ATSHA204 ATMEL [ATMEL Corporation], ATSHA204 Datasheet - Page 5

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ATSHA204

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

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2.1.1
Configuration Zone
The 88 bytes in the configuration zone contain manufacturing identification data, general device and system configuration, and
access restriction control values for the slots within the data zone. The values of these bytes can always be obtained using the
Read command. The bytes of this zone are arranged as shown in Table 2-1.
Table 2-1.
Byte #
0  3
4  7
8  12
13
14
15
16
17
18
19
20  51
Configuration Zone
Name
SN[0:3]
RevNum
SN[4:8]
Reserved
I2C_Enable
Reserved
I2C_Address
RFU
OTPmode
SelectorMode
SlotConfig
Description
Part of the serial number value
See the Section 2.1.1.2, “Special Memory Values in the Config Zone (Bytes 0
– 12)”
Device revision number
See the Section 2.1.1.2, “Special Memory Values in the Config Zone (Bytes 0
– 12)”
Part of the serial number value
See the Section 2.1.1.2, “Special Memory Values in the Config Zone (Bytes 0
– 12)”
Set by Atmel
Bit 0:
Bits 1-7 are ignored:
Set by Atmel
Bit 0: Ignored
Bits 1-7: For I
form the device address value to which this device will respond. Bits 1, 2, and
4-7 are ignored for single-wire interface parts.
Bit 3 (TTLenable):
See Section 7.4.1 for more information.
For devices in which the I
of 0xC9 on shipment from Atmel.
Reserved for future use, must be written to 0x00.
0xAA (Read-only mode) = Writes to the OTP zone are forbidden when the
OTP zone is locked. Reads of all words are permitted.
0x55 (Consumption mode) = Not supported at this time
Contact Atmel for more information.
0x00 (Legacy mode) = When the OTP zone is locked, writes to the OTP zone,
reads of words 0 and 1, and 32-byte reads are all forbidden. See Section 9 for
more information on compatibility with the Atmel AT88SA102S device.
All other values of OTP mode are reserved and should not be used.
If 0, then Selector can always be written with UpdateExtra.
See Section 8.13 for more details.
Two bytes of access and usage permissions and controls for each slot of the
data zone. See the SlotConfig (Bytes 20 – 51) section below for more details.
If non-zero, Selector can only be written if it currently has a value of zero.
These bits are set at the Atmel factory, depending on the part number, and
cannot be changed.
0 = the device operates in single-wire interface mode
1 = the device operates in I
1 = the input levels are V
0 = the input levels use a fixed reference
2
C interface parts, the most-significant seven bits of this byte
2
C interface is enabled this byte has a default value
CC
2
referenced
C interface mode
Atmel ATSHA204 [DATASHEET]
8740D−CRYPTO−3/12
Write
Never
Never
Never
Never
Never
Never
If config
unlocked
If config
unlocked
If config
unlocked
If config
unlocked
If config
unlocked
Read
Always
Always
Always
Always
Always
Always
Always
Always
Always
Always
Always
5

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