Intel® Celeron® Processor for PGA370 up to 1.40 GHz on 0.13 µ Process
3.4.2
3.4.3
Transition time
The transition time is defined as the time the signal takes to move through the transition region. A
100 microsecond transition time will ensure that the processor receives a good transition edge.
Noise
The signal quality of the VTT_PWRGD signal is critical to the correct operation of the processor.
Every effort should be made to ensure this signal is monotonic in the transition region. If noise or
glitches are present on this signal, it must be kept to less than 100 mV of a voltage drop from the
highest voltage level received to that point. This glitch must remain less than 100 mV until the
excursion ends by the voltage returning to the highest voltage previously received. See Figure 22
for an example graph of this situation and requirements.
Figure 22. Noise Estimation
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