RFID - Transponder Protocol Specifications

[bigdogguru]

Please post your recommendations of Transponder Protocol Specification sites and docs concerning RFID Technologies.

Ever wonder what EM410x compatibility is referring to? Well they are transponder chips and this is the thread to learn the differences.

I'm always on the lookout for any online Transponder Protocol Specification resources.

One recommendation is the following site:


EM4100 Protocol Description

 

[bigdogguru]

EM4200 is a CMOS integrated circuit intended for use in electronic Read Only RF transponders. It is designed to replace seamlessly the EM Microelectronic-Marin Read Only ICs EM4100/4102 and EM4005/4105.

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[bigdogguru]

Newer series of EM4200 transponder chips compatibility with the older EM4100 series transponder chips.

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[bigdogguru]

EM Microelectronic is the father of RFID Transponder Chips and their associated protocols, hence the "EM" in EM410x:

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[bigdogguru]

The Atmel T5557 is a 330 bit Read/Write RFID transponder operating in the 125Khz band. Its memory I structured in 10 blocks of 33 bits, however only 224 bits are available for storage and retrieval of user defined data. This is structured as 7 blocks of 32 bits of read/write data. Among the many functions available the T5557 RFID transponder is capable of :

Selectable data rates RF/2 to RF/64

Selectable Modulation Encoding. Manchester, FSK, PSK, Biphase, NRZ.

Maximum block feature.

Password protected Read and Write

Direct access block read and write

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[bigdogguru]

Full datasheet for the T5557 RFID transponder:

The Atmel T5557 is a 330 bit Read/Write RFID transponder operating in the 125Khz band.

Atmel T5557 Datasheet

 

[bigdogguru]

A programmable R/W transponder tuned to 125kHz that implements all important functions for identification systems in the industrial and consumer segment. The device allows the contactless reading and writing of data transmitted bi-directionally between a read/write interrogator (reader) and the transponder. The device comes in a plastic package that accommodates the IDIC® e5551 and antenna realized as an LC-circuit. The device is a passive RFID device and no additional external power supply is necessary. Data is transmitted by modulating the amplitude of the RF field giving the ASK, FSK and PSK options. Codings schemes implemented are NRZ, Manchester and Bi-Phase. The on-chip 264-bit EEPROM (8 blocks, 33 bits per block) can be read and written by block from the intertogator station.


Atmel ATA5551 Standard Read/Write ID Transponder with Anti-collision

 

[bigdogguru]

Manufactured by EM Microelectronic, the EM4095 is a Read/Write analog front end for a 125kHz RFID base station. With only a few external components the EM4095 can generate the 125kHz resonant magnetic field required for reading and writing of magnetically coupled RFID Transponders.


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[bigdogguru]

The EM4100 (previously named H4100) is a CMOS integrated circuit for use in electronic Read Only RF Transponders. The circuit is powered by an external coil placed in an electromagnetic field, and gets its master clock from the same field via one of the coil terminals. By turning on and off the modulation current, the chip will send back the 64 bits of information contained in a factory pre-programmed memory array.


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[bigdogguru]

RFID transponders (Tags) are devices carrying digital information that can be read from a distance by a RFID transceiver (Reader). In order to be able to read the information stored on the RFID tags the reader must know how the information is stored and the protocol for extracting it. One of the more common data formats for RFID transponders is the EM4100 protocol, named so because the microchip at the heart of the Tag is based on the controller chip made by the company EM Microelectronic.



EM4100 Protocol description

 

[bigdogguru]

The IM283 is a fully-integrated 125 kHz RFID reader circuit. It is specially designed for being a space and cost efficient kernel IC of an RFID reading and writing base station. It covers the digital real time functions and the analogue signal processing necessary to access standard 64-bits transponders available on the market. IM283 is accessible by a standard micro – controller as an intelligent front - end peripheral device. A unique mutual tuning capability (RTA™) allows dynamic adaptation to every transponder read, particularly in poor reading conditions. IM283 is versatile enough to work in most low-power (short distance) and high power (longer distance) applications. IM283 is fully compatible with latest version of SW016 reader IC.


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[bigdogguru]

The EM4102 (previously named H4102) is a CMOS integrated circuit for use in electronic Read Only RF Transponders. The circuit is powered by an external coil placed in an electromagnetic field, and gets its master clock from the same field via one of the coil terminals. By turning on and off the modulation current, the chip will send back the 64 bits of information contained in a factor programmed memory array.


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