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UPD72012 Scheda tecnica(PDF) 26 Page - NEC

Il numero della parte UPD72012
Spiegazioni elettronici  HUB CONTROLLER FOR UNIVERSAL SERIAL BUS
PDF  36 Pages
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Produttore elettronici  NEC [NEC]
Homepage  http://www.nec.com/
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UPD72012 Scheda tecnica(HTML) 26 Page - NEC

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26
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
2
10000.0
µs
Period to drive resume at downstream
port (from control HUB only)
tDRSMDN
20
ms
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
23
FS Bit
time
Period to transmit SE0 upstream after
EOF1
tUDEOP
Optional
2
FS Bit
time



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