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전자부품 데이터시트 검색엔진 |
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LAN9117 데이터시트(HTML) 45 Page - Microchip Technology |
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LAN9117 데이터시트(HTML) 45 Page - Microchip Technology |
45 / 114 page ![]() 2005-2016 Microchip Technology Inc. DS00002267A-page 45 LAN9117 3.13.6.2 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 3-16, "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 3-16: TX EXAMPLE 2 TX Command 'A' 0 31 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 |
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