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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN3985 датащи(PDF) 94 Page - STMicroelectronics |
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AN3985 датащи(HTML) 94 Page - STMicroelectronics |
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94 / 105 page  Application example AN3985 94/105 Doc ID 022255 Rev 2 Figure 12. Halt CR95HF Timer mode flowchart 8.1.9 Communication test While waiting for an answer from the CR95HF, a timer is launched and the polling procedure is active during a limited period. If, at the end of this period, no answer is ready, the STM8L assumes that no answer will come and it increments a global counter called communication_watchdog. At the end of the secondary loop, this counter is checked and compared with a maximum value of tolerance. If it overtakes this value, a procedure is launched in order to resume the communication possibly lost. MS19968V1 Start of CR95HF Timer Mode End of Wait for interrupt mode Turn CR95HF in Idle mode CR95HF timeout = 5s ? No No Yes CR95HF Detect a tag ? No Yes Tag detected ? Yes Turn STM8L in halt mode Wake Up CR95HF Wake Up STM8L Check Wake up cause |
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