LAN9218 datasheet(49/133 Pages) SMSC

Part #	LAN9218

Description	High-Performance Single- Chip 10/100 Ethernet Controller with HP Auto-MDIX

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Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX

Datasheet

SMSC

LAN9218

49

Revision 1.8 (06-06-07)

DATASHEET

Figure 3.13, "TX Example 1" illustrates the TX command structure for this example, and also shows

how data is passed to the TX data FIFO.

Figure 3.13 TX Example 1

TXCommand'A'

0

31

TXCommand'B'

Pad DW ORD 1

7-Byte Data Start Offset

10-Byte

EndPa dding

79-BytePa yload

Buf f er End Alignment = 1

Data Start Of fset = 7

First Segment = 1

Last Segment = 0

Buf f er Size = 79

Packet Length = 111

TXCommand'A'

0

31

TXCommand'B'

10-Byte

EndOffsetPadding

15-BytePa yload

Buf f er End Alignment = 1

Data Start Of fset = 0

First Segment = 0

Last Segment = 0

Buf f er Size = 15

Packet Length = 111

TXCommand'A'

0

31

TXCommand'B'

Buf f er End Alignment = 1

Data Start Of fset = 10

First Segment = 0

Last Segment = 1

Buf f er Size = 17

Packet Length = 111

10-Byte

Data Start Offse t

TX Com m and 'A'

TX Com m and 'B'

TX Com m and 'A'

TX Com m and 'B'

TX Com m and 'A'

TX Com m and 'B'

NOTE: Extra bytes

betw een buf f ers are

not transmitted

Data W ritten to the

Ethernet Controller

Data Passed to the

TX Data FIFO

5-ByteEndPadding

17-BytePayloadData

TXCommand'A'

TXCommand'B'

TXCommand'A'

1B

79-BytePayload

15-BytePayload

17-BytePayload

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LAN9218 Datasheet(PDF) 49 Page - SMSC Corporation

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