ATA5551M-PP

ATA5551M-PP Datasheet


• Read/Write Anti-collision ID Transponder in Plastic Package<br>• Contactless Read/Write Data Transmission<br>• Inductive Coupled Power Supply at 125kHz<br>• Basic Component R/W e5551<br>• Anti-collision Mode by Password Request

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ATA5551M-PP ATA5551M-PP ATA5551M-PP (pdf)
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• Read/Write Anti-collision ID Transponder in Plastic Package
• Contactless Read/Write Data Transmission
• Inductive Coupled Power Supply at 125kHz
• Basic Component R/W e5551
• Anti-collision Mode by Password Request

E.g. 10 Transponders Read Out in < 500ms RF/32, Maxblock 2 Depending on the Application
• Built-in Coil and Capacitor for Circuit Antenna
• Starts with Cyclical Data Read Out
• 224-bit EEPROM User Programmable in 32-bit Blocks
• Typically < 50ms to Write and Verify a Block
• Write Protection by Lock Bits
• Malprogramming Protection
• Options Set by EEPROM

Bit Rate [bit/s] RF/8, RF/16, RF/32, RF/40, RF/50, RF/64, RF/100, RF/128 Modulation BIN, FSK, PSK, Manchester, Bi-phase

Application
• Access Control Systems
• Brand Protection
• Process Control and Automation Systems
• Installation and Medical Equipment
• Asset Management Systems
• Industrial

Standard Read/Write ID Transponder with Anti-collision

Atmel ATA5551

The Atmel ATA5551 is a completely programmable R/W transponder which implements all important functions for identification systems, including anti-collision e.g., 10 transponders in < 500ms depending on the application . It allows the contactless reading and writing of data which are transmitted bi-directionally between a read/write base station and the transponder. It is a plastic-packaged device which accommodates the IDIC e5551 and also the antenna realized as an LC-circuit. No additional external power supply is necessary for the transponder because it receives power from the RF field generated by the base station. Data are transmitted by modulating the amplitude of the RF field. The Atmel ATA5551 can be used to adjust and modify the ID code or any other stored data, e.g., rolling code systems. The on-chip 264-bit EEPROM 8 blocks, 33 bits per block can be read and written block wise from the base station. The blocks can be protected against overwriting. One block is reserved for setting the operation modes of the IC. Another block can obtain a password to prevent unauthorized writing.

Figure System Block Diagram

Reader Atmel U2270B read/write IC MARC4 series microcontroller

RF Field

Power Data

Atmel ATA5551 Transponder Atmel e5551 + coil + C in plastic package

C Atmel e5551

Coil

General

The transponder is the mobile part of the closed coupled identification system see Figure 1-1 , whereas the reader writer is based on the U2270B or on discrete solutions, and the read/write transponder is based on the Atmel IDIC e5551.

The transponder is a plastic cube device consisting of the following parts:
• The transponder antenna, realized as a tuned LC circuit
• Read/write Atmel IDIC e5551 with EEPROM

Transponder Antenna

The antenna consists of a coil and a capacitor for tuning the circuit to the nominal carrier frequency of 125kHz. The coil has a ferrite core for improving the distance of read, write and programming operations.

Read/Write IDIC e5551

The read/write Atmel IDIC e5551 is part of the transponder Atmel ATA5551. The data are transmitted bi-directionally between the base station and the transponder. The transponder receives power via a single coil from the RF signal generated by the base station. The single coil is connected to the chip and also serves as the IC’s bi-directional communication interface.

Data are transmitted by modulating the amplitude of the RF signal. Reading of register contents occurs by damping the coil by an internal load. Writing into registers occurs by interrupting the RF field in a specific way. The Atmel ATA5551 transponder operates at a nominal frequency of 125kHz. There are different bit rates and encoding schemes.

The on-chip 264-bit EEPROM 8 block, 33 bits each can be read and written block wise from the base station. The blocks can be protected against overwriting by using lock bits. One block is reserved for setting the operation modes of the IC. Another block contains a password to prevent unauthorized writing.

See Atmel e5551 datasheet for more detailed information of the IDIC.
2 Atmel ATA5551

Atmel ATA5551

Figure Block Diagram of the Atmel e5551 Chip

Coil1 Coil2

VDD VSS

Analog Frontend

Bitrate generator

Write decoder

Modulator

Mode register Controller Test logic

Memory 264-bit EEPROM

Input register HV generator

Test pads

Absolute Maximum Ratings
Ordering Information

Extended Type Number Package

ATA5551M-PP

Plastic package

Note See datasheet Atmel e5551

Remarks

All kinds of modulation RF/8, RF/16, RF/32, RF/40, RF/50,RF/64,RF/100 and RF/128 1 Default programmed Manchester Modulation, RF/32, MAXBLK = 2

Package Information

Dimensions in mm
10 Atmel ATA5551

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Datasheet ID: ATA5551M-PP 519173