lan9211 Standard Microsystems Corp., lan9211 Datasheet - Page 59
lan9211
Manufacturer Part Number
lan9211
Description
Lan9211 High-performance Small Form Factor Single-chip Ethernet Controller With Hp Auto-mdix Support
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9211.pdf
(146 pages)
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Quantity
Price
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Part Number:
lan9211-ABZJ
Manufacturer:
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Quantity:
3
Part Number:
lan9211-ABZJ
Manufacturer:
SMSC
Quantity:
20 000
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High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support
Datasheet
SMSC LAN9211
TX Checksum Enable = 1
TX Command 'A'
Buffer End Alignment = 1
Data Start Offset = 4
First Segment = 1
Last Segment = 0
Buffer Size = 4
TX Command 'B'
Packet Length = 115
Checksum Preamble
TX Checksum Location = 50
TX Checksum Start Pointer = 14
TX Command 'A'
Buffer End Alignment = 1
Data Start Offset = 7
First Segment = 0
Last Segment = 0
Buffer Size = 79
TX Command 'B'
Packet Length = 115
TX Checksum Enable = 1
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 = 115
TX Checksum Enable = 1
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 = 115
TX Checksum Enable = 1
31
31
31
31
Ethernet Controller
Data Written to the
TX Checksum Preamble
4-Byte Data Start Offset
7-Byte Data Start Offset
17-Byte Payload Data
5-Byte End Padding
8-Byte End Padding
End Offset Padding
Data Start Offset
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'B'
79-Byte Payload
15-Byte Payload
Pad DWORD 1
End Padding
10-Byte
10-Byte
10-Byte
Figure 3.17 TX Example 3
1B
DATASHEET
0
0
0
0
59
NOTE: When enabled, the TX Checksum
P r e a m b l e i s p r e - p e n d e d t o d a t a t o b e
transmitted. The FS bit in TX Command 'A', the
CK bit in TX Command 'B' and the TXCOE_EN
bit in the COE_CR register must all be set for
the TX checksum to be generated. FS must
not be set for subsequent fragments of the
same packet.
Data Passed to the
TX Checksum Preamble
TX Data FIFO
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'A'
TX Command 'A'
79-Byte Payload
15-Byte Payload
17-Byte Payload
NOTE: Extra bytes
between buffers are
not transmitted
Revision 2.3 (08-06-08)
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