User's Manual

ACR122L
-
USB
-
ACS
Card Name (C0 .. C1)
00 01: Mifare 1K
00 02: Mifare 4K
00 03: Mifare Ultralight
00 26: Mifare Mini
F0 04: Topaz and Jewel
F0 11: FeliCa 212K
F0 12: FeliCa 424K
FF [SAK]: undefined tags
1.2 ATR format for ISO 14443 Part 4 PICCs.
Byte Value
(Hex)
Designation Description
0 3B Initial Header
1 8N T0 Higher nibble 8 means: no TA1, TB1, TC1 only
TD1 is following.
Lower nibble N is the number of historical bytes
(HistByte 0 to HistByte N-1)
2 80 TD1 Higher nibble 8 means: no TA2, TB2, TC2 only
TD2 is following.
Lower nibble 0 means T = 0
3 01 TD2 Higher nibble 0 means no TA3, TB3, TC3, TD3
following.
Lower nibble 1 means T = 1
XX T1 4
to
3 + N
XX
XX
XX
Tk
Historical Bytes:
ISO14443A:
The historical bytes from ATS response. Refer to
the ISO14443-4 specification.
ISO14443B:
The higher layer response from the ATTRIB
response (ATQB). Refer to the ISO14443-3
specification.
4+N UU TCK Exclusive-oring of all the bytes T0 to Tk
E.g 1. ATR for DESFire = { 3B 81 80 01 80 80 } // 6 bytes of ATR