LAN9500 Datasheet, PDF (29/213 Pages) SMSC Corporation – USB 2.0 to 10/100 Ethernet Controller Promiscuous mode

LAN950x
FIGURE 5-3:
USB BULK OUT TRANSACTION SUMMARY
Host Function
Out Token
FS/HS HS Only
Data Out
Transfer
ACK
NAK
NYET
STALL
Data Error
Ping
ACK
NAK
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.
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DS00001875A-page 29