User's Manual

SCL010/01X REFERENCE MANUAL 25
5.3.3.5. ATR for ISO/IEC 14443-4 user tokens
The user token exposes its ATS or application information which is mapped to an ATR. The table
describes how this mapping is done.
Byte# Value Designation Description
0 0x3B Initial header
1 0x8n T0 n indicates the number of historical bytes in following ATR
2 0x80 TD1 Nibble8 indicates no TA2, TB2, TC2
Nibble 0 means T=0
3 0x01 TD2 Nibble8 indicates no TA3, TB3, TC3
Nibble 1 means T=1
4...3+n Historical
bytes or
application
information
Type A: the historical bytes from the ATS (up to 15 bytes)
Type B (8 bytes):
 Byte 0 through 3: application data from ATQB,
 Byte 4 through 6: protocol info byte from ATQB,
 Byte 7: highest nibble is the MBLI (maximum
buffer length index) from ATTRIB, lowest nibble
is 0x0
4+n TCK XOR of all previous bytes
Example of the ATR built for an ISO14443-4 user tokens:
Type A Type B