Low Voltage Production/Distribution - HP Compaq d330 DT Technical Reference Manual

Chapter 7 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 7-5) on the system board.
+5 AUX
Power Supply
+3.3 VDC
Processor
F igure 7-5. Low Voltage Supply and Distribution Diagram
The VccP regulator produces the VccP (processor core) voltage according to the strappi
si gnals VID4..0 by the processor. The possible voltages available are listed as follows:
VID 4..0
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
7-10 hp compaq d330 and d530 Series of Personal Computers
Featuring the Intel Pentium 4 Processor
+3.3
Auxiliar y
Circuit
1.5
Regulator
Circuit
+5 VDC
+12 VDC
VID0
VID1
VID2
VID3
VID4
VccP VID 4..0
2.05 VDC 01011
2.00 VDC 01100
1.95 VDC 01101
1.90 VDC 01110
1.85 VDC 01111
1.80 VDC 10000
1.75 VDC 10001
1.70 VDC 10010
1.65 VDC 10011
1.60 VDC 10100
1.55 VDC 10101
First Edition - June 2003
1.5
3.3 AUX
Auxiliar y
Circuit
DDR
3.3 AUX
S3 PW R
+1.25 VDC
Circuit
+1.5 VDC
+12 VDC
VccP (see text)
Regulator
Circuit
VccP VID 4..0
1.50 VDC 10110
1.45 VDC 10111
1.40 VDC 11000
1.35 VDC 11001
1.30 VDC 11010
3.50 VDC 11011
3.40 VDC 11100
3.30 VDC 11101
3.20 VDC 11110
3.10 VDC 111 11
3.00 VDC --
3.3 AUX
DIMMs
1.5 AUX
Chipset
2.5 VDC
DDR DIMMs
AGP bus, Chipset
Processor
1.2 VDC
ng of
VccP
2.90 VDC
2.80 VDC
2.70 VDC
2.60 VDC
2.50 VDC
2.40 VDC
2.30 VDC
2.20 VDC
2.10 VDC
No CPU
--