參數(shù)資料
型號(hào)： RH80532NC029256
元件分類(lèi)： 微處理器
英文描述： Microprocessor
中文描述： 微處理器
文件頁(yè)數(shù)： 55/93頁(yè)
文件大?。?/td> 2353K
代理商： RH80532NC029256
Mobile Intel
Pentium
4 Processor-M
250686-002
Datasheet
55
The above procedure is similar for undershoot after the undershoot waveform has been converted
to look like an overshoot. Undershoot events must be analyzed separately from overshoot events as
they are mutually exclusive.
3.3.6
Conformance Determination to Overshoot/Undershoot Specifications
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
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.
1. Ensure no signal ever exceeds V
CC
or -0.25 V
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 29
through
Table 32
.
NOTES:
1. Absolute Maximum Overshoot magnitude of 1.70 V must never be exceeded.
2. Absolute Maximum Overshoot is measured relative to V
SS
, Pulse Duration of overshoot is measured relative
to V
.
3. Absolute Maximum Undershoot and Pulse Duration of undershoot is measured relative to V
SS
.
4. Ringback below V
can not be subtracted from overshoots/undershoots.
5. Lesser undershoot does not allocate longer or larger overshoot.
6. OEM's are strongly encouraged to follow Intel provided layout guidelines.
7. All values specified by design characterization.
NOTES:
1. These specifications are measured at the processor core silicon.
2. BCLK period is 10 ns.
Table 29. Source Synchronous (400 MHz) AGTL+ Signal Group Overshoot/Undershoot
Tolerance
Absolute
Maximum
Overshoot
(V)
Absolute
Maximum
Undershoot
(V)
Pulse
Duration (ns)
AF = 1
Pulse
Duration (ns)
AF = 0.1
Pulse
Duration (ns)
AF = 0.01
Notes
1,2
1.700
-0.400
0.11
1.05
5.00
1.650
-0.350
0.24
2.40
5.00
1.600
-0.300
0.53
5.00
5.00
1.550
-0.250
1.19
5.00
5.00
1.500
-0.200
5.00
5.00
5.00
1.450
-0.150
5.00
5.00
5.00
1.400
-0.100
5.00
5.00
5.00
1.350
-0.050
5.00
5.00
5.00
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