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LAN9117 데이터시트(PDF) 43 Page - Microchip Technology

부품명 LAN9117
부품 상세설명  High Performance Single-Chip 10/100 Non-PCI Ethernet Controller
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9117 데이터시트(HTML) 43 Page - Microchip Technology

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 2005-2016 Microchip Technology Inc.
DS00002267A-page 43
LAN9117
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 LAN9117 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.


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