Data Sheet

Coupler - Reference manual
RM 6
Version 1.2
SELECT_CARD
Use
Select a card in order to get the serial number. This command manages anti-collision and
authentication features.
This command is able to test several communication protocol. It answers the number of
protocol used to select the card.
Prototyping
" Command sent : A4h
" Command type : ISO out
Host 80h A4h P1 P2 P3
Coupler A4h Card type Serial number 90h 00h
Parameters
Bit 76543210
Function - - Key Auth Presel. Loop Halt Wait
P1: Parameter used for contactless configuration
IMPORTANT: ‘ – ‘ are reserved for future use, and values should be set to 0.
WAIT :
1: Wait until a card is selected or a character received from the host (e.g. PC).
0: Exit if no card is detected after 3 attempts.
Note: When SELECT_CARD uses the option «LOOP», the coupler sends
ACK=60h (See T=0 specifications) after each unsuccessful selection until
a card is selected. When a card is selected, «90h 00h» is returned. In order
to stop this scanning, host has to send a byte through the RS232 interface.
HALT:
1: Halts card after selection for fast serial numbers capture.
0: No halt after selection.
LOOP:
1: returned a frame composed of ACK | CARD TYPE | SN | 9000h or wait character
60h
0: no loop performed.
PRE:
1: Increases pre-selection with INSIDE CONTACTLESS anti-collision and a large
number of cards.
0: Standard anti-collision (best for 5 cards max.).