Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
Features
A of a family of devices with user memory of 4 kilobits to 64 kilobits
Contactless 13.56MHz RF communications interface
ISO/IEC 14443-2:2001 Type B Compliant
ISO/IEC 14443-3:2001 Type B Compliant Anticollision Protocol
Tolerant of Type A Signaling for multi-protocol applications
Integrated 82pF tuning capacitor
User EEPROM memory configurations:
64 kilobits configured as sixteen 512 byte (4-Kbit) User Zones [AT88SC6416CRF]
32 kilobits configured as sixteen 256 byte (2-Kbit) User Zones [AT88SC3216CRF]
16 kilobits configured as sixteen 128 byte (1-Kbit) User Zones [AT88SC1616CRF]
8 kilobits configured as eight 128 byte (1-Kbit) User Zones [AT88SC0808CRF]
4 kilobits configured as four 128 byte (1-Kbit) User Zones [AT88RF04C]
Byte, page, and partial page write modes
Self timed write cycle
256 byte (2-Kbit) configuration memory
User Programmable Application Family Identifier (AFI)
User-defined anticollision polling response
User-defined keys and passwords
Read-only unique die serial number
High security features
Selectable access rights by zone
64-bit Mutual Authentication Protocol (under license of ELVA)
Encrypted checksum
Stream encryption using 64-bit key
Four key sets for authentication and encryption
Four or eight 24-bit password sets
Password and authentication attempts counters
Anti-tearing function
Tamper sensors
High reliability
Endurance: 100,000 write cycles
Data retention: 10 years
AT88RF04C, AT88SC0808CRF, AT88SC1616CRF
AT88SC3216CRF, AT88SC6416CRF
CryptoRF EEPROM Memory Full Specification
DATASHEET
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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Table of Contents
1. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. User Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4. Configuration Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5. Command Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6. Anticollision Command Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1 REQB/WUPB Polling Commands [$05] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2 Slot MARKER Command [$s5] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.3 ATTRIB Command [$1D] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.4 HLTB Command [$50] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7. Active State Command Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.1 Response Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2 Set User Zone Command [$c1]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.3 Read User Zone Command [$c2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4 Read User Zone (Large Memory) Command [$c2]. . . . . . . . . . . . . . . . . . . . . 27
7.5 Read User Zone Command with Integrated MAC [$c2] [88RF] . . . . . . . . . . . 29
7.6 Write User Zone Command [$c3] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.7 Write User Zone (Large Memory) Command [$c3] . . . . . . . . . . . . . . . . . . . . . 35
7.8 Write User Zone Command with Integrated MAC [$c3] [88RF] . . . . . . . . . . . 38
7.9 Write System Zone Command [$c4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.10 Write System Zone Command with Integrated MAC [$c4] [88RF] . . . . . . . . . 44
7.11 Write System Zone Command, Write Fuse Byte Option [$c4] . . . . . . . . . . . . 47
7.12 Read System Zone Command [$c6] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.13 Read System Zone Command, Read Fuse Byte Option [$c6] . . . . . . . . . . . . 53
7.14 Read System Zone Command, Read Checksum Option [$c6]. . . . . . . . . . . . 56
7.15 Verify Crypto Command [$c8] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.16 Send Checksum Command [$c9] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
7.17 DESELECT Command [$cA] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.18 IDLE Command [$cB] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.19 Check Password Command [$cC] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8. Transaction Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
10. Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
11. Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11.1 Tamper Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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Appendix A. Terms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Appendix B. Standards and Reference Documents . . . . . . . . . . . . . . . . . . . . 75
B.1 International Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
B.2 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Appendix C. User Memory Maps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Appendix D. Configuration Memory Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Appendix E. Device Personalization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
E.1 User Memory Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
E.2 Polling Response and OTP Memory Personalization . . . . . . . . . . . . . . . . . . 87
E.3 Transport Password Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
E.4 Security Fuse Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
E.5 Secure Personalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Appendix F. Secure Personalization [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
F.1 User Memory Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
F.2 Transport Password Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
F.3 Security Fuse Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
F.4 Secure Personalization Mode Data Encryption . . . . . . . . . . . . . . . . . . . . . . . 91
Appendix G. Security Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
G.1 Reading the Security Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
G.2 Programming the Fuse Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
G.3 Configuration Memory Access Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Appendix H. Configuration of Password and Access Control Registers . 96
H.1 User Zone Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
H.2 Access Registers (AR) [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
H.3 Device Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Appendix I. Using Password Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
I.1 Communication Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
I.2 Transport Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
I.3 The Password and PAC Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
I.4 Password Security Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
I.5 Password Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
I.6 Changing Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
I.7 Supervisor Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Appendix J. Using Authentication Communication Security. . . . . . . . . . . . 108
J.1 Communication Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
J.2 Authentication Security Options [88SC] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
J.3 Authentication Security Options [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
J.4 The Password Register [88SC] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
J.5 The Key Register [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
J.6 Key Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
J.7 AAC Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
J.8 Authentication Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
J.9 Set User Zone and Checksums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
J.10 Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
J.11 Deactivating Authentication Communication Security . . . . . . . . . . . . . . . . . 116
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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Appendix K. Using Encryption Communication Security . . . . . . . . . . . . . . . 117
K.1 Communication Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
K.2 Encryption Security Options [88SC] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
K.3 Encryption Security Options [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
K.4 The Password Register [88SC] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
K.5 The Key Register [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
K.6 Key Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
K.7 AAC Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
K.8 Encryption Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
K.9 Set User Zone and Checksums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
K.10 Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
K.11 Deactivating Encryption Communication Security . . . . . . . . . . . . . . . . . . . . 126
Appendix L. Understanding Anti-Tearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
L.1 Tearing Explained . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
L.2 CryptoRF Anti-Tearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
L.3 Performance Impact of Anti-Tearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
L.4 Reliability Impact of Anti-Tearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
L.5 Activating Anti-Tearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Appendix M. Personalization of the Anticollision Registers . . . . . . . . . . . . 131
M.1 Anticollision Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
M.2 Anticollision Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
M.3 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Appendix N. Understanding Anticollision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Appendix O. The ISO/IEC 14443 Type B RF Signal Interface . . . . . . . . . 138
O.1 RF Signal Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
O.2 Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
O.3 Frame Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
O.4 Reader Data Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
O.5 Card Data Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
O.6 Response Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
O.7 CRC Error Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
O.8 Type A Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Appendix P. RF Specifications and Characteristics . . . . . . . . . . . . . . . . . . . 142
P.1 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
P.2 Reader Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
P.3 PICC Antenna Size Dependent Specifications . . . . . . . . . . . . . . . . . . . . . . 143
P.4 Specifications for Other Antenna Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
P.5 Modulation Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
P.6 What is an ID-1 PICC Antenna? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
P.7 Other Characteristics Impacting Performance . . . . . . . . . . . . . . . . . . . . . . . 145
Appendix Q. Transaction Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Q.1 Command Response Times [88SC] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Q.2 Command Response Times [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Q.3 Transaction Times [88SC] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Q.4 Transaction Times [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix R. 88RF PICC Backward Compatibility . . . . . . . . . . . . . . . . . . . . . 150
R.1 Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
R.2 Security Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
R.3 Attempt Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
R.4 Checksums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
R.5 Personalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Appendix S. Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
S.1 CryptoRF with 4Kb of User Memory Configured as
4 Zones of 128 bytes Each . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
S.2 CryptoRF with 8Kb of User Memory Configured as
8 Zones of 128 bytes Each . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
S.3 CryptoRF with 16Kb of User Memory Configured as
16 Zones of 128 bytes Each . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
S.4 CryptoRF with 32Kb of User Memory Configured as
16 Zones of 256 bytes Each . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
S.5 CryptoRF with 64Kb of User Memory Configured as
16 Zones of 512 bytes Each . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
S.6 Package Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
S.7 Packaging Information — Mechanical Drawings . . . . . . . . . . . . . . . . . . . . . 154
Appendix T. Errata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
T.1 Lot History Code Register Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
T.2 Read User Zone command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
T.3 Read User Zone command PARAM Codes [88RF] . . . . . . . . . . . . . . . . . . . 157
T.4 Status Codes [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
T.5 Encryption Activation Change [88RF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Appendix U. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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1. Description
The Atmel® CryptoRF® family integrates a 13.56MHz RF interface with Atmel CryptoMemory® security features. This
product line is ideal for RF tags and contactless smart cards that can benefit from advanced security and cryptographic
features. The device is optimized as a contactless secure memory for secure data storage without the requirement of an
internal microprocessor.
For communications, the RF interface utilizes the ISO/IEC 14443-2 and -3 Type B bit timing and signal modulation
schemes, and the ISO/IEC 14443-3 Slot-MARKER Anticollision Protocol. Data is exchanged half duplex at a 106-kbit per
second rate, with a two byte CRC_B providing error detection capability. The RF interface powers the other circuits, no
battery is required. Full compliance with the ISO/IEC 14443 -2 and 14443 -3 standards provides both a proven RF
communication interface and a robust anticollision protocol.
The five products in the CryptoRF family contain 4 to 64 kilobits of user memory plus two kilobits of configuration
memory. The two kilobits of configuration memory contains:
Read/Write password sets
Four crypto key sets
Security access registers for each user zone
Password/Key registers for each zone
The CryptoRF command set is optimized for a multi-card RF communications environment. A programmable AFI register
allows this IC to be used in numerous applications in the same geographic area with seamless discrimination of cards
assigned to a particular application during the anticollision process.
Figure 1-1. Block Diagram
EEPROM
Command
and
Response
Data Transfer
Authentication
Encryption
and
Certification
Unit
Frame
Formatting
and
Error
Detection
Interface
Password
Verification
Anticollision
Random Number
Generator
RF Interface
AC1
AC2
Over
Voltage
Clamp
Modulator
Regulator
Rectifier
VSS
Clock
Extraction
Data
Extraction
CVDD
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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2. Introduction
The CryptoRF family consists of devices in the AT88SCxxCRF and AT88RFxxC catalog number series. The first
generation devices are assigned catalog numbers in the AT88SCxxCRF series. The second generation devices are
assigned catalog numbers in the AT88RFxxC series. Several security options have been added to the second generation
devices to enhance system security.
2.1 Communications
All personalization and communication with this device is performed through the RF interface. The IC includes an
integrated tuning capacitor, enabling it to operate with only the addition of a single external coil antenna.
The RF communications interface is fully compliant with the electrical signaling and RF power specifications in ISO/IEC
14443-2 for Type B only. Anticollision operation and frame formatting are compliant with ISO/IEC 14443-3 for Type B
only.
2.2 Scope
This CryptoRF Specification document includes all specifications for the Normal, Authentication, and Encryption modes
of CryptoRF operation.
2.3 Conventions
ISO/IEC 14443 nomenclature is used in this specification where applicable. The following abbreviations are utilized
throughout this document. Additional terms are defined in Appendix A “Terms and Abbreviations” on page 70.
Table 2-1. Terms
This document contains the specifications for AT88SCxxCRF and AT88RFxxC CryptoRF devices. Any specification that
applies only to the first generation AT88SCxxCRF devices references: 88SC devices, 88SC PICCs, or contain [88SC] in
the section title. Any specification that applies only to the second generation AT88RFxxC devices references: 88RF
devices, 88RF PICCs, or contain [88RF] in the section title. Specifications that apply to all devices are referred to as
CryptoRF specifications.
Each command/response exchange between the PCD and PICC is formatted as shown in Figure 2-1. The bytes are
shown in the order in which they are transmitted, with PCD transmissions in the left column, and PICC transmissions in
the right column.
Abbrev. Term Definition
PCD Proximity Coupling Device The reader/writer and antenna.
PICC Proximity Integrated Circuit Card The tag/card containing the IC and antenna.
RFU Reserved for Future Use Any feature, memory location, or bit that is held as reserved for future use.
$ xx Hexadecimal Number Denotes a hex number “xx” (Most Significant Bit on left).
xxxxb Binary Number Denotes a binary number “xxxx” (Most Significant Bit on left).
88SC CryptoRF devices in the AT88SCxxCRF catalog number series.
88RF CryptoRF devices in the AT88RFxxC catalog number series.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Each byte contains one or more fields as indicated by lines drawn vertically within the byte. The field in the left half of the
byte is the upper nibble of the byte, and the field to the right is the lower nibble of the byte. In Figure 2-1, five fields
contain values ($1D, $00, $F, $51, $0), four fields contain field names (Addr, XX, CID, Data), and four fields contain error
detection codes (CRC1, CRC2).
Figure 2-1. Example Command and Response Format
The CRC error detection codes are calculated using all of the previous bytes in the command or response and are
appended to each command and response to allow detection of RF communication errors. These bytes are required by
ISO/IEC 14443-3:2001 and are usually calculated and verified in the reader hardware.
Reader PICC
Command First Byte > $1D
Command Second Byte > $00
Command Third Byte > ADDR
Command Fourth Byte > $F XX
Command Fifth Byte > $51
CRC First Byte > CRC1
CRC Second Byte > CRC2
TR2
Response First Byte > $0 CID
Response Second Byte > DATA
CRC First Byte > CRC1
CRC Second Byte > CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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3. User Memory
The User EEPROM Memory characteristics are summarized in User Memory is divided into equally sized user zones.
Access to the user zones is allowed only after security requirements have been met. These security requirements are
defined by the user in the configuration memory during personalization of the device. The default configuration is open
read/write access to all user memory zones. See Appendix C “User Memory Maps” on page 76.
Table 3-1. CryptoRF User Memory Characteristics
CryptoRF
Part Number
User Memory Size User Memory Organization Write Characteristics
Bits Bytes # of Zones Bytes/Zones Standard Write Anti-Tearing Write
AT88RF04C 4K 512K 4 128 1 to 16 bytes 1 to 8 bytes
AT88SC0808CRF 8K 1K 8 128 1 to 16 bytes 1 to 8 bytes
AT88SC1616CRF 16K 2K 16 128 1 to 16 bytes 1 to 8 bytes
AT88SC3216CRF 32K 4K 16 256 1 to 32 bytes 1 to 8 bytes
AT88SC6416CRF 64K 8K 16 512 1 to 32 bytes 1 to 8 bytes
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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4. Configuration Memory
The configuration memory consists of 2048 bits of EEPROM memory used for storing system data, passwords, keys,
codes, and access control registers for each user zone. Access rights to the configuration memory are defined in the
control logic and cannot be altered by the user. These access rights include the ability to program certain portions of the
configuration memory and then lock the data written through use of the security fuses. The Read System Zone and Write
System Zone commands are used to access the configuration memory. See Appendix D “Configuration Memory Maps”
on page 82.
Table 4-1. Configuration Memory Characteristics
CryptoRF
Part Number Password Sets Key Sets
OTP Memory Transport Password
Free For Customer Use PW Index Password
AT88RF04C 4 4 25 bytes $07 $30 1D D2
AT88SC0808CRF 8 4 27 bytes $07 $40 7F AB
AT88SC1616CRF 8 4 27 bytes $07 $50 44 72
AT88SC3216CRF 8 4 27 bytes $07 $60 78 AF
AT88SC6416CRF 8 4 27 bytes $07 $70 BA 2E
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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5. Command Set
The CryptoRF command set contains two types of commands:
Anticollision Commands — Explicitly defined in ISO/IEC 14443-3:2001.
Active State Commands — Atmel defined commands that are compliant with the ISO/IEC 14443-3:2001
requirements. These contain the CID code that is assigned to a card when it is selected during the anticollision
process. See the ATTRIB command for coding of the CID bits.
Table 5-1. Coding of the Command Byte for the Anticollision Command Set
Table 5-2. Coding of the Command Byte for the CryptoRF Active State Command Set.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Command Name Hexadecimal
0 0 0 0 0 1 0 1 REQB/WUPB $05
Slot Number 0 1 0 1 Slot MARKER $s5
00011101ATTRIB $1D
01010000HLTB $50
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Command Name Hexadecimal
CID 0 0 0 1 Set User Zone $c1
CID 0 0 1 0 Read User Zone $c2
CID 0 0 1 1 Write User Zone $c3
CID 0 1 0 0 Write System Zone $c4
CID 0 1 1 0 Read System Zone $c6
CID 1 0 0 0 Verify Crypto $c8
CID 1 0 0 1 Send Checksum $c9
CID 1 0 1 0 DESELECT $cA
CID 1 0 1 1 IDLE $cB
CID 1 1 0 0 Check Password $cC
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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6. Anticollision Command Definitions
Commands in this section are arranged in order by the hexadecimal code in the command byte.
6.1 REQB/WUPB Polling Commands [$05]
The REQB/WUPB command is used to search for PICCs in the RF field. The command and response are ISO/IEC
14443-3:2001 compliant.
6.1.1 Operation
The “Request B” (REQB) and “Wake-Up B” (WUPB) commands are used to probe the RF field for Type B PICCs as the
first step in the anticollision process. The response to an REQB or WUPB command is the “Answer to Request B”
(ATQB). PICCs in the Active State are not permitted to answer this command.
Reader PICC
Command > $05
AFI
PARAM
CRC1
CRC2
ATQB Response > $50 SUCCESS RESPONSE
PUPI 0 System Zone Byte $00
PUPI 1 System Zone Byte $01
PUPI 2 System Zone Byte $02
PUPI 3 System Zone Byte $03
APP 0 System Zone Byte $04
APP1 System Zone Byte $05
APP 2 System Zone Byte $06
APP 3 System Zone Byte $07
Protocol 1 $00
Protocol 2 System Zone Byte $08
Protocol 3 $51
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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6.1.2 Command Field Descriptions
AFI: The Application Family Identifier (AFI) is used to select the family and sub-family of cards which the PCD is
targeting. Only PICCs with a matching AFI code are permitted to answer an REQB or WUPB command.
Table 6-1 describes the AFI matching criteria. An AFI of $00 activates all Type B PICCs.
Table 6-1. AFI Matching Criteria for Polling Commands Received by the PICC.
Notes: 1. “Y” = $1 to $F
2. “X” = $1 to $F
PARAM: The PARAM byte is used to send two parameters to the PICC. The parameter “N”, which assigns the
number of anticollision slots, and the REQB/WUPB selection bit.
Figure 6-1. Definition of the PARAM Byte in the REQB/WUPB Command.
Table 6-2. Coding of “N”, the Number of Anticollision Slots, in the PARAM Byte.
Table 6-3. Coding of the REQB/WUPB Selection Bit in the PARAM Byte.
CRC: Communication error detection bytes.
AFI
High Bits
AFI
Low Bits
REQB/WUPB Polling produces a
PICC response from:
$0 $0 All Families and sub-families.
“X” $0 All sub-families of Family “X”.
“X” “Y” Only sub-family “Y” of Family “X”.
$0 “Y” Proprietary sub-family “Y” Only.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 0 RW N
Bit 2 Bit 1 Bit 0 N
0 0 0 1
0 0 1 2
0 1 0 4
0 1 1 8
1 0 0 16
1 0 1 RFU
1 1 0 RFU
1 1 1 RFU
Bit 3 Command
0 REQB
1 WUPB
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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6.1.3 Response Field Descriptions
PUPI: PseudoUnique PICC Identifier. This is the card ID used for anticollision, stored in the System Zone.
APP: Application Data. Information about the card or application, stored in the System Zone.
The fourth byte of the application data field, APP3, is programmed by Atmel with a memory density code at the factory to
permit easy identification of different card sizes. The memory density codes programmed by Atmel are shown in
Table 6-4.
Table 6-4. Default Value of APP3 is the CryptoRF Memory Density Code
Protocol: ISO/IEC 14443 communication capabilities reported to the PCD.
CRC: Communication error detection bytes.
6.1.4 Error Handling
If an REQB or WUPB command containing errors is received by the PICC, it is ignored and no response is sent.
6.1.5 Notes
The REQB and WUPB commands are identical for 88SC and 88RF CryptoRF PICCs.
Device Number Density Code
AT88RF04C $22
AT88SC0808CRF $33
AT88SC1616CRF $44
AT88SC3216CRF $54
AT88SC6416CRF $64
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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6.2 Slot MARKER Command [$s5]
The Slot MARKER command can be used to separately identify multiple PICCs in the RF field. The command and
response are ISO/IEC 14443-3:2001 compliant.
6.2.1 Operation
Slot MARKER is an optional command used to perform ISO/IEC 14443-3 Type B anticollision using the timeslot
approach. Immediately after an REQB or WUPB command with “N” greater than one is issued, and the ATQB response
(if any) is received, the PCD will transmit Slot MARKER commands with slot values “S” of two to “N” to define the start of
each timeslot for anticollision. If the random number “R” selected by the PICC matches “S” then the PICC responds with
ATQB. PICCs in the Active State are not permitted to answer this command.
Reader PICC
Command > S $5
CRC1
CRC2
ATQB Response > $50 SUCCESS RESPONSE
PUPI 0 System Zone Byte $00
PUPI 1 System Zone Byte $01
PUPI 2 System Zone Byte $02
PUPI 3 System Zone Byte $03
APP 0 System Zone Byte $04
APP1 System Zone Byte $05
APP 2 System Zone Byte $06
APP 3 System Zone Byte $07
Protocol 1 $00
Protocol 2 System Zone Byte $08
Protocol 3 $51
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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6.2.2 Command Field Description
S: The slot number “S” is encoded within the command byte as shown in Table 6-5.
CRC: Communication error detection bytes.
Table 6-5. Coding of the Slot Number within the Slot MARKER Command Byte.
6.2.3 Response Field Description
PUPI: PseudoUnique PICC Identifier. This is the card ID used for anticollision, stored in the System Zone.
APP: Application Data. Information about the card or application, stored in the System Zone.
Protocol: ISO/IEC 14443 communication capabilities reported to the PCD.
CRC: Communication error detection bytes.
6.2.4 Error Handling
If a Slot MARKER command containing errors is received by the PICC, it is ignored and no response is sent.
6.2.5 Notes
The Slot MARKER command is identical for 88SC and 88RF CryptoRF PICCs.
Bit 7 Bit 6 Bit 5 Bit 4 Slot
0 0 0 0 Not Supported
0001 2
0010 3
0011 4
0100 5
0101 6
0110 7
0111 8
1000 9
1 0 0 1 10
1010 11
1 0 1 1 12
1 1 0 0 13
1 1 0 1 14
1 1 1 0 15
1 1 1 1 16
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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6.3 ATTRIB Command [$1D]
The ATTRIB command is used to select a PICC for a transaction. The command and response are ISO/IEC
14443-3:2001 compliant.
6.3.1 Operation
Sending the ATTRIB command (with a matching PUPI) after an ATQB response places the PICC in the Active State and
assigns the Card ID Number (CID) to the PICC. PICCs already in the Active State or Halt State are not permitted to
answer this command.
Reader PICC
Command > $1D
PUPI 0
PUPI of PCI > PUPI 1
PUPI 2
PUPI 3
Param 1 > $00
Param 2 > $0 TBmax
Param 3 > $00
Param 4 Assigns CID > $0 CID
CRC1
CRC2
ATTRIB Response > $0 CID SUCCESS RESPONSE
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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6.3.2 Command Field Descriptions
PUPI: PseudoUnique PICC Identifier. This is the card ID used for anticollision, stored in the System Zone.
Param: ISO/IEC 14443 communication capabilities reported to the PICC. The contents of Param bytes one, two,
and three do not alter the behavior of CryptoRF PICCs.
TBmax: A parameter sent by the PCD reporting the receive buffer size of the PCD. Default value is $0.
CID: The Card ID Number (CID) in ATTRIB Param byte four and in the ATTRIB Response is encoded as shown
in Table 6-6 and Table 6-7. Each PICC is assigned a unique CID when it is placed in the Active State.
CryptoRF Active State commands use the assigned CID to direct the commands to the desired PICC.
Table 6-6. Coding of the Card ID in the ATTRIB Command and Response for 88SC PICCs.
Bit 7 Bit 6 Bit 5 Bit 4 CID
0 0 0 0 Not Supported
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1 0 1 0 10
1011 11
1 1 0 0 12
1 1 0 1 13
1 1 1 0 14
1 1 1 1 Not Supported
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table 6-7. Coding of the Card ID in the ATTRIB Command and Response for 88RF PICCs.
CRC: Communication error detection bytes.
6.3.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
CRC: Communication error detection bytes.
6.3.4 Error Handling
If an ATTRIB command containing transmission errors is received by the PICC, it is ignored and no response is sent.
6.3.5 Notes
The ATTRIB command for 88SC PICCs is used to assign a CID in the range of 1 to 15 to the PICC; CID = 0 is not
supported. The ATTRIB command for 88RF PICCs is used to assign a CID in the range of 0 to 15 to the PICC.
Bit 7 Bit 6 Bit 5 Bit 4 CID
0000 0
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1 0 1 0 10
1011 11
1 1 0 0 12
1 1 1 1 13
1 1 1 0 14
1 1 1 1 Not Supported
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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6.4 HLTB Command [$50]
The HLTB command places a PICC in the Halt State, where it is not allowed to answer an REQB command. The
command and response are ISO/IEC 14443-3 compliant.
6.4.1 Operation
Sending the “Halt B” (HLTB) command (with a matching PUPI) after an ATQB response places the PICC in the Halt
State. A PICC in the Halt State will only respond to a WUPB command. PICCs in the Active State or already in the Halt
State are not permitted to answer this command.
6.4.2 Command Field Descriptions
PUPI: PseudoUnique PICC Identifier. This is the card ID used for anticollision, stored in the System Zone.
CRC: Communication error detection bytes.
6.4.3 Response Field Description
CRC: Communication error detection bytes.
6.4.4 Error Handling
If a HLTB command containing errors is received by the PICC, it is ignored and no response is sent.
6.4.5 Notes
The HLTB command is identical for 88SC and 88RF CryptoRF PICCs.
Reader PICC
Command > $50
PUPI 0
PUPI of PCI > PUPI 1
PUPI 2
PUPI 3
CRC1
CRC2
HLTB Response > $00 SUCCESS RESPONSE
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7. Active State Command Definitions
Commands in this section are arranged in order by the hexadecimal code in the command byte. Several of the Active
state commands perform multiple functions; the value of the PARAM byte determines which function is performed.
Table 7-1. Coding of the Command Byte for the CryptoRF Active State Command Set
7.1 Response Format
The response to each Active State command consists of five bytes or more. The first byte of the response is the
command byte echoed back to the PCD. The second byte is the ACK/NACK byte which reports success or failure of the
command execution. The final two bytes of the response are always the CRC bytes. The CRC bytes are preceded by a
STATUS byte which reports error codes or PICC status codes. Any data bytes returned by the command are located
between the ACK/NACK and STATUS bytes.
Table 7-2. Coding of the ACK/NACK Byte of the PICC Response
The ACK/NACK byte reports success or failure of the command execution. In the event of a Check Password command
failure or Verify Crypto command failure the ACK/NACK byte contains an attempts count coded as shown in Table 7-3
and Table 7-4.
The STATUS byte provides information to the host application indicating the state of the PICC or the reason for failure of
a requested operation. The STATUS byte does not report the success or failure of a command. In the event of multiple
errors, the STATUS byte reports the first error detected.
The PICC ignores commands that do not have a matching CID. Invalid command codes are also ignored.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Command Name Hexadecimal
CID 0 0 0 1 Set User Zone $c1
CID 0 0 1 0 Read User Zone $c2
CID 0 0 1 1 Write User Zone $c3
CID 0 1 0 0 Write System Zone $c4
CID 0 1 1 0 Read System Zone $c6
CID 1 0 0 0 Verify Crypto $c8
CID 1 0 0 1 Send Checksum $c9
CID 1 0 1 0 DESELECT $cA
CID 1 0 1 1 IDLE $cB
CID 1 1 0 0 Check Password $cC
All Other Values Are Not Supported.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Response Decode
0 0 0 0 0 0 0 0 ACK
0 0 0 0 0 0 0 1 NACK, See STATUS byte for PICC information.
Password Attempts Count 0 0 0 1 NACK, Check Password Attempt Failure.
Auth. Attempts Count 0 0 0 1 NACK, Authentication or Encryption Attempt Failure.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table 7-3. Coding of the Password Attempts Count or Authentication Attempts Count in the 88SC ACK/NACK Byte.
Table 7-4. Coding of the Password Attempt Count or Authentication Attempts Count in the 88RF ACK/NACK Byte.
Hexadecimal Bit 7 Bit 6 Bit 5 Bit 4 Description
$0 0 0 0 0 No Failed Attempts
$1 0 0 0 1 1 Failed Attempt
$2 0 0 1 0 2 Failed Attempts
$3 0 0 1 1 3 Failed Attempts
$4 0 1 0 0 4 Failed Attempts
$5 0 1 0 1 5 Failed Attempts
$6 0 1 1 0 6 Failed Attempts
$7 0 1 1 1 7 Failed Attempts
$8 1 0 0 0 8 Failed Attempts
Hexadecimal Bit 7 Bit 6 Bit 5 Bit 4 Description
$0 0 0 0 0 No Failed Attempts
$1 0 0 0 1 1 Failed Attempt
$2 0 0 1 0 2 Failed Attempts
$3 0 0 1 1 3 Failed Attempts
$4 0 1 0 0 4 Failed Attempts
$5 0 1 0 1 5 Failed Attempts
$6 0 1 1 0 6 Failed Attempts
$7 0 1 1 1 7 Failed Attempts
$8 1 0 0 0 8 Failed Attempts
$9 1 0 0 1 9 Failed Attempts
$A 1 0 1 0 10 Failed Attempts
$B 1 0 1 1 11 Failed Attempts
$C 1 1 0 0 12 Failed Attempts
$D 1 1 0 1 13 Failed Attempts
$E 1 1 1 0 14 Failed Attempts
$F 1 1 1 1 15 Failed Attempts (LOCK)
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.2 Set User Zone Command [$c1]
The Set User Zone command selects the user memory area to be addressed by the Read User Zone and Write User
Zone commands.
7.2.1 Operation
Before reading and writing data to the user memory, the host must select a User Zone with this command. Only one User
Zone may be selected at a time. At the time the zone is selected the host also chooses whether anti-tearing is active for
the selected zone. If anti-tearing is activated, then all writes to the User Zone will utilize anti-tearing until a new Set User
Zone command is received. Only PICCs in the Active State are permitted to answer this command.
7.2.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: Selects the User Zone and sets anti-tearing on or off.
Table 7-5. Definition of the PARAM Byte of the Set User Zone Command
Table 7-6. Coding of the Anti-Tearing Select Bit within the PARAM Byte
Reader PICC
Command > CID $1
PARAM
CRC1
CRC2
Echo Response > CID $1
ACK/NACK
STATUS
CRC1
CRC2
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
AT 0 0 0 User Zone
Bit 7 Write User Zone
0Normal Write Enabled
1Anti-Tearing Write Enabled
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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Table 7-7. Coding of the User Zone Number within the PARAM Byte
CRC: Communication error detection bytes.
7.2.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
7.2.4 Error Handling
If a Set User Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent.
Table 7-8. Status Codes Returned in the Set User Zone Response
7.2.5 Notes
The Set User Zone command is identical for 88SC and 88RF CryptoRF PICCs.
Bit 3 Bit 2 Bit 1 Bit 0 User Zone
00000
00011
00102
00113
01004
01015
01106
01117
10008
10019
1 0 1 0 10
101111
1 1 0 0 12
1 1 0 1 13
1 1 1 0 14
1 1 1 1 15
Error/Status Message Status Code Type
No Errors $00 ACK
User Zone PARAM Invalid $A1 NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.3 Read User Zone Command [$c2]
The Read User Zone command reads data from the currently selected User Zone. See Read User Zone (Large Memory)
command for the AT88SC6416CRF read command information.
Reader PICC
Command > CID $2
PARAM = $00 > PARAM
ADDR
“L”
CRC1
CRC2
Echo Command > CID $2 FAILURE RESPONSE
NACK
STATUS < Error Code
CRC1
CRC2
Echo Command > CID $2 SUCCESS RESPONSE
ACK
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
STATUS <Status Code
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.3.1 Operation
The Read User Zone command reads data from the device's currently selected User Zone.
The data byte address is internally incremented as each byte is read from memory. Reading beyond the end of the
current User Zone is prohibited. Only PICCs in the Active State are permitted to answer this command.
If Encryption Communication Security is active the DATA bytes are encrypted; no other bytes are encrypted. In the
Normal and Authentication Communication Security modes none of the bytes are encrypted.
7.3.2 Command Field Descriptions
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of read operation to be performed. PARAM = $00 selects the normal
Read User Zone command.
ADDR: The starting address of the data to read.
L: The number of bytes to read minus one. L cannot exceed the size of the user zone.
Reading more than 64 bytes in a single operation is not recommended. In a typical application environment, optimal
transaction time is achieved by reading no more than 32 data bytes in a single operation.
CRC: Communication error detection bytes.
7.3.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
DATA: The data bytes read from user memory.
STATUS: PICC status code.
CRC: Communication error detection bytes.
7.3.4 Error Handling
If a Read User Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-9. Status Codes Returned in the Read User Zone Response
7.3.5 Notes
The Read User Zone command is identical for 88SC and 88RF CryptoRF PICCs when PARAM = $00.
Error/Status Message Status Code Type
No errors $00 ACK
Access Denied (User Zone Not Set) $99 NACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Authentication or Encryption Activation Required $A9 NACK
Password Required $D9 NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.4 Read User Zone (Large Memory) Command [$c2]
The Read User Zone (Large Memory) command reads data from the currently selected User Zone. This command
format applies to the AT88SC6416CRF device only.
7.4.1 Operation
The Read User Zone (Large Memory) command operates identically to the standard Read User Zone command, but
utilizes a two byte address to support large memory sizes. The Read User Zone command reads data from the device's
currently selected User Zone.
The data byte address is internally incremented as each byte is read from memory. Reading beyond the end of the
current User Zone is prohibited. Only PICCs in the Active State are permitted to answer this command.
If Encryption Communication Security is active the DATA bytes are encrypted; no other bytes are encrypted. In the
Normal and Authentication Communication Security modes none of the bytes are encrypted.
Reader PICC
Command > CID $2
PARAM = ADDR H ADDR H
ADDR L
“L”
CRC1
CRC2
Echo Command > CID $2 FAILURE RESPONSE
NACK
STATUS < Error Code
CRC1
CRC2
Echo Command > CID $2 SUCCESS RESPONSE
ACK
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
STATUS <Status Code
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.4.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte is the ADDR H byte of Read User Zone (Large Memory) command.
Table 7-10. Definition of the PARAM (ADDR H) Byte of the Read User Zone (Large Memory) Command
ADDR: The two byte starting address of the location to read.
L: The number of bytes to read minus one. L cannot exceed the size of the user zone.
Reading more than 64 bytes in a single operation is not recommended. In a typical application environment, optimal
transaction time is achieved by reading no more than 32 data bytes in a single operation.
CRC: Communication error detection bytes.
7.4.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
DATA: The data bytes read from user memory.
STATUS: PICC status code.
CRC: Communication error detection bytes.
7.4.4 Error Handling
If a Read User Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-11. Status Codes Returned in the Read User Zone (Large Memory) Response.
7.4.5 Notes
The Read User Zone (Large Memory) command is not supported by 88RF PICCs.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 0 0 0 0 A8
Error/Status Message Status Code Type
Error/Status Message Status Code Type
No errors $00 ACK
Access Denied (User Zone Not Set) $99 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Authentication or Encryption Activation Required $A9 NACK
Password Required $D9 NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.5 Read User Zone Command with Integrated MAC [$c2] [88RF]
The Read User Zone command with Integrated MAC reads data from the currently selected User Zone on 88RF PICCs.
This command can only be used when the Authentication or Encryption Communication Security mode is active.
Reader PICC
Command > CID $2
PARAM = $80 > PARAM
ADDR
“L”
CRC1
CRC2
Echo Command > CID $2 FAILURE RESPONSE
NACK
STATUS < Error Code
CRC1
CRC2
Echo Command > CID $2 SUCCESS RESPONSE
ACK
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
MAC1 < Checksum
MAC2
STATUS < Status Code
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.5.1 Operation
The Read User Zone command with Integrated MAC reads data from the 88RF device's currently selected User Zone
and also returns the cryptographic checksum. If the RCS bit of the DCR register is set to 1b, then the cryptographic
engine is reset after the checksum is read. If the RCS bit of the DCR register is set to 0b, then the cryptographic engine
is not reset by this command.
The data byte address is internally incremented as each byte is read from memory. Reading beyond the end of the
current User Zone is prohibited. Only PICCs in the Active State are permitted to answer this command. If the
Authentication or Encryption Communication Security mode is not active, then a NACK response is returned.
If the Encryption Communication Security mode is active, then the DATA bytes are encrypted. In Authentication
Communication Security mode the DATA bytes are not encrypted.
7.5.2 Command Field Descriptions
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of read operation to be performed.
Table 7-12. PARAM Byte Options for the Read User Zone Command for 88RF PICCs.
ADDR: The starting address of the data to read.
L: The number of bytes to read minus one. L cannot exceed the size of the user zone.
Reading more than 64 bytes in a single operation is not recommended. In a typical application environment, optimal
transaction time is achieved by reading no more than 32 data bytes in a single operation.
CRC: Communication error detection bytes.
7.5.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
DATA: The data bytes read from user memory.
MAC: The checksum bytes read from the cryptographic engine.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Command PARAM
Read User Zone (Normal/Legacy) $00
Read User Zone with Integrated MAC $80
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.5.4 Error Handling
If a Read User Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-13. Status Codes Returned in the Read User Zone Response
7.5.5 Notes
The Read User Zone command with Integrated MAC is not supported by 88SC PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
Access Denied (User Zone Not Set) $99 NACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Authentication or Encryption Activation Required $A9 NACK
Password Required $D9 NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.6 Write User Zone Command [$c3]
The Write User Zone command writes data into the currently selected User Zone. See Write User Zone (Large Memory)
command for the AT88SC6416CRF write command information.
7.6.1 Operation
The Write User Zone command writes data in the device's currently selected User Zone. As each byte is clocked in to the
memory the lower bits of the address are internally incremented. The upper address bits are not incremented, so the
page address remains constant.
Write operations cannot cross page boundaries; a Write User Zone command can only write data bytes within a single
physical memory page. Attempts to write beyond the end of the page boundary will wrap to the beginning of the same
page. Only PICCs in the Active State are permitted to answer this command.
If Encryption Communication Security is active the DATA bytes are encrypted; no other bytes are encrypted. In the
Normal and Authentication Communication Security modes none of the bytes are encrypted.
The Write User Zone command includes an automatic data verification function when used on 88RF PICCs. After the
EEPROM write is complete the data verification logic reads the new EEPROM contents and compares it to the data
received in the Write User Zone command. If the data does not match then the PICC returns a NACK response with $ED
in the status byte. If the data matches, the PICC returns an ACK response.
Reader PICC
Command > CID $3
PARAM =$00 > PARAM
ADDR
“L”
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
CRC1
CRC2
Echo Command > CID $3
ACK/NACK
STATUS
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.6.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of write operation to be performed. PARAM = $00 selects the normal
Write User Zone command.
ADDR: The starting address of the location to be written.
L: The number of bytes to read minus one. “L” cannot exceed the physical page size of the memory. In
Anti-Tearing mode, the maximum number of bytes that can be written is eight bytes. If the Access Register
enables Write Lock mode or Program Only mode, the maximum number of bytes that can be written is one
byte.
Table 7-14. Write Characteristics of CryptoRF
DATA: The data bytes to be written into user memory.
CRC: Communication error detection bytes.
7.6.3 Response Field Description
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
CryptoRF
Part Number
Write Characteristics
Standard Write Anti-Tearing Write
AT88RF04C 1 to 16 bytes 1 to 8 bytes
AT88SC0808CRF 1 to 16 bytes 1 to 8 bytes
AT88SC1616CRF 1 to 16 bytes 1 to 8 bytes
AT88SC3216CRF 1 to 32 bytes 1 to 8 bytes
AT88SC6416CRF 1 to 32 bytes 1 to 8 bytes
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.6.4 Error Handling
If a Write User Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-15. Status Codes Returned in the Write User Zone Response
7.6.5 Notes
The Write User Zone command is identical for 88SC and 88RF CryptoRF PICCs when PARAM = $00. Automatic data
write verification is performed by 88RF PICCs; this function is not supported by 88SC PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
Write Pending – Checksum Required $0C ACK
One Byte Written (Write Lock Mode) $1B ACK
Access Denied (User Zone Not Set) $99 NACK
Access Denied (Security Fuses Invalid) $99 NACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Authentication or Encryption Activation Required $A9 NACK
Data Written (Program Only Mode) $B0 ACK
Access denied (Write Lock Mode) $B9 NACK
Checksum Failure $C9 NACK
Password Required $D9 NACK
Modify Forbidden $E9 NACK
Memory Write Error - Data Mismatch $ED NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.7 Write User Zone (Large Memory) Command [$c3]
The Write User Zone command writes data into the currently selected User Zone. This command format applies to the
AT88SC6416CRF device only.
7.7.1 Operation
The Write User Zone (Large Memory) command operates identically to the normal Write User Zone command, but
utilizes a two byte address to support large memory sizes. The Write User Zone command writes data in the device's
currently selected User Zone. As each byte is clocked in to the memory the lower bits of the address are internally
incremented. The upper address bits are not incremented, so the page address remains constant.
Write operations cannot cross page boundaries; a Write User Zone command can only write data bytes within a single
physical memory page. Attempts to write beyond the end of the page boundary will wrap to the beginning of the same
page. Only PICCs in the Active State are permitted to answer this command.
If Encryption Communication Security is active the DATA bytes are encrypted; no other bytes are encrypted. In the
Normal and Authentication Communication Security modes none of the bytes are encrypted.
Reader PICC
Command > CID $3
PARAM = ADDR H ADDR H
ADDR L
“L”
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
CRC1
CRC2
Echo Command > CID $3
ACK/NACK
STATUS
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.7.2 Command Field Descriptions
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte is the ADDR H byte of Write User Zone (Large Memory) command.
Table 7-16. Definition of the PARAM (ADDR H) Byte of the Write User Zone (Large Memory) Command
ADDR: The two byte starting address of the location to be written.
L: The number of bytes to read minus one. “L” cannot exceed the physical page size of the memory. In
Anti-Tearing mode, the maximum number of bytes that can be written is eight bytes. If the Access Register
enables Write Lock mode or Program Only mode, the maximum number of bytes that can be written is one
byte.
Table 7-17. Write Characteristics of Large Memory CryptoRF
DATA: The data bytes to be written into user memory.
CRC: Communication error detection bytes.
7.7.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 0 0 0 0 A8
CryptoRF
Part Number
Write Characteristics
Standard Write Anti-Tearing Write
AT88SC6416CRF 1 to 32 bytes 1 to 8 bytes
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.7.4 Error Handling
If a Write User Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-18. Status Codes Returned in the Write User Zone (Large Memory) Response
7.7.5 Notes
The Write User Zone (Large Memory) command is not supported by 88RF PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
Write Pending – Checksum Required $0C ACK
One Byte Written (Write Lock Mode) $1B ACK
Access Denied (User Zone Not Set) $99 NACK
Access Denied (Security Fuses Invalid) $99 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Authentication or Encryption Activation Required $A9 NACK
Data Written (Program Only Mode) $B0 ACK
Access denied (Write Lock Mode) $B9 NACK
Password Required $D9 NACK
Modify Forbidden $E9 NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.8 Write User Zone Command with Integrated MAC [$c3] [88RF]
The Write User Zone command with Integrated MAC writes data into the currently selected User Zone of 88RF PICCs.
This command can only be used when the Authentication or Encryption Communication Security mode is active.
7.8.1 Operation
The Write User Zone command with Integrated MAC writes data in the 88RF device's currently selected User Zone. As
each byte is clocked in to the memory the lower bits of the address are internally incremented. The upper address bits
are not incremented, so the page address remains constant.
Write operations cannot cross page boundaries; a Write User Zone command can only write data bytes within a single
physical memory page. Attempts to write beyond the end of the page boundary will wrap to the beginning of the same
page. Only PICCs in the Active State are permitted to answer this command. If the Authentication or Encryption
Communication Security mode is not active, then a NACK response is returned. If the checksum does not match, then a
NACK response is returned, the write operation is aborted, and the cryptographic engine is reset.
The Write User Zone command with Integrated MAC includes an automatic data verification function. After the EEPROM
write is complete the data verification logic reads the new EEPROM contents and compares it to the data received in the
Write User Zone command. If the data does not match the PICC returns a NACK response with $ED in the status byte. If
the data matches, the PICC returns an ACK response.
If the Encryption Communication Security mode is active, then the DATA bytes are encrypted. In Authentication
Communication Security mode the DATA bytes are not encrypted.
Reader PICC
Command > CID $3
PARAM = $80 > PARAM
ADDR
“L”
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
Checksum > MAC1
MAC2
CRC1
CRC2
Echo Command > CID $3
ACK/NACK
STATUS
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.8.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of write operation to be performed.
Table 7-19. PARAM Byte Options for the Write User Zone Command for 88RF PICCs.
ADDR: The starting address of the location to be written.
L: The number of bytes to write minus one. “L” cannot exceed the 16 byte physical page size of the memory. In
Anti-Tearing mode, the maximum number of bytes that can be written is eight bytes.
Table 7-20. Write Characteristics of 88RF PICCs
DATA: The data bytes to be written into user memory.
MAC: The checksum bytes sent to the cryptographic engine.
CRC: Communication error detection bytes.
7.8.3 Response Field Description
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Command PARAM
Write User Zone (Normal / Legacy) $00
Write User Zone with Integrated MAC $80
All Other Values Are Not Supported.
CryptoRF
Part Number
Write Characteristics
Normal Write Anti-Tearing Write
AT88RF04C 1 to 16 bytes 1 to 8 bytes
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.8.4 Error Handling
If a Write User Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-21. Status Codes Returned in the Write User Zone Response
7.8.5 Notes
The Write User Zone command with Integrated MAC is not supported by 88SC PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
Write Pending — Checksum Required $0C ACK
Access Denied (User Zone Not Set) $99 NACK
Access Denied (Security Fuses Invalid) $99 NACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Authentication or Encryption Activation Required $A9 NACK
Data Written (Program Only Mode) $B0 ACK
Checksum Failure $C9 NACK
Password Required $D9 NACK
Modify Forbidden $E9 NACK
Memory Write Error — Data Mismatch $ED NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.9 Write System Zone Command [$c4]
The Write System Zone command writes data to the configuration memory.
7.9.1 Operation
The Write System Zone command writes data into the configuration memory. As each byte is clocked in to the memory
the lower bits of the address are internally incremented. The upper address bits are not incremented, so the page
address remains constant.
Write operations cannot cross page boundaries; a Write System Zone command can only write data bytes within a single
physical memory page. Attempts to write beyond the end of the page boundary will wrap to the beginning of the same
page. Only PICCs in the Active State are permitted to answer this command.
If Authentication or Encryption Communication Security is active the DATA bytes written to the password (PW) registers
are encrypted; no other bytes are encrypted. In the Normal Communication Security mode none of the bytes are
encrypted.
The Write System Zone command includes an automatic data verification function when used on 88RF PICCs. After the
EEPROM write is complete the data verification logic reads the new EEPROM contents and compares it to the data
received in the Write System Zone command. If the data does not match then the PICC returns a NACK response with
$ED in the status byte. If the data matches, the PICC returns an ACK response.
Reader PICC
Command > CID $4
PARAM = $00 > PARAM
ADDR
“L”
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
CRC1
CRC2
Echo Command > CID $4
ACK/NACK
STATUS
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.9.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of write operation to be performed. 88RF PICCs do not support
anti-tearing writes to the configuration memory.
Table 7-22. PARAM Byte Options for the Write System Zone Command
ADDR: The starting address of the data to write.
L: The number of bytes to read minus one. L cannot exceed the physical page size of the memory. In
Anti-Tearing mode, the maximum number of bytes that can be written is eight bytes.
Table 7-23. Write Characteristics of CryptoRF Configuration Memory
DATA: The data bytes to be written into configuration memory.
CRC: Communication error detection bytes.
7.9.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Command PARAM ADDR “L” DATA
Write System Zone $00 Address # of bytes – 1 “L + 1” bytes
Write System Zone w/ AT $80 Address # of bytes – 1 “L + 1 bytes”
Write Fuse Byte $01 Fuse addr $00 1 byte
All Other Values Are Not Supported.
CryptoRF
Part Number
Write Characteristics
Standard Write Anti-Tearing Write
AT88RF04C 1 to 16 bytes Not Supported
AT88SC0808CRF 1 to 16 bytes 1 to 8 bytes
AT88SC1616CRF 1 to 16 bytes 1 to 8 bytes
AT88SC3216CRF 1 to 32 bytes 1 to 8 bytes
AT88SC6416CRF 1 to 32 bytes 1 to 8 bytes
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.9.4 Error Handling
If a Write System Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-24. Status Codes Returned in the Write System Zone Response
7.9.5 Notes
The Write System Zone command is identical for 88SC and 88RF CryptoRF PICCs when PARAM = $00. 88RF PICCs do
not support PARAM = $80. Automatic data write verification is performed by 88RF PICCs; this function is not supported
by 88SC PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Integrated Checksum Mode Write Complete $B0 ACK
Access denied (Write Not Allowed) $BA NACK
Checksum Failure $C9 NACK
Password Required $D9 NACK
Memory Write Error — Data Mismatch $ED NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.10 Write System Zone Command with Integrated MAC [$c4] [88RF]
The Write System Zone command with Integrated MAC writes data to the 88RF PICC configuration memory. This
command can only be used when the Encryption Communication mode is active. This command is only available when
the Security fuses are: SEC = 0b, ENC = 0b, SKY = 1b, PER = 1b.
7.10.1 Operation
The Write System Zone command with Integrated MAC writes data into the 88RF PICC configuration memory. As each
byte is clocked in to the memory the lower bits of the address are internally incremented. The upper address bits are not
incremented, so the page address remains constant.
Write operations cannot cross page boundaries; a Write System Zone command can only write data bytes within a single
physical memory page. Attempts to write beyond the end of the page boundary will wrap to the beginning of the same
page. Only PICCs in the Active State are permitted to answer this command. If the Encryption Communication mode is
not active, then a NACK response is returned. If the checksum does not match, then a NACK response is returned, the
write operation is aborted, and the cryptographic engine is reset.
The Write System Zone command with Integrated MAC includes an automatic data verification function. After the
EEPROM write is complete the data verification logic reads the new EEPROM contents and compares it to the data
received in the Write System Zone command. If the data does not match the PICC returns a NACK response with $ED in
the status byte. If the data matches, the PICC returns an ACK response.
Reader PICC
Command > CID $4
PARAM
ADDR
“L”
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
Checksum > MAC1
MAC2
CRC1
CRC2
Echo Command > CID $4
ACK/NACK
STATUS
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.10.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of write operation to be performed.
Table 7-25. PARAM Byte Options for the Write System Zone Command for 88RF PICCs
ADDR: The starting address of the data to write.
L: The number of bytes to write minus one. L cannot exceed the 16 byte physical page size of the memory.
DATA: The data bytes to be written into configuration memory.
MAC: The checksum bytes sent to the cryptographic engine.
CRC: Communication error detection bytes.
7.10.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Command PARAM ADDR “L” DATA
Write System Zone (Normal / Legacy) $00 Address # of bytes – 1 “L + 1” bytes
Write Fuse Byte $01 Fuse addr $00 1 byte
Write System Zone with Integrated MAC $08 Address # of bytes – 1 “L + 1 bytes”
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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7.10.4 Error Handling
If a Write System Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-26. Status Codes Returned in the Write System Zone with Integrated MAC Response
7.10.5 Notes
The Write System Zone command with Integrated MAC is not supported by 88SC PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Integrated Checksum Mode Write Complete $B0 ACK
Access denied (Write Not Allowed) $BA NACK
Checksum Failure $C9 NACK
Password Required $D9 NACK
Memory Write Error - Data Mismatch $ED NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.11 Write System Zone Command, Write Fuse Byte Option [$c4]
The Write Fuse Byte Option of the Write System Zone command is used to program the security fuses.
7.11.1 Operation
The Write Fuse Byte Option of the Write System Zone command programs the security fuses. Once programmed, the
fuses cannot be erased. This operation can be performed in the Normal, Authentication, or Encryption Communication
modes. The fuse byte value is never encrypted. Only PICCs in the Active State are permitted to answer this command.
7.11.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of write operation to be performed.
Table 7-27. PARAM Byte Options for the Write System Zone Command
ADDR: When performing a Fuse Byte Write, the ADDR byte contains the address of the fuse; only one fuse may be
programmed per Write System Zone command.
Reader PICC
Command > CID $4
PARAM = $01 > PARAM
ADDR
L = $00 > “L”
DATA 1
CRC1
CRC2
Echo Command > CID $4
ACK/NACK
STATUS
CRC1
CRC2
Command PARAM ADDR “L” DATA
Write System Zone $00 Address # of bytes – 1 “L + 1” bytes
Write System Zone w/ AT $80 Address # of bytes – 1 “L + 1 bytes”
Write Fuse Byte $01 Fuse addr $00 1 byte
All Other Values Are Not Supported
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014
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Table 7-28. Coding of ADDR for 88SC PICC Fuse Programming
Table 7-29. Coding of ADDR for 88RF PICC Fuse Programming
L: The number of bytes to write minus one. L must be $00 when writing the Fuse Bytes.
DATA: One byte of data is required to be sent when writing the fuse byte; however, the contents of this byte are
ignored.
CRC: Communication error detection bytes.
7.11.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge; the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Hex Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Fuse
$07 0 0 0 0 0 1 1 1 SEC
$06 0 0 0 0 0 1 1 0 FAB
$04 0 0 0 0 0 1 0 0 CMA
$00 0 0 0 0 0 0 0 0 PER
Hex Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Fuse
$07 0 0 0 0 0 1 1 1 SEC
$06 0 0 0 0 0 1 1 0 ENC
$04 0 0 0 0 0 1 0 0 SKY
$00 0 0 0 0 0 0 0 0 PER
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.11.4 Error Handling
If a Write System Zone command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-30. Status Codes Returned in the Write System Zone Response for Fuse Byte Writes
7.11.5 Notes
The Write Fuse Byte option of the Write System Zone command is identical for 88SC and 88RF CryptoRF PICCs.
Error/Status Message Status Code Type
Fuse Byte (Successful Fuse Byte Write) Fuse byte ACK
Fuse Address Invalid $A2 NACK
Length Invalid $A3 NACK
Password Required $D9 NACK
Fuse Access Denied $DF NACK
Access denied (Fuse Order Incorrect) $E9 NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.12 Read System Zone Command [$c6]
The System Read command allows reading of system data from the configuration memory.
7.12.1 Operation
The Read System Zone command reads from the devices configuration memory. The data byte address is internally
incremented as each byte is read from the memory. If the data byte address increments into a segment where read
access is forbidden, the “fuse byte” is transmitted in place of the forbidden data. Only PICCs in the Active State are
permitted to answer this command.
If Authentication or Encryption Communication Security is active the DATA bytes read from the password (PW) registers
are encrypted; no other bytes are encrypted. In the Normal Communication Security mode none of the bytes are
encrypted.
Reader PICC
Command > CID $6
PARAM
ADDR
“L”
CRC1
CRC2
Echo Command > CID $6 FAILURE RESPONSE
NACK
STATUS < Error Code
CRC1
CRC2
Echo Command > CID $6 SUCCESS RESPONSE
ACK
DATA 1
DATA 2
……….
DATA “L”
DATA “L+1”
STATUS <Status Code
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.12.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of read operation to be performed.
Table 7-31. PARAM Byte Options for the Read System Zone Command
ADDR: The starting address of the data to read.
L: The number of bytes to read minus one. L cannot exceed 240 bytes.
Reading more than 64 bytes in a single operation is not recommended. In a typical application environment, optimal
transaction time is achieved by reading no more than 32 bytes in a single operation.
CRC: Communication error detection bytes.
7.12.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
DATA: The data bytes read from the configuration memory.
Since access rights vary throughout the system zone, the host may provide an authorized starting address, but a length
that causes the device to reach forbidden data. In this case, the device will transmit the authorized bytes, but
unauthorized bytes will be replaced by the “fuse byte”. An “Access Denied” status code $BA or $BC will be returned to
indicate that some of the bytes returned were replaced by the “fuse byte”.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Command PARAM ADDR “L”
Read System Zone $00 Address # of bytes – 1
Read Fuse Byte $01 $FF $00
Read Checksum $02 $FF $01
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.12.4 Error Handling
If a Read System Zone command containing transmission errors is received by the PICC, it is ignored and no response
is sent. The PICC reports errors in the status byte of the response.
Table 7-32. Status Codes Returned in the Read System Zone Response
7.12.5 Notes
The Read System Zone command is identical for 88SC and 88RF CryptoRF PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Byte Access denied (Read Not Allowed) $BA ACK/NACK
Byte Access denied (Password Required) $BC ACK/NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.13 Read System Zone Command, Read Fuse Byte Option [$c6]
The Read Fuse Byte Option of the Read System Zone command reads the security fuse byte.
7.13.1 Operation
The Read Fuse Byte Option of the Read System Zone command reads the Security Fuse byte. This operation can be
performed in the Normal, Authentication, or Encryption Communication modes. The fuse byte value is never encrypted.
Only PICCs in the Active State are permitted to answer this command.
Reader PICC
Command > CID $6
PARAM = $01 > PARAM
ADDR = $FF > ADDR
L = $00 > “L”
CRC1
CRC2
Echo Command > CID $6 FAILURE RESPONSE
NACK
STATUS < Error Code
CRC1
CRC2
Echo Command > CID $6 SUCCESS RESPONSE
ACK
DATA 1 < Fuse Byte
STATUS <Status Code
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.13.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of read operation to be performed. PARAM must be $01 for Read Fuse
Byte.
Table 7-33. PARAM byte options for the Read System Zone command.
ADDR: The address must be $FF for Read Fuse Byte.
L: The number of bytes to read minus one. L must be $00 for Read Fuse Byte.
CRC: Communication error detection bytes.
7.13.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
DATA: The Security Fuse Byte value.
Figure 7-1. Definition of the DATA Byte Received When Reading the Fuse Byte of 88SC PICCs
Figure 7-2. Coding of the DATA Byte Received When Reading the Fuse Byte of 88RF PICCs
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Command PARAM ADDR “L”
Read System Zone $00 Address # of bytes – 1
Read Fuse Byte $01 $FF $00
Read Checksum $02 $FF $01
All Other Values Are Not Supported.
F7 F6 F5 F4 F3 F2 F1 F0
RFU RFU RFU RFU SEC PER CMA FAB
X X X X 0 1 1 1 Default Value
F7 F6 F5 F4 F3 F2 F1 F0
RFU RFU RFU RFU SEC ENC SKY FAB
X X X X 0 1 1 1 Default Value
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.13.4 Error Handling
If a Read System Zone command containing transmission errors is received by the PICC, it is ignored and no response
is sent. The PICC reports errors in the status byte of the response.
Table 7-34. Status Codes Returned in the Read System Zone Response When Reading the Fuse Byte.
7.13.5 Notes
The Read Fuse Byte Option of the Read System Zone command is identical for 88SC and 88RF CryptoRF PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.14 Read System Zone Command, Read Checksum Option [$c6]
The Read Checksum Option of the System Read command reads the checksum from the cryptographic engine.
7.14.1 Operation
The Read Checksum Option of the Read System Zone command reads the checksum from the cryptographic engine.
This operation can be performed in the Normal, Authentication, or Encryption Communication modes. Only PICCs in the
Active State are permitted to answer this command.
Reader PICC
Command > CID $6
PARAM = $02 > PARAM
ADDR = $FF > ADDR
L = $01 > “L”
CRC1
CRC2
Echo Command > CID $6 FAILURE RESPONSE
NACK
STATUS < Error Code
CRC1
CRC2
Echo Command > CID $6 SUCCESS RESPONSE
ACK
DATA 1 < MAC1
DATA 2 < MAC2
STATUS <Status Code
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.14.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
PARAM: The PARAM byte selects the type of read operation to be performed. PARAM must be $02 for Read
Checksum.
Table 7-35. PARAM byte options for the Read System Zone command.
ADDR: The address must be $FF for Read Checksum.
L: The number of bytes to read minus one. L must be $01 for Read Checksum.
CRC: Communication error detection bytes.
7.14.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
DATA: The two checksum bytes read from the cryptographic engine.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
7.14.4 Error Handling
If a Read System Zone command containing transmission errors is received by the PICC, it is ignored and no response
is sent. The PICC reports errors in the status byte of the response.
Table 7-36. Status Codes returned in the Read System Zone response for Read Checksum.
7.14.5 Notes
The Read Checksum Option of the Read System Zone command is identical for 88SC and 88RF CryptoRF PICCs.
Command PARAM ADDR “L”
Read System Zone $00 Address # of bytes – 1
Read Fuse Byte $01 $FF $00
Read Checksum $02 $FF $01
All Other Values Are Not Supported.
Error/Status Message Status Code Type
No errors $00 ACK
PARAM Invalid $A1 NACK
Address Invalid $A2 NACK
Length Invalid $A3 NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.15 Verify Crypto Command [$c8]
The Verify Crypto command is used to activate the Authentication Communication Security mode and the Encryption
Communication Security mode.
7.15.1 Operation
The Verify Crypto command is used to perform mutual authentication between the PICC and the Host system. The Verify
Crypto command is also used to activate the Encryption Communication Security mode.
Only PICCs in the Active State are permitted to answer this command.
Reader PICC
Command > CID $8
Key Index
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CRC1
CRC2
Echo Command > CID $8
ACK/NACK
STATUS
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.15.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
Key Index: Selects the secret key to be used. The Authentication process uses one of the Secret Seeds Gi. Encryption
Activation uses a Session Encryption Key Si.
Table 7-37. Key Index Coding for the Verify Crypto Command
Q: The Host random number.
CH: The Host challenge.
CRC: Communication error detection bytes.
7.15.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
7.15.4 Error Handling
If a Verify Crypto command containing transmission errors is received by the PICC, it is ignored and no response is sent.
The PICC reports errors in the status byte of the response.
Table 7-38. Status Codes returned in the Verify Crypto response
7.15.5 Notes
The Verify Crypto command is identical for 88SC and 88RF CryptoRF PICCs.
Key Index Key
$00 Secret Seed G0
$01 Secret Seed G1
$02 Secret Seed G2
$03 Secret Seed G3
$10 Session Encryption Key S0
$11 Session Encryption Key S1
$12 Session Encryption Key S2
$13 Session Encryption Key S3
All Other Values Are Not Supported.
Error/Status Message Status Code Type
No errors $00 ACK
Invalid Key Index $99 NACK
Authentication or Encryption Activation Failure $A9 NACK
Memory Access Error (Security Operation) $F9 NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.16 Send Checksum Command [$c9]
The Send Checksum command is used to authenticate data sent to the PICC in the Authentication Communication
Security mode or the Encryption Communication Security mode.
7.16.1 Operation
When a Write User Zone command is sent in Authentication Communication mode or Encryption Communication mode
the data received by the PICC is saved in a buffer until a cryptographic Checksum is received. The host uses the Send
Checksum command to transmit the Checksum it has computed. If the checksum is valid the PICC writes the data; if the
checksum is incorrect the data is discarded and the cryptographic engine is reset.
Only PICCs in the Active State are permitted to answer this command.
7.16.2 Command Field Description
CID: The Card ID assigned by the ATTRIB command.
MAC: The cryptographic checksum computed by the Host.
CRC: Communication error detection bytes.
7.16.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
Reader PICC
Command > CID $9
MAC1
MAC2
CRC1
CRC2
Echo Command > CID $9
ACK/NACK
STATUS
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.16.4 Error Handling
If a Send Checksum command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-39. Status Codes Returned in the Send Checksum Response
7.16.5 Notes
The Send Checksum command is identical for 88SC and 88RF CryptoRF PICCs.
Error/Status Message Status Code Type
Error/Status Message Status Code Type
No errors $00 ACK
Checksum Failure $C8 NACK
Checksum Failure $C9 NACK
Memory Write Error - Data Mismatch $ED NACK
Memory Access Error $EE ACK/NACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.17 DESELECT Command [$cA]
The DESELECT command places a PICC in the Halt State. This command is used at the end of a transaction.
7.17.1 Operation
Sending the DESELECT command (with a matching CID) to a PICC in the Active State places the PICC in the Halt State.
The User Zone, password, and authentication registers are cleared before the PICC enters the Halt State. Only PICCs in
the Active State are permitted to answer this command.
7.17.2 Command Field Descriptions
CID: The Card ID assigned by the ATTRIB command.
CRC: Communication error detection bytes.
7.17.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
7.17.4 Error Handling
If a DESELECT command containing transmission errors is received by the PICC, it is ignored and no response is sent.
The PICC reports errors in the status byte of the response.
Table 7-40. Status Codes Returned in the DESELECT Response
7.17.5 Notes
The HLTB command is identical for 88SC and 88RF CryptoRF PICCs.
Reader PICC
Command > CID $A
CRC1
CRC2
Echo Command > CID $A
ACK
STATUS
CRC1
CRC2
Error/Status Message Status Code Type
No Errors $00 ACK
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.18 IDLE Command [$cB]
The IDLE command resets the PICC and places it in the Idle State. This command is used at the end of a transaction.
7.18.1 Operation
Sending the IDLE command (with a matching CID) to a PICC in the Active State resets the PICC and places it in the Idle
State. The User Zone, password, and authentication registers are cleared before the PICC enters the Idle State. The
PICC responds only to successful IDLE commands. Only PICCs in the Active State are permitted to answer this
command.
7.18.2 Command Field Descriptions
CID: The Card ID assigned by the ATTRIB command.
CRC: Communication error detection bytes.
7.18.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
7.18.4 Error Handling
If an IDLE command containing transmission errors is received by the PICC, it is ignored and no response is sent. The
PICC reports errors in the status byte of the response.
Table 7-41. Status Codes returned in the IDLE response
7.18.5 Notes
The HLTB command is identical for 88SC and 88RF CryptoRF PICCs.
Reader PICC
Command > CID $B
CRC1
CRC2
Echo Command > CID $B
ACK
STATUS
CRC1
CRC2
Error/Status Message Status Code Type
No errors $00 ACK
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7.19 Check Password Command [$cC]
The Check Password command transmits a password for validation.
7.19.1 Operation
To read or write data in User Zones that require a password for access the host must carry out a password validation
operation. To write data to the Configuration Memory during personalization the host must carry out a transport password
validation operation. The host uses the Check Password command to send the password for validation against the
password selected with the Password Index byte. Only PICCs in the Active State are permitted to answer this command.
If the Check Password is successful, the Password Attempts Counter (PAC) is cleared and the ACK response is issued.
Only one password is active at any time. If the Check Password fails, the PAC is incremented and a NACK response is
issued. The Check Password success or failure is memorized and active until the PICC is powered down, removed from
the Active state, or until a new Check Password is received. If the password trials limit is reached, subsequent Check
Password commands will be rejected.
If the Authentication Communication mode or the Encryption Communication mode is active, then the three PW bytes
are encryptedNakedn Normal Communication mode the PW bytes are not encrypted.
Reader PICC
Command > CID $C
Password Index
PW 1
PW 2
PW 3
CRC1
CRC2
Echo Command > CID $C
ACK/NACK
STATUS
CRC1
CRC2
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7.19.2 Command Field Descriptions
CID: The Card ID assigned by the ATTRIB command.
Password Index: Identifies the password register that the PICC will check the transmitted password against.
Table 7-42. Coding of the Password Index for 4-Kbit CryptoRF Devices
Table 7-43. Coding of the Password Index for 8-Kbit and Larger CryptoRF Devices
PW: The password bytes.
CRC: Communication error detection bytes.
Password Index Check Password
$10 Password Read 0
$11 Password Read 1
$12 Password Read 2
$17 Password Read 7
$00 Password Write 0
$01 Password Write 1
$02 Password Write 2
$07 Password Write 7
All Other Values Are Not Supported.
Password Index Check Password
$10 Password Read 0
$11 Password Read 1
$12 Password Read 2
$13 Password Read 3
$14 Password Read 4
$15 Password Read 5
$16 Password Read 6
$17 Password Read 7
$00 Password Read 0
$01 Password Write 1
$02 Password Write 2
$03 Password Write 3
$04 Password Write 4
$05 Password Write 5
$06 Password Write 6
$07 Password Write 7
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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7.19.3 Response Field Descriptions
CID: The PICC transmits its assigned card ID in the response.
ACK: Acknowledge, the command executed correctly.
NACK: Not Acknowledge, the command did not execute correctly.
STATUS: PICC status code.
CRC: Communication error detection bytes.
7.19.4 Error Handling
If a Check Password command containing transmission errors is received by the PICC, it is ignored and no response is
sent. The PICC reports errors in the status byte of the response.
Table 7-44. Status Codes Returned in the Check Password Response
7.19.5 Notes
The Check Password command is identical for 88SC and 88RF CryptoRF PICCs. Password indexes of $03 to $06, and
$13 to $16 will be NACKed by 88RF PICCs.
Error/Status Message Status Code Type
No errors $00 ACK
Password Index Invalid $A1 NACK
Check Password Failure $D9 NACK
Memory Access Error (Security Operation) $F9 NACK
Memory Access Error $EE ACK/NACK
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8. Transaction Flow
Figure 8-1. Flowchart of a Typical CryptoRF Transaction
In a typical CryptoRF transaction the host performs anticollision, selects a User Zone, and reads or writes the user
memory. When a User Zone requires a password, authentication, or encryption the host performs the required security
operation before accessing the User Zone.
Note: The Set User Zone command may be sent before or after the security operation.
Polling
(REQB/WUPB)
Select Card
(ATTRIB)
Halt
(HLTB)
Mutual Authentication
(Optional)
Encryption Activation
(Optional)
Anticollision Complete
Enter Authentication Mode
Enter Encryption Mode
Normal Mode
Set
User Zone
Deselect
or
Idle
Send
Checksum
Write
User
Memory
Read
Checksum
Read
User
Memory
Check
Password
Write
Configuration
Memory
Read
Configuration
Memory
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9. Absolute Maximum Ratings*
The maximum temperature ratings in this section are applicable to CryptoRF in wafer form. When assembled into a
package the CryptoRF temperature ratings may be reduced to reflect the limitations of the package; however, the
CryptoRF absolute maximum ratings should not be exceeded for any package.
10. Reliability
Table 10-1. Reliability
CryptoRF is fabricated with Atmel’s high reliability CMOS EEPROM manufacturing technology. The write endurance and
data retention EEPROM reliability ratings apply to each byte of the user and configuration memory.
The optional CryptoRF anti-tearing functions use a single anti-tearing EEPROM buffer memory. Every anti-tearing write
operation utilizes the same buffer. The anti-tearing write endurance specification is a limitation in the total number of
anti-tearing write operations that can be performed by each die.
Operating Temperature (Junction) . . .−25°C to +85°C
Storage Temperature (Ambient) . . . −65°C to + 150°C
HBM ESD (Antenna Pins only) . . . . . 2000V minimum
*Notice: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage to
the device. This is a stress rating only and functional
operation of the device at these or any other
condition beyond those indicated in the operational
sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect device reliability.
Parameter Min Typical Max Units
Write Endurance (each Byte) 100,000 Write Cycles
Anti-Tearing Write Endurance 50,000 Writes
Data Retention (at 55°C) 10 Years
Data Retention (At 35°C) 30 50 Years
Read Endurance Unlimited Read Cycles
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11. Electrical Characteristics
Table 11-1. Electrical Characteristics(1)
Notes: 1. Nominal values at 25C. Values are based on characterization and are not tested.
2. Tuning Capacitance limits are specified at 25C. CT temperature coefficient is < 100ppm/C.
11.1 Tamper Detection
CryptoRF contains tamper detection sensors to detect operation outside of specified limits. These sensors monitor the
internal supply voltage and clock frequency. An additional sensor detects high intensity light attacks. The die is disabled
and will not function when tampering is detected.
Symbol Parameter Min Nominal Max Units
CT(2) Integrated Tuning Capacitance 72 82 92 pF
TPOR Polling Reset Time (No Anti-Tearing To Process) 5 ms
TPOR-AT Polling Reset Time (Anti-Tearing Write To Process) 10 ms
TWR Write Cycle Time of EEPROM Memory 1.6 2.0 ms
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix A Terms and Abbreviations
Abbreviation Definition
88RF Second generation CryptoRF devices. Catalog Number Series: AT88RFxxC
88SC First generation CryptoRF devices. Catalog Number Series: AT88SCxxCRF
A Unmodulated PCD field amplitude. Used in modulation index calculation.
AAC Authentication Attempts Counter.
AACiAuthentication Attempts Counter with index i.
A/m Amperes per Meter. Units of magnetic field strength.
AC Alternating Current.
Access Control Registers in the Configuration Memory that are reserved for security configuration.
ACK Acknowledge response, indicates success of the requested operation.
Active state The state of a PICC that is selected and ready to receive commands.
ADDR Address identifying the location to begin a read or write operation.
AFI Application Family Identifier. Used during Type B anticollision.
AK Authentication Key. PR Register bits.
AM Authentication Mode. AR Register mode control bit.
Anticollision Registers in the Configuration Memory that are reserved for anticollision information.
APP Application bytes.
AR Access Register.
ASK Amplitude Shift Keying modulation. PCD data transmission signaling format.
AT Anti-tearing.
ATQB Answer to Request Type B. The response to a polling command.
ATTRIB PICC Selection Command, Type B.
Auth Authentication.
B Modulated PCD field amplitude. Used in modulation index calculation.
CAPost Authentication Cryptogram calculated by Host for comparison with CiA
Card A PICC with loop antenna in a plastic card or other RFID form factor.
ChAChallenge from Host (for Mutual Authentication).
ChEChallenge from Host (for Encryption Activation).
CH Challenge calculated by CryptoRF for Comparison with ChA or ChE
CiInitial Cryptogram with Index i, stored in CryptoRF.
CiACryptogram with Index i after Authentication, stored in CryptoRF.
CID Card ID. The 4 bit code used to identify a PICC in the Active state.
CiECryptogram with Index i after Encryption Activation, stored in CryptoRF.
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CMA The third of four security fuses on 88SC PICCs.
CMC Card Manufacturer Code. Register in Configuration Memory.
CRC Cyclic Redundancy Check = 16 bit RF Communication Error Detection Code.
CRC_B Cyclic Redundancy Check, Type B.
CRF CryptoRF
CryptoMemory A family of devices with CryptoRF security features and a TWI or ISO/IEC 7816 interface.
CryptoRF CryptoRF. Catalog Number Series: AT88SCxxCRF and AT88RFxxC.
CryptoRF Reader The Atmel ISO/IEC 14443 Type B reader IC. Catalog Number: AT88RF1354
Cryptography Registers in the Configuration Memory that are reserved for security information.
CT Tuning Capacitance. The capacitance between antenna pins AC1 and AC2.
D Variable for the Data bytes in a read or write Command.
DEVariable for the Encrypted Data Bytes in a read or write Command.
D(x) Variable for a particular Data byte, byte x.
DE(x) Variable for a particular Encrypted Data byte, byte x.
DATA Bytes for EEPROM memory read or write.
DCR Device Configuration Register. Address $18 in the Configuration Memory.
EEPROM Nonvolatile memory.
EGT Extra Guard Time.
EGTL Extra Guard Time Length. A DCR mode control bit.
ENC The second of four security fuses on 88RF PICCs.
EOF End of Frame.
ER Encryption Required. AR Register mode control bit.
ETA Extended Trials Allowed. A DCR mode control bit on 88SC PICCs.
ETU Elementary Time Unit = fc / 128 = 128 carrier cycles = 9.4395 uS nominal.
F1 A Function used by the Host for Authentication Key diversification.
F2 Any Function Performed Using the CryptoRF Cryptographic Engine.
FAB The second of four security fuses on 88SC PICCs.
fc Carrier Frequency = 13.56 MHz nominal.
Fo Resonant Frequency.
FO Frame Option.
Forbidden Registers in the Configuration Memory that cannot be written or read.
fs Subcarrier Frequency = fc/16 = 847.5 kHz nominal.
Fuse Byte The contents returned when reading the Security Fuses.
Abbreviation Definition
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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FWI Frame Waiting Time Integer. Protocol bits communicating the PICC FWT time.
FWT Frame Waiting Time. Maximum time the PCD must wait for a PICC response.
GiSecret Seed with index i, stored in CryptoRF.
Halt state The state of a PICC waiting for a WUPB command (ignoring all other commands).
HLTB Halt command, Type B.
Hmin Minimum unmodulated operating magnetic field strength.
Hmax Maximum unmodulated operating magnetic field strength.
Host The RF reader, firmware, and application software communicating with the PICC.
HWR Hardware Revision Register. [88RF PICCs]
i Variable for the Index of a Password Set or Key Set.
IC Integrated Circuit.
ID Identification.
Idle state The state of a PICC after power on reset, waiting for a REQB or WUPB command.
IEC International Electrotechnical Commission. www.iec.ch
ISO International Organization for Standardization. www.iso.org
J Loop Count Variable in a Flowchart.
K Secret Host Key. Diversified Keys are based on K.
KR Key Register.
kbps KiloBits Per Second.
kHz KiloHertz.
L Variable for the Length code in a CryptoRF read or write command. L = (N-1)
LSB Least Significant Bit.
MCommunication Security Mode. AR Register mode control bits.
MAC Message Authentication Code. Checksum.
MDF Modify Forbidden. AR Register mode control bit.
M.D. PCD Modulation Depth.
MHz MegaHertz.
M.I. PCD Modulation Index. Calculated from calibration coil voltages as (A – B)/(A + B).
mm Millimeter.
ms Millisecond.
s Microsecond
MSB Most Significant Bit.
MTZ Memory Test Zone. Address $0A and $0B in the Configuration Memory.
Abbreviation Definition
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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mV MilliVolt.
N Variable for the Number of anticollision slots.
N Variable for the Number of bytes in a read or write command. N = (L+1)
Nc A 7 byte register that can be used for key diversification.
NACK Not Acknowledge Response, Indicates failure of the requested operation.
NRZ-L Non-Return to Zero (L for Level) data encoding. PICC data transmission coding.
nS NanoSecond.
OTP One Time Programmable. Memory that cannot be erased or rewritten.
PAC Password Attempts Counter.
PARAM A byte containing option codes or variables.
PCD Proximity Coupling Device. The RF reader/writer and antenna.
PER The fourth of four security fuses.
Pgm Program.
PGO Program Only mode. AR Register mode control bit.
PICC Proximity Integrated Circuit Card. The card/tag containing the IC and antenna.
PK Primary Key. KR Register bits.
PM Password Mode. AR Register mode control bit.
POK Program Only Key. PR Register bits.
ppm Parts Per Million.
PR Password Register.
Protocol Bytes communicating ISO protocol information.
PUPI Pseudo Unique PICC Identifier. ID for anticollision.
PW Password.
PWEEncrypted Password.
QAHost Random Number generated by Host for Mutual Authentication.
QEHost Random Number generated by Host for Encryption Activation.
R Random number selected by PICC during anticollision.
RBmax Receive Buffer size code. ATQB protocol byte returned by PICC.
RCS Read Checksum. A DCR mode control bit on 88RF PICCs.
RF Radio Frequency.
RFU Reserved for Future Use. Any feature or bit reserved by ISO or by Atmel.
rms Root Mean Square.
ROK Read Only Key. KR Register bits.
Abbreviation Definition
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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ROM Read-Only Memory.
RW REQB/WUPB command selection code.
S Slot Number. A code sent to the PICC with Slot MARKER command.
SASession Key calculated by CMC during Mutual Authentication.
SiASession Key calculated by CryptoRF during Mutual Authentication.
SEC The first of four security fuses.
SKY The third of four security fuses on 88RF PICCs.
SME Supervisor Mode Enable. A DCR mode control bit.
STATUS A response byte containing information on the status of the PICC.
Tag A PICC with loop antenna attached; in one of several non-credit card form factors.
TBmax An ISO/IEC 14443-3 protocol code indicating the receive buffer size of the PCD.
TPOR Polling Response Time.
TPOR-AT Polling Response Time with Anti-Tearing.
TR0 Guard Time per ISO/IEC 14443-2.
TR1 Synchronization Time per ISO/IEC 14443-2.
TR2 PICC to PCD frame delay time (per ISO/IEC 14443-3 Amendment 1).
TWR EEPROM Write Cycle Time.
UAT Unlimited Authentication Trials. A DCR mode control bit.
UCR Unlimited Checksum Read. A DCR mode control bit on 88SC PICCs.
UDSN Unique Die Serial Number. Read-only register in the Configuration Memory
UZ User Zone.
WCS Write Checksum Timeout. A DCR mode control bit on 88RF PICCs.
WG8 ISO/IEC Working Group eight. Develops standards for contactless smartcards.
WLM Write Lock Mode. AR Register mode control bit on 88SC PICCs.
WUPB Wake Up command, Type B.
z Variable for the Index of a Password Set or Key Set.
Abbreviation Definition
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix B Standards and Reference Documents
B.1 International Standards
CryptoRF is designed to comply with the requirements of the following ISO/IEC standards for Type B PICCs operating at
the standard 106kbps data rate.
ISO/IEC 7810:1995 Identification Cards – Physical Characteristics
ISO/IEC 10373-6:2001 Identification Cards – Test Methods – Part 6: Proximity Cards
ISO/IEC 14443-1:2000 Identification Cards – Contactless Integrated Circuit(s) Cards – Proximity Cards – Part 1:
Physical Characteristics
ISO/IEC 14443-1:2008 Identification Cards – Contactless Integrated Circuit(s) Cards – Proximity Cards – Part 1:
Physical Characteristics
ISO/IEC 14443-2:2001 Identification Cards – Contactless Integrated Circuit(s) Cards – Proximity Cards – Part 2:
Radio Frequency Power and Signal Interface
ISO/IEC 14443-3:2001 Identification Cards – Contactless Integrated Circuit(s) Cards – Proximity Cards – Part 3:
Initialization and Anticollision
ISO/IEC standards are available a www.ansi.org, www.iso.org, and from your national standards organization. The
ISO/IEC 14443 and ISO/IEC 10373 standards were developed by the WG8 committee (www.wg8.de).
B.2 References
Atmel Application Note: Understanding the Requirements of ISO/IEC 14443 for Type B Proximity Contactless
Identification Cards. Document 2056 available at www.atmel.com.
CryptoRF Ordering Codes: CryptoRF and Secure RF Standard Product Offerings. Document 5047 available at
www.atmel.com.
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Appendix C User Memory Maps
CryptoRF User Memory is divided into equal size User Zones as summarized in Table C-1. Access requirements for
each zone are independently configured by the customer using the Access Control Registers. See Appendix H for
additional information on access control.
Table C-1. CryptoRF User Memory Characteristics
Note: 1. Memory maps in this section are for reference and are not intended to accurately illustrate the physical page
length of each User Memory configuration. The physical page length is equal to the maximum number of
bytes that can be written with a standard write command. The Write User Zone command will not write data
across page boundaries; each physical page must be written with a separate command.
Table C-2. Atmel AT88RF04C Memory Map for 4-Kbit User Memory
CryptoRF
Part Number
User Memory Size User Memory Organization Write Characteristics
Bits Bytes # Zones Bytes / Zone Standard Write Anti-Tearing
AT88RF04C 4K 512K 4 128 1 to 16 bytes 1 to 8 bytes
AT88SC0808CRF 8K 1K 8 128 1 to 16 bytes 1 to 8 bytes
AT88SC1616CRF 16K 2K 16 128 1 to 16 bytes 1 to 8 bytes
AT88SC3216CRF 32K 4K 16 256 1 to 32 bytes 1 to 8 bytes
AT88SC6416CRF 64K 8K 16 512 1 to 32 bytes 1 to 8 bytes
Zone $0 $1 $2 $3 $4 $5 $6 $7
User 0
$00
— 128 bytes
—
$78
User 1
$00
— 128 bytes
—
$78
User 2
$00
— 128 bytes
—
$78
User 3
$00
— 128 bytes
—
$78
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Table C-3. Atmel AT88SC0808CRF Memory Map for 8-Kbit User Memory
Zone $0 $1 $2 $3 $4 $5 $6 $7
User 0
$00
―128 bytes
$78
User 1
$00
―128 bytes
$78
User 2
$00
―128 bytes
$78
User 3
$00
―128 bytes
$78
User 4
$00
―128 bytes
$78
User 5
$00
―128 bytes
$78
User 6
$00
―128 bytes
$78
User 7
$00
―128 bytes
$78
Table C-4. Atmel AT88SC1616CRF Memory Map for 16-Kbit User Memory
Zone $0 $1 $2 $3 $4 $5 $6 $7
User 0
$00
―128 bytes
$78
User 1
$00
―128 bytes
$78
User 2
$00
―128 bytes
$78
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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User 3
$00
―128 bytes
$78
User 4
$00
―128 bytes
$78
User 5
$00
―128 bytes
$78
User 6
$00
―128 bytes
$78
User 7
$00
―128 bytes
$78
User 8
$00
―128 bytes
$78
User 9
$00
―128 bytes
$78
User 10
$00
―128 bytes
$78
User 11
$00
―128 bytes
$78
User 12
$00
―128 bytes
$78
User 13
$00
―128 bytes
$78
User 14
$00
―128 bytes
$78
User 15
$00
―128 bytes
$78
Table C-4. Atmel AT88SC1616CRF Memory Map for 16-Kbit User Memory (Continued)
Zone $0 $1 $2 $3 $4 $5 $6 $7
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Table C-5. Atmel AT88SC3216CRF Memory Map for 32-Kbit User Memory
Zone $0 $1 $2 $3 $4 $5 $6 $7
User 0
$00
―256 bytes
$F8
User 1
$00
―256 bytes
$F8
User 2
$00
―256 bytes
$F8
User 3
$00
―256 bytes
$F8
User 4
$00
―256 bytes
$F8
User 5
$00
―256 bytes
$F8
User 6
$00
―256 bytes
$F8
User 7
$00
―256 bytes
$F8
User 8
$00
―256 bytes
$F8
User 9
$00
―256 bytes
$F8
User 10
$00
―256 bytes
$F8
User 11
$00
―256 bytes
$F8
User 12
$00
―256 bytes
$F8
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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User 13
$00
―256 bytes
$F8
User 14
$00
―256 bytes
$F8
User 15
$00
―256 bytes
$F8
Table C-6. Atmel AT88SC6416CRF Memory Map for 64-Kbit User Memory
Zone $0 $1 $2 $3 $4 $5 $6 $7
User 0
$000
―512 bytes
$1F8
User 1
$000
―512 bytes
$1F8
User 2
$000
―512 bytes
$1F8
User 3
$000
―512 bytes
$1F8
User 4
$000
―512 bytes
$1F8
User 5
$000
―512 bytes
$1F8
User 6
$000
―512 bytes
$1F8
User 7
$000
―512 bytes
$1F8
Table C-5. Atmel AT88SC3216CRF Memory Map for 32-Kbit User Memory (Continued)
Zone $0 $1 $2 $3 $4 $5 $6 $7
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User 8
$000
―512 bytes
$1F8
User 9
$000
―512 bytes
$1F8
User 10
$000
―512 bytes
$1F8
User 11
$000
―512 bytes
$1F8
User 12
$000
―512 bytes
$1F8
User 13
$000
―512 bytes
$1F8
User 14
$000
―512 bytes
$1F8
User 15
$000
―512 bytes
$1F8
Table C-6. Atmel AT88SC6416CRF Memory Map for 64-Kbit User Memory (Continued)
Zone $0 $1 $2 $3 $4 $5 $6 $7
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix D Configuration Memory Maps
The Configuration Memory contains all of the system information used to configure the User Zones, plus 27 bytes of OTP
memory that the customer can use to store data of any kind. The data in the Configuration Memory is locked by
programming fuses during the personalization process so that the PICC configuration cannot be changed by the end
user.
Table D-1. CryptoRF Configuration Memory Characteristics
Access rights to the Configuration Memory are fixed in logic and are controlled by the security fuses. See Appendix G for
access control and fuse information. The Read System Zone and Write System Zone commands are used to access the
Configuration Memory.
The contents of the Configuration Memory registers affect the functionality of CryptoRF and should be changed from
their default configuration only after careful consideration. Incorrect or invalid settings can disable the device or prevent it
from communicating with the PCD.
Configuration Memory registers marked as Reserved or RFU must not be changed and cannot be used for customer
data. Only 27 bytes of OTP memory are available for general customer use on 88SC PICCs and 25 bytes of OTP
memory are available on 88RF PICCs, all other registers have assigned functionality. The OTP memory bytes available
for customer use are described in Appendix E
CryptoRF
Part Number
Password Sets Key Sets OTP Memory Transport Password
Sets Set Number Sets
Free for
Customer Use PW Index Password
AT88RF04C 4 0,1,2,7 4 25 bytes $07 $30 1D D2
AT88SC0808CRF 8 0,1,2,3,4,5,6,7 4 27 bytes $07 $40 7F AB
AT88SC1616CRF 8 0,1,2,3,4,5,6,7 4 27 bytes $07 $50 44 72
AT88SC3216CRF 8 0,1,2,3,4,5,6,7 4 27 bytes $07 $60 78 AF
AT88SC6416CRF 8 0,1,2,3,4,5,6,7 4 27 bytes $07 $70 BA 2E
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table D-2. Configuration Memory Map for Atmel AT88RF04C
$0 $1 $2 $3 $4 $5 $6 $7
$00 PUPI APP
Anticollision
$08 RBmax AFI MTZ CMC HWR
$10 Unique Die Serial Number Read only
$18 DCR Identification Number Nc
Access Control
$20 AR0 KR0 AR1 KR1 AR2 KR2 AR3 KR3
$28
Reserved$30
$38
$40
Issuer Code
$48
$50 AAC0Cryptogram C0
Cryptography
$58 Session Encryption Key S0
$60 AAC1Cryptogram C1
$68 Session Encryption Key S1
$70 AAC2Cryptogram C2
$78 Session Encryption Key S2
$80 AAC3Cryptogram C3
$88 Session Encryption Key S3
$90 Secret Seed G0
Secret
$98 Secret Seed G1
$A0 Secret Seed G2
$A8 Secret Seed G3
$B0 PAC Write 0 PAC Read 0
Password
$B8 PAC Write 1 PAC Read 1
$C0 PAC Write 2 PAC Read 2
$C8
Reserved
$D0
$D8
$E0
$E8 PAC Write 7 PAC Read 7
$F0
Reserved Forbidden
$F8
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table D-3. Configuration Memory Map for Atmel AT88SC0808CRF
$0 $1 $2 $3 $4 $5 $6 $7
$00 PUPI APP
Anticollision
$08 RBmax AFI MTZ CMC
$10 Unique Die Serial Number Read only
$18 DCR Identification Number Nc
Access Control
$20 AR0 PR0 AR1 PR1 AR2 PR2 AR3 PR3
$28 AR4 PR4 AR5 PR5 AR6 PR6 AR7 PR7
$30
Reserved
$38
$40
Issuer Code
$48
$50 AAC0Cryptogram C0
Cryptography
$58 Session Encryption Key S0
$60 AAC1Cryptogram C1
$68 Session Encryption Key S1
$70 AAC2Cryptogram C2
$78 Session Encryption Key S2
$80 AAC3Cryptogram C3
$88 Session Encryption Key S3
$90 Secret Seed G0
Secret
$98 Secret Seed G1
$A0 Secret Seed G2
$A8 Secret Seed G3
$B0 PAC Write 0 PAC Read 0
Password
$B8 PAC Write 1 PAC Read 1
$C0 PAC Write 2 PAC Read 2
$C8 PAC Write 3 PAC Read 3
$D0 PAC Write 4 PAC Read 4
$D8 PAC Write 5 PAC Read 5
$E0 PAC Write 6 PAC Read 6
$E8 PAC Write 7 PAC Read 7
$F0
Reserved Forbidden
$F8
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table D-4. Configuration Memory Map for Atmel AT88SC1616CRF, AT88SC3216CRF, and AT88SC6416CRF
$0 $1 $2 $3 $4 $5 $6 $7
$00 PUPI APP
Anticollision
$08 RBmax AFI MTZ CMC
$10 Unique Die Serial Number Read only
$18 DCR Identification Number Nc
Access Control
$20 AR0 PR0 AR1 PR1 AR2 PR2 AR3 PR3
$28 AR4 PR4 AR5 PR5 AR6 PR6 AR7 PR7
$30 AR8 PR8 AR9 PR9 AR10 PR10 AR11 PR11
$38 AR12 PR12 AR13 PR13 AR14 PR14 AR15 PR15
$40
Issuer Code
$48
$50 AAC0Cryptogram C0
Cryptography
$58 Session Encryption Key S0
$60 AAC1Cryptogram C1
$68 Session Encryption Key S1
$70 AAC2Cryptogram C2
$78 Session Encryption Key S2
$80 AAC3Cryptogram C3
$88 Session Encryption Key S3
$90 Secret Seed G0
Secret
$98 Secret Seed G1
$A0 Secret Seed G2
$A8 Secret Seed G3
$B0 PAC Write 0 PAC Read 0
Password
$B8 PAC Write 1 PAC Read 1
$C0 PAC Write 2 PAC Read 2
$C8 PAC Write 3 PAC Read 3
$D0 PAC Write 4 PAC Read 4
$D8 PAC Write 5 PAC Read 5
$E0 PAC Write 6 PAC Read 6
$E8 PAC Write 7 PAC Read 7
$F0
Reserved Forbidden
$F8
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix E Device Personalization
CryptoRF is delivered with the user memory filled with $FF data and with the security features disabled. Before issuing a
CryptoRF PICC to the end user, it is personalized with initial data and the security settings. The last step in the
personalization process is to program the security fuses.
Figure E-1. Personalization Process Flowchart
No
Yes
START
END
Select
User Zone
Write / Verify
User Data
Done
Initializing
User Memory
?
Check
Transport
Password
Write / Verify
Configuration
Memory
Program
Security
Fuses
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E.1 User Memory Initialization
The user memory is initialized by using the Set User Zone command to select a User Zone, and writing the initial data
with Write User Zone commands. The data is then verified with the Read User Zone commands. Each User Zone is
programmed in this manner.
E.2 Polling Response and OTP Memory Personalization
After initializing the user memory, the Configuration Memory is programmed with the polling response and OTP data.
Table H-3 shows the polling response registers in blue, OTP memory in green, and access control registers in gray. The
Unique Die Serial Number register is factory programmed and cannot be changed.
There are 27 bytes of OTP memory available for customer use in 88SC PICCs, and 25 bytes in 88RF PICCs; these
registers are shown in green in Table H-3 and Table H-4. See Appendix M for detailed information on configuration of the
polling response registers. See Appendix H for detailed information on configuration of the access control registers.
Figure E-2. System Zone Map for 88SC PICCs Showing the OTP and Polling Response Registers
Figure E-3. System Zone Map for 88RF PICCs Showing the OTP and Polling Response Registers
$0 $1 $2 $3 $4 $5 $6 $7
$00 PUPI APP
Anticollision
$08 RBmax AFI MTZ CMC
$10 Unique Die Serial Number Read Only
$18 DCR Identification Number Nc
Access Control
$20
Access Registers, Password Registers, and Reserved
$28
$30
$38
$40
Issuer Code
$48
$0 $1 $2 $3 $4 $5 $6 $7
$00 PUPI APP
Anticollision
$08 RBmax AFI MTZ CMC HWR
$10 Unique Die Serial Number Read Only
$18 DCR Identification Number Nc
Access Control
$20
Access Registers, Password Registers, and Reserved
$28
$30
$38
$40
Issuer Code
$48
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Memory Test Zone (MTZ)
The MTZ is a two byte register with open read/write access for testing basic functionality of the PICC. Data written in the
MTZ cannot be protected from being rewritten; this field should not be used for application data.
Card Manufacturer Code (CMC)
This 16-bit or 32-bit register, defined by the customer during personalization, is often used to store card manufacturer lot
codes. This OTP register may contain any value; it is an information field that does not affect functionality.
Hardware Revision (HWR) [88RF]
This 16-bit register is defined by Atmel. This code identifies the hardware type and design revision. This code cannot be
modified. The HWR code for 88RF PICCs is $C2XX where XX is the design revision code.
Unique Die Serial Number (UDSN)
This 64-bit register is defined by Atmel. This code contains a unique serial number for each die and manufacturing
traceability data. This code cannot be modified. [This register was previously named “Lot History Code”.]
Atmel reserves the right to modify the format of the contents of the UDSN register without notice; however, the UDSN
register value is guaranteed to be unique for each die.
Identification Number Nc
This 56-bit register, defined by the customer during personalization, is often used to store card ID numbers. This OTP
register may contain any value; it is an information field that does not affect functionality.
Issuer Code
The 128-bit Issuer Code register is defined by the customer during personalization. This OTP register may contain any
value; it is an information field that does not affect functionality.
E.3 Transport Password Check
The Transport Password must be presented using the Check Password command prior to writing the Configuration
Memory. The Transport Password for each CryptoRF device is shown in Table E-1. The Transport Password is the same
for every device with the same base part number, it is never changed.
Table E-1. CryptoRF Transport Passwords
CryptoRF
Part Number
Transport Password
PW Index Password
AT88RF04C $07 $30 1D D2
AT88SC0808CRF $07 $40 7F AB
AT88SC1616CRF $07 $50 44 72
AT88SC3216CRF $07 $60 78 AF
AT88SC6416CRF $07 $70 BA 2E
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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E.4 Security Fuse Programming
Three security fuses are programmed at the end of the personalization process to lock the PICC configuration. The Write
Fuse Byte option of the Write System Zone command is used to program the fuses. A fourth fuse, SEC, is already
programmed by Atmel before CryptoRF leaves the factory. The fuses can only be programmed in the specified order.
The security fuse programming sequence is as follows:
1. Send Write System Zone command with:
PARAM = $01, ADDR = $06, L = $00, DATA = $00 to program the FAB or ENC fuse.
2. Send Write System Zone command with:
PARAM = $01, ADDR = $04, L = $00, DATA = $00 to program the CMA or SKY fuse.
3. Send Write System Zone command with:
PARAM = $01, ADDR = $00, L = $00, DATA = $00 to program the PER fuse.
The response to each Write System Zone command should be ACK, and the fuse byte contents will be returned in the
STATUS byte. After all three fuses are programmed, the device configuration is locked and personalization is complete.
E.5 Secure Personalization
The 88RF PICCs support an optional encrypted personalization mode for programming the device secrets. The Secure
Personalization option is described in Appendix F This option is not available on 88SC PICCs.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix F Secure Personalization [88RF]
This appendix describes the optional Secure Personalization mode for 88RF PICCs. This mode allows the device secrets
to be written with data encryption, so that eavesdropping on the personalization process cannot compromise the device
secrets.
Figure F-1. Secure Personalization Process Flowchart
START
END
Personalize
User Zone
Check
Transport
Password
Program
ENC Security
Fuse
Activate
Encryption
Mode
Write / Verify
Configuration
Memory
Program
Security
Fuses
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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F.1 User Memory Initialization
The User Memory is initialized by using the Set User Zone command to select a User Zone, and writing the initial data
with Write User Zone commands. The data is automatically verified by the Automatic Data Write function as each Write
User Zone command is processed. The data can also be verified with Read User Zone commands. Each User Zone is
programmed in this manner.
F.2 Transport Password Check
The Transport Password must be presented using the Check Password command prior to writing the Configuration
Memory. The Transport Password for each 88RF device is shown in Table F-1. The Transport Password is the same for
every device with the same base part number; it is never changed by Atmel.
Table F-1. 88RF PICC Transport Passwords
F.3 Security Fuse Programming
The optional Secure Personalization mode is enabled and disabled by programming the security fuses. By default the
Secure Personalization mode is disabled. Programming the ENC fuse enables Secure Personalization mode.
Three security fuses are programmed during the personalization process to lock the PICC configuration. The Write Fuse
Byte option of the Write System Zone command is used to program the fuses. A fourth fuse, SEC, is already
programmed by Atmel before CryptoRF leaves the factory. The fuses can only be programmed in the specified order.
The security fuse programming sequence is as follows:
1. Send Write System Zone command with:
PARAM = $01, ADDR = $06, L = $00, DATA = $00 to program the ENC (Encryption) fuse. The Secure Personal-
ization mode is enabled by programming the ENC fuse.
2. Send Write System Zone command with:
PARAM = $01, ADDR = $04, L = $00, DATA = $00 to program the SKY (Secret Key) fuse. The secrets are locked
and the Secure Personalization mode is disabled by programming the SKY fuse.
3. Send Write System Zone command with:
PARAM = $01, ADDR = $00, L = $00, DATA = $00 to program the PER (Personalization) fuse. The Transport
Password is disabled by programming the PER fuse.
The response to each Write System Zone command should be ACK, and the fuse byte contents will be returned in the
STATUS byte. After all three fuses are programmed, the device configuration is locked and personalization is complete.
F.4 Secure Personalization Mode Data Encryption
When the optional Secure Personalization mode is enabled by programming the ENC fuse to 0b, then certain registers in
the configuration memory require communication encryption for read or write access. This is shown in Table F-2 below
using color codes. The contents of registers with green shading are never encrypted when reading or writing, regardless
of the communication security mode of the PICC. Access to registers with pink shading is forbidden; no read or write
access is allowed.
The registers shaded in blue contain device “secrets”, they cannot be written or read unless the Encryption
Communication Security mode has been activated (with any key set). The contents of these “secrets” registers is
encrypted when reading or writing. Use of the Write System Zone with Integrated MAC command is mandatory when
writing the “secrets” registers (see Section 7.10).
CryptoRF
Part Number
Transport Password
PW Index Password
AT88RF04C $07 $30 1D D2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table F-2. Configuration Memory Map Showing Data Encryption Requirements for Fuse State ENC = 0b, SKY = 1b.
Programming the SKY fuse locks the Secret Seeds and Session Encryption Key registers so that the contents cannot be
read or changed. Once locked, these registers cannot be unlocked. The SKY fuse also disables the Secure
Personalization mode and disables the Write System Zone with Integrated MAC command.
The Configuration Memory Access requirements for all four of the Security Fuse states is described in Appendix G
Note: It is not necessary to initialize the Session Encryption Key registers since any data contained in these registers
will be overwritten by the first Authentication Activation attempt.
$0 $1 $2 $3 $4 $5 $6 $7
$00 PUPI APP Anticollision
$08 RBmax AFI MTZ CMC HWR
$10 Unique Die Serial Number Read only
$18 DCR Identification Number Nc
Access Control
$20 AR0 KR0 AR1 KR1 AR2 KR2 AR3 KR3
$28
Reserved$30
$38
$40 Issuer Code
$48
$50 AAC0Cryptogram C0
Cryptography
$58 Session Encryption Key S0
$60 AAC1Cryptogram C1
$68 Session Encryption Key S1
$70 AAC2Cryptogram C2
$78 Session Encryption Key S2
$80 AAC3Cryptogram C3
$88 Session Encryption Key S3
$90 Secret Seed G0
Secret
$98 Secret Seed G1
$A0 Secret Seed G2
$A8 Secret Seed G3
$B0 PAC Write 0 PAC Read 0
Password
$B8 PAC Write 1 PAC Read 1
$C0 PAC Write 2 PAC Read 2
$C8
Reserved
$D0
$D8
$E0
$E8 PAC Write 7 PAC Read 7
$F0 Reserved Forbidden
$F8
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix G Security Fuses
There are four fuses which control access to the Configuration Memory. One fuse (SEC) is programmed by Atmel before
CryptoRF leaves the factory; the remaining three fuses are programmed during the personalization process. Once a fuse
is programmed, it can never be changed.
These fuses do not control access to the user memory; user memory access rights are defined in the Access Registers.
The security fuses are used to lock the state of the Access Registers, Passwords, Keys, and other configuration data
during the personalization process so that they cannot be changed after a card is issued.
G.1 Reading the Security Fuses
To read the fuses send the Read System Zone command with PARAM = $01, ADDR = $FF, L = $00. The CryptoRF
response will contain one data byte, the Fuse Byte. A value of 0b indicates the fuse has been programmed. Bits four to
seven of this byte are not used as security fuses and are reserved by Atmel.
Figure G-1. Definition of the DATA Byte received when reading the Fuse Byte of 88SC PICCs.
Figure G-2. Definition of the DATA Byte received when reading the Fuse Byte of 88RF PICCs.
G.2 Programming the Fuse Bits
Three security fuses are programmed at the end of the personalization process to lock the PICC configuration. The Write
Fuse Byte option of the Write System Zone command is used to program the fuses. A fourth fuse, SEC, is already
programmed by Atmel before CryptoRF leaves the factory. The fuses can only be programmed in the specified order.
The security fuse programming sequence is as follows:
1. Send Write System Zone command with:
PARAM = $01, ADDR = $06, L = $00, DATA = $00 to program the FAB or ENC fuse.
2. Send Write System Zone command with:
PARAM = $01, ADDR = $04, L = $00, DATA = $00 to program the CMA or SKY fuse.
3. Send Write System Zone command with:
PARAM = $01, ADDR = $00, L = $00, DATA = $00 to program the PER fuse.
The response to each Write System Zone command should be ACK, and the fuse byte contents will be returned in the
STATUS byte. After all three fuses are programmed, the device configuration is locked.
F7 F6 F5 F4 F3 F2 F1 F0
RFU RFU RFU RFU SEC PER CMA FAB
X X X X 0 1 1 1 Default Value
F7 F6 F5 F4 F3 F2 F1 F0
RFU RFU RFU RFU SEC ENC SKY PER
X X X X 0 1 1 1 Default Value
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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G.3 Configuration Memory Access Control
Table G-1 shows the Configuration Memory access conditions for each of the 88SC PICC security fuse settings. Table
G-2 shows the Configuration Memory access conditions for each of the 88RF PICC security fuse settings. The left
column contains the name of the register area in the Configuration Memory map. The next column indicates if that row
applies to Read System Zone commands or Write System Zone commands. The four columns to the right show the
security fuse states.
The default state of the fuses when CryptoRF leaves the factory is SEC = 0b and the remaining three fuses set to 1b. The
left fuse column in Table G-1 and Table G-2 show the access conditions for this default fuse state.
Table G-1. Configuration Memory Access control by Security Fuse State for 88SC PICCs.
Registers Operation
Fuse State
SEC = 0b
FAB = 1b
CMA = 1b
PER = 1b
SEC = 0b
FAB = 0b
CMA = 1b
PER = 1b
SEC = 0b
FAB = 0b
CMA = 0b
PER = 1b
SEC = 0b
FAB = 0b
CMA = 0b
PER = 0b
Anticollision
(Except MT2 and CMC)
Read Open Open Open Open
Write Transport PW Forbidden Forbidden Forbidden
Memory Test Zone
(MTZ)
Read
Open Open Open Open
Write
Card Manufacturer Code
(CMC)
Read Open Open Open Open
Write Transport PW Transport PW Forbidden Forbidden
Read Only
(Lot History Code)
Read Open Open Open Open
Write Forbidden Forbidden Forbidden Forbidden
Access Control
Read Open Open Open Open
Write Transport PW Transport PW Transport PW Forbidden
Cryptography
(Except Encryption Key S)
Read Open Open Open Open
Write Transport PW Transport PW Transport PW Forbidden
Encryption Keys
(S)
Read
Transport PW Transport PW Transport PW Forbidden
Write
Secret
Read
Transport PW Transport PW Transport PW Forbidden
Write
Passwords
Read
Transport PW Transport PW Transport PW Write PW
Write
Password Attempt
Counters
(PAC)
Read Open Open Open Open
Write Transport PW Transport PW Transport PW Write PW
Forbidden
Read
Forbidden Forbidden Forbidden Forbidden
Write
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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The register access conditions in Table G-1 and Table G-2 are color coded. Open access is indicated by green. No access
permitted is indicated by magenta. If access is restricted, then the field is yellow. Blue fields indicate that Encryption Activation
is required for access.
For registers with restricted access, the requirement to gain access is indicated by the text. The text “Transport PW”
indicates that if the Transport Password is validated using the Check Password command, then access is granted. The
text “Write PW” indicates that if the Write Password of a password set is validated using the Check Password command,
then access is granted to the PAC registers and password registers for that password set only.
Table G-2. Configuration Memory Access control by Security Fuse State for 88RF PICCs.
Registers Operation
Fuse State
SEC = 0b
ENC = 1b
SKY = 1b
PER = 1b
SEC = 0b
ENC = 0b
SKY = 1b
PER = 1b
SEC = 0b
ENC = 0b
SKY = 0b
PER = 1b
SEC = 0b
ENC = 0b
SKY = 0b
PER = 0b
Anticollision
(Except MTZ, HWR)
Read Open Open Open Open
Write Transport PW Transport PW Transport PW Forbidden
Memory Test Zone
(MTZ)
Read
Open Open Open Open
Write
Hardware Revision
(HWR)
Read Open Open Open Open
Write Forbidden Forbidden Forbidden Forbidden
Read Only
(Unique Die Serial Number)
Read Open Open Open Open
Write Forbidden Forbidden Forbidden Forbidden
Access Control
(Except Nc, DCR)
Read Open Open Open Open
Write Transport PW Transport PW Transport PW Forbidden
Nc and DCR
Read Open Open Open Open
Write Transport PW Transport PW Forbidden Forbidden
Cryptography
(Except Encryption Keys S)
Read Open Open Open Open
Write Transport PW Transport PW Forbidden Forbidden
Encryption Keys
(S)
Read
Transport PW Transport PW
+ Encryption Forbidden Forbidden
Write
Secret
Read
Transport PW Transport PW
+ Encryption Forbidden Forbidden
Write
Passwords
Read
Transport PW Transport PW
+ Encryption Transport PW Write PW
Write
Password Attempt
Counters
(PAC)
Read Open Open Open Open
Write Transport PW Transport PW Transport PW Write PW
Forbidden
Read
Forbidden Forbidden Forbidden Forbidden
Write
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix H Configuration of Password and Access Control Registers
There are two types of configuration registers in CryptoRF, User Zone access control registers, and Device Configuration
Registers. The User Zone Access Registers (AR) set the access requirements for a single User Zone. The Device
Configuration Register (DCR) selects optional behaviors for the PICC. Both types of registers are described in this
appendix.
H.1 User Zone Configuration Options
Access to each User Zone in the CryptoRF user memory is controlled by two registers in the Configuration Memory. The
Access Register controls the access conditions for the User Zone. The Password Register (PR) or Key Register (KR)
controls the password set assigned to the User Zone. The default setting for these registers sets the security requirement
to open access, no security features active, for all User Zones.
Each set of User Zone access control registers has a name matched to the User Zone name. For example for 88SC
PICCs, User Zone 1 is controlled by AR1 and PR1, User Zone 2 is controlled by AR2 and PR2. User Zone i is controlled
by ARi and PRi.
H.1.1 Access Registers (AR) [88SC]
There is one Access Register for each User Zone in the user memory. The default state of this register is $FF, which
disables all of the optional security features.
Figure H-1. Definition of the User Zone Access Registers for 88SC PICCs.
The Access Register definition for 88SC PICCs is shown in Figure H-1. Changes to the AR registers are effective
immediately.
PM: Password Mode selection bits.
The PM0 and PM1 bits control the password requirements for the User Zone as shown in Table H-1. By default, no
password is required for access to the User Zone. If PM = 10b, then write password verification is required for write
access; read access does not require any password. If PM = 01b or 00b, then write password verification is required for
read/write access and read password verification is required for read-only access. The password set assigned to the
zone is specified in the Password Register.
Table H-1. Coding of the Password Mode Bits of the Access Register
AM: Authentication Mode selection bits.
The three Communication Security Mode control bits: AM0, AM1, and ER control the communication security
requirements for the User Zone as shown in Table H-2. By default authentication and encryption communication security
are disabled. See Appendix J for information on the Authentication Communication Security modes.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PM1 PM0 AM1 AM0 ER WLM MDF PGO
1 1 1 1 1 1 1 1 Default Value
PM1 PM0 Access
1 1 No Password Required
1 0 Write Password Required
0 1
Read and Write Passwords Required
0 0
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ER: Encryption Mode selection bit.
The three Communication Security Mode control bits: AM0, AM1, and ER control the communication security
requirements for the User Zone as shown in Table H-2. By default authentication and encryption communication security
are disabled. See Appendix K for information on Encryption Communication Security.
Table H-2. Communication Security Mode Options for 88SC PICCs.
WLM: Write Lock Mode control.
By default, the Write Lock Mode is disabled. If WLM = 0b, then Write lock Mode is enabled, and the User Zone is
effectively divided into eight byte pages with the first byte of each page controlling write access to all eight bytes. Figure
H-2 shows an example of WLM on two contiguous eight byte pages.
Figure H-2. Example of Byte Level Access Control Using the Write Lock Mode
The first byte of each virtual eight byte page is called the Write Lock Byte. Each bit of the Write Lock Byte controls the
locked status of one byte in the page. Write access is forbidden to a byte if its associated lock bit is set to 0b. Bit seven
controls byte seven, bit six controls byte six, etc.
Note: 1. When WLM is enabled, Write User Zone commands are restricted to a length of one byte.
MDF: Modify Forbidden mode control.
By default, the Modify Forbidden mode is disabled. If MDF = 0b, then Modify Forbidden mode is enabled, and no write
access is allowed to the User Zone. The User Zone effectively becomes Read-Only Memory (ROM).
PGO: Program Only mode control.
By default, the Program Only mode is disabled. If PGO = 0b, then data within the User Zone may be changed from 1b to
0b, but never from 0b to 1b.
Note: When PGO is enabled, Write User Zone commands are restricted to a length of one byte.
AM1 AM0 ER Communication Security Mode Auth. Key (AK) Pgm-Only Key (POK)
0 0 0 Reserved For Future Use (Not Supported) N/A N/A
0 0 1 Dual Access Authentication Mode Read/Write Access Read / Program Access
0 1 0 Reserved For Future Use (Not Supported) N/A N/A
0 1 1 Authentication for Read / Write Read/Write Access N/A
1 0 0 Reserved For Future Use (Not Supported) N/A N/A
1 0 1 Authentication for Write Read/Write Access N/A
1 1 0 Encryption for Read / Write Read/Write Access N/A
1 1 1 No Authentication or Encryption Required N/A N/A
Page $0 $1 $2 $3 $4 $5 $6 $7 < Address
$00
11011001 b $xx $xx $xx $xx $xx $xx $xx < Data
Locked Locked Locked < Status
Page $8 $9 $A $B $C $D $E $F < Address
$08
10101010 b $xx $xx $xx $xx $xx $xx $xx < Data
Locked Locked Locked Locked < Status
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H.2 Access Registers (AR) [88RF]
There is one Access Register for each User Zone in the user memory. The default state of this register is $FF, which
disables all of the optional security features.
Figure H-3. Definition of the Access Register for User Zone 1 of 88RF PICCs
Figure H-4. Definition of the Access Register for User Zones 0, 2, and 3 of 88RF PICCs
The Access Register definition is shown in Figure H-3 and Figure H-4. Bit two is reserved for future use. Changes to the
AR registers are effective immediately.
PM: Password Mode selection bits.
The PM0 and PM1 bits control the password requirements for the User Zone as shown in Table H-3. By default, no
password is required for access to the User Zone. If PM = 10b, then write password verification is required for write
access; read access does not require any password. If PM = 01b or 00b, then write password verification is required for
read/write access and read password verification is required for read-only access. The password set assigned to the
zone is specified in the Key Register.
Table H-3. Coding of the Password Mode Bits of the Access Register
M: Communication Security Mode control.
The Access Register M bits determine the Communication Security mode requirements for the User Zone. By default,
M = 111b and no Authentication or Encryption Activation is required to access the user memory.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PM1 PM0 M2 M1 M0 RFU MDF PGO
1 1 1 1 1 1 1 1 Default Value
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PM1 PM0 M2 M1 M0 RFU MDF RFU
1 1 1 1 1 1 1 1 Default Value
PM1 PM0 Access
1 1 No Password Required
1 0 Write Password Required
0 1
Read and Write Passwords Required
0 0
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Table H-4. Communication Security Mode Options for 88RF PICCs
MDF: Modify Forbidden mode control.
By default, the Modify Forbidden mode is disabled. If MDF = 0b, then Modify Forbidden mode is enabled, and no write
access is allowed to the User Zone. The User Zone effectively becomes Read-Only Memory (ROM).
PGO: Program Only mode control.
By default, the Program Only mode is disabled. If PGO = 0b, then data within the User Zone may be changed from 1b to
0b, but never from 0b to 1b.
Note: PGO is only available in User Zone 1. If PGO is enabled, then the Write User Zone data verification function is
disabled when writing to User Zone 1 of 88RF PICCs. The PGO option is not available in User Zones 0, 2, and 3
of 88RF PICCs.
H.2.1 Password Registers (PR) [88SC]
There is one Password Register for each User Zone in the user memory. The default state of this register is $FF.
Figure H-5. Definition of the User Zone Password Registers on 88SC PICCs.
The Password Register bit definitions are shown in Figure H-5. Changes to the PR registers are effective immediately.
AK: Authentication Key Set selection bits.
The Authentication Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register bits determine the Communication Security mode. Any number of PR registers can point to the same
key set, allowing multiple User Zones to use the same key set.
Table H-5. Coding of the Authentication Key Set Select Bits for CryptoRF Communication Security
M2 M1 M0 Communication Security Mode Primary Key (PK) Read-Only Key (ROK)
0 0 0 Reserved For Future Use (Not Supported) N/A N/A
0 0 1 Reserved For Future Use (Not Supported) N/A N/A
0 1 0 Authentication for Read/Encryption for Write Read / Write Access Read Access
0 1 1 Authentication for Read/Write Read / Write Access Read Access
1 0 0 Encryption for Write Read / Write Access N/A
1 0 1 Authentication for Write Read / Write Access N/A
1 1 0 Encryption for Read/Write Read / Write Access Read Access
1 1 1 No Authentication or Encryption Required N/A N/A
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
AK1 AK0 POK1 POK0 RFU PW2 PW1 PW0
1 1 1 1 1 1 1 1 Default Value
AK1 AK0 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
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POK: Program-Only Key Set selection bits.
The Program-Only Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register bits determine the Communication Security mode. The POK bits are only used if Dual Access
Authentication mode has been selected. Any number of PR registers can point to the same key set, allowing multiple
User Zones to use the same key set.
Table H-6. Coding of the Program-Only Key Set Select Bits for CryptoRF Communication Security
PW: Password Set selection bits.
The Password Set selection bits control the password set assigned to a User Zone. Table H-7 shows the coding of these
register bits. Any number of PR registers can point to the same password set, allowing multiple User Zones to use the
same password set.
Table H-7. Coding of the Password Set Select Bits for the 8-Kbit and Larger CryptoRF Devices.
H.2.2 Key Registers (KR) [88RF]
There is one Key Register for each User Zone in the user memory. The default state of this register is $FF.
Figure H-6. Definition of the User Zone Key Registers for 88RF PICCs
The Key Register bit definitions are shown in Figure H-6. Changes to the KR registers are effective immediately.
POK1 POK0 Authentication Key
0 0 Secret Seed G0
0 1 Secret Seed G1
1 0 Secret Seed G2
1 1 Secret Seed G3
PW2 PW1 PW0 Password Set
0 0 0 0
0 0 1 1
0 1 0 2
0 1 1 3
1 0 0 4
1 0 1 5
1 1 0 6
1 1 1 7
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PK1 PK2 ROK1 ROK2 RFU PW2 PW1 PW0
1 1 1 1 1 1 1 1 Default Value
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PK: Primary Key Set selection bits.
The Primary Key Set selection bits control the key set assigned to a User Zone for communication security. The Access
Register M bits determine the Communication Security mode associated with the PK bits.
Table H-8. Coding of the Primary Key Set Select Bits for CryptoRF communication Security on 88RF PICCs
ROK: Read-Only Key Set selection bits.
The Read-Only Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register M bits determine the Communication Security mode associated with the ROK bits.
Table H-9. Coding of the Read-Only Key Set Select Bits for CryptoRF communication Security on 88RF PICCs
PW: Password Set selection bits.
The Password Set selection bits control the password set assigned to a User Zone. Table H-10 shows the coding of
these register bits. Any number of KR registers can point to the same password set, allowing multiple User Zones to use
the same password set.
Table H-10. Coding of the Password Set Select Bits on 88RF PICCs
H.3 Device Configuration Options
There are a few configuration options which affect the overall behavior of the CryptoRF PICC. These options are
contained in the Device Configuration Register (DCR).
PK1 PK2 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
ROK1 ROK2 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
PW2 PW1 PW0 Password Set
0 0 0 0
0 0 1 1
0 1 0 2
1 1 1 7
All Other Values Are Not Supported.
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H.3.1 Device Configuration Register (DCR)
There is one Device Configuration Register in each PICC. The default state of this register is $FF for 88SC PICCs and
$7C for 88RF PICCs.
Figure H-7. Definition of the Device Configuration Register for 88SC PICCs
Figure H-8. Definition of the Device Configuration Register for 88RF PICCs
The DCR register definition is shown in Figure H-7 and Figure H-8. Bits zero, one, and two are reserved for future use.
Changes to the DCR are effective at the next Power-On or anticollision sequence.
SME: Supervisor Mode Enable control.
By default, the Supervisor Mode is disabled on 88SC PICCs and enabled on 88RF PICCs. If SME = 0b, then Supervisor
Mode is enabled and Password Write 7 becomes the Supervisor Password. Successful verification of the Supervisor
Password grants read and write access to all passwords and Password Attempt Counters (PACs), allowing the
passwords to be changed and PACs to be reset.
UCR: Unlimited Checksum Read control. [88SC]
By default, the UCR is disabled. If UCR = 0b, then Unlimited Checksum Reads are enabled. This function is intended for
development use only, since it allows systematic attacks on the security. This function does not affect the Password
Attempts Counters (PACs).
UAT: Unlimited Authentication Trials control.
By default, the UAT is disabled. If UAT = 0b, then the Authentication Attempts Counters (AACs) are disabled for all key
sets. This function is intended for development use only, since it allows systematic attacks on the security. This function
does not affect the Password Attempts Counters (PACs).
ETA: Extended Trials Allowed control. [88SC]
By default, the Extended Trials Allowed option is disabled. If this option is enabled by setting ETA = 0b, then the
maximum number of authentication and password trials is increased to permit a maximum of eight attempts before a
password or key is locked. If ETA is disabled, then only four attempts are permitted.
EGTL: Extra Guard Time Length control.
By default, the Extra Guard Time Length option is disabled, which maximizes RF communication speed. This option
controls the Extra Guard Time (EGT) for all data transmitted by the PICC. The default setting of EGTL = 0b selects zero
ETUs of EGT. Setting EGTL = 1b selects two ETUs of EGT for all transmissions. The EGTL option does not affect EGT
requirements for data transmitted by the reader. See Appendix O for information about EGT.
WCS: Write Checksum Timeout control. [88RF]
By default, the WCS is enabled. In authentication and encryption communication security modes the correct checksum
must be provided within 77ms, or the write operation is aborted. Setting WCS = 1b disables the timeout function.
RCS: Read Checksum control. [88RF]
By default, the RCS is enabled which allows one Read Checksum operation without resetting the cryptographic engine.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
SME UCR UAT ETA EGTL RFU RFU RFU
1 1 1 1 1 1 1 1 Default Value
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
SME RFU UAT RFU EGTL RFU WCS RCS
1 1 1 1 1 1 1 1 Default Value
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Appendix I Using Password Security
CryptoRF contains security options that can be enabled by the customer at personalization. By default, no security is
enabled, allowing CryptoRF to operate as a simple RFID EEPROM memory. Enabling password security on a User Zone
restricts access to the data to users with knowledge of the password.
I.1 Communication Security
Communication between the PICC and reader operates in three security modes. The normal mode allows
communication of all types of data in the clear. Authentication mode encrypts only passwords. Encryption mode encrypts
both user data and passwords. The default communication mode is Normal mode.
Table I-1. CryptoRF Communication Security Options
Note: 1. 88RF PICCs support an encryption option for programming secrets. See Appendix F.
As shown in Table I-1, passwords sent by the Host to CryptoRF in Normal Communication Security mode are
communicated in the clear, without being encrypted. In the Authentication or Encryption Communication Security modes,
passwords are encrypted.
I.2 Transport Password
The Transport Password protects the Configuration Memory contents on all CryptoRF devices from accidental changes.
All CryptoRF devices are shipped from Atmel with a Transport Password stored in password register Write 7. No
changes to the Configuration Memory are permitted unless the Transport Password has been verified using the Check
Password command.
Table I-2. CryptoRF Family Password Characteristics and Transport Passwords
Communication Mode User Data System Data Passwords
Normal Clear Clear Clear
Authentication Clear Clear Encryption
Encryption Encryption Clear(1) Encryption
CryptoRF
Part Number
Password Sets Transport Password
Sets Set Number PW Index Password
AT88RF04C 4 0,1,2,7 $07 $30 1D D2
AT88SC0808CRF 8 0,1,2,3,4,5,6,7 $07 $40 7F AB
AT88SC1616CRF 8 0,1,2,3,4,5,6,7 $07 $50 44 72
AT88SC3216CRF 8 0,1,2,3,4,5,6,7 $07 $60 78 AF
AT88SC6416CRF 8 0,1,2,3,4,5,6,7 $07 $70 BA 2E
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I.3 The Password and PAC Registers
Each password set, along with its associated Password Attempt Counters, is stored in an eight byte segment in the
Password section of the Configuration Memory. Figure I-1 illustrates password set “z” in the Configuration Memory map.
The Write Password and Write Password PAC are stored in the lower four bytes, while the Read Password and Read
Password PAC are stored in the upper four bytes.
Figure I-1. Password Set Register Format
Each password register contains the three byte password that is compared with the three byte password that is sent for
verification with the Check Password command. The storage locations of the three password bytes is illustrated in the
bottom half of Figure I-1.
Table I-3. Password Attempt Counter Coding for the Default DCR Configuration of 88SC PICCs
Table I-4. Password Attempt Counter Coding for the Extended Trials Allowed DCR Configuration of 88SC PICCs
$0 $1 $2 $3 $4 $5 $6 $7
ADDR PAC PW Write z PAC PW Read z
PAC PW1 PW2 PW3 PAC PW1 PW2 PW3
PAC Register Description
$FF No Failed Attempts
$EE 1 Failed Attempt
$CC 2 Failed Attempts
$88 3 Failed Attempts
$00 4 Failed Attempts (LOCK)
All Other Values Are Not Supported.
PAC Register Description
$FF No Failed Attempts
$FE 1 Failed Attempt
$FC 2 Failed Attempts
$F8 3 Failed Attempts
$F0 4 Failed Attempts
$E0 5 Failed Attempts
$C0 6 Failed Attempts
$80 7 Failed Attempts
$00 8 Failed Attempts (LOCK)
All Other Values Are Not Supported.
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Table I-5. Password Attempt Counter Coding for 88RF PICCs
The Password Attempt Counters contain a value which indicates how many unsuccessful password verification attempts
have been made using the Password Index of the corresponding password. Table I-3, Table I-4, and Table I-5 show
coding of the PAC register. On 88SC PICCs, the DCR register bit ETA selects the number of password attempt that are
permitted; the default configuration allows four attempts, ETA = 0b allows eight attempts. On 88RF PICCs the maximum
number of attempts is fifteen. If the PAC reaches the maximum count, then the corresponding password is locked and all
subsequent Check Password commands will fail.
I.4 Password Security Options
Password security for a User Zone is enabled by programming the Access Register for the zone. A Password Set is
assigned to the User Zone by programming the Password Register for the zone. Configuration of the registers is
described in Appendix H.
Table I-6. Coding of the Password Mode Bits of the Access Register
PAC Register Description
$55 No Failed Attempts
$56 1 Failed Attempt
$59 2 Failed Attempts
$5A 3 Failed Attempts
$65 4 Failed Attempts
$66 5 Failed Attempts
$69 6 Failed Attempts
$6A 7 Failed Attempts
$95 8 Failed Attempts
$96 9 Failed Attempts
$99 10 Failed Attempts
$9A 11 Failed Attempts
$A5 12 Failed Attempts
$A6 13 Failed Attempts
$A9 14 Failed Attempts
$AA 15 Failed Attempts (LOCK)
All Other Values Are Not Supported.
PM1 PM0 Access
1 1 No Password Required.
1 0 Write Password Required.
0 1
Read and Write Passwords Required.
0 0
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Table I-6 shows the available password security options. The default setting of PM=11b disables password security. The
remaining two options enable password security for either writes only, or for both reads and writes.
If PM = 10b, then the Write Password is required to be verified before a Write User Zone command will be accepted.
Data reads are not restricted in this configuration.
If read and write password security is enabled by setting PM = 01b or PM = 00b, then verification of the Read Password
allows access to data with the Read User Zone command; however no write access is permitted. Verification of the Write
Password allows access to the data with either Read User Zone or Write User Zone commands.
I.5 Password Verification
A password is sent for verification using the Check Password command as shown in Figure I-2. The Password Index
identifies the Password Register that the password will be compared against. If the passwords match, then the PICC will
latch the verification status as PASS along with the Password Index in an internal register, write the PAC to show no
failed attempts, and return an ACK in the response.
The internal password security status register maintains its state until the PICC is reset or some other event causes them
to be changed. For example, sending another Check Password command will update these registers to reflect the
success or failure of the new password verification event.
Note: Only one password is active at any time, and only the status of the most recent password verification event is
stored in the PICC.
If multiple User Zones are assigned the same Password Set, then a single Check Password command will provide
access to all of these User Zones. Note that it does not matter if the Set User Zone command is sent before or after a
Check Password command. The currently selected User Zone is stored in a register that is independent of the password
security status register.
Figure I-2. Check Password Command and Response
Reader PICC
Command > CID $C
Password Index
PW 1
PW 2
PW 3
CRC1
CRC2
Echo Command > CID $C
ACK/NACK
STATUS
CRC1
CRC2
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If a Check Password command fails, then the PICC returns a NACK and a non-zero Status byte in the response. This
Status byte reports the reason for failure of the operation. See “Check Password Command [$cC]” on page 64 for a
description of the Status codes.
Table I-7. Check Password Command ACK/NACK Coding
A Check Password response NACK can be coded two different ways, depending on the reason for failure.
If failure of the Check Password command results in the Password Attempt Counter being incremented, then the NACK
byte will contain an embedded code indicating the number of failed attempts. This special NACK will contain one of the
following values: $11, $21, $31, $41, $51, $61, $71, $81 for 88SC PICCs. The upper nibble of the NACK byte is the
number of failed attempts (one to eight failures), while the lower nibble is the NACK code $1.
For 88RF PICCs this special NACK will contain one of the following values: $11, $21, $31, $41, $51, $61, $71, $81, $91,
$A1, $B1, $C1, $D1, $E1, $F1. The upper nibble of the NACK byte is the number of failed attempts (1 to 15 failures),
while the lower nibble is the NACK code $1.
If failure of the Check Password command does not results in the Password Attempt Counter being incremented, then
the NACK byte will contain $01.
I.6 Changing Passwords
To change a password after the personalization procedure is complete, and the card configuration has been locked by
programming the security fuses, it is necessary to successfully verify the Write Password of a password set using the
Check Password command. The Read Password and Write Password registers and PACs can then be written using a
Write System Zone command, and verified using the Read System Zone command.
If the PAC for the Write Password has reached the attempt count limit, then the Write Password will be locked, and it is
not possible to change the passwords or PACs in this set; however, if the optional Supervisor Mode has been enabled in
the DCR, then the Supervisor Password can be used to enable write access to the passwords unless the Supervisor
Password is also locked.
I.7 Supervisor Password
Supervisor Mode is an optional feature that can be enabled by programming SME = 0b in the DCR register. In Supervisor
Mode, a Supervisor Password is enabled that grants read and write access to all of the password sets and PACs.
Password Write 7 is the Supervisor Password if SME = 0b.
If the Supervisor Password is successfully verified, then it is possible to write any of the passwords and PACs. This
allows passwords to be easily changed in the field, and for PACs to be reset to $FF (no unsuccessful attempts) by writing
the registers using the Write System Zone command.
When a PICC is configured with SME = 0b, it is recommended that Password Set 7 be reserved for the Supervisor
Password. User Zones using password security should be configured to use other password sets. If a PICC is configured
in this manner, then it is unlikely that the PAC for Password Write 7 will accidentally become locked (due to too many
unsuccessful attempts). If the PAC for Password Write 7 is locked, then all subsequent attempts to verify the Supervisor
Password will fail.
Supervisor Mode changes the Configuration Memory access requirements for the Password section of the memory only.
Enabling Supervisor Mode does not change the access requirements for any other configuration registers.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Response Decode
0 0 0 0 0 0 0 0 ACK
0 0 0 0 0 0 0 1 NACK, See STATUS byte for PICC information.
Password Attempts Count 0 0 0 1 NACK, Check Password Attempt Failure.
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Appendix J Using Authentication Communication Security
CryptoRF contains security options that can be enabled by the customer at personalization. By default, no security is
enabled, allowing CryptoRF to operate as a simple RFID EEPROM memory. Enabling Authentication Communication
Security on a User Zone restricts access to the data to users with knowledge of the Authentication key.
J.1 Communication Security
Communication between the PICC and reader operates in three security modes. The Normal mode allows
communication of all types of data in the clear. Authentication Communication Security mode encrypts only passwords.
Encryption Communication Security mode encrypts both user data and passwords. The default communication mode is
Normal mode.
Table J-1. CryptoRF Communication Security Options
Note: 1. 88RF PICCs support an encryption option for programming secrets. See Appendix F.
Authentication Communication Security is activated by performing Mutual Authentication between the Host system and
the PICC using the Verify Crypto command. Once activated, the PICC will remain in Authentication mode until a security
error occurs, a new Verify Crypto command is received, RF power is removed, or a DESELECT command or IDLE
command is received.
J.2 Authentication Security Options [88SC]
Authentication Communication Security for a User Zone is enabled by programming the Access Register (AR) and
Password Register (PR) for the zone. The Communication Security Mode (M) bits [AM1, AM0, ER] of the Access
Register determine the Communication Security requirements for the User Zone. The Password Register determines
which Key Set(s) are used to access the User Zone. Configuration of the AR and PR registers is described in
Appendix H
Table J-2. Selecting Authentication using the Communication Security Mode bits of the Access Register.
Table J-2 shows the three 88SC PICC Authentication Communication Security options, plus the default setting. By
default M = 111b and no Authentication or Encryption Activation is required to access the user memory.
Communication Mode User Data System Data Passwords
Normal Clear Clear Clear
Authentication Clear Clear Encryption
Encryption Encryption Clear(1) Encryption
AM1 AM0 ER Communication Security Mode Auth. Key (AK) Pgm-Only Key (POK)
0 0 1 Dual Access Authentication Mode Read/Write Access Read/Program Access
0 1 1 Authentication for Read/Write Read/Write Access N/A
1 0 1 Authentication for Write Read/Write Access N/A
1 1 1 No Authentication or Encryption Required N/A N/A
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J.2.1 M = 001b Security — Dual Access Authentication Mode
When M = 001b Authentication is required for Read or Write access to the User Zone. If Authentication is performed with
the key identified in the POK bits of the Password Register, then Read and Program-Only access is granted to the User
Zone. In this state data may be changed from 1b to 0b, but never from 0b to 1b.
If Authentication is performed with the key identified in the AK bits of the Password Register, then full Read/Write access
is granted to the User Zone. A checksum is required for write operations.
J.2.2 M = 011b Security – Authentication for Read/Write
When M = 011b Authentication is required for Read or Write access to the User Zone. If Authentication is performed with
the key identified in the AK bits of the Password Register, then Read/Write access is granted to the User Zone. A
checksum is required for write operations.
J.2.3 M = 101b Security – Authentication for Write
When M = 101b Authentication is required for Write access to the User Zone. If Authentication is performed with the key
identified in the AK bits of the Password Register, then Read/Write access is granted to the User Zone. Read-Only
access does not require Authentication or Encryption Activation. A checksum is required for write operations.
J.3 Authentication Security Options [88RF]
Authentication Communication Security for a User Zone is enabled by programming the Access Register (AR) and Key
Register (KR) for the zone. The Communication Security Mode (M) bits of the Access Register determine the
Communication Security requirements for the User Zone. The Key Register determines which Key Set(s) are used to
access the User Zone. Configuration of the AR and KR registers is described in Appendix H.
Table J-3. Selecting Authentication Using the Communication Security Mode Bits of the Access Register
Table J-3 shows the three 88RF PICC Authentication Security options, plus the default setting. By default M = 111b and
no Authentication or Encryption Activation is required to access the user memory.
J.3.1 M = 010b Security - Authentication for Read / Encryption for Write
When M = 010b Authentication is required for Read access to the User Zone. Encryption Activation is required for Write
Access to the User Zone. If Authentication is performed with the key identified in the ROK bits of the Key Register, then
Read-Only access is granted to the User Zone. If Encryption Activation is performed with the key identified in the PK bits
of the Key Register, then Read/Write access is granted to the User Zone. A checksum is required for write operations.
The M = 010b mode is a new feature in 88RF PICCs. This mode is not available in 88SC devices.
M2 M1 M0 Communication Security Mode Primary Key (PK) Read-Only Key (ROK)
0 1 0 Authentication for Read/Encryption for Write Read/Write Access Read Access
0 1 1 Authentication for Read/Write Read/Write Access Read Access
1 0 1 Authentication for Write Read/Write Access N/A
1 1 1 No Authentication or Encryption Required N/A N/A
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J.3.2 M = 011b Security - Authentication for Read / Write
When M = 011b Authentication is required for Read or Write access to the User Zone. If Authentication is performed with
the key identified in the PK bits of the Key Register, then Read/Write access is granted to the User Zone. If
Authentication is performed with the key identified in the ROK bits of the Key Register, then Read-Only access is granted
to the User Zone. A checksum is required for write operations.
If the PK and ROK bits of the Key Register select the same Key Set, then the Read-Only function is effectively disabled.
Authenticating 88RF PICCs with the PK key results in behavior identical to 88SC devices. The Read-Only function is not
supported by 88SC devices.
J.3.3 M = 101b Security - Authentication for Write
When M = 101b Authentication is required for Write access to the User Zone. If Authentication is performed with the key
identified in the PK bits of the Key Register, then Read/Write access is granted to the User Zone. Read-Only access
does not require Authentication or Encryption Activation. A checksum is required for write operations.
88RF PICC behavior is identical to 88SC devices when M = 101b.
J.4 The Password Register [88SC]
The Password Registers are used to select the Key Sets for Authentication or Encryption Communication Security. Any
Key Set can be used with any User Zone by programming the Key Register for the User Zone with the appropriate AK
and POK values. One Key Set can be used with any number of User Zones.
Figure J-1. Definition of the User Zone Password Registers on 88SC PICCs
The Authentication Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register bits determine the Communication Security mode associated with the AK bits.
Table J-4. Coding of the Authentication Key Set Select Bits for CryptoRF Communication Security
The Program-Only Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register bits determine the Communication Security mode associated with the POK bits. The POK bits are only
used in Dual Access Authentication mode.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
AK1 AK0 POK1 POK0 RFU PW2 PW1 PW0
1 1 1 1 1 1 1 1 Default Value
AK1 AK0 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
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Table J-5. Coding of the Program-Only Key Set Select Bits for CryptoRF Communication Security
J.5 The Key Register [88RF]
The Key Registers are used to select the Key Sets for Authentication or Encryption Communication Security. Any Key
Set can be used with any User Zone by programming the Key Register for the User Zone with the appropriate PK and
ROK values. One Key Set can be used with any number of User Zones.
Figure J-2. Definition of the Key Registers on 88RF PICCs
The Primary Key Set selection bits control the key set assigned to a User Zone for communication security. The Access
Register M bits determine the Communication Security mode associated with the PK bits.
Table J-6. Coding of the Primary Key Set Select Bits
The Read-Only Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register M bits determine the Communication Security mode associated with the ROK bits. For some
Communication Security modes the ROK register bits are not used.
Table J-7. Coding of the Read-Only Key Set Select Bits
POK1 POK0 Authentication Key
0 0 Secret Seed G0
0 1 Secret Seed G1
1 0 Secret Seed G2
1 1 Secret Seed G3
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PK1 PK2 ROK1 ROK2 RFU PW2 PW1 PW0
1 1 1 1 1 1 1 1 Default Value
PK1 PK2 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
ROK1 ROK2 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
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J.6 Key Sets
CryptoRF has four Key Sets. Each Key Set is associated with four registers in the Configuration Memory. The
Authentication Key is stored in the Secret Seed Gi register. The Authentication Attempt Counter for Secret Seed Gi is
stored in the AACi register. The Cryptogram Ci register is used during Authentication Activation procedure to store the
response to the Host challenge. The Session Key Si register is used to store the Encryption Activation key.
Figure J-3. Partial Configuration Memory Map Showing the Key Set Registers
Figure J-3 shows the portion of the Configuration Memory that contains the Key Set registers. The registers shaded in
green can always be read, but cannot be written after personalization. The registers shaded in blue cannot be written or
read after personalization.
Note: All of the Security Fuses must be programmed during personalization for the device secrets to be secure.
Key Set i uses registers AACi, Ci, Gi, and Si. If AACi is locked, the Key Set i is permanently disabled and any User Zone
requiring Key Set i for Authentication or Encryption Activation will no longer be accessible.
J.6.1 Changing Keys
The Secret Seeds cannot be modified after the Security Fuses are programmed during personalization. The AAC
registers cannot be re-written after the Security Fuses are programmed either. This is true even if the SME option in the
DCR register is enabled.
$0 $1 $2 $3 $4 $5 $6 $7
$50 AAC0Cryptogram C0
Cryptography
$58 Session Encryption Key S0
$60 AAC1Cryptogram C1
$68 Session Encryption Key S1
$70 AAC2Cryptogram C2
$78 Session Encryption Key S2
$80 AAC3Cryptogram C3
$88 Session Encryption Key S3
$90 Secret Seed G0
Secret
$98 Secret Seed G1
$A0 Secret Seed G2
$A8 Secret Seed G3
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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J.7 AAC Registers
The Authentication Attempt Counters contain a value which indicates how many unsuccessful Authentication attempts
have been made using the Key Index of the corresponding Secret Seed. Table J-8, Table J-9 and Table J-10 shows
coding of the AAC register. If the AAC reaches the maximum count of four or eight on 88SC PICCs, then the
corresponding key set is locked and all subsequent Authentication attempts will fail. If the AAC reaches the maximum
count of 15 on 88RF PICCs, then the corresponding key set is locked and all subsequent Authentication attempts will fail.
If the AAC contents are corrupted, or are programmed with an undefined value, then the corresponding key set is locked
and all subsequent Authentication attempts will fail. The AAC registers can always be read using the Read System Zone
command.
Table J-8. Authentication Attempt Counter Coding for the Default Configuration of 88SC PICCs
Table J-9. Authentication Attempt Counter Coding for the Extended Trials Allowed Configuration of 88SC PICCs
AAC Register Description
$FF No Failed Attempts
$EE 1 Failed Attempt
$CC 2 Failed Attempts
$88 3 Failed Attempts
$00 4 Failed Attempts (LOCK)
All Other Values Are Not Supported.
AAC Register Description
$FF No Failed Attempts
$FE 1 Failed Attempt
$FC 2 Failed Attempts
$F8 3 Failed Attempts
$F0 4 Failed Attempts
$E0 5 Failed Attempts
$C0 6 Failed Attempts
$80 7 Failed Attempts
$00 8 Failed Attempts (LOCK)
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table J-10. Authentication Attempt Counter Coding for 88RF PICCs
J.8 Authentication Activation
Authentication Communication Security is activated using the following Mutual Authentication procedure.
1. The Host reads the PICC ID from Nc (or another equivalent memory location) and calculates the diversified key
matching the PICC Secret Seed G. G = F1(K, ID, x, y, z).
2. The Host reads AACi and Ci from card.
3. The Host generates a Random Number QA and calculates challenge CHA and other parameters with the
cryptographic engine: [CHA, CA, SA] = F2(G, C, QA).
4. The Host Sends Verify Crypto Command with Key Index $0i: Verify Crypto ($0i, QA, CHA).
5. The PICC calculates challenge CH and other parameters using QA from the host with the cryptographic engine:
[CH, CiA, SiA] = F2(Gi, Ci, QA).
6. The PICC compares the internally calculated challenge CH to the value received from the host. If CH = CHA then
the host is authenticated and the card writes the calculated values of CiA to the Ci register and SiA to the Si register.
The AACi is cleared, Authentication Communication Security mode is activated, and an ACK response is returned
to the host.
7. The Host reads the new AACi and CiA from Ci register of the PICC and compares it to the calculated CA from
Step 3. If CA = CiA then the card is authenticated. The Mutual Authentication procedure is complete.
The Secret Seed Gi value in the PICC never changes after it is locked at personalization. The AACi, and Ci registers are
written (by the PICC) each time a Verify Crypto command is received by the PICC. The Si register is written (by the
PICC) each time the Mutual Authentication procedure succeeds.
If the Host receives a NACK response from the PICC, then the Mutual Authentication procedure can be retried starting
with step 2.
Figure J-4 shows the Mutual Authentication procedure as a flowchart.
AAC Register Description
$55 No Failed Attempts
$56 1 Failed Attempt
$59 2 Failed Attempts
$5A 3 Failed Attempts
$65 4 Failed Attempts
$66 5 Failed Attempts
$69 6 Failed Attempts
$6A 7 Failed Attempts
$95 8 Failed Attempts
$96 9 Failed Attempts
$99 10 Failed Attempts
$9A 11 Failed Attempts
$A5 12 Failed Attempts
$A6 13 Failed Attempts
$A9 14 Failed Attempts
$AA 15 Failed Attempts (LOCK)
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Figure J-4. Mutual Authentication Procedure
START
Authentication
Authentication
Read Card
ID
(Nc field
or other ID)
Read
AACi and
Cryptogram Ci
Is AACi Max ?
YES
NO
Note: CryptoRF Card must
be in Active State before
Starting Authentication
Calculate
Diversified Key G
with K, ID, x, y, z
using F1 Function
Generate
Random
Number QACalculate
Challenge ChA,
Cryptogram CA
Session Key SA
with G, C, QA
using F2 Function
Secret Host
Key K
+
x,y,z (if reqd.)
Card
Auth Key Set
is Locked
END
(FAILURE)
Store CA
and
Session Key
SA
Store C =
AACi + Ci
Store
ID
Send Verify Crypto
Command with
QA and ChA
Receive Response
Is
Response
NACK
?
NO
YES
Read
AACi and
Cryptogram
Ci
A
Does Ci
A
Match
CA ?
NO
YES
Card is
Authenticated
Store
AACi + Ci
A
Card
Authentication
Failed
END
(FAILURE)
END
Authentication
Answer with
Nc
(or equivalent)
Answer with
AACi and
Cryptogram Ci
Calculate
Challenge CH,
Cryptogram Ci
A,
Session Key Si
A
with Ci, Gi, QA
using F2 Function
Receive
Verify Crypto
Command with
QA and ChA
Does
ChA match
CH ?
Store Ci
A
and
Session Key
Si
A
NO
YES
Return Data
Return Data
Read System Zone Command
Read System Zone Command
Increment
and Store
AACi
Send
ACK
Response
Send
NACK
Response
Answer with
AACi and
Cryptogram
Ci
A
Return Data
Read System Zone Command
HOST is
Authenticated
CryptoRF Card
Operations
Host System
Operations
Is AACi Max ?
NO
YES
Secret Seed
Gi
Cryptogram
Ci
i = Card Key Set Number
Verify Crypto Command
Response
Clear
AACi
Do you want
to retry ?
YES
NO
Is AACi
Cleared ?
YES
NO
Alternate Flow (if new "C" already stored)
Card enters
Authentication Mode
Host enters
Authentication Mode
Card is in
Normal Mode
Card enters
Normal Mode
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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J.8.1 Key Index
The Key Index byte of the Verify Crypto command selects the Key Set that the PICC uses to perform the Mutual
Authentication procedure.
Table J-11. Key Index coding for the Verify Crypto command for Mutual Authentication
J.9 Set User Zone and Checksums
The Mutual Authentication procedure can be performed before or after the Set User Zone command is sent. It is not
necessary to repeat the Mutual Authentication procedure when changing User Zones unless the new User Zone requires
a different Key Set. If Authentication Communication Security is activated and the application later selects a User Zone
that does not require Authentication, the PICC will remain in Authentication Communication Security mode and all of the
Authentication mode requirements will continue to apply.
When Authentication Communication Security is active the Host must supply a correct cryptographic checksum when
writing data to a User Zone. This is true even if the User Zone Access Register does not require Authentication for
access to the zone.
J.10 Passwords
When Authentication Communication Security is active Passwords are encrypted during communications. The Host is
required to encrypt the three password bytes when sending the Check Password command. The PICC encrypts any
password bytes that are accessed with the Read System Zone command. The Host is required to encrypt any password
bytes when sending the Write System Zone command.
J.11 Deactivating Authentication Communication Security
Once activated, the PICC will remain in Authentication Communication Security mode until a security error occurs, a new
Verify Crypto command is received, RF power is removed, or a DESELECT command or IDLE command is received.
In some applications it is necessary to deactivate Authentication Communication Security so that data can be written to a
User Zone that has open read/write access without the necessity of computing a cryptographic checksum. While there
are several possible ways to reset the cryptographic engine and exit the Authentication Communication Security mode, it
is recommended that the Send Checksum command be used for this purpose.
If the PICC receives a Send Checksum command containing an incorrect checksum, the PICC resets the cryptographic
engine, returns to Normal Communication mode, and returns a NACK response to the host. The AACi register is not
incremented by the PICC when a bad checksum is received, so there is no penalty for using Send Checksum to exit
Authentication mode.
Key Index Key
$00 Secret Seed G0
$01 Secret Seed G1
$02 Secret Seed G2
$03 Secret Seed G3
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Appendix K Using Encryption Communication Security
CryptoRF contains security options that can be enabled by the customer at personalization. By default no security is
enabled, allowing CryptoRF to operate as a simple RFID EEPROM memory. Enabling Encryption Communication
Security on a User Zone restricts access to the data to users with knowledge of the Authentication key.
K.1 Communication Security
Communication between the PICC and reader operates in three security modes. The Normal mode allows
communication of all types of data in the clear. Authentication Communication Security mode encrypts only passwords.
Encryption Communication Security mode encrypts both user data and passwords. The default communication mode is
Normal mode.
Table K-1. CryptoRF Communication Security Options
Note: 1. 88RF PICCs support an encryption option for programming secrets. See Appendix F.
Encryption Communication Security is activated by performing Mutual Authentication between the Host system and the
PICC using the Verify Crypto command, followed by the Encryption Activation procedure. Once activated, the PICC will
remain in Encryption mode until a security error occurs, a new Verify Crypto command is received, RF power is removed,
or a DESELECT command or IDLE command is received.
K.2 Encryption Security Options [88SC]
Encryption Communication Security for a User Zone is enabled by programming the Access Register (AR) and Password
Register (PR) for the zone. The Communication Security Mode (M) bits [AM1, AM0, ER] of the Access Register
determine the Communication Security requirements for the User Zone. The Password Register determines which Key
Set is used to access the User Zone. Configuration of the AR and PR registers is described in Appendix H.
Table K-2. Selecting Encryption Using the Communication Security Mode Bits of the Access Register
Table K-2 shows the one CryptoRF Encryption Communication Security option for 88SC PICCs, plus the default setting.
By default M = 111b, and no Authentication or Encryption Activation is required to access the user memory.
K.2.1 M = 110b Security – Encryption for Read/Write
When M = 110b, Encryption is required for Read or Write access to the User Zone. If Encryption Activation is performed
with the key identified in the AK bits of the Password Register, then Read/Write access is granted to the User Zone. A
checksum is required for write operations.
Communication Mode User Data System Data Passwords
Normal Clear Clear Clear
Authentication Clear Clear Encryption
Encryption Encryption Clear(1) Encryption
AM1 AM0 ER Communication Security Mode Auth. Key (AK) Pgm-Only Key (POK)
1 1 0 Encryption for Read / Write Read / Write Access N/A
1 1 1 No Authentication or Encryption Required N/A N/A
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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K.3 Encryption Security Options [88RF]
Encryption Communication Security for a User Zone is enabled by programming the Access Register (AR) and Key
Register (KR) for the zone. The Communication Security Mode (M) bits of the Access Register determine the
Communication Security requirements for the User Zone. The Key Register determines which Key Set(s) are used to
access the User Zone. Configuration of the AR and KR registers is described in Appendix H.
Table K-3. Selecting Encryption Using the Communication Security Mode Bits of the Access Register
Table K-3 shows the three Encryption Security options for 88RF PICCs, plus the default setting. By default M = 111b,
and no Authentication or Encryption Activation is required to access the user memory.
K.3.1 M = 010b Security - Authentication for Read / Encryption for Write
When M = 010b, Authentication is required for Read access to the User Zone. Encryption Activation is required for Write
Access to the User Zone. If Authentication is performed with the key identified in the ROK bits of the Key Register, then
Read-Only access is granted to the User Zone. If Encryption Activation is performed with the key identified in the PK bits
of the Key Register, then Read/Write access is granted to the User Zone. A checksum is required for write operations.
The M = 010b mode is a new feature in 88RF PICCs. This mode is not available in 88SC devices.
K.3.2 M = 100b Security - Encryption for Write
When M = 100b Encryption is required for Write access to the User Zone. If Encryption Activation is performed with the
key identified in the PK bits of the Key Register, then Read/Write access is granted to the User Zone. Read-Only access
does not require Authentication or Encryption Activation. A checksum is required for write operations.
The M = 100b mode is a new feature in 88RF PICCs. This mode is not available in 88SC devices.
K.3.3 M = 110b Security — Encryption for Read/Write
When M = 110b Encryption is required for Read or Write access to the User Zone. If Encryption Activation is performed
with the key identified in the PK bits of the Key Register, then Read/Write access is granted to the User Zone. If
Encryption Activation is performed with the key identified in the ROK bits of the Key Register, then Read-Only access is
granted to the User Zone. A checksum is required for write operations.
If the PK and ROK bits of the Key Register select the same Key Set, then the Read-Only function is effectively disabled.
Encryption Activation of 88RF PICCs with the PK key results in behavior identical to 88SC devices. The Read-Only
function is not supported by 88SC devices.
M2 M1 M0 Communication Security Mode Primary Key (PK) Read-Only Key (ROK)
0 1 0 Authentication for Read/Encryption for Write Read / Write Access Read Access
1 0 0 Encryption for Write Read / Write Access N/A
1 1 0 Encryption for Read / Write Read / Write Access Read Access
1 1 1 No Authentication or Encryption Required N/A N/A
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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K.4 The Password Register [88SC]
The Password Registers are used to select the Key Sets for Authentication or Encryption Communication Security on
88SC PICCs. Any Key Set can be used with any User Zone by programming the Password Register for the User Zone
with the appropriate AK and POK values. One Key Set can be used with any number of User Zones.
Figure K-1. Definition of the User Zone Password Registers on 88SC PICCs
The Authentication Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register bits determine the Communication Security mode associated with the AK bits.
Table K-4. Coding of the Authentication Key Set Select Bits for CryptoRF Communication Security
The Program-Only Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register bits determine the Communication Security mode associated with the POK bits. The POK bits are only
used in Dual Access Authentication mode.
Table K-5. Coding of the Program-Only Key Set Select Bits for CryptoRF Communication Security
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
AK1 AK0 POK1 POK0 RFU PW2 PW1 PW0
1 1 1 1 1 1 1 1 Default Value
AK1 AK0 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
POK1 POK0 Authentication Key
0 0 Secret Seed G0
0 1 Secret Seed G1
1 0 Secret Seed G2
1 1 Secret Seed G3
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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K.5 The Key Register [88RF]
The Key Registers are used to select the Key Sets for Authentication or Encryption Communication Security on 88RF
PICCs. Any Key Set can be used with any User Zone by programming the Key Register for the User Zone with the
appropriate PK and ROK values. One Key Set can be used with any number of User Zones.
Figure K-2. Definition of the Key Registers on 88RF PICCs
The Primary Key Set selection bits control the key set assigned to a User Zone for communication security. The Access
Register M bits determine the Communication Security mode associated with the PK bits.
Table K-6. Coding of the Primary Key Set Select Bits for CryptoRF Communication Security
The Read-Only Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register M bits determine the Communication Security mode associated with the ROK bits. For some
Communication Security modes the ROK register bits are not used.
Table K-7. Coding of the Read-Only Key Set Select Bits for CryptoRF Communication Security
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PK1 PK2 ROK1 ROK2 RFU PW2 PW1 PW0
1 1 1 1 1 1 1 1 Default Value
PK1 PK2 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
ROK1 ROK2 Authentication Key Encryption Key
0 0 Secret Seed G0Session Key S0
0 1 Secret Seed G1Session Key S1
1 0 Secret Seed G2Session Key S2
1 1 Secret Seed G3Session Key S3
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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K.6 Key Sets
CryptoRF has four Key Sets. Each Key Set is associated with four registers in the Configuration Memory. The
Authentication Key is stored in the Secret Seed Gi register. The Authentication Attempt Counter for Secret Seed Gi is
stored in the AACi register. The Cryptogram Ci register is used during Authentication Activation and Encryption Activation
procedures to store the response to the Host challenge. The Session Key Si register is used to store the Encryption
Activation key.
Figure K-3. Partial Configuration Memory Map Showing the Key Set Registers
Figure K-3 shows the portion of the Configuration Memory that contains the Key Set registers. The registers shaded in
green can always be read, but cannot be written after personalization. The registers shaded in blue cannot be written or
read after personalization.
Note: All of the Security Fuses must be programmed during personalization for the device secrets to be secure.
Key Set i uses registers AACi, Ci, Gi and Si. If AACi is locked, the Key Set i is permanently disabled and any User Zone
requiring Key Set i for Authentication or Encryption Activation will no longer be accessible.
K.6.1 Changing Keys
The Secret Seeds cannot be modified after the Security Fuses are programmed during personalization. The AAC
registers cannot be re-written after the Security Fuses are programmed either. This is true even if the SME option in the
DCR register is enabled.
$0 $1 $2 $3 $4 $5 $6 $7
$50 AAC0Cryptogram C0
Cryptography
$58 Session Encryption Key S0
$60 AAC1Cryptogram C1
$68 Session Encryption Key S1
$70 AAC2Cryptogram C2
$78 Session Encryption Key S2
$80 AAC3Cryptogram C3
$88 Session Encryption Key S3
$90 Secret Seed G0
Secret
$98 Secret Seed G1
$A0 Secret Seed G2
$A8 Secret Seed G3
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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K.7 AAC Registers
The Authentication Attempt Counters contain a value which indicates how many unsuccessful Authentication and
Encryption Activation attempts have been made using the Key Index of the corresponding Secret Seed and Session
Encryption Key. Table K-8, Table K-9, and Table J-10 show coding of the AAC register. If the AAC reaches the maximum
count of four or eight on 88SC PICCs, then the corresponding key set is locked and all subsequent Authentication
attempts will fail. If the AAC reaches the maximum count of 15 on 88RF PICCs, then the corresponding key set is locked
and all subsequent Authentication attempts will fail.
If the AAC contents are corrupted, or are programmed with an undefined value, then the corresponding key set is locked
and all subsequent Authentication attempts will fail. The AAC registers can always be read using the Read System Zone
command.
Table K-8. Authentication Attempt Counter Coding for the Default DCR Configuration on 88SC PICCs
Table K-9. Authentication Attempt Counter Coding for the Extended Trials Allowed DCR Configuration on
88SC PICCs
AAC Register Description
$FF No Failed Attempts
$EE 1 Failed Attempt
$CC 2 Failed Attempts
$88 3 Failed Attempts
$00 4 Failed Attempts (LOCK)
All Other Values Are Not Supported.
AAC Register Description
$FF No Failed Attempts
$FE 1 Failed Attempt
$FC 2 Failed Attempts
$F8 3 Failed Attempts
$F0 4 Failed Attempts
$E0 5 Failed Attempts
$C0 6 Failed Attempts
$80 7 Failed Attempts
$00 8 Failed Attempts (LOCK)
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table K-10. Authentication Attempt Counter Coding for 88RF PICCs
AAC Register Description
$55 No Failed Attempts
$56 1 Failed Attempt
$59 2 Failed Attempts
$5A 3 Failed Attempts
$65 4 Failed Attempts
$66 5 Failed Attempts
$69 6 Failed Attempts
$6A 7 Failed Attempts
$95 8 Failed Attempts
$96 9 Failed Attempts
$99 10 Failed Attempts
$9A 11 Failed Attempts
$A5 12 Failed Attempts
$A6 13 Failed Attempts
$A9 14 Failed Attempts
$AA 15 Failed Attempts (LOCK)
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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K.8 Encryption Activation
Authentication Activation must be performed prior to Encryption Activation. The Mutual Authentication is performed in
steps one thru seven, and Encryption Activation in steps eight thru eleven of the following procedure.
1. The Host reads the PICC ID from Nc (or another equivalent memory location) and calculates the diversified key
matching the PICC Secret Seed G. G = F1(K, ID, x, y, z).
2. The Host reads AACi and Ci from card.
3. The Host generates a Random Number QA and calculates challenge CHA and other parameters with the
cryptographic engine: [CHA, CA, SA] = F2(G, C, QA)
4. The Host Sends Verify Crypto Command with Key Index $0i: Verify Crypto ($0i, QA, CHA)
5. The PICC calculates challenge CH and other parameters using QA from the host with the cryptographic engine:
[CH, CiA, SiA] = F2(Gi, Ci, QA)
6. The PICC compares the internally calculated challenge CH to the value received from the host. If CH = CHA then
the host is authenticated and the card writes the calculated values of CiA to the Ci register and SiA to the Si
register. The AACi is cleared, Authentication Communication Security mode is activated, and an ACK response is
returned to the host.
7. The Host reads the new AACi and CiA from Ci register of the PICC and compares it to the calculated CA from
Step 3. If CA = CiA, then the card is authenticated. The Mutual Authentication procedure is complete.
8. The Host generates a Random Number QE and calculates challenge CHE and other parameters with the
cryptographic engine: [CHE, CE] = F2(SiA, CiA, QE).
9. The Host Sends Verify Crypto Command with Key Index $1i: Verify Crypto ($1i, QE, CHE).
10. The PICC calculates challenge CH and other parameters using QE from the host with the cryptographic engine:
[CH, CiE] = F2(SiA, CiA, QE).
11. The PICC compares the internally calculated challenge CH to the value received from the host. If CH = CHE, then
the host is authenticated and the card writes the calculated value of CiE to the Ci register. The AACi is cleared,
Encryption Communication Security mode is activated, and an ACK response is returned to the host.
The Secret Seed Gi value in the PICC never changes after it is locked at personalization. The AACi, and Ci registers are
written (by the PICC) each time a Verify Crypto command is received by the PICC. The Si register is written (by the
PICC) each time the Mutual Authentication procedure succeeds.
If the Host receives a NACK response from the PICC, then the Mutual Authentication procedure can be retried starting
with step 2.
Figure J-4 shows the Authentication Activation procedure as a flowchart. Figure K-4 shows the Encryption Activation
procedure as a flowchart.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Figure K-4. Encryption Activation Procedure
START
Encryption
Activation Note: CryptoRF Card must
be in Authentication Mode
before Starting
Encryption Activation
Generate
Random
Number Q
E
Calculate
Challenge Ch
E
,
Cryptogram C
E
,
S
E
(not used)
with S
A
, C
A
, Q
E
using F2 Function
Store
C
E
Send Verify Crypto
Command with
Q
E
and Ch
E
Receive Response
Is
Response
NACK
?
NO
YES
Read
AAC
i
Encryption
Activation
Complete
Encryption
Activation
Failed
END
(FAILURE)
END
Encryption
Activation
Calculate
Challenge CH,
Cryptogram C
i
E
,
S
i
E
(not used)
with S
i
A
, C
i
A
, Q
E
using F2 Function
Receive
Verify Crypto
Command with
Q
E
and Ch
E
Does
Ch
E
match
CH ?
Store C
i
E
NO
YES
Increment
and Store
AAC
i
Send
ACK
Response
Send
NACK
Response
Answer with
AAC
i
Return Data
Read System Zone Command
CryptoRF Card
Operations
Host System
Operations
Is AAC
i
Max ?
NO
YES
Session Key
S
i
A
Cryptogram
C
i
A
i = Card Key Set Number
(Same i as used for
Authentication)
Verify Crypto Command
Response
Clear
AAC
i
Do you want
to retry ?
YES
NO
Is AAC
i
Cleared ?
YES
NO
Card enters
Encryption Mode
Host enters
Encryption Mode
Card enters
Normal Mode
Session Key
S
A
Cryptogram
C
A
Is card in
Authentication
Mode ?
Is Key
Index Correct
?
YES
YES
NO
NO
Goto START
Authentication
NO
Response is ACK
Response is
Unknown
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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K.8.1 Key Index
The Key Index byte of the Verify Crypto command selects the Key Set that the PICC uses to perform the Mutual
Authentication and Encryption Activation procedure.
Table K-11. Key Index Coding for the Verify Crypto Command
K.9 Set User Zone and Checksums
The Mutual Authentication and Encryption Activation procedures can be performed before or after the Set User Zone
command is sent. It is not necessary to repeat the Mutual Authentication and Encryption Activation procedure when
changing User Zones unless the new User Zone requires a different Key Set. If Encryption Communication Security is
activated and the application later selects a User Zone that does not require Encryption, the PICC will remain in
Encryption Communication Security mode, User Zone data will be encrypted, and all of the Encryption mode
requirements will continue to apply.
When Encryption Communication Security is active the Host must supply a correct cryptographic checksum when writing
data to a User Zone. This is true even if the User Zone Access Register does not require Encryption for access to the
zone.
K.10 Passwords
When Encryption Communication Security is active Passwords are encrypted during communications. The Host is
required to encrypt the three password bytes when sending the Check Password command. The PICC encrypts any
password bytes that are accessed with the Read System Zone command. The Host is required to encrypt any password
bytes when sending the Write System Zone command.
K.11 Deactivating Encryption Communication Security
Once activated, the PICC will remain in Encryption Communication Security mode until a security error occurs, a new
Verify Crypto command is received, RF power is removed, or a DESELECT command or IDLE command is received.
In some applications, it is necessary to deactivate Encryption Communication Security so that data can be written to a
User Zone that has open read/write access without the necessity of computing a cryptographic checksum. While there
are several possible ways to reset the cryptographic engine and exit the Encryption Communication Security mode, it is
recommended that the Send Checksum command be used for this purpose.
If the PICC receives a Send Checksum command containing an incorrect checksum, the PICC resets the cryptographic
engine, returns to Normal Communication mode, and returns a NACK response to the host. The AACi register is not
incremented by the PICC when a bad checksum is received, so there is no penalty for using Send Checksum to exit
Authentication or Encryption mode.
Key Index Key
$00 Secret Seed G0
$01 Secret Seed G1
$02 Secret Seed G2
$03 Secret Seed G3
$10 Session Encryption Key S0
$11 Session Encryption Key S1
$12 Session Encryption Key S2
$13 Session Encryption Key S3
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix L Understanding Anti-Tearing
Anti-tearing is an optional feature that protects a write operation from being corrupted due to PICC power loss during the
write operation. This feature can be enabled as needed by the Host during a transaction, it is not controlled by any
configuration register.
L.1 Tearing Explained
A tearing attack on a Smartcard transaction involves quickly removing a card from the reader before a transaction has
been completed. The object of a tearing attack is to remove the card from the reader after the Host application has
granted access to a product, but before the cost of the product has been deducted from the value stored on the card.
Both contact and contactless Smartcard transactions may be attacked in this manner. A tearing attack often results in
corruption of a portion of the data stored in the Smartcard.
Tearing attacks can be prevented from succeeding by careful application software development; if access to a product is
not granted until after a Smartcard value debit has occurred, then the attacker cannot achieve his objective. However
data corruption can occur if any Smartcard transaction is interrupted due to power loss.
L.2 CryptoRF Anti-Tearing
CryptoRF is designed with an anti-tearing feature that prevents data corruption in the event a memory write operation is
interrupted. Activating the anti-tearing feature impacts both the transaction time and the memory write endurance of the
PICC, so it should be activated only for critical data write operations.
Figure L-1 illustrates how a CryptoRF PICC performs an anti-tearing write. A CryptoRF anti-tearing write is a four step
process. The data is written to a buffer EEPROM memory before being written to the final EEPROM memory location.
The EEPROM Anti-Tearing Flag indicates if an anti-tearing write is in progress, or is completed.
The Anti-Tearing Flag is checked each time the PICC is powered up. If the flag indicates a write was in progress, then the
Anti-Tearing Write will be completed before the PICC is allowed to accept any commands.
The memory address and data are written to a buffer EEPROM in Step 1, followed by writing the Anti-Tearing Flag in
Step 2. In Step 3 the data in the buffer EEPROM is written to the address sent with the write command (the final
EEPROM memory location). The Anti-Tearing flag is cleared in Step 4, and the ACK response is returned to the PCD.
If power is interrupted before Step 2 is completed, then the write operation fails; the EEPROM contents are unchanged,
and the Anti-Tearing Flag is not set to indicate an anti-tearing write is in progress. If power is interrupted after Step 2 is
complete, then the Anti-Tearing flag is set; when the PICC is next powered up, the anti-tearing write will be completed as
part of the POR process. If power is interrupted during Step 3 or 4, the Anti-Tearing Flag will be set and the write will be
completed on the next POR.
Table L.3 shows the consequences of a tearing attack occurring at each step during an anti-tearing write. The EEPROM
contents at the address being written will either remain unchanged, or will be written with the new data. The EEPROM is
not corrupted by power interruption during an anti-tearing write operation.
Table L-1. Consequences of a Tearing Event during an Anti-Tearing Write
Step Description Result if Power is interrupted Mid-Step
1 Write Buffer Memory Original EEPROM contents are unchanged.
2Write Anti-Tearing Flag Original EEPROM contents are unchanged.
3 Write Final Memory Anti-Tearing Write completes on POR.
4Clear Anti-Tearing Flag Anti-Tearing Write completes on POR.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Figure L-1. CryptoRF Anti-Tearing Write Process
START
Receive
Anti-Tearing
Write
Command
Transmit
NACK
Response
Write to
Anti-Tearing
Buffer
END
PICC
Power OK
?
YES
NO
Write
Anti-Tearing
Flag
Write Data to
Final EEPROM
Location
Clear
Anti-Tearing
Flag
Transmit
ACK
Response
END
1
STEP
2
STEP
3
STEP
4
STEP
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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L.3 Performance Impact of Anti-Tearing
Anti-tearing impacts the CryptoRF write transaction time in two ways:
First, the maximum length of a write command is limited to eight bytes when anti-tearing is active.
Second, the response time of a write command is increased by approximately four times due to additional
EEPROM memory writes which occur when anti-tearing is active.
If anti-tearing is used to write eight bytes of data, the net result is an increase in the transaction time of only 5ms. When
large amounts of data are written, the increase in transaction time is significant. Writing the entire 128 byte User Zone on
AT88RF04C takes 155ms with anti-tearing, but only 47ms without anti-tearing. Writing the entire 256 byte User Zone on
AT88SC3216CRF takes 292ms with anti-tearing, but only 54ms without anti-tearing.
Table L-2. CryptoRF Family Write Characteristics with Anti-Tearing
L.4 Reliability Impact of Anti-Tearing
Each byte of the CryptoRF EEPROM user memory and configuration memory is rated for 100k write cycles minimum.
The entire memory can be written at least 100,000 times without wearing out any of the EEPROM memory bits.
Table L-3. CryptoRF Family Write Endurance with Anti-Tearing
All anti-tearing write commands sent to a PICC are processed in a single buffer EEPROM memory before being written to
the final EEPROM memory location. As a result, the write endurance for anti-tearing writes is a per-unit specification, not
a per-byte specification. A minimum of 50,000 anti-tearing write commands can be processed without wearing out any of
the buffer EEPROM bits, or the EEPROM Anti-Tearing Flag bits.
CryptoRF
Part Number
Write Characteristics
Standard Write Anti-Tearing Write
AT88RF04C 1 to 16 bytes 1 to 8 bytes
AT88SC0808CRF 1 to 16 bytes 1 to 8 bytes
AT88SC1616CRF 1 to 16 bytes 1 to 8 bytes
AT88SC3216CRF 1 to 32 bytes 1 to 8 bytes
AT88SC6416CRF 1 to 32 bytes 1 to 8 bytes
Parameter Min Typical Max Units
Write Endurance (each Byte) 100,000 Write Cycles
Anti-Tearing Write Endurance 50,000 Writes
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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L.5 Activating Anti-Tearing
Anti-Tearing can be used for either User Zone or Configuration Memory writes on 88SC PICCs. Anti-Tearing is available
for User Zone writes only on 88RF PICCs. Activation of this optional feature is described in this section.
The Set User Zone command is used to activate the anti-tearing feature when writing the user memory. To turn anti-
tearing on, send a Set User Zone command with bit seven in the PARAM byte set to 1b. Any Write User Zone command
that is received following anti-tearing activation will automatically use the anti-tearing write process. To turn anti-tearing
off, send a Set User Zone command with bit seven in the PARAM byte set to 0b. All subsequent Write User Zone
commands will automatically use the normal write process.
Table L-4. Definition of the PARAM byte of the Set User Zone Command
When writing the Configuration Memory on 88SC PICCs, the anti-tearing function is controlled by the PARAM byte of the
Write System Zone command. Table L-2 shows the PARAM byte options. If the PARAM byte of the Write System Zone
command is $80, then the anti-tearing write process is used. If the PARAM byte of the Write System Zone command is
$00, then the normal write process is used.
Figure L-2. PARAM Byte Options for the Write System Zone Command for 88SC PICCs
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
AT 0 0 0 User Zone
Command PARAM ADDR “L” DATA
Write System Zone $00 Address # of bytes – 1 “L + 1” bytes
Write System Zone w A/T $80 Address # of bytes – 1 “L + 1” bytes
Write Fuse Byte $01 Fuse ADDR $00 1 byte
All Other Values Are Not Supported.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix M Personalization of the Anticollision Registers
There are several registers that define the polling response of CryptoRF, which are written during the personalization
process. The ISO/IEC 14443 Part 3 requirements must be considered when programming these registers. Incorrect
personalization of these registers may cause readers to reject cards or to become confused and unable to complete the
transaction. This appendix describes the requirements for programming the polling registers for operation with ISO/IEC
14443 compliant readers and systems.
M.1 Anticollision Procedure
The RF reader (PCD) searches for Type B cards by issuing REQB or WUPB polling commands. These commands
contain an AFI (Application Family Identifier) code to poll for only cards with a matching AFI code. Applications
supporting multiple cards may also poll using the Slot MARKER command. See Appendix N for a detailed description of
the anticollision procedures.
The answer to any of these polling commands is called the ATQB response. This response contains a card serial number
(PUPI), which is used to identify a specific card during the anticollision process, along with three protocol bytes. The
protocol bytes tell the PCD what communication capabilities and options the card supports, and are used by the reader to
configure itself for optimum communications with the card.
M.2 Anticollision Registers
The ATQB response of CryptoRF contains several values that are located in registers in the anticollision section of the
System Zone (see Figure M-1 and Figure M-2). The values stored in the following registers are used during anticollision:
PUPI, APP, RBmax, and AFI.
Figure M-1. Memory Map of Anticollision Registers in the System Zone of 88SC PICCs.
Figure M-2. Memory Map of Anticollision Registers in the System Zone of 88RF PICCs.
$0 $1 $2 $3 $4 $5 $6 $7
$00 PUPI APP
Anticollision
$08 RBmax AFI MTZ CMC
$0 $1 $2 $3 $4 $5 $6 $7
$00 PUPI APP
Anticollision
$08 RBmax AFI MTZ CMC HWR
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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The REQB/WUPB polling command and response are shown in Figure M-3 with color-coding which matches Figure M-1
and Appendix M-2. Nine bytes of the ATQB response are customer programmable on CryptoRF. In addition, the AFI
code used for selection of cards for a particular application during anticollision is also customer configured.
Figure M-3. CryptoRF Response to an REQB or WUPB polling command.
The definitions of the polling configuration registers in the System Zone are listed below along with any restrictions which
ISO/IEC 14443 Part 3 places on the register values.
PUPI: Pseudo Unique PICC Identifier
PUPI is a 32 bit serial number defined by the customer during personalization; the PUPI is usually unique. This code is
transmitted as part of the ATQB response during anticollision. PUPI may be set to any value.
APP: Application Data
APP is an additional 32 bits of information transmitted as part of the ATQB response. This field is defined by the
customer during personalization. The fourth byte is programmed by Atmel at the factory with a memory density code (see
Table M-1); this byte can be redefined by the card manufacturer if desired. APP may be set to any value.
Reader PICC
Command > $05
AFI
PARAM
CRC1
CRC2
ATQB Response > $50 SUCCESS RESPONSE
PUPI 0 System Zone Byte $00
PUPI 1 System Zone Byte $01
PUPI 2 System Zone Byte $02
PUPI 3 System Zone Byte $03
APP 0 System Zone Byte $04
APP1 System Zone Byte $05
APP 2 System Zone Byte $06
APP 3 System Zone Byte $07
Protocol 1 $00
Protocol 2 System Zone Byte $08
Protocol 3 $51
CRC1
CRC2
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table M-1. Default Value of APP 3 Byte. This Register Can Be Changed.
RBmax: Receive Buffer Max Code
This 8-bit register is transmitted as Protocol 2 byte of the ATQB response. This register is programmed by Atmel with the
receive buffer maximum frame size code. This field can be reprogrammed by the customer during personalization if
desired. The value of this protocol byte is restricted by ISO/IEC 14443 Part 3 to the values $00, $10, $20, $30, $40, $50,
$60, $70, or $80 only. Use of an unapproved value in this register is likely to cause PCDs to malfunction.
The Protocol 2 byte of the ATQB response is defined in ISO/IEC 14443 Part 3, Section 7.9. This byte contains the Part 4
compliance code in the lower four bits and the code for the maximum frame size supported by the card in the upper four
bits. CryptoRF must return a value of $0 in the Part 4 compliance bits to indicate the PICC does not support the optional
ISO/IEC 14443 Part 4 Active State protocol. The coding of the card maximum frame size bits is shown in Table M-2.
Table M-2. PICC Maximum Frame Size Codes Defined in ISO/IEC 14443 Part 3
The PCD will store the lower four bits of ATQB Protocol Byte 2 in a register and echo it back to a selected PICC in the
lower four bits of ATTRIB Parameter Byte 3. CryptoRF will not accept an ATTRIB command with a non-zero value in
Parameter Byte 3.
Note: Intelligent PCDs will reject invalid ATQB responses and will not send invalid ATTRIB commands.
Device Number Density Code
AT88RF04C $22
AT88SC0808CRF $33
AT88SC1616CRF $44
AT88SC3216CRF $54
AT88SC6416CRF $64
Bit 7 Bit 6 Bit 5 Bit 4 Max Frame
0 0 0 0 16 bytes
0 0 0 1 24 bytes
0 0 1 0 32 bytes
0 0 1 1 40 bytes
0 1 0 0 48 bytes
0 1 0 1 64 bytes
0 1 1 0 96 bytes
0 1 1 1 128 bytes
1 0 0 0 256 bytes
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Table M-3. Default Value of RBmax. This Register Should Not Be Changed.
AFI: Application Family Identifier
This eight bit register identifies the application family and subfamily. This field is defined by the card manufacturer and is
used during the anticollision process to determine which cards will respond to an REQB or WUPB polling command. This
value is expected to be a single fixed value for all cards used in a particular system.
The upper four bits are the application family and the lower four bits are the subfamily. The ISO/IEC 14443 Part 3 Type B
application family definitions are shown in Table M-4. The AFI register will accept any code; however, only family codes
of $0 to $F and subfamily codes of $1 to $F should be used. AFI Register values of $00, $10, $20, $30, $40, $50, $60,
$70, $80, $90, $A0, $B0, $C0, $D0, $E0, and $F0 are prohibited and may cause PCDs to malfunction. Values defined as
RFU are reserved for future definition by ISO and may not be supported by all readers. A card using an RFU value for the
AFI is not compliant with ISO/IEC 14443 Part 3.
Table M-4. Application Family Codes as Defined in ISO/IEC 14443 Part 3
Note: 1. “Y” = $1 to $5
Device Number RBmax Code
AT88RF04C $10
AT88SC0808CRF $10
AT88SC1616CRF $10
AT88SC3216CRF $30
AT88SC6416CRF $30
AFI High Bits AFI Low Bits Application Family Examples
$0 “Y” Proprietary
$1 “Y” Transport Mass Transit, Bus, Airline…
$2 “Y” Financial Banking, Retail, Electronic Purse…
$3 “Y” Identification Access Control…
$4 “Y” Telecom Telephony, GSM…
$5 “Y” Medical
$6 “Y” Multimedia Internet Services…
$7 “Y” Gaming
$8 “Y” Data Storage Portable Files…
$9 – $D “Y” RFU not currently defined by 14443-3
$E “Y” Travel Documents
(MRTD) Y=$1 Passport, Y=$2 Visa, Y=$3 to $F RFU
$F “Y” RFU not currently defined by 14443-3
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The PICC compares the AFI register with the AFI value received in the REQB or WUPB polling command using the
matching criteria defined in ISO/IEC 14443 Part 3. Table M-5 shows the AFI matching criteria.
Table M-5. AFI Matching Criteria for Polling Commands Received by the PICC
Notes: 1. “Y” = $1 to $F
2. “X” = $1 to $F
M.3 Summary
The CryptoRF anticollision registers provide customers with the capability to customize the response of a CryptoRF
PICC to the polling commands. This polling response is used by the PCD to perform anticollision and to determine the
communication capabilities of the PICC. Intelligent RF readers will reconfigure themselves based on the contents of the
protocol bytes in ATQB and may malfunction if invalid values are returned by the card. For this reason, the values of the
CryptoRF anticollision registers must be carefully selected using the guidelines in this appendix.
AFI
High Bits
AFI
Low Bits REQB/WUPB Polling produces a PICC response from:
$0 $0 All Families and Subfamilies
“X” $0 All Subfamilies of Family “X”
“X” “Y” Only Subfamily “Y” of Family “X”
$0 “Y” Proprietary Subfamily “Y” Only
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Appendix N Understanding Anticollision
This section of the specification and the flow chart in Figure N-1 describe the anticollision procedure for the CryptoRF
family. The command and response definitions are detailed in Section 6. “Anticollision Command Definitions” on page
12. For additional information on the anticollision command coding, see Section 7 of ISO/IEC 14443 Part 3 or the Atmel
Application Note, Understanding the Requirements of ISO/IEC 14443 for Type B Proximity Contactless Identification
Cards.
When the PICC enters the 13.56MHz RF field of the host reader (PCD), it performs a Power-On Reset (POR) and waits
silently for a valid Type B Polling command. The CryptoRF PICC processes the Anti-Tearing registers as part of the POR
process.
The PCD initiates the anticollision process by issuing an REQB or WUPB command. The WUPB command activates any
card (PICC) in the field with a matching AFI code. The REQB command performs the same function, but does not affect
a PICC in the Halt State. The REQB and WUPB commands contain an integer “N” indicating the number of Slots
assigned to the anticollision process.
If “N” = 1 then all PICCs (with a matching AFI) respond with the ATQB response. If “N” is greater than one, then the PICC
selects a random number “R” in the range of one to “N”; if “R” = 1 then the PICC responds with ATQB. If “R” is greater
than one, then the PICC waits for a Slot MARKER command where the slot number “S” is equal to “R”, then it responds
with ATQB. The PCD polls all of the slots to determine if any PICC is present in the field.
The ATQB response contains a PUPI card serial number which is used to direct commands to a specific PICC during the
anticollision process. When the PCD receives an ATQB response, it can respond with a matching HLTB command to
Halt the PICC, or it can respond with a matching ATTRIB command to assign a Card ID Number (CID) and place the
PICC in the Active State. Once placed in the Active State, the PICC is ready for transactions using the CryptoRF Active
State commands. A PICC in the Active State ignores all commands that do not contain a CID number which matches the
CID assigned by the ATTRIB command. A PICC in the Active State ignores all REQB, WUPB, Slot MARKER, ATTRIB,
and HLTB commands.
When the PCD receives an ATQB response with a CRC error, then a collision is assumed to have occurred. Typically,
the PCD will complete transactions with any other PICCs in the field, and then place them in the Halt State using a
DESELECT command. The PCD will then issue a new REQB command, causing each PICC in the field (with a matching
AFI) that has not been Halted to select a new random number “R”. This procedure resolves the conflict between the
previously colliding PICCs, allowing the PCD to communicate with them.
The anticollision process continues in this manner until all PICCs in the field have completed their transactions. Any
command received by the PICC with a CRC error is ignored.
Note: ISO/IEC 14443 Part 3 describes two anticollision options for Type B PICCs; the Timeslot option has been imple-
mented in the CryptoRF family.
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Figure N-1. Anticollision and State Transition Flow Chart
Power On Reset
Wait for REQB
or WUPB
AFI Match ?
Is N = 1?
Select Random
Number "R"
in Range 1 to "N"
Is R = 1?
Wait for
Slot Marker = "R"
Send ATQB
Response
Wait for ATTRIB or HLTB
with PUPI match
Receive CID
Assignment
Send Answer
to HLTB
ACTIVE
State
HALT
State
Wait for WUPB
NO
YES
NO
YES
YES
NO
REQB or WUPB
REQB or WUPB
ATTRIBHLTB
DESELECT
Matched
Slot Marker
Send Answer
to ATTRIB
Anticollision
Process
Anti-Tearing
Registers
IDLE
Process
Active
Command
Active
Command
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Appendix O The ISO/IEC 14443 Type B RF Signal Interface
O.1 RF Signal Interface
The CryptoRF communications interface is compliant with the ISO/IEC 14443 Part 2 and Part 3 requirements for Type B.
Type B signaling utilizes ten percent amplitude modulation of the RF field for communication from the reader to the card
with NRZ encoded data. Communication from card to reader utilizes BPSK load modulation of an 847.5khz subcarrier
with NRZ-L encoded data. The RF field is continuously on for Type B communications.
O.2 Data Format
Data communication between the card and reader is performed using an LSB first data format. Each byte of data is
transmitted with a 0b start bit and a 1b stop bit as shown in Figure O-1. The stop bit, start bit, and each data bit are each
one elementary time unit (ETU) in length (9.4395μs).
Each byte transmission consists of a Start bit, eight data bits (LSB first), and a Stop bit. Each byte may be separated from
the next byte by Extra Guard Time (EGT). The EGT may be zero or a fraction of an ETU. EGT cannot exceed 57μs for
data transmitted by the PCD. EGT for data transmitted by the CryptoRF PICC is programmed to either zero or two ETUs
using the EGTL bit of the Device Configuration Register (DCR). The position of each bit is measured relative to the falling
edge of the start bit.
Figure O-1. Byte transmission format requirements for type B communications.
Despite the fact that data transmissions occur LSB first, all of the commands, data, and CRC bytes in ISO/IEC 14443 and
in this specification are listed in the conventional manner, with MSB on the left and LSB on the right.
Start LSB MSB
One byte transmission is 10 ETUs long plus EGT
b0 b1 b2 b3 b4 b5 b6 b7
Stop EGT
All bit timing is measured from the falling edge of the Start bit.
Bit transitions should occur within (n - 0.125) ETU and (n + 0.125) ETU of the falling edge of start bit.
EGT is 0 to 57 uS for PCD transmissions.
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O.3 Frame Format
Data transmitted by the PCD or PICC is sent as frames. The frame consists of the Start Of Frame (SOF), several bytes of
information, and the End Of Frame (EOF). The SOF and EOF requirements are shown in Figure O-2.
Figure O-2. Start of Frame (SOF) and End of Frame (EOF) Format Requirements
O.4 Reader Data Transmission
The unmodulated 13.56MHz carrier signal amplitude which is transmitted when the reader is idle is defined as Logical 1,
while the modulated signal level is defined as Logical 0. A frame transmitted by the reader consists of SOF, several bytes
of data, a two byte CRC_B, and the EOF.
Figure O-3. Format of a Frame Transmitted by the Reader to the Card
Start b0 b1
Start of Frame
Total Start of Frame Length is 12 to 14 ETUs First ByteNo Modulation
10 to 11 ETUs of "0"s 2 to 3 ETUs "1"s
10 to 11 ETUs of "0"s
Last Byte
End of Frame
Total End of Frame Length is 10 to 11 ETUs
No Modulation ("1"s) Command, Data and CRC_B No Modulation ("1"s)
EOFData TransmissionSOF
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O.5 Card Data Transmission
The CryptoRF PICC waits silently for a command from the PCD after being activated by the RF field. After receiving a
valid command from the PCD, the PICC is allowed to turn on the subcarrier only if it intends to transmit a complete
response frame. The PICC response consists of TR1, SOF, several bytes of data followed by a two byte CRC_B, and the
EOF. The subcarrier is turned off no later than two ETUs after the EOF. Figure O-4 shows the PICC frame format.
When the subcarrier is turned on it remains unmodulated for a time period known as the Synchronization Time (TR1).
The phase of the subcarrier during TR1 defines a Logical 1 and permits the reader demodulator to lock on to the
subcarrier signal. The subcarrier remains on until after the EOF transmission is complete. The TR1 transmitted by
CryptoRF is 10 to 11 ETUs in duration for all responses.
Figure O-4. Format of a Frame Transmitted by the PICC to the Reader
O.6 Response Timing
After the PICC receives a command from the PCD, it is not permitted to transmit a subcarrier during the Guard Time
(TR0). The minimum Guard Time is eight ETUs for all command responses. The maximum Guard Time is defined by the
Frame Waiting Time (FWT), except for the ATQB response (response to REQB or Slot MARKER polling commands),
which has a maximum TR0 of 32 ETUs.
Figure O-5. ISO/IEC 14443 Response Timing Requirements for the Card
The FWT is the maximum time that a PICC requires to begin a response. The PICC transmits a parameter in the ATQB
response to the polling command that tells the reader the worst case FWT. Typical response times for the CryptoRF are
listed in Appendix Q See Appendix P for signal timing specifications.
The PCD is not permitted to modulate the RF field while waiting for a PICC to respond to a command. Modulation of the
RF field during a memory read or write operation may corrupt the operation or cause reset of the PICC.
Subcarrier On Transmit Data and CRC_B
TR1 End of Frame
Subcarrier OffSubcarrier Off
Data TransmissionStart of Frame
PCD (Reader) CRC EOF
TR0 TR1
PICC (Chip) Subcarrier ON Data
No modulation
Response
Unmodulated Carrier
Subcarrier OFF
SOF
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O.7 CRC Error Detection
A two byte CRC_B is required in each frame transmitted by the PICC or PCD to permit transmission error detection. The
CRC_B is calculated on all of the command and data bytes in the frame. For encrypted data the encryption is performed
prior to CRC_B calculation. The SOF, EOF, Start bits, Stop bits, and EGT are not included in the CRC_B calculation. The
two byte CRC_B follows the data bytes in the frame.
Figure O-6. Location of the Two CRC_B Bytes Within a Frame
The CRC_B polynomial is defined in ISO/IEC 14443 and ISO/IEC 13239 as x16 + x12 + x5 + x0. This is a hex polynomial
of $1021. The initial value of the register used for the CRC_B calculation is all ones ($FFFF). When receiving information
from the reader, the PICC computes the CRC on the incoming command, data, and CRC bytes. After the last bit has
been processed the CRC register should contain $0000.
In the example illustrated in Figure O-6, the CRC_B is calculated on the “K” bytes of data and then appended to the data.
CRC1 is the least significant byte, and CRC2 is the most significant byte of the CRC_B. If the CRC_B was calculated as
$5A6B, then CRC1 is $6B and CRC2 is $5A.
O.8 Type A Tolerance
The RF Interface is designed for use in multi-protocol applications. It will not latch or lock up if exposed to Type A signals
and will not respond to them. The PICC may reset in the presence of Type A field modulation, but is not damaged by
exposure to Type A signals.
In a typical multi-protocol application the reader will poll for Type B cards and complete all transactions with any Type B
cards present in the field. The reader will then poll for Type A cards and complete all transactions with them. The reader
alternates between the two types of modulation and protocols.
SOF K Data Bytes CRC1 CRC2 EOF
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Appendix P RF Specifications and Characteristics
The ISO/IEC 10373-6 Test Methods standard contains the test requirements for characterizing ISO/IEC 14443 devices.
ISO/IEC 10373-6 utilizes PICCs in the ID-1 credit card size format for all tests. These test methods and the RF signal
interface requirements of ISO/IEC 14443 contain PICC and PCD performance requirements that are dependent on the
physical size of the PICC antenna.
The ISO/IEC 14443 set of standards do not differentiate PCD and PICC requirements that are PICC antenna size
dependent from those that are not. In this Appendix all of the RF requirements are summarized, and antenna size related
parameters are identified.
P.1 Electrical Characteristics
ISO/IEC 14443 devices, including the CryptoRF family, have their performance specified in terms of the RF interface of
the PICC and/or the PCD (Reader). Both components of the RF interface must perform within the specified limits for
communications to occur. An ISO/IEC 14443 PICC is not expected to operate with PCDs operating outside the
specifications.
P.1.1 AC Characteristics
Table P-1. CryptoRF PICC Characteristics [Not PICC Antenna Size Dependent](1)
Note: 1. Nominal values at 25°C. Values are based on characterization and are not tested.
The RF Interface characteristics of the CryptoRF family are listed in Table Q-1. Compliance with these specifications has
been verified by characterization of PICCs with ID-1 size antennas, but these items are not antenna size dependent. The
parameters in Table Q-1 are guaranteed by design. Appendix O contains illustrations of the RF interface timing
parameters.
Symbol Parameter Min Nominal Max Units ISO/IEC Spec.
fs Load Modulation Subcarrier Frequency (fc/16) 847.06 847.50 847.94 kHz 14443-2 9.2.3
BPSK Load Modulation Phase Shift 180 Degrees 14443-2 9.2.5
ETU Elementary Time Unit = Bit Time (fc/128) 9.4346 9.4395 9.4444 μs 14443-2 9.2.1
EGT Extra Guard Time (PICC to PCD Communication) 0 2 ETU 14443-3 7.1.2
ATQB TR0 Guard Time (ATQB Response Only) 8 10 ETU 14443-3 7.1.6
TR0 Guard Time (All Other Command Responses) 8 880 ETU 14443-3 7.1.6
TR1 Synchronization Time 10 11 ETU 14443-3 7.1.6
TPOR Polling Reset Time (No Anti-Tearing to Process) 5 ms 14443-3 5
TPOR-AT Polling Reset Time (Anti-Tearing Write to Process) 10 ms
TWR Write Cycle Time of EEPROM Memory 1.6 2.0 ms
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P.2 Reader Requirements
Table P-2. ISO/IEC 14443 Reader Requirements [Not PICC Antenna Size Dependent](1)
Note: 1. Nominal values at 25° C.
The CryptoRF family has been designed to operate with an ISO/IEC 14443 Type B compliant PCDs meeting the
requirements listed in Table P-2. CryptoRF has been characterized using PICCs with ID-1 size antennas and ISO/IEC
14443 Type B compliant readers with appropriately sized PCD antennas. The PCD characteristics in Table P-2 are not
PICC antenna size dependent.
P.3 PICC Antenna Size Dependent Specifications
Table P-3. Antenna Size Dependent Characteristics [ID-1 PICC Antennas Only](1)
Note: 1. Nominal values at 25°C. Values are based on characterization and are not tested.
The specifications in Table Q-3 apply to ISO/IEC 14443 PICCs using an ID-1 size antenna only. CryptoRF has been
characterized using ID-1 antennas and operates within these limits.
The magnetic field limits of ISO/IEC 14443 are measured using a calibration coil defined in ISO/IEC 10373-6 Section 6.1.
This calibration coil integrates the field strength over the 3000mm2 area of a typical ID-1 antenna. The Hmin and Hmax
limits of 1.5A/m rms and 7.5A/m rms define the expected operating volume of a PCD with an ID-1 size PICC. The PCD is
not allowed to generate a magnetic field strength exceeding 7.5A/m rms. An ID-1 PICC is required to survive continuous
exposure to a 10A/m rms magnetic field without damage; this non-operating specification guarantees a robust PICC RF
interface circuit.
The Load Modulation Amplitude is measured over the full operating magnetic field strength range using an apparatus
defined in ISO/IEC 10373-6 Section 7.1. This apparatus uses sense coils to detect the signal generated by a PICC
transmitting a message to the PCD. The sense coils are optimized to detect a signal generated by an ID-1 PICC. The
ISO/IEC 14443 Load Modulation Amplitude requirements apply to this test apparatus only.
Symbol Parameter Min Nominal Max Units
ISO/IEC
Spec.
fc Carrier Frequency 13.553 13.560 13.567 MHz 14443-2 6.1
M.I. Field Modulation Index (PCD to PICC Communication) 8 11 14 percent 14443-2 9.1.2
M.D. Field Modulation Depth (PCD to PICC Communication) 85.2 80.2 75.4 percent
ETU Elementary Time Unit = Bit Time (fc /128) 9.4346 9.4395 9.4444 μs 14443-2 9.1.1
EGT Extra Guard Time (PCD to PICC Communication) 0 57 μs 14443-3 7.1.2
TR2 Frame Delay Time
(PICC EOF Falling Edge to PCD SOF Falling Edge) 14 ETU 14443-3 7.1.7
Symbol Parameter Min Nominal Max Units ISO/IEC Spec.
H Unmodulated Operating Magnetic Field 1.5 7.5 A/m rms 14443-2 6.2
Maximum Magnetic Field Exposure (Non-operating) 10 A/m rms 14443-1 4.3.5
Load Modulation Amplitude at Hmin (1.5A/m rms) 18.45 mV
peak 14443-2 9.2.2
(test per 10373-6)
Load Modulation Amplitude at Hmin (7.5A/m rms) 2.68 mV
peak
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P.4 Specifications for Other Antenna Sizes
The specifications in Table Q-3 cannot be applied directly to PICCs with larger or smaller antennas. The characteristics
in Table P-1 and Table P-2 are applicable to a PICC with any antenna dimensions.
Load Modulation Amplitude measurements on larger or smaller PICCs would require the design and characterization of a
new test apparatus. These measurement results would be dependent on the apparatus and cannot be extrapolated from
the existing ISO/IEC 14443 specifications.
A reasonable estimate of the operating magnetic field range for a PICC can be made for any PICC antenna size as
follows: Determine the area of the PICC antenna by measuring the outside dimensions of the loop antenna. The
magnetic field strength operating range is inversely proportional to the PICC antenna area (use 3000mm2 as the ID-1
antenna area).
Note: PCD magnetic field strength must be evaluated with a calibration coil similar in area to the PICC antenna, or the
measurement result will not be accurate.
Example 1: Guidelines for operation of a 6000mm2 PICC Antenna. 3000/6000 = 0.5 The minimum operating magnetic
field (Hmin) is 1.5 x 0.5 = 0.75A/m rms. The maximum operating magnetic field (Hmax) is
7.5 x 0.5 = 3.75A/m rms. This PICC can be expected to survive exposure to a non-operating magnetic field
of 10 x 0.5 = 5.0A/m rms.
Example 2: Guidelines for operation of a 1000 mm2 PICC Antenna. 3000/1000 = 3.0 The minimum Operating Magnetic
Field (Hmin) is 1.5 x 3.0 = 4.5 A/m rms. The maximum Operating Magnetic Field (Hmax) is 7.5 x 3.0 = 22.5
A/m rms. This PICC can be expected to survive exposure to a Non-Operating Magnetic Field of 10 x 3.0 =
30.0 A/m rms.
Warning: Exposure to magnetic field strengths in excess of 30A/m rms may be hazardous to your health.
P.5 Modulation Index
The Modulation Index of the PCD generated magnetic field is measured by placing a calibration coil or wire loop near the
PCD antenna. Connect this loop to a high impedance oscilloscope probe and measure the amplitude modulation (ASK)
waveform as shown in Figure P-1. The PCD amplitude Modulation Index is defined in ISO/IEC 14443 part 2 as the
M.I. = (A - B) / (A + B). For Type B operation the PCD modulation index is required to be between eight percent and
fourteen percent.
If the PCD modulation is insufficient then the PICC receiver will not successfully decode the transmissions. Excessive
modulation reduces the power available to the PICC and may cause it to reset.
Figure P-1. Measurement of the PCD Amplitude Modulation Index
where:
Modulation Depth =
BA
Modulation Index = A = Unmodulated Signal Amplitude
B = Modulated Signal Amplitude
( A - B )
( A + B )
B
A
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P.6 What is an ID-1 PICC Antenna?
ISO/IEC 7810 defines the mechanical requirements for plastic identification cards, including smartcards. The nominal
ID-1 card dimensions are 85.6mm by 53.98mm and 0.76mm thick. There are no antenna dimension requirements in
ISO/IEC 7810.
Typical antenna dimensions for ID-1 PICCs are described in ISO/IEC 10373-6 Section 6.3 as a “Reference PICC”
antenna. The outer dimensions of this reference antenna are 72mm x 42mm with four concentric turns. The antenna
trace width and spacing are both 0.5mm with a tolerance of +/- 20%. This is a test antenna; the number of turns required
on a real antenna may be more or less than four turns.
Additional guidance regarding ID-1 PICC antenna dimensions is provided in Amendment 4 to ISO/IEC 10373-6 in the
form of a Class 1 PICC antenna definition. A Class 1 PICC has its antenna located entirely within a zone defined by two
rectangles centered in the ID-1 dimensions. The external rectangle is 81mm by 49mm. The internal rectangle is
64mm x 34mm, with a 3mm corner radius. All antenna turns must be located between these rectangles.
Any antenna falling within the Class 1 dimensions is considered an ID-1 antenna for the purpose of this specification.
P.7 Other Characteristics Impacting Performance
The ISO/IEC 14443 standards do not guarantee that any compliant PCD will operate with any compliant PICC. A reliable
RFID system uses PICCs and PCDs matched to the application, with appropriately sized antennas. Discussion of the
numerous factors impacting the performance of RFID systems is beyond the scope of this document.
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Appendix Q Transaction Time
Q.1 Command Response Times [88SC]
The command response time is the time between the end of the frame transmitted by the reader and beginning of the
response from the PICC. It consists of the TR0 Guard Time and the TR1 Synchronization Time.
Table Q-1. Command Response Timing for the CryptoRF Command Set for 88SC PICCs(1)
Note: 1. Nominal values at 25° C. Values are based on characterization and are not tested.
Command
Typical TR0
(microseconds)
Maximum TR0
(microseconds)
Typical TR1
(microseconds)
REQB/WUPB 83 90 97
Slot MARKER 83 90 97
ATTRIB 83 90 97
HLTB 83 90 97
DESELECT 83 90 97
IDLE 83 90 97
Set User Zone 230 235 97
Read User Zone 93 100 97
Write User Zone 1725 2130 97
Write User Zone with Anti-Tearing 6690 8300 97
Write User Zone Authentication Mode 112 120 97
Write User Zone Encryption Mode 112 120 97
Write System Zone 1725 2130 97
Write System Zone with Anti-Tearing 6690 8300 97
Read System Zone 93 100 97
Verify Crypto 1870 2275 97
Send Checksum 112 120 97
Send Checksum Authentication Mode 1725 2130 97
Send Checksum Encryption Mode 1725 2130 97
Get Checksum 93 100 97
Read Fuse Byte 93 100 97
Write Fuse Byte 1725 2130 97
Check Password 1725 2130 97
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Q.2 Command Response Times [88RF]
The command response time is the time between the end of the frame transmitted by the reader and beginning of the
response from the PICC. It consists of the TR0 Guard Time and the TR1 Synchronization Time.
Table Q-2. Command Response Timing for the CryptoRF Command Set for 88RF PICCs(1)
Note: 1. Nominal values at 25° C. Values are based on characterization and are not tested.
Command
Typical TR0
(microseconds)
Maximum TR0
(microseconds)
Typical TR1
(microseconds)
REQB/WUPB 83 90 97
Slot MARKER 83 90 97
ATTRIB 83 90 97
HLTB 83 90 97
DESELECT 83 90 97
IDLE 83 90 97
Set User Zone 230 235 97
Read User Zone 93 100 97
Write User Zone 16 Bytes 2424 2700 97
Write User Zone with Anti-Tearing 8 bytes 7087 8000 97
Write User Zone Authentication Mode 16 bytes 2424 2700 97
Write User Zone Encryption Mode 16 bytes 2424 2700 97
Write System Zone 16 bytes 2424 2700 97
Read System Zone 93 100 97
Verify Crypto 1870 2275 97
Send Checksum 112 120 97
Send Checksum Authentication Mode 1725 2130 97
Send Checksum Encryption Mode 1725 2130 97
Get Checksum 93 100 97
Read Fuse Byte 93 100 97
Write Fuse Byte 1725 2130 97
Check Password 1725 2130 97
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Q.3 Transaction Times [88SC]
Typical transaction times for each individual command are listed below. This time includes the command transmission
time from the reader, TR0, TR1, and response transmission time from the PICC. The typical transaction times in the table
are calculated with zero EGT for both the reader and PICC frames. The maximum transaction times are calculated with
EGT = 2 ETUs for both the reader and PICC frames.
Table Q-3. Transaction Time for the CryptoRF Command Set for 88SC PICCs(1)
Note: 1. Nominal values at 25° C. Values are based on characterization and are not tested.
Command
Typical Transaction Time
(milliseconds)
Maximum Transaction Time
(milliseconds)
REQB/WUPB 2.4 2.8
Slot MARKER 2.3 2.6
ATTRIB 2.0 2.2
HLTB 1.6 1.8
DESELECT 1.4 1.6
IDLE 1.4 1.6
Set User Zone 1.6 1.8
Read User Zone 1 byte 1.8 2.0
Read User Zone 16 bytes 3.2 3.7
Read User Zone 32 bytes 4.7 5.5
Read User Zone 64 bytes 7.7 9.2
Write User Zone 1 byte 3.4 4.1
Write User Zone 8 bytes 4.1 4.9
Write User Zone with AT 8 bytes 9.0 11.0
Write User Zone 16 bytes 4.8 5.8
Write User Zone 32 bytes 6.4 7.6
Read System Zone 1 byte 1.8 2.0
Read System Zone 16 bytes 3.2 3.7
Read System Zone 32 bytes 4.7 5.5
Write System Zone 1 byte 3.4 4.1
Write System Zone 8 bytes 4.1 4.9
Write System Zone 16 bytes 4.8 5.8
Verify Crypto 4.8 5.7
Send Checksum 1.6 1.8
Send Checksum Authentication Mode 3.2 3.8
Send Checksum Encryption Mode 3.2 3.8
Get Checksum 1.9 2.1
Check Password 3.4 4.1
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Q.4 Transaction Times [88RF]
Typical transaction times for each individual command are listed below. This time includes the command transmission
time from the reader, TR0, TR1, and response transmission time from the PICC. The typical transaction times in the table
are calculated with zero EGT for both the reader and PICC frames. The maximum transaction times are calculated with
EGT = 2 ETUs for both the reader and PICC frames.
Table Q-4. Transaction Time for the CryptoRF Command Set for 88RF PICCs(1)
Note: 1. Nominal values at 25° C. Values are based on characterization and are not tested.
Command
Typical Transaction Time
(milliseconds)
Maximum Transaction Time
(milliseconds)
REQB/WUPB 2.4 2.8
Slot MARKER 2.3 2.6
ATTRIB 2.0 2.2
HLTB 1.6 1.8
DESELECT 1.4 1.6
IDLE 1.4 1.6
Set User Zone 1.6 1.8
Read User Zone 1 byte 1.8 2.0
Read User Zone 16 bytes 3.2 3.7
Read User Zone 32 bytes 4.7 5.5
Read User Zone 64 bytes 7.7 9.2
Write User Zone 1 byte 3.6 4.1
Write User Zone 8 bytes 4.5 4.9
Write User Zone with AT 8 bytes 9.5 11.0
Write User Zone 16 bytes 5.6 6.1
Read System Zone 1 byte 1.8 2.0
Read System Zone 16 bytes 3.2 3.7
Read System Zone 32 bytes 4.7 5.5
Write System Zone 1 byte 3.6 4.1
Write System Zone 8 bytes 4.5 4.9
Write System Zone 16 bytes 5.6 6.1
Verify Crypto 4.8 5.7
Send Checksum 1.6 1.8
Send Checksum Authentication Mode 3.2 3.8
Send Checksum Encryption Mode 3.2 3.8
Get Checksum 1.9 2.1
Check Password 3.4 4.1
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Appendix R 88RF PICC Backward Compatibility
88RF PICCs can be configured to operate in the majority of applications developed for 88SC PICCs. Customers
migrating from 88SC devices to 88RF devices may be required to change their application software if they are using
functions identified in this appendix.
R.1 Error Handling
When a command packet containing errors is received by an 88SC or 88RF PICC, the status code returned in the NACK
response is the first error detected by the logic. The status code returned by 88RF PICCs may be different from the
status code returned by 88SC PICCs.
R.2 Security Options
The Access Register (AR) and Device Configuration Register (DCR) definitions for 88RF PICCs are not exactly the same
as the 88SC PICC definitions. Some RFU bits have been assigned new functionality. The changes which impact
backward compatibility are summarized here.
R.2.1 Program Only Mode
88RF PICCs allows the Program Only Mode in User Zone 1 only. Program Only Mode is not allowed in User Zones 0, 2,
or 3. The Access Register PGO bit is RFU for registers AR0, AR2, and AR3.
R.2.2 Write Lock Mode
88RF PICCs do not support Write Lock Mode. The Access Register WLM bit is RFU.
R.2.3 Unlimited Checksum Read
88RF PICCs do not support Unlimited Checksum Reads. The Device Configuration Register UCR bit is RFU.
R.2.4 Extended Trials Allowed
The CryptoRF Device Configuration Register ETA bit is RFU. The 88RF PICC attempts limit is always 15; it is no longer
configurable. [88SC PICCs allowed four or eight attempts.]
R.2.5 Dual Access Mode
88RF PICCs do not support Dual Access Mode. The CryptoRF Access Register bits which selected Dual Access Mode
have been assigned to another communication security mode.
R.3 Attempt Counters
Both the Password Attempts Counters (PACs) and Authentication Attempts Counters (AACs) have been redesigned to
allow 15 failed attempts before the Password or Key is locked. The coding of the PAC and AAC registers has been
changed to support the increased attempts counts.
R.4 Checksums
The requirement to supply a valid checksum when performing a write in Encryption Communication mode and
Authentication Communication mode is strictly enforced by 88RF PICCs. (88SC PICCs require a valid checksum if the
Access Register security mode bits for the current User Zone require that Encryption Communication mode or
Authentication Communication mode be active to write the User Zone. If Authentication or Encryption is not required,
then 88SC PICCs do not always require that a valid checksum be supplied to perform a write.)
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R.5 Personalization
The 88RF PICC fuse bit functionality has been changed to allow enhanced security during the device personalization
process. See Appendix F and Appendix G for information.
Customers that do not program any of the security fuses until the end of the personalization process will not notice a
difference when personalizing 88RF PICCs. 88RF PICCs act the same as 88SC PICCs when the security fuses are in
the default state.
R.5.1 Write System Zone with Anti-Tearing
88RF PICCs do not support Anti-Tearing writes using the Write System Zone command. Attempts to activate this option
will result in a NACK response.
R.5.2 Reserved Memory
88RF PICCs do not allow writes to registers identified in the Configuration Memory Map as reserved. Any attempts to
write these registers will be NACKed. Attempts to read the Configuration Memory using a starting address which is a
reserved byte will be NACKed.
R.5.3 OTP Memory
88RF PICCs have 25 bytes of OTP memory available for customer use in the Configuration Memory; 88SC PICCs have
27 bytes of OTP memory available for customer use. In 88RF PICCs bytes $0E and $0F are the read-only Hardware
Revision Register (HWR); in 88SC PICCs these bytes are available for customer use.
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Appendix S Ordering Information
S.1 CryptoRF with 4Kb of User Memory Configured as 4 Zones of 128 bytes Each
S.2 CryptoRF with 8Kb of User Memory Configured as 8 Zones of 128 bytes Each
S.3 CryptoRF with 16Kb of User Memory Configured as 16 Zones of 128 bytes Each
Ordering Code Package Tuning Capacitor Temperature Range
AT88RF04C-MR1G R Module
82pF
Commercial
(0C to 70C)
AT88RF04C-MX1G MX1 RFID Tag, 13.0mm square Commercial
(-25C to 70C)
AT88RF04C-MVA1 MVA1 RFID Tag, 8.6mm x 18.1mm
AT88RF04C-WA1 6mil wafer, 150.0mm diameter Industrial
(-40C to 85C)
Ordering Code Package Tuning Capacitor Temperature Range
AT88SC0808CRF-MR1 R Module
82pF
Commercial
(0C to 70C)
AT88SC0808CRF-MX1 MX1 RFID Tag, 13.0mm square Commercial
(-25C to 70C)
AT88SC0808CRF-MVA1 MVA1 RFID Tag, 8.6mm x 18.1mm
AT88SC0808CRF-WA1 6mil wafer, 150.0mm diameter Industrial
(25C to 85C)
Ordering Code Package Tuning Capacitor Temperature Range
AT88SC1616CRF-MX1 MX1 RFID Tag, 13.0mm square
82pF
Commercial
(-25C to 70C)
AT88SC1616CRF-MVA1 MVA1 RFID Tag, 8.6mm x 18.1mm
AT88SC1616CRF-WA1 6mil wafer, 150.0mm diameter Industrial
(25C to 85C)
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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S.4 CryptoRF with 32Kb of User Memory Configured as 16 Zones of 256 bytes Each
S.5 CryptoRF with 64Kb of User Memory Configured as 16 Zones of 512 bytes Each
S.6 Package Types
Notes: 1. Lead-free, halogen-free package. Exceeds RoHS requirements.
2. The ordering codes for CryptoRF in standard packages are listed here. For additional ordering information
see CryptoRF and Secure RF Standard Product Offerings at www.atmel.com.
Ordering Code Package Tuning Capacitor Temperature Range
AT88SC3216CRF-MX1 MX1 RFID Tag, 13.0mm square
82pF
Commercial
(-25C to 70C)
AT88SC3216CRF-MVA1 MVA1 RFID Tag, 8.6mm x 18.1mm
AT88SC3216CRF-WA1 6mil wafer, 150.0mm diameter Industrial
(25C to 85C)
Ordering Code Package Tuning Capacitor Temperature Range
AT88SC6416CRF-MR1 R Module
82pF
Commercial
(0C to 70C)
AT88SC6416CRF-MX1 MX1 RFID Tag, 13.0mm square Commercial
(-25C to 70C)
AT88SC6416CRF-MVA1 MVA1 RFID Tag, 8.6mm x 18.1mm
AT88SC6416CRF-WA1 6mil wafer, 150.0mm diameter Industrial
(25C to 85C)
Package Type Description
R Module 2-lead RF Smart Card Module, XOA2 style, on 35.0mm tape, Ag Finish, Green(1)
MX1 RFID Tag 13.0mm x 13.0mm Square Epoxy Glass RFID Tag on 35.0mm tape, Au Finish, Green(1)
MVA1 RFID Tag 8.6mm x 18.1mm Rectangular Epoxy Glass RFID Tag on 35.0mm tape, Au Finish, Green(1)
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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S.7 Packaging Information — Mechanical Drawings
S.7.1 Module R Package (XOA2 Style) — Ordering Code: AT88RFxxC-MR1G and AT88SCxxCRF-MR1
Module Size: M5
Dimension: 5.06mm x 8.00mm
Glob Top: Square – 4.8mm x 5.1mm
Thickness: 0.38mm
Pitch: 9.5mm
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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S.7.2 MX1 Epoxy Glass RFID Tag — Ordering Code: AT88RFxxC-MX1G and AT88SCxxCRF-MX1
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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S.7.3 MVA1 Epoxy Glass RFID Tag — Ordering Code: AT88RF04C-MVA1 and AT88SCxxCRF-MVA1
5
cTBD
3
4
Tape Orientation Arrow
7
.165±0.025
Original vendor reference
for true position of
metal features.
4.75
18.10
8.60
.75±0.15
15.92 25.02
6.82
19
17.5
8
35
31.8
21.8
3.6
12.7
3.5
12.6
21.7
6.9
Electrical/Mechanical Reject Hole 2.2±0.3
2±0.3 Tape Supplier Reject Hole
7 MAX
7 MAX
7 MAX
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix T Errata
T.1 Lot History Code Register Contents
The format of the Lot History Code Register at addresses $10 thru $17 of the Configuration Memory has been changed
to contain a Unique Serial Number for each die. The first 41 bits of the register contain the Unique Serial Number, while
the other 23 bits contain additional lot history information. Since this is a read-only register, these bits can be used by
customers to uniquely identify a particular die for anticollision, authentication key diversification, or any other purpose
required by the application.
Table T-1. Contents of UDSN (Lot History Code) Register
This register format change is effective on all CryptoRF products manufactured in July 2008 or later. Prior to July 2008,
the contents of the Lot History Code Register are not unique for each die.
Atmel reserves the right to modify the format of the contents of the UDSN register without notice; however, the UDSN
register value is guaranteed to be unique for each die. The register name in the Configuration Memory Maps has been
updated to Unique Die Serial Number in Revision B of this document to reflect this change.
T.2 Read User Zone command
As the Read User Zone command reads data from the device's currently selected User Zone the data byte address is
internally incremented as each byte is read from memory. If the data byte address increments beyond the end of the
current User Zone during a read, then the address will roll-over to the first byte of the same User Zone.
T.3 Read User Zone command PARAM Codes [88RF]
The Read User Zone command accepts PARAM = $01, $02, $03 and interprets them as PARAM = $00. The Read User
Zone command accepts PARAM = $81, $82, $83 and interprets them as PARAM = $80. In both cases, the read
operation succeeds, when it should NACKed due to an invalid PARAM.
This error will be fixed in future products. Customers are advised that these PARAM values are not supported.
T.4 Status Codes [88RF]
In the response to each CryptoRF command the PICC returns a Status Code which indicates the state of the device or
the reason for failure of a requested operation. 88RF PICCs are known to return misleading Status Codes under certain
circumstances:
Write User Zone command
The Write User Zone command returns Status Code $A1 and NACK when L greater than $0F is sent. A Status Code $A3
is expected. The write operation fails and no data is written.
Write System Zone command
The Write System Zone command returns Status Code $B0 and ACK when the integrated checksum option is used in
the encryption communication mode. A Status Code $00 is expected. The write operation succeeds and the data is
written to the EEPROM correctly.
Addr $10 $11 $12 $13 $14 $15 $16 $17
$10 Unique Serial Number Other Lot Information Read Only
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The Write System Zone command returns Status Code $C9 and NACK when PARAM = $02 is sent. A Status Code $A1
is expected. The write operation fails and no data is written.
The Write System Zone command returns Status Code $00 and NACK when PARAM = $0C and an invalid ADDR is
sent. A Status Code $A2 is expected. The operation fails and no data is written.
Customers are advised that past and future products may return Status Codes that are different. The ACK/NACK byte
reports if a requested operation has passed or failed; the Status code contains additional information.
T.5 Encryption Activation Change [88RF]
One byte value in the Encryption Activation procedure has been changed to allow 88RF PICCs to be used with the
AT88SC018 CryptoMemory Companion chip. This change may impact customers migrating from 88SC PICCs to 88RF
PICCs if the Encryption Communication Security mode is used.
When the host calculates the Authentication Activation Challenge at Step 8. in Appendix K.8, a value of $FF must be
substituted in the calculation (in place of the actual 88RF PICC AAC value of $55).
This change is intentional.
AT88SC0808CRF/1616CRF/3216CRF/6416CRF, AT88RF04C [Datasheet]
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Appendix U Revision History
Doc. Rev. Date Comments
5276F 01/2014
Add MVA1 ordering option.
Remove MR1 ordering option for 16Kb and 32Kb devices.
Update footers and disclaimer page.
5276E 10/2012
Decrease absolute maximum operating temperature (Junction) from
(-40 to 85C) to (-25°C to 85C).
Decrease industrial temperature range from (-40C to 85C) to (25C to 85C) for
AT88SC0808CRF, AT88SC1616CRF, AT88SC3216CRF, and AT88SC6416CRF.
5276D 08/2012 Remove MY1 package option.
Update template and Atmel logo.
5276C 03/2009 Remove AT88SC0104CRF, AT88SC0204CRF, AT88SC0404CRF.
Add AT88RF04C Specifications.
5276B 03/2009
Add all CryptoRF Security Function Specifications.
This Specification now requires an LLA license.
Removed LLA August 2009.
5276A 07/2008 Initial document summary release.
X
XXX
XX
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© 2014 Atmel Corporation. / Rev.: Atmel-5276G-CryptoRF-AT88SC0808CRF-1616CRF-3216CRF-6416CRF-AT88RF04C-Datasheet_012014.
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