ITWissen.info - Tech know how online

ISO 14443

TheISO/IEC 14443 standard specifies the physical and data properties of the transmission path between the reader and a contactless smart card. This contactless smart card is concerned with short ranges of up to 10 cm. These smart cards are mainly used in payment systems and for the purchase of tickets, the ticketing.

The ISO-14443 specifications are divided into four parts:

Part 1: Physical Characteristics. Dimensions according to ISO 7810. This part specifies the physical characteristics of the proximity integrated circuit card( PICC), including its dimensions. In addition to the classic size of ID1 cards, smaller plastic cards for smartphones and car keys are also specified.

The different contactless smart cards

The different contactless smart cards

Part 2: Radio Frequency Power and Signal Interface. Part 2 of ISO 14443 specifies the radio frequency of 13.56 MHz and the modulation methods for types "A" and "B". Both types use amplitude shift keying( ASK) in the downlink from the card reader to the PICC card, in the uplink the A type also uses amplitude shift keying (ASK) and Manchester coding, whereas the B type uses two- phase shift keying(BPSK) and NRZ coding. Part 2 deals with the coupling between the Proximity Coupling Device( PCD) and the PICC card, power transmission and bidirectional communication between the above components.

Part 3: Initialization and Anticollision. The third part describes the frame structure and the communication during data exchange between the Proximity Coupling Device (PCD) and PICC card. In addition, Part 3 describes methods for distinguishing between multiple cards that are in the near field at the same time, the so-called anticollision.

Part 4: Transmission Protocols. Part 4 addresses the transmission protocol for contactless data exchange.

The readers for contactless smart cards must be able to read both versions: Type "A" and Type "B".

Informations:
Englisch: ISO 14443
Updated at: 13.06.2012
#Words: 276
Links: international electrotechnical commission (IEC), standard (STD), data, transmission, path
Translations: DE
Sharing:    

All rights reserved DATACOM Buchverlag GmbH © 2024