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USB2524 데이터시트(PDF) 48 Page - SMSC Corporation

부품명 USB2524
상세설명  USB MultiSwitchTM Hub
PDF  57 Pages
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제조업체  SMSC [SMSC Corporation]
홈페이지  http://www.smsc.com
Logo SMSC - SMSC Corporation

USB2524 데이터시트(HTML) 48 Page - SMSC Corporation

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USB MultiSwitchTM Hub
Datasheet
Revision 1.91 (08-22-07)
48
SMSC USB2524
DATASHEET
9.1.1.1
RESET_N for Strapping Option Configuration
Figure 9.1 Reset_N Timing for Default/Strap Option Mode
Note 9.1
When in Bus-Powered mode, the Hub and its associated circuitry must not consume more
than 100mA from the upstream USB power source during t1+t5.
Table 9.1 Reset_N Timing for Default/Strap Option Mode
NAME
DESCRIPTION
MIN
TYP
MAX
UNITS
t1
RESET_N Asserted.
1
μsec
t2
Strap Setup Time
16.7
nsec
t3
Strap Hold Time.
16.7
1400
nsec
t4
hub outputs driven to inactive logic states
1.5
2.0
μsec
t5
USB Attach (See Note 9.1)
100
msec
t6
Host acknowledges attach and signals USB
Reset.
100
msec
t7
USB Idle.
undefined
msec
t8
Completion time for requests (with or without data
stage).
5
msec
t1
t4
t5
t6
t7
t8
Valid
Don’t Care
Don’t Care
Driven by Hub if strap is an output.
RESET_N
VSS
Strap Pins
VSS
Hardware
reset
asserted
Read Strap
Options
Drive Strap
Outputs to
inactive
levels
Attach
USB
Upstream
USB Reset
recovery
Idle
Start
completion
request
response
t2
t3



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