Data Sheet

Chips and readers- USER’S GUIDE
UG 9
Version 1.0
HOW TO WORK WITH SEVERAL CHIPS IN THE FIELD
Here is the basic algorithm to get serial numbers of all chips in a given RF field :
Store chip serial
number in a table
Halt the selected chip
Select the chip you
want to work with
Select card
No card selected
Chips inventory
Make a loop with the SELECT_CARD COMMAND with HALT option enable (P1 = 02h).
Chip selection with its serial number
Use the following command to select a given chip thanks to its serial number. The chip
will answer you its serial number.
!!
!!
! ActiveX method : Mx.ReSelect (ChipSN)
!!
!!
! C Library : Clib_w_ReSelect (ChipSN)
!!
!!
! Low level : TRANSMIT command + 81h chip command
Host
80hC2hC5h08h09h
81h & Serial
Number
Coupler
C2h
Serial
number
90h 00h
Replace C5h by C4h (C6) to use 14 443 type B-2 (type B-3) protocol.
TIPS : The low level
command
SELECT_CARD
includes an option that
halts the chip as soon
as it is selected. This
enables to earn time
by avoiding to send the
HALT command. Just
use the following P1
parameters : P1 =
02h.