4.4.2 OTP Zone Addressing

The One-Time Programmable (OTP) zone can be accessed either 4 or 32 bytes at a time. The zone has a total of 64 bytes. Individual bytes cannot be accessed. The OTP zone address is a 2-byte (16-bit value). Only the lowest four bits are used in addressing.

For the ATECC608A-TNGLoRaWAN device, these addresses can only be used with the Read command.

Table 4-6. Address Format
Byte 1: Addr[15:8]Byte 0: Addr[7:0]
UnusedUnusedBlockOffset
Addr[15:8]Addr[7:4]Addr[3]Addr[2:0]
Table 4-7. OTP Zone Byte Addresses

Block #
(Addr[3)

Block Offset Value (Addr[2:0])
000001010011100101110111
0[0:3][4:7][8:11][12:15][16:19][20:23][24:27][28:31]
1[32:35][36:39][40:43][44:47][48:51][52:55][56:59][60:63]