®
MOBILE PENTIUM PROCESSOR WITH MMX™ TECHNOLOGY
UNDERSHOOT
THRESHOLD
DURATION
SPECIFICATION: The undershoot threshold
duration is defined as the sum of all time during
which the CLK signal is below -0.3V within a single
clock period. The undershoot threshold duration
must not exceed 20 percent of the period.
4.4.2.3.
Signal Quality Specification
The maximum overshoot, maximum undershoot,
overshoot threshold duration, undershoot threshold
duration, and maximum ringback specifications for
CLK are described below:
MAXIMUM RINGBACK SPECIFICATION: The
maximum ringback of CLK associated with their
MAXIMUM
OVERSHOOT
AND
MAXIMUM
high states (overshoot) must not drop below VCC3
-
UNDERSHOOT SPECIFICATION: The maximum
overshoot of the CLK signals should not exceed
VCC3,nominal + 0.6V. The maximum undershoot of
the CLK signals must not drop below -0.6V.
0.7V as shown in Figure 15. Similarly, the
maximum ringback of CLK associated with their low
states (undershoot) must not exceed 0.5V as
shown in Figure 17.
OVERSHOOT
THRESHOLD
DURATION
Refer to Table 22 and Table 23 for a summary of
the clock overshoot and undershoot specifications
for the 200- and 233 MHz Pentium processor with
MMX technology.
SPECIFICATION: The overshoot threshold duration
is defined as the sum of all time during which the
CLK signal is above VCC3,nominal + 0.3V within a
single clock period. The overshoot threshold
duration must not exceed 20 percent of the period.
Table 22. Overshoot Specification Summary
Specification Name
Threshold Level
Value
Units
Notes
1,2
VCC3,nominal + 0.3 (CLK & PICCLK)
VCC3,nominal + 0.5 (All other inputs)
VCC3,nominal + 0.6 (CLK & PICCLK)
VCC3,nominal + 1.0 (All other inputs)
V
Maximum Overshoot Level
V
1,2
Maximum Threshold Duration
Maximum Ringback
20% of clock period above threshold
voltage
nS
V
2
VCC3,nominal - 0.7
1,2
NOTES:
1.
2. See Figures 14 and 15.
V
, nominal refers to the voltage measured at the bottom side of the V 3 pins. See Section 4.3.1. for details.
CC
CC3
53
INTEL [ INTEL ]
