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ACM1252U-Y3
– Reference Manual
Version 1.03
www.acs.com.hk
Page 19 of 92
www.acs.com
.hk
5.2. Contactless Smart Card Protocol
5.2.1.
ATR Generation
If the reader detects a PICC, an ATR will be sent to the PCSC driver to identify the PICC.
5.2.1.1.
ATR Format for ISO 14443 Part 3 PICCs
Byte
Value
Designation
Description
0
3Bh
Initial Header
1
8Nh
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
80h
TD1
Higher nibble 8 means: no TA2, TB2, TC2 only
TD2 is following.
Lower nibble 0 means T = 0
3
01h
TD2
Higher nibble 0 means no TA3, TB3, TC3, TD3
following.
Lower nibble 1 means T = 1
4
To
3+N
80h
T1
Category indicator byte, 80 means A status
indicator may be present in an optional
COMPACT-TLV data object
4Fh
Tk
Application identifier Presence Indicator
0Ch
Length
RID
Registered Application Provider Identifier (RID) #
A0 00 00 03 06
SS
Byte for standard
C0 .. C1h
Bytes for card name
00 00 00 00h
RFU
RFU # 00 00 00 00
4+N
UU
TCK
Exclusive-oring of all the bytes T0 to Tk
Example:
ATR for MIFARE Classic 1K = {3B 8F 80 01 80 4F 0C
A0 00 00 03 06
03
00 01 00 00 00 00 6Ah}
Where:
Length (YY)
= 0Ch
RID
= {A0 00 00 03 06h} (PC/SC Workgroup)
Standard (SS)
=
03h
(ISO 14443A, Part 3)
Card Name (C0 .. C1)
= {00 01h} (MIFARE Classic 1K)
Standard (SS)
= 03h: ISO 14443A, Part 3
= 11h: FeliCa