AS3910-BQFT austriamicrosystems, AS3910-BQFT Datasheet - Page 3

• Manufacturer Part Number: AS3910-BQFT
• Description: IC RFID READER SPI 32-QFN
• Manufacturer: austriamicrosystems

Specifications of AS3910-BQFT

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO14443A, ISO1443B
• Package / Case: 32-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS3910-BQFTTR

AS3910
Data Sheet - C o n t e n t s
Contents
1 General Description
2 Key Features
3 Applications
4 Pin Assignments
5 Absolute Maximum Ratings
6 Electrical Characteristics
7 Detailed Description
8 Application Information
www.austriamicrosystems.com/HF_RFID_Reader/AS3910
4.1 Pin Descriptions
8.1 Operating Modes ................................................................................................................................................................................ 13
8.2 Transmitter
8.3 Receiver
8.4 A/D Converter
8.5 Phase and Amplitude Detector
8.6 External Field Detector ....................................................................................................................................................................... 15
8.7 Quartz Crystal Oscillator
8.8 Power Supply, Regulators
8.9 Communication to External Microcontroller
7.0.1 Transmitter ................................................................................................................................................................................. 11
7.0.2 Receiver ..................................................................................................................................................................................... 11
7.0.3 Phase and Amplitude Detector .................................................................................................................................................. 11
7.0.4 A/D Converter ............................................................................................................................................................................ 11
7.0.5 External Field Detector .............................................................................................................................................................. 11
7.0.6 Quartz Crystal Oscillator ............................................................................................................................................................ 11
7.0.7 Power Supply Regulators .......................................................................................................................................................... 11
7.0.8 POR and Bias ............................................................................................................................................................................ 11
7.0.9 ISO-14443 and NFCIP Framing ................................................................................................................................................ 12
7.0.10 FIFO ......................................................................................................................................................................................... 12
7.0.11 Control Logic ............................................................................................................................................................................ 12
7.0.12 SPI Interface ............................................................................................................................................................................ 12
8.3.1 Gain Reduction, AGC and Squelch ........................................................................................................................................... 14
8.3.2 RSSI .......................................................................................................................................................................................... 14
8.3.3 AM and PM Demodulation ......................................................................................................................................................... 14
8.5.1 Phase Detector .......................................................................................................................................................................... 15
8.5.2 Amplitude Detector .................................................................................................................................................................... 15
8.6.1 Target Activation Detector ......................................................................................................................................................... 15
8.6.2 RF Collision Avoidance Detector ............................................................................................................................................... 15
8.9.1 Serial Peripheral Interface (SPI) ................................................................................................................................................ 17
8.9.2 SPI Operation MODE Bits ......................................................................................................................................................... 17
8.9.3 Writing of Data to Addressable Registers (WRITE Mode) ......................................................................................................... 17
8.9.4 Reading of Data from Addressable Registers (READ Mode) .................................................................................................... 18
8.9.5 Sending Direct Commands ........................................................................................................................................................ 19
8.9.6 Loading Transmitting Data into FIFO ......................................................................................................................................... 19
8.9.7 Reading Received Data from FIFO ........................................................................................................................................... 19
8.9.8 Interrupt Interface ...................................................................................................................................................................... 19
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