2.3 ATECC608B-TNGTLS EEPROM One Time Programmable (OTP) Zone

The OTP zone of 64 bytes (512 bits) is part of the EEPROM array and is used for read-only storage. It is organized as two blocks of 32 bytes each. For the ATECC608B-TNGTLS, the OTP zone is shipped pre-locked and contains the following information:

78 36 74 6A 75 5A 4D 79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

The data byte values written into the OTP zone are always available for reading using either 4- or 32-byte reads but can never be modified.

Notice: The bytes in the OTP zone may change over time. These values should not be used in any cryptographic calculations.