Short Form Specification
Prox–DU & Prox–SU
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DOC119224A Public Use Page 18/37
• Card baud rate:
o up to 500 kbps (TA1 = 97h for a clock frequency of 4 MHz)
• Card protocol:
o T=0 and T=1 protocols
• Card compliance:
o EMV and PC/SC modes. The interface is compliant with the EMV2000
version 4.0 specifications.
o ISO 7816-3 and -4 and ability to supply the cards with 5 V, 3 V, or 1.8 V
(Class A, B, or C cards respectively)
o IAS version 1.0 certified (Identification, Authentication & Signature)
LED interface
Two LEDs are available as visual indicators:
Figure 17 – Visual indicators
The indicators give information about the smart card interface as described in the next table:
Card Indicator Description
Off The card interface is deactivated
Slow Blink (0,2 s / 2 s) The card interface is ready
Blink (0,5 s / 1 s ) The card is present and inactive (powered off)
On The card is present and active (powered on)
Flashing The card communication is in progress
Note: When no SIM/SAM card is inserted into the Prox–SU, the yellow indicator will always
be off.
Contact card
yellow indicator
Contactless card
blue indicator