC 1.5 VDC 3.3 VDC 1.5 V Regulator 1.5 VDC DIMMs DIMMs DIMMs Chipset Power Supply Power Supply Processor 5 VDC 12 VDC VID 0-5 Regulator Circuit VccP 1.2 VDC Processor Processor Figure 7-6. Low Voltage Supply and Distribution Diagram The VccP regulator produces the VccP (processor core) voltage according to the strapping of signals VID0..5 by the processor and may range from 0.8375 to 1.6 VDC. 7-12 361834-002 Technical Reference Guide

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7-12
361834-002
Technical Reference Guide
Power and Signal Distribution
7.3.2 Low Voltage Production/Distribution
Auxiliary voltages less than 5 volts and all voltages less than 3.3 volts are produced through
regulator circuitry (Figure 7-6) on the system board.
Figure 7-6.
Low Voltage Supply and Distribution Diagram
The VccP regulator produces the VccP (processor core) voltage according to the strapping of
signals VID0..5 by the processor and may range from 0.8375 to 1.6 VDC.
Regulator
Circuit
Processor
Chipset
VccP
1.5 V
Regulator
DIMMs
DIMMs
Aux
DDR
5 Aux
PWR
PWR
3.3 Aux
2.5 VDC
1.5 VDC
3.3 VDC
VID 0-5
5 VDC
12 VDC
1.2 VDC
Processor
DIMMs
1.5 VDC
Power Supply
Power Supply
Power Supply
Power Supply
Processor