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Datasheet

Electrical Specifications

2.6.2

DC Voltage and Current Specification

NOTES:

Unless otherwise noted, all specification in this table are based on estimates and

simulation or empirical data. These specifications will be updated with characterized data

from silicon measurements at a later date.

Adherence to the voltage specification for the processor are required to ensure reliable

processor operation.

Each processor is programmed with a maximum valid voltage identification value (VID),

which is set at manufacturing and can not be altered. Individual maximum VID values are

calibrated during manufacturing such that two processors at the same frequency may have

different settings within the VID range. Please note this differs from the VID employed by

the processor during a power management event (Thermal Monitor 2).

These voltages are targets only. A variable voltage source should exist on systems in the

event that a different voltage is required. See Section 2.3 and Table 2 for more

information.

The voltage specification requirements are measured across VCC_SENSE and VSS_SENSE

lands at the socket with a 100 MHz bandwidth oscilloscope, 1.5 pF maximum probe

capacitance, and 1 MΩ minimum impedance. The maximum length of ground wire on the

probe should be less than 5 mm. Ensure external noise from the system is not coupled into

the oscilloscope probe.

Refer to Table 6 and Figure 1 for the minimum, typical, and maximum V

CC allowed for a

given current. The processor should not be subjected to any VCC and ICC combination

wherein VCC exceeds VCC_MAX for a given current.

ICC_MAX specification is based on the VCC_MAX loadline. Refer to Figure 1f or details.

Table 5.

Voltage and Current Specifications

Symbol

Parameter

Min

Typ

Max

Unit

Notes2, 15

VID Range

VID

1.0000

—

1.3375

VCC

Processor Number

450

440

430

420

Core VCC

2.2 GHz

2.0 GHz

1.8 GHz

1.6 GHz

Refer to Table 6 and

Figure 1

V4, 5, 6

VCC_BOOT

Default VCC voltage for initial power up

—

1.10

—

VCCPLL

PLL VCC

- 5%

1.50

+ 5%

ICC

Processor Number

450

440

430

420

ICC for

775_VR_CONFIG_06

2.2 GHz

2.0 GHz

1.8 GHz

1.6 GHz

——

VTT

FSB termination voltage

(DC + AC specifications)

1.14

1.20

1.26

VTT_OUT_LEFT

and

VTT_OUT_RIGHT

ICC

DC Current that may be drawn from

VTT_OUT_LEFT and VTT_OUT_RIGHT per pin

——

580

ITT

ICC for VTT supply before VCC stable

ICC for VTT supply after VCC stable

——

4.5

4.6

A10

ICC_VCCPLL

ICC for PLL land

——

130

ICC_GTLREF

ICC for GTLREF

—

200

μA

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