Reference Manual
Prox–DU & Prox–SU
www.gemalto.com
DOC118569D
Public Use
Page 46/145
Interfacing with Contactless Cards
As defined in the PC/SC V2.0 specifications, the Prox–DU and the Prox–SU devices handle
all the ISO7816-4 Inter Industry commands to interface ISO14443 contactless smart cards.
The Prox–DU and the Prox–SU devices support both type ISO14443-A and ISO14443-B
cards.
In addition the Prox–DU and the Prox–SU devices will poll the field for the following smart
card events:
•
Insertion
•
Removal
Detecting an insertion
The contactless reader/writer periodically sends out commands to poll the RF field. If a
smart card comes within the range of the RF field, the contactless reader/writer detects the
card and activates it.
When the card is activated, its properties are recorded and an insertion event is generated.
The ISO14443 contactless smart card will be activated using the reader parameters stored
into the device’s configuration EEPROM.
ISO14443-A and ISO14443-B cards are polled with a default periodic rate of 100 ms.
Note: Multi-activation of contactless smart cards is not supported by the Prox–DU and the
Prox–SU devices. The first smart card detected in front of the reader/writer will be activated.
When a smart card insertion is detected, a CCID insertion notification message will be
generated and the blue LED of the contactless reader/writer will be set to an enlightened
steady state.
Detecting a removal
A smart card being removed from the field is detected by the contactless reader/writer.
The contactless reader/writer polls for an ISO14443-3 (MIFARE
®
) smart card by periodically
accessing the smart card during periods when there is no communication between the
reader/writer and the card.
The contactless reader/writer polls for an ISO14443-4 (T=CL) smart card by periodically
sending negative acknowledge frames to the smart card expecting, either a positive
acknowledge or the last I-block to be repeated (according to the ISO14443-4 standards).
When a smart card removal is detected, a CCID removal notification message will be
generated and the blue LED of the contactless reader/writer will blink slowly.
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