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LAN9500AI 数据表(PDF) 29 Page - Microchip Technology |
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LAN9500AI 数据表(HTML) 29 Page - Microchip Technology |
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29 / 213 page  2010 - 2015 Microchip Technology Inc. DS00001875A-page 29 LAN950x In the case where the Bulk Out packet is errored, the URX does not respond to the Host. The URX will request that the FCT rewinds the packet. It is the Hosts responsibility to retransmit the packet at a later time. The FCT notifies the URX when it detects loss of sync. When this occurs, the URX stalls the Bulk Out pipe. This is an appropriate response, as loss of sync is a catastrophic error. This behavior is configurable via the Hardware Configura- tion Register (HW_CFG) on page 122. FIGURE 5-3: USB BULK OUT TRANSACTION SUMMARY Host Function Out Token Data Out Transfer ACK NYET STALL Ping Data Error ACK NAK NAK FS/HS HS Only |
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