SCM Microsystems @MAXX prime Uživatelský manuál stáhnout pdf (Strana 13)

@MAXX

LITE

EFERENCE

ANUAL

Smart Card insertion:

3.5.2. Internal RF antenna

The internal RF antenna is connected with the pins C4 / C8 of the smartcard reader for the

usage of dual interface cards.

When a dual interface card is inserted in the @MAXX and the @MAXX is put in the magnetic

field of any contactless reader, the internal RF antenna couples with the reader and an

induction current appears in the antenna thus providing power to the integrated circuit. The

generated current is proportional to the magnetic flux going through the antenna of @MAXX

reader

The carrier frequency of the magnetic field is used as a fundamental clock signal for the

communication between the reader and the card. It is also used as a fundamental clock input

for the integrated circuit microprocessor to function.

To send data to the user token the reader modulates the amplitude of the field. There are

several amplitude modulation and data encoding rules defined in ISO/IEC 14443. The reader

should should be ISO 14443 compliant reader.

To answer to the reader, the integrated circuit card of the @MAXX modulates its way of loading

(impedance) the field generated by the reader. Here also further details can be found in

ISO/IEC 14443.

The best communication between the @MAXX (with inserted dual interface card) and a

contactless reader can be established if the @MAXX is placed on the contactless reader with

the @MAXX bottom side in direction to the contactless reader. The bottom side of the @MAXX

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SCM Microsystems @MAXX prime Uživatelský manuál Strana 13