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參數(shù)資料
| 型號： | USB3450 |
| 廠商： | SMSC Corporation |
| 英文描述： | HI-SPEED USB HOST OR DEVICE PHY WITH UTMI+INTERFACE |
| 中文描述： | 高速USB主機或設(shè)備與UTMI接口物理層 |
| 文件頁數(shù)： | 38/40頁 |
| 文件大?。?/td> | 1086K |
| 代理商： | USB3450 |
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Hi-Speed USB Host or Device PHY With UTMI+ Interface
Datasheet
Revision 0.1 (05-11-05)
38
SMSC USB3450
DATASHEET
If the device was in FS mode: then the Link leaves the FS terminations enabled. After the SE0 expires,
the downstream port will assert a J state for one low-speed bit time, and the bus will enter a FS Idle
state (maintained by the FS terminations).
If the device was in HS mode: then the Link must switch to the FS terminations before the SE0 expires
(< 1.25μs). After the SE0 expires, the bus will then enter a HS IDLE state (maintained by the HS
terminations).
7.13
HS Device Attach
Figure 7.8
demonstrates the timing of the USB3450 control signals during a device attach event. When
a HS device is attached to an upstream port, power is asserted to the device and the device sets
XCVRSELECT and TERMSELECT to FS mode (time T1).
V
BUS
is the +5V power available on the USB cable. Device Reset in
Figure 7.8
indicates that V
BUS
is
within normal operational range as defined in the Hi-Speed specification. The assertion of Device
Reset (T0) by the upstream port will initialize the device. By monitoring LINESTATE, the Link state
machine knows to set the XCVRSELECT and TERMSELECT signals to FS mode (T1).
The standard FS technique of using a pull-up resistor on DP to signal the attach of a FS device is
employed. The Link must then check the LINESTATE signals for SE0. If LINESTATE = SE0 is asserted
at time T2 then the upstream port is forcing the reset state to the device (i.e. Driven SE0). The device
will then reset itself before initiating the HS Detection Handshake protocol.
Figure 7.8 Device Attach Behavior
Table 7.10 Attach and Reset Timing Values
TIMING
PARAMETER
DESCRIPTION
VALUE
T0
Vbus Valid.
0 (reference)
T1
Maximum time from Vbus valid to when the device
must signal attach.
T0 + 100ms < T1
T2
(HS Reset T0)
Debounce interval. The device now enters the HS
Detection Handshake protocol.
T1 + 100ms < T2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| USB3450-FZG | HI-SPEED USB HOST OR DEVICE PHY WITH UTMI+INTERFACE |
| USB97C201 | USB 2.0 ATA/ ATAPI Controller |
| USB97C201-MC | USB 2.0 ATA/ ATAPI Controller |
| USB97C201-MN | USB 2.0 ATA/ ATAPI Controller |
| USB97CFDC-MN | USB FLOPPY DISK CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| USB3450-FZG | 功能描述:接口 - 專用 USB 2.0 PHY UTMI RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
| USB-3488A | 功能描述:數(shù)據(jù)記錄與采集 HIGH PERF IEEE-488 USB DAQ GPIB INT CON RoHS:否 制造商:Lantronix 描述/功能:Analog device server 顯示器類型:None 電流額定值: |
| USB3500 | 制造商:SMSC 制造商全稱:SMSC 功能描述:Hi-Speed USB Host, Device or OTG PHY With UTMI+ Interface |
| USB3500-ABZJ | 功能描述:接口 - 專用 USB 2.0 PHY UTMI RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
| USB3503 | 制造商:SMSC 制造商全稱:SMSC 功能描述:USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications |
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