Datasheet

Datasheet 281
Electrical Characteristics
11.2 Current Consumption
Table 24 shows the current consumption for the MCH in the Advanced Configuration
and Power Interface (ACPI) S0 state. Icc max values are determined on a per-interface
basis, at the highest frequencies for each interface. Sustained current values or Max
current values cannot occur simultaneously on all interfaces. Sustained Values are
measured sustained RMS maximum current consumption and includes leakage
estimates. The measurements are made with fast silicon at 96° C Tcase temperature,
at the Max voltage listed in Table 26. The Max values are maximum theoretical pre-
silicon calculated values. In some cases, the Sustained measured values have exceeded
the Max theoretical values.
NOTES:
1. Measurements are for current coming through chipset’s supply pins.
2. Rail includes DLLs (and FSB sense amps on VCC).
3. Sustained Measurements are combined because one voltage regulator on the platform
supplies both rails on the MCH.
Table 24. Current Consumption in S0
Symbol Parameter Signal Names Sustained Max Unit Notes
I
VCC
1.25 V Core Supply Current (Discrete
Gfx)
VCC 6.06 7.27 A 1,2
I
VCC_DDR2
DDR2 System Memory Interface
(1.8 V) Supply Current
VCC_DDR 2.06 2.57 A
1, 2, 3
I
VCC_CKDDR2
DDR2 System Memory Clock Interface
(1.8 V) Supply Current
VCC_CKDDR 521 581 mA
I
VCC_EXP
1.25 V PCI Express* and DMI Supply
Current
VCC_EXP 5.12 6.65 A 2
I
VCC_CL
1.25 V Controller Supply Current VCC_CL 2.20 2.80 A 2
I
VTT_FSB
System Bus Supply Current VTT_FSB 387 580 mA 1
I
VCCA_EXP
3.3 V PCI Express* and DMI Analog
Supply Current
VCCA_EXP 167 175 mA
IVCC3_3 3.3 V CMOS Supply Current VCC3_3 0.5 16 mA
I
VCCAPLL_EXP
1.25 V PCI Express* and DMI PLL
Analog Supply Current
VCCAPLL_EXP 48 53 mA
I
VCCA_HPLL
1.25 V Host PLL Supply Current VCCA_HPLL 18 26 mA
I
VCCA_MPLL
1.25 V System Memory PLL Analog
Supply Current
VCCA_MPLL 97 146 mA