
SCL3711
R
EFERENCE
M
ANUAL
24
5.3.3.3. ATR for an NFC Forum tag type 1 user token (Topaz)
Byte#
Value
Designation
Description
0
0x3B
Initial header
1
0x82
T0
TD1 present. 2 historical bytes in following
ATR
2
0x80
TD1
Nibble8 indicates no TA2, TB2, TC2 and
TD2 present
Nibble 0 means T=0
3
0x01
TD2
Nibble8 indicates no TA3, TB3, TC3
Nibble 1 means T=1
4
0x02
Card Mode
NFC TAG operating at Passive 106 baud
rate
5
0x44
Card Type
Card type is Topaz
6
0xXX
TCK
XOR of all previous bytes
Example of the ATR built for a Topaz tag: