參數(shù)資料
型號: celeron 700
廠商: Intel Corp.
英文描述: Intel Celeron Processor Up To 700 MHz(頻率達(dá)700MHz的INTEL Celeron 處理器)
中文描述: 英特爾賽揚(yáng)處理器高達(dá)700兆赫(頻率達(dá)700MHz的英特爾賽揚(yáng)處理器的)
文件頁數(shù): 54/118頁
文件大小: 990K
代理商: CELERON 700
54
Datasheet
Intel
Celeron Processor up to 700 MHz
3.4.6
Determining if a System meets the Overshoot/Undershoot
Specifications (FC-PGA Package)
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 each have their own set of parameters (duration,
AF and magnitude). While each overshoot on its own may meet the overshoot specification, when
the total impact of all overshoot events is accounted for, the system may fail. A guideline to ensure
a system passes the overshoot and undershoot specifications is shown below. It is important to
meet these guidelines; otherwise, contact your Intel field representative.
1. Insure no signal (CMOS or AGTL+) ever exceed the 1.635V; OR
2. If only one overshoot/undershoot event magnitude occurs, ensure it meets the over/undershoot
specifications in the following tables; OR
3. 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. 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.
The following notes apply to
Table 34
and
Table 35
.
NOTES:
1. Overshoot/Undershoot Magnitude = 2.18V is an Absolute value and should never be exceeded
2. Overshoot is measured relative to V
SS
3. Undershoot is measured relative to V
TT
4. Overshoot/Undershoot Pulse Duration is measured relative to 1.635V.
5. Ringbacks below V
TT
can not be subtracted from Overshoots/Undershoots.
6. Lesser Undershoot does not allocate longer or larger Overshoot.
7. Consult the appropriate layout guidelines provided in the specific platform design guide.
8. All values specified by design characterization.
NOTES:
1. BCLK period is 30.0 ns.
2. Measurements taken at the processor socket pins on the solder-side of the motherboard.
Table 34. 66 MHz AGTL+ Signal Group Overshoot/Undershoot Tolerance at Processor Pins
(FC-PGA Package)
1, 2
Overshoot/
Undershoot
Magnitude
Maximum Pulse Duration at Tj = 80 °C
(ns)
Maximum Pulse Duration at Tj = 90 °C
(ns)
AF = 0.01
AF = 0.1
AF = 1
AF = 0.01
AF = 0.1
AF = 1
2.18 V
30
3.8
0.38
18
1.8
0.18
2.13 V
30
7.4
0.74
30
3.2
0.32
2.08 V
30
13.6
1.36
30
6.4
0.64
2.03 V
30
25
2.5
30
12
1.1
1.98 V
30
30
4.56
30
22
2
1.93 V
30
30
8.2
30
30
3.8
1.88 V
30
30
15
30
30
6.8
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