Intel III Xeon 700 MHz 80526KY7002M Manual Do Utilizador
Códigos do produto
80526KY7002M
SIGNAL QUALITY
36
The overshoot/undershoot specifications listed in the following tables specify the allowable overshoot/undershoot for a
single overshoot/undershoot event. However most systems will have multiple overshoot and/or undershoot events that will
each have their own set of parameters (duration, AF and magnitude). While each overshoot on its own may meet the
overshoot specification, when you add the total impact of all overshoot events, the system may fail. A guideline to ensure
a system passes the overshoot and undershoot specifications is shown below.
•
single overshoot/undershoot event. However most systems will have multiple overshoot and/or undershoot events that will
each have their own set of parameters (duration, AF and magnitude). While each overshoot on its own may meet the
overshoot specification, when you add the total impact of all overshoot events, the system may fail. A guideline to ensure
a system passes the overshoot and undershoot specifications is shown below.
•
Insure no signal (CMOS or AGTL+) ever exceed the 1.635V.
•
If only one overshoot/undershoot event magnitude occurs, ensure it meets the over/undershoot specifications in the
following tables. This means that whenever the over/undershoot event occurs, it always over/undershoots to the
same level.
following tables. This means that whenever the over/undershoot event occurs, it always over/undershoots to the
same level.
•
If multiple overshoots and/or multiple undershoots occur, measure the worst-case pulse duration for each magnitude
and compare the results against the AF = 1 specifications (note: multiple overshoot/undershoot events within one
clock cycle must have their pulse durations summed together to determine the total pulse duration). If all of these
worst case overshoot or undershoot events meet the specifications (measured time < specifications) in the table
where AF=1, then the system passes.
and compare the results against the AF = 1 specifications (note: multiple overshoot/undershoot events within one
clock cycle must have their pulse durations summed together to determine the total pulse duration). If all of these
worst case overshoot or undershoot events meet the specifications (measured time < specifications) in the table
where AF=1, then the system passes.
Table 24. AGTL+ Signal Overshoot/Undershoot Limits at the Processor Core
1, 2,3,4,5,6,7,8,9,10
Max Pulse Duration (nS)
Overshoot/Undershoot
Magnitude
Magnitude
AF = 0.01
AF = 0.1
AF = 1
2.3 20
2.53
0.25
2.25 20
4.93
0.49
2.2 20
9.1
0.91
NOTES: