Compaq W4000 Manual De Usuario
Chapter 6 Power and Signal Distribution
6.3.2 LOW VOLTAGE PRODUCTION/DISTRIBUTION
Voltages less than 3.3 VDC including processor core (VccP) voltage are produced through
regulator circuitry (Figure 6-4) on the system board.
regulator circuitry (Figure 6-4) on the system board.
VccP (see text)
DDR
DIMMs
+3.3 VDC
+12 VDC
AGP Bus
VDDQ (1.5 VDC)
AGP
PWR
+5 VDC
+1.8 VDC
+1.4 Ref
2.5 S3 VDC
DDR
Power
Circuitry
+3 AUX
3.3 VDC
3.3
DIMM
Circuit
DIMMs
+5 AUX
+3.3 VDC
+5 VDC
Processor
VID0
VID1
VID2
VID3
VID4
+12 VDC
+12.8 Vcpu
Regulator
Circuit
Power Supply
Processor
igure 6–4. Low Voltage Supply and Distribution Diagram
ng of
gnals VID4..0 by the processor. The possible voltages available are listed as follows:
F
The VccP regulator produces the VccP (processor core) voltage according to the strappi
si
The VccP regulator produces the VccP (processor core) voltage according to the strappi
si
VID 4..0
VccP VID
4..0
VccP VID
4..0
VccP
00000
2.05 VDC
01011
1.50 VDC
10110
2.90 VDC
00001
2.00 VDC
01100
1.45 VDC
10111
2.80 VDC
00010
1.95 VDC
01101
1.40 VDC
11000
2.70 VDC
00011
1.90 VDC
01110
1.35 VDC
11001
2.60 VDC
00100
1.85 VDC
01111
1.30 VDC
11010
2.50 VDC
00101
1.80 VDC
10000
3.50 VDC
11011
2.40 VDC
00110
1.75 VDC
10001
3.40 VDC
11100
2.30 VDC
00111
1.70 VDC
10010
3.30 VDC
11101
2.20 VDC
01000
1.65 VDC
10011
3.20 VDC
11110
2.10 VDC
01001
1.60 VDC
10100
3.10 VDC
111
11
No CPU
01010
1.55 VDC
10101
3.00 VDC
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Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Featuring the Intel Pentium 4 Processor
Second Edition- January 2003
6-8