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Features
Contactless Interface
– Reads and Writes Passive RFID Tags in the Unlicensed 13.56 MHz Band
– Employs ISO/IEC14443 Type A Modulation Schemes
– Autonomous Operation Capability (can scan and read tags without host
intervention – i.e. only passes data following successful read/write operation)
– Compatible with NFC Initiation Only Device – User Has Control Over Initiation of all
RFID Based Services and Features
– Read/write Operation Between 1 cm and 10 cm Read Range, Depending on
Reader/Tag Antenna Coil Sizes and Orientation Relative to the Reader
– Collision Detection as Standard
– Transparent Modes for Software Controlled Modulation Supports Maximum
Flexibility and Future Protocols
– Fast Data Communication Rate of 106 kbit/s
– Suitable for Operation with a Wide Variety of Antenna Coil Sizes and Form Factors
– Four Software Adjustable Carrier Field Drive Levels
Controller and Software
– On-board Powerful Atmel AVR® RISC microcontroler, programmed with
Innovision® proprietary software.
– Built in Self Test and Diagnostic Modes
– Internal 8 MHz RC Oscillator for Micro or External Crystal Operation
Host Interface
– 3-wire SPI Interface as Standard
– Full Software Control via SPI bus at 115 Kbaud as Standard Interface
Power Supply
– Ultra Low Current Operation and Stand-by Sleep Mode Typically < 1 µA
– Ultra Low Voltage Operation: 2.7V - 3.3V
Additional features
– Packages: LBGA36
– LBGA Requires Only an External Crystal, 10 Passives and the Reader Antenna Coil
– Operating temperature range: -30°C to +80°C
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Integrated
13.56 MHz
Contactless
Reader with
Embeded
software
AT90RF135602
Description
AT90RF135602 is an ultra small footprint low-cost Radio Frequency Identification
(RFID) reader developed with Innovision Research & Technology plc to address
multi-protocol 13.56 MHz RFID applications.
It is optimised for use with the established ISO/IEC14443 type A standard and is avail-
able in Low-profile Ball Grid Array (LBGA).
The LBGA incorporates a custom transceiver front-end along with a protocol & com-
munications controller. It requires only an external crystal and minimal external
passive components to interface to the reader antenna.
Protocols are software defined and hence configurable.
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Benefits
Applications
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• Low-cost – ideal for RFID applications where costs have traditionally proved
prohibitive
• Ultra miniature footprint for compact reader design
• Low voltage operation ideal for rechargeable and/or portable applications
• Low operating current for optimal power utilisation
• Low quiescent current sleep mode further prolongs battery life of applications
• Easily integrated into host reader system
• Scalable on-board processor memory size and capacity for custom design solutions
• Operation with multiple protocols such as Philips Mifare® Ultralight, Innovision®-R&T
Jeweland ISO/IEC14443 type A tags ensures multi-platform compatibility and
seamless integration into legacy systems
• Software performs mapping between a common logical memory structure model
and physical memory maps of multiple tags types
• Also operates with Innovision R&T proprietary protocols and transparent reader
modes for even lower power consumption levels
• Powerful on board RISC processor is available to operate at higher levels of
application protocol stack than on conventional reader solutions for more
autonomous modes of operation
• Passive read/write RFID tag applications operating in the unlicensed 13.56 MHz
band
• Hand-held and low-power battery operated ISO/IEC 14443 type A read/writers
• Reader to reader inductive/Near Field Communications
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Block Diagram
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The host system, typically containing an application microprocessor, can control the
operation of the AT90RF135602 by interfacing commands and application data over a
bi-directional Serial Peripheral Interconnect (SPI) interface.
Figure 1. Typical System Architecture
Low Profile Ball Grid Array (LBGA)
SPI Micro
RF
Host
Controller
Reader
Passive
Regulator (2.8V)
Antenna
Coil
13.56 MHz Xtal
The partitioning of the system into its typical protocol layers is shown in Figure 2.
The exact boundary of each layer of the protocol stack is dependent on the specific
application and, therefore, the optimal architectural split of the protocol layers.
Software implementation of the protocol stack allows for operation with multiple parallel
stacks as well as greater flexibility for customisation and future updates.
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Figure 2. Overview of Typical Protocol Layers based on OSI 7-layerModel
Host Micro
Scan/Read/Write Commands, etc.
Reader Micro
Transmission Protocol
Intialisation & Anti-collision
Frame Format & Timing
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Application
Layer
Innovision R&T
JewelMifare®
Ultralight Protocol
ISO14443 part 3
ISO14443 part 3
Reader ASIC
Bit Representation & Timing
Modulation
ISO14443 part 2
ISO14443 part 2
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Pinout
Pin Description
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Figure 3. LBGA36 Package Pinout
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F EDCB A
PC4
SCK MISO MOSI
(SDO) (SDI)
/SS
XTAL2
VDDQ VCC2 VDD01 VDD02 GND1 XIN
PC6 VCC1
PC7
GND2 /Reset
(/MCLR)
XOUT
TX1
PD1
VDD
XTAL1
VSS PC5
Substrate Substrate VSS02 VSS01 VSSQ TX2
PDO PC3 PC2 RX PC1 PC0
1
2
3
4
5
6
7
8
Table 1. AT90RF15602 Pin Description
PIN Name
Pin Number
i/0/p Type
VDDQ
F2 Power
VDD
E6 Power
VDDO1 D2 Power
VDDO2 C2 Power
VCC1
E3 Power
VCC2
E2 Power
GND1
B2 Power
GND2
B3 Power
VSS
B6 Power
VSSQ
B7 Power
VSSO1 C7 Power
VSSO2 D7 Power
Description
Analogue Supply
Logic Supply
Output Stage Supply
Output Stage Supply
MCU Supply
MCU Supply
MCU GND
MCU GND
Logic GND
Analogue GND
Output Stage GND
Output Stage GND
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