參數(shù)資料
型號(hào): UPD720113GK-9EU-A
廠商: NEC Corp.
英文描述: USB 2.0 HUB CONTROLLER
中文描述: USB 2.0集線器控制器
文件頁數(shù): 25/32頁
文件大?。?/td> 362K
代理商: UPD720113GK-9EU-A
Data Sheet S16618EJ3V0DS
25
μ
PD720113
Figure 2-14. Hub EOP Delay and EOP Skew
t
EOP-
t
EOP+
t
EOP-
t
EOP+
t
EOP-
t
EOP+
C. Upstream EOP Delay with or without Cable
Upstream
End of
Cable
Upstream
Port of Hub
Downstream
Port of Hub
Downstream
Port of Hub
Downstream
Port of Hub
Upstream Port
or
End of Cable
A. Downstream EOP Delay with Cable
B. Downstream EOP Delay without Cable
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
50% Point of
Initial Swing
Crossover
Point
Extended
Crossover
Point
Extended
Crossover
Point
Extended
EOP Delay:
t
FEOPD
= t
EOPy
t
HDDx
(t
EOPy
means that this equation applies to t
EOP-
and t
EOP+
)
EOP Skew:
t
FHESK
= t
EOP+
t
EOP-
Low-speed timings are determined in the same way for:
t
LEOPD
and t
LHESK
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