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.
| 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] |
|
Block # |
Block Offset Value (Addr[2:0]) | |||||||
|---|---|---|---|---|---|---|---|---|
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] |