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AS3953A-BSWB Datasheet(PDF) 2 Page - ams AG |
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AS3953A-BSWB Datasheet(HTML) 2 Page - ams AG |
2 / 42 page www.ams.com Revision 1.0 2 - 42 AS3953 Datasheet - C o n t en t s Contents 1 General Description .................................................................................................................................................................. 1 2 Key Features............................................................................................................................................................................. 1 3 Applications............................................................................................................................................................................... 1 4 Pin Assignments ....................................................................................................................................................................... 4 4.1 Pin Descriptions.................................................................................................................................................................................... 5 5 Absolute Maximum Ratings ...................................................................................................................................................... 6 6 Electrical Characteristics........................................................................................................................................................... 7 6.1 Operating Conditions............................................................................................................................................................................ 7 6.2 DC/AC Characteristics for Digital Inputs and Outputs.......................................................................................................................... 7 6.3 Electrical Specification.......................................................................................................................................................................... 8 7 Detailed Description.................................................................................................................................................................. 9 7.1 Circuit ................................................................................................................................................................................................... 9 7.2 PICC AFE............................................................................................................................................................................................. 9 7.3 Power Manager .................................................................................................................................................................................. 11 7.4 ISO 14443A Framing Mode................................................................................................................................................................ 11 7.5 ISO 14443A Level-4 Protocol Mode................................................................................................................................................... 12 7.5.1 Coding of UID ............................................................................................................................................................................ 12 7.5.2 Coding of ATQA, SAK and ATS ................................................................................................................................................ 13 7.6 Proprietary Commands....................................................................................................................................................................... 15 7.6.1 Passing of Block Data to Controller ........................................................................................................................................... 17 7.6.2 Use of CID ................................................................................................................................................................................. 17 7.7 ISO 14443A Level-3 Protocol Mode................................................................................................................................................... 17 7.8 Transparent Mode .............................................................................................................................................................................. 18 7.9 EEPROM............................................................................................................................................................................................ 18 7.9.1 UID Word ................................................................................................................................................................................... 18 7.9.2 Fabrication Data Word............................................................................................................................................................... 18 7.9.3 Configuration Word.................................................................................................................................................................... 19 7.9.4 OTP Words ............................................................................................................................................................................... 21 7.9.5 Write Lock Word ........................................................................................................................................................................ 21 7.9.6 Read Lock Word ........................................................................................................................................................................ 21 8 Application Information ........................................................................................................................................................... 22 8.1 SPI Interface....................................................................................................................................................................................... 22 8.1.1 Writing of Data to Addressable Registers (Register Write Mode).............................................................................................. 23 8.1.2 Reading of Data from Addressable Registers (Register Read Mode) ....................................................................................... 24 8.1.3 Writing and Reading of EEPROM Through SPI ........................................................................................................................ 24 8.1.4 Loading Transmitting Data into FIFO......................................................................................................................................... 25 8.1.5 Reading Received Data from FIFO ........................................................................................................................................... 25 8.1.6 Direct Command Mode.............................................................................................................................................................. 26 8.1.7 SPI Timing ................................................................................................................................................................................. 26 8.1.8 Interrupt Interface ...................................................................................................................................................................... 28 8.1.9 FIFO Water Level and FIFO Status Register............................................................................................................................. 28 8.1.10 ISO 14443A Frame Data in FIFO ............................................................................................................................................ 29 8.2 Direct Commands............................................................................................................................................................................... 29 8.2.1 Set Default ................................................................................................................................................................................. 29 8.2.2 Clear .......................................................................................................................................................................................... 29 |
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