300 Datasheet, PDF (32/95 Pages) DB Lectro Inc – SCREW TYPE SERIES

Electrical Specifications
2.7.4 BCLK[1:0] Specifications
Table 19.
Front Side Bus Differential BCLK Specifications
Symbol
Parameter
Min
Typ
Max
Unit Notes¹
V_L
V_H
V_CROSS(abs)
Input Low Voltage
Input High Voltage
Absolute Crossing
Point
-0.150
0.660
0.250
0.000
0.700
N/A
N/A
0.850
0.550
V
-
V
-
V
2_, 3
V_CROSS(rel)
Relative Crossing
Point
0.250 +
0.5(V_HAVG – 0.700)
N/A
0.550 +
0.5(V_HAVG – 0.700)
V
4, 3, 5
ΔV_CROSS
Range of Crossing
Points
N/A
N/A
0.140
V
-
V_OS
Overshoot
N/A
N/A
V_H + 0.3
V
6
V_US
Undershoot
-0.300
N/A
N/A
V
7
V_RBM
Ringback Margin
0.200
N/A
N/A
V
8
V_TM
Threshold Region
V_CROSS – 0.100 N/A V_CROSS + 0.100 V
9
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
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.
4. V_Havg is the statistical average of the V_H measured by the oscilloscope.
5. V_Havg can be measured directly using “Vtop” on Agilent* oscilloscopes and “High” on Tektronix*
oscilloscopes.
6. Overshoot is defined as the absolute value of the maximum voltage.
7. Undershoot is defined as the absolute value of the minimum voltage.
8. Ringback Margin is defined as the absolute voltage difference between the maximum Rising
Edge Ringback and the maximum Falling Edge Ringback.
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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Datasheet