upd720113 Renesas Electronics Corporation., upd720113 Datasheet - Page 25

• Manufacturer Part Number: upd720113
• Description: Usb 2.0 Hub Controller
• Manufacturer: Renesas Electronics Corporation.

Downstream
Port of Hub
Upstream
End of
Cable
V
V
SS
SS
A. Downstream EOP Delay with Cable
50% Point of
Initial Swing
EOP Delay:
EOP Skew:
Low-speed timings are determined in the same way for:
Upstream Port
t
(t
t
t
End of Cable
Downstream
FEOPD
FHESK
LEOPD
Port of Hub
EOPy
t
EOP-
V
V
SS
SS
or
Figure 2-14. Hub EOP Delay and EOP Skew
means that this equation applies to t
= t
= t
and t
C. Upstream EOP Delay with or without Cable
t
EOP+
EOP+
EOPy
LHESK
− t
− t
HDDx
EOP-
Data Sheet S16618EJ3V0DS
t
EOP-
Downstream
Port of Hub
Port of Hub
Upstream
V
V
SS
SS
B. Downstream EOP Delay without Cable
t
Crossover
Extended
EOP+
Point
EOP-
and t
Crossover
Extended
Point
EOP+
)
t
EOP-
t
EOP+
µ
Crossover
Extended
PD720113
Point
25