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SRT512 датащи(PDF) 28 Page - STMicroelectronics |
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SRT512 датащи(HTML) 28 Page - STMicroelectronics |
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28 / 46 page ![]() SRT512 commands SRT512 28/46 8.1 Initiate() command Command code = 06h - 00h Initiate() is used to initiate the anticollision sequence of the SRT512. On receiving the Initiate() command, all SRT512 devices in Ready state switch to Inventory state, set a new 8-bit Chip_ID random value, and return their Chip_ID value. This command is useful when only one SRT512 in Ready state is present in the reader field range. It speeds up the Chip_ID search process. The Chip_slot_number is not used during Initiate() command access. Figure 22. Initiate request format Request parameter: ● No parameter Figure 23. Initiate response format Response parameter: ● Chip_ID of the SRT512 Figure 24. Initiate frame exchange between reader and SRT512 SOF Initiate CRCL CRCH EOF AI07670b 06h 00h 8 bits 8 bits SOF Chip_ID CRCL CRCH EOF AI07671 8 bits 8 bits 8 bits AI13507b Reader SRT512 SOF Chip_ID CRCL CRCH EOF <-t0-> <-t1-> SOF 06h CRCL CRCH EOF 00h |
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