Microchip ATECC608B-TFLXTLS Handleiding

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Data Sheet

DS40002249B - 1

Introducon

The ATECC608B-TFLXTLS is a pre-provisioned variant of the ATECC608B. The ATECC608B provides enhanced security measures

over that of the ATECC608A. These enhancements also apply to the ATECC608B-TFLXTLS. The TrustFLEX secure element is part

of Microchip’s family of generically provisioned security-focused devices. The device conguraon was designed to make the

secure element applicable to some of the most common use cases in the IoT market, while minimizing the learning and start-up

curves associated with security devices.

The ATECC608B-TFLXTLS conguraon idencal is nearly to that of the ATECC608B-TNGTLS. Some has beenaddional exibility

provided with respect to data loaded into cercate and key slots and the locking of those slots. These slot accessopons

polices will be set by the Trust Design Suite tools prior to ordering the ATECC608B-TFLXTLS devices. A Single WirePlaorm

Interface (SWI) is also available for this device.opon

This data sheet provides the slot and key conguraon informaon that is unique to the ATECC608B-TFLXTLS. This informaon

clearly the access policies of each of the data zone slots. Only relevant command and I/O denes operang informaon

has been included. An discussing Microchip’s hardware and tools that can aid in developing anapplicaon secon soware

applicaon is also provided with links to the of the tools.addional locaon

Features

• Zone with limited selectable Specied Conguraon opons.

• I/O Opons

– I2C Interface with One-Time Changeable I2C Address

– Single Wire Interface (SWI)

• One Permanent Primary P-256 Ellipc Curve Cryptography (ECC secp256r1) Private Key Fixed at Manufacturing Time

• One Internal Sign Private Key for Key Aestaon

• Three Secondary P-256 ECC Private Keys that Can Be Regenerated by the User

• Signer Public Key from Signer Cercate

• Public Key Validaon Support

• One Customizable Symmetric Secret Key Slot

• IO Key Slot to Protect IProtecon 2C Communicaon

• Secure Boot Enabled with Customizable Secure Boot Public Key at Time of Manufacture

• ECDH/KDF Key Slot Capable of Being Used with AES Keys and Commands

• X.509 Compressed Cercate Storage

• Customizable Cercate Storage Slots

• Available in 8-Pad UDFN and 8-Pin SOIC Packages in 2k unit producon quanes.

Use Cases

• Secure IoT TLS 1.2 and 1.3 Connecons

• Secure Boot/Secure Firmware Update

ATECC608B-TFLXTLS CryptoAuthencaon™ Data

Sheet

ATECC608B-TFLXTLS

Data Sheet

DS40002249B - 2

• Disposable/Accessory Authencaon

• I/P and Data Protecon

ATECC608B-TFLXTLS

Data Sheet

DS40002249B - 3

Table of Contents

Introducon....................................................................................................................................................................................... 1

Features............................................................................................................................................................................................. 1

Use Cases........................................................................................................................................................................................... 1

1. Pin and Pinouts....................................................................................................................................................6Conguraon

2. EEPROM Memory and Data Zone Access Policies...................................................................................................................... 7

2.1. ATECC608B-TFLXTLS Conguraon Zone....................................................................................................................... 7

2.1.1. Zone Bytes.............................................................................................................8Modiable Conguraon

2.2. Data Zone and Access Policies........................................................................................................................................9

2.2.1. Data Zone Data Types.....................................................................................................................................9

2.2.1.1. Private Keys................................................................................................................................ 9

2.2.1.2. Public Keys................................................................................................................................. 9

2.2.1.3. Storage................................................................................................................... 10Cercate

2.2.1.4. Secure Boot..............................................................................................................................10

2.2.1.5. Secret Key................................................................................................................................ 11

2.2.1.6. AES Key Storage....................................................................................................................... 11

2.2.1.7. I/O Key....................................................................................................................11Protecon

2.2.1.8. General Data Storage............................................................................................................... 11

2.2.2. Slot Terminology....................................................................................................................11Conguraon

2.2.3. ATECC608B-TFLXTLS Slot Conguraon Summary....................................................................................... 12

2.2.4. ATECC608B-TFLXTLS Detailed Slot Access Policies....................................................................................... 13

2.3. ATECC608B-TFLXTLS EEPROM One Time Programmable (OTP) Zone.......................................................................... 18

3. RAM (SRAM) Memory.................................................................................................................................................... 19Stac

4. General Command Informaon............................................................................................................................................... 20

4.1. I/O Transacons........................................................................................................................................................... 20

4.2. Command Packets........................................................................................................................................................ 20

4.3. Status/Error Codes....................................................................................................................................................... 20

4.4. Address Encoding......................................................................................................................................................... 21

4.4.1. Zone Addressing.................................................................................................................... 21Conguraon

4.4.2. OTP Zone Addressing................................................................................................................................... 22

4.4.3. Data Zone Addressing.................................................................................................................................. 22

4.5. of Keys, Signatures and ...........................................................................................................23Formang Cercates

4.5.1. ECC Key ...................................................................................................................................... 23Formang

4.5.1.1. Public Key Formats...................................................................................................................24

4.5.2. Signature Format..........................................................................................................................................25

4.5.3. Storage........................................................................................................................................25Cercate

5. Device Commands....................................................................................................................................................................27

5.1. General Device Commands.......................................................................................................................................... 28

5.1.1. Command................................................................................................................................... 28Counter

5.1.2. Command.......................................................................................................................................... 28Info

5.1.3. Command.......................................................................................................................................... 28Lock

5.1.4. Command........................................................................................................................................ 28Nonce