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OM25180FDKM Datasheet(PDF) 32 Page - NXP Semiconductors |
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OM25180FDKM Datasheet(HTML) 32 Page - NXP Semiconductors |
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32 / 149 page  PN5180 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.0 — 7 October 2016 240930 32 of 149 NXP Semiconductors PN5180 High-performance multi-protocol full NFC Forum-compliant frontend EPC_RESUME_INVENTORY Description: This instruction is used to resume the inventory algorithm for the ISO18000-3M3 Inventory in case it is paused. This instruction has to be repeatedly called, as long as 'Response Size' field in EPC_RETRIEVE_INVENTORY_RESULT_SIZE is greater than 0. A typical sequence for a complete EPC GEN2 inventory retrieval is: 1. Execute EPC_INVENTORY to start the inventory 2. Execute EPC_RETRIEVE_INVENTORY_RESULT_SIZE 3. If size is 0, inventory has finished. 4. Otherwise, execute EPC_RETRIEVE_INVENTORY_RESULT 5. Execute EPC_RESUME_INVENTORY and proceed with step 2. Condition: Field 'RFU' must be present and can be set to any value. If the condition is not fulfilled, an exception is raised. EPC_RETRIEVE_INVENTORY_RESULT_SIZE Description: This instruction is used to retrieve the size of the inventory result. The size is located in the response to this instruction and reflects the payload size of the response to the next execution of EPC_RETRIEVE_INVENTORY_RESULT. If the size is 0, then no more results are available which means inventory algorithm has finished. Condition: Field Parameter1 must be present. If the condition is not fulfilled, an exception is raised. Table 28. EPC_RESUME_INVENTORY PARAMETERS Payload Length (byte) Value/Description Command code 1 0x0E Parameter 1 0x00 Response 0 - Table 29. EPC_RETRIEVE_INVENTORY_RESULT_SIZE PARAMETERS Payload length (byte) Value/Description Command code 1 0x0F Parameter 1 0x00 Response 2 Response size: If Response size == 0: Inventory has finished. If Response size == 1...512: Value indicates the length of the EPC_RETRIEVE_INVENTORY_RESULT response payload |
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