LAN9211 datasheet(57/147 Pages) SMSC

Part #	LAN9211

Description	High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

PDF	147 Pages

Scroll/Zoom	100%

Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

Datasheet

SMSC LAN9211

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'

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

LAN9211 Datasheet(PDF) 57 Page - SMSC Corporation