Datasheet

Electrical Specifications
Dual-Core Intel
®
Xeon
®
Processor 7000 Series Datasheet 29
NOTES:
1. V
OS
is measured overshoot voltage.
2. T
OS
is measured time duration above VID.
Figure 2-5. V
CC
Overshoot Example Waveform
Example Overshoot Waveform
0 5 10 15 20 25
Time [us]
Voltage [V]
VID - 0.000
VID + 0.050
V
OS
T
OS
T
OS
: Overshoot time above VID
V
OS
: Overshoot above VID
Table 2-11. Front Side Bus Differential BCLK Specifications
Symbol Parameter Min Typ Max Unit Figure Notes
VL Input Low Voltage -0.150 0.000 N/A V
V
H Input High Voltage 0.660 0.700 0.850 V
V
CROSS(abs) Absolute Crossing
Point
0.250 N/A 0.550 V
1, 2
NOTES:
1. Crossing voltage is defined as the instantaneous voltage value when the rising edge of BCLK0 is equal to the
falling edge of BCLK1.
2. The crossing point must meet the absolute and relative crossing point specifications simultaneously.
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
3, 2, 4
3. V
Havg
is the statistical average of the V
H
measured by the oscilloscope.
4. V
Havg
can be measured directly using “Vtop” on Agilent scopes and “High” on Tektronix scopes.
Δ V
CROSS Range of Crossing
Point
N/A N/A 0.140 V
V
OV Overshoot N/A N/A V
H
+ 0.300 V
5
5. Overshoot is defined as the absolute value of the maximum voltage.
V
US Undershoot -0.300 N/A N/A V
6
6. Undershoot is defined as the absolute value of the minimum voltage.
V
RBM Ringback Margin 0.200 N/A N/A V
7
7. Ringback Margin is defined as the absolute voltage difference between the maximum Rising Edge Ringback
and the maximum Falling Edge Ringback.
V
TM Threshold Margin V
CROSS
-0.100 V
CROSS
+0.100 V
8
8. Threshold Region is defined as a region entered around the crossing point voltage in which the differential
receiver switches. It includes input threshold hysteresis.