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AS3953B Datasheet(PDF) 19 Page - ams AG |
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AS3953B Datasheet(HTML) 19 Page - ams AG |
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19 / 64 page  ams Datasheet Page 19 [v1-04] 2016-Jan-07 Document Feedback AS3953B − Detailed Description Figure below defines the coding of the TC(1) byte. Figure 23: TC(1) Byte Coding Proprietary Commands Proprietary commands have the same format as blocks defined in ISO 14443-4 with the difference that optional NAD field is abandoned since NAD is not supported by the AS3953B. The same format is used for commands sent by PCD and AS3953B responses. Figure below defines the coding of the Proprietary commands. Figure 24: Proprietary Commands Coding Prologue field consists of the mandatory Protocol Control Byte and an optional Card Identifier Byte. Card identifier byte is according to ISO 14443-4 definition. Epilogue field contains CRC over transmitted block. b8 MSB b7 b6 b5 b4 b3 b2 b1 LSB Description 0 0000010 Coding of ATS byte TC(1) CID NAD Prologue Field Information Field Epilogue Field PCB [CID] INF EDC 1 byte 1 byte 2 bytes |
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