UPD72012 datasheet(26/36 Pages) NEC

부품명	UPD72012

상세설명	HUB CONTROLLER FOR UNIVERSAL SERIAL BUS

PDF	36 Pages

Scroll/Zoom	100%

제조업체	NEC [NEC]

홈페이지	http://www.nec.com/

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26 / 36 page

Data Sheet S13918EJ3V0DS

µPD72012

(3) HUB event timing

Parameter

Symbol

Conditions

MIN.

TYP.

MAX.

Unit

Time to detect downstream port

connection event (wake-up HUB)

2.5

2000

µs

Time to detect downstream port

connection event (suspend HUB)

tDCNN

2.5

12000

µs

Time to detect disconnect event at

downstream port (wake-up HUB)

22.5

µs

Time to detect disconnect event at

downstream port (suspend HUB)

tDDIS

10000.0

µs

Period to drive resume at downstream

port (from control HUB only)

tDRSMDN

Time from detecting downstream

resume to re-broadcasting

tURSM

100

µs

Time to detect long K state from

upstream

tURLK

2.5

5.5

µs

Time to detect long SE0 from upstream

tURLSE0

2.5

10000

µs

Period to repeat SE0 upstream

tURPSE0

FS Bit

time

Period to transmit SE0 upstream after

EOF1

tUDEOP

Optional

FS Bit

time

UPD72012 데이터시트(PDF) 26 Page - NEC

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