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SRIX4K 数据表(PDF) 31 Page - STMicroelectronics |
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SRIX4K 数据表(HTML) 31 Page - STMicroelectronics |
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31 / 47 page ![]() SRIX4K SRIX4K commands 31/47 9.3 Slot_marker(SN) command Command code = x6h The SRIX4K must be in Inventory state to interpret the Slot_marker(SN) command. The Slot_marker byte code is divided into two parts: ● b3 to b0: 4-bit command code with fixed value 6. ● b7 to b4: 4 bits known as the Slot_number (SN). They assume a value between 1 and 15. The value 0 is reserved by the Pcall16() command. On receiving the Slot_marker() command, the SRIX4K compares its Chip_slot_number value with the Slot_number value given in the command code. If they match, the SRIX4K returns its Chip_ID value. If not, the SRIX4K does not send any response. The Slot_marker() command, used together with the Pcall16() command, allows the reader to search for all the Chip_IDs when there are more than one SRIX4K device in Inventory state present in the reader field range. Figure 30. Slot_marker request format Request parameter: ● x: Slot number Figure 31. Slot_marker response format Response parameters: ● Chip_ID of the SRIX4K Figure 32. Slot_marker frame exchange between reader and SRIX4K SOF SLOT_MARKER CRCL CRCH EOF AI07675 X6h 8 bits 8 bits SOF Chip_ID CRCL CRCH EOF AI07671 8 bits 8 bits 8 bits SOF X6h CRCL CRCH EOF AI07676b Reader SRIX4K SOF Chip_ID CRCL CRCH EOF <-t0-><-t1-> |
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