DataZone Addressing

Read/Write access to the Data zone is much more complex than the Configuration and OTP zones. There are a total of 16 slots and the size of the slots vary. Each slot’s access policies individually control whether or not a slot has the ability to be read or written.

For the ATECC608A-TNGTLS:

Data Slots 6, 8-9 can be written as clear text.
No Data Slots can be written with encrypted text.
Data Slots 8 and 10-12 can be read as clear text.
Any slots not specified cannot be read or written.

Table 1. Address Format by Data Slot Size
Data Zone	Byte 1 Addr[15:8]		Byte 0: Addr[7:0]
Data Zone	Unused	Block	Unused	Slot	Offset
Data Slots[7:0]	Addr[15:9]	Addr[8]	Addr[7]	Addr[6:3]	Addr[2:0]
Data Slot[8]	Addr[15:12]	Addr[11:8]	Addr[7]	Addr[6:3]	Addr[2:0]
Data Slot[15:9]	Addr[15:10]	Addr[9:8]	Addr[7]	Addr[6:3]	Addr[2:0]

Data Slots[7:0]

To fully access one of these slots require two 32-byte accesses or nine 4-byte accesses

Table 2. Data Zone Addresses Slots 0-7
Slot# (Addr[6:3])	Block # (Addr[8])	Block Offset Value (Addr[2:0])
Slot# (Addr[6:3])	Block # (Addr[8])	`000`	`001`	`010`	`011`	`100`	`101`	`110`	`111`
0x0 to 0x7	`00`	[0:3]	[4:7]	[8:11]	[12:15]	[16:19]	[20:23]	[24:27]	[28:31]
0x0 to 0x7	`01`	[32:35]	Not Valid	Not Valid	Not Valid	Not Valid	Not Valid	Not Valid	Not Valid

Data Slot[8]

To fully access this slot require thirteen 32-byte accesses or 104 4-byte accesses or a combination of the two methods.

Table 3. Data Zone Addressing Slot 8
Slot# (Addr[6:3])	Block # (Addr[8])	Block Offset Value (Addr[2:0])
Slot# (Addr[6:3])	Block # (Addr[8])	`000`	`001`	`010`	`011`	`100`	`101`	`110`	`111`
0x8	0x0	[0:3]	[4:7]	[8:11]	[12:15]	[16:19]	[20:23]	[24:27]	[28:31]
	0x1	[32:35]	[36:39]	[40:43]	[44:47]	[48:51]	[52:55]	[56:59]	[60:63]
	...	...	...	...	...	...	...	...	...
	0xC	[384:387]	[388:391]	[392:395]	[396:399]	[400:403]	[404:407]	[408:411]	[412:415]

Data Slots[15:9]

To fully access these slots requires three 32-byte accesses or eighteen 4-byte accesses or a combination of the two methods.

Table 4. Data Zone Addressing Slots 9-15
Slot# (Addr[6:3])	Block # (Addr[8])	Block Offset Value (Addr[2:0])
Slot# (Addr[6:3])	Block # (Addr[8])	`000`	`001`	`010`	`011`	`100`	`101`	`110`	`111`
0x9 to 0xF	00	[0:3]	[4:7]	[8:11]	[12:15]	[16:19]	[20:23]	[24:27]	[28:31]
	01	[32:35]	[36:39]	[40:43]	[44:47]	[48:51]	[52:55]	[56:59]	[60:63]
	10	[64:67]	[68:71]	Not Valid	Not Valid	Not Valid	Not Valid	Not Valid	Not Valid