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USB3503 数据表(PDF) 39 Page - SMSC Corporation

部件名 USB3503
功能描述  USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications
PDF  82 Pages
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制造商  SMSC [SMSC Corporation]
网页  http://www.smsc.com
标志 SMSC - SMSC Corporation

USB3503 数据表(HTML) 39 Page - SMSC Corporation

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USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications
Datasheet
SMSC USB3503A
39
Revision 1.1 (02-07-13)
DATASHEET
5.3.32
Register EEh: Configure Portable Hub - CFGP
Default = 0x00h - Corresponds to 95ms startup & Phone RefClks available
5.3.33
Register F4h: Varisense_UP3 - VSNSUP3
Default = 0x00h
BIT NUMBER
BIT NAME
DESCRIPTION
7
ClkSusp
(Read/Write)
1 = Force device to run internal clock even during USB suspend (will cause
device to violate USB suspend current limit - intended for test or self-powered
applications which require use of serial port during USB session.)
0 = Allow device to gate off its internal clocks during suspend mode in order to
meet USB suspend current requirements.
6
IntSusp
(Read/Write)
1 = INT_N pin function is a level sensitive USB suspend interrupt indication.
Allows system to adjust current consumption to comply with USB specification
limits when hub is in the USB suspend state.
0 = INT_N pin function retains event sensitive role of a general serial port
interrupt.
See Section 3.3.4, "Interrupt," on page 18 for more information.
5:4
CfgTout
(Read Only)
Specifies timeout value for allowing SOC to configure the device. Corresponds
to the Thubconfig parameter. See Section Table 4.2, "Timing Parameters for Hub
Stages".
‘00’ = 95ms - Use to meet legacy 100ms connect timing
3
Reserved
Reserved
2:0
Reserved
Reserved
BIT NUMBER
BIT NAME
DESCRIPTION
7:3
Reserved
Reserved
2:0
DN3_SQUELCH These two bits control the Squelch setting of the downstream port 3.
‘000’ = Nominal value
‘001’ = 90% of Nominal value
‘010’ = 80% of Nominal value
‘011’ = 70% of Nominal value
‘100’ = 60% of Nominal value
‘101’ = 50% of Nominal value
‘110’ = 120% of Nominal value
‘111’ = 110% of Nominal value



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