參數(shù)資料
型號: AMD-640CHIPSET
英文描述: Peripheral IC
中文描述: 外圍芯片
文件頁數(shù): 4/12頁
文件大小: 377K
代理商: AMD-640CHIPSET
4
AMD-640 Chipset I/O Model
21340A/0—April 1997
I
T
validmax
is the maximum valid delay of a signal from its
source
T
propmax
is the maximum propagation delay of the signal
along the PCB trace from its source to its destination. This
delay is obtained by simulating with the worst-case
conditions.
T
setupmin
is the minimum required setup time of a signal at
its destination
I
I
Figure 2. Timing Considerations for Meeting Setup Time
To ensure the setup time of a signal is met, the following
relationship must be met:
T
validmax
+ T
propmax
+ T
setupmin
< T
period
– T
skew
– T
jitter
Signal at Destination
Signal at Source
Clocks
T
period
T
skew
T
validmax
T
propmax
T
setupmin
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