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USB2517 Datasheet(PDF) 45 Page - Microchip Technology

Part # USB2517
Description  USB 2.0 Hi-Speed 7-Port Hub Controller
PDF  58 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB2517 Datasheet(HTML) 45 Page - Microchip Technology

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2013-2016 Microchip Technology Inc.
DS00001598B-page 45
USB2517/USB2517I
7.6.2.3
RESET_N for SMBus Slave Configuration
FIGURE 7-6:
RESET_N TIMING FOR SMBUS MODE
TABLE 7-8:
RESET_N TIMING FOR SMBUS MODE
Name
Description
Min
Typ
Max
Units
t1
RESET_N Asserted.
1
sec
t2
Hub Recovery/Stabilization.
500
sec
t3
SMBus Code Load (See Note).
250
300
msec
t4
Hub Configuration and USB Attach.
100
msec
t5
Host acknowledges attach and signals USB
Reset.
100
msec
t6
USB Idle.
Undefined
msec
t7
Completion time for requests (with or without data
stage).
5
msec
Note:
• For Bus-Powered configurations, the 99.5ms (MAX) is required, and the Hub and its associated circuitry must not
consume more than 100mA from the upstream USB power source during t2+t3+t4+t5+t6+t7. For Self-Powered
configurations, t3 MAX is not applicable and the time to load the configuration is determined by the external
SMBus host.
• All Power Supplies must have reached the operating levels mandated in Section 8.0, "DC Parameters", prior to
(or coincident with) the assertion of RESET_N.
t1
t2
t4
t5
t6
t7
RESET_N
VSS
Hardware
reset
asserted
Reset
Negation
SMBus Code
Load
Attach
USB
Upstream
USB Reset
recovery
Idle
Start
completion
request
response
t3
Hub PHY
Stabilization



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