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]
Unused	Unused	Block	Offset
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])
Block # (Addr[3)	`000`	`001`	`010`	`011`	`100`	`101`	`110`	`111`
`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]