AS3909 datasheet(76/77 Pages) AMSCO

76 / 77 page

AS3909/AS3910 – 76

ams Datasheet, Confidential: 2013-Oct [3-02]

Ref e r e nc e Gu ide

Reading of Data from Addressable Registers (READ

Mode)

Sending Direct Commands

Loading Transmitting Data into FIFO

Reading Received Data from FIFO

Interrupt Interface

FIFO Water Level and FIFO Status Register

Direct Commands

Set Default

Clear

Transmit Commands

NFC Transmit Commands

Mask Receive Data and Unmask Receive Data

AD Convert

Measure RF

Squelch

Clear Squelch

Adjust Regulators

Calibrate Modulation Depth

Calibrate Antenna

Check Antenna Resonance

Clear RSSI

Transparent Mode

Registers

Main Registers

Configuration Registers

Interrupt Register and Associated Registers

A/D Converter Output Register

Antenna Calibration Registers

AM Modulation Depth and Antenna Driver Registers

NFCIP Field Detection Threshold Register

Regulator Registers

Receiver State Display Register

Typical Operating Sequence

ISO-14443 Reader Operation

Transmit and Receive In Case Data Packet is Longer Than

FIFO

NFCIP-1 Operation

NFCIP Target

NFCIP Initiator

ISO-14443A SELECT SEQUENCE

REQA and WUPA

ANTICOLLISION

Collision Detection

SELECT

Receiving 4-Bit Tag Response Frame

AM Modulation Depth: Definition and Calibration

AM Modulation Depth Definition Using Direct Com-

mand Calibrate Modulation Depth

Execution of Direct Command Calibrate Modulation

Depth

AM Modulation Depth Definition Using Antenna Driver

AM Modulated Level Definition Register (#12)

Antenna LC Tank Resonance: Checking and Calibration

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