Table 75. Ddr Sdram Memory Supply Voltage And Current Specification - Intel 855PM Design Manual

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Table 75. DDR SDRAM Memory Supply Voltage and Current Specification

Name
Purpose
Specification Definition
Voltage Nominal (V)
Tolerance (±%)
Tolerance (±V)
Max Absolute Spec
Value (V)
Min Absolute Spec
Value (V)
MAX RELATIVE SPEC
(calculated from
measured "Vdd" value)
MIN RELATIVE SPEC
(calculated from
measured "Vdd" value)
Absolute Maximum
Current Requirements
(A)
®
Intel 855PM Chipset Platform Design Guide
"VDD" "VDDQ"
Core Supply I/O Supply Voltage,
Voltage, Static Static
VDD VDDQ
2.500
2.500
8.0% 8.0%
0.200 0.200
2.700 2.700
2.300 2.300
NA NA
NA NA
I (max) I (max)
DD DDQ
0.920
5.000
Platform Power Delivery Guidelines
"VREF"
I/O Reference Supply
Voltage, Static
VREF = (Vdd/2) ± 0.050 V ((2.5 V ± 8%)/2) ± 0.050 V
1.250
4.0%
0.050
1.400 ((2.5V + 8%)/2) + 0.050 V
1.100 ((2.5 V - 8%)/2) - 0.050 V
(measured Vdd/2) + 0.050
V
(measured Vdd/2) - 0.050
V
I (max)
REF
0.001 (1mA)
Description
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