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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LAN9117 데이터시트(PDF) 38 Page - Microchip Technology |
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LAN9117 데이터시트(HTML) 38 Page - Microchip Technology |
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38 / 114 page  LAN9117 DS00002267A-page 38 2005-2016 Microchip Technology Inc. 3.13.1 TX BUFFER FORMAT TX buffers exist in the host’s memory in a given format. The host writes a TX command word into the TX data buffer before moving the Ethernet packet data. The TX command A and command B are 32-bit values that are used by the LAN9117 in the handling and processing of the associated Ethernet packet data buffer. Buffer alignment, segmentation and other packet processing parameters are included in the command structure. The following diagram illustrates the buffer format. FIGURE 3-13: SIMPLIFIED HOST TX FLOW DIAGRAM Idle Check available FIFO space init Write TX Command Write Buffer Last Buffer in Packet Not Last Buffer Write Start Padding (optional) Read TX Status (optional) TX Status Available |
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