AT88SC0104C, AT88SC0808C, AT88SC6416C, AT88SC0204C, AT88SC0404C, AT88SC1616C, AT88SC3216C, AT88SC12816C, AT88SC25616C Atmel CryptoMemory Full Specification DATASHEET Features A Family of Nine Devices with User Memories from 1-Kbit to 256-Kbit EEPROM User Memory 4, 8, or 16 Zones Self-timed Write Cycles Single-byte or Multiple-byte Page Write Modes Programmable Access Rights for Each Zone 2-Kbit Configuration Memory 37-byte OTP Area for User-Defined Codes 160-byte Area for User-Defined Keys and Passwords High Security Features Embedded Application Features Low Voltage Operation: 2.7V to 5.5V Secure Nonvolatile Storage for Sensitive System or User Information 2-Wire Serial Interface 1MHz Compatibility for Fast Operation Standard 8-lead Plastic Packages Same Pinout as 2-Wire Serial EEPROMs Smart Card Features 64-bit Mutual Authentication Protocol (Under License of ELVA) Encrypted Checksum Stream Encryption Four Key Sets for Authentication and Encryption Eight Sets of Two 24-bit Passwords Anti-tearing Function Voltage and Frequency Monitor ISO 7816 Class A (5V) or Class B (3V) Operation Synchronous 2-Wire Serial Interface for Faster Device Initialization* ISO 7816-3 Asynchronous T = 0 Protocol (Gemplus(R) Patent)* Multiple Zones, Key Sets, and Passwords for Multi-application Use Programmable 8-byte Answer-To-Reset (ATR) Register ISO 7816-2 Compliant Modules High Reliability Endurance: 100,000 Cycles Data Retention: 10 Years ESD Protection: 4,000V * Note: Modules available with either 2-wire or T = 0 modes. Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 Table of Contents 1. Pin Configuration and Package Information .................................................... 5 1.1 1.2 Pin Configuration ................................................................................................ 5 Package Information ........................................................................................... 5 2. Description ....................................................................................................... 5 2.1 2.2 2.3 Embedded Applications ...................................................................................... 5 Smart Card Applications ..................................................................................... 6 Scope and Purpose of This Document ............................................................... 6 3. Pin Description ................................................................................................ 7 3.1 3.2 3.3 3.4 Supply Voltage (VCC) .......................................................................................... 7 Clock (SCL/CLK)................................................................................................. 7 Serial Data (SDA/IO)........................................................................................... 7 Reset (RST) ........................................................................................................ 7 4. Detailed Description ........................................................................................ 8 4.1 4.2 4.3 User Memory ...................................................................................................... 8 Control Logic ..................................................................................................... 13 Configuration Memory....................................................................................... 13 5. Communication Security Modes .................................................................... 17 5.1 5.2 5.3 5.4 Security Operations .......................................................................................... 17 5.1.1 Password Verification ............................................................................. 17 5.1.2 Mutual Authentication ............................................................................. 18 5.1.3 Data Encryption...................................................................................... 19 5.1.4 Encrypted Checksum ............................................................................. 19 Data Protection Features .................................................................................. 20 5.2.1 Modify Forbidden ................................................................................... 20 5.2.2 Program Only ......................................................................................... 20 5.2.3 Write Lock .............................................................................................. 20 5.2.4 Anti-tearing (Power Loss Protection) ...................................................... 20 Configuration Memory Values ........................................................................... 21 5.3.1 Default Values ........................................................................................ 21 5.3.2 Answer To Reset (ATR) ......................................................................... 21 5.3.3 Fab Code ............................................................................................... 21 5.3.4 Memory Test Zone (MTZ) ...................................................................... 21 5.3.5 Card Manufacturer Code ........................................................................ 21 5.3.6 Lot History Code .................................................................................... 21 5.3.7 Issuer Code ............................................................................................ 21 5.3.8 Device Configuration Register (DCR) .................................................... 22 5.3.9 Access Registers ................................................................................... 22 5.3.10 Password/Key Registers ........................................................................ 24 5.3.11 Identification Number ............................................................................. 24 5.3.12 Cryptograms (C0 - C3) ........................................................................... 24 5.3.13 Session Keys (S0 - S3)........................................................................... 24 5.3.14 Secret Seeds (G0-G3) ............................................................................. 25 5.3.15 Password Sets ....................................................................................... 25 5.3.16 Secure Code .......................................................................................... 25 5.3.17 Password Attempts Counters (PAC) ...................................................... 25 5.3.18 Authentication Attempts Counters (AAC) ............................................... 25 Security Fuses .................................................................................................. 25 6. Protocol Selection.......................................................................................... 27 6.1 6.2 2 Synchronous Mode for Embedded Applications ............................................... 27 Asynchronous Mode for Smart Card Applications ............................................ 27 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 7. Synchronous Protocol ................................................................................... 29 7.1 7.2 7.3 7.4 7.5 7.6 Start-up Sequence ............................................................................................ 29 Command Set ................................................................................................... 30 Command Format ............................................................................................. 31 Acknowledge Polling ......................................................................................... 32 Device Addressing ............................................................................................ 33 Command Descriptions..................................................................................... 33 7.6.1 Write User Zone: $B0 ............................................................................. 33 7.6.2 Read User Zone: $B2 ............................................................................ 34 7.6.3 System WRITE: $B4 .............................................................................. 35 7.6.4 System Read: $B6 ................................................................................. 37 7.6.5 Verify Crypto: $B8 .................................................................................. 39 Verify Password: $BA ....................................................................................... 41 8. Initialization Example ..................................................................................... 42 8.1 8.2 8.3 8.4 Write Data to User Zones ................................................................................. 42 Unlock the Configuration Memory ..................................................................... 42 Write Data to the Configuration Memory ........................................................... 42 Set Security Fuses ............................................................................................ 42 9. Asynchronous T=0 Protocol .......................................................................... 45 9.1 9.2 9.3 9.4 Character Format .............................................................................................. 45 Command format .............................................................................................. 45 PPS Support ..................................................................................................... 46 Command Set ................................................................................................... 48 9.4.1 Status Words.......................................................................................... 49 9.4.2 Example: Write EEPROM Command ..................................................... 50 9.4.3 Write User Zone: $B0 ............................................................................. 51 9.4.4 Read User Zone: $B2 ............................................................................ 52 9.4.5 System Write: $B4 ................................................................................. 53 9.4.6 Send Checksum ..................................................................................... 54 9.4.7 System READ: $B6 ................................................................................ 55 9.4.8 Verify Crypto: $B8 .................................................................................. 57 9.4.9 Verify Password: $BA ............................................................................ 59 10. Initialization Example ..................................................................................... 60 10.1 10.2 10.3 10.4 Write Data to User Zones ................................................................................. 60 Unlock the Configuration Memory ..................................................................... 60 Write Data to the Configuration Memory ........................................................... 60 Set Security Fuses ............................................................................................ 60 11. Absolute Maximum Ratings* ......................................................................... 63 11.1 DC and AC Characteristics ............................................................................... 63 11.2 Timing Diagrams for Synchronous Communications ........................................ 65 12. DC Tamper Detection Limits ......................................................................... 67 12.1 12.2 12.3 12.4 12.5 High Voltage and Low Voltage Limit ................................................................. 67 Minimum Clock Pulse ....................................................................................... 67 Maximum Clock Frequency .............................................................................. 67 Power On Reset (POR) Delay .......................................................................... 67 Noise Suppression ............................................................................................ 67 13. Ordering Information...................................................................................... 68 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 3 14. Package Marking Information ........................................................................ 69 14.1 14.2 14.3 14.4 14.5 14.6 14.7 14.8 14.9 AT88SC0104C .................................................................................................. 69 AT88SC0204C .................................................................................................. 70 AT88SC0404C .................................................................................................. 71 AT88SC0808C .................................................................................................. 72 AT88SC1616C .................................................................................................. 73 AT88SC3216C .................................................................................................. 74 AT88SC6416C .................................................................................................. 75 AT88SC12816C ................................................................................................ 76 AT88SC25616C ................................................................................................ 77 15. Revision History............................................................................................. 78 4 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 1. Pin Configuration and Package Information 1.1 Pin Configuration Table 1-1. 1.2 Package Pin Assignments Pad Description ISO Module TWI Module SOIC, PDIP VCC Supply Voltage C1 C1 8 GND Ground C5 C5 4 SCL/CLK Serial Clock Input C3 C3 6 SDA/IO Serial Data Input/Output C7 C7 5 RST Reset Input C2 NC NC Package Information Figure 1-1. Package Configuration ISO Smart r Card Module VCC=C1 RST=C2 SCL/CLK=C3 NC=C4 C5=GND C6=NC C7=SDA/IO C8=NC 8-lead SOIC, PDIP NC NC NC GND 2. 1 2 3 4 8 7 6 5 TWI Smart Card Module VCC NC SCL VCC=C1 C5=GND NC=C2 C6=NC SCL/CLK=C3 NC=C4 C7=SDA/IO C8=NC SDA Description Atmel(R) AT88SCxxxxC is a family of nine high-performance secure memory devices providing 1-Kbit to 256-Kbit of user memory with advanced built-in security and cryptographic features. The memory is divided into 4, 8, or 16 user zones each of which may be individually set with different security access rights or used together to effectively provide space for one or multiple data files. Atmel CryptoMemory(R) has a configuration memory which contains registers to define the security rights for each user zone and space for passwords and secret keys used by the security logic of CryptoMemory. Through dynamic, symmetric mutual authentication, data encryption, and the use of encrypted checksums, CryptoMemory provides a secure place for storage of sensitive information within a system. With its tamper protection circuits, this information remains safe even under attack. CryptoMemory also provides high security, low cost, and ease of implementation of host-client type systems without the need for a microprocessor operating system. The embedded cryptographic engine provides for a dynamic, symmetric mutual authentication between the device and host, as well as, performs stream encryption for all data and passwords exchanged between the device and host. Up to four unique key sets are available for these operations. 2.1 Embedded Applications A 2-Wire serial interface running at 1MHz is used for fast and efficient communications with up to 15 devices which can be individually addressed. CryptoMemory is available in industry standard 8-lead packages with the same familiar pinout as 2-Wire Serial EEPROMs supporting only the synchronous communications protocol. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 5 2.2 Smart Card Applications CryptoMemory offers the ability to communicate with virtually any smart card reader using the asynchronous T=0 protocol defined in ISO 7816-3. For devices with 32-Kbit of user memory and larger, communication speeds up to 153,600baud are supported by utilizing ISO 7816-3 protocol and parameter selection. All CryptoMemory devices in smart card module form will also communicate using a synchronous 2-Wire serial interface. 2.3 Scope and Purpose of This Document This document covers all three major operational modes of CryptoMemory Standard Mode Authentication Mode Encryption Mode This document provides all information necessary to take full advantage of the security capabilities of CryptoMemory. It is designed for use in conjunction with functional cryptographic libraries or companion hardware from Atmel; therefore, requires cryptographic library and or companion hardware documentation to complement its use. Contact your regional Atmel sales office for information on the most current version of functional libraries and/or available cryptographic companion hardware. Figure 2-1. Block Diagram VCC GND Power Management Authentication, Encryption and Certification Unit Synchronous Interface Data Transfer EEPROM SCL/CLK SDA/IO RST 6 Asynchronous ISO Interface Password Verification Reset Block Answer to Reset AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 3. Pin Description 3.1 Supply Voltage (VCC) The VCC input is a 2.7V to 5.5V positive voltage supplied by the host. 3.2 Clock (SCL/CLK) In the asynchronous T=0 protocol, the SCL/CLK input is used to provide the device with a carrier frequency f. The nominal length of one bit emitted on I/O is defined as an "elementary time unit" (etu) and is equal to 372/f. When the synchronous protocol is used, the SCL/CLK input is used to clock data in on the positive clock edge and clock data out on the negative clock edge. 3.3 Serial Data (SDA/IO) The SDA pin is bi-directional for serial data transfer. This pin is open-drain driven and may be wired with any number of other open drain or open collector devices. An external pull-up resistor should be connected between SDA and VCC, a nominal value of 4.7K may be used. The value of this resistor and the system capacitance loading the SDA bus will determine the rise time of SDA. This rise time will determine the maximum frequency during read operations. Low value pull-up resistors will allow higher frequency operations while drawing higher average power supply current. 3.4 Reset (RST) CryptoMemory provides an ISO 7816-3 compliant asynchronous Answer-To-Reset (ATR) sequence. When the reset sequence is activated, the device will output the data programmed into the 64-bit ATR register. When RST is low, all internal logic, access-rights, and write cycles are in reset except the asynchronous mode activation flag. A weak internal pull-up on the RST input pad allows the device to be used in synchronous mode without bonding RST. For synchronous only smart card applications, an external pull-up on RST is recommended to ensure synchronous operation under any system timings or conditions. CryptoMemory does not support a synchronous answer to reset sequence. The RST input is not available in the plastic package options for CryptoMemory. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 7 4. Detailed Description To enable the security features of CryptoMemory, personalize the device by setting up registers and loading appropriate passwords and keys. Do these by programming the configuration memory using simple write and read commands. Gain access to the configuration memory by successfully presenting the secure code (Write 7 Password). After writing and verifying data in the configuration memory, blow the security fuses to lock this information in the device. For additional information on personalizing CryptoMemory, please see the examples in the protocol sections of this specification, Section 10, Initialization Example. 4.1 User Memory The EEPROM user memory is divided into 4, 8, or 16 user zones. Multiple zones allow for the storage of different data types or files in different zones. Access to user zones is possible only after meeting security requirements. The customer defines these security requirements in the configuration memory during device personalization. When the same security requirements define access to multiple zones, the zones effectively serve as one large storage area albeit with the requirement to select each zone prior to access. The below nine tables present the memory map of the user zones for the different device densities. Table 4-1. AT88SC0104C User Memory Zone $0 $1 $2 $3 $4 $5 $00 User 0 32 bytes $18 $00 User 1 32 bytes $00 User 2 32 bytes $18 $00 User 3 32 bytes $18 Note: 8 Page size = 16-bytes AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 $6 $7 Table 4-2. AT88SC0204C User Memory Zone $0 $1 $2 $3 $4 $5 $6 $7 $4 $5 $6 $7 $00 User 0 64 bytes $38 $00 User 1 64 bytes $38 $00 User 2 64 bytes $38 $00 User 3 64 bytes $38 Note: Page size = 16-bytes Table 4-3. AT88SC0404C User Memory Zone $0 $1 $2 $3 $00 User 0 128 bytes $78 $00 User 1 128 bytes $78 $00 User 2 128 bytes $78 $00 User 3 128 bytes $78 Note: Page size = 16-bytes AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 9 Table 4-4. AT88SC0808C User Memory Zone $0 $1 $2 $3 $4 $5 $6 $7 $5 $6 $7 $00 User 0 128 bytes $78 User 1 User 6 $00 $78 $00 User 7 128 bytes $78 Note: Page size = 16-bytes Table 4-5. AT88SC1616C User Memory Zone $0 $1 $2 $3 $4 $00 User 0 128 bytes $78 User 1 User 14 $00 $78 $00 User 15 128 bytes $78 Note: 10 Page size = 16-bytes AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 Table 4-6. AT88SC3216C User Memory Zone $0 $1 $2 $3 $4 $5 $6 $7 $5 $6 $7 $00 User 0 256 bytes $F8 User 1 User 14 $00 $F8 $00 User 15 256 bytes $F8 Note: Page size = 64-bytes Table 4-7. AT88SC6416C User Memory Zone $0 $1 $2 $3 $4 $000 User 0 512 bytes $1F8 User 1 User 14 $000 $1F8 $000 User 15 512 bytes $1F8 Note: Page size = 64-bytes AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 11 Table 4-8. AT88SC12816C User Memory Zone $0 $1 $2 $3 $4 $5 $6 $7 $5 $6 $7 $000 User 0 1024 bytes $3F8 User 1 User 14 $000 $3F8 $000 User 15 1024 bytes $3F8 Note: Page size = 128-bytes Table 4-9. AT88SC25616C User Memory Zone $0 $1 $2 $3 $4 $000 User 0 2048 bytes $7F8 User 1 User 14 $000 $7F8 $000 User 15 2048 bytes $7F8 Note: 12 Page size = 128-bytes AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 4.2 Control Logic Access to the user zones occurs only through the device's control logic. This logic is configurable through proper programming of access, passwords and keys registers of the configuration memory during device personalization. This logic also implements the cryptographic engine for performing the various higher-level security functions of the device. 4.3 Configuration Memory The configuration memory consists of 2048-bits of EEPROM memory used for storing passwords, keys, codes, and defining security levels to be used for each user zone. The control logic defines access rights to the configuration memory as well as to the user zones and the user may not alter these rights. The access rights include the ability to program certain portions of the configuration memory and then lock the data written through the use of security fuses. The configuration memory for each CryptoMemory device is identical with the exception of the number of access registers and password/key registers available. Devices with four user zones have four sets of registers, those with eight user zones, eight sets of registers, and those with 16 user zones, 16 sets of registers. Unused memory space in the register region becomes reserved to ensure other components of the configuration memory remain at the same address location regardless of the number of user zones in a device. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 13 Table 4-10. AT88SC0104C/0204C/0404C Configuration Memory $0 $1 $2 $3 $00 $08 $4 $5 $6 $7 Answer to Reset Fab Code MTZ $10 Identification Card Manufacturer Code Lot History Code $18 DCR $20 AR0 Read Only Identification Number Nc PR0 AR1 PR1 AR2 PR2 AR3 PR3 $28 $30 Reserved Access Control $38 $40 Issuer Code $48 $50 AAC0 $58 $60 Session Encryption Key S0 AAC1 $68 $70 Cryptogram C1 Session Encryption Key S1 AAC2 $78 $80 Cryptogram C0 Session Encryption Key S2 AAC3 Cryptogram C3 $88 Session Encryption Key S3 $90 Secret Seed G0 $98 Secret Seed G1 $A0 Secret Seed G2 $A8 Secret Seed G3 Secret $B0 PAC Write 0 PAC Read 0 $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 $F8 14 Cryptography Cryptogram C2 Reserved AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 Password Forbidden Table 4-11. AT88SC0808C Configuration Memory $0 $1 $2 $3 $00 $08 $4 $5 $6 $7 Answer to Reset Fab Code MTZ $10 Identification Card Manufacturer Code Lot History Code Read-Only $18 DCR Identification Number Nc $20 AR0 PR0 AR1 PR1 AR2 PR2 AR3 PR3 $28 AR4 PR4 AR5 PR5 AR6 PR6 AR7 PR7 $30 $38 $40 Issuer Code $48 $50 AAC0 $58 $60 AAC1 Cryptogram C1 Session Encryption Key S1 AAC2 $78 $80 Cryptogram C0 Session Encryption Key S0 $68 $70 Access Control Reserved Cryptography Cryptogram C2 Session Encryption Key S2 AAC3 Cryptogram C3 $88 Session Encryption Key S3 $90 Secret Seed G0 $98 Secret Seed G1 $A0 Secret Seed G2 $A8 Secret Seed G3 Secret $B0 PAC Write 0 PAC Read 0 $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 $F8 Reserved Password Forbidden AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 15 Table 4-12. AT88SC1616C/3216C/6416C/12816C/25616C Configuration Memory $0 $1 $2 $3 $00 $08 $5 $6 $7 Answer to Reset Fab Code MTZ $10 Identification Card Manufacturer Code Lot History Code Read-Only $18 DCR Identification Number Nc $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 $50 AAC0 $58 $60 AAC1 Cryptogram C1 Session Encryption Key S1 AAC2 $78 $80 Cryptogram C0 Session Encryption Key S0 $68 $70 Access Control Issuer Code $48 Cryptography Cryptogram C2 Session Encryption Key S2 AAC3 Cryptogram C3 $88 Session Encryption Key S3 $90 Secret Seed G0 $98 Secret Seed G1 $A0 Secret Seed G2 $A8 Secret Seed G3 Secret $B0 PAC Write 0 PAC Read 0 $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 $F8 16 $4 Reserved AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 Password Forbidden 5. Communication Security Modes Communication between the device and host operates in three basic modes. Standard mode is the default mode for the device after power-up. Authentication mode is activated by a successful authentication sequence. Encryption mode is activated by a successful encryption activation following a successful authentication. Data transferred to and from the device is handled per the following table. Table 5-1. Communication Security Modes Mode Configuration Data User Data Passwords Data Integrity Check Standard/Password Clear Clear Clear N/A Authentication Clear Clear Encrypted MAC Encryption Clear Encrypted Encrypted MAC Note: Configuration data includes the entire configuration memory except the passwords MAC: Message Authentication Code 5.1 Security Operations 5.1.1 Password Verification The use of passwords protects read and write accesses to the user zones. Any one of eight password sets is available for assignment to any user zone through configuration of access registers. CryptoMemory provides separate 24-bit passwords for read and write operations. Read passwords grant only read accesses to zones under password protection, while write passwords grant both read and write accesses. Successful presentation of any password renders the verify password command active until the presentation of another password or device reset. Only one password may be active at a time. Presenting incorrect passwords decrements the value of the corresponding Password Attempts Counter (PAC). Decrementing the PAC to $00 permanently disables the corresponding password and permanently renders the corresponding user zone(s) under protection inaccessible. Operation in authentication or encryption mode requires encryption of passwords for all password transactions. Figure 5-1. Password Verification CryptoMemory Device Command/Communications Host Logic Verify Password VERIFY Password Allow Access Send Password encrypted if performed after Mutual Authentication AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 17 5.1.2 Mutual Authentication The use of a mutual authentication protocol further protects access to user zones. Any one of four key sets is available for assignment to any user zone through configuration of access registers. Each key set consists of a secret seed, a cryptogram, and a session encryption key. A Verify Crypto command exists to allow the use of any one of the key sets to enter authentication mode. Each successful entry into authentication mode renders the mode active until the next call to the Verify Crypto command or device reset. Only one key set may be active at anytime. Unsuccessful calls of the Verify Crypto command exits authentication mode and decrements the value of the Authentication Attempts Counter (AAC) register. Decrementing AAC to $00 permanently disables the corresponding key set and permanently renders the corresponding user zone(s) under protection inaccessible. Entry into authentication mode is a process through which the host and CryptoMemory device mutually authenticate one another. First, the host generates a 64-bit random number, reads a current cryptogram from the device, and uses this information in conjunction with the corresponding secret seed to generate a 64-bit challenge for the device. The host also generates a new cryptogram and session encryption key in the process. The host then sends the challenge and random number to the device by calling the Verify Crypto command. The device utilizes the random number from the host to generate its own challenge, new cryptogram, and session encryption key. It then compares its challenge to the one from the host. If the challenges match, then the device declares the host authentic, overwrites its corresponding current cryptogram and session encryption key with the new ones. To complete the mutual authentication, the host reads the new cryptogram from the device and compares it with its newly calculated cryptogram. The new cryptogram from the device serves as a challenge to the host. If the cryptograms match then the device is authentic. Only an authentic pair of host and device can generate the same challenges and cryptograms. Mutual authentication requires the use of the verify authentication variant of the Verify Crypto command (see Table 7-1, "Atmel CryptoMemory Synchronous Command Set," or Table 9-2, "Atmel CryptoMemory Asynchronous Command Set"). Figure 5-2. The Mutual Authentication Process CryptoMemory Device Device Info, Cryptogram [Secret Seed] Command/Communications Read Config Zone Host Logic Read Device Info, Cryptogram Compute Secret Seed Generate Random Number Verify Authentication Compute Challenge A Compute Challenge A Verify Challenge A Compute Challenge B Compute Session Key Compute Challenge B Compute Session Key Allow Access 18 Read Config Zone Read Challenge B Verify Challenge B Allow Access AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 5.1.3 Data Encryption CryptoMemory allows the use of encryption between a host system and the CryptoMemory device to protect the confidentiality of data during read-write accesses and verify password operations. To enable encryption, the host must call the Verify Crypto command with a valid session encryption key when the device is already in active authentication mode. The session encryption key must belong to the active authentication key set. The host may enable encryption at any time after which data content of communication between host and device user zones becomes encrypted. If a user zone configuration in the access register requires encryption; however, then the host must enter encryption mode and must encrypt all data content to and from the zone in the remainder of the active encryption session in order to communicate with the zone. CryptoMemory does not encrypt system zone data except for password and password attempt counters. Passwords and password attempt counters require encryption during active authentication or encryption modes. Each successful entry into encryption mode renders the mode active for the current key set until the next call to the Verify Crypto command or device reset. Only one key set may be active at anytime. Unsuccessful calls of the Verify Crypto command exits both encryption and authentication modes and decrements the value of the authentication attempts counter (AAC) register. Decrementing AAC to $00 permanently disables the corresponding key set and permanently renders the corresponding user zone(s) under protection inaccessible. Activating encryption is similar in process to activating authentication with the exception that the session encryption key replaces the secret seed. The process uses the verify encryption variant of the Verify Crypto command (see Table 7-1, "Atmel CryptoMemory Synchronous Command Set," or Table 9-2, "Atmel CryptoMemory Asynchronous Command Set"). Figure 5-3. Encryption Activation Process from Active Authentication Mode CryptoMemory Device Command/Communications Session Key, Cryptogram Compute Challenge A Session Key, Cryptogram Generate Random Number Verify Encryption Verify Challenge A Compute Challenge B Enable Encryption 5.1.4 Host Logic Compute Challenge A Compute Challenge B Read Config Zone Read Challenge B Verify Challenge B Encrypted Checksum CryptoMemory implements a data validity check function in the form of an encrypted checksum. This checksum provides a bi-directional data integrity check and data origin authentication capability in the form of a Message Authentication Code (MAC): only the host/device that carried out a valid authentication is capable of computing a valid MAC. When writing data to the CryptoMemory device in authentication or encryption communication modes, the host must send a valid checksum immediately following the write command. If the checksum is invalid, the device rejects the write command and resets the device security privileges. The host must reinitiate entry into authentication and, if applicable, encryption modes to continue. The use of checksum is optional when reading data. Calls to the Read Checksum command resets device security so its use is recommended only at the completion of all data read operations from the device. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 19 5.2 Data Protection Features Security operations control access to data stored in CryptoMemory. After gaining access, additional options exist to protect data in the user memory. 5.2.1 Modify Forbidden The Modify Forbidden option renders the user zone read-only by restricting all write operations to it. It is recommended to program all required data in the user zone prior to enabling this option. Modify Forbidden is available for any user zone and is selectable by configuring appropriate access registers. 5.2.2 Program Only The Program Only option constrains data bit modification to programming from Logic 1 to Logic 0 only. Data bits may never change from Logic 0 to Logic 1. Program Only is available for any user zone and is selectable by configuring appropriate access registers. 5.2.3 Write Lock The Write Lock option provides ability to render individual bytes within a user zone read-only by restricting all write operations to it. It operates on 8-byte page level whereby the lowest addressed byte of the page serves as the Write Access Control byte for that page. Table 5-2 shows the use of Write Lock for data at addresses $080 thru $087. The byte at $080 controls write access to bytes from $080 to $087. Table 5-2. Write Lock Example Address $0 $1 $2 $3 $4 $5 $6 $7 $080 11011001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx Locked Locked Locked The Write Lock option also applies to the Access Control byte for each page by writing its least significant (rightmost) bit to Logic 0. Moreover, only logic modifications from Logic 1 to Logic 0 of the access control byte are permissible. Write Lock is available for any user zone and is selectable by configuring appropriate access registers; furthermore, configuring a user zone with the Write Lock option restricts writing to that zone to a byte at a time. Attempts to write several bytes within a command result in writing only the first byte. 5.2.4 Anti-tearing (Power Loss Protection) In the event of a power loss during a write cycle, the integrity of the device's stored data may be recovered. This function is optional, and the host may choose to activate the anti-tearing function for any write to a user zone or configuration memory by use of the appropriate B4 system write command. When anti-tearing is active, write commands will take longer to execute since more write cycles are required. Additionally, the data written is limited to 8-bytes. Data is written first to a Buffer zone in EEPROM instead of the intended destination address in the User zone or Configuration Memory, but with the same access conditions. If this write cycle is interrupted the original data remains intact in the User zone or Configuration Memory. The data is then written in the required memory location. If this second write cycle is interrupted the device will automatically recover the data from the system Buffer zone at the next power-up and write it to the intended destination address. In 2-Wire mode, the host is required to perform ACK polling for 18ms after each write command when anti-tearing is active. At power-up, five clock cycles are required to check the anti-tearing flags. In the event the device needs to carry out the data recovery process the host is required to perform ACK polling for 14ms. 20 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 5.3 Configuration Memory Values This section describes each individual field in the Configuration Memory. 5.3.1 Default Values Atmel programs certain fields of the Configuration Memory at the factory. The customer may elect to change the content of all of these fields except for the lot history code field which is permanently locked. Atmel programs the remainder of the fields, including all of the Configuration Memory and user zones to ones prior to releasing the device from the factory. Table 5-3 summarizes device fields Atmel programs at the factory. A brief description of each field follows. Table 5-3. 5.3.2 Factory Programmed Fields Fab Code Lot History code Write 7 Password (Secure Code) 3B B2 11 00 10 80 00 01 10 10 Variable, locked DD 42 97 Atmel AT88SC0204C 3B B2 11 00 10 80 00 02 20 20 Variable, locked E5 47 47 Atmel AT88SC0404C 3B B2 11 00 10 80 00 04 40 40 Variable, locked 60 57 34 Atmel AT88SC0808C 3B B2 11 00 10 80 00 08 80 60 Variable, locked 22 E8 3F Atmel AT88SC1616C 3B B2 11 00 10 80 00 16 16 80 Variable, locked 20 0C E0 Atmel AT88SC3216C 3B B3 11 00 00 00 00 32 32 10 Variable, locked CB 28 50 Atmel AT88SC6416C 3B B3 11 00 00 00 00 64 64 40 Variable, locked F7 62 0B Atmel AT88SC12816C 3B B3 11 00 00 00 01 28 28 60 Variable, locked 22 EF 67 Atmel AT88SC25616C 3B B3 11 00 00 00 02 56 58 60 Variable, locked 17 C3 3A Device ATR Atmel AT88SC0104C Answer To Reset (ATR) This is an 8-byte wide register with content that Atmel defines. This register is read/write accessible prior to blowing the FAB fuse, but becomes read-only after blowing the fuse. 5.3.3 FAB Code This field is a 16-bit wide register with content that Atmel defines. This field is read/write accessible prior to blowing the FAB fuse, but becomes read-only after blowing the fuse. 5.3.4 Memory Test Zone (MTZ) This field is a 16-bit wide register with open read/write access privileges at all times for testing basic communication to the device. This field is free of all security constraints at all times. 5.3.5 Card Manufacturer Code This field is a 32-bit wide register with read/write access privileges for the customer to define its content. The content of this field becomes read-only after blowing the PER fuse. 5.3.6 Lot History Code This field is a 64-bit wide register with content that Atmel defines. This field is read-only. 5.3.7 Issuer Code This field is a 128-bit wide register with read/write access privileges for customer to define its content. The content of this field becomes read-only after blowing the PER fuse. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 21 5.3.8 Device Configuration Register (DCR) This 8-bit register allows selection of the following device configuration options (active low). The values programmed have an immediate effect on the logic of the device. The default value is one for each bit. Table 5-4. Device Configuration Register (DCR) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 SME UCR UAT ETA CS3 CS2 CS1 CS0 5.3.8.1 SME - Supervisor Mode Enable Asserting this bit (SME = 0) enables supervisor mode for Write 7 Password such that verifying Write 7 Password grants read and write accesses to all password sets and PACs. Verifying Write 7 Password does not grant access to other passwords when this bit is not asserted (SME = 1). 5.3.8.2 UCR - Unlimited Checksum Reads Asserting this bit (UCR = 0) allows unlimited number of checksum reads without requiring a new authentication. Not asserting this bit (UCR = 1) limits the read of checksum to one attempt after which the device resets the crypto algorithm after executing the Read Checksum command. 5.3.8.3 UAT - Unlimited Authentication Trials Asserting this bit (UAT = 0) disables the Authentication Attempts Counter (AAC) thus allowing unlimited authentication attempts. The AAC decrements after each unsuccessful attempt but the internal logic ignores it value. Asserting this bit also prevents reset of the crypto algorithm after reading the MAC in encryption mode. The UAT bit does not affect the password attempts counter. 5.3.8.4 ETA - Eight Trials Allowed Asserting this bit (ETA = 0) extends the trials limit to eight incorrect attempts to authenticate or verify a password. The counter (AAC or PAC) will decrement ($FF, $FE, $FC, $F8, $F0, $E0, $C0, $80, $00) with each incorrect attempt. Disabling this bit (ETA = 1) limits authentication and password verification trials to only four incorrect attempts ($FF, $EE, $CC, $88, $00). 5.3.8.5 CS0 - CS3: Programmable Chip Select (Only relevant in synchronous protocol) The four most significant bits (b4 - b7) of every command comprise the Chip Select Address. All CryptoMemory devices will respond to the default chip select address of $B (1011). Each device also responds to a second chip select address programmed into CS0 - CS3 of the device configuration register. By programming each device to a unique chip select address, it is possible to connect up to 15 devices on the same serial data bus and communicate individually to each. Global communications to all devices sharing the bus is accomplished using the default Chip Select Address $B. 5.3.9 Access Registers Four, eight, or sixteen 8-bit access registers allow personalization of the device. Each access register works in conjunction with a password/key register to define the security settings for each individual zone of the user memory. Values in the access registers take immediate effect after programming. The default value for each bit is one. Table 5-5. 22 Access Register Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 PM1 PM0 AM1 AM0 ER WLM MDF PGO AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 5.3.9.2 PM(1:0) Password Mode Table 5-6. Password Mode PM0 PM1 Access 1 1 No Password Required 1 0 Write Password Required 0 * Read and Write Passwords Required When PM = 11, the user zone under protection requires no password. When PM = 10, the zone requires write password verification for writing and reading is free. When PM = 01 or 00, reading requires the read password verification and writing requires write password verification; however, proper verification of the write password also grants read access. The password set required is specified by PW(3:0) in the corresponding passwords/keys register (see following section). Verification of the write password also allows modification of the read and the write passwords, for each password set. 5.3.9.3 AM(1:0) - Authentication Mode Table 5-7. Authentication Mode AM1 AM0 Access 1 1 No Authentication Required 1 0 Authentication for Write 0 1 Normal Authentication Mode 0 0 Dual Access Mode When AM = 11, the user zone under protection requires no authentication. When AM = 10, the zone requires authentication only for write accesses and read accesses are free. When AM = 01, the zone requires authentication for both write and read accesses. In both of these configurations, the Authentication Key (AK) in the corresponding passwords/keys register specifies the required secret seed and corresponding cryptogram, and when applicable the session encryption key (see Section 6, Protocol Selection). Finally, when AM = 00, the dual access mode is active in which authentication using the Program Only Key (POK) gives a right to read and program the zone (i.e. write zeros only), while authentication using the Authentication Key (AK) gives full read and write access to the zone. In this way, a token application may be implemented, whereby regular hosts with knowledge of POK may decrement the stored value, and only master hosts with knowledge of AK may reset the token to its full value. See the following Section 6 on the passwords/keys register for further definition of POK and AK. Notes: 1. When AM = 00, the POK bits in the corresponding password/key register are ignored 2. When AM = 00 and PGO = 0; bits in the zone may not be written to one even when using the AK 3. Requiring authentication automatically requires the use of secure checksums for write operations (See "Encrypted Checksum") 5.3.9.4 ER - Encryption Required When ER = 0, the host is required to activate the encryption mode in order to read/write the corresponding user zone. No data read from or written to the zone may be transmitted in the clear. If ER = 1, the host may activate the encryption mode, but isn't specifically required to do so by the device. 5.3.9.5 WLM - Write Lock Mode Asserting this bit (WLM = 0) divides the user zone into 8-byte pages. The first byte of each page becomes the Write Lock byte and defines the locked/unlocked status for each byte in the page. Write access is forbidden to a byte if its associated bit in the Write Lock byte is set to zero. Bit 7 controls byte 7; bit 6 controls byte 6, etc. By setting bit 0 to zero locks the Write Lock byte itself. Enabling Write Lock mode limits write operations to one byte at a time. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 23 5.3.9.6 MDF - Modify Forbidden Asserting this bit (MDF = "0") renders the user zone read-only at all times. The user zone must, therefore, be programmed before setting this bit to "0" 5.3.9.7 PGO - Program Only Asserting this bit (PGO = 0) allows changing of data within the user zone under protection from one to zero and never from zero to one. 5.3.10 Password/Key Registers Four, eight or sixteen 8-bit Password/Key registers receive definition during device personalization. Each Password/Key register works in conjunction with a corresponding Access register to define the security settings of each zone. The values programmed have an immediate effect on the logic of the device. The default value is one for each bit. Bit 3 is reserved and should be left as value one. Table 5-8. Password/Key Register Definition Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 AK1 AK0 POK1 POK0 Res PW2 PW1 PW0 5.3.10.1 AK(1:0) - Authentication Key These bits define which of the four secret seeds G0-G3 must be used in an authentication to allow access to the user zone if authentication is selected in the corresponding access register. Each access register may point to a unique authentication secret, or access registers for multiple zones may point to the same authentication secret. In this case authentication with a single secret seed will open several zones. 5.3.10.2 POK(1:0) - Program Only Key When the user zone has the dual access mode selected (AM = 00), these bits define which of the four secret seeds G0-G3 must be used in an authentication to allow read and program (i.e. write zeros only) access to the user zone. 5.3.10.3 PW(2:0) - Password Set These bits define which of the eight password sets must be presented to allow access to the user zone when the password mode is selected. 5.3.11 Identification Number A 56-bit number the customer defines during personalization. It is recommended that a unique identification number be assigned to each device. 5.3.12 Cryptograms (C0 - C3) Each of these fields contains a 56-bit cryptogram for use during authentication. The internal logic modifies the cryptogram each time it successfully verifies the authentication. The customer may program an initial value for the cryptogram during personalization. It is recommended that the initial values be diversified or random. 5.3.13 Session Keys (S0 - S3) Each of these fields contains a 64-bit session key for use during encryption. The internal logic modifies the session key each time it successfully processes authentication or encryption verification. The session keys do not require initial values and thus programming of initial values is not necessary. 24 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 5.3.14 Secret Seeds (G0-G3) Each of these fields contains a 64-bit secret seed that is used in conjunction with the corresponding cryptogram and session key during the authentication and encryption sequences. The customer programs the secret seeds during device personalization. 5.3.15 Password Sets The password fields contain eight sets of two 24-bit passwords for read and write operations. The customer defines the values of these passwords during personalization. Successfully verifying the write password allows modification of the read and the write passwords of the same set. 5.3.16 Secure Code The secure code is the Write 7 Password. Properly presenting this password grants write access to the configuration memory during personalization. Atmel defines the initial value of the secure code but the customer may change these values after successful presentation during a verify Write 7 Password operation. Table 5-3 shows the secure codes for the various devices as they leave the Atmel factory. After blowing the PER fuse, verifying Write 7 Password no longer grant write access to the configuration memory, and the configuration memory becomes read-only thereafter. 5.3.17 Password Attempts Counters (PAC) Each of the sixteen PAC fields contains an 8-bit attempts counter for the verify password process. Each PAC corresponds to a password. The attempts counter limits the number of incorrect consecutive presentations of the corresponding password to four, after which it locks the password from future use. The PAC will decrement ($FF, $EE, $CC, $88, $00) with each incorrect attempt to present the password. The PAC permanently locks the corresponding password once its value reaches $00. Prior to reaching $00, any correct presentation of the password resets the PAC value to $FF. 5.3.18 Authentication Attempts Counters (AAC) Each of the four AAC fields contains an 8-bit attempt counter for the authentication process. Each AAC field corresponds to each authentication key set. The attempts counter limits the number of incorrect consecutive attempts to authenticate to four, after which it locks the authentication key set from future use. The AAC will decrement ($FF, $EE, $CC, $88, $00) with each incorrect attempt to authenticate. The AAC permanently locks the corresponding key set once its value reaches $00. Prior to reaching $00, any correct attempt to authenticate resets the AAC value to $FF. 5.4 Security Fuses CryptoMemory uses four fuses. The status of these fuses is given in a `fuse byte.' A value of zero indicates the fuse has been blown. Bits 4 to 7 of this byte are not used as security fuses and are reserved for Atmel use. Table 5-9. Device Fuses F7 F6 F5 F4 F3 F2 F1 F0 Resv Resv Resv Resv SEC PER CMA FAB The bits SEC, PER, CMA, and FAB are non-volatile fuses blown at the end of various steps in the manufacturing and personalization process. Once blown, these fuses can never be reset. Atmel blows the SEC fuse to lock the lot history code before the device leaves the factory. Blowing the remainder of the fuses must follow the sequence: FAB To lock the answer to reset and the FAB Code portions of the Configuration Memory. CMA To lock the card manufacturer code of the Configuration Memory. PER To lock the remainder of the Configuration Memory. Any attempt to blow a fuse out of sequence will be unsuccessful. Table 5-10 provides a summary of access rights for all portions of the memory for each fuse condition. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 25 Table 5-10. Fuse Access Rights Summary Fuse Zone Operation FAB = 0 CMA = 0 PER = 0 Identification (Except MTZ and CMC) Read Free Free Free Free Write Secure Code Forbidden Forbidden Forbidden Memory Test Zone (MTZ) Read Free Free Free Free Card Manufacturer Code (CMC) Read Free Free Free Free Write Secure Code Secure Code Forbidden Forbidden Read Only (Lot History Code) Read Free Free Free Free Write Forbidden Forbidden Forbidden Forbidden Read Free Free Free Free Write Secure Code Secure Code Secure Code Forbidden Cryptography (Except Encryption Keys S) Read Free Free Free Free Write Secure Code Secure Code Secure Code Forbidden Encryption Keys (S) Read Secure Code Secure Code Secure Code Forbidden Secure Code Secure Code Secure Code Forbidden Secure Code Secure Code Secure Code Write PW Read Free Free Free Free Write Secure Code Secure Code Secure Code Write PW Forbidden Forbidden Forbidden Forbidden AR AR AR AR Access Control Write Write Read Passwords Write Password Attempts Counters (PAC) Read Forbidden Write Read User Zones Notes: Write Read Secret 26 SEC = 0 Write 1. AR: Access rights are defined by the access registers. 2. PW: Password. 3. Secure Code: Write 7 Password is the secure code until the PER fuse is blown. 4. Forbidden: No access is permitted. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 6. Protocol Selection CryptoMemory supports two application areas with different communication protocols: 2-Wire Serial Communication for Embedded Applications ISO 7816 Asynchronous T=0 Smart Card Interface The power-up sequence of CryptoMemory determines what mode it shall operate in. A brief description of each of these modes follows. 6.1 Synchronous Mode for Embedded Applications The 2-Wire serial interface is used for fast and efficient communication with logic and controllers. The synchronous mode is the default after powering up VCC due to the internal and/or external pull-up on RST. For embedded applications using CryptoMemory in standard plastic packages RST is not bonded out and this is the only communication protocol. Power-up VCC, RST goes high, After stable VCC, apply five pulses CLK-SCL, CLK-SCL and I/O-SDA may then be driven. Figure 6-1. Asynchronous Mode Vcc I/O-SDA RST CLK-SCL 1 2 3 4 5 The asynchronous mode is selected when RST is low on a rising edge of CLK. Once the Asynchronous mode has been selected, it is not possible to return to the Synchronous mode other than by powering the device off and on again. 6.2 Asynchronous Mode for Smart Card Applications The Asynchronous T=0 Protocol defined by ISO 7816-3 is used for compatibility with the industry standard smart card readers. Selecting this mode requires the following power-up sequence which complies with ISO 7816-3 for a cold reset in smart card applications. Power up VCC; RST, IO-SDA and CLK-SCL are low, Set I/O-SDA in Receive mode, Provide a clock signal to CLK-SCL, RST goes high after 400 clock cycles. The device will respond with a 64-bit ATR code including historical bytes to indicate the memory density within the CryptoMemory family. The 64-bit ATR code comes from a register which contains the characters shown in Table 6-1 and Table 6-2. The historical bytes (T1, T2, T3) show the density of the CryptoMemory device. This register may be modified during personalization but is locked when the PER fuse is blown. Care must be taken to respect the applicable standards defining the ATR value if operating in asynchronous mode. The CryptoMemory device will always output all 8-bytes in response to the Asynchronous ATR command regardless of the contents of the register. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 27 Table 6-1. ATR Codes for Lower Density Atmel CryptoMemory Device TS T0 TA(1) TB(1) TD(1) TA(2) T1 T2 AT88SC0104C $3B $B2 $11 $00 $10 $80 $00 $01 AT88SC0204C $3B $B2 $11 $00 $10 $80 $00 $02 AT88SC0404C $3B $B2 $11 $00 $10 $80 $00 $04 AT88SC0808C $3B $B2 $11 $00 $10 $80 $00 $08 AT88SC1616C $3B $B2 $11 $00 $10 $80 $00 $16 Table 6-2. ATR Codes for Higher Density Atmel CryptoMemory Device TS T0 TA(1) TB(1) TD(1) T1 T2 T3 AT88SC3216C $3B $B3 $11 $00 $00 $00 $00 $32 AT88SC6416C $3B $B3 $11 $00 $00 $00 $00 $64 AT88SC12816C $3B $B3 $11 $00 $00 $00 $01 $28 AT88SC25616C $3B $B3 $11 $00 $00 $00 $02 $56 Once the Asynchronous mode has been selected, it is not possible to switch to the synchronous mode without powering off the device. Figure 6-2. Power-Up Sequence for Smart Card Mode Vcc I/O-SDA ATR RST CLK-SCL After a successful ATR, the Protocol and Parameter Selection (PPS) protocol defined by ISO 7816-3 may be used to negotiate the communications speed with CryptoMemory devices 32Kb and larger in user memory. CryptoMemory supports D values of 1, 2, 4, 8, 12, and 16 for an F value of 372. CryptoMemory also supports D values of 8 and 16 for F = 512. This allows selection of eight communications speeds ranging from 9,600 baud to 153,600 baud. Smart card applications that support the 2-Wire protocol can also use CryptoMemory in the Synchronous mode. 28 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 7. Synchronous Protocol Communication with the CryptoMemory using the synchronous protocol is very similar to communication with Atmel AT24Cxxx Serial EEPROM devices using a 2-Wire protocol (TWI). Basic command structure and timing are the same; however, a significant difference exists when reading the CryptoMemory device which is described below. 7.1 Start-up Sequence When first powering up the device, five pulses are required on CLK-SCL for reading of internal registers. This can be accomplished by sending one full command byte to the device. The device will not respond but will then be ready to respond to the next correct command sequence. Power-up VCC, External pull-up resistor pulls I/O-SDA high with VCC, After stable VCC, five pulses are applied to CLK-SCL, CLK-SCL and I/O-SDA may be driven. Figure 7-1. Start-up Sequence Vcc I/O-SDA CLK-SCL 1 2 3 4 5 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 29 7.2 Command Set The command set of CryptoMemory is expanded compared to a Serial EEPROM as the functionality of CryptoMemory exceeds that of a simple memory device. Each instruction sent to the CryptoMemory must have four bytes: Command Address 1 Address 2 N The last byte, N, defines the number of any additional data bytes to be sent or received from the CryptoMemory device. Table 7-1. Atmel CryptoMemory Synchronous Command Set Command Description Command ADDR 1 ADDR 2 Normal ADDR ADDR N $10 N-bytes $B0 ADDR ADDR N $40 N-bytes $B0 ADDR ADDR N $80 N-bytes $B0 ADDR ADDR N $08 N-bytes $B2 ADDR ADDR N $B4 $00 ADDR N $10 N-bytes $B4 $00 ADDR N $40 N-bytes $B4 $00 ADDR N $80 N-bytes Write Fuses $B4 $01 Fuse ID $00 Send Checksum $B4 $02 $00 $02 Set User Zone $B4 $03 Zone $00 Write Config Zone with Anti-Tearing $B4 $08 ADDR Set User Zone with Anti-Tearing $B4 $0B Zone $00 Read Conifg Zone $B6 $00 ADDR N Read Fuse Byte $B6 $01 $00 $01 Read Checksum $B6 $02 $00 $02 Verify Authentication $B8 $0X $00 $10 Normal Write User Zone (AT88SC3216C, AT88SC6416C) Normal (AT88SC12816C, AT88SC25616C) With Anti-Tearing (All Devices) Read User Zone Write Config Zone (AT88SC0104C-AT88SC1616C) Write Config Zone (AT88SC3216C, AT88SC6416C) Write Config Zone System Read Data (N) $B0 (AT88SC0104C-AT88SC1616C) System Write N (AT88SC12816C, AT88SC25616C) 2-bytes N $08 N-bytes 8-random bytes + 8 challenge bytes X= key set (0-3) Verify Crypto Verify Encryption $B8 $1X $00 $10 8-random bytes + 8-challenge bytes X= key set (0-3) 3-byte password Write Password $BA $0X $00 $03 Read Password $BA $1X $00 $03 Verify Password 30 X=password set (0-7) 3-byte password AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 X=password set (0-7) 7.3 Command Format Most CryptoMemory commands have the same format as a 2-Wire Interface (TWI) Write command. The TWI Write command is characterized by a zero in the LSB of the first byte (device address). The numbers of word address bytes in a TWI Write command will vary depending on the size of the memory being addressed. All bytes whether part of the command or data are generated by the host and sent to the memory device that will acknowledge each byte. Figure 7-2. TWI Write Command S T A R T Device Address Word Address 1 Word Address 2 N Data Data X N xxxx xxx0 xxxx xxxx xxxx xxxx xxxx xxxx d7--- ---d0 d7--- ---d0 A C K A C K A C K A C K A C K S T O P A C K All CryptoMemory commands will have a zero for the LSB of the first byte. All CryptoMemory commands will have 4-bytes used for defining the command and addressing the memory. All but the CryptoMemory read commands will send an additional 0- to 128-bytes of data following the four command bytes. These commands comply with the format of a TWI Write command. The CryptoMemory Read commands (Read User Zone, System Read) do not comply with the format of a TWI Write or Read command. The CryptoMemory Read command looks like a TWI Write command (LSB of the first byte = 0) but after the fourth byte of the command the CryptoMemory device will begin to send data back on the bus. The number of bytes sent by CryptoMemory will be equal to the value of N. Figure 7-3. CryptoMemory Read Command S T A R T Command Address 1 xxxx 0x10 Address 2 xxxx xxxx A C K N xxxx xxxx A C K xxxx xxxx A C K NS AT CO KP A C K A C K d7--- ---d0 d7--- ---d0 Data Data x N The response of CryptoMemory will cause contention with the host on a standard TWI bus. Typically CryptoMemory cannot be used on a standard TWI bus but requires a modified TWI protocol to account for the unique read command format. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 31 7.4 Acknowledge Polling Each command is ended with a stop condition. Certain commands are required to be followed by an acknowledge polling sequence. Acknowledge polling consists of sending a start condition followed by the command byte and determining if the device responded with an ACK. If the device is not ready for the command it will not acknowledge and the sequence must be repeated (start condition, command byte, check for ACK). The ACK indicates the operation has completed but gives no indication of the success or failure of the command. Read Commands: No ACK polling required Write Commands: ACK polling required except encrypted write commands. Any command may be used Set commands: No ACK polling required Verify commands: ACK polling required with B2 or B6 commands only The following table lists the specific requirements for ACK polling and the maximum expected delay before the device will ACK indicating readiness for the next command. Table 7-2. Minimum Delay for ACK Polling for each Command Command Description Normal Normal with Anti-Tearing Write User Zone Encrypted Encrypted with Anti-Tearing System Read Verify Crypto Verify Password Note: 32 Addr 1 Addr 2 N ACK Polling CMD Delay $B0 addr addr N Required, any CMD 5ms N Required, any CMD 20ms N No, Send Checksum 0 No, Send Checksum 0 $B0 $B0 addr addr addr addr $B0 addr addr N $B2 addr addr N Write Config Zone $B4 addr addr N Required, any CMD 5ms Write Fuses $B4 $00 fuse ID $00 Required, any CMD 5ms Send Checksum $B4 $01 $00 $02 Required, any CMD 5ms Send Checksum with Anti-Tearing $B4 $02 $00 $02 Required, any CMD 20ms Set User Zone $B4 $03 zone $00 Not Required Write Config Zone with Anti-Tearing $B4 $08 addr N Set User Zone with Anti-Tearing $B4 $0B zone $00 Not Required 0 Read Config Zone $B6 $00 addr N Not Required 0 Read Fuse Byte $B6 $01 $00 $01 Not Required 0 Verify Authentication $B8 $0X $00 $10 Required; B2 or B6 only 10ms Verify Encryption $B8 $1X $00 $10 Required; B2 or B6 only 10ms Write Password $BA $0X $00 $01 Required; B2 or B6 only 10ms Read Password $BA $1X $00 $03 Required; B2 or B6 only 10ms Read User Zone System Write Command Not Required Required, any CMD Delays are based on operation at 25 C. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 0 0 20ms 7.5 Device Addressing The first nibble of the command byte corresponds to the device address. All CryptoMemory devices will respond to the device address $B. A specific device may be set to respond to another value ($0 to $F) in addition to $B by setting this value in the second nibble of the Device Configuration Register (DCR) in the configuration memory. The DCR is set to $FF at the Atmel factory and thus will respond to device address $B and $F unless the DCR is modified. For a device to respond only to $B the DCR should be set to $B also. 7.6 Command Descriptions In the following section operations are described in two parts: the instruction is described first from a functional point of view (parameters and data exchanged), after which they are detailed for the synchronous 2-Wire protocol. In these diagrams, values are shown in binary format with bits to the left transmitted first, i.e. bytes are transmitted most significant bit first. 7.6.1 Write User Zone: $B0 7.6.1.1 Functional Figure 7-4. Write User Zone Command Functional Description Host Device Command Address 1 Address 2 Number of bytes N Data N data bytes ... Data The Write User Zone command $B0 allows writing of data in the device's currently selected user zone (the procedure for selecting a user zone is described in Section 7.6.3, System WRITE: $B4). The data byte address to be written is defined by Address 1 and Address 2 in the command. The value N defines how many bytes to write. The maximum number of bytes that may be written is as follows; $10 forAT88SC0104C through AT88SC1616C (EEPROM page size of 16-bytes) $40 for AT88SC3216C and AT88SC6416C (EEPROM page size of 64-bytes) $80 for AT88SC12816C and AT88SC25616C (EEPROM page size of 128-bytes) In anti-tearing mode the maximum value for N is $08 for all devices. A write in anti-tearing mode is activated with the set user zone with anti-tearing command; all subsequent writes to the user zone will be in anti-tearing mode. A write may be started in the middle of an EEPROM page but should not extend past the end of the page. If the host is not allowed to write in the zone, the device will not acknowledge the N-byte. After this command the host must perform ACK polling unless operating in the encrypted mode, then this command must be followed by the send Checksum command. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 33 Figure 7-5. Write User Zone S T A R T Command Address 1 1011 0000 xxxx xxxx A C K 7.6.2 Address 2 N xxxx xxxx A C K xxxx xxxx A C K Data Data x N d7--- ---d0 d7--- ---d0 A C K A C K S T O P A C K Read User Zone: $B2 7.6.2.1 Functional Figure 7-6. Read User Zone Command Functional Description Host Device Read Command Address 1 Address 2 Number of bytes N Data ... N data bytes Data The Read User Zone command $B2 allows reading of data from the device's currently selected user zone (the procedure for selecting a user zone is described below under Section 7.6.3, System WRITE: $B4). The data byte address to be read is defined by Address 1 and Address 2 in the command and is internally incremented following the transmission of each data byte. The value N defines how many bytes CryptoMemory will read, a value of zero will result in 256-bytes read. The host may cease clocking the device and end the transmission with a NACK and stop at any time prior to receiving all N-bytes. During a read operation the address will roll-over from the last byte of the current zone to the first byte of the same zone. If the host is not allowed to read the zone, the device will not acknowledge the N-byte. Figure 7-7. Read User Zone S T A R T Command Address 1 1011 0010 xxxx xxxx A C K 34 Address 2 N xxxx xxxx A C K xxxx xxxx A C K NS AT CO KP A C K A C K d7--- ---d0 d7--- ---d0 Data Data x N AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 7.6.3 System WRITE: $B4 7.6.3.1 Functional Figure 7-8. System Write Command Functional Description Host Device Command Address 1 Address 2 Number of bytes N Data N data bytes ... Data The System Write command allows writing of system data to the device. Depending on the value of the Address 1 parameter, the host may write data in the Configuration Memory, program the fuses, or set the user zone. Table 7-3. System Write Command Detail Command Description Command Addr 1 Addr 2 N Data (N) Write Config Zone AT88SC0104C-AT88SC1616C) $B4 $00 ADDR N $10 N-bytes Write Config Zone AT88SC3216C-AT88SC6416C) $B4 $00 ADDR N $40 N-bytes Write Config Zone AT88SC12816C-AT88SC25616C) $B4 $00 ADDR N $80 N-bytes Write Fuses $B4 $01 Fuse ID $00 Send Checksum $B4 $02 $00 $02 Set User Zone $B4 $03 Zone $00 2-bytes 7.6.3.2 Write Config Zone The maximum number of bytes that may be written is as follows: $10 for AT88SC0104C through AT88SC1616C (EEPROM page size of 16-bytes). $40 for AT88SC3216C and AT88SC6416C (EEPROM page size of 64-bytes). $80 for AT88SC12816C and AT88SC25616C (EEPROM page size of 128-bytes). In anti-tearing mode the maximum value for N is $08 for all devices. A write may be started in the middle of an EEPROM page but should not extend past the end of the page. If the address provided is an unauthorized address, the device will not write the requested data. Since access rights vary throughout the configuration memory, the host may provide an authorized starting address, but a number of bytes that causes the device to reach unauthorized data. In this case, the device will prevent the internal write cycle and no bytes will be written in the EEPROM. After this command the host must perform ACK polling. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 35 7.6.3.3 Write Fuses The fuses may only be programmed which is written from one to zero. The write fuses operation is allowed only after successfully presenting the secure code (Write 7 Password). The fuses must be blown sequentially: FAB must be blown first, CMA may be blown only if FAB is zero, and PER only if CMA is zero. After this command the host must perform ACK polling. Table 7-4. Fuse Writing Fuse Fuse ID FAB $06 CMA $04 PER $00 7.6.3.4 Send Checksum To write data to user zones that require authentication for write access (AM [1:0] = 00 or 10 in the access register), the host should first carry out the write command $B0. At this point the memory is unchanged and the device is waiting for the host to provide a valid checksum before initiating the write cycle. The host sends the checksum it has computed using the system write command with Address 1 = $02. Only if the checksum is valid will the device initiate the write cycle; furthermore, if the device receives an incorrect checksum, it will clear the authentication privilege. After this command the host must perform ACK polling. 7.6.3.5 Set User Zone Before reading and writing data in the user zones, the host must select a zone with this command. At this time the host chooses whether anti-tearing should be active for this zone. Table 7-5. Anti-Tearing Command Description Command Addr 1 Addr 2 N Data (N) Write Config Zone with anti-tearing $B4 $08 ADDR N $08 N-bytes Set User Zone with anti-tearing $B4 $0B Zone $00 Data written to the Configuration Memory may be done with anti-tearing enabled by setting Address 1 to $08 of the write Configuration Zone command. To enable anti-tearing for writes to a user zone a set user zone command is executed with Address 1 set to $0B. All subsequent write user zone commands will be executed with anti-tearing enabled until the next set user zone command. Anti-tearing should be turned off if not required, as it would otherwise cause more write cycles than necessary. Figure 7-9. System Write S T A R T Command Address 1 1011 0100 0000 xxxx A C K 36 Address 2 N xxxx xxxx A C K xxxx xxxx A C K A C K Data Data x N d7--- ---d0 d7--- ---d0 A C K AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 S T O P A C K 7.6.4 System Read: $B6 7.6.4.1 Functional Figure 7-10. System Read Command Functional Description Host Device Read Command Address 1 Address 2 Number of bytes N Data ... N data bytes Data The system read command allows reading of system data from the device. Depending on the value of Address 1, the host may read the data in the configuration memory, the fuses or a checksum. Table 7-6. System Read Command Detail Command Description Command ADDR 1 ADDR 2 N Read Config Zone $B6 $00 addr N Read Fuse Byte $B6 $01 $00 $01 Read Checksum $B6 $02 $00 $02 7.6.4.2 Read Config Zone The data byte address to be read is defined by Address 2 in the command and is internally incremented following the transmission of each data byte. The value N defines how many bytes CryptoMemory will read, a value of zero will result in 256-bytes read. If the address provided is an unauthorized address, the device will not ACK the N-byte and will not return any data. Since access rights vary throughout the configuration memory, the host may provide an authorized starting address and a number of bytes N that causes the device to reach unauthorized address. In this case the device will transmit the fuse byte (see below) in place of unauthorized bytes. 7.6.4.3 Read Fuse Byte Fuse data is returned in the form of a single byte. Bits zero to three represent the fuse state. A value of `0' indicates the fuse has been blown. Bits four to seven are not used as security fuses and are reserved by Atmel. Table 7-7. Fuse Byte Definition F7 F6 F5 F4 F3 F2 F1 F0 resv resv resv resv SEC PER CMA FAB AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 37 7.6.4.4 Read Checksum The checksum consists of 2-bytes, and the Read Checksum command must be sent with parameter N = 2. Figure 7-11. System Read S T A R T Command Address 1 1011 0110 0000 xxxx A C K 38 Address 2 N xxxx xxxx A C K xxxx xxxx A C K NS AT CO KP A C K A C K d7--- ---d0 d7--- ---d0 Data Data x N AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 7.6.5 Verify Crypto: $B8 7.6.5.1 Functional Figure 7-12. Verify Crypto Command Functional Description Host Device Command Key Index Q1 Q2 Q3 Q4 8-random bytes Q5 Q6 Q7 Q8 CH1 CH2 CH3 CH4 8-challenge bytes CH5 CH6 CH7 CH8 When the device receives the Verify Crypto command, it computes a challenge based on the received random number, Q, the internally stored associated cryptogram, Ci, and secret seed, Gi (or session encryption key, Si). The device also decrements the associated attempts counter. It then compares the computed challenge with the challenge sent by the host. If the challenges match, the device computes and writes a new Ci and Si. The device utilizes the success or failure information of the authentication process and updates the attempts counter accordingly. Key index: b0000_00nn : Secret Seed G0-G3 b0001_00nn : Session Encryption Key S0-S3 Data: Q : Host random number, 8 bytes CH : Host challenge, 8 bytes AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 39 Figure 7-13. Verify Crypto S T A R T Command Key Index 1011 1000 Parameter 2 000e 00nn A C K N=16 xxxx xxxx A C K Data x 16 0001 0000 A C K S T O P d7--- ---d0 A C K A C K Once the sequence has been carried out, the device requires the host to perform an ACK polling with either the read user zone $B2 command or system read $B6 command. To verify whether the authentication succeeded, the host could either read the associated attempts counter to confirm the value is $FF, or read the post authentication cryptogram from the device and compare with the cryptogram generated when the host computed the challenge bytes. 40 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 Verify Password: $BA 7.6.5.2 Functional Figure 7-14. Verify Password Command Functional Description Host Device Command Password Index PW1 8-password bytes PW2 PW3 Read password indices: $10 to $17 for passwords 0 to 7. Write password indices: $00 to $07 for passwords 0 to 7. Secure code index: $07 (equivalent to Write 7 Password). Four password index bits "r" and "ppp" indicate the password to compare: r = 0 : Write password r = 1 : Read password p2p1p0: Password set number Figure 7-15. Verify Password S T A R T Command PW Index 1011 1010 Parameter 2 000r 0p2p1p0 A C K N=3 xxxx xxxx A C K Data x 3 0000 0011 A C K S T O P d7--- ---d0 A C K A C K Once the sequence has been carried out, the device requires the host to perform an ACK polling sequence with the system read command $B6. In order to know whether the inserted password was correct, the host can read the corresponding password attempts counter and verify the value is $FF. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 41 8. Initialization Example The first step in initializing CryptoMemory is to determine what data is to be stored in the device and what the security settings need to be to protect this data. Once defined the proper settings for CryptoMemory registers can be determined and values for passwords and keys may be selected. To initialize the CryptoMemory device the following sequence is recommended to take place in a secure location to protect sensitive data, passwords and keys that may be loaded into the device. 8.1 Write Data to User Zones In the Atmel default configuration, all user zones have free access rights. Writing initial data into the user zones should be done before setting security configurations. Use the Set User Zone command and Write User Zone command to write initial data into the user zones. The Read User Zone command may be used to verify the data written. 8.2 Unlock the Configuration Memory Before any data can be written to the Configuration Memory, it must be unlocked by presenting the correct security code (Write 7 Password). Use the Verify Password command with the proper secure code supplied by Atmel to unlock the Configuration Memory. Use the Read Config Zone command to read back the security code at address $E9 for verification that the Configuration Memory has been unlocked. 8.3 Write Data to the Configuration Memory Writing this data is accomplished by performing the Write Config Zone command at the appropriate address location. The Read Config Zone command may be used to verify the data written. As soon as values are written to the registers, keys, and passwords, they become effective in determining the security of the user zones. 8.4 Set Security Fuses Once all data is written and verified into user zones and the Configuration Memory the security fuses should be set before the device is released from the secure location used for device initialization. There are three fuses, FAB, CMA and PER that must be set. These three fuses must be set in the order listed (FAB, then CMA, then PER). The Write Fuse command is used to set each of the three fuses individually. The Read Fuse command may be used to check the status of all three fuses. Once all fuses have been set the Read Fuse command should return a value of zero for the second nibble of the fuse byte. The AT88SC0104C is used for this example. A small pattern is written into each of the four user zones. Security for each of the four user zones and the associated register values are shown in the table below. Simple values for codes, keys, and passwords are used. Table 8-1. 42 Example Zones Configuration User Zone Data 0 Zone 0 1 Security Requirements Access Register Password/Key Register None $FF $FF Zone 1 Read/Write Password (Set 1) $7F $F9 2 Zone 2 Read/Write Authentication (Set 2) $DF $BF 3 Zone 3 Read/Write Password (Set 1), Read/Write Authentication (Set 2) with Encryption Required $57 $B9 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 The following shows the 2-Wire commands sent to the CryptoMemory device for the purpose of initializing the device. The flow is consistent with the steps described above, comments have been added as indicated with an asterisk (*). *Atmel AT88SC0104C Initialization Example *WRITE DATA TO USER ZONES *Set User Zone 0 B4 03 00 00 *Write data = Zone 0 Data B0 00 00 0B 5A 6F 6E 65 20 30 20 44 61 74 61 *Set User Zone 1 B4 03 01 00 *Write data = Zone 1 Data B0 00 00 0B 5A 6F 6E 65 20 31 20 44 61 74 61 *Set User Zone 2 B4 03 02 00 *Write data = Zone 2 Data B0 00 00 0B 5A 6F 6E 65 20 32 20 44 61 74 61 *Set User Zone 3 B4 03 03 00 *Write data = Zone 3 Data B0 00 00 0B 5A 6F 6E 65 20 33 20 44 61 74 61 *UNLOCK CONFIGURATION MEMORY BA 07 00 03 DD 42 97 *WRITE CODES IN CONFIGURATION MEMORY *Write Card Mfg Code = P001 B4 00 0B 04 50 30 30 31 *Write Identification Number = 00000000012345 B4 00 19 07 00 00 00 00 01 23 45 *Write Issuer Code = STATION 035 B4 00 40 10 53 54 41 54 49 4F 4E 20 30 33 35 00 00 00 00 00 *WRITE REGISTERS IN CONFIGURATION MEMORY *Write Registers AR1/PR1 = 7F F9, AR2/PR2 = DF BF, AR3/PR3 = 57 B9 B4 00 22 06 7F F9 DF BF 57 B9 *WRITE KEYS IN CONFIGURATION MEMORY *Write Ci for set 2 = 22222222222222 B4 00 71 07 22 22 22 22 22 22 22 *Write Gc for set 2 = 5B4F9AE4B5098BE7 B4 00 A0 08 5B 4F 9A E4 B5 09 8B E7 *WRITE PASSWORDS IN CONFIGURATION MEMORY *Write Passwords, read 7 = 10 00 01, write 7 = 11 00 11 B4 00 B9 07 11 00 11 FF 10 00 01 *READ ENTIRE CONFIGURATION MEMORY TO VERIFY B6 00 00 F0 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 43 *Device Response: 3B B2 11 00 10 80 8C AD A8 10 0A AB FF FF 7F F9 DF BF FF FF FF FF FF FF 53 54 41 54 49 4F FF FF FF FF FF FF FF FF FF FF FF FF FF 22 22 22 22 22 FF FF FF FF FF FF FF FF FF FF FF FF 5B 4F 9A E4 B5 09 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 00 FF 57 FF 4E FF FF 22 FF FF 8B FF FF FF FF 01 FF B9 FF 20 FF FF 22 FF FF E7 FF FF FF FF 10 FB FF FF 30 FF FF FF FF FF D8 FF FF FF FF 10 00 FF FF 33 FF FF FF FF FF FF 11 FF FF FF FF 00 FF FF 35 FF FF FF FF FF FF 00 FF FF FF 50 00 FF FF 00 FF FF FF FF FF FF 11 FF FF FF 30 00 FF FF 00 FF FF FF FF FF FF FF FF FF FF 30 01 FF FF 00 FF FF FF FF FF FF 10 FF FF FF 31 23 FF FF 00 FF FF FF FF FF FF 00 FF FF FF FF 45 FF FF 00 FF FF FF FF FF FF 01 FF FF FF *SET SECURITY FUSES *Set FAB Fuse B4 01 06 00 *Set CMA Fuse B4 01 04 00 *Set PER Fuse B4 01 00 00 *Read Fuse Byte = X0 B6 01 00 01 *Device Response: 00 44 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 9. Asynchronous T=0 Protocol 9.1 Character Format CryptoMemory complies with the asynchronous T=0 protocol defined in ISO 7816-3. The character format is shown in the following figure. Figure 9-1. Character Format 8 data bits Z Start bit I/O Parity bit d0 d1 d2 d3 d4 d5 d6 d7 p Next Start bit Guard Time A 0 t1 tn t 10 (n 0,2) etu Note: The byte is transmitted with the least significant bit first Even parity is used: the parity bit is such that the overall sum of bits in the data byte and the parity bit is an even number. If a transmission error is detected, the receiving device indicates this by applying a low level on the I/O channel during the guard time. This tells the transmitting device to retransmit the byte. 9.2 Command format The command sequence is as follows: 1. In compliance with ISO 7816-3, the host must send the header consisting of five characters: CLA, INS, P1, P2, P3 CLA refers to a class of instructions. This byte isn't tested by the device. INS is the instruction byte. P1 and P2 are reference bytes, such as a data byte address or password index. 2. 3. 4. Note: P3 is the number of data bytes transferred during the command. For outgoing transfers (e.g. read commands), P3 = 0 means that 256-data bytes will be emitted by the card. For incoming commands, P3 = 0 means that no data bytes will be transferred. The device replies with a "procedure byte" normally equal to the INS code received. If a problem occurred, then the device will respond with a status word pair SW1-SW2, indicating the end of the command. Data transfer (P3-bytes). A final SW1-SW2 sequence gives the status of the device after completion of the command. A normal completion is indicated by SW1-SW2 = $90-$00. For all bytes transmitted by the device or by the host, including header, procedure, status and data bytes, if a parity error is detected, the receiver requests that byte to be sent again (see character format). AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 45 9.3 PPS Support All CryptoMemory devices with user memory size 32Kb and larger support the Protocol and Parameter Selection (PPS) protocol, Section 7 of ISO 7816-3. This section only applies to these larger devices; CryptoMemory devices with memory sizes 16-Kbit or smaller do not support PPS. At the end of an ATR sequence, subsequent to either a cold or a warm reset initiated by the reader, the device will be expecting either a `Class' byte as part of a command header, or the initial character, PPSS, of a PPS request. If the device receives a byte = $FF, it will process subsequent incoming bytes as a PPS request. In all other cases, it will proceed with command processing. There are four bytes that comprise a PPS request or response: Initial Character PPSS. Always equal to $FF. Format Character PPS0. CryptoMemory supports two response values for PPS0, $00 and $01. See ISO 7816 for further definition of PPS0. Parameter Character PPS1. Encodes Fn and Dn in the same manner as TA(1) in the ATR. Checksum PCK. The following table shows the PPS1 values supported by CryptoMemory devices with memory sizes 32Kb and above. Table 9-1. Dl 0001b 0010b 0011b 0100b 0101b 1000b 46 PPS1 Values Atmel CryptoMemory Supports Dl 1 2 4 8 16 12 f Max 4MHz 5MHz 5MHz Fl 0000b 0001b 1001b Fl 372 372 372 PPS1 01 11 F/D 372 372 baud rate 9600 9600 PPS1 02 12 F/D 186 186 baud rate 19200 19200 PPS1 03 13 F/D 93 93 baud rate 38400 38400 PPS1 04 14 94 F/D 46.5 46.5 64 baud rate 76800 76800 55800 PPS1 05 15 95 F/D 23.25 23.25 32 baud rate 153600 153600 111600 PPS1 08 18 F/D 31 31 baud rate 115200 115200 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 After the ATR, the reader will have the choice of proceeding with commands using default values of F=372 and D=1 (9600-baud at 3.5712MHz), or negotiating values Fn and Dn through a PPS exchange. The following are four examples of PPS requests and responses: Example: We assume CryptoMemory ATR contains the byte TA(1) = 15h, indicating that it is capable of using F=372 and D=16, leading to a baud rate of 153,600-baud at 3.5712MHz. Assuming that this is the maximum speed supported by the device, the reader immediately attempts to set the F and D parameters leading to these values. PPS_request= $FF $10 $15 $FA PPS_response = $FF $10 $15 $FA The newly negotiated values are effective immediately following this exchange, so that the ETU, or duration of one bit on I/O, will now be 23 clock cycles instead of 372. Example: Example: The reader insists on negotiating Fn and Dn equal to the default values, even though these would be used by default without the use of a PPS exchange. The two ways of doing this are by sending PPS1_request = $11 or not sending PPS1_request at all. PPS_request = $FF $10 $11 $FE PPS_request = $FF $00 $FF PPS_response = $FF $00 $FF The reader attempts to negotiate values that are not supported by the CryptoMemory device. In its response, the CryptoMemory proposes to continue with F and D, by not sending PPS1_response. Even though new Fn and Dn values aren't negotiated, this scenario is still considered a "successful" exchange according to ISO 7816. Example: PPS_response = $FF $10 $11 $FE or PPS_request = $FF $10 $45 $AA PPS_response = $FF $00 $FF If the reader attempts to change the protocol to any protocol other than T = 0, such as T = 1, the CryptoMemory will indicate that it only supports T = 0. PPS_request = $FF $01 $FE PPS_response = $FF $00 $FF CryptoMemory will only operate at baud rates above the default 9600 baud through a successful PPS exchange. CryptoMemory cannot be set to higher baud rates through use of a TA(2)-byte in the ATR. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 47 9.4 Command Set Table 9-2. Atmel CryptoMemory Asynchronous Command Set Command Description B0 B2 Write User Zone CLA INS P1 P2 P3 Data (N) Normal (0104C-1616C) $00 $B0 ADDR ADDR N $10 N-bytes Normal (3216C, 6416C) $00 $B0 ADDR ADDR N $40 N-bytes Normal (12816C, 25616C) $00 $B0 ADDR ADDR N $80 N-bytes with anti-tearing (all devices) $00 $B0 ADDR ADDR N $08 N-bytes $00 $B2 ADDR ADDR N $00 $B4 $00 ADDR N $10 N-bytes $00 $B4 $00 ADDR N $40 N-bytes $00 $B4 $00 ADDR N $80 N-bytes Write Fuses $00 $B4 $01 Fuse ID $00 Send Checksum $00 $B4 $02 $00 $02 Set User Zone $00 $B4 $03 Zone $00 Write Config Zone w/a-t $00 $B4 $08 ADDR N $08 Set User Zone w/a-t $00 $B4 $0B Zone $00 Read Config Zone $00 $B6 $00 ADDR N Read Fuse Byte $00 $B6 $01 $00 $01 Read Checksum $00 $B6 $02 $00 $02 Verify Authentication $00 $B8 $0X $00 $10 Read User Zone Write Config Zone (Devices 0104C-1616C) Write Config Zone (Devices 3216C, 6416C) Write Config Zone B4 B6 B8 BA 48 System Write System Read Verify Crypto Verify Password (Devices 12816C, 25616C) 2-bytes N-bytes 8-random bytes + 8-challenge bytes X=key set (0-3) Verify Encryption $00 $B8 $1X $00 $10 8-random bytes + 8-challenge bytes X=key set (0-3) Write Password $00 $BA $0X $00 $03 3-byte password X=password set (0-7) Read Password $00 $BA $1X $00 $03 3-byte password X=password set (0-7) AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 9.4.1 Status Words Table 9-3. Atmel CryptoMemory Asynchronous Mode Status Words SW1 SW2 Meaning $62 $00 The memory is unchanged (waiting for checksum). $67 $00 The length is incorrect. $69 $00 The command is unauthorized. $6B $00 The address is incorrect. $6D $00 The instruction code is invalid. $90 $00 The command was successfully executed. These status words indicate the state of the device at the end of the command. In normal conditions, the device sends the INS byte as the procedure byte, and $90 $00 as the final status word. In certain conditions described below, the device may interrupt the command by returning a status word in place of INS as the procedure byte. $62 $00 is returned as a status word after a write command when the device is waiting for the host to send a secure checksum before initiating the write cycle. This will happen only in authentication mode and encryption mode. $67 $00 is returned as a procedure byte when the number of data bytes to be transferred is incorrect. $69 $00 is returned after read/write commands as procedure bytes if the host is not allowed to read/write at the address provided. It is also returned after password and authentication commands if the maximum number of attempts has been reached. The device will return $69 $00 as a final status word in place of $90 $00, if the password presentation, authentication or encryption activation failed due to invalid data, or if any incoming command failed due to a bad checksum (MAC). $6B $00 is returned as procedure bytes if the address is incorrect. $6D $00 is returned as procedure bytes if the INS code received is not supported. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 49 9.4.2 Example: Write EEPROM Command The following illustrates the data exchanges that occur during a WRITE Operation of 4-bytes: $04, $09, $19, $97 to addresses $02, $03, $04, $05 in the current user zone. Start Host Device Val CLA ** INS $B0 P1 ** P2 $02 Address byte A2 = $02 P3 $04 4-data bytes $B0 Device responds with INS code Data $04 Byte to be written at start address $02 Data $09 Byte to be written at address $03 Data $19 Byte to be written at address $04 Data $97 Byte to be written at address $05 INS Write Cycle Finish 50 Note Class (ignored by Atmel CryptoMemory) Write Instruction Address byte A1 (ignored by 0104C - 1616C) ~5ms SW1 90 SW2 $00 Write Operation Successful AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 9.4.3 Write User Zone: $B0 9.4.3.1 Functional Figure 9-2. Write User Zone Command Functional Description Host Device Command Address A1 Address A2 Number of bytes N Data N data bytes ... Data The write user zone command $B0 allows writing of data into the device's currently selected user zone (the procedure for selecting a user zone is described in Section 9.4.5, System Write: $B4) The maximum number of bytes that may be written is as follows; $10 for AT88SC0104C through AT88SC1616C (EEPROM page size of 16-bytes) $40 for AT88SC3216C and AT88SC6416C (EEPROM page size of 64-bytes) $80 for AT88SC12816C and AT88SC25616C (EEPROM page size of-128 bytes) Each data byte within a page must only be loaded once. In anti-tearing mode the maximum value for N is $08 for all devices. A write in anti-tearing mode is activated with the set user zone with anti-tearing command (00 B4 0B zz 00); all subsequent writes to the user zone will be in anti-tearing mode. If the host is not allowed to write in the zone, the device will return the "Command Unauthorized" code ($69 $00) after it has received the P3 byte. Table 9-4. Write User Zone Write User Zone Command Data Sent CLA INS : Command P1 : Address 1 P2 : Address 2 P3 : N Data(1) ... Data(N) ** $B0 0000 0000 0a6-- ---a0 000n4 --- n0 d7--- ---d0 ... d7--- ---d0 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 51 9.4.4 Read User Zone: $B2 9.4.4.1 Functional Figure 9-3. Read User Zone Command Functional Description Host Device Read Command Address A1 Address A2 Number of bytes N Data ... N data bytes Data The Read User Zone command $B2 allows reading of data from the device's currently selected user zone (the procedure for selecting a user zone is described below under Section 9.4.5, System Write: $B4). The byte address is internally incremented following the transmission of each data byte. During a read operation the address will roll-over from the last byte of the current zone, to the first byte of the same zone. If the host is not allowed to read the zone, the device will return the Command Unauthorized code ($69 $00) after it has received the header. Table 9-5. Read User Zone User Read 52 Data Returned CLA INS : Command P1 : Address 1 P2 : Address 2 P3 : N Data(1) ... Data(N) ** $B2 0000 0000 0a6-- ---a0 N7 --- n0 d7--- ---d0 ... d7--- ---d0 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 9.4.5 System Write: $B4 9.4.5.1 Functional Figure 9-4. System Write Command Functional Description Host Device Command Address P1 Address P2 Number of bytes N Data N data bytes ... Data The system write command allows writing of system data to the device. Depending on the value of the P1 parameter, the host may write data in the Configuration Memory, program the fuses, send a checksum, or set the user zone. Table 9-6. System Write Command Detail Command CLA INS P1 P2 P3 Data(N) $00 $B4 $00 ADDR N $10 N-bytes $00 $B4 $00 ADDR N $40 N-bytes $00 $B4 $00 ADDR N $80 N-bytes Write Fuses $00 $B4 $01 Fuse ID $00 Send Checksum $00 $B4 $02 $00 $02 Set User Zone $00 $B4 $03 Zone $00 Write Config Zone (Devices 0104C-1616C) Write Config Zone (Devices 3216C-6416C) Write Config Zone (Devices12816C-25616C) 2-bytes The anti-tearing function is controlled by P1: the host may choose to write in the configuration memory with anti-tearing enabled by setting P1 = $08 instead of $00. Similarly, the host may choose to activate anti-tearing for a user zone by carrying out the set user zone command with P1 = $0B instead of $03. All subsequent write user zone commands are then carried out with anti-tearing enabled until the next Set User Zone command. Anti-tearing should be turned off if not required, as it would otherwise cause more write cycles than necessary. Table 9-7. Anti-tearing Command Description CLA INS P1 P2 P3 Data(N) Write Config Zone w/ a-t $00 $B4 $08 ADDR N $08 N-bytes Set User Zone w/ a-t $00 $B4 $0B Zone $00 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 53 9.4.5.2 Write Config Zone The maximum number of bytes that may be written is as follows: $10 for AT88SC0104C through AT88SC1616C (EEPROM page size of 16-bytes). $40 for AT88SC3216C and AT88SC6416C (EEPROM page size of 64-bytes). $80 for AT88SC12816C and AT88SC25616C (EEPROM page size of 128-bytes). Each data byte within a page must only be loaded once. In anti-tearing mode the maximum value for N is $08 for all devices. If the address provided at P2 is an unauthorized address, the device will return the Command Unauthorized code ($69 $00) after it has received the header. Since access rights vary throughout the Configuration Memory, the host may provide an authorized starting address, but a number of bytes that causes the device to reach unauthorized address. In this case, the device will prevent the internal write cycle and no bytes will be written in the EEPROM. At the end of the command the Command Unauthorized code ($69 $00) will be returned instead of $90 $00 to indicate that no write cycle occurred. 9.4.5.3 Write Fuses The fuses may only be programmed, that is written from one to zero. The write fuses operation is only allowed after successfully presenting the secure code (Write 7 Password). The fuses must be blown sequentially: FAB must be blown first, CMA may be blown only if FAB is zero, and PER only if CMA is zero. Table 9-8. 9.4.6 Fuse Writing Fuse Fuse ID FAB $06 CMA $04 PER $00 Send Checksum To write data to user zones that require authentication for write access (AM [1:0] = 01 or 00 in the access register), the host should first carry out the write user zone command $B0, after which the device will return a special status word: $62 $00. This indicates the memory is unchanged and the device is waiting for the host to provide a valid checksum before initiating the write cycle. The host sends the checksum it has computed using the System Write command opcode $B4 with P1 = $02. Only if the checksum is valid will the device initiate the write cycle; furthermore, if the device receives an incorrect checksum, it will clear the authentication privilege. 9.4.6.1 Set User Zone Before reading and writing data in the user zones, the host should select a zone with this command. At this time the host may choose whether anti-tearing should be active for this zone. Table 9-9. System Write User Read 54 Data Returned CLA INS : Command P1 P2 P3 Data(1) ... Data(N) ** $B4 p7 --- p0 p7 --- p0 n7 --- n0 d7--- ---d0 ... d7--- ---d0 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 9.4.7 System READ: $B6 9.4.7.1 Functional Figure 9-5. System READ Command Functional Description Host Device Read Command Address P1 Address P2 Number of bytes N Data ... N data bytes Data The System Read command allows reading of the system data from the device. Depending on the value of the P1 parameter, the host may read the data in the Configuration Memory, the fuses, or a checksum. Table 9-10. System Read Command Detail Command CLA INS P1 P2 P3 Read Config Zone $00 $B6 $00 ADDR N Read Fuse Byte $00 $B6 $01 $00 $01 Read Checksum $00 $B6 $02 $00 $02 9.4.7.2 Read Config Zone To read 256-bytes, the host should set N = $00. This is true for any outgoing command, and is defined by ISO 7816-3. If the address provided at P2 is an unauthorized address, the device will return the Command Unauthorized code ($69 $00) after it has received the header. Since access rights vary throughout the Configuration Memory, the host may provide an authorized starting address, but a number of bytes N that causes the device to reach unauthorized address. In this case, the device will transmit the authorized bytes, but unauthorized bytes will be replaced by the fuse byte (see below). At the end of this command, the Command Unauthorized code ($69 $00) will be returned instead of $90 $00 to indicate that some of the bytes returned were not valid. 9.4.7.3 Read Fuse Byte Fuse data is returned in the form of a single byte. Bits zero to three represent the fuse states; a value of zero indicates the fuse has been blown. Bits four to seven are not used as security fuses and are reserved by Atmel. Table 9-11. Fuse Byte Definition F7 F6 F5 F4 F3 F2 F1 F0 resv resv resv resv SEC PER CMA FAB AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 55 9.4.7.4 Read Checksum The checksum consists of 2-bytes, and the Read Checksum command must be sent with parameter P3 = 2. Table 9-12. System Read System Read 56 Data Returned CLA INS : Command P1 P2 P3 Data(1) ... Data(N) ** $B6 p7 --- p0 p7 --- p0 n7 --- n0 d7--- ---d0 ... d7--- ---d0 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 9.4.8 Verify Crypto: $B8 9.4.8.1 Functional Figure 9-6. Verify Crypto Command Functional Description Host Device Command Key Index Q1 Q2 Q3 Q4 8-random bytes Q5 Q6 Q7 Q8 CH1 CH2 CH3 CH4 8-challenge bytes CH5 CH6 CH7 CH8 When the device receives the Verify Crypto command, it computes a challenge based on the received random number, Q, the internally stored associated cryptogram, Ci, and secret seed, Gi (or session encryption key, Si). The device also increments the associated attempts counter. It then compares the computed challenge with the challenge sent by the host. If the challenges match, the device computes and writes a new Ci and Si. The device utilizes the success or failure information of the authentication process and updates the authentication attempts counter accordingly. Key index: b0000_00nn : Secret Seed G0-G3 b0001_00nn : Session Encryption Key S0-S3 Data : Q : Host random number, 8-bytes CH : Host challenge, 8-bytes AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 57 Table 9-13. Verify Crypto Verify Crypto Data Sent CLA INS : Command P1 P2 P3 Q1 Q8 CH1 CH8 ** $B8 000e 00nn ** $10 d7--- ---d0 d63--- ---d56 d7--- ---d0 d63--- ---d56 The device increments the associated attempts counter each time prior to verifying the challenge, to prevent attacks. If the authentication succeeds, the device memorizes this success, clears the attempts counter and returns $90 $00. If the authentication fails, the device simply returns $69 $00. If the maximum number of trials has been exceeded, the device will return $69 $00 instead of the INS code, after receiving the header, to indicate the command is unauthorized. 58 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 9.4.9 Verify Password: $BA 9.4.9.1 Functional Figure 9-7. Verify Command Functional Description Host Device Command Password Index PW1 8-password bytes PW2 PW3 Read password indices: $10 to $17 for passwords 0 to 7. Write password indices: $00 to $07 for passwords 0 to 7. Secure code index: $07 (equivalent to Write 7 Password). Four password index bits "r" and "ppp" indicate the password to compare: r = 0: Write password r = 1: Read password p2p1p0: Password set number Table 9-14. Verify Password Verify Password Data Sent CLA INS : Command P1 P2 P3 PW1 PW2 PW3 ** $BA 000r 0p2p1p0 ** $30 d7--- ---d0 d15--- ---d8 d23--- ---d16 If the maximum number of trials has been exceeded, the device will return $69 $00 instead of the INS code, after receiving the header, to indicate the command is unauthorized. The device decrements the associated password attempts counter before verifying the password, to prevent attacks. If the password is correct, the device memorizes this success, clears the attempts counter and returns $90 $00. If the password is wrong, the device simply returns $69 $00 after decrementing the attempts count. The Write 7 Password is also known as the Secure Code and must be properly presented before write access to the configuration memory is granted when personalizing the device. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 59 10. Initialization Example The first step in initializing CryptoMemory is to determine what data is to be stored in the device and what the security settings need to be to protect this data. Once defined, determine the proper settings for CryptoMemory registers and select values for passwords. To initialize the CryptoMemory device, the following sequence is recommended to take place in a secure location to protect sensitive data and passwords that may be loaded into the device. 10.1 Write Data to User Zones In Atmel default configuration form, all user zones have free access rights. Writing initial data into the user zones should be done before setting security configurations. Use the Set User Zone command and Write User Zone command to write initial data into the user zones. The Read User Zone command may be used to verify the data written. 10.2 Unlock the Configuration Memory Before any data can be written to the Configuration Memory, it must be unlocked by presenting the correct security code (Write 7 Password). Use the Verify Password command with the proper secure code supplied by Atmel to unlock the Configuration Memory. Use the Read Config Zone command to read back the security code at address $E9 for verification that the Configuration Memory has been unlocked. 10.3 Write Data to the Configuration Memory Writing this data is accomplished by performing the Write Config Zone command at the appropriate address location. The Read Config Zone command may be used to verify the data written. As soon as values are written to the registers, keys, and passwords, they become effective in determining the security of the user zones. 10.4 Set Security Fuses Once all data is written and verified into user zones and the Configuration Memory, the security fuses should be set before the device is released from the secure location used for device initialization. There are three fuses, FAB, CMA and PER which must be set. These three fuses must be set in the order listed (FAB, then CMA, then PER). The write fuse command is used to set each of the three fuses individually. The Read Fuse command may be used to check the status of all three fuses. Once all fuses have been set, the Read Fuse command should return a value of zero for the second nibble of the fuse byte. AT88SC0104C is used for this example. A small pattern is written into the first four user zones. Security for each of these four user zones and the associated register values are shown in the table below. Simple values for passwords are used. Table 10-1. Zone Configuration Example 60 User Zone Data 0 Zone 0 1 Security Requirements Access Register Password/Key Register None $FF $FF Zone 1 Read/Write Password (Set 1) $7F $F9 2 Zone 2 Read/Write Authentication (Set 2) $DF $BF 3 Zone 3 Read/Write Password (Set 1), Read/Write Authentication (Set 2) with Encryption Required $57 $B9 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 The following shows the TPDU commands sent to the CryptoMemory device for the purpose of initializing the device. The flow is consistent with the steps described above; comments have been added as indicated with an asterisk (*). *Atmel AT88SC0104C Initialization Example *WRITE DATA TO USER ZONES *Set User Zone 0 00 B4 03 00 00 *Write data = Zone 0 Data 00 B0 00 00 0B 5A 6F 6E 65 20 30 20 44 61 74 61 *Set User Zone 1 00 B4 03 01 00 *Write data = Zone 1 Data 00 B0 00 00 0B 5A 6F 6E 65 20 31 20 44 61 74 61 *Set User Zone 2 00 B4 03 02 00 *Write data = Zone 2 Data 00 B0 00 00 0B 5A 6F 6E 65 20 32 20 44 61 74 61 *Set User Zone 3 00 B4 03 03 00 *Write data = Zone 3 Data 00 B0 00 00 0B 5A 6F 6E 65 20 33 20 44 61 74 61 *UNLOCK CONFIGURATION MEMORY 00 BA 07 00 03 DD 42 97 *WRITE CODES IN CONFIGURATION MEMORY *Write Card Mfg Code = P001 00 B4 00 0B 04 50 30 30 31 *Write Identification Number = 00000000012345 00 B4 00 19 07 00 00 00 00 01 23 45 *Write Issuer Code = STATION 035 00 B4 00 40 10 53 54 41 54 49 4F 4E 20 30 33 35 00 00 00 00 00 *WRITE REGISTERS IN CONFIGURATION MEMORY *Write Registers AR1/PR1 = 7F F9, AR2/PR2 = DF BF, AR3/PR3 = 57 B9 00 B4 00 22 06 7F F9 DF BF 57 B9 *WRITE KEYS IN CONFIGURATION MEMORY *Write Ci for set 2 = 22222222222222 00 B4 00 71 07 22 22 22 22 22 22 22 *Write Gc for set 2 = 5B4F9AE4B5098BE7 00 B4 00 A0 08 5B 4F 9A E4 B5 09 8B E7 *WRITE PASSWORDS IN CONFIGURATION MEMORY *Write Passwords, read 7 = 10 00 01, write 7 = 11 00 11 00 B4 00 B9 07 11 00 11 FF 10 00 01 *READ ENTIRE CONFIGURATION MEMORY TO VERIFY 00 B6 00 00 F0 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 61 *Device Response: 3B B2 11 00 10 80 8C AD A8 10 0A AB FF FF 7F F9 DF BF FF FF FF FF FF FF 53 54 41 54 49 4F FF FF FF FF FF FF FF FF FF FF FF FF FF 22 22 22 22 22 FF FF FF FF FF FF FF FF FF FF FF FF 5B 4F 9A E4 B5 09 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 00 FF 57 FF 4E FF FF 22 FF FF 8B FF FF FF FF 01 FF B9 FF 20 FF FF 22 FF FF E7 FF FF FF FF 10 FB FF FF 30 FF FF FF FF FF D8 FF FF FF FF 10 00 FF FF 33 FF FF FF FF FF FF 11 FF FF FF FF 00 FF FF 35 FF FF FF FF FF FF 00 FF FF FF 50 00 FF FF 00 FF FF FF FF FF FF 11 FF FF FF 30 00 FF FF 00 FF FF FF FF FF FF FF FF FF FF 30 01 FF FF 00 FF FF FF FF FF FF 10 FF FF FF 31 23 FF FF 00 FF FF FF FF FF FF 00 FF FF FF FF 45 FF FF 00 FF FF FF FF FF FF 01 FF FF FF *SET SECURITY FUSES *Set FAB Fuse 00 B4 01 06 00 *Set CMA Fuse 00 B4 01 04 00 *Set PER Fuse 00 B4 01 00 00 *Read Fuse Byte = X0 00 B6 01 00 01 *Device Response: 00 90 00 power_off 62 AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 11. Absolute Maximum Ratings* Operating temperature.................... -40C to +85C Storage temperature ................... -65C to + 150C Voltage on any pin with respect to ground ...............- 0.7 to VCC +0.7V Maximum operating voltage ................................ 6V DC output current ............................................ 5mA 11.1 *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 of time may affect device reliability. DC and AC Characteristics Table 11-1. DC Characteristics Applicable over recommended operating range from VCC = +2.7 to 5.5V, TAC = -40C to +85C (unless otherwise noted) Symbol Parameter Max Units VCC Supply Voltage 5.5 V ICC Supply Current (VCC = 5.5V) Async Read at 3.57MHz 5 mA ICC Supply Current (VCC = 5.5V) Async Write at 3.57MHz 5 mA ICC Supply Current (VCC = 5.5V) Synch Read at 1MHz 5 mA ICC Supply Current (VCC = 5.5V) Synch Write at 1MHz 5 mA ISB Standby Current (VCC = 5.5V) VIN = VCC or GND 100 A 0 VCC x 0.2 V 0 VCC x 0.2 V 0 VCC x 0.2 V VCC x 0.7 VCC V VCC x 0.7 VCC V VCC x 0.7 VCC V VIL Test Condition 2.7 SDA/IO Input Low VIL Clock Input Low VIL RST Input Low VIH Voltage(1) Voltage(1) Voltage(1) SDA/IO Input High VIH Min Voltage(1) SCL/CLK Input High Voltage(1) Voltage(1) Typ VIH RST Input High IIL SDA/IO Input Low Current 0 < VIL < VCC x 0.15 15 A IIL SCL/CLK Input Low Current 0 < VIL < VCC x 0.15 15 A IIL RST Input Low Current 0 < VIL < VCC x 0.15 50 A IIH SDA/IO Input High Current VCC x 0.7 < VIH < VCC 20 A IIH SCL/CLK Input High Current VCC x 0.7 < VIH < VCC 100 A IIH RST Input High Voltage VCC x 0.7 < VIH < VCC 150 A VOH SDA/IO Output High Voltage 20K ohm external pull-up VCC x 0.7 VCC V VOL SDA/IO Output Low Voltage IOL = 1mA 0 VCC x 0.15 V IOH SDA/IO Output High Current VOH 20 A Note: 1. VIL min and VIH max are reference only and are not tested. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 63 Table 11-2. AC Characteristics Applicable over recommended operating range from VCC = +2.7 to 5.5V, TAC = -40C to +85C (unless otherwise noted) 64 Symbol Parameter Min Max Units fCLK Async Clock Frequency (VCC range: +4.5 - 5.5V) 1 5 MHz fCLK Async Clock Frequency (VCC range: +2.7 - 3.3V) 1 4 MHz fCLK Synch Clock Frequency 0 1 MHz Clock Duty cycle 40 60 % tR Rise Time - SDA/IO, RST 1 s tF Fall Time - SDA/IO, RST 1 s tR Rise Time - SCL/CLK 9% x period s tF Fall Time - SCL/CLK 9% x period s tAA Clock Low to Data Out Valid 35 s tHD.STA Start Hold Time 200 ns tSU.STA Start Set-up Time 200 ns tHD.DAT Data In Hold Time 10 ns tSU.DAT Data In Set-up Time 100 ns tSU.STO Stop Set-up Time 200 ns tDH Data Out Hold Time 20 ns tWR Write Cycle Time (at 25 C) 5 ms tWR Write Cycle Time 7 ms AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 11.2 Timing Diagrams for Synchronous Communications Figure 11-1. Bus Timing tHIGH tF tR tLOW SCL tSU.STA tLOW tHD.STA tHD.DAT tSU.DAT tSU.STO SDA IN tAA tDH tBUF SDA OUT Figure 11-2. Write Cycle Timing SCL SDA 8th BIT ACK WORDn (1) tWR STOP CONDITION Note: START CONDITION The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the internal clear/write cycle AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 65 Figure 11-3. Data Validity Figure 11-4. Start and Stop Definition Figure 11-5. Output Acknowledge 1 SCL 8 9 DATA IN DATA OUT START 66 ACKNOWLEDGE AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 12. DC Tamper Detection Limits The CryptoMemory device family incorporates several tamper detection circuits to prohibit operation outside the limits of reliable circuit operation. 12.1 High Voltage and Low Voltage Limit If VCC is taken below or above these voltage limits the device will enter a reset sequence once VCC is returned to normal levels and before the device operation can begin again. 12.2 Minimum Clock Pulse In synchronous operation if the clock pulse width falls below the limit of this circuit the device will enter a reset sequence. 12.3 Maximum Clock Frequency In asynchronous operation if the clock frequency exceeds the limit of this circuit the device will enter a reset sequence. 12.4 Power On Reset (POR) Delay Anytime the device is reset either on initial power up or by a tamper detection circuit, there is a time delay from when normal conditions are restored to when the device may be operated. During this reset sequence all security flags within the device are reset to their initial values. 12.5 Noise Suppression Pulses of short duration on SCL/CLK, SDA/IO, and RST are ignored if they fall below the threshold of this circuit. The pulses are filtered out and the device does not enter the reset sequence. Table 12-1. Tamper Detection Applicable over recommended operating range from TAC = -40 to +85 C (unless otherwise noted). Symbol Parameter VCC High Voltage Limit VCC Low Voltage Limit tCLK Minimum CLK Pulse Width fCLK Minimum CLK Frequency tPOR tSUP Test Condition Min Typ Max Units 6.0 6.5 V 2.0 2.4 V Synchronous Operation 200 280 ns Asynchronous Operation 12 14 MHz POR Delay 10 70 s Min. SCL, SDA, RST Pulse 50 200 ns AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 67 13. Ordering Information Delivery Information Atmel Ordering Code Package Form Quantity Tape and Reel -- Bulk (Tubes) 50 per Tube Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel Bulk (Tubes) 100 per Tube AT88SC6416C-SU-T Tape and Reel 4,000 per Reel AT88SC12816C-SU Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel -- -- AT88SCxxxxC-MJ M2 - J Module - ISO AT88SCxxxxC-MP M2 - P Module - ISO AT88SCxxxxC-MJTG M2 - J Module - TWI AT88SCxxxxC-MPTG M2 - P Module - TWI AT88SCxxxxC-PU 8P3 AT88SC3216C-SU AT88SC3216C-SU-T AT88SC6416C-SU AT88SC12816C-SU-T AT88SC25616C-SU AT88SC25616C-SU-T AT88SC0104C-SH Voltage Range Commercial Temperature (0C to 70C) 2.7V to 5.5V 8S1 AT88SC0104C-SH-T AT88SC0204C-SH AT88SC0204C-SH-T AT88SC0404C-SH AT88SC0404C-SH-T AT88SC0808C-SH AT88SC0808C-SH-T AT88SC1616C-SH AT88SC1616C-SH-T AT88SCxxxxC-WI Note: Green Compliant (Exceeds RoHS) Industrial Temperature (-40C to 85C) Industrial Temperature (-40C to 85C) Ordering Codes are valid for all devices covered by this datasheet. (See P.1 for a complete list) Package Type(1) (2) Description M2 - J Module : ISO or TWI M2 ISO 7816 Smart Card Module M2 - P Module : ISO or TWI M2 ISO 7816 Smart Card Module with Atmel(R) Logo 8P3 8-lead, 0.300" wide, Plastic Dual Inline (PDIP) 8S1 8-lead, 0.150" wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Notes: 68 7 mil wafer Temperature Range 1. Formal drawings may be obtained from an Atmel sales office. 2. Both the J and P module packages are used for either ISO (T=0 / 2-Wire mode) or TWI (2-Wire mode only). AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 14. Package Marking Information 14.1 AT88SC0104C AT88SC0104C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 0104C U YYWW AT88SC 0104C H YMXX @ No Bottom side mark (this package) Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02:Week 2 04:Week 4 ... 52:Week 52 Y = Year 2: 2012 3: 2013 4: 2014 5: 2015 M = Month A = January B = February ... L = December Country of Assembly Lot Number @ = Country of Assembly Marked on Bottom side unless in Injector Mold for PDI P only! Marked on Bottom side for the PDI P only! U: H: Industrial/Matte Tin Industrial/NiPdAu Atmel Truncation AT: Atmel Trace Code XX = Trace Code (Atmel Lot Numbers to Correspond to Code) Example: AA, AB.... YZ, ZZ 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 88SC0104CSM, AT88SC0104C Package Marking Information DRAWING NO. REV. 88SC0104CSM A AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 69 14.2 AT88SC0204C AT88SC0204C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 0204C U YYWW AT88SC 0204C H YMXX @ No Bottom side mark (this package) Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02:Week 2 04:Week 4 ... 52:Week 52 Y = Year 2: 2012 3: 2013 4: 2014 5: 2015 M = Month A = January B = February ... L = December Country of Assembly Lot Number @ = Country of Assembly Marked on Bottom side unless in Injector Mold for PDI P only! Marked on Bottom side for the PDI P only! U: H: Industrial/Matte Tin Industrial/NiPdAu Atmel Truncation AT: Atmel Trace Code XX = Trace Code (Atmel Lot Numbers to Correspond to Code) Example: AA, AB.... YZ, ZZ 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 70 88SC0204CSM, AT88SC0204C Package Marking Information AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 DRAWING NO. REV. 88SC0204CSM A 14.3 AT88SC0404C AT88SC0404C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 0404C U YYWW AT88SC 0404C H YMXX @ No Bottom side mark (this package) Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02:Week 2 04:Week 4 ... 52:Week 52 Y = Year 2: 2012 3: 2013 4: 2014 5: 2015 M = Month A = January B = February ... L = December Country of Assembly Lot Number @ = Country of Assembly Marked on Bottom side unless in Injector Mold for PDI P only! Marked on Bottom side for the PDI P only! U: H: Industrial/Matte Tin Industrial/NiPdAu Atmel Truncation AT: Atmel Trace Code XX = Trace Code (Atmel Lot Numbers to Correspond to Code) Example: AA, AB.... YZ, ZZ 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 88SC0404CSM, AT88SC0404C Package Marking Information DRAWING NO. REV. 88SC0404CSM A AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 71 14.4 AT88SC0808C AT88SC0808C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 0808C U YYWW AT88SC 0808C H YMXX @ No Bottom side mark (this package) Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02:Week 2 04:Week 4 ... 52:Week 52 Y = Year 2: 2012 3: 2013 4: 2014 5: 2015 M = Month A = January B = February ... L = December Country of Assembly Lot Number @ = Country of Assembly Marked on Bottom side unless in Injector Mold for PDI P only! Marked on Bottom side for the PDI P only! U: H: Industrial/Matte Tin Industrial/NiPdAu Atmel Truncation AT: Atmel Trace Code XX = Trace Code (Atmel Lot Numbers to Correspond to Code) Example: AA, AB.... YZ, ZZ 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 72 88SC0808CSM, AT88SC0808C Package Marking Information AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 DRAWING NO. REV. 88SC0808CSM A 14.5 AT88SC1616C AT88SC1616C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 1616C U YYWW AT88SC 1616C H YMXX @ No Bottom side mark (this package) Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02:Week 2 04:Week 4 ... 52:Week 52 Y = Year 2: 2012 3: 2013 4: 2014 5: 2015 M = Month A = January B = February ... L = December Country of Assembly Lot Number @ = Country of Assembly Marked on Bottom side unless in Injector Mold for PDI P only! Marked on Bottom side for the PDI P only! U: H: Industrial/Matte Tin Industrial/NiPdAu Atmel Truncation AT: Atmel Trace Code XX = Trace Code (Atmel Lot Numbers to Correspond to Code) Example: AA, AB.... YZ, ZZ 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 88SC1616CSM, AT88SC1616C Package Marking Information DRAWING NO. REV. 88SC1616CSM A AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 73 14.6 AT88SC3216C AT88SC3216C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 3216C U YYWW AT88SC 3216C U YYWW Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02: Week 2 04: Week 4 ... 52: Week 52 16: 2016 17: 2017 18: 2018 19: 2019 Country of Assembly Lot Number Marked on Bottom side unless in Injector Mold Marked on Bottom side U: Industrial/Matte Tin Atmel Truncation AT: Atmel 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 74 88SC3216CSM, AT88SC3216C Package Marking Information AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 DRAWING NO. REV. 88SC3216CSM A 14.7 AT88SC6416C AT88SC6416C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 6416C U YYWW AT88SC 6416C U YYWW Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02: Week 2 04: Week 4 ... 52: Week 52 16: 2016 17: 2017 18: 2018 19: 2019 Country of Assembly Lot Number Marked on Bottom side unless in Injector Mold Marked on Bottom side U: Industrial/Matte Tin Atmel Truncation AT: Atmel 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 88SC6416CSM, AT88SC6416C Package Marking Information DRAWING NO. REV. 88SC6416CSM A AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 75 14.8 AT88SC12816C AT88SC12816C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 12816C U YYWW AT88SC 12816C U YYWW Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02: Week 2 04: Week 4 ... 52: Week 52 16: 2016 17: 2017 18: 2018 19: 2019 Country of Assembly Lot Number Marked on Bottom side unless in Injector Mold Marked on Bottom side U: Industrial/Matte Tin Atmel Truncation AT: Atmel 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 76 88SC12816CSM, AT88SC12816C Package Marking Information AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 DRAWING NO. REV. 88SC12816CSM A 14.9 AT88SC25616C AT88SC25616C: Package Marking Information 8-lead PDIP 8-lead SOIC AT88SC 25616C U YYWW AT88SC 25616C U YYWW Note 1: designates pin 1 Note 2: Package drawings are not to scale Date Codes YY = Year 12: 2012 13: 2013 14: 2014 15: 2015 Grade/Lead Finish Material WW = Work Week of Assembly 02: Week 2 04: Week 4 ... 52: Week 52 16: 2016 17: 2017 18: 2018 19: 2019 Country of Assembly Lot Number Marked on Bottom side unless in Injector Mold Marked on Bottom side U: Industrial/Matte Tin Atmel Truncation AT: Atmel 3/5/12 TITLE Package Mark Contact: DL-CSO-Assy_eng@atmel.com 88SC25616CSM, AT88SC25616C Package Marking Information DRAWING NO. REV. 88SC25616CSM A AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 77 15. 78 Revision History Doc. Rev. Date Comments 5211F 03/2015 Added JEDEC SOIC tape and reel package options. 5211E 02/2014 Added package marking information and updated Atmel logos and disclaimer page. 5211D 12/2011 Updated template and edited ordering information. 5211C 01/2010 Added MJTG module and added Ordering Information. 5211B 01/2010 Converted to MS Word. 5211A 06/2010 Initial document release. AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet] Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015 Atmel Corporation 1600 Technology Drive, San Jose, CA 95110 USA T: (+1)(408) 441.0311 F: (+1)(408) 436.4200 www.atmel.com (c) 2015 Atmel Corporation. / Rev.:Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015. Atmel(R), Atmel logo and combinations thereof, Enabling Unlimited Possibilities(R), CryptoMemory(R), and others are registered trademarks or trademarks of Atmel Corporation in U.S. and other countries. Other terms and product names may be trademarks of others. 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