upd720113 Renesas Electronics Corporation., upd720113 Datasheet - Page 17

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

Over-current Response Timing
CSB pin operation region
Over-current response time from CSB
low to PPB high (Figure 2-7)
Remark
Hub power supply
Up port D+ line
PPB pin output
CSB pin input
CSB(7:1)
PPB(7:1)
The active period of the CSB pin is in effect only when the PPB pin is ON.
There is a delay time of approximately 500
Parameter
Bus power: Up port connection
Self power: Power supply ON
Figure 2-7. Over-current Response Timing
Port power
supply ON
Bus reset
t
OC
Symbol
Figure 2-8. CSB/PPB Timing
Data Sheet S16618EJ3V0DS
500 µs
t
OC
µ
s duration at the CSB pin.
Condition
500 µs
Device
connection
inrush current
CSB detection
delay time
MIN.
500
500 µs
TYP.
500 µs
µ
MAX.
625
PD720113
CSB active
period
Overcurrent
generation
Output
cut-off
Unit
µ
s
17