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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADIN1110BCPZ-R7 датащи(PDF) 32 Page - Analog Devices |
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ADIN1110BCPZ-R7 датащи(HTML) 32 Page - Analog Devices |
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32 / 104 page  Data Sheet ADIN1110 MAC SPI analog.com Rev. 0 | 32 of 104 The OPEN Alliance SPI protocol defines two types of transactions: data transactions for Ethernet frame transfers and control transac- tions for register read/write operations. A chunk is the basic element of data transactions, and they are composed of 4 bytes of overhead plus the configured payload size. Data transactions consist of an equal number of transmit and receive chunks. Chunks in both transmit and receive directions may or may not contain valid frame data independent from each other, allowing for the simultaneous transmission and reception of different length frames. The data header of the chunk in transmit frames, and the data footer in receive frames, indicate which bytes of the payload contain valid frame data. For full information on the OPEN Alliance SPI protocol used by the ADIN1110, refer to OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface v1.0. Note that CS has to be deasserted between data transactions and control transactions, as shown in Figure 22. Figure 22. Ethernet Data Frame Transfer Followed by Control Transfer |
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