Contents

Introduction Features Applications 1. Pin Configuration and Pinouts 2. EEPROM Memory and Data Zone Access Policies 2.1. ATECC608A-TFLXTLS Configuration Zone 2.1.1. Modifiable Configuration Zone Bytes 2.2. Data Zone and Access Policies 2.2.1. Data Zone Data Types 2.2.1.1. Private Keys 2.2.1.2. Public Keys 2.2.1.3. Certificate Storage 2.2.1.4. Secure Boot 2.2.1.5. Secret Key 2.2.1.6. AES Key Storage 2.2.1.7. I/O Protection Key 2.2.1.8. General Data Storage 2.2.2. Slot Configuration Terminology 2.2.3. ATECC608A-TFLXTLS Slot Configuration Summary 2.2.4. ATECC608A-TFLXTLS Detailed Slot Access Policies 2.3. ATECC608A-TFLXTLS EEPROM One Time Programmable (OTP) Zone 3. Static RAM (SRAM) Memory 4. General Command Information 4.1. I/O Transactions 4.2. Command Packets 4.3. Status/Error Codes 4.4. Address Encoding 4.4.1. Configuration Zone Addressing 4.4.2. OTP Zone Addressing 4.4.3. DataZone Addressing 4.5. Formatting of Keys, Signatures and Certificates 4.5.1. ECC Key Formatting 4.5.1.1. Public Key Formats 4.5.2. Signature Format 4.5.3. Certificate Storage 5. Device Commands 5.1. General Device Commands 5.1.1. Counter Command 5.1.2. Info Command 5.1.2.1. Info - Revision 5.1.2.2. Info - KeyValid 5.1.2.3. Info - Device State 5.1.2.4. Info - Write GPIO Output 5.1.2.5. Info - Persistent Latch Read 5.1.3. Lock Command 5.1.3.1. SlotLock 5.1.4. Nonce Command 5.1.4.1. Nonce - Random 5.1.4.2. Nonce - Fixed 5.1.5. Random Command 5.1.6. Read Command 5.1.6.1. Clear Text Read 5.1.6.2. Encrypted Read 5.1.7. SelfTest Command 5.1.8. SHA Command 5.1.8.1. SHA - SHA256 Digest 5.1.8.2. SHA - HMAC Digest 5.1.8.3. SHA - Context Switching 5.1.9. UpdateExtra Command 5.1.10. Write Command 5.1.10.1. Data Zone - Clear Text Write 5.1.10.2. Data Zone - Encrypted Write 5.2. Asymmetric Cryptography Commands 5.2.1. ECDH Command 5.2.1.1. ECDH - Stored Key 5.2.1.2. ECDH - TempKey Source 5.2.2. GenKey Command 5.2.2.1. Private Key - Stored in Slot 5.2.2.2. Private Key - Stored in TempKey 5.2.2.3. Public Key Generation 5.2.2.4. Public Key Digest Generation 5.2.3. SecureBoot Command 5.2.3.1. SecureBoot - FullCopy 5.2.3.2. SecureBoot - FullStore (Digest) 5.2.4. Sign Command 5.2.4.1. Sign - Internal Message 5.2.4.2. Sign - External Message 5.2.5. Verify Command 5.2.5.1. Verify - External Public Key Mode 5.2.5.2. Verify - Stored Public Key Mode 5.2.5.3. Verify - Validate and Invalidate 5.3. Symmetric Cryptography Commands 5.3.1. AES Command 5.3.1.1. AES-ECB Encrypt 5.3.1.2. AES-ECB Decrypt 5.3.1.3. AES-GFM 5.3.2. CheckMac Command 5.3.3. GenDig Command 5.3.3.1. GenDig - Config 5.3.3.2. GenDig - OTP 5.3.3.3. GenDig - Data 5.3.3.4. GenDig - Shared Nonce 5.3.3.5. GenDig - Counter 5.3.3.6. GenDig - Key Config 5.3.4. KDF Command 5.3.5. MAC Command 5.3.5.1. Non-Diversified MAC 5.3.5.2. Diversified MAC 6. Application Information 6.1. Use Cases 6.2. Development Tools 6.2.1. Trust Platform Design Suite 6.2.2. Hardware Tools 6.2.3. CryptoAuthLib 6.3. TrustFLEX vs. Trust&GO 7. I2C Interface 7.1. I/O Conditions 7.1.1. Device is Asleep 7.1.2. Device is Awake 7.2. I2C Transmission to ATECC608A-TFLXTLS 7.2.1. Word Address Values 7.2.2. I2C Synchronization 7.3. Sleep Sequence 7.4. Idle Sequence 7.5. I2C Transmission from the ATECC608A-TFLXTLS 8. Single-Wire Interface 8.1. I/O Tokens 8.2. I/O Flags 8.3. Synchronization 8.3.1. I/O Timeout 8.3.2. Synchronization Procedures 8.4. GPIO 8.5. Wiring Configuration for Single-Wire Interface 9. Electrical Characteristics 9.1. Absolute Maximum Ratings 9.2. Reliability 9.3. AC Parameters: All I/O Interfaces 9.3.1. AC Parameters: I2C Interface 9.3.2. AC Parameters: Single-Wire Interface 9.4. DC Parameters: All I/O Interfaces 9.4.1. VIH and VIL Specifications 10. Package Drawings 10.1. Package Marking Information 10.2. 8-pad UDFN 10.3. 8-lead SOIC 11. Revision History The Microchip Website Product Change Notification Service Customer Support Product Identification System Microchip Devices Code Protection Feature Legal Notice Trademarks Quality Management System Worldwide Sales and Service