352 datasheet(32/95 Pages) INTEL

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Electrical Specifications

Datasheet

2.7.4

BCLK[1:0] Specifications

§ §

Table 19.

Front Side Bus Differential BCLK Specifications

Symbol

Parameter

Min

Typ

Max

Unit Notes1

NOTES:

1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.

Input Low Voltage

-0.150

0.000

N/A

Input High Voltage

0.660

0.700

0.850

CROSS(abs)

Absolute Crossing

Point

0.250

N/A

0.550

2, 3

2. Crossing voltage is defined as the instantaneous voltage value when the rising edge of BCLK0

equals the falling edge of BCLK1.

3. The crossing point must meet the absolute and relative crossing point specifications

simultaneously.

CROSS(rel)

Relative Crossing

Point

0.250 +

0.5(

HAVG – 0.700)

N/A

0.550 +

0.5(

HAVG – 0.700)

4, 3, 5

4. V

Havg is the statistical average of the VH measured by the oscilloscope.

5. V

Havg can be measured directly using “Vtop” on Agilent* oscilloscopes and “High” on Tektronix*

oscilloscopes.

ΔV

CROSS

Range of Crossing

Points

N/A

0.140

Overshoot

N/A

H + 0.3

6. Overshoot is defined as the absolute value of the maximum voltage.

Undershoot

-0.300

N/A

7. Undershoot is defined as the absolute value of the minimum voltage.

RBM

Ringback Margin

0.200

N/A

8. Ringback Margin is defined as the absolute voltage difference between the maximum Rising

Edge Ringback and the maximum Falling Edge Ringback.

Threshold Region

VCROSS – 0.100

N/A

VCROSS + 0.100

9. Threshold Region is defined as a region entered around the crossing point voltage in which the

differential receiver switches. It includes input threshold hysteresis.

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