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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