ATSHA204 ATMEL [ATMEL Corporation], ATSHA204 Datasheet - Page 6

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ATSHA204

Manufacturer Part Number
ATSHA204
Description
Atmel CryptoAuthentication
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet

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Byte #
52,54,56,58
60,62,64,66
53,55,57,59
61,63,65,67
68  83
84
85
86
87
Name
UseFlag
UpdateCount
LastKeyUse
UserExtra
Selector
LockValue
LockConfig
Description
For “single use” keys (Section 3.3), this byte indicates how many times a key
may be used before such use is disabled. Applies to keys #0-7 only (byte 52
corresponds to Key0, 54 to Key1, and so on). Initialized to 0xFF.
See Section 3.3.
For keys that can be updated with DeriveKey, these bytes indicate how many
times this operation has been performed. Applies to keys #0-7 only, (byte 53
corresponds to Key0, 55 to Key1, and so on).
Initialized to 0x00.
See Sections 3.3 and 8.2.
128 bits to control limited use for KeyID 15.
Initialized to 0xFF.
See Section 3.3.
1-byte value that can be modified via the UpdateExtra command after the
data zone has been locked.
Selects which device will remain in active mode after the execution of the
pause command.
See Sections 8.10 and 8.13 for more details.
Controls the ability to write the OTP and data zones.
0x55 = unlocked
0x00 = locked
On shipment from Atmel, this byte has a value of 0x55 corresponding to the
“unlocked” state. After the lock command has been run, this byte will have a
value of 0x00, corresponding to “locked.” See Sections 2.1.2 and 8.7 for more
details.
When locked, the OTP zone can be modified only with the Write command,
and slots in the data zone can be modified only if the corresponding
WriteConfig field so indicates.
When unlocked, the Read command is prohibited within these two zones.
Controls the ability to modify the configuration zone.
0x55 = unlocked
0x00 = locked
On shipment from Atmel this byte has a value of 0x55 corresponding to the
“unlocked” state. After the lock command has been run, this byte will have a
value of 0x00, corresponding to”locked.”
See Sections 2.1.2 and 8.7 for more details.
Atmel ATSHA204 [DATASHEET]
8740D−CRYPTO−3/12
Write
If config
unlocked
If config
unlocked
If config
unlocked
Via
update
extra
cmd only
Via
update
extra
cmd only
Via lock
command
only
Via lock
command
only
Read
Always
Always
Always
Always
Always
Always
Always
6

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