Rainbow Electronics MAX66040 - Manual (Page 13)

MAX66040
ISO/IEC 14443-3 Type B Initialization
and Anticollision Protocol
Before an ISO/IEC 14443-compliant RF device gives
access to its memory, a communication path between
the master and the RF device must be established.
Initially, the master has no information whether there are
any RF devices in the field of its antenna. To find out
whether there are one or more RF devices compliant to
a known standard in the field, the master uses a stan-
dard-specific initialization and anticollision protocol.
The ISO/IEC 14443 Type B protocol defines six states:
POWER-OFF, IDLE, WAITING FOR SLOT-MARKER,
READY, HALT, and ACTIVE. Figure 17 shows these
states and the conditions under which a slave transi-
tions between states. For most cases, letters surround-
ed by small circles reference the condition under which
a transition occurs. The conditions are explained in the
legend to Figure 17. Table 14 explains terms that are
used in the anticollision protocol and in the network
function command description.
ISO/IEC 14443 Type B-Compliant
Secure Memory
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ABRIDGED DATA SHEET