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USB2517 数据表(PDF) 44 Page - Microchip Technology

部件名 USB2517
功能描述  USB 2.0 Hi-Speed 7-Port Hub Controller
PDF  58 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB2517 数据表(HTML) 44 Page - Microchip Technology

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USB2517/USB2517I
DS00001598B-page 44
2013-2016 Microchip Technology Inc.
7.6.2.2
RESET_N for EEPROM Configuration
FIGURE 7-5:
RESET_N TIMING FOR EEPROM MODE
TABLE 7-7:
RESET_N TIMING FOR EEPROM MODE
Name
Description
Min
Typ
Max
Units
t1
RESET_N Asserted.
1
sec
t2
Hub Recovery/Stabilization.
500
sec
t3
EEPROM Read / Hub Config.
2.0
99.5
msec
t4
USB Attach (See Note).
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:
• When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than 100mA from the
upstream USB power source during t4+t5+t6+t7.
• 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
Read Strap
Options
Read EEPROM
+
Set Options
Attach
USB
Upstream
USB Reset
recovery
Idle
Start
completion
request
response
t3



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