Mobile Intel Pentium 4 Processor - M and Intel 845MP/MZ Chipset Platform Design Guide

Mobile Intel
®
Pentium
®
4 Processor-M and Intel
®
845MP/845MZ Chipset Platform
176 Design Guide
R
Table 62. MCH-M DDR Voltage and Current Specifications
Name "VCCSM" "SDREF" "Vtt"= "SMRCOMP" Description
PURPOSE MCH-M
DDR
SUPPLY
VOLTAGE
(I/O),
STATIC
MCH-M REFERENCE
SUPPLY VOLTAGE,
STATIC
SMRCOMP
TERMINATION SUPPLY
VOLTAGE, STATIC
DEFINITION VCCSM SDREF=(VCCSM/2)
±2%
Vtt = ("Vref")+/-0.040V (((2.5 V+/-8%)/2)+/-
0.050 V)+/-0.040)
VOLTAGE
Nominal (V)
2.500 1.250 1.250
TOLERANCE (±%) 5.0% 2.0% 3.2%
TOLERANCE (±V) 0.125 0.025 0.040
MAX ABSOLUTE
SPEC VALUE (V)
2.625 1.339 1.440 (((2.5 V+8%)/2) +
0.050 V)+0.040)
MIN ABSOLUTE
SPEC VALUE (V)
2.375 1.164 1.060 (((2.5 V-8%)/2) -0.050
V)-0.040)
MAX RELATIVE
SPEC (calculated
from measured
"VCCSM" value)
na (measuredVCCSM/2)+
2%
(measured Vref)+0.04V
MIN RELATIVE
SPEC (calculated
from measured
"VCCSM" value)
na (measuredVCCSM/2) -
2%
(measured Vref)-0.040V
Ivccsm
(max)
Isdref (max) Ittrc (max)
ABSOLUTE
MAXIMUM
CURRENT
REQUIREMENTS
1.900 0.010 0.040