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