ATECC608A datasheet(22/81 Pages) MICROCHIP

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4.4

Address Encoding

The following subsections provide detailed information on how to address the various memory zones of the

ATECC608A-TNGLoRaWAN device.

4.4.1

Configuration Zone Addressing

The Configuration zone can be accessed either 4 or 32 bytes at a time. Individual bytes cannot be accessed. The

Configuration zone address is a 2-byte (16-bit value). Only the lowest five bits of the address word are used in

addressing of the Configuration zone. For the ATECC608A-TNGLoRaWAN device, these addresses can only be

used with the Read command.

Table 4-4. Address Format

Byte 1: Addr[15:8]

Byte 0: Addr[7:0]

Unused

Block

Offset

Addr[15:8]

Addr[7:5]

Addr[4:3]

Addr[2:0]

Table 4-5. Configuration Zone Addresses

Block #

(Addr[4:3])

Offset Value (Addr[2:0])

000

001

010

011

100

101

110

111

[0:3]

[4:7]

[8:11]

[12:15]

[16:19]

[20:23]

[24:27]

[28:31]

[32:35]

[36:39]

[40:43]

[44:47]

[48:51]

[52:55]

[56:59]

[60:63]

[64:67]

[68:71]

[72:75]

[76:79]

[80:83]

[84:87]

[88:91]

[92:95]

[96:99]

[100:103]

[104:107]

[108:111]

[112:115]

[116:119]

[120:123]

[124:127]

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

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])

000

001

010

011

100

101

110

111

[0:3]

[4:7]

[8:11]

[12:15]

[16:19]

[20:23]

[24:27]

[28:31]

[32:35]

[36:39]

[40:43]

[44:47]

[48:51]

[52:55]

[56:59]

[60:63]

ATECC608A-TNGLoRaWAN

General Command Information

Complete Datasheet

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