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USB2502-HT 数据表(PDF) 36 Page - SMSC Corporation

部件名 USB2502-HT
功能描述  2-Port USB 2.0 Hub Controller
PDF  44 Pages
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制造商  SMSC [SMSC Corporation]
网页  http://www.smsc.com
标志 SMSC - SMSC Corporation

USB2502-HT 数据表(HTML) 36 Page - SMSC Corporation

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2-Port USB 2.0 Hub Controller
Datasheet
Revision 2.1 (12-06-06)
36
SMSC USB2502
DATASHEET
5.6.2
USB Bus Reset
In response to the upstream port signaling a reset to the Hub, the Hub does the following:
Note:
The Hub does not propagate the upstream USB reset to downstream devices.
1. Sets default address to 0.
2. Sets configuration to: Unconfigured.
3. Negates PRTPWR to all downstream ports.
4. Clears all TT buffers.
5. Moves device from suspended to active (if suspended).
6. Complies with Section 11.10 of the USB 2.0 Specification for behavior after completion of the reset
sequence.
The Host then configures the Hub and the Hub’s downstream port devices in accordance with the USB
Specification.



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