KSEC Tagbase

Our RFID & NFC Knowledge Base

Version 1.3.1

Temic T5567 Proximity Card

Temic T5557 Proximity Card, Temic T5567 Proximity Card, Temic T5577 Proximity Card,

ATA5567 ISO Proximity Card, ATA5577 ISO Proximity Card.

IC manufacturer: Atmel
- Function: Read/Write protect by password
- Memory: 330-bit EEPROM(10 blocks, 33bits each)
- Frequency: 125KHz
- RF protocol: N/A
- Modulation: FSK, PSK, Manchester, Biphase, NRZ

• Contactless Power Supply
• Contactless Read/Write Data Transmission
• Radio Frequency fRF from 100 kHz to 150 kHz
• Basic Mode or Extended Mode
• Compatible with T5557, ATA5567
• Replacement for 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)
• 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
• Pad Options
– ATA5577M1
• 100 μm × 100 μm for Wire Bonding or Flip Chip
– ATA5577M2
• 200 μm × 400 μm for Direct Coil Bonding

ATA5577 Read/Write LF RFID IDIC 100 to 150 kHz (125 kHz)

• High Performance IDIC® (Extended Read/Write Distance)
• Contactless Power Supply
• Contactless Read/Write Data Transmission
• Radio Frequency fRF from 100 kHz to 150 kHz
• Basic Mode or Extended Mode
• Compatible with E5551/T5551, T5557, ATA5567
• Configurable for ISO/IEC 11784/785 Animal and Waste Standards Compatibility
• Total 363 Bits EEPROM Memory: 11 Blocks (32 Bits + 1 Lock Bit)
• On Chip Trimmed Capacitor
• High Q-antenna Tolerance Due to Build in Options
• Adaptable to Different Applications: Access Control, Animal ID and Waste

The ATA5577 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 ATA5577 is designed to be backwards compatible with the existing versions ATA5567/T5557 and TK5551 (most common modes).
It offers the customer an improved R/W performance and enables more flexibility for advanced applications by using the features of the Analog Front-End (AFE) option register.
In the initial state from production the AFE features of the ATA5577 are set to default values, making the ATA5577 performing similar to ATA5567, T5552 and TK5551.

Analog Front End (AFE)
The AFE includes all circuits which are directly connected to the coil terminals, generates the IC’s power supply, and handles the bi-directional data communication with the reader. It consists of the following blocks:
• Rectifier to generate a DC supply voltage from the AC coil voltage
• Clock extractor
• Switchable load between Coil 1 and Coil 2 for data transmission from the tag to the reader
• Field-gap detector for data transmission from the base station to the tag
• ESD-protection circuitry
Data-rate Generator
The data rate is binary programmable to operate at any data rate between RF/2 and RF/128 or to any of the fixed Basic mode data rates (RF/8, RF/16, RF/32, RF/40, RF/50, RF/64, RF/100 and RF/128).
Write Decoder
The write decoder detects the write gaps and verifies the validity of the data stream according to the Atmel e555x downlink protocol (pulse interval encoding).
HV Generator
This on-chip charge pump circuit generates the high voltage required to program the EEPROM.
DC Supply
Power is externally supplied to the IDIC via the two coil connections. The IC rectifies and regulates this RF source and uses it to generate its supply voltage.
Power-On Reset (POR)
The power-on reset circuit blocks the voltage supply to the IDIC until an acceptable voltage
threshold has been reached.
Clock Extraction
The clock extraction circuit uses the external RF signal as its internal clock source.
The control logic module executes the following functions:
• Load mode register with configuration data from EEPROM block 0 after power-on and during reading
• Load option register with the settings for the analog front end stored in EEPROM page 1 block 3 after power-on and during reading
• Control all EEPROM memory read/write access and data protection
• Handle the downlink command decoding, detecting protocol violations and error conditions

Mode Register
The mode register maintains a readable shadow copy of the configuration data held in block 0 of the EEPROM. It is continually refreshed during read mode and (re-)loaded after every POR event or reset command. On delivery, the mode register is pre-programmed with the value TBD.
The modulator encodes the serialized EEPROM data for transmission to a tag reader or base station. Several types of modulation are available such as: Manchester, bi-phase, FSK, PSK and NRZ.


The memory is a 363-bit EEPROM, which is arranged in 11 blocks of 33 bits each. Each block includes a single Lock bit which is responsible for write-protecting the associated block.Programming takes place on a block basis, so a complete block (including lock bit) can be programmed with a single command. The memory is subdivided into two page areas. Page 0 contains 8 blocks and page 1 contains 4 blocks. All 33 bits of a block, including the lock bit, are programmed simultaneously.

Block 0 of page 0 contains the mode/configuration data, which is not transmitted during regular-read operations. Addressing block 0 will always affect block 0 of page 0 independent of the page selector. Block 7 of page 0 may be used as a write-protection password. Block 3 of page 1 contains the option register, which is also not transmitted during regular-read operation. Bit 0 of every block is the lock bit for that block. Once locked, the block (including the lock bit itself) is not re-programmable via the RF field. Blocks 1 and 2 of page 1 contain traceability data and are transmitted with the modulation parameters defined in the configuration register after the opcode “11” is issued by the reader.

Using ATA5577 in Animal Identification Application according to ISO11784/85

The ATA5577 is the successor of the T5551, T5557 and ATA5567 with improved analog front-end circuitry and increased functionality. A basic mode is implemented being backward compatible in most common modes to existing T5551 (in most common modes), T5557 and ATA5567 applications. To achieve a high flexibility on assembly the chip is offered in various versions differing by package, by the internal chip capacitance and two types of pads: standard pads and mega pads for direct coil mounting.

This application note describes the antenna adaptation and programming of the ATA5577 to be compliant with ISO standard 11784/85 for animal ID and waste management applications.

Tag Programming to Achieve ISO 11784/85 Compliance
The standardization of animal identification via radio frequency (RFID) is described by the ISO standards 11784 and 11785.

ISO11785 specifies how a transponder is activated and how the stored information is transferred to a transceiver, while ISO11784 defines the structure and the information content of the codes stored in the transponder.

Requirements for Compliance with ISO11785
• Atmel® LF RFID systems must operate in FDX-B mode, modulating the magnetic field by ASK
• The transceiver carrier frequency and the resonant frequency of the transponder have to be adjusted to typically 134.2 kHz ±3 kHz.
• The data coding transferred by the transponder must be performed by differential biphase (DBP)
• The data bit rate is specified as RF/32

Table 2-1. ISO11784 Code Structure    
Information   Bit No. Description
11-bit header   1 to 11 Identification of telegram start
+ 8 trail bit
38 + 4 bit national code 12 to 53 Unique number within country, controlled by ICAR database
10 + 2 bit country code 54 to 65 Defined by ISO3166
1-bit flag 66 Identifies if additional data are appended
14 + 1 bit reserved 67 to 81 Reserved for future use
1 + 1 bit flag 82 to 83 Distinguish between animal and non-animal applications
16 bit + 2 bit CRC detection   84 to 100 Computed 16-bit CRC code using CRC-CCIT algorithm
24 bit + 3 bit extension   101 to 128 Data content, if indicated by flag (bit number 66)
Except the header, each field of the code has to be sent LSB first. Accordingly, the related bit
steam has to be written into the data blocks below with respect to the bit order. The 16-bit
CRC detection code is calculated solely over the 64-bit identification code by using the
CRC-CCIT algorithm.

 The ATA5577 transponder selection of the ATAK2270 RFID kit includes a special menu for programming and reading tags according ISO standard 11784/85.
The RFID tool is intended for generating low numbers of tag samples for test purposes. The menu allows entering of code structure, tag programming, tag reading and storing the data map to a specified folder.
Within the menu section the reader operates according to the standard with the field frequency
of 134.2 kHz.
Any transponder programmed compliant to ISO 11784/85 can be read. The read data are explicitly displayed by the parameter window.