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AS3909 Datasheet(PDF) 76 Page - ams AG

Part # AS3909
Description  13.56 MHz RFID Reader IC, ISO-14443 A/B
PDF  77 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3909 Datasheet(HTML) 76 Page - ams AG

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AS3909/AS3910 – 76
ams Datasheet, Confidential: 2013-Oct [3-02]
Ref e r e nc e Gu ide
25
Reading of Data from Addressable Registers (READ
Mode)
25
Sending Direct Commands
26
Loading Transmitting Data into FIFO
27
Reading Received Data from FIFO
27
Interrupt Interface
28
FIFO Water Level and FIFO Status Register
28
Direct Commands
29
Set Default
30
Clear
30
Transmit Commands
30
NFC Transmit Commands
31
Mask Receive Data and Unmask Receive Data
31
AD Convert
32
Measure RF
32
Squelch
32
Clear Squelch
32
Adjust Regulators
33
Calibrate Modulation Depth
33
Calibrate Antenna
33
Check Antenna Resonance
33
Clear RSSI
34
Transparent Mode
34
Registers
34
Main Registers
36
Configuration Registers
41
Interrupt Register and Associated Registers
44
A/D Converter Output Register
45
Antenna Calibration Registers
46
AM Modulation Depth and Antenna Driver Registers
48
NFCIP Field Detection Threshold Register
50
Regulator Registers
52
Receiver State Display Register
54
Typical Operating Sequence
54
ISO-14443 Reader Operation
55
Transmit and Receive In Case Data Packet is Longer Than
FIFO
55
NFCIP-1 Operation
55
NFCIP Target
56
NFCIP Initiator
57
ISO-14443A SELECT SEQUENCE
57
REQA and WUPA
57
ANTICOLLISION
58
Collision Detection
59
SELECT
59
Receiving 4-Bit Tag Response Frame
60
AM Modulation Depth: Definition and Calibration
60
AM Modulation Depth Definition Using Direct Com-
mand Calibrate Modulation Depth
61
Execution of Direct Command Calibrate Modulation
Depth
62
AM Modulation Depth Definition Using Antenna Driver
AM Modulated Level Definition Register (#12)
63
Antenna LC Tank Resonance: Checking and Calibration



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