450 datasheet(30/100 Pages) INTEL

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Electrical Specifications

Datasheet

2.8.4

BCLK[1:0] Specifications (CK505 based Platforms)

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

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

BCLK0 equals the falling edge of BCLK1.

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

"Steady state" voltage, not including overshoot or undershoot.

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

as the absolute value of the minimum voltage.

Measurement taken from differential waveform.

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

simultaneously.

Cpad includes die capacitance only. No package parasitics are included.

Table 17.

Front Side Bus Differential BCLK Specifications

Symbol

Parameter

Min

Typ

Max

Unit

Figure

Notes1

Input Low Voltage

-0.30

N/A

Input High Voltage

N/A

1.15

CROSS(abs)

Absolute Crossing Point

0.300

N/A

0.550

3, 4

2,4,6

ΔV

CROSS

Range of Crossing Points

N/A

0.140

3, 4

Overshoot

N/A

1.4

Undershoot

-0.300

N/A

SWING

Differential Output Swing

0.300

N/A

ILI

Input Leakage Current

-5

N/A

μA

Cpad

Pad Capacitance

.95

1.2

1.45

Figure 3.

Differential Clock Waveform

High Time

Period

CROSS

CLK 1

CLK 0

Low Time

VCROSS Min

300 mV

VCROSS Max

500 mV

median

CROSS

median

CROSS

Median + 75 mV

Median - 75 mV

CROSS

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