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LAN9211 датащи(PDF) 57 Page - SMSC Corporation

номер детали LAN9211
подробное описание детали  High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support
PDF  147 Pages
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производитель  SMSC [SMSC Corporation]
домашняя страница  http://www.smsc.com
Logo SMSC - SMSC Corporation

LAN9211 датащи(HTML) 57 Page - SMSC Corporation

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High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support
Datasheet
SMSC LAN9211
57
Revision 2.9 (03-01-12)
DATASHEET
3.12.6.2
TX Example 2
In this example, a single 183-Byte Ethernet packet will be transmitted. This packet is in a single buffer
as follows:
2-Byte “Data Start Offset”
183-Bytes of payload data
4-Byte “Buffer End Alignment”
Figure 3.22, "TX Example 2" illustrates the TX command structure for this example, and also shows
how data is passed to the TX data FIFO. Note that the packet resides in a single TX Buffer, therefore
both the FS and LS bits are set in TX command ‘A’.
Figure 3.22 TX Example 2
TX Command 'A'
0
31
TX Command 'B'
Data Written to the
Ethernet Controller
TX Command 'B'
183-Byte Payload Data
Data Start Offset = 6
First Segment = 1
Last Segment = 1
Buffer Size =183
Packet Length = 183
TX Command 'A'
TX Command 'B'
Data Passed to the
TX Data FIFO
Buffer End Alignment = 0
3B End Padding
TX Command 'A'
6-Byte Data Start Offset
183-Byte Payload Data
NOTE: Extra bytes between buffers
are not transmitted



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