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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) 46 Page - Renesas Technology Corp |
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UPD77533 датащи(HTML) 46 Page - Renesas Technology Corp |
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46 / 104 page  Data Sheet S15671EJ4V0DS 44 µµµµPD77533 13.2.2 ACK, NACK in case of extension command Some extension commands use ACK and NACK, and some do not. If NACK is sent from the host CPU to the µPD77533, the same packet is re-sent. The µPD77533 can send the next packet after receiving ACK from the host CPU. When a flow point is output from the µPD77533 to the host CPU, the host CPU must send either ACK or NACK. The µPD77533 stops outputting packets until this ACK or NACK is received. Table 13-5. ACK, NACK for Extension Commands Command type EXT-ID ACK, NACK Control Flow point setting command 0x00 Not controlled Flow point output Other than 0x00 Controlled (1) Flow point setting command See Figure 13-1 Local Command Flow. (2) Flow point output Figure 13-2. Flow Point Flow PD77533 µ Host CPU Flow point output Packet re-sent Example of normal flow ACK (format 2) Flow point output Timeout or error occurrence Flow point output ACK (format 2) NACK Example of abnormal flow |
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