LAN9312 datasheet(129/458 Pages) SMSC

129 / 458 page

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

SMSC LAN9312

129

Revision 1.2 (04-08-08)

DATASHEET

17-Bytes of payload data

16-Byte “Buffer End Alignment”

Figure 9.5 illustrates the TX command structure for this example, and also shows how data is passed

to the TX Data FIFO.

Figure 9.5 TX Example 1

TX Command 'A'

TX Command 'B'

Pad DWORD 1

7-Byte Data Start Offset

10-Byte

End Padding

79-Byte Payload

Buffer End Alignment = 1

Data Start Offset = 7

First Segment = 1

Last Segment = 0

Buffer Size = 79

Packet Length = 111

TX Command 'A'

TX Command 'B'

10-Byte

End Offset Padding

15-Byte Payload

Buffer End Alignment = 1

Data Start Offset = 0

First Segment = 0

Last Segment = 0

Buffer Size = 15

Packet Length = 111

TX Command 'A'

TX Command 'B'

Buffer End Alignment = 1

Data Start Offset = 10

First Segment = 0

Last Segment = 1

Buffer Size = 17

Packet Length = 111

10-Byte

Data Start Offset

TX Command 'A'

TX Command 'B'

TX Command 'A'

TX Command 'B'

TX Command 'A'

TX Command 'B'

NOTE: Extra bytes

between buffers are

not transmitted

Data Written to the

Memory Mapped

TX Data FIFO Port

Data Passed to the

TX Data FIFO

5-Byte End Padding

17-Byte Payload Data

TX Command 'A'

TX Command 'B'

TX Command 'A'

79-Byte Payload

15-Byte Payload

17-Byte Payload

LAN9312 Datasheet(PDF) 129 Page - SMSC Corporation

LAN9312 Datasheet(HTML) 129 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL