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SRI512 датащи(PDF) 32 Page - STMicroelectronics |
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SRI512 датащи(HTML) 32 Page - STMicroelectronics |
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32 / 47 page ![]() SRI512 commands SRI512 32/47 8.4 Select(Chip_ID) command Command code = 0Eh The Select() command allows the SRI512 to enter the Selected state. Until this command is issued, the SRI512 will not accept any other command, except for Initiate(), Pcall16() and Slot_marker(). The Select() command returns the 8 bits of the Chip_ID value. An SRI512 in Selected state, that receives a Select() command with a Chip_ID that does not match its own is automatically switched to Deselected state. Figure 32. Select request format Request parameter: ● 8-bit Chip_ID stored during the anticollision sequence Figure 33. Select response format Response parameters: ● Chip_ID of the selected tag. Must be equal to the transmitted Chip_ID Figure 34. Select frame exchange between reader and SRI512 SOF Select CRCL CRCH EOF AI07677b 0Eh 8 bits 8 bits 8 bits Chip_ID SOF Chip_ID CRCL CRCH EOF AI07671 8 bits 8 bits 8 bits AI10945 Reader SRI512 SOF Chip_ID CRCL CRCH EOF <-t0-> <-t1-> SOF 0Eh CRCL CRCH EOF Chip_ID |
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