Electrical Specifications
Table 12. System Bus Differential BCLK Specifications
Symbol
Parameter
Min
Typ
Max
Unit Figure Notes1
Input Low
Voltage
VL
-0.150
0.000
N/A
V
V
V
10
10
Input High
Voltage
VH
0.660
0.250
0.710
N/A
0.850
0.550
Absolute
Crossing Point
VCROSS(abs)
10, 11
2,3,8
0.250 +
0.550 +
Relative
Crossing Point
VCROSS(rel)
N/A
N/A
V
V
10, 11 2,3,8,9
0.5(VHavg - 0.710)
0.5(VHavg - 0.710)
Range of
Crossing Points
∆VCROSS
N/A
0.140
10, 11
2,10
VOV
VUS
Overshoot
N/A
N/A
N/A
VH + 0.3
N/A
V
V
10
10
4
5
Undershoot
-0.300
Ringback
Margin
VRBM
VTM
0.200
N/A
N/A
N/A
V
V
10
10
6
7
Threshold
Margin
VCROSS - 0.100
VCROSS + 0.100
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. VHavg is the statistical average of the VH measured by the oscilloscope.
4. Overshoot is defined as the absolute value of the maximum voltage.
5. Undershoot is defined as the absolute value of the minimum voltage.
6. Ringback Margin is defined as the absolute voltage difference between the maximum Rising Edge Ringback
and the maximum Falling Edge Ringback.
7. Threshold Region is defined as a region entered around the crossing point voltage in which the differential
receiver switches. It includes input threshold hysteresis.
8. The crossing point must meet the absolute and relative crossing point specifications simultaneously.
9. VHavg can be measured directly using "Vtop" on Agilent* scopes and "High" on Tektronix* scopes.
10.∆VCROSS is defined as the total variation of all crossing voltages as defined in note 2.
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Mobile Intel Pentium 4 Processor-M Datasheet
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