LAN9115 datasheet(43/114 Pages) MICROCHIP

Teilenummer	LAN9115

Bauteilbeschribung	Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

PDF	114 Pages

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Hersteller	MICROCHIP [Microchip Technology]

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 2005-2016 Microchip Technology Inc.

DS00002269A-page 43

LAN9115

3.13.6

TRANSMIT EXAMPLES

3.13.6.1

TX Example 1

In this example a single, 111-Byte Ethernet packet will be transmitted. This packet is divided into three buffers. The three

buffers are as follows:

Buffer 0:

• 7-Byte “Data Start Offset”

• 79-Bytes of payload data

• 16-Byte “Buffer End Alignment”

Buffer 1:

• 0-Byte “Data Start Offset”

• 15-Bytes of payload data

• 16-Byte “Buffer End Alignment”

Buffer 2:

• 10-Byte “Data Start Offset”

• 17-Bytes of payload data

• 16-Byte “Buffer End Alignment”

Figure 3-15, "TX Example 1" illustrates the TX command structure for this example, and also shows how data is passed

to the TX data FIFO.

Note 3-16

The LAN9115 host bus interface supports 16-bit bus transfers; internally, all data paths are 32-bits

wide. Figure 3-15 and Figure 3-16 describe the host write ordering for pairs of atomic 16-bit

transactions.

LAN9115 Datenblatt(PDF) 43 Page - Microchip Technology