Reference Manual for the CLOUD 370x F Contactless Desktop Readers
Document Version 1.0
Last revised on 2014-07-22
Page 25 of 82
Examples of the ATR built for contactless storage tokens:
MIFARE Classic 4K
MIFARE Ultralight
5.3.3.2:
ATR for ISO/IEC 14443-4 User Tokens
The user credential exposes its ATS or application information, which is mapped to an ATR. The
following table describes the structure of this mapping.
Byte#
Value Designation
Description
0
0x3B Initial header
1
0x8n T0
n
indicates the number of historical bytes in the following ATR
2
0x80 TD1
upper nibble 8 indicates no TA2, TB2, TC2
lower nibble 0 means T=0
3
0x01 TD2
upper nibble 0 indicates no TA3, TB3, TC3
lower 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