參數(shù)資料
型號(hào)： 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(jī)或設(shè)備與UTMI接口物理層
文件頁(yè)數(shù)： 37/40頁(yè)
文件大小： 1086K
代理商： USB3450
Hi-Speed USB Host or Device PHY With UTMI+ Interface
Datasheet
SMSC USB3450
37
Revision 0.1 (05-11-05)
DATASHEET
7.12
Detection of Resume
Resume signaling always takes place in FS mode (TERMSELECT and XCVRSELECT = FS enabled),
so the behavior for a HS device is identical to that of a FS device. The Link uses the LINESTATE
signals to determine when the USB transitions from the 'J' to the 'K' state and finally to the terminating
FS EOP (SE0 for 1.25us-1.5μs.).
The resume signaling (FS 'K') will be asserted for at least 20ms. At the beginning of this period the
Link may negate SUSPENDN, allowing the transceiver (and its oscillator) to power up and stabilize.
The FS EOP condition is relatively short. Links that simply look for an SE0 condition to exit suspend
mode do not necessarily give the transceiver’s clock generator enough time to stabilize. It is
recommended that all Link implementations key off the 'J' to 'K' transition for exiting suspend mode
(SUSPENDN = 1). And within 1.25μs after the transition to the SE0 state (low-speed EOP) the Link
must enable normal operation, i.e. enter HS or FS mode depending on the mode the device was in
when it was suspended.
Figure 7.7 Resume Timing Behavior (HS Mode)
Table 7.9 Resume Timing Values (HS Mode)
TIMING
PARAMETER
DESCRIPTION
VALUE
T0
Internal device event initiating the resume
process
0 (reference)
T1
Device asserts FS 'K' on the bus to signal
resume request to downstream port
T0 < T1 < T0 + 10ms.
T2
The device releases FS 'K' on the bus. However
by this time the 'K' state is held by downstream
port.
T1 + 1.0ms < T2 < T1 + 15ms
T3
Downstream port asserts SE0.
T1 + 20ms
T4
Latest time at which a device, which was
previously in HS mode, must restore HS mode
after bus activity stops.
T3 + 1.33μs {2 Low-speed bit times}
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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