Document Version 1.00
Last revised on
Page 28 of 87
2020-04-10
Reference Manual for uTrust 3720F and uTrust 3721F Readers
5.3.3.4.
ATR for LF tokens
The credential 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
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
0x80
A status indicator may be present in an optional
TLV data object
0x4F
Optional TLV
data object
Tag: Application identifier
Length
1 byte
RID (0xA000000306)
Registered identifier on 5 bytes
PIX (0x40 0xXX 0xXX)
Proprietary identifier extension on 3 bytes
0x00 0x000x000x00
4 RFU bytes
4+n
TCK
XOR of all previous bytes