ACS ACR128, User Manual

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ACR128 Dual Interface Smart Card Reader
5.0 PICC Interface Description
5.1 ATR Generation
If the reader detects a PICC, an ATR will be sent to the PCSC driver for identifying the PICC.
5.1.1 ATR format for ISO 14443 Part 3 PICCs.
Table 7: ISO 14443 Part 3 ATR Format
Byte Value
(Hex)
Designation Description
0 3B Initial Header
1 8N T0
Higher nibble 8 means there are no TA1, TB1 and
TC1. Only TD1 follows.
Lower nibble N is the number of historical bytes
(HistByte 0 to HistByte N-1)
2 80 TD1
Higher nibble 8 means there are no TA2, TB2 and
TC2. Only TD2 follows.
Lower nibble 0 means T = 0
3 01 TD2
Higher nibble 0 means no TA3, TB3, TC3 and TD3
follow.
Lower nibble 1 means T = 1
80 T1
Category indicator byte 80 means a status indicator
may be present in an optional COMPACT-TLV data
object
4F Application identifier Presence Indicator
0C Length
RID
Registered Application Provider Identifier (RID) #
A0 00 00 03 06
SS Byte for standard
C0 C1
Tk
Bytes for card name
4
To
3+N
00 00 00 00 RFU RFU # 00 00 00 00
4+N UU TCK Exclusive-ORing of all the bytes T0 to Tk
Example:
ATR for MiFare 1K = [3B 8F 80 01 80 4F 0C A0 00 00 03 06 03 00 01 00 00 00 00 6A]
ATR
Initial
Header T0 TD1 TD2 T1 Tk Length RID Standard Card
Name
RFU TCK
3B 8F 80 01 80 4F 0C A0 00 00
03 06
03 00 01 00 00 00
00 6A
Where:
Length (YY) = 0C
RID = A0 00 00 03 06 (PC/SC Workgroup)
Standard (SS) = 03 (ISO14443A, Part 3)
Card Name (C0 ... C1) = [00 01] (MIFare 1K)
[00 02] (Mifare 4K)
[00 03] (Mifare Ultralight)
FF [SAK] (Undefined)
[FF 0] (Mifare Mini)
Page 12 of 36
ACR128 API
Version 1.7 May 2008