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AS3910 DB 产品封装文件 - AMS（奥地利微电子）
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AMS（奥地利微电子）
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RF射频器件
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AS3910 DB数据手册
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www.austriamicrosystems.com/HF_RFID_Reader/AS3910 Revision 2.3 4 - 47
AS3910
Data Sheet - Contents
8.9.9 FIFO Water Level and FIFO Status Register ............................................................................................................................. 20
8.10 Direct Commands ............................................................................................................................................................................20
8.10.1 Set Default ............................................................................................................................................................................... 21
8.10.2 Clear ........................................................................................................................................................................................ 21
8.10.3 Transmit Commands ............................................................................................................................................................... 21
8.10.4 NFC Transmit Commands ....................................................................................................................................................... 21
8.10.5 Mask Receive Data and Unmask Receive Data ...................................................................................................................... 22
8.10.6 AD Convert .............................................................................................................................................................................. 22
8.10.7 Measure RF ............................................................................................................................................................................. 22
8.10.8 Squelch .................................................................................................................................................................................... 22
8.10.9 Clear Squelch .......................................................................................................................................................................... 22
8.10.10 Adjust Regulators .................................................................................................................................................................. 22
8.10.11 Calibrate Modulation Depth ................................................................................................................................................... 23
8.10.12 Calibrate Antenna .................................................................................................................................................................. 23
8.10.13 Check Antenna Resonance ................................................................................................................................................... 23
8.10.14 Clear RSSI ............................................................................................................................................................................. 23
8.10.15 Transparent Mode ................................................................................................................................................................. 23
8.11 Registers ..........................................................................................................................................................................................23
8.11.1 Main Registers ......................................................................................................................................................................... 24
8.11.2 Configuration Registers ........................................................................................................................................................... 25
8.11.3 Interrupt Register and Associated Registers ........................................................................................................................... 28
8.11.4 A/D Converter Output Register ................................................................................................................................................ 30
8.11.5 Antenna Calibration Registers ................................................................................................................................................. 31
8.11.6 AM Modulation Depth and Antenna Driver Registers .............................................................................................................. 32
8.11.7 NFCIP Field Detection Threshold Register .............................................................................................................................. 33
8.11.8 Regulator Registers ................................................................................................................................................................. 35
8.12 Typical Operating Sequence ............................................................................................................................................................37
8.12.1 ISO-14443 Reader Operation .................................................................................................................................................. 37
8.12.2 NFCIP-1 Operation .................................................................................................................................................................. 37
8.13 ISO-14443A SELECT SEQUENCE .................................................................................................................................................38
8.13.1 REQA and WUPA .................................................................................................................................................................... 38
8.13.2 ANTICOLLISION ..................................................................................................................................................................... 39
8.13.3 Collision Detection ................................................................................................................................................................... 39
8.13.4 SELECT ................................................................................................................................................................................... 39
8.14 Receiving 4Bit Tag Response Frame ...............................................................................................................................................40
8.15 AM Modulation Depth: Definition and Calibration ............................................................................................................................40
8.15.1 AM Modulation Depth Definition Using Direct Command Calibrate Modulation Depth ........................................................... 40
8.15.2 AM Modulation Depth Definition Using Antenna Driver AM Modulated Level Definition Register (#12) ................................. 41
8.16 Antenna LC Tank Resonance: Checking and Calibration ................................................................................................................41
8.16.1 Check Antenna Resonance ..................................................................................................................................................... 42
8.16.2 Calibrate Antenna Resonance ................................................................................................................................................. 42
8.17 Transparent Mode ............................................................................................................................................................................43
8.18 Active Receive – Use in ISO-14443B Anticollision ..........................................................................................................................44
8.19 ISO-14443B, Reduction of TR0 and TR1 and Suppression of EOF/SOF in PICC Response .........................................................44
8.20 Test Pins ...........................................................................................................................................................................................44
9 Package Drawings and Markings ........................................................................................................................................... 45
10 Ordering Information ............................................................................................................................................................. 47
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