UPD720112 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD720112

USB 2.0 HUB CONTROLLER

NEC => Renesas Technology 

µPD720112

Over-current Response Timing

Parameter

Over-current response time from CSB

low to PPB high (Figure 2-7)

Symbol

tOC

Condition

MIN.

TYP.

MAX.

Unit

500

625

µs

Figure 2-7. Over-current Response Timing

CSB(4:1)

tOC

PPB(4:1)

Hub power supply

Up port D+ line

PPB pin output

CSB pin input

CSB pin operation region

Figure 2-8. CSB/PPB Timing

500 µs 500 µs

500 µs 500 µs

Bus reset

Port power

supply ON

Device

connection

inrush current

Output

cut-off

Overcurrent

generation

Bus power: Up port connection

Self power: Power supply ON

CSB detection

delay time

Remark 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 µs duration at the CSB pin.

CSB active

period

Data Sheet S16616EJ2V0DS

17

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