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AS3953A

Datasheet - Contents

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