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Overview of RFID reader using STR710

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Figure 3.

CRX14 demonstration kit layout

ST has designed the CRX14, a short range contactless coupler chip, compliant with the

ISO14443 type B proximity standard. The CRX14 generates a 13.56 MHz signal. Designed

to deliver an RF power of 100 mW, it operates in the Short Range on contactless memory

tags (provided that they, too, are compliant with ISO14443 type B).

The CRX14 features the ST anti-collision mechanism, which allows the reader to detect and

identify all the tags that are present in the operating range, and to access them individually.

Because the CRX14 implements the France Telecom-proprietary anti-clone function, the

reader can also perform authentication of tags that are equipped with the France Telecom

anti-clone capability.

The CRX14 coupler interfaces between:

●

the memory tags, on one side, through input/output buffers and the ISO14443 type B

radio frequency protocol, and

●

Operating from a 5 V power supply, and delivered in a SO16N package, the CRX14 coupler

chip is an excellent solution for building contactless readers, embedded in the final

equipment, and offering a good compromise between operating range and cost.

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