LAN9311i SMSC [SMSC Corporation], LAN9311i Datasheet - Page 130
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LAN9311i
Manufacturer Part Number
LAN9311i
Description
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.LAN9311I.pdf
(459 pages)
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Revision 1.6 (08-18-09)
Figure 9.5
to the TX Data FIFO.
TX Command 'A'
Buffer End Alignment = 1
Data Start Offset = 7
First Segment = 1
Last Segment = 0
Buffer Size = 79
TX Command 'B'
Packet Length = 111
TX Command 'A'
Buffer End Alignment = 1
Data Start Offset = 0
First Segment = 0
Last Segment = 0
Buffer Size = 15
TX Command 'B'
Packet Length = 111
TX Command 'A'
Buffer End Alignment = 1
Data Start Offset = 10
First Segment = 0
Last Segment = 1
Buffer Size = 17
TX Command 'B'
Packet Length = 111
illustrates the TX command structure for this example, and also shows how data is passed
31
31
31
Data Written to the
TX Data FIFO Port
Memory Mapped
7-Byte Data Start Offset
17-Byte Payload Data
5-Byte End Padding
End Offset Padding
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'B'
Data Start Offset
79-Byte Payload
15-Byte Payload
Pad DWORD 1
End Padding
10-Byte
10-Byte
10-Byte
Figure 9.5 TX Example 1
DATASHEET
1B
130
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
0
0
0
Data Passed to the
TX Data FIFO
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'A'
79-Byte Payload
15-Byte Payload
17-Byte Payload
NOTE: Extra bytes
between buffers are
not transmitted
SMSC LAN9311/LAN9311i
Datasheet
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