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ST25DV04K Datasheet(PDF) 102 Page - STMicroelectronics |
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ST25DV04K Datasheet(HTML) 102 Page - STMicroelectronics |
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102 / 220 page ![]() RF operations ST25DV04K ST25DV16K ST25DV64K 102/220 DocID027603 Rev 4 Figure 33. ST25DVxxx state transition diagram 1. The ST25DVxxx returns to the Power Off state if the tag is out of the RF field for at least tRF_OFF. The intention of the state transition method is that only one ST25DVxxx should be in the Selected state at a time. When the Select_flag is set to 1, the request shall NOT contain a unique ID. When the address_flag is set to 0, the request shall NOT contain a unique ID. Table 55. ST25DVxxx response depending on Request_flags Flags Address_flag Select_flag 1 Addressed 0 Non addressed 1 Selected 0 Non selected ST25DVxxx in Ready or Selected state (Devices in Quiet state do not answer) -X - X ST25DVxxx in Selected state - X X - ST25DVxxx in Ready, Quiet or Selected state (the device which matches the UID) X- - X Error (03h) or no response (command dependent) X- X - |
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