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UPD720101 Datasheet(PDF) 24 Page - NEC

Part No. UPD720101
Description  USB2.0 HOST CONTROLLER
Download  36 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD720101 Datasheet(HTML) 24 Page - NEC

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Data Sheet S16265EJ4V0DS
24
µPD720101
(2/2)
Parameter
Symbol
Conditions
Min.
Max.
Unit
High-speed Source Electrical Characteristics
Rise time (10 to 90%)
tHSR
500
ps
Fall time (90 to 10%)
tHSF
500
ps
Driver waveform
See Figure 3-6.
High-speed data rate
tHSDRAT
479.760
480.240
Mbps
Microframe interval
tHSFRAM
124.9375
125.0625
µs
Consecutive microframe interval difference
tHSRFI
4 high-
speed
Bit
times
Data source jitter
See Figure 3-6.
Receiver jitter tolerance
See Figure 3-4.
Hub Event Timings
Time to detect a downstream facing port
connect event
tDCNN
2.5
2000
µs
Time to detect a disconnect event at a
hub’s downstream facing port
tDDIS
2.0
2.5
µs
Duration of driving resume to a
downstream port
tDRSMDN
Nominal
20
ms
Time from detecting downstream resume
to rebroadcast
tURSM
1.0
ms
Inter-packet delay for packets traveling in
same direction for high-speed
tHSIPDSD
88
Bit
times
Inter-packet delay for packets traveling in
opposite direction for high-speed
tHSIPDOD
8
Bit
times
Inter-packet delay for root hub response for
high-speed
tHSRSPIPD1
192
Bit
times
Time for which a Chirp J or Chirp K must
be continuously detected during reset
handshake
tFILT
2.5
µs
Time after end of device Chirp K by which
hub must start driving first Chirp K
tWTDCH
100
µs
Time for which each individual Chirp J or
Chirp K in the chirp sequence is driven
downstream during reset
tDCHBIT
40
60
µs
Time before end of reset by which a hub
must end its downstream chirp sequence
tDCHSE0
100
500
µs


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