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USB2504 データシート(PDF) 28 Page - Microchip Technology

部品番号 USB2504
部品情報  Integrated USB 2.0 Compatible 4-Port Hub
PDF  42 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB2504 データシート(HTML) 28 Page - Microchip Technology

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USB2504/USB2504A
DS000002250A-page 28
 2007 - 2016 Microchip Technology Inc.
Note 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.
2: 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.
5.6.1.2
RESET_N for EEPROM Configuration
Note 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 t4+t5+t6+t7.
2: 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.
t5
USB Attach (See Note).
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
FIGURE 5-3:
RESET_N TIMING FOR EEPROM MODE
TABLE 5-6:
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
TABLE 5-5:
RESET_N TIMING FOR DEFAULT/STRAP OPTION MODE (CONTINUED)
Name
Description
MIN
TYP
MAX
Units
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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