CHIPDRIVE CLOUD 4700F 905511 Hoja De Datos
Los códigos de productos
905511
CLOUD
47
X
0
F
R
EFERENCE
M
ANUAL
26
5.3.3.2. ATR for ISO/IEC 14443-4 user tokens
The credential exposes its ATS or application information which is mapped to an ATR. The
table describes how this mapping is done.
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
upper nibble 8 indicates no TA2, TB2, TC2
lower nibble 0 means T=0
lower nibble 0 means T=0
3
0x01
TD2
upper nibble 0 indicates no TA3, TB3, TC3
lower nibble 1 means T=1
lower nibble 1 means T=1
4...3+n
Historical
bytes or
application
information
bytes or
application
information
Type A: the historical bytes from the ATS (up to 15 bytes)
Type B (8 bytes):
Type B (8 bytes):
x
Byte 0 through 3: application data from ATQB,
x
Byte 4 through 6: protocol info byte from ATQB,
x
Byte 7: highest nibble is the MBLI (maximum buffer
length index) from ATTRIB, lowest nibble is 0x0
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 credential:
Type A
Type B