335 datasheet(61/82 Pages) INTEL

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Datasheet

Pin Listing and Signal Descriptions

VCC

Input

VCC are the power pins for the processor. The voltage supplied to these pins is

determined by the VID[5:0] pins.

VCCA

Input

VCCA provides isolated power for the internal processor core PLLs. Refer to the

applicable chipset platform design guide for complete implementation details.

VCCIOPLL

Input

VCCIOPLL provides isolated power for internal processor FSB PLLs. Follow the

guidelines for VCCA, and refer to the applicable chipset platform design guide

for complete implementation details.

VCC_SENSE

Output

VCC_SENSE is an isolated low impedance connection to processor core power

(VCC). It can be used to sense or measure voltage near the silicon with little

noise.

VCCVID

Input

1.2 V is required to be supplied to the VCCVID pin if the platform is going to

support the Celeron D processor. Refer to the applicable chipset platform design

guide for more information.

VCCVIDLB

Input

1.2 V is required to be supplied to the VCCVIDLB pin if the platform is going to

support the Celeron D processor. Refer to the applicable chipset platform design

guide for more information.

VID[5:0]

Output

VID[5:0] (Voltage ID) pins are used to support automatic selection of power

supply voltages (VCC). These are open drain signals that are driven by the

Celeron D processor and must be pulled up to 3.3 V with 1 k

Ω 5% resistors. The

voltage supply for these pins must be valid before the VR can supply VCC to the

processor. Conversely, the VR output must be disabled until the voltage supply

for the VID pins becomes valid. The VID pins are needed to support the

processor voltage specification variations. See Table 2-2 for definitions of these

pins. The VR must supply the voltage that is requested by the pins, or disable

itself.

VIDPWRGD

Input

The processor requires this input to determine that the VCCVID and VCCVIDLB

voltages are stable and within specification.

VSS

Input

VSS are the ground pins for the processor and should be connected to the

system ground plane.

VSSA

Input

VSSA is the isolated ground for internal PLLs.

VSS_SENSE

Output

VSS_SENSE is an isolated low impedance connection to processor core VSS. It

can be used to sense or measure ground near the silicon with little noise.

Table 4-3. Signal Description (Sheet 8 of 8)

Name

Type

Description

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