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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UPD77533 датащи(PDF) 41 Page - Renesas Technology Corp |
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UPD77533 датащи(HTML) 41 Page - Renesas Technology Corp |
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41 / 104 page  Data Sheet S15671EJ4V0DS 39 µµµµPD77533 12.2 Packet Division The total length of the data in an unpacketed state in a server command or server command response sometimes exceeds 255 bytes. In this case, the host CPU cannot fit all the data in a single packet, and therefore divides the data into multiple packets. The data in local or extension commands cannot be divided and sent in multiple packets; the command must fit completely into a single packet. Figure 12-2. Example of Single Packet Figure 12-3. Example of Data Divided into Multiple Packets 12.3 Extension Command Format Extension commands (CMD-ID = 0x7F) contain an additional EXT-ID field, which identifies the command. Figure 12-4. Extension Command Format FLAG DATA CMD-ID Original data FLAG = 0x03 FLAG DATA CMD-ID Original data FLAG = 0x03 FLAG DATA CMD-ID FLAG DATA CMD-ID FLAG = 0x02 1 byte CMD-ID FLAG LENGTH DATA 1 byte 1 byte Variable length Number of bytes indicated by LENGTH 1 byte EXT-ID 0x7F |
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