320 datasheet(22/82 Pages) INTEL

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Datasheet

Electrical Specifications

2.9

FSB Frequency Select Signals (BSEL[1:0])

The BSEL[1:0] signals are used to select the frequency of the processor input clock (BCLK[1:0]).

Table 2-6 defines the possible combinations of the signals and the frequency associated with each

combination. The required frequency is determined by the processor, chipset, and clock

synthesizer. All agents must operate at the same frequency.

The Celeron D processor currently operates at a 533 MHz FSB frequency (selected by a 133 MHz

BCLK[1:0] frequency). Individual processors will only operate at their specified FSB frequency.

For more information about these pins, refer to Section 4.2.

2.10

Absolute Maximum and Minimum Ratings

Table 2-7 specifies absolute maximum and minimum ratings. Within functional operation limits,

functionality and long-term reliability can be expected.

At conditions outside functional operation condition limits, but within absolute maximum and

minimum ratings, neither functionality nor long-term reliability can be expected. If a device is

returned to conditions within functional operation limits after having been subjected to conditions

outside these limits, but within the absolute maximum and minimum ratings, the device may be

functional, but with its lifetime degraded depending on exposure to conditions exceeding the

functional operation condition limits.

At conditions exceeding absolute maximum and minimum ratings, neither functionality nor long-

term reliability can be expected. Moreover, if a device is subjected to these conditions for any

length of time then, when returned to conditions within the functional operating condition limits, it

will either not function, or its reliability will be severely degraded.

Although the processor contains protective circuitry to resist damage from static electric discharge,

precautions should always be taken to avoid high static voltages or electric fields.

Table 2-6. BSEL[1:0] Frequency Table for BCLK[1:0]

BSEL1

BSEL0

Function

133 MHz

Table 2-7. Processor DC Absolute Maximum Ratings

Symbol

Parameter

Min

Max

Unit

Notes

VCC

Core voltage with respect to VSS

- 0.3

1.55

NOTES:

For functional operation, all processor electrical, signal quality, mechanical and thermal specifications must

be satisfied.

VTT

FSB termination voltage with respect to VSS

- 0.3

1.55

Processor case temperature

See

Chapter 5

See

Chapter 5

°C

2, 3

Storage temperature is applicable to storage conditions only. In this scenario, the processor must not receive

a clock, and no lands can be connected to a voltage bias. Storage within these limits will not affect the long-

term reliability of the device. For functional operation, refer to the processor case temperature specifications.

This rating applies to the processor and does not include any tray or packaging.

TSTORAGE

Processor storage temperature

–40

+85

°C

2, 3

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