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关键词: ATA5577C , Atmel , IDIC , RFID , 读写器
Atmel公司的 ATA5577C是100kHz-150kHz的无接触读/写 IDIC,单个线圈连接带芯片,用作IC的电源和双向通信接口,天线和芯片一起组成异频雷达收发机或标签。器件具有353位EEPROM存储器(7x32位EEPROM为用户存储器包括32位密码存储器,2x32位用作ID,1x32位为选择用寄存器),和ISO/IEC 11784/785兼容,主要用在下一代接入控制如宾馆客房,工程部门,办公室,停车场,时间记录系统,会员卡等。本文介绍了ATA5577C主要特性,方框图以及RFID系统框图,基于AVR的125kHz RFID评估套件主要特性以及系统框图。
2011-10-10 11:11:26 上传
Read/Write LF RFID IDIC 100 to 150kHz
The Atmel® ATA5577C is a contactless read/write IDentification IC (IDIC®) for applications in the 125kHz or 134kHz frequency band. A single coil connected to the chip serves as the IC’s power supply and bi-directional communication interface. The antenna and chip together form a transponder or tag.
The on-chip 363-bit EEPROM (11 blocks with 33 bits each) can be read and written block-wise from a base station (reader).
Data is transmitted from the IDIC (uplink) using load modulation. This is achieved by damping the RF field with a resistive load between the two terminals, coil 1 and coil 2. The IC receives and decodes serial base station commands (downlink), which are encoded as 100% amplitude modulated (OOK) pulse-interval-encoded bit streams.
The Atmel ATA5577C is designed to be compatible with the Atmel T5557/ATA5567. The structure of the configuration register is identical. The two modes, basic mode and extended mode, are also available. The Atmel ATA5577C is able to replace the Atmel e5551/T5551 in most common operation modes. In all applications, the correct functionality of the replacements must be evaluated and proved.
ATA5577C主要特性:
• Contactless Power Supply
• Contactless Read/Write Data Transmission
• Radio Frequency fRF from 100kHz to 150kHz
• Basic Mode or Extended Mode
• Compatible with Atmel T5557, ATA5567
• Replacement for Atmel e5551/T5551 in Most Common Operation Modes
• Configurable for ISO/IEC 11784/785 Compatibility
• Total 363 Bits EEPROM Memory: 11 Blocks (32 Bits + 1 Lock Bit)
– 7x32 Bits EEPROM User Memory, Including 32-bit Password Memory
– 2x32 Bits for Unique ID
– 1x32-bit Option Register in EEPROM to Set Up the Analog Front End:
• Clock and Gap Detection Level
• Improved Downlink Timing
• Clamp and Modulation Voltage
• Soft Modulation Switching
• Write Damping like the Atmel T5557/ATA5567 or with Resistor
• Downlink Protocol
– 1x32-bit Configuration Register in EEPROM to Set Up:
• Data Rate:
– RF/2 to RF/128, Binary Selectable or
– Fixed Basic Mode Rates
• Modulation/Coding:
– Bi-phase, Manchester, FSK, PSK, NRZ
• Other Options:
– Password Mode
– Max Block Feature
– Direct Access Mode
– Sequence Terminator(s)
– Blockwise Write Protection (Lock Bit)
– Answer-On-Request (AOR) Mode
– Inverse Data Output
– Disable Test Mode Access
– Fast Downlink (~6Kbits/s versus ~3Kbits/s)
– OTP Functionality
– Init Delay (~67ms)
• High Q-antenna Tolerance Due to Build in Options
• Adaptable to Different Applications: Access Control, Animal ID and Waste
Management
• On-chip Trimmed Antenna Capacitor:
– 250pF/330pF (±3%)
– 75pF/130pF (On Request)
– Without On-chip Capacitor (On Request)
• Pad Options
– Atmel ATA5577M1C
• 100μmx100μm for Wire Bonding or Flip Chip
– Atmel ATA5577M2C
• 200μmx400μm for Direct Coil Bonding
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