ATAES132-SH-ER Atmel, ATAES132-SH-ER Datasheet - Page 16

• Manufacturer Part Number: ATAES132-SH-ER
• Description: EEPROM AES 32Kbit EE I2C
• Manufacturer: Atmel

Specifications of ATAES132-SH-ER

• Rohs: yes
• Maximum Clock Frequency: 1 MHz
• Operating Supply Voltage: 6 V
• Maximum Operating Temperature: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Interface Type: I2C
• Factory Pack Quantity: 2300

4.
4.1.
Security Configuration Registers
User Zone Configuration
Access permissions to each user zone are controlled by the ZoneConfig registers in the configuration memory. There is one
ZoneConfig register for each user memory zone.
Table 4-5.
Notes:
ZoneConfig Field
AuthRead
AuthWrite
EncRead
EncWrite
WriteMode
UseSerial
UseSmall
ReadID
AuthID
Reserved
WriteID
ReadOnly
1.
2.
Definition of the ZoneConfig Register bits
Most changes to the ZoneConfig registers take effect immediately. Changes to the AuthRead and EncRead bits
do not affect the SPI or I
Warning:
protect the customer secrets. See Section 7.19 for the lock command.
Byte
0
0
0
0
0
0
0
1
1
2
2
3
The Atmel ATAES132 must always be locked by the customer prior to shipment to the end user to
Bit
0
1
2
3
4 to 5
6
7
0 to 3
4 to 7
0 to 3
4 to7
0 to 7
2
C Read command until the next reset or power up.
Description
If 1b, then authentication is required to read data
If 0b, then authentication is not required to read data
If 1b, then authentication is required to write data
If 0b, then authentication is not required to write data
If 1b, then encryption is required to read data
If 0b, then encryption is not required to read data
If 1b, then encryption is required to write data
If 0b, then encryption is not required to write data
If 00b, then this zone is permanently read/write
If 01b, then this zone is permanently read-only
If 10b, then the ReadOnly byte determines if writes are permitted
If 11b, then the ReadOnly byte determines if writes are permitted and the Lock
If UseSerial = 1b and EncWrite = 1b, then the SerialNum must be included in
If UseSmall = 1b and EncWrite = 1b, the first 4 bytes of SmallZone must be included
KeyID which is used to encrypt data read from this zone
The same key is used to generate the MAC
KeyID which is used for inbound authentication before access is permitted
Reserved for future use. All bits must be 0b
KeyID which is used to decrypt data written to this zone
The same key is used to verify the MAC
The contents of this byte are ignored unless WriteMode contains 10b or 11b
If 0x55, then the User Zone is read/write
If any other value, then the User Zone is Read-Only
This byte can be updated after the Configuration Memory is locked by using the Lock
command must include an authenticating MAC calculated using the KeyID
stored in ZoneConfig[UZ].WriteID.
EncWrite operations. If EncWrite = 0b, then this bit is ignored.
in EncWrite operations. If EncWrite = 0b, this bit is ignored.
command (See Section 7.19.)
(1)(2)
Atmel ATAES132 Preliminary Datasheet
8760A−CRYPTO−5/11
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